/* =====================================================================================================
   BASE — tokens, reset, typography, buttons, forms, top bar, footer
   ===================================================================================================== */
:root{
  color-scheme:light;
  --fs:1;
  --f-body:"SS3","NDev",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-ui:"Mont","SS3","NDev",system-ui,-apple-system,sans-serif;
  --f-disp:"Corm","Cormorant Garamond",Georgia,"Times New Roman",serif;

  --navy:#0D2545;--navy-2:#16335F;--navy-3:#081A33;--navy-4:#0B2040;
  --gold:#C9A84C;--gold-2:#E3C878;--gold-d:#8F6D12;--gold-t:#FBF3DA;

  --bg:#FBFAF6;--bg-2:#F4F1E8;--surface:#FFFFFF;--surface-2:#FAF8F2;--surface-3:#F1EEE4;
  --ink:#1B2433;--ink-2:#364156;--muted:#5E6A7E;--soft:#8A94A6;
  --line:#E6E1D3;--line-2:#EFEBDF;
  --shadow-1:0 1px 2px rgba(13,37,69,.05),0 1px 1px rgba(13,37,69,.03);
  --shadow-2:0 2px 4px rgba(13,37,69,.04),0 14px 34px -16px rgba(13,37,69,.20);
  --shadow-3:0 4px 8px rgba(13,37,69,.05),0 30px 64px -26px rgba(13,37,69,.32);
  --r:16px;--r-s:10px;--r-l:26px;

  --good:#139B6A;--good-t:#E3F6EE;--good-d:#0B6E4B;
  --bad:#D8453C;--bad-t:#FDEBE9;--bad-d:#A3281F;--warn:#E8731A;

  --ac:#2F6FDE;--ac-dark:#1D4FA8;--ac-tint:#EAF1FD;--panel:#EFF4FD;--past:#E2EAF9;
  --ac-soft:color-mix(in srgb,var(--ac) 9%,var(--surface));
  --ac-ink:var(--ac-dark);
  --ac-line:color-mix(in srgb,var(--ac) 30%,var(--surface));
  --btn-bg:var(--navy);--btn-ink:#fff;
  --topbar-h:64px;
  --focus:0 0 0 3px color-mix(in srgb,var(--ac) 38%,transparent);
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0A111E;--bg-2:#0D1626;--surface:#111B2E;--surface-2:#0F1829;--surface-3:#16223A;
  --ink:#E7ECF5;--ink-2:#C9D3E4;--muted:#9BA8BF;--soft:#7684A0;
  --line:#22304A;--line-2:#1A263D;
  --shadow-1:0 1px 2px rgba(0,0,0,.35);
  --shadow-2:0 2px 4px rgba(0,0,0,.3),0 16px 38px -16px rgba(0,0,0,.6);
  --shadow-3:0 4px 8px rgba(0,0,0,.35),0 34px 70px -26px rgba(0,0,0,.75);
  --good-t:color-mix(in srgb,var(--good) 16%,var(--surface));--good-d:#5FD8A9;
  --bad-t:color-mix(in srgb,var(--bad) 16%,var(--surface));--bad-d:#FF9C94;
  --gold-t:color-mix(in srgb,var(--gold) 13%,var(--surface));--gold-d:#E3C878;
  --btn-bg:#E3C878;--btn-ink:#0D2545;
}
[style*="--ac"],.chapter,.course,.mod{
  --ac-soft:color-mix(in srgb,var(--ac) 9%,var(--surface));
  --ac-ink:var(--ac-dark);
  --ac-line:color-mix(in srgb,var(--ac) 30%,var(--surface));
}
:root[data-theme="dark"] [style*="--ac"],:root[data-theme="dark"] .chapter,:root[data-theme="dark"] .course,:root[data-theme="dark"] .mod{
  --ac-soft:color-mix(in srgb,var(--ac) 18%,var(--surface));
  --ac-ink:color-mix(in srgb,var(--ac) 52%,#fff);
  --ac-line:color-mix(in srgb,var(--ac) 40%,var(--surface));
}
:root[data-theme="dark"]{--ac-ink:color-mix(in srgb,var(--ac) 52%,#fff)}

/* module / part palettes (the books' own colours) */
.m1{--ac:#2F6FDE;--ac-dark:#1D4FA8;--ac-tint:#EAF1FD;--panel:#EFF4FD;--past:#E2EAF9}
.m2{--ac:#7C4DDB;--ac-dark:#5833AC;--ac-tint:#F1EBFD;--panel:#F5F0FE;--past:#E9E0FB}
.m3{--ac:#E8731A;--ac-dark:#B2530A;--ac-tint:#FDF0E3;--panel:#FEF4EA;--past:#FBE6D2}
.m4{--ac:#139B6A;--ac-dark:#0B6E4B;--ac-tint:#E3F6EE;--panel:#EAF8F2;--past:#D5F0E4}
.m5{--ac:#D4387C;--ac-dark:#A5225A;--ac-tint:#FCE9F2;--panel:#FDEFF6;--past:#F9DCEB}
.m6{--ac:#0E8FA6;--ac-dark:#096578;--ac-tint:#E1F5F8;--panel:#E9F7FA;--past:#D3EEF3}
.course-pron.m4{--ac:#0E8FA6;--ac-dark:#096578;--ac-tint:#E1F5F8;--panel:#E9F7FA;--past:#D3EEF3}

/* ---------------------------------------------------------------------------------------- reset */
*,*::before,*::after{box-sizing:border-box}
html{font-size:calc(16px * var(--fs,1));-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--topbar-h) + 18px)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.0625rem/1.65 var(--f-body);font-feature-settings:"kern","liga";-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;min-height:100vh;display:flex;flex-direction:column}
body>main,body>.reading{flex:1 0 auto}
img,svg{max-width:100%}
a{color:var(--ac-ink,#1D4FA8);text-decoration-thickness:.08em;text-underline-offset:.18em}
a:hover{text-decoration-thickness:.14em}
p{margin:0}
h1,h2,h3,h4{margin:0}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--ac);outline-offset:2px;border-radius:6px}
.skip{position:absolute;left:12px;top:-60px;background:var(--navy);color:#fff;padding:10px 16px;border-radius:10px;z-index:200;font:600 14px var(--f-ui);text-decoration:none}
.skip:focus{top:10px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 clamp(16px,4vw,36px)}
.hi{font-family:"NDev","SS3",sans-serif;font-size:1.04em;line-height:1.3;font-style:normal}
.hi *{font-style:normal}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
::selection{background:color-mix(in srgb,var(--gold) 38%,transparent)}
.ic{flex:none;vertical-align:middle}

/* ---------------------------------------------------------------------------------------- buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;padding:.7em 1.25em;border-radius:12px;border:1.5px solid transparent;font:600 .84rem/1.1 var(--f-ui);
  letter-spacing:.01em;text-decoration:none;cursor:pointer;transition:transform .15s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;white-space:nowrap}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.sm{padding:.5em .9em;font-size:.76rem;border-radius:10px}
.btn.lg{padding:.95em 1.6em;font-size:.92rem;border-radius:14px}
.btn.wide{width:100%}
.btn.primary{background:var(--btn-bg);color:var(--btn-ink);box-shadow:0 6px 16px -8px color-mix(in srgb,var(--btn-bg) 70%,transparent)}
.chapter .btn.primary,.course .btn.primary{--btn-bg:var(--ac);--btn-ink:#fff}
.btn.primary:hover{filter:brightness(1.08)}
.btn.gold{background:linear-gradient(180deg,#E6CD82,#C9A84C);color:#0B2040;box-shadow:0 8px 22px -10px rgba(201,168,76,.75),inset 0 1px 0 rgba(255,255,255,.5)}
.btn.gold:hover{filter:brightness(1.05);box-shadow:0 12px 28px -10px rgba(201,168,76,.85),inset 0 1px 0 rgba(255,255,255,.5)}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--ink-2)}
.btn.ghost:hover{border-color:var(--ac,var(--navy));color:var(--ac-ink,var(--ink));background:var(--ac-soft)}
.btn.light{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.28);color:#fff;backdrop-filter:blur(6px)}
.btn.light:hover{background:rgba(255,255,255,.2)}
.btn.outline-light{background:transparent;border-color:rgba(255,255,255,.4);color:#fff}
.btn.outline-light:hover{background:rgba(255,255,255,.1);border-color:#fff}
.btn.good{background:var(--good);color:#fff}
.btn[aria-pressed="true"]{background:var(--gold);color:#0B2040;border-color:var(--gold)}
.btn[disabled]{opacity:.5;pointer-events:none}
.btn .lbl{display:inline}

/* ---------------------------------------------------------------------------------------- forms */
.field{display:flex;align-items:center;gap:10px;background:var(--surface);border:1.5px solid var(--line);border-radius:12px;padding:0 14px;min-height:46px;transition:border-color .2s,box-shadow .2s}
.field:focus-within{border-color:var(--ac);box-shadow:var(--focus)}
.field svg{color:var(--soft)}
.field input{flex:1;min-width:0;border:0;background:transparent;outline:none;padding:11px 0;font-size:1rem;color:var(--ink)}
.field input::placeholder{color:var(--soft)}
input[type="search"]::-webkit-search-cancel-button{opacity:.5}
.switch{display:inline-flex;align-items:center;gap:10px;cursor:pointer;font:600 .8rem/1.2 var(--f-ui);color:var(--ink-2);user-select:none}
.switch input{position:absolute;opacity:0;pointer-events:none}
.switch .sw{position:relative;width:38px;height:22px;border-radius:12px;background:var(--line);transition:background .2s;flex:none}
.switch .sw::after{content:"";position:absolute;left:3px;top:3px;width:16px;height:16px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.3);transition:transform .2s}
.switch input:checked+.sw{background:var(--good)}
.switch input:checked+.sw::after{transform:translateX(16px)}
.switch input:focus-visible+.sw{box-shadow:var(--focus)}
.switch small{font-weight:500;color:var(--soft);margin-left:2px}
.seg{display:inline-flex;background:var(--surface-3);border-radius:12px;padding:3px;gap:2px}
.seg button{border:0;background:transparent;padding:.55em 1em;border-radius:9px;font:600 .78rem/1 var(--f-ui);color:var(--muted);transition:all .15s}
.seg button:hover{color:var(--ink)}
.seg button.is-on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow-1)}
.seg.wrapx{flex-wrap:wrap}
input[type="checkbox"]{accent-color:var(--ac,var(--good));width:1.1em;height:1.1em}
textarea{width:100%;resize:vertical;border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;background:var(--surface);color:var(--ink);line-height:1.5}
textarea:focus{outline:none;border-color:var(--ac);box-shadow:var(--focus)}
kbd{font:600 .7rem/1 var(--f-ui);padding:.28em .5em;border-radius:6px;border:1px solid var(--line);background:var(--surface-3);color:var(--muted);box-shadow:0 1px 0 var(--line)}
.bar{height:6px;border-radius:6px;background:var(--line);overflow:hidden}
.bar>i{display:block;height:100%;width:0;border-radius:6px;background:linear-gradient(90deg,var(--ac),color-mix(in srgb,var(--ac) 60%,var(--gold)));transition:width .6s cubic-bezier(.2,.8,.2,1)}
.eyebrow{display:inline-block;font:700 .7rem/1.2 var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--gold-d)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:clamp(18px,2.6vw,28px);box-shadow:var(--shadow-1)}
.card-t{font:700 1.35rem/1.2 var(--f-disp);margin:0 0 14px;color:var(--ink);display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.card-t small{font:500 .78rem var(--f-ui);color:var(--soft)}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font:600 .72rem/1.3 var(--f-ui);letter-spacing:.04em;color:rgba(255,255,255,.62);margin-bottom:18px}
.crumbs a{color:rgba(255,255,255,.82);text-decoration:none}
.crumbs a:hover{color:#fff;text-decoration:underline}
.crumbs .sep{opacity:.4}
.crumbs [aria-current]{color:var(--gold-2)}
.hr{position:absolute;border-radius:50%;border:1.5px solid rgba(201,168,76,.22);pointer-events:none}
.hr1{width:360px;height:360px;right:-90px;top:-150px}
.hr2{width:230px;height:230px;right:70px;top:-120px;border-color:rgba(255,255,255,.08)}
.hr3{width:170px;height:170px;left:-60px;bottom:-90px;border-color:rgba(255,255,255,.07)}

/* ---------------------------------------------------------------------------------------- top bar */
.topbar{position:sticky;top:0;z-index:60;height:var(--topbar-h);background:color-mix(in srgb,var(--surface) 84%,transparent);backdrop-filter:saturate(1.5) blur(16px);
  -webkit-backdrop-filter:saturate(1.5) blur(16px);border-bottom:1px solid color-mix(in srgb,var(--line) 80%,transparent)}
.tb-in{height:100%;max-width:1600px;margin:0 auto;padding:0 clamp(14px,3vw,28px);display:flex;align-items:center;gap:clamp(10px,2vw,28px)}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);flex:none}
.brand-mark{display:block;width:36px;height:36px;border-radius:11px;box-shadow:0 6px 14px -6px rgba(13,37,69,.55)}
.brand-mark .logo{display:block;width:100%;height:100%}
.brand-name{font:600 1.5rem/1 var(--f-disp);letter-spacing:.005em;color:var(--ink)}
.brand-name b{font-weight:700;color:var(--ink)}
.tb-nav{display:flex;align-items:center;gap:4px;margin-left:8px}
.tb-nav>a,.nav-dd-btn{position:relative;display:inline-flex;align-items:center;gap:6px;padding:.55em .95em;border-radius:10px;border:0;background:transparent;text-decoration:none;
  font:600 .82rem/1 var(--f-ui);letter-spacing:.01em;color:var(--ink-2);transition:background .15s,color .15s}
.tb-nav>a:hover,.nav-dd-btn:hover{background:var(--surface-3);color:var(--ink);text-decoration:none}
.tb-nav>a[aria-current="page"],.nav-dd-btn.is-active{color:var(--ink);background:var(--surface-3)}
.tb-nav>a[aria-current="page"]::after,.nav-dd-btn.is-active::after{content:"";position:absolute;left:.95em;right:.95em;bottom:2px;height:2px;border-radius:2px;background:var(--gold)}
.nav-dd{position:relative}
.nav-dd-menu{position:absolute;left:0;top:calc(100% + 8px);min-width:340px;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-3);padding:8px;
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:all .18s ease}
.nav-dd.open .nav-dd-menu{opacity:1;visibility:visible;transform:none}
.nav-dd-menu a{display:flex;gap:12px;align-items:center;padding:10px 12px;border-radius:12px;text-decoration:none;color:var(--ink)}
.nav-dd-menu a:hover{background:var(--surface-3);text-decoration:none}
.nav-dd-menu b{display:block;font:700 .84rem/1.2 var(--f-ui)}
.nav-dd-menu small{display:block;color:var(--muted);font-size:.8rem;line-height:1.3;margin-top:2px}
.dd-ic{flex:none;width:38px;height:38px;border-radius:11px;background:var(--surface-3);display:grid;place-items:center;color:var(--gold-d)}
.nav-dd-menu .dd-all{justify-content:flex-end;font:700 .76rem var(--f-ui);color:var(--ink-2);padding:8px 12px}
.tb-actions{margin-left:auto;display:flex;align-items:center;gap:6px}
.tb-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:40px;min-width:40px;padding:0 11px;border-radius:12px;border:1px solid transparent;background:transparent;color:var(--ink-2);transition:all .15s}
.tb-btn:hover{background:var(--surface-3);color:var(--ink)}
.tb-search{border-color:var(--line);background:var(--surface);padding:0 10px 0 12px;min-width:200px;justify-content:flex-start;color:var(--soft)}
.tb-search:hover{border-color:var(--soft)}
.tb-search-text{font:500 .86rem var(--f-body);flex:1;text-align:left}
.tb-aa .aa{font:700 .95rem/1 var(--f-disp);letter-spacing:-.02em}
.tb-aa .aa::first-letter{font-size:1.15em}
.i-sun{display:none}
:root[data-theme="dark"] .i-sun{display:block}
:root[data-theme="dark"] .i-moon{display:none}
.tb-menu{display:none}
.read-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none;opacity:0;transition:opacity .2s}
.read-progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--ac,var(--gold)),var(--gold))}
body.p-chapter .read-progress{opacity:1}

/* mobile sheet / popovers (built by JS) */
.sheet{position:fixed;inset:0;z-index:90;display:flex;justify-content:flex-end;background:rgba(5,12,24,.55);backdrop-filter:blur(4px);animation:fade .2s ease}
.sheet-in{width:min(88vw,360px);height:100%;background:var(--surface);padding:18px;overflow:auto;box-shadow:var(--shadow-3);animation:slide .25s cubic-bezier(.2,.8,.2,1);display:flex;flex-direction:column;gap:6px}
.sheet-h{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.sheet a{display:flex;align-items:center;gap:12px;padding:13px 12px;border-radius:12px;text-decoration:none;color:var(--ink);font:600 .92rem var(--f-ui)}
.sheet a:hover,.sheet a[aria-current]{background:var(--surface-3)}
.sheet h4{font:700 .66rem var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--soft);margin:14px 12px 4px}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes slide{from{transform:translateX(30px);opacity:0}to{transform:none;opacity:1}}

/* ---------------------------------------------------------------------------------------- footer */
.site-foot{margin-top:auto;background:linear-gradient(180deg,#0A1B36,#071428);color:#AEBBD3;padding:clamp(40px,6vw,64px) 0 28px;border-top:1px solid rgba(201,168,76,.25)}
.foot-in{max-width:1200px;margin:0 auto;padding:0 clamp(16px,4vw,36px);display:grid;gap:34px}
.foot-brand{display:flex;gap:14px;align-items:flex-start;max-width:420px}
.foot-brand b{font:700 1.5rem var(--f-disp);color:#fff}
.foot-brand p{font-size:.92rem;margin-top:4px;color:#93A3C0}
.foot-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.foot-cols h4{font:700 .68rem var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--gold);margin-bottom:12px}
.foot-cols a{display:block;color:#C3CEE3;text-decoration:none;padding:4px 0;font-size:.95rem}
.foot-cols a:hover{color:#fff;text-decoration:underline}
.foot-legal{display:flex;flex-direction:column;gap:4px;font-size:.8rem;color:#7B8CAA;border-top:1px solid rgba(255,255,255,.08);padding-top:20px}
.foot-legal span:first-child{color:#B7C3DA;font-weight:600}

@media (max-width:1020px){
  .tb-nav{display:none}
  .tb-menu{display:inline-flex}
  .tb-search{min-width:40px;padding:0 11px}
  .tb-search-text,.tb-search kbd{display:none}
}
@media (max-width:640px){
  :root{--topbar-h:58px}
  .brand-name{font-size:1.28rem}
  .brand-mark{width:32px;height:32px}
  .foot-cols{grid-template-columns:1fr 1fr}
  .tb-aa{display:none}
}

/* smooth page-to-page crossfade (progressive enhancement) */
@view-transition{navigation:auto}
::view-transition-old(root),::view-transition-new(root){animation-duration:.22s}
.topbar{view-transition-name:topbar}

/* =====================================================================================================
   LAYOUT — chapter reading layout: outline | article | rail
   ===================================================================================================== */
.reading{display:grid;grid-template-columns:300px minmax(0,1fr) 236px;gap:clamp(20px,2.6vw,44px);max-width:1640px;width:100%;margin:0 auto;padding:22px clamp(14px,2.4vw,32px) 60px;align-items:start}
.chapter{min-width:0;max-width:900px;width:100%;margin:0 auto}
[data-wide="1"] .chapter{max-width:1080px}

/* ---------------------------------------------------------------------------------------- outline */
.outline{position:sticky;top:calc(var(--topbar-h) + 18px);max-height:calc(100vh - var(--topbar-h) - 36px);display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-1);overflow:hidden}
.ol-head{padding:16px 16px 12px;border-bottom:1px solid var(--line-2);background:linear-gradient(180deg,var(--surface),var(--surface-2))}
.ol-course{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font:700 .82rem/1.25 var(--f-ui)}
.ol-course svg{color:var(--gold-d)}
.ol-course:hover{text-decoration:underline}
.ol-prog{display:flex;align-items:center;gap:10px;margin-top:11px}
.ol-prog .bar{flex:1;--ac:var(--gold)}
.ol-pct{font:700 .68rem var(--f-ui);color:var(--muted);min-width:2.6em;text-align:right}
.ol-scroll{overflow:auto;padding:8px 8px 14px;scrollbar-width:thin;scrollbar-color:var(--line) transparent}
.ol-mod{border-radius:12px;margin-bottom:2px}
.ol-mod>summary{list-style:none;display:flex;align-items:center;gap:10px;padding:10px 10px;border-radius:12px;cursor:pointer;color:var(--ink)}
.ol-mod>summary::-webkit-details-marker{display:none}
.ol-mod>summary:hover{background:var(--surface-3)}
.ol-dot{flex:none;width:10px;height:10px;border-radius:50%;background:var(--ac);box-shadow:0 0 0 3px var(--ac-soft)}
.ol-mt{flex:1;min-width:0;font:700 .8rem/1.25 var(--f-ui)}
.ol-mt small{display:block;font:700 .6rem var(--f-ui);letter-spacing:.16em;text-transform:uppercase;color:var(--soft);margin-bottom:2px}
.ol-count{font:700 .66rem var(--f-ui);color:var(--soft);background:var(--surface-3);padding:3px 7px;border-radius:20px}
.ol-chev{color:var(--soft);transition:transform .2s}
.ol-mod[open]>summary .ol-chev{transform:rotate(180deg)}
.ol-list{list-style:none;margin:2px 0 8px;padding:0 0 0 10px;border-left:2px solid var(--line-2);margin-left:14px}
.ol-list a{display:flex;align-items:flex-start;gap:9px;padding:7px 10px;border-radius:10px;text-decoration:none;color:var(--ink-2);font-size:.9rem;line-height:1.3;position:relative}
.ol-list a:hover{background:var(--surface-3);color:var(--ink)}
.ol-n{flex:none;min-width:1.7em;font:700 .68rem/1.9 var(--f-ui);color:var(--soft);text-align:right}
.ol-t{flex:1;min-width:0}
.ol-ck{flex:none;width:18px;height:18px;border-radius:50%;background:var(--good);color:#fff;display:none;place-items:center;margin-top:2px}
.ol-list a.is-done .ol-ck{display:grid}
.ol-list a.is-done .ol-t{color:var(--muted)}
.ol-list a.is-current{background:var(--ac-soft);color:var(--ac-ink);font-weight:600}
.ol-list a.is-current .ol-n{color:var(--ac-ink)}
.ol-list a.is-current::before{content:"";position:absolute;left:-13px;top:50%;width:4px;height:60%;transform:translateY(-50%);border-radius:4px;background:var(--ac)}
.ol-toggle{display:none}

/* ---------------------------------------------------------------------------------------- rail */
.rail{position:sticky;top:calc(var(--topbar-h) + 18px);align-self:start}
.rail-in{display:flex;flex-direction:column;gap:14px;max-height:calc(100vh - var(--topbar-h) - 36px);overflow:auto;scrollbar-width:thin}
.rail-title{font:700 .64rem var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--soft)}
.rail-list{list-style:none;margin:0;padding:0 0 0 2px;border-left:2px solid var(--line)}
.rail-list a{display:flex;gap:9px;align-items:baseline;padding:6px 8px 6px 12px;margin-left:-2px;border-left:2px solid transparent;text-decoration:none;color:var(--muted);font-size:.86rem;line-height:1.3}
.rail-list a:hover{color:var(--ink)}
.rail-list a.is-active{color:var(--ac-ink);border-left-color:var(--ac);font-weight:600;background:linear-gradient(90deg,var(--ac-soft),transparent)}
.rl-n{flex:none;font:700 .62rem var(--f-ui);color:var(--soft);min-width:1em;text-align:center}
.rl-t{flex:1;min-width:0;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.rail-card{display:flex;flex-direction:column;gap:8px;padding:14px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
.rail-q{font:600 .76rem var(--f-ui);color:var(--muted)}
.rail-q span{display:block;margin-bottom:3px;font-size:.62rem;letter-spacing:.16em;text-transform:uppercase;color:var(--soft)}
.rail-q b{color:var(--ink);font-size:1rem}
.rail-q .bar{margin-top:7px}

/* ---------------------------------------------------------------------------------------- chapter hero */
.chapter-hero{position:relative;overflow:hidden;border-radius:var(--r-l);padding:clamp(20px,3.4vw,38px) clamp(20px,3.6vw,42px) clamp(24px,3.4vw,38px);margin-bottom:18px;color:#fff;
  background:linear-gradient(125deg,#0A1D3B 0%,#13305A 58%,color-mix(in srgb,var(--ac) 44%,#13305A) 135%);box-shadow:var(--shadow-3)}
.chapter-hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:4px;background:linear-gradient(90deg,var(--ac),var(--gold))}
.chapter-hero .hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center}
.hero-kick{display:flex;align-items:center;gap:12px;font:700 .68rem/1 var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:#C3D0E8}
.hero-kick::before{content:"";width:34px;height:2px;background:var(--gold);border-radius:2px;flex:none}
.hero-num{font:700 clamp(68px,10vw,112px)/.8 var(--f-disp);margin:.2em 0 .06em;background:linear-gradient(180deg,#F0D98F,#C9A84C 70%);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-variant-numeric:lining-nums}
.chapter-hero h1{font:700 clamp(30px,4.4vw,50px)/1.04 var(--f-disp);letter-spacing:-.005em;color:#fff;max-width:19em;margin-bottom:18px;text-wrap:balance}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.hero-meta span{display:inline-flex;align-items:center;gap:7px;font:600 .72rem/1 var(--f-ui);padding:.65em 1.05em;border-radius:30px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:#E6EDFA}
.hero-meta svg{color:var(--gold)}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px}
.hero-emblem{position:relative;width:clamp(110px,15vw,168px);aspect-ratio:1;display:grid;place-items:center;color:#fff}
.hero-emblem .disc{position:absolute;inset:0;border-radius:50%;background:radial-gradient(circle at 30% 25%,rgba(255,255,255,.2),rgba(255,255,255,.03));border:2px solid rgba(201,168,76,.55);box-shadow:0 0 60px -10px rgba(201,168,76,.4)}
.hero-emblem svg{position:relative;width:46%;height:46%}
[data-done="1"] .chapter-hero [data-action="complete"]{background:var(--good);color:#fff;box-shadow:none}

/* ---------------------------------------------------------------------------------------- section nav (mobile/tablet pills) */
.secnav{display:none;position:sticky;top:var(--topbar-h);z-index:30;margin:0 calc(-1 * clamp(14px,2.4vw,32px)) 14px;padding:10px clamp(14px,2.4vw,32px);background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line)}
.secnav-in{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.secnav-in::-webkit-scrollbar{display:none}
.secnav a{flex:none;padding:.55em 1em;border-radius:30px;border:1px solid var(--line);background:var(--surface);color:var(--ink-2);text-decoration:none;font:600 .74rem/1 var(--f-ui);white-space:nowrap}
.secnav a.is-active{background:var(--ac);border-color:var(--ac);color:#fff}

/* ---------------------------------------------------------------------------------------- sections */
.chapter-body{display:flex;flex-direction:column;gap:22px}
.sec{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:clamp(18px,3vw,30px);box-shadow:var(--shadow-1);min-width:0}
.sec-h{display:flex;align-items:center;gap:14px;margin-bottom:20px;position:relative}
.sec-ic{flex:none;width:46px;height:46px;border-radius:14px;background:var(--ac-soft);color:var(--ac-ink);display:grid;place-items:center;box-shadow:inset 0 0 0 1px var(--ac-line)}
.sec-t{min-width:0;flex:1}
.sec-kick{display:block;font:700 .64rem/1 var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--ac-ink);margin-bottom:5px}
.sec-h h2{font:700 clamp(22px,2.7vw,30px)/1.12 var(--f-disp);color:var(--ink);letter-spacing:-.003em;text-wrap:balance}
.sec-anchor{flex:none;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;color:var(--soft);opacity:0;transition:opacity .15s,background .15s;text-decoration:none}
.sec-h:hover .sec-anchor,.sec-anchor:focus{opacity:1}
.sec-anchor:hover{background:var(--surface-3);color:var(--ink)}
.sec-body{display:flex;flex-direction:column;gap:16px;min-width:0}
details.sec-answers>summary{list-style:none;cursor:pointer;margin:0}
details.sec-answers>summary::-webkit-details-marker{display:none}
details.sec-answers:not([open])>summary{margin-bottom:0}
details.sec-answers[open]>summary{margin-bottom:20px}
.sec-toggle{margin-left:auto;display:inline-flex;align-items:center;gap:8px;font:700 .72rem var(--f-ui);color:var(--ac-ink);padding:.6em 1em;border-radius:30px;background:var(--ac-soft);flex:none}
.sec-toggle .t-open{display:none}
details[open] .sec-toggle .t-open{display:inline}
details[open] .sec-toggle .t-closed{display:none}
.sec-toggle svg{transition:transform .2s}
details[open] .sec-toggle svg{transform:rotate(180deg)}
.sec-answers{background:var(--surface-2);border-style:dashed}
.callout-link{display:flex;align-items:center;gap:16px;padding:16px 20px;border-radius:var(--r);background:linear-gradient(120deg,var(--navy-4),var(--navy-2));color:#fff;text-decoration:none;box-shadow:var(--shadow-2)}
.callout-link>span{flex:none;width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.1);border:1.5px solid rgba(201,168,76,.6);color:var(--gold)}
.callout-link b{display:block;font:700 1rem var(--f-ui)}
.callout-link small{display:block;color:#B9C7E2;font-size:.9rem;margin-top:2px}
.callout-link>div{flex:1}
.callout-link:hover{filter:brightness(1.08);text-decoration:none}

/* ---------------------------------------------------------------------------------------- chapter end */
.chapter-end{display:flex;flex-direction:column;gap:18px;margin-top:26px}
.complete-card{display:flex;align-items:center;gap:20px;justify-content:space-between;flex-wrap:wrap;padding:22px 26px;border-radius:var(--r);background:linear-gradient(120deg,color-mix(in srgb,var(--gold) 14%,var(--surface)),var(--surface));border:1px solid color-mix(in srgb,var(--gold) 40%,var(--line))}
.complete-card h3{font:700 1.5rem/1.15 var(--f-disp)}
.complete-card p{color:var(--muted);margin-top:4px;max-width:34em}
[data-done="1"] .complete-card{background:linear-gradient(120deg,var(--good-t),var(--surface));border-color:color-mix(in srgb,var(--good) 40%,var(--line))}
[data-done="1"] .complete-card .btn{background:var(--good);color:#fff}
.notes-card{display:flex;flex-direction:column;gap:8px}
.notes-card label{display:flex;align-items:center;gap:8px;font:700 .74rem var(--f-ui);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.next-card{display:flex;align-items:center;gap:20px;padding:24px 28px;border-radius:var(--r-l);background:linear-gradient(125deg,#0A1D3B,#14305A);color:#fff;text-decoration:none;box-shadow:var(--shadow-2);position:relative;overflow:hidden;transition:transform .2s,box-shadow .2s}
.next-card::before{content:"";position:absolute;right:-60px;top:-70px;width:220px;height:220px;border-radius:50%;border:1.5px solid rgba(201,168,76,.28)}
a.next-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-3);text-decoration:none}
.next-card>div{flex:1;min-width:0;position:relative}
.next-card .nk{display:block;font:700 .66rem var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--gold);margin-bottom:8px}
.next-card b{display:block;font:700 clamp(22px,2.6vw,30px)/1.1 var(--f-disp);color:#fff}
.next-card p{color:#C7D3EA;margin-top:8px;font-size:.98rem}
.next-card .hi{color:#fff}
.next-card .go{flex:none;width:52px;height:52px;border-radius:50%;background:var(--gold);color:#0B2040;display:grid;place-items:center;position:relative}
.next-card.done{flex-wrap:wrap}
.pn-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.pn{display:flex;align-items:center;gap:14px;padding:16px 18px;border-radius:14px;border:1px solid var(--line);background:var(--surface);text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.pn:hover{border-color:var(--ac);transform:translateY(-1px);text-decoration:none}
.pn.next{justify-content:flex-end;text-align:right}
.pn small{display:block;font:700 .62rem var(--f-ui);letter-spacing:.16em;text-transform:uppercase;color:var(--soft)}
.pn b{display:block;font:600 .95rem/1.25 var(--f-body)}
.pn svg{color:var(--ac-ink);flex:none}
.scrim{position:fixed;inset:0;z-index:70;background:rgba(5,12,24,.5);backdrop-filter:blur(3px)}

/* ---------------------------------------------------------------------------------------- breakpoints */
@media (max-width:1320px){
  .reading{grid-template-columns:280px minmax(0,1fr)}
  .rail{display:none}
  .secnav{display:block}
}
@media (max-width:1019px){
  .reading{grid-template-columns:minmax(0,1fr);padding-top:14px}
  .outline{position:fixed;z-index:80;left:0;top:0;bottom:0;max-height:none;width:min(88vw,360px);border-radius:0 var(--r) var(--r) 0;transform:translateX(-105%);transition:transform .28s cubic-bezier(.2,.8,.2,1);box-shadow:var(--shadow-3);visibility:hidden}
  .outline.open{transform:none;visibility:visible}
  .ol-toggle{display:inline-flex;align-items:center;gap:8px;position:fixed;z-index:50;left:14px;bottom:calc(14px + env(safe-area-inset-bottom));padding:.85em 1.2em;border-radius:30px;border:0;
    background:var(--navy);color:#fff;font:700 .78rem var(--f-ui);box-shadow:var(--shadow-3)}
  :root[data-theme="dark"] .ol-toggle{background:var(--gold);color:#0B2040}
  .sec-anchor{display:none}
}
@media (max-width:640px){
  .chapter-hero .hero-grid{grid-template-columns:1fr}
  .hero-emblem{display:none}
  .pn-row{grid-template-columns:1fr}
  .next-card{padding:20px}
  .next-card .go{display:none}
  .complete-card .btn{width:100%}
  .sec{border-radius:14px}
  .sec-h{gap:12px}
  .sec-ic{width:40px;height:40px;border-radius:12px}
  .btn .lbl{display:inline}
}

/* closing "finish line" cards carry their own heading */
.sec-outro{background:none;border:0;box-shadow:none;padding:0}
.sec-outro>.sec-h{display:none}

.to-top{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom));z-index:40;width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink);
  box-shadow:var(--shadow-2);display:grid;place-items:center;opacity:0;pointer-events:none;transform:translateY(10px);transition:opacity .2s,transform .2s,background .15s}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{background:var(--surface-3)}

/* =====================================================================================================
   CONTENT — the books' components, re-themed for the web (scoped to .sec-body)
   ===================================================================================================== */
/* diagram plates keep the books' light palette in both themes */
.fig-body,.use .vis,.plate{
  --ink:#1D2736;--muted:#5E6A7E;--soft:#8A94A6;--line:#E7E2D5;--navy:#0D2545;--gold:#C9A84C;--gold-d:#9A7716;--gold-t:#FBF3DA;
  --good:#139B6A;--good-t:#E3F6EE;--good-d:#0B6E4B;--bad:#D8453C;--bad-t:#FDEBE9;--bad-d:#A3281F;--warn:#E8731A;
  --voiced:#C23A78;--voiced-t:#FCE7F0;--voiceless:#2A7FB8;--voiceless-t:#E2F0F9;--tongue:#F0868C;--air:#7DB6E8;
  color:#1D2736;background:#fff}
svg.tl text{font-family:"Mont",sans-serif}
.t-now{font-weight:800;font-size:10.5px;letter-spacing:.14em;fill:var(--gold-d)}
.t-ax{font-weight:700;font-size:9.5px;letter-spacing:.16em;fill:var(--soft)}
.t-lab{font-weight:700;font-size:11px;fill:var(--ac-dark)}
.t-in{font-weight:700;font-size:10.5px;fill:#fff}
.t-cap{font-weight:700;font-size:11px;fill:var(--ac-dark);letter-spacing:.04em}
.t-q{font-weight:800;font-size:24px;fill:var(--ac)}
svg.fg text{font-family:"Mont","SS3","NDev",sans-serif}
svg.fg .hi{font-family:"NDev",sans-serif}

/* inline glyphs */
.sec-body .arw{display:inline-block;width:1.05em;height:.62em;vertical-align:.02em;margin:0 .22em;color:var(--ac)}
.sec-body .blank{display:inline-block;min-width:3.2em;border-bottom:.09em solid var(--soft);height:.85em;vertical-align:baseline;margin:0 .12em}
.sec-body .xi{display:inline-block;width:.95em;height:.95em;vertical-align:-.12em;margin:0 .15em 0 .05em}
.sec-body .tn{display:inline-block;width:.92em;height:.92em;vertical-align:-.13em;margin:0 .06em}
.tn.rise{color:#E8731A}.tn.fall{color:#4C8DF0}
.stz{font-weight:700;color:var(--ac-ink);background:var(--ac-soft);border-radius:.16em;padding:0 .05em;font-style:normal}
.gb{opacity:.32}
.sec-body b,.sec-body strong{font-weight:700}
.sec-body .hi.hi{font-style:normal}

/* shared bits */
.lead{font-size:1.04em;color:var(--ink-2)}
.sec-body .lead{font-size:1.08rem;color:var(--ink-2)}
.sec-body .p,.sec-body .blk.p{color:var(--ink)}
.sub-head{display:flex;align-items:center;gap:.6em;margin-top:6px}
.sub-head h3,.subhead{margin:0;font:700 1.12rem/1.25 var(--f-disp);color:var(--ac-ink)}
.sub-head::before{content:"";flex:none;width:.5em;height:.5em;border-radius:.12em;transform:rotate(45deg);background:var(--gold)}
h3.subhead{margin-top:10px}
ul.blk.ex,ol.blk.ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.35em}
ul.blk.ex li,.use ul.ex li{position:relative;padding-left:1.25em;font-style:italic;color:var(--ink)}
ul.blk.ex li::before,.use ul.ex li::before{content:"";position:absolute;left:.15em;top:.6em;width:.42em;height:.42em;border-radius:50%;background:var(--ac)}
ol.blk.ol{counter-reset:n}
ol.blk.ol li{counter-increment:n;position:relative;padding-left:2.1em}
ol.blk.ol li::before{content:counter(n);position:absolute;left:0;top:.2em;width:1.5em;height:1.5em;border-radius:50%;background:var(--ac-soft);color:var(--ac-ink);font:700 .72em/1.5em var(--f-ui);text-align:center}

/* ---- quick look (grammar rows) */
.qrows{display:flex;flex-direction:column;gap:10px}
.qhead{display:grid;grid-template-columns:10em minmax(0,1fr);gap:16px;padding:0 16px;font:700 .6rem/1 var(--f-ui);letter-spacing:.18em;text-transform:uppercase;color:var(--soft)}
.qrow{display:grid;grid-template-columns:10em minmax(0,1fr);gap:16px;align-items:start;padding:14px 16px;background:var(--surface-2);border:1px solid var(--line-2);border-radius:14px}
.qtag{display:flex;align-items:center;justify-content:center;text-align:center;min-height:2.7em;padding:.55em .6em;border-radius:10px;font:700 .64rem/1.25 var(--f-ui);letter-spacing:.08em;text-transform:uppercase;
  background:var(--ac-soft);color:var(--ac-ink);overflow-wrap:break-word}
.qtag.aff{background:var(--good-t);color:var(--good-d)}
.qtag.neg{background:var(--bad-t);color:var(--bad-d)}
.qtag.que{background:color-mix(in srgb,#2F6FDE 13%,var(--surface));color:color-mix(in srgb,#2F6FDE 72%,var(--ink))}
.qbody{display:flex;flex-direction:column;gap:8px;min-width:0}
.chips{display:flex;flex-wrap:wrap;align-items:center;gap:.35em .28em}
.chp{--c:#6B7A99;display:inline-flex;align-items:baseline;gap:.3em;font:600 .86em/1.2 var(--f-ui);padding:.36em .75em;border-radius:.55em;background:color-mix(in srgb,var(--c) 13%,var(--surface));color:color-mix(in srgb,var(--c) 70%,var(--ink));
  box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--c) 18%,transparent)}
.chp small{font:500 .78em var(--f-body);opacity:.85}
.chp.sub{--c:#2F6FDE}.chp.aux{--c:#E8731A}.chp.not{--c:#D8453C}.chp.vrb{--c:#139B6A}.chp.prt{--c:#7C4DDB}
.plus{font:700 .9em var(--f-ui);color:var(--soft)}
.qex{display:flex;align-items:baseline;gap:.6em;font-style:italic;color:var(--ink);border-left:3px solid var(--gold);padding:.4em .9em .45em .8em;background:color-mix(in srgb,var(--gold) 9%,var(--surface));border-radius:0 .6em .6em 0}
.qex svg{flex:none;color:var(--gold-d);transform:translateY(.12em)}
.qtext{color:var(--ink)}
.rule-box{display:flex;gap:.9em;align-items:flex-start;padding:16px 20px;background:var(--gold-t);border:1px solid color-mix(in srgb,var(--gold) 45%,var(--surface));border-left:5px solid var(--gold);border-radius:14px}
.rule-box>.ic{flex:none;margin-top:.15em;color:var(--gold-d)}
.rule-box p{font-weight:700;color:var(--ink)}

/* ---- quick look (pronunciation cards) */
.qcards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.qcard{background:var(--surface-2);border:1px solid var(--line-2);border-top:4px solid var(--ac);border-radius:14px;padding:14px 16px 16px;display:flex;flex-direction:column;gap:10px}
.qh{display:flex;align-items:center;gap:10px}
.qi{flex:none;width:34px;height:34px;border-radius:50%;background:var(--ac-soft);color:var(--ac-ink);display:grid;place-items:center}
.ql{font:700 .68rem/1.25 var(--f-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--ink);min-width:0}
.qt{font-size:.96rem;line-height:1.5;color:var(--ink)}
.qt ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:6px}
.qt li{position:relative;padding-left:1em}
.qt li::before{content:"";position:absolute;left:.05em;top:.62em;width:.4em;height:.4em;border-radius:50%;background:var(--ac)}
.qt .hi{color:var(--ac-ink);font-weight:600}

/* ---- uses */
.grp{display:flex;flex-direction:column;gap:14px}
.use{display:grid;grid-template-columns:minmax(210px,290px) minmax(0,1fr);gap:20px;align-items:center;background:var(--surface-2);border:1px solid var(--line-2);border-radius:16px;padding:14px}
.use .vis{border-radius:12px;border:1px solid var(--line-2);padding:8px;min-width:0}
.use .vis svg{display:block;width:100%;height:auto}
.use .txt{min-width:0;padding-right:6px}
.use .tt{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.use .tt .n{font:700 .6rem/1 var(--f-ui);letter-spacing:.14em;text-transform:uppercase;color:var(--ac-ink);background:var(--ac-soft);padding:.6em 1em;border-radius:30px;white-space:nowrap}
.use .tt h3{font:700 1.18rem/1.2 var(--f-disp);color:var(--ink)}
.use .desc{color:var(--muted);margin:2px 0 8px}
.use ul.ex{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:6px}
.use ul.ex .hi,.qt .hi{font-weight:600}

/* listen buttons sit in a right-hand gutter on example lists */
.use ul.ex li[data-say],ul.blk.ex li[data-say]{padding-right:2.7em}
.use ul.ex li[data-say]>.say-btn,ul.blk.ex li[data-say]>.say-btn{position:absolute;right:0;top:-.05em;margin:0}

/* ---- hindi note */
.hnote{background:color-mix(in srgb,var(--gold) 10%,var(--surface));border:1px solid color-mix(in srgb,var(--gold) 38%,var(--surface));border-radius:16px;padding:18px 20px 20px}
.hnote .hh{display:flex;align-items:center;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.hnote .badge{flex:none;width:2.4em;height:2.4em;border-radius:50%;background:var(--navy);color:var(--gold);font:700 1.1em/1 "NDev",sans-serif;display:grid;place-items:center;padding-bottom:.14em}
.hnote .hh b{font:700 .78rem/1 var(--f-ui);letter-spacing:.08em;color:var(--ink);text-transform:uppercase}
.hnote .hh>.hi{font:600 .95rem/1 "NDev",sans-serif;color:var(--gold-d);margin-left:2px}
.hnote .hp{margin:8px 0;color:var(--ink)}
.hnote .pair{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:center;background:var(--surface);border:1px solid color-mix(in srgb,var(--gold) 28%,var(--line));border-radius:12px;padding:10px 14px;margin:8px 0}
.hnote .pair .a{color:var(--ink)}
.hnote .pair .b{font-weight:600;color:var(--ac-ink)}

/* ---- mistakes */
.mist{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--surface)}
.mist .mh,.mist .mr{display:grid;grid-template-columns:1fr 1fr 1.35fr}
.mist .mh{background:var(--navy);color:#fff;font:700 .64rem/1 var(--f-ui);letter-spacing:.16em;text-transform:uppercase}
.mist .mh>div{padding:14px 16px;display:flex;align-items:center;gap:8px}
.mist .mr{border-top:1px solid var(--line-2)}
.mist .mr>div{padding:12px 16px;display:flex;align-items:baseline;gap:9px;min-width:0}
.mist .w{background:color-mix(in srgb,var(--bad) 7%,var(--surface))}
.mist .r{background:color-mix(in srgb,var(--good) 7%,var(--surface))}
.mist .w .t{color:var(--bad-d)}
.mist .r .t{color:var(--good-d);font-weight:600}
.mist .y{color:var(--muted);font-size:.96em;align-items:center!important}
.mist .mr svg{flex:none;transform:translateY(.14em)}
.mist .w svg{color:var(--bad)}.mist .r svg{color:var(--good)}

/* ---- signals / rules */
.sig{background:var(--surface-2);border:1px solid var(--line-2);border-radius:16px;padding:16px 18px}
.sig .lead2{display:flex;align-items:center;gap:10px;color:var(--muted)}
.sig .lead2 svg{color:var(--ac)}
.sig .flow{display:flex;flex-wrap:wrap;gap:8px 7px;margin-top:12px;align-items:center}
.sig .gsep{width:.4em;height:.4em;border-radius:50%;background:var(--gold);margin:0 .3em}
.sig .chip{font:600 .92em/1.25 var(--f-body);background:var(--ac-soft);color:var(--ac-ink);border:1px solid var(--ac-line);padding:.3em .95em;border-radius:30px}
.sig .sigrow{flex:1 0 100%;display:flex;gap:.5em;align-items:baseline;padding:2px 0;color:var(--ink)}
.sig .sigrow svg{flex:none;color:var(--ac);transform:translateY(.18em)}
.rls{display:grid;gap:4px 22px;margin-top:12px}
.rls.c2{grid-template-columns:1fr 1fr}.rls.c1{grid-template-columns:1fr}
.rls .rl{display:flex;gap:11px;align-items:flex-start;padding:5px 0}
.rls .rl .ck{flex:none;width:1.55em;height:1.55em;border-radius:50%;background:var(--good-t);color:var(--good-d);display:grid;place-items:center;margin-top:.1em}
.anote{display:flex;gap:10px;align-items:flex-start;background:var(--ac-soft);border-radius:10px;padding:10px 14px;color:var(--ink)}
.anote svg{flex:none;color:var(--ac-ink);margin-top:.15em}

/* ---- generic table */
.tbl{border:1px solid var(--line);border-radius:14px;overflow-x:auto;background:var(--surface);-webkit-overflow-scrolling:touch}
.tbl table{width:100%;border-collapse:collapse;font-size:.96em;min-width:520px}
.tbl th{background:var(--navy);color:#fff;font:700 .66rem/1.2 var(--f-ui);letter-spacing:.12em;text-transform:uppercase;text-align:left;padding:13px 16px;white-space:nowrap}
.tbl td{padding:10px 16px;border-top:1px solid var(--line-2);vertical-align:middle}
.tbl tr:nth-child(even) td{background:var(--surface-2)}
.tbl td:first-child{font-weight:600;color:var(--ink)}

/* ---- answer key (static) */
.pset{display:flex;flex-direction:column;gap:8px}
.pset+.pset{margin-top:12px}
.pset-h{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.pset-h .tag{font:700 .62rem/1 var(--f-ui);letter-spacing:.14em;color:#fff;background:var(--ac);padding:.65em 1.05em;border-radius:8px;text-transform:uppercase;white-space:nowrap}
.a-set .pset-h .tag{background:var(--good)}
.pset-h h3{font:700 1.05rem/1.25 var(--f-ui);color:var(--ink)}
.pset-h .cnt{margin-left:auto;font:600 .66rem var(--f-ui);color:var(--muted);letter-spacing:.06em}
.pset .intro{color:var(--muted);font-style:italic}
.qgrid{display:grid;grid-template-columns:1fr 1fr;column-gap:26px}
.qgrid.one{grid-template-columns:1fr}.qgrid.three{grid-template-columns:repeat(3,1fr)}
.q{display:grid;grid-template-columns:2em 1fr;gap:10px;padding:7px 2px;border-bottom:1px dashed var(--line);align-items:baseline}
.q .no{font:700 .66rem/1 var(--f-ui);color:var(--ac-ink);background:var(--ac-soft);border-radius:50%;width:2.15em;height:2.15em;display:grid;place-items:center;transform:translateY(.15em)}
.a-set .q .no{background:var(--good-t);color:var(--good-d)}
.q .why{color:var(--muted);font-size:.94em}

/* ---- figures */
.fig{margin:0;border:1px solid var(--line);border-radius:16px;background:var(--surface-2);padding:14px 14px 12px}
.fig.bare{padding:0;border:0;background:none}
.fig-h{display:flex;align-items:center;gap:10px;color:var(--ac-ink);margin-bottom:10px}
.fig-h b{font:700 .72rem/1.2 var(--f-ui);letter-spacing:.12em;text-transform:uppercase;color:var(--ink)}
.fig-body{border-radius:12px;padding:8px;border:1px solid var(--line-2);overflow:hidden}
.fig-body svg{display:block;width:100%;height:auto}
.fig figcaption{margin-top:10px;color:var(--muted);font-size:.95rem;font-style:italic;text-align:center}
.fig.bare .fig-body{padding:0;border:0;background:none}

/* ---- tables of verbs / words (chapter pages + tools) */
.vtable{border:1px solid var(--line);border-radius:14px;overflow:auto;background:var(--surface);-webkit-overflow-scrolling:touch}
.vtable table{width:100%;border-collapse:collapse;min-width:480px}
.vtable thead th{background:var(--navy);color:#fff;font:700 .66rem/1.1 var(--f-ui);letter-spacing:.12em;text-transform:uppercase;text-align:left;padding:13px 16px;position:sticky;top:0;z-index:2;white-space:nowrap}
.vtable thead th small{font-weight:500;opacity:.7;letter-spacing:.04em;text-transform:none;margin-left:3px}
.vtable thead th.bad{color:#FFA39B}.vtable thead th.good{color:#7BE3B8}
.vtable td{padding:9px 16px;border-top:1px solid var(--line-2);vertical-align:middle}
.vtable tbody tr:nth-child(even) td{background:var(--surface-2)}
.vtable tbody tr:hover td{background:var(--ac-soft)}
.vtable td.v1,.vtable td.w-word,.vtable td.w-n{font-weight:700;color:var(--ink)}
.vtable td.v2{color:var(--ac-ink);font-weight:600}
.vtable td.v3{color:var(--good-d);font-weight:600}
.vtable td.vm{color:var(--muted)}
.vtable td.w-n{color:var(--soft);font:700 .72rem var(--f-ui);width:2.6em}
.vtable td.w-bad{color:var(--bad-d)}
.vtable td.w-good{color:var(--good-d);font-weight:600}
.vtable td.v1 b,.vtable td.w-word b{font-weight:700}
.vtable td>.say-btn.inline{margin-right:8px}
.wtab-tools{margin-bottom:12px}
.wtab.hide-right [data-reveal],.vtable.test [data-reveal]{filter:blur(7px);cursor:pointer;user-select:none;transition:filter .2s}
.wtab.hide-right [data-reveal].revealed,.vtable.test [data-reveal].revealed{filter:none}
.dzs{display:flex;flex-direction:column;gap:10px}
.dz{display:grid;grid-template-columns:2.2em 1fr;gap:12px;align-items:start;background:var(--surface-2);border:1px solid var(--line-2);border-radius:14px;padding:12px 16px}
.dz-n{width:2em;height:2em;border-radius:50%;background:var(--ac);color:#fff;font:700 .78rem/2em var(--f-ui);text-align:center}
.family-note{color:var(--muted);font-style:italic}

/* ---- pronunciation specials */
.mpt{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.mpt .mpr{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.mpt .mpr.hdr{background:var(--navy);color:#fff}
.mph{display:grid;grid-template-columns:1fr 2.2em 1fr;align-items:center;padding:13px 16px;font:700 .62rem/1 var(--f-ui);letter-spacing:.14em;text-transform:uppercase}
.mph .mid{display:flex;justify-content:center;opacity:.85}
.mph span:last-child{text-align:right}
.mpt .mp{display:grid;grid-template-columns:minmax(0,1fr) 2.2em minmax(0,1fr);align-items:center;padding:7px 16px}
.mpt .mp .s,.mpt .mp .l{display:flex;flex-direction:column;line-height:1.22;min-width:0}
.mpt .mp .l{text-align:right;align-items:flex-end}
.mpt .mp .w{font-weight:700;color:var(--ink)}
.mpt .mp .l .w{color:var(--ac-ink)}
.mpt .mp .d{font-size:.97em;color:var(--ink-2)}
.mpt .mp .bars{display:flex;flex-direction:column;align-items:center;gap:4px}
.mpt .mp .bars i{display:block;height:4px;border-radius:3px}
.mpt .mp .bars .bs{width:.6em;background:var(--gold)}
.mpt .mp .bars .bl{width:1.5em;background:var(--ac)}
.mpt .mpr.row{border-top:1px solid var(--line-2)}
.mpt .mpr.row:nth-child(even){background:var(--surface-2)}
.mpt .mpr>div:first-child{border-right:1px solid var(--line)}
.mpt .mpr.hdr>div:first-child{border-right:1px solid rgba(255,255,255,.25)}
.abc{background:var(--surface-2);border:1px solid var(--line-2);border-radius:14px;padding:14px 16px 16px}
.abh{display:flex;gap:18px;margin:0 0 12px;font:700 .62rem/1 var(--f-ui);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.abh span{display:flex;align-items:center;gap:8px}
.abh i{display:block;width:26px;height:5px;border-radius:3px}
.abh .k1{background:var(--ink-2)}.abh .k2{background:var(--gold)}
.abg{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.abc .ab{display:grid;grid-template-columns:2.1em minmax(0,1fr);grid-template-rows:auto auto;column-gap:10px;align-items:center;background:var(--surface);border:1px solid var(--line-2);border-radius:10px;padding:7px 10px}
.abc .ab .L{grid-row:1/3;width:2em;height:2em;border-radius:8px;background:var(--ac);color:#fff;font:800 1em/2em var(--f-ui);text-align:center}
.abc .ab .n{font:700 .8rem/1.2 var(--f-ui);color:var(--ink);white-space:nowrap}
.abc .ab .d{font-size:.84rem;color:var(--gold-d);font-weight:600;line-height:1.2;white-space:nowrap}
.tip,.notation{display:flex;gap:12px;align-items:flex-start;border-radius:12px;padding:12px 16px}
.tip{background:var(--gold-t);border:1px solid color-mix(in srgb,var(--gold) 42%,var(--surface));border-left:5px solid var(--gold)}
.tip>.ic{flex:none;color:var(--gold-d);margin-top:.12em}
.tip p{font-weight:600;color:var(--ink)}
.notation{background:var(--ac-soft);border:1px solid var(--ac-line)}
.notation>.ic{flex:none;color:var(--ac-ink);margin-top:.12em}
.notation p{color:var(--ink);font-weight:600}
.blk.p.it,.plan-after,.plan-note.after{font-style:italic;color:var(--muted)}
.plan-note{color:var(--ink-2)}
.script{margin:0;display:block;padding:16px 20px;border-radius:12px;background:var(--gold-t);border:1px solid color-mix(in srgb,var(--gold) 42%,var(--surface));border-left:5px solid var(--gold);font-weight:600;font-style:italic;color:var(--ink);position:relative}
.cheat{display:flex;flex-direction:column;gap:8px}
.cheat-row{display:grid;grid-template-columns:4.2em minmax(0,1fr) auto;gap:14px;align-items:center;background:var(--surface-2);border:1px solid var(--line-2);border-radius:12px;padding:8px 14px 8px 8px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.cheat-row:hover{border-color:var(--ac);transform:translateX(2px);text-decoration:none}
.cheat-row .cn{height:2.7em;border-radius:9px;font:700 .62rem/1 var(--f-ui);text-transform:uppercase;letter-spacing:.1em;display:flex;align-items:center;justify-content:center;gap:5px;background:color-mix(in srgb,#2F6FDE 13%,var(--surface));color:color-mix(in srgb,#2F6FDE 70%,var(--ink))}
.cheat-row .cn b{font:800 1.5em/1 var(--f-ui);letter-spacing:0}
.cheat-row .cn.p2{background:color-mix(in srgb,#7C4DDB 13%,var(--surface));color:color-mix(in srgb,#7C4DDB 70%,var(--ink))}
.cheat-row .cn.p3{background:color-mix(in srgb,#E8731A 14%,var(--surface));color:color-mix(in srgb,#E8731A 72%,var(--ink))}
.cheat-t b{display:block;font:700 .95rem/1.25 var(--f-ui);color:var(--ink)}
.cheat-t span{color:var(--ink-2);font-size:.97em}
.cheat-row .chev{width:1.2em;height:1.2em;color:var(--soft)}
.plan,.phases{display:flex;flex-direction:column;gap:10px;list-style:none;margin:0;padding:0}
.plan-row{display:grid;grid-template-columns:5em minmax(0,1fr);gap:14px;align-items:center;background:var(--surface-2);border:1px solid var(--line-2);border-radius:12px;padding:8px 16px 8px 8px}
.plan-d,.ph-d{display:flex;flex-direction:column;align-items:center;justify-content:center;border-radius:9px;background:var(--ac);color:#fff;font:800 1.1em/1 var(--f-ui);padding:.65em .3em;align-self:stretch;min-height:3.4em}
.plan-d small,.ph-d small{font:700 .5rem/1 var(--f-ui);letter-spacing:.2em;text-transform:uppercase;opacity:.85;margin-bottom:.35em}
.plan-row b{display:block;font:700 .96rem/1.25 var(--f-ui);color:var(--ink)}
.plan-row p{margin:.12em 0 0;color:var(--muted);font-size:.97em}
.cta-line{margin:2px 0}
ol.scorecard{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
ol.scorecard li{border-bottom:1px dashed var(--line)}
ol.scorecard label{display:grid;grid-template-columns:1.4em 2em minmax(0,1fr);gap:10px;align-items:baseline;padding:9px 4px;cursor:pointer}
ol.scorecard label:hover{background:var(--ac-soft)}
.sc-n{font:700 .68rem/1 var(--f-ui);color:var(--ac-ink)}
.sc-total{font:600 .86rem var(--f-ui);color:var(--muted);text-align:right}
.sc-total b{color:var(--ac-ink);font-size:1.3em}
.finale{position:relative;background:linear-gradient(125deg,#0A1D3B,#14305A);color:#E9EFFA;border-radius:18px;padding:24px 26px 26px;overflow:hidden}
.finale::before{content:"";position:absolute;right:-60px;top:-80px;width:230px;height:230px;border-radius:50%;border:1.5px solid rgba(201,168,76,.28)}
.finale .fh{position:relative;display:flex;gap:16px;align-items:center}
.finale .trp{flex:none;width:62px;height:62px;border-radius:50%;background:rgba(255,255,255,.08);border:1.5px solid rgba(201,168,76,.65);display:grid;place-items:center;color:var(--gold)}
.finale .k{font:700 .64rem/1 var(--f-ui);letter-spacing:.22em;text-transform:uppercase;color:var(--gold)}
.finale h2{margin:.4em 0 0;font:700 2rem/1 var(--f-disp);color:#fff}
.finale p{margin:.9em 0 0;position:relative}
.finale .fk{margin:1.2em 0 .2em;font:700 .64rem/1 var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--gold)}
.ocs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:8px;position:relative}
.finale .oc{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:12px 14px 14px}
.finale .oc .pt{font:800 .58rem/1 var(--f-ui);letter-spacing:.16em;text-transform:uppercase;color:var(--gold)}
.finale .oc b{display:block;font:700 .95rem/1.2 var(--f-ui);color:#fff;margin:.4em 0 .3em}
.finale .oc p{margin:0;font-size:.88rem;color:#C8D4EA;line-height:1.4}
.finale .fc{position:relative;margin-top:1.1em;padding-top:.9em;border-top:1px solid rgba(201,168,76,.4);color:var(--gold);font-weight:700;font-style:italic}
.finale .fc .hi{font-style:normal}
.finale .stz,.next-card .stz{color:#fff;background:rgba(255,255,255,.18)}
.rulecard{background:var(--surface-2);border:1px solid var(--line-2);border-radius:16px;padding:14px 18px 18px;display:flex;flex-direction:column;gap:10px}
.rh{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.rh .rn{flex:none;font:800 .6rem/1 var(--f-ui);letter-spacing:.14em;text-transform:uppercase;color:#fff;background:var(--ac);border-radius:8px;padding:.75em 1.05em}
.rh .rn.pr{background:var(--gold-d)}
.rh h3{font:700 1.15rem/1.25 var(--f-disp);color:var(--ink)}
.rp{color:var(--ink)}
.cmp{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface)}
.cmp .cr{display:grid;grid-template-columns:1fr 1fr}
.cmp .cr.hdr>div{font:700 .62rem/1.25 var(--f-ui);letter-spacing:.08em;text-transform:uppercase;color:#fff;padding:12px 14px}
.cmp .cr.hdr .c0{background:var(--navy)}.cmp .cr.hdr .c1{background:var(--ac-dark)}
.cmp .cr.row>div{padding:8px 14px;border-top:1px solid var(--line-2)}
.cmp .cr.row>div.c0{border-right:1px solid var(--line-2)}
.cmp .cr.row:nth-child(even){background:var(--surface-2)}
.rol{margin:0;padding:0;list-style:none;counter-reset:r;display:flex;flex-direction:column;gap:6px}
.rol li{counter-increment:r;position:relative;padding-left:2.1em}
.rol li::before{content:counter(r);position:absolute;left:0;top:.2em;width:1.5em;height:1.5em;border-radius:50%;background:var(--ac-soft);color:var(--ac-ink);font:700 .72em/1.5em var(--f-ui);text-align:center}
.lsn,.etq{display:flex;flex-direction:column;gap:8px}
.lsn .ls{display:grid;grid-template-columns:4.6em minmax(0,1fr);gap:14px;align-items:center;background:var(--surface-2);border:1px solid var(--line-2);border-radius:12px;padding:8px 16px 8px 8px}
.lsn .ls .mn{display:flex;flex-direction:column;align-items:center;background:var(--ac-soft);color:var(--ac-ink);border-radius:9px;padding:.6em .2em;font:800 1em/1 var(--f-ui);align-self:stretch;justify-content:center}
.lsn .ls .mn small{font:700 .5rem/1 var(--f-ui);letter-spacing:.2em;text-transform:uppercase;opacity:.8;margin-top:.4em}
.lsn .ls b{display:block;font:700 .96rem/1.25 var(--f-ui)}
.lsn .ls p{margin:.12em 0 0;color:var(--muted)}
.etq .et{display:grid;grid-template-columns:2em minmax(0,1fr);gap:12px;align-items:start;background:var(--surface-2);border:1px solid var(--line-2);border-radius:12px;padding:10px 16px}
.etq .et .n{width:1.8em;height:1.8em;border-radius:50%;background:var(--ac);color:#fff;font:700 .72rem/1.8em var(--f-ui);text-align:center;margin-top:.12em}
.endcap{display:flex;gap:16px;align-items:center;background:linear-gradient(125deg,#0A1D3B,#14305A);color:#fff;border-radius:16px;padding:18px 24px}
.endcap>.ic{flex:none;color:var(--gold)}
.endcap .tx{font-weight:700;font-style:italic;color:#F1E6C0}

/* ---- responsive content */
@media (max-width:900px){
  .use{grid-template-columns:1fr;gap:14px}
  .use .vis{max-width:420px}
  .qcards{grid-template-columns:1fr}
  .ocs{grid-template-columns:1fr}
  .qgrid,.qgrid.three{grid-template-columns:1fr}
  .rls.c2{grid-template-columns:1fr}
}
@media (max-width:720px){
  .qhead{display:none}
  .qrow{grid-template-columns:1fr;gap:10px}
  .qtag{justify-content:flex-start;text-align:left;min-height:0;padding:.5em .8em;width:fit-content}
  .mist .mh{display:none}
  .mist .mr{grid-template-columns:1fr}
  .mist .mr>div{padding:10px 14px}
  .mist .mr>div.y{border-top:1px dashed var(--line);font-size:.95em}
  .hnote .pair{grid-template-columns:1fr;gap:4px}
  .hnote .pair .arw{transform:rotate(90deg);margin:0}
  .mpt .mpr{grid-template-columns:1fr}
  .mpt .mpr>div:first-child{border-right:0;border-bottom:1px solid var(--line-2)}
  .mpt .mpr.hdr>div+div{display:none}
  .cmp .cr{grid-template-columns:1fr}
  .cmp .cr.row>div.c0{border-right:0;border-bottom:0;font-weight:600;background:var(--ac-soft)}
  .cmp .cr.hdr .c1{display:none}
  .cheat-row{grid-template-columns:3.6em minmax(0,1fr)}
  .cheat-row .chev{display:none}
  .plan-row{grid-template-columns:4.2em minmax(0,1fr)}
}

/* =====================================================================================================
   COMPONENTS — practice widget, listen buttons, search palette, settings, toast, chips, flashcards
   ===================================================================================================== */

/* ---------------------------------------------------------------------------------------- listen buttons */
.say-btn{display:inline-grid;place-items:center;width:1.95em;height:1.95em;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ac-ink,var(--ink-2));
  margin-left:.55em;vertical-align:middle;padding:0;flex:none;transition:background .15s,border-color .15s,color .15s,transform .15s;line-height:1}
.say-btn:hover{background:var(--ac-soft,var(--surface-3));border-color:var(--ac-line,var(--soft));transform:scale(1.06)}
.say-btn.inline{margin-left:0;margin-right:.5em;width:1.8em;height:1.8em}
.say-btn.is-playing{background:var(--ac,var(--navy));color:#fff;border-color:transparent;animation:pulse 1.1s ease-in-out infinite}
.say-btn svg{pointer-events:none}
.say-demo{display:inline-grid;place-items:center;width:1.8em;height:1.8em;border-radius:50%;border:1px solid var(--line);vertical-align:middle;color:var(--ac-ink)}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 color-mix(in srgb,var(--ac,#2F6FDE) 45%,transparent)}50%{box-shadow:0 0 0 7px transparent}}
.nospeech .say-btn{display:none}

/* ---------------------------------------------------------------------------------------- practice widget */
.pw{border:1px solid var(--line);border-radius:16px;background:var(--surface-2);overflow:hidden}
.pw+.pw{margin-top:4px}
.pw-h{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:14px 18px;background:var(--surface);border-bottom:1px solid var(--line)}
.pw-tag{font:700 .62rem/1 var(--f-ui);letter-spacing:.14em;text-transform:uppercase;background:var(--ac);color:#fff;padding:.7em 1.05em;border-radius:8px;white-space:nowrap}
.pw-h h3{font:700 1rem/1.3 var(--f-ui);color:var(--ink);flex:1 1 200px;min-width:0}
.pw-meta{display:flex;align-items:center;gap:10px;margin-left:auto}
.pw-score{font:700 .76rem var(--f-ui);padding:.5em .95em;border-radius:20px;background:var(--surface-3);color:var(--muted);min-width:4.8em;text-align:center;transition:all .25s}
.pw-score.full{background:var(--good-t);color:var(--good-d)}
.pw-intro{padding:12px 18px 0;color:var(--muted);font-style:italic}
.pqs{list-style:none;margin:0;padding:4px 0 6px}
.pq{padding:14px 18px;border-top:1px solid var(--line-2);position:relative;transition:background .25s}
.pqs .pq:first-child{border-top:0}
.pq-q{display:flex;gap:12px;align-items:flex-start}
.pq-n{flex:none;width:30px;height:30px;border-radius:50%;background:var(--ac-soft);color:var(--ac-ink);font:700 .72rem/30px var(--f-ui);text-align:center;margin-top:.1em;transition:all .25s}
.pq-t{flex:1;min-width:0;font-size:1.04rem}
.pq-t .say-btn{margin-left:.7em}
.pq-ctl{display:flex;gap:8px;margin:11px 0 0 42px;flex-wrap:wrap;align-items:stretch}
.pq-in{flex:1 1 230px;min-width:0;border:1.5px solid var(--line);border-radius:11px;padding:.6em .85em;background:var(--surface);color:var(--ink);font:inherit;font-size:1rem;transition:border-color .15s,box-shadow .15s}
textarea.pq-in{resize:vertical;min-height:3.4em}
.pq-ctl.wide .pq-in{flex-basis:100%}
.pq-in:focus{outline:none;border-color:var(--ac);box-shadow:var(--focus)}
.pq.is-ok{background:color-mix(in srgb,var(--good) 5%,var(--surface-2))}
.pq.is-ok .pq-n{background:var(--good);color:#fff}
.pq.is-miss .pq-n{background:var(--warn);color:#fff}
.pq.is-ok .pq-in,.pq.is-miss .pq-in{border-color:transparent;background:var(--surface-3)}
.pq.shake .pq-in{animation:shake .35s}
@keyframes shake{20%,60%{transform:translateX(-5px)}40%,80%{transform:translateX(5px)}}
.pq-fb{margin:12px 0 0 42px;display:flex;flex-direction:column;gap:10px}
.pq-verdict{font:700 .8rem/1.3 var(--f-ui);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.pq-verdict.v-ok{color:var(--good-d)}.pq-verdict.v-no{color:var(--bad-d)}.pq-verdict.v-cmp{color:var(--ac-ink)}
.pq-verdict .you{font:500 .95rem var(--f-body);color:var(--muted);font-style:italic}
.pq-official{display:flex;gap:12px;align-items:flex-start;background:var(--surface);border:1px dashed var(--ac-line);border-radius:12px;padding:11px 14px}
.pq-lab{flex:none;font:700 .58rem/1 var(--f-ui);letter-spacing:.16em;text-transform:uppercase;color:var(--good-d);background:var(--good-t);padding:.55em .8em;border-radius:6px;margin-top:.15em}
.pq-official>div{min-width:0;font-size:1rem}
.pq-self{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font:600 .8rem var(--f-ui);color:var(--muted)}
.pq-self>span{margin-right:4px}
.pw-note{padding:12px 18px 4px}
.pw-note-body{margin-top:10px;padding:12px 14px;background:var(--surface);border:1px dashed var(--ac-line);border-radius:12px}
.pq[data-mode="note"] .pq-ctl .btn[aria-pressed="true"]{background:var(--good);border-color:var(--good);color:#fff}
.pw[data-demo] .pw-reset{display:inline-flex}

/* ---------------------------------------------------------------------------------------- filter chips (tools & course pages) */
.cc-tools .chip,.tool-bar .chip{display:inline-flex;align-items:center;gap:7px;padding:.6em 1.05em;border-radius:30px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink-2);font:600 .76rem/1 var(--f-ui);white-space:nowrap;transition:all .15s}
.cc-tools .chip:hover,.tool-bar .chip:hover{border-color:var(--soft);color:var(--ink)}
.cc-tools .chip.is-on,.tool-bar .chip.is-on{background:var(--navy);border-color:var(--navy);color:#fff}
:root[data-theme="dark"] .cc-tools .chip.is-on,:root[data-theme="dark"] .tool-bar .chip.is-on{background:var(--gold);border-color:var(--gold);color:#0B2040}
.chip small{font-weight:700;opacity:.65}
.chips.fl{display:flex;flex-wrap:wrap;gap:8px}

/* ---------------------------------------------------------------------------------------- search palette */
.cmdk{position:fixed;inset:0;z-index:110;display:flex;align-items:flex-start;justify-content:center;padding:min(11vh,110px) 14px 14px;background:rgba(5,12,24,.58);backdrop-filter:blur(7px);animation:fade .15s}
.cmdk-box{width:min(740px,100%);max-height:min(76vh,680px);display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:22px;box-shadow:0 40px 100px -20px rgba(0,0,0,.6);overflow:hidden;animation:pop .2s cubic-bezier(.2,.8,.2,1)}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.985)}to{opacity:1;transform:none}}
.cmdk-in{display:flex;align-items:center;gap:12px;padding:0 20px;border-bottom:1px solid var(--line);color:var(--soft)}
.cmdk-in input{flex:1;min-width:0;border:0;background:transparent;font:500 1.15rem var(--f-body);padding:20px 0;outline:none;color:var(--ink)}
.cmdk-in input::placeholder{color:var(--soft)}
.cmdk-x{border:0;background:var(--surface-3);color:var(--muted);border-radius:8px;padding:.45em .7em;font:700 .66rem var(--f-ui)}
.cmdk-list{overflow:auto;padding:8px 8px 10px;scrollbar-width:thin;overscroll-behavior:contain}
.cmdk-sec{font:700 .62rem var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--soft);padding:12px 12px 6px}
.cmdk-item{display:flex;gap:13px;align-items:flex-start;padding:10px 12px;border-radius:12px;text-decoration:none;color:var(--ink);cursor:pointer}
.cmdk-item:hover{text-decoration:none}
.cmdk-item[aria-selected="true"]{background:var(--surface-3)}
.cmdk-dot{flex:none;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:color-mix(in srgb,var(--c,#2F6FDE) 14%,var(--surface));color:var(--c,#2F6FDE)}
.cmdk-dot svg{width:18px;height:18px}
.cmdk-b{min-width:0;flex:1}
.cmdk-t{font:600 .98rem/1.3 var(--f-body);color:var(--ink)}
.cmdk-m{font:600 .66rem/1.3 var(--f-ui);color:var(--soft);letter-spacing:.04em;margin-top:2px}
.cmdk-s{font-size:.9rem;line-height:1.45;color:var(--muted);margin-top:3px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.cmdk-item mark{background:color-mix(in srgb,var(--gold) 42%,transparent);color:inherit;border-radius:3px;padding:0 1px}
.cmdk-empty{padding:38px 20px;text-align:center;color:var(--muted)}
.cmdk-foot{display:flex;gap:18px;padding:10px 18px;border-top:1px solid var(--line);font-size:.78rem;color:var(--soft);background:var(--surface-2)}
.cmdk-foot span{display:inline-flex;align-items:center;gap:6px}

/* ---------------------------------------------------------------------------------------- settings popover */
.pop{position:fixed;z-index:105;top:calc(var(--topbar-h) + 8px);right:clamp(10px,2.4vw,28px);width:min(372px,calc(100vw - 20px));background:var(--surface);border:1px solid var(--line);border-radius:20px;
  box-shadow:var(--shadow-3);padding:18px 18px 20px;animation:pop .18s ease;max-height:calc(100vh - var(--topbar-h) - 24px);overflow:auto}
.pop-h{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.pop-h h3{font:700 1.25rem var(--f-disp)}
.pop-row{margin-top:18px}
.pop-row>label,.pop-row>.lab{display:flex;align-items:baseline;justify-content:space-between;font:700 .66rem var(--f-ui);letter-spacing:.16em;text-transform:uppercase;color:var(--soft);margin-bottom:8px}
.pop-row .val{font:600 .78rem var(--f-ui);color:var(--ink-2);letter-spacing:0;text-transform:none}
.pop .seg{display:flex}
.pop .seg button{flex:1}
.pop input[type="range"]{width:100%;accent-color:var(--gold-d)}
.pop-note{font-size:.8rem;color:var(--soft);margin-top:8px;line-height:1.4}

/* ---------------------------------------------------------------------------------------- toast */
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom));transform:translateX(-50%) translateY(20px);z-index:130;background:var(--navy);color:#fff;padding:.85em 1.3em;border-radius:14px;
  font:600 .84rem var(--f-ui);box-shadow:var(--shadow-3);opacity:0;pointer-events:none;transition:all .25s;max-width:calc(100vw - 32px);display:flex;gap:10px;align-items:center}
.toast.show{opacity:1;transform:translateX(-50%)}
.toast svg{color:var(--gold)}
:root[data-theme="dark"] .toast{background:#E9EEF8;color:#0B2040}

/* ---------------------------------------------------------------------------------------- flashcards */
.vcards{max-width:640px;margin:8px auto 0;display:flex;flex-direction:column;gap:18px;align-items:stretch}
.fc-stage{perspective:1200px}
.fc-card{position:relative;display:block;width:100%;min-height:300px;border:0;background:none;padding:0;text-align:center;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.2,.8,.2,1)}
.fc-card.flip{transform:rotateY(180deg)}
.fc-front,.fc-back{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:24px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:24px;box-shadow:var(--shadow-3)}
.fc-front{background:linear-gradient(135deg,#0A1D3B,#14305A);color:#fff;border:1px solid rgba(201,168,76,.35)}
.fc-back{background:var(--surface);border:1px solid var(--line);transform:rotateY(180deg);color:var(--ink)}
.fc-front small,.fc-back small{font:700 .66rem var(--f-ui);letter-spacing:.22em;text-transform:uppercase;color:var(--gold)}
.fc-back small{color:var(--gold-d)}
.fc-front b{font:700 clamp(40px,9vw,64px)/1 var(--f-disp);color:#fff}
.fc-front em{font:500 1.35rem "NDev",sans-serif;font-style:normal;color:#E6D79F}
.fc-back b{font:700 clamp(32px,7vw,48px)/1.1 var(--f-disp)}
.fc-back b:nth-of-type(1){color:var(--ac-ink,#2F6FDE)}
.fc-back b:nth-of-type(2){color:var(--good-d)}
.fc-hint{font:600 .7rem var(--f-ui);letter-spacing:.1em;color:var(--soft);margin-top:12px;opacity:.8}
.fc-front .fc-hint{color:#9FB0CE}
.fc-ctl{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.fc-sub{display:flex;align-items:center;justify-content:space-between;font:700 .78rem var(--f-ui);color:var(--muted)}
@media (max-width:640px){.fc-card{min-height:260px}}

/* =====================================================================================================
   PAGES — home, course overview, tools, plan, quiz, progress, guide
   ===================================================================================================== */
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.hero-stats{display:grid;grid-template-columns:repeat(4,auto);justify-content:start;gap:16px clamp(20px,3vw,44px);list-style:none;margin:34px 0 0;padding:24px 0 0;border-top:1px solid rgba(255,255,255,.14)}
.hero-stats li{display:flex;flex-direction:column;gap:6px}
.hero-stats b{font:700 clamp(30px,3.6vw,44px)/1 var(--f-disp);color:var(--gold-2);font-variant-numeric:lining-nums}
.hero-stats span{font:700 .64rem/1.2 var(--f-ui);letter-spacing:.16em;text-transform:uppercase;color:#A9B8D3}

/* ---------------------------------------------------------------------------------------- home hero */
.home-hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(900px 520px at 80% 18%,rgba(201,168,76,.2),transparent 62%),radial-gradient(760px 520px at 0% 100%,rgba(47,111,222,.26),transparent 62%),linear-gradient(165deg,#06152B 0%,#0B2142 52%,#13315C 100%)}
.home-hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);background-size:30px 30px;-webkit-mask-image:linear-gradient(180deg,#000,transparent 82%);mask-image:linear-gradient(180deg,#000,transparent 82%);pointer-events:none}
.home-hero .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr);gap:clamp(24px,5vw,72px);align-items:center;padding-block:clamp(44px,7vw,96px) clamp(40px,6vw,80px)}
.home-hero .eyebrow{color:var(--gold-2);margin-bottom:22px}
.home-hero h1{font:700 clamp(44px,6.6vw,88px)/.97 var(--f-disp);letter-spacing:-.014em;margin-bottom:26px;text-wrap:balance}
.home-hero h1 em{font-style:italic;font-weight:600;color:var(--gold-2)}
.home-hero h1 .hi{color:var(--gold-2);font-size:.9em;font-weight:600}
.home-hero .lead{font-size:clamp(1.05rem,1.5vw,1.25rem);line-height:1.6;color:#C6D2E8;max-width:34em;margin-bottom:32px}
.hero-glow{position:absolute;right:-10%;top:-20%;width:70vw;height:70vw;max-width:900px;max-height:900px;border-radius:50%;background:radial-gradient(circle,rgba(201,168,76,.12),transparent 62%);pointer-events:none}
.home-hero .hr1{right:-120px;top:-170px;width:480px;height:480px}
.home-hero .hr2{left:-100px;bottom:-140px;right:auto;top:auto;width:300px;height:300px}
.resume{display:flex;align-items:center;gap:16px;margin-top:26px;padding:14px 20px 14px 14px;border-radius:18px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);backdrop-filter:blur(10px);
  color:#fff;text-decoration:none;max-width:520px;transition:background .2s,transform .2s}
.resume:hover{background:rgba(255,255,255,.14);transform:translateY(-2px);text-decoration:none}
.rs-ic{flex:none;width:46px;height:46px;border-radius:50%;background:var(--gold);color:#0B2040;display:grid;place-items:center}
.rs-tx{flex:1;min-width:0;display:flex;flex-direction:column}
.rs-tx small{font:700 .6rem var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--gold-2)}
.rs-tx b{font:700 1.05rem/1.25 var(--f-ui);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rs-tx em{font-style:normal;font-size:.85rem;color:#B5C3DD}
.hero-art{display:flex;justify-content:center;align-items:center}
.orbit{width:100%;max-width:560px;height:auto;overflow:visible;filter:drop-shadow(0 30px 60px rgba(0,0,0,.35))}
.orb{transform-box:view-box;transform-origin:280px 280px}
.orb-a{animation:spin 110s linear infinite}
.orb-b{animation:spin 170s linear infinite reverse}
.orb .node{transform-box:view-box}
.orb-a .node{animation:spin 110s linear infinite reverse}
.orb-b .node{animation:spin 170s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* hero search + quick access */
.hero-search{display:flex;align-items:center;gap:12px;width:100%;max-width:520px;margin-top:26px;padding:0 16px 0 18px;height:56px;border-radius:16px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);
  color:#C3D0E8;backdrop-filter:blur(10px);font:500 1.02rem var(--f-body);text-align:left;transition:background .2s,border-color .2s}
.hero-search:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.4)}
.hero-search span{flex:1}
.hero-search kbd{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.2);color:#DCE5F5;box-shadow:none}
.hero-guide{display:inline-flex;align-items:center;gap:8px;margin-top:14px;color:var(--gold-2);font:600 .82rem var(--f-ui);text-decoration:none}
.hero-guide:hover{text-decoration:underline;color:#fff}
.qa-strip{background:var(--surface);border-bottom:1px solid var(--line);padding:18px 0}
.qa-strip .wrap{display:flex;align-items:center;gap:18px}
.qa-label{flex:none;font:700 .64rem var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--soft)}
.qa-row{display:flex;flex-wrap:wrap;gap:8px;padding:2px 0}
.qa-row::-webkit-scrollbar{display:none}
.qa{flex:none;display:inline-flex;align-items:center;gap:8px;padding:.62em 1.05em;border-radius:30px;border:1px solid var(--line);background:var(--surface-2);color:var(--ink-2);text-decoration:none;font:600 .78rem/1 var(--f-ui);white-space:nowrap;transition:all .15s}
.qa i{width:8px;height:8px;border-radius:50%;background:var(--ac)}
.qa:hover{border-color:var(--ac);color:var(--ink);background:color-mix(in srgb,var(--ac) 9%,var(--surface));text-decoration:none}
@media (max-width:760px){.qa-strip .wrap{flex-direction:column;align-items:flex-start;gap:10px}.qa-row{width:100%;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}}

/* reveal on scroll */
.rv{opacity:0;transform:translateY(18px);transition:opacity .7s ease var(--d,0ms),transform .7s cubic-bezier(.2,.8,.2,1) var(--d,0ms)}
.rv.in{opacity:1;transform:none}
@media print{.rv{opacity:1!important;transform:none!important}}

/* ---------------------------------------------------------------------------------------- bands */
.band{padding:clamp(54px,8vw,104px) 0}
.band.alt{background:var(--bg-2);border-block:1px solid var(--line-2)}
.band-h{max-width:760px;margin:0 auto clamp(30px,5vw,52px);text-align:center}
.band-h .eyebrow{margin-bottom:14px}
.band-h h2{font:700 clamp(32px,4.4vw,52px)/1.05 var(--f-disp);letter-spacing:-.01em;text-wrap:balance}
.band-h p{margin-top:14px;color:var(--muted);font-size:1.12rem}
:root[data-theme="dark"] .eyebrow{color:var(--gold-2)}

.course-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
.course-card{display:flex;flex-direction:column;border-radius:var(--r-l);overflow:hidden;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-2);transition:transform .25s,box-shadow .25s}
.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.course-card .cv{position:relative;min-height:200px;background:linear-gradient(135deg,#071A35,#1B3F7A);color:#fff;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;padding:24px 28px}
.cc-pron .cv{background:linear-gradient(135deg,#0A1D3B,#0E5C6D)}
.course-card .cv::before{content:"";position:absolute;inset:12px;border:1px solid rgba(201,168,76,.3);border-radius:16px;pointer-events:none}
.cv .hr1{width:300px;height:300px;right:-80px;top:-120px}.cv .hr2{width:190px;height:190px;right:40px;top:-90px}
.cv-k{position:relative;font:700 .66rem var(--f-ui);letter-spacing:.22em;text-transform:uppercase;color:var(--gold)}
.cv-ic{position:absolute;right:30px;top:50%;transform:translateY(-50%);width:112px;height:112px;border-radius:50%;border:1.5px solid rgba(201,168,76,.55);display:grid;place-items:center;
  background:radial-gradient(circle at 30% 25%,rgba(255,255,255,.2),rgba(255,255,255,.03));color:#fff}
.cv-t{position:relative;font:700 clamp(26px,3vw,34px)/1.05 var(--f-disp);max-width:8em}
.course-card .cb{padding:26px 28px 28px;display:flex;flex-direction:column;gap:16px;flex:1}
.course-card h3{font:700 clamp(26px,2.8vw,34px)/1.1 var(--f-disp)}
.course-card .cb>p{color:var(--muted)}
.mchips{display:flex;flex-wrap:wrap;gap:7px}
.mchip{display:inline-flex;align-items:center;gap:8px;padding:.55em 1em;border-radius:30px;background:var(--surface-3);font:600 .72rem/1 var(--f-ui);color:var(--ink-2);text-decoration:none;transition:background .15s}
.mchip i{width:8px;height:8px;border-radius:50%;background:var(--ac)}
.mchip:hover{background:color-mix(in srgb,var(--ac) 14%,var(--surface));text-decoration:none}
.cc-foot{margin-top:auto;display:flex;flex-direction:column;gap:14px;padding-top:18px;border-top:1px solid var(--line-2)}
.cc-facts{font:700 .7rem var(--f-ui);letter-spacing:.06em;color:var(--soft);text-transform:uppercase}
.cc-prog{display:flex;align-items:center;gap:12px}
.cc-prog .bar{flex:1;--ac:var(--gold)}
.cc-pct{font:700 .72rem var(--f-ui);color:var(--muted);white-space:nowrap}
.cc-btns{display:flex;gap:10px;flex-wrap:wrap}

ol.steps{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:14px;list-style:none;margin:0;padding:0}
ol.steps li{position:relative;padding:22px 18px 20px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-1);display:flex;flex-direction:column;gap:8px;transition:transform .2s,box-shadow .2s}
ol.steps li:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.st-ic{width:48px;height:48px;border-radius:15px;background:linear-gradient(135deg,color-mix(in srgb,var(--gold) 20%,var(--surface)),var(--surface-3));display:grid;place-items:center;color:var(--gold-d);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--gold) 34%,transparent)}
.st-n{position:absolute;right:16px;top:14px;font:700 1.7rem/1 var(--f-disp);color:var(--line);font-variant-numeric:lining-nums}
ol.steps b{font:700 .9rem/1.25 var(--f-ui);margin-top:6px}
ol.steps p{font-size:.92rem;line-height:1.45;color:var(--muted)}

ul.features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;list-style:none;margin:0;padding:0}
ul.features li{padding:28px 26px;background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-1)}
.ft-ic{display:grid;place-items:center;width:54px;height:54px;border-radius:16px;background:linear-gradient(135deg,#0D2545,#16335F);color:var(--gold);margin-bottom:18px;box-shadow:0 10px 20px -10px rgba(13,37,69,.6)}
ul.features h3{font:700 1.5rem/1.15 var(--f-disp);margin-bottom:8px}
ul.features p{color:var(--muted);font-size:1rem}

.try-grid{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:clamp(26px,5vw,64px);align-items:center}
.try-copy h2{font:700 clamp(30px,3.8vw,46px)/1.05 var(--f-disp);margin:12px 0 16px}
.try-copy p{color:var(--muted);font-size:1.08rem}
.try-demo{min-width:0}
.try-demo .pw{box-shadow:var(--shadow-3)}
ul.tick{list-style:none;padding:0;margin:20px 0 0;display:flex;flex-direction:column;gap:11px}
ul.tick li{position:relative;padding-left:2em;color:var(--ink-2)}
ul.tick li::before{content:"";position:absolute;left:0;top:.18em;width:1.35em;height:1.35em;border-radius:50%;background:var(--good-t) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23139B6A' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7.5'/%3E%3C/svg%3E") center/62% no-repeat}

.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.tile{position:relative;display:flex;flex-direction:column;gap:6px;padding:24px 22px 22px;border-radius:20px;background:var(--surface);border:1px solid var(--line);text-decoration:none;color:var(--ink);overflow:hidden;transition:transform .2s,box-shadow .2s,border-color .2s}
.tile::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--ac)}
.tile::after{content:"";position:absolute;right:-50px;bottom:-60px;width:150px;height:150px;border-radius:50%;background:radial-gradient(circle,color-mix(in srgb,var(--ac) 20%,transparent),transparent 70%)}
.tile:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--ac-line,var(--ac));text-decoration:none}
.tile-ic{width:46px;height:46px;border-radius:14px;background:var(--ac-soft,var(--ac-tint));color:var(--ac-ink,var(--ac-dark));display:grid;place-items:center;margin-bottom:8px}
.tile-k{font:700 .6rem var(--f-ui);letter-spacing:.18em;text-transform:uppercase;color:var(--soft)}
.tile b{font:700 1.45rem/1.12 var(--f-disp)}
.tile small{color:var(--muted);font-size:.9rem;line-height:1.4}
.tile-c{margin-top:10px;font:700 .68rem var(--f-ui);color:var(--ac-ink,var(--ac-dark));letter-spacing:.06em}

.tool-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.tool-card{display:flex;flex-direction:column;gap:8px;padding:26px 24px 22px;border-radius:20px;background:var(--surface);border:1px solid var(--line);text-decoration:none;color:var(--ink);box-shadow:var(--shadow-1);transition:transform .2s,box-shadow .2s,border-color .2s}
.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--gold);text-decoration:none}
.tc-ic{width:54px;height:54px;border-radius:16px;background:linear-gradient(135deg,#0D2545,#16335F);color:var(--gold);display:grid;place-items:center;margin-bottom:10px}
.tool-card b{font:700 1.3rem/1.15 var(--f-disp)}
.tool-card p{color:var(--muted);font-size:.96rem;flex:1}
.tc-go{display:inline-flex;align-items:center;gap:6px;font:700 .74rem var(--f-ui);color:var(--gold-d);margin-top:8px}
:root[data-theme="dark"] .tc-go{color:var(--gold-2)}
.tool-card.big{padding:32px 28px 26px}
.tool-card.big b{font-size:1.55rem}

.home-cta{position:relative;overflow:hidden;color:#fff;text-align:center;padding:clamp(60px,9vw,110px) 0;background:radial-gradient(800px 420px at 50% 0%,rgba(201,168,76,.2),transparent 65%),linear-gradient(165deg,#06152B,#0D2545 60%,#14305A)}
.home-cta .hi.big{display:block;font:600 clamp(34px,5vw,60px)/1.1 "NDev",sans-serif;color:var(--gold-2);margin-bottom:14px}
.home-cta h2{font:700 clamp(30px,4.4vw,54px)/1.08 var(--f-disp);max-width:16em;margin:0 auto 30px;text-wrap:balance}
.home-cta .hero-cta{justify-content:center}

/* ---------------------------------------------------------------------------------------- course overview + tool heroes */
.course-hero,.tool-hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(800px 420px at 85% 0%,rgba(201,168,76,.2),transparent 62%),linear-gradient(150deg,#06152B 0%,#0B2142 55%,#13315C 100%);padding:clamp(28px,5vw,56px) 0 clamp(34px,5vw,60px)}
.course-hero .wrap,.tool-hero .wrap{position:relative;z-index:1}
.course-hero .eyebrow,.tool-hero .eyebrow{color:var(--gold-2);margin-bottom:14px}
.course-hero h1,.tool-hero h1{font:700 clamp(38px,5.6vw,72px)/1 var(--f-disp);letter-spacing:-.012em;margin-bottom:16px;text-wrap:balance}
.course-hero .lead,.tool-hero .lead{font-size:clamp(1.05rem,1.4vw,1.22rem);color:#C6D2E8;max-width:40em;line-height:1.55}
.course-hero .sub{margin-top:12px;color:#9FB0CE;max-width:40em}
.course-hero .hero-cta{margin-top:28px}
.ch-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:36px;align-items:end}
.course-hero .hero-stats{margin:0;padding:22px 24px;border:1px solid rgba(255,255,255,.16);border-radius:20px;background:rgba(255,255,255,.06);display:grid;grid-template-columns:1fr 1fr;gap:20px 24px;backdrop-filter:blur(8px)}
.cc-tools{display:flex;flex-wrap:wrap;gap:14px 20px;align-items:center;padding:26px 0 8px}
.cc-tools .field{flex:1 1 260px;max-width:380px}
.cc-tools .chips{display:flex;flex-wrap:wrap;gap:8px}
.cc-empty{padding:40px 0;color:var(--muted);text-align:center}
.mod{padding:30px 0 14px}
.mod-h{display:flex;align-items:center;gap:18px;margin-bottom:20px;flex-wrap:wrap}
.mod-ic{flex:none;width:68px;height:68px;border-radius:21px;background:linear-gradient(135deg,var(--ac),var(--ac-dark));color:#fff;display:grid;place-items:center;box-shadow:0 14px 28px -14px var(--ac)}
.mod-tx{flex:1;min-width:220px}
.mod-k{display:block;font:700 .68rem var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--ac-ink);margin-bottom:4px}
.mod-tx h2{font:700 clamp(28px,3.4vw,40px)/1.08 var(--f-disp)}
.mod-tx p{color:var(--muted);margin-top:4px;font-size:.98rem}
.mod-prog{min-width:200px;display:flex;flex-direction:column;gap:7px;margin-left:auto}
.mod-count{font:700 .72rem var(--f-ui);color:var(--muted);text-align:right}
.cc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:14px}
.cc{position:relative;display:flex;gap:16px;align-items:center;padding:16px 18px;border-radius:18px;background:var(--surface);border:1px solid var(--line);text-decoration:none;color:var(--ink);box-shadow:var(--shadow-1);transition:transform .2s,box-shadow .2s,border-color .2s}
.cc:hover{border-color:var(--ac);transform:translateY(-3px);box-shadow:var(--shadow-2);text-decoration:none}
.cc-n{flex:none;width:54px;height:54px;border-radius:16px;background:var(--ac-soft);color:var(--ac-ink);display:grid;place-items:center;font:700 1.5rem/1 var(--f-disp);font-variant-numeric:lining-nums;transition:all .2s}
.cc-body{flex:1;min-width:0}
.cc-t{display:block;font:700 1rem/1.28 var(--f-ui);color:var(--ink);text-wrap:balance}
.cc-meta{display:flex;flex-wrap:wrap;gap:4px 14px;margin-top:7px;font:600 .68rem/1.2 var(--f-ui);color:var(--soft)}
.cc-meta span{display:inline-flex;align-items:center;gap:5px}
.cc-meta .lvl{color:var(--ac-ink)}
.cc-ck{flex:none;width:26px;height:26px;border-radius:50%;background:var(--good);color:#fff;display:none;place-items:center}
.cc.is-done .cc-ck{display:grid}
.cc.is-done .cc-n{background:var(--good);color:#fff}
.cc.is-visited:not(.is-done) .cc-n{box-shadow:inset 0 0 0 2px var(--ac)}
.cc.is-hidden{display:none}
.mod.is-empty{display:none}

/* ---------------------------------------------------------------------------------------- tool pages */
.tool-bar{display:flex;flex-wrap:wrap;gap:12px 18px;align-items:center;padding:20px 0 14px}
.tool-bar .field{flex:1 1 300px;max-width:420px}
.tool-bar .chips{display:flex;flex-wrap:wrap;gap:8px}
.tool-opts{display:flex;flex-wrap:wrap;gap:12px 22px;align-items:center}
.tool-meta{margin-left:auto;font:700 .72rem var(--f-ui);color:var(--soft);letter-spacing:.04em}
.vtable.big{max-height:none;margin-bottom:12px}
.vtable.big thead th{top:var(--topbar-h)}
.vtable.big{overflow:visible}
.vtable.big table{border-collapse:separate;border-spacing:0}
.vt tr.famrow th{background:var(--surface-3);color:var(--ink);font:700 .78rem/1.2 var(--f-ui);letter-spacing:.06em;text-transform:none;padding:12px 16px;position:static;border-top:1px solid var(--line);white-space:normal}
.vt td.vk,.vt th.vk-h{text-align:center;width:5.5em}
.vt td.vk input{width:1.25em;height:1.25em}
.vt tr.known td{opacity:.5}
.vt .say-btn.inline{width:1.9em;height:1.9em}
.vempty,.tool-note{color:var(--muted);font-size:.95rem;padding:10px 4px}
.tool-note{max-width:48em;margin:12px 0 40px}
.vtable.test td[data-reveal]{position:relative}
.vt tr.is-hidden{display:none}

/* plan */
.plan-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:24px;padding-block:30px 70px;align-items:start}
.plan-main{display:flex;flex-direction:column;gap:20px;min-width:0}
.plan-top{display:flex;gap:28px;align-items:center;flex-wrap:wrap;background:linear-gradient(125deg,#0A1D3B,#14305A);color:#fff;border-color:transparent;box-shadow:var(--shadow-3)}
.plan-ring{position:relative;flex:none}
.ring-bg{stroke:rgba(255,255,255,.15)}.ring-fg{stroke:var(--gold);transition:stroke-dashoffset .8s cubic-bezier(.2,.8,.2,1)}
.ring-t{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.ring-t b{font:700 2.4rem/1 var(--f-disp);color:var(--gold-2)}
.ring-t span{font:700 .6rem var(--f-ui);letter-spacing:.14em;text-transform:uppercase;color:#A9B8D3}
.plan-next{flex:1;min-width:240px}
.plan-next .eyebrow{color:var(--gold-2)}
.plan-next h2{font:700 1.9rem/1.1 var(--f-disp);margin:6px 0 6px}
.plan-next p{color:#C6D2E8}
.plan-btns{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.plan-top .btn.ghost{border-color:rgba(255,255,255,.3);color:#fff}
.plan-top .btn.ghost:hover{background:rgba(255,255,255,.1)}
.plan-streak{margin-top:12px;font:700 .76rem var(--f-ui);color:var(--gold-2)}
.days{display:grid;grid-template-columns:repeat(auto-fill,minmax(58px,1fr));gap:10px}
.day{--ac:#2F6FDE;position:relative;aspect-ratio:1;border-radius:16px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink-2);font:700 1.05rem var(--f-ui);display:grid;place-items:center;transition:all .15s}
.day.p2{--ac:#7C4DDB}.day.p3{--ac:#E8731A}
.day:hover{border-color:var(--ac);transform:translateY(-2px);color:var(--ac-ink,var(--ac))}
.day svg{display:none;position:absolute;right:6px;top:6px;width:13px;height:13px}
.day[aria-pressed="true"]{background:var(--ac);border-color:var(--ac);color:#fff}
.day[aria-pressed="true"] svg{display:block}
.day.today{box-shadow:0 0 0 3px color-mix(in srgb,var(--gold) 55%,transparent)}
.days-key{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:14px;font:700 .66rem var(--f-ui);letter-spacing:.06em;color:var(--muted)}
.days-key span::before{content:"";display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:7px;background:#2F6FDE;vertical-align:-1px}
.days-key .p2::before{background:#7C4DDB}.days-key .p3::before{background:#E8731A}
.phases{margin:14px 0}
.ph{display:grid;grid-template-columns:5em minmax(0,1fr) auto;gap:14px;align-items:center;background:var(--surface-2);border:1px solid var(--line-2);border-radius:14px;padding:8px 16px 8px 8px;transition:all .2s}
.ph .ph-d{background:#2F6FDE}
.ph[data-start="15"] .ph-d,.ph[data-start="18"] .ph-d,.ph[data-start="21"] .ph-d,.ph[data-start="24"] .ph-d,.ph[data-start="26"] .ph-d{background:#7C4DDB}
.ph[data-start="28"] .ph-d,.ph[data-start="30"] .ph-d{background:#E8731A}
.ph b{display:block;font:700 .96rem/1.25 var(--f-ui)}
.ph p{margin:.15em 0 0;color:var(--muted);font-size:.96em}
.ph-links{display:flex;gap:10px;margin-top:6px;font:700 .72rem var(--f-ui)}
.ph-ck{width:28px;height:28px;border-radius:50%;background:var(--good);color:#fff;display:none;place-items:center}
.ph.is-done{opacity:.7}.ph.is-done .ph-ck{display:grid}
.ph.is-now{border-color:var(--gold);box-shadow:0 0 0 3px color-mix(in srgb,var(--gold) 30%,transparent)}
.plan-side{position:sticky;top:calc(var(--topbar-h) + 18px)}
.sc-list{list-style:none;margin:16px 0 0;padding:0}
.sc-list li{display:grid;grid-template-columns:1.8em minmax(0,1fr) auto auto;gap:10px;align-items:center;padding:9px 0;border-bottom:1px dashed var(--line);font-size:.95rem}
.sc-list .sc-c{display:flex;flex-direction:column;align-items:center;gap:3px;font:700 .56rem var(--f-ui);letter-spacing:.1em;text-transform:uppercase;color:var(--soft);cursor:pointer}
.sc-sums{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}
.sc-sums>div{background:var(--surface-3);border-radius:12px;padding:10px 12px;text-align:center;font:600 .8rem var(--f-ui);color:var(--muted)}
.sc-sums span{display:block;font:700 .56rem var(--f-ui);letter-spacing:.14em;text-transform:uppercase;color:var(--soft);margin-bottom:3px}
.sc-sums b{font:700 1.4rem var(--f-disp);color:var(--ink)}
.sc-sums .delta b.up{color:var(--good-d)}.sc-sums .delta b.down{color:var(--bad-d)}

/* quiz */
.quiz-wrap{padding-block:30px 70px;max-width:860px}
.qs-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px 28px}
.qs-grid fieldset{border:0;padding:0;margin:0;min-width:0}
.qs-grid legend{font:700 .64rem var(--f-ui);letter-spacing:.18em;text-transform:uppercase;color:var(--soft);padding:0;margin-bottom:9px}
.qs-actions{display:flex;align-items:center;gap:18px;margin-top:26px;flex-wrap:wrap}
.qs-note{font:600 .8rem var(--f-ui);color:var(--muted)}
.quiz-run{margin-top:22px}
.qz-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--shadow-2);overflow:hidden}
.qz-top{display:flex;align-items:center;gap:16px;padding:16px 22px;border-bottom:1px solid var(--line-2);background:var(--surface-2)}
.qz-top .bar{flex:1}
.qz-top .pos{font:700 .78rem var(--f-ui);color:var(--muted)}
.qz-src{font:700 .64rem var(--f-ui);letter-spacing:.12em;text-transform:uppercase;color:var(--ac-ink)}
.qz-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:16px}
.qz-set{font:600 .8rem var(--f-ui);color:var(--soft)}
.qz-q{font-size:1.3rem;line-height:1.5;font-family:var(--f-body)}
.qz-card .pq{padding:0;border:0;background:none}
.qz-card .pq-ctl,.qz-card .pq-fb{margin-left:0}
.qz-next{display:flex;justify-content:flex-end;margin-top:6px}
.qz-result{padding:34px 26px;text-align:center}
.qz-result .big{font:700 clamp(52px,9vw,84px)/1 var(--f-disp);color:var(--gold-d)}
:root[data-theme="dark"] .qz-result .big{color:var(--gold-2)}
.qz-result h2{font:700 1.9rem var(--f-disp);margin:6px 0 4px}
.qz-miss{text-align:left;margin-top:26px;display:flex;flex-direction:column;gap:12px}
.qz-miss h3{font:700 .72rem var(--f-ui);letter-spacing:.16em;text-transform:uppercase;color:var(--soft)}
.qz-miss-item{background:var(--surface-2);border:1px solid var(--line-2);border-radius:14px;padding:14px 16px}
.qz-miss-item .a{margin-top:8px;padding-top:8px;border-top:1px dashed var(--line);color:var(--good-d)}
.qz-miss-item .src{font:700 .62rem var(--f-ui);letter-spacing:.1em;text-transform:uppercase;color:var(--soft);margin-top:8px}

/* progress */
.pg-wrap{padding-block:30px 80px;display:flex;flex-direction:column;gap:22px}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px 22px;box-shadow:var(--shadow-1)}
.stat small{display:block;font:700 .62rem var(--f-ui);letter-spacing:.18em;text-transform:uppercase;color:var(--soft)}
.stat b{display:block;font:700 2.7rem/1.05 var(--f-disp);margin:6px 0 2px;color:var(--ink);font-variant-numeric:lining-nums}
.stat span{font-size:.9rem;color:var(--muted)}
.stat.gold b{color:var(--gold-d)}
:root[data-theme="dark"] .stat.gold b{color:var(--gold-2)}
.pg-courses{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.pg-course{display:flex;flex-direction:column;gap:16px}
.pg-course-h{display:flex;align-items:center;gap:18px}
.pg-course-h .ring-bg{stroke:var(--line)}.pg-course-h .ring-fg{stroke:var(--gold)}
.pg-course-h h3{font:700 1.5rem/1.1 var(--f-disp)}
.pg-course-h p{color:var(--muted);font-size:.92rem}
.pg-mods{display:flex;flex-direction:column;gap:10px}
.pg-mod{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 10px;align-items:center;font:600 .8rem var(--f-ui)}
.pg-mod .bar{grid-column:1/-1;--ac:var(--c)}
.pg-mod a{color:var(--ink);text-decoration:none}
.pg-mod a:hover{text-decoration:underline}
.pg-mod span{color:var(--soft);font-size:.72rem}
.map-group{margin-top:8px}
.map-group h4{font:700 .72rem var(--f-ui);letter-spacing:.1em;color:var(--muted);margin:0 0 8px;display:flex;gap:8px;align-items:center}
.map-group h4 i{width:9px;height:9px;border-radius:50%;background:var(--c)}
.map-grid{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.map-cell{width:36px;height:36px;border-radius:10px;border:1.5px solid var(--line);display:grid;place-items:center;font:700 .72rem var(--f-ui);color:var(--soft);text-decoration:none;background:var(--surface);transition:transform .15s}
.map-cell:hover{transform:translateY(-2px);text-decoration:none;border-color:var(--c)}
.map-cell.v{background:color-mix(in srgb,var(--c) 14%,var(--surface));color:var(--ink-2);border-color:color-mix(in srgb,var(--c) 40%,var(--line))}
.map-cell.d{background:var(--c);border-color:var(--c);color:#fff}
.map-key{display:flex;gap:16px;flex-wrap:wrap;font:700 .66rem var(--f-ui);letter-spacing:.06em;color:var(--muted);margin-top:4px}
.map-key span::before{content:"";display:inline-block;width:12px;height:12px;border-radius:4px;margin-right:6px;vertical-align:-2px;border:1.5px solid var(--line)}
.map-key .kd::before{background:var(--ink-2);border-color:var(--ink-2)}
.map-key .kv::before{background:color-mix(in srgb,var(--ink-2) 16%,var(--surface));border-color:var(--soft)}
.pg-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.pg-list li a{display:flex;align-items:center;gap:14px;padding:12px 14px;border-radius:12px;border:1px solid var(--line-2);background:var(--surface-2);text-decoration:none;color:var(--ink)}
.pg-list li a:hover{border-color:var(--ac,var(--soft))}
.pg-list .dot{flex:none;width:10px;height:10px;border-radius:50%;background:var(--c)}
.pg-list b{font:700 .92rem var(--f-ui)}
.pg-list small{display:block;color:var(--muted);font-size:.84rem;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pg-empty{color:var(--muted);padding:6px 2px}
.backup-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.pg-two{display:grid;grid-template-columns:1fr 1fr;gap:18px}

/* guide */
.guide-grid{display:flex;flex-direction:column;gap:18px;padding-block:30px 80px;max-width:900px}
.steps-list,.how-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.steps-list li{display:flex;gap:14px;align-items:flex-start}
.steps-list b{font:700 .98rem var(--f-ui)}
.steps-list p{color:var(--muted);font-size:.96rem;margin-top:2px}
.how-list li{display:flex;gap:14px;align-items:flex-start}
.hn{flex:none;width:28px;height:28px;border-radius:50%;background:var(--gold);color:#0B2040;font:800 .78rem/28px var(--f-ui);text-align:center}
.legend2{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px}
.legend2 li{display:flex;gap:14px;align-items:center;background:var(--surface-2);border:1px solid var(--line-2);border-radius:14px;padding:10px 14px}
.lg-s{flex:none;min-width:66px;text-align:center;font:600 1.15rem "SS3","NDev",sans-serif;color:var(--ink);background:var(--gold-t);border-radius:10px;padding:.55em .6em;white-space:nowrap}
.legend2 b{display:block;font:700 .82rem/1.2 var(--f-ui)}
.legend2 small{display:block;color:var(--muted);font-size:.84rem;line-height:1.25;margin-top:2px}
.chips-demo{display:flex;flex-wrap:wrap;gap:8px}
.keylist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.keylist li{display:flex;gap:16px;align-items:center}
.keys{display:inline-flex;align-items:center;gap:6px;min-width:150px}
.keys em{font:500 .8rem var(--f-body);color:var(--soft)}
.nf{text-align:center;padding:100px 0;flex:1}
.nf .hi.big{display:block;font:600 64px/1 "NDev",sans-serif;color:var(--gold-d)}
.nf h1{font:700 clamp(32px,5vw,52px) var(--f-disp);margin:12px 0 8px}
.nf p{color:var(--muted);margin-bottom:24px}

/* ---------------------------------------------------------------------------------------- responsive */
@media (max-width:1180px){ol.steps{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media (max-width:1020px){
  .home-hero .hero-grid{grid-template-columns:1fr;padding-top:36px}
  .hero-art{order:-1;max-width:380px;margin:0 auto}
  .course-cards{grid-template-columns:1fr}
  ul.features{grid-template-columns:repeat(2,1fr)}
  .try-grid{grid-template-columns:1fr}
  .ch-grid{grid-template-columns:1fr}
  .plan-grid{grid-template-columns:1fr}
  .plan-side{position:static}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .pg-courses,.pg-two{grid-template-columns:1fr}
}
@media (max-width:760px){ol.steps{grid-template-columns:repeat(2,minmax(0,1fr))}ol.steps li:last-child{grid-column:1/-1}.hero-stats{grid-template-columns:repeat(2,auto)}}
@media (max-width:640px){
  /* explorer tables become compact cards on phones */
  .vtable.big{overflow:visible;border-radius:14px}
  .vtable.big table,.vtable.big tbody{display:block;min-width:0}
  .vtable.big thead{display:none}
  .vtable.big tr{display:grid;border-top:1px solid var(--line-2);padding:10px 14px;gap:2px 12px;align-items:center}
  .vtable.big tbody tr:nth-child(even) td{background:none}
  .vtable.big tbody tr:nth-child(even){background:var(--surface-2)}
  .vtable.big td{display:block;padding:0;border:0}
  .vtable.big tr.famrow{display:block;padding:0}
  .vtable.big tr.famrow th{display:block;padding:11px 14px;text-align:left}
  .vtable.big tr.vrow{grid-template-columns:1fr 1fr auto;grid-template-areas:"v1 v1 k" "v2 v3 k" "vm vm vm"}
  .vtable.big td.v1{grid-area:v1;font-size:1.12rem}
  .vtable.big td.v2{grid-area:v2}.vtable.big td.v3{grid-area:v3}.vtable.big td.vm{grid-area:vm;font-size:.95rem;margin-top:2px}
  .vtable.big td.vk{grid-area:k;width:auto}
  .vtable.big td.v2::before,.vtable.big td.v3::before{display:block;font:700 .55rem var(--f-ui);letter-spacing:.16em;color:var(--soft);margin-bottom:1px}
  .vtable.big td.v2::before{content:"V2 · PAST"}.vtable.big td.v3::before{content:"V3 · PARTICIPLE"}
  .vtable.big tr.wrow{grid-template-columns:1fr auto;grid-template-areas:"w k" "bad bad" "good good"}
  .vtable.big td.w-word{grid-area:w;font-size:1.1rem}
  .vtable.big td.w-bad{grid-area:bad}.vtable.big td.w-good{grid-area:good}
  .vtable.big td.w-bad::before,.vtable.big td.w-good::before{display:inline-block;min-width:6.2em;margin-right:6px;font:700 .55rem var(--f-ui);letter-spacing:.14em;text-transform:uppercase;color:var(--soft)}
  .vtable.big td.w-bad::before{content:"Common"}.vtable.big td.w-good::before{content:"Correct"}
  .vtable.big td.vk{grid-area:k}
}
@media (max-width:760px){.vtable.big{overflow-x:auto}.vtable.big table{min-width:0}.vtable.big td{padding:8px 10px}.vtable.big thead th{padding:11px 10px;position:static}.vt td.vk,.vt th.vk-h{width:3.6em}}
@media (max-width:640px){
  ul.features{grid-template-columns:1fr}
  .cc-grid{grid-template-columns:1fr}
  .qs-grid{grid-template-columns:1fr}
  .cv-ic{width:84px;height:84px;right:20px}
  .course-card .cb{padding:22px 20px 22px}
  .tool-meta{margin-left:0;width:100%}
  .sc-list li{grid-template-columns:1.6em minmax(0,1fr)}
  .sc-list .sc-c{flex-direction:row;gap:6px;grid-column:2}
  .mod-prog{margin-left:0;width:100%}
  .home-hero .hero-art{max-width:250px}
  .qz-body{padding:20px 18px 22px}
  .stat b{font-size:2.2rem}
}

/* =====================================================================================================
   PRINT — clean chapter printouts
   ===================================================================================================== */
@media print{
  :root{--topbar-h:0px}
  html{font-size:11pt}
  body{background:#fff;color:#000}
  .topbar,.site-foot,.outline,.rail,.secnav,.ol-toggle,.scrim,.hero-actions,.sec-anchor,.say-btn,.chapter-end .complete-card,.notes-card,.pn-row,.sec-toggle,.pq-ctl,.pw-reset,.callout-link,.skip,.toast,.cmdk,.pop{display:none!important}
  .reading{display:block;padding:0;max-width:none}
  .chapter{max-width:none}
  .chapter-hero{background:#0D2545!important;color:#fff!important;-webkit-print-color-adjust:exact;print-color-adjust:exact;box-shadow:none;border-radius:10px;break-inside:avoid}
  .chapter-hero *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .hero-num{background:none!important;-webkit-background-clip:border-box!important;background-clip:border-box!important;color:#D9BC62!important;-webkit-text-fill-color:#D9BC62}
  .sec{box-shadow:none;border:1px solid #ccc;break-inside:auto;margin-bottom:12pt;padding:12pt}
  .sec-answers{border-style:solid}
  details.sec-answers>*:not(summary){display:block!important}
  .use,.qrow,.hnote,.mist,.fig,.pw,.rulecard{break-inside:avoid}
  .pq-fb{display:block!important}
  .pq-fb[hidden]{display:block!important}
  .pq-official{border:0;padding:0}
  .pq-self{display:none!important}
  .vtable,.tbl{overflow:visible}
  a{color:inherit;text-decoration:none}
  .next-card{background:#0D2545!important;color:#fff!important;-webkit-print-color-adjust:exact;print-color-adjust:exact;break-inside:avoid}
  *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  @page{margin:14mm}
}