/* ==========================================================
   StudyAllExam · अध्ययन — Design system v6
   ========================================================== */
:root{
  /* थीम के मूल रंग — एडमिन पैनल (साइट डिज़ाइन) से site-theme.css इन्हें बदलती है */
  --c-brand:#9f1239;
  --c-accent:#b45309;
  --c-hero:#26070f;
  --c-hl:#fcd34d;
  --bg:#f7f4ef;
  --paper:#ffffff;
  --paper-2:#fbf9f5;
  --ink:#1c1917;
  --ink-2:#44403c;
  --muted:#6b625a;
  --faint:#a8a29e;
  --border:#ebe5dc;
  --border-2:#dbd2c6;
  --brand:var(--c-brand);
  --brand-2:color-mix(in srgb,var(--c-brand) 84%,#000);
  --brand-soft:color-mix(in srgb,var(--c-brand) 10%,#fff);
  --on-brand:#ffffff;
  --accent:var(--c-accent);
  --accent-soft:color-mix(in srgb,var(--c-accent) 11%,#fff);
  --gold:var(--c-hl);
  --ok:#1f8a5b;
  --ok-soft:#e3f5ec;
  --bad:#c4402f;
  --bad-soft:#fdecea;
  --info:#2463b5;
  --info-soft:#e8f0fb;
  --shadow-sm:0 1px 2px rgba(20,16,12,.06);
  --shadow:0 12px 32px -14px rgba(20,16,12,.22);
  --shadow-lg:0 30px 70px -28px rgba(20,16,12,.42);
  --radius:16px;
  --radius-sm:10px;
  --font-body:'Hind','Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-head:'Mukta','Hind',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-ui:'Inter','Hind',system-ui,sans-serif;
  --wrap:1320px;
  --header:66px;
  --reading:17.5px;
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#0f0d0b;--paper:#1a1714;--paper-2:#14120f;--ink:#f0ebe5;--ink-2:#d6cfc6;--muted:#a39a90;--faint:#776e65;--border:#2c2722;--border-2:#3d3630;
  --brand:color-mix(in srgb,var(--c-brand) 58%,#fff);--brand-2:color-mix(in srgb,var(--c-brand) 44%,#fff);--brand-soft:color-mix(in srgb,var(--c-brand) 22%,var(--paper));--on-brand:#111111;
  --accent:color-mix(in srgb,var(--c-accent) 60%,#fff);--accent-soft:color-mix(in srgb,var(--c-accent) 20%,var(--paper));
  --ok:#5fd39a;--ok-soft:#10291f;--bad:#ff8a7a;--bad-soft:#3a1b17;--info:#8ab4f0;--info-soft:#13233b;
  --shadow-sm:0 1px 2px rgba(0,0,0,.4);--shadow:0 12px 32px -14px rgba(0,0,0,.7);--shadow-lg:0 30px 70px -28px rgba(0,0,0,.85);color-scheme:dark;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0f0d0b;--paper:#1a1714;--paper-2:#14120f;--ink:#f0ebe5;--ink-2:#d6cfc6;--muted:#a39a90;--faint:#776e65;--border:#2c2722;--border-2:#3d3630;
    --brand:color-mix(in srgb,var(--c-brand) 58%,#fff);--brand-2:color-mix(in srgb,var(--c-brand) 44%,#fff);--brand-soft:color-mix(in srgb,var(--c-brand) 22%,var(--paper));--on-brand:#111111;
    --accent:color-mix(in srgb,var(--c-accent) 60%,#fff);--accent-soft:color-mix(in srgb,var(--c-accent) 20%,var(--paper));
    --ok:#5fd39a;--ok-soft:#10291f;--bad:#ff8a7a;--bad-soft:#3a1b17;--info:#8ab4f0;--info-soft:#13233b;
    --shadow-sm:0 1px 2px rgba(0,0,0,.4);--shadow:0 12px 32px -14px rgba(0,0,0,.7);--shadow-lg:0 30px 70px -28px rgba(0,0,0,.85);color-scheme:dark;
  }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header) + 14px)}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--font-body);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg{max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
a{color:inherit;text-decoration:none}
::selection{background:color-mix(in srgb,var(--brand) 22%,transparent)}
:focus-visible{outline:3px solid color-mix(in srgb,var(--brand) 55%,transparent);outline-offset:2px;border-radius:8px}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.28;margin:0;font-weight:700;letter-spacing:-.005em}
h1,h2,h3{text-wrap:balance}
p{margin:0 0 1em}
.skip-link{position:absolute;left:-999px;top:8px;background:var(--brand);color:var(--on-brand);padding:8px 14px;border-radius:8px;z-index:100}
.skip-link:focus{left:12px}
.muted{color:var(--muted)}
.subtext{color:var(--muted);font-size:14.5px}
.eyebrow{font:700 11.5px/1.4 var(--font-ui);letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.eyebrow.hi{letter-spacing:.02em;font-size:12.5px}
.center{text-align:center}
.hidden{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
kbd{font:600 11px var(--font-ui);border:1px solid var(--border-2);border-bottom-width:2px;border-radius:6px;padding:1px 6px;color:var(--muted);background:var(--paper)}

/* ---------- Brand ---------- */
.brand{display:flex;align-items:center;gap:11px;flex:none;min-width:0}
.brandmark{display:grid;place-items:center;flex:none;width:40px;height:40px;border-radius:12px;color:#fff;background:linear-gradient(140deg,color-mix(in srgb,var(--c-brand) 78%,#fff) 0%,var(--c-brand) 55%,color-mix(in srgb,var(--c-brand) 72%,#000) 100%);font:700 25px/1 var(--font-head);padding-top:3px;box-shadow:0 6px 16px -6px color-mix(in srgb,var(--c-brand) 70%,transparent),inset 0 -2px 0 rgba(0,0,0,.18);position:relative}
.brandmark::after{content:"";position:absolute;right:-3px;top:-3px;width:11px;height:11px;border-radius:50%;background:var(--c-accent);border:2px solid var(--paper)}
.brand-text{display:flex;flex-direction:column;line-height:1.1;min-width:0}
.bw{font:800 19.5px/1.1 var(--font-ui);letter-spacing:-.025em;color:var(--ink);white-space:nowrap}
.bw b{font-weight:800}
.bw i{font-style:normal;color:var(--brand)}
.brand-text small{font:500 11.5px/1.3 var(--font-body);color:var(--muted);margin-top:3px;white-space:nowrap}

/* ---------- Header ---------- */
.topbar{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 86%,transparent);backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--border)}
.topbar-in{display:flex;align-items:center;gap:10px;height:var(--header);max-width:var(--wrap);margin:0 auto;padding:0 24px}
.icon-button{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:11px;color:var(--ink-2);flex:none;transition:background .15s,color .15s}
.icon-button:hover{background:var(--paper-2);color:var(--ink)}
.icon-button svg{width:21px;height:21px}
.menu-btn{border:1px solid var(--border);margin-right:2px}
#theme .i-sun{display:none}
:root[data-theme="dark"] #theme .i-sun{display:block}
:root[data-theme="dark"] #theme .i-moon{display:none}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) #theme .i-sun{display:block}
  :root:not([data-theme="light"]) #theme .i-moon{display:none}
}
.topnav{display:flex;align-items:center;gap:2px;margin-left:18px;min-width:0}
.tn-link{display:inline-flex;align-items:center;gap:4px;height:38px;padding:0 12px;border-radius:10px;font:500 15px/1 var(--font-body);color:var(--ink-2);white-space:nowrap;transition:background .15s,color .15s}
.tn-link:hover{background:var(--paper-2);color:var(--ink)}
.tn-link.active,.tn-dd.has-active > .tn-link{color:var(--brand);background:var(--brand-soft);font-weight:600}
.tn-link .chev{width:15px;height:15px;opacity:.7;transition:transform .2s}
.tn-dd{position:relative}
.tn-dd.open > .tn-link{background:var(--paper-2);color:var(--ink)}
.tn-dd.open > .tn-link .chev{transform:rotate(180deg)}
.tn-menu{display:none;position:absolute;top:calc(100% + 10px);left:-8px;min-width:300px;background:var(--paper);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-lg);padding:10px;z-index:60}
.tn-menu::before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
.tn-menu.tn-wide{grid-template-columns:1fr 1fr;gap:6px 10px;width:620px}
.tn-dd.open > .tn-menu{display:block}
.tn-dd.open > .tn-menu.tn-wide{display:grid}
@media (hover:hover) and (pointer:fine){
  .tn-dd:hover > .tn-menu{display:block}
  .tn-dd:hover > .tn-menu.tn-wide{display:grid}
}
.tn-h{margin:6px 10px 6px;font:700 11px var(--font-ui);letter-spacing:.1em;text-transform:uppercase;color:var(--faint)}
.tn-item{display:flex;align-items:center;gap:12px;padding:8px 10px;border-radius:11px;transition:background .12s}
.tn-item:hover,.tn-item.active{background:var(--paper-2)}
.tn-ic{display:grid;place-items:center;flex:none;width:36px;height:36px;border-radius:10px;background:var(--tint,var(--brand-soft));color:var(--color,var(--brand))}
.tn-ic svg{width:20px;height:20px}
.tn-item b{display:block;font:600 15px/1.3 var(--font-body);color:var(--ink)}
.tn-item small{display:block;font:500 12.5px/1.35 var(--font-body);color:var(--muted)}
.tn-all{display:block;padding:7px 10px;font:600 14px var(--font-body);color:var(--brand);border-radius:9px}
.tn-item + .tn-all{margin-top:8px;border-top:1px solid var(--border);border-radius:0;padding-top:12px}
.tn-all:hover{text-decoration:underline;text-underline-offset:3px}
.top-actions{display:flex;align-items:center;gap:8px;margin-left:auto;flex:none}
.global-search{display:flex;align-items:center;gap:9px;width:200px;height:40px;padding:0 10px 0 12px;border:1px solid var(--border);border-radius:11px;background:var(--paper-2);color:var(--muted);font-size:14.5px;transition:border-color .15s,box-shadow .15s}
.global-search:hover{border-color:var(--border-2);box-shadow:var(--shadow-sm)}
.global-search svg{width:18px;height:18px;flex:none}
.global-search .gs-text{flex:1;text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.crumbbar{max-width:var(--wrap);margin:0 auto;padding:16px 24px 0}
body[data-page="home"] .crumbbar{display:none}
.breadcrumb{display:flex;align-items:center;flex-wrap:nowrap;min-width:0;font:500 14px var(--font-body);color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.breadcrumb a{display:inline-flex;align-items:center;gap:6px;flex:none}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb a svg{width:15px;height:15px}
.breadcrumb .sep{margin:0 9px;color:var(--faint);flex:none}
.breadcrumb strong{color:var(--ink);font-weight:600;overflow:hidden;text-overflow:ellipsis}

/* ---------- Drawer (all pages) ---------- */
.sidebar{position:fixed;inset:0 auto 0 0;width:min(330px,88vw);z-index:70;display:flex;flex-direction:column;background:var(--paper);border-right:1px solid var(--border);padding:16px 14px 18px;overflow-y:auto;scrollbar-width:thin;transform:translateX(-104%);transition:transform .26s cubic-bezier(.3,.7,.2,1);box-shadow:var(--shadow-lg);visibility:hidden}
.sidebar.open{transform:none;visibility:visible}
.side-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:2px 4px 14px;border-bottom:1px solid var(--border)}
.side-streak{margin:14px 4px 2px;padding:10px 12px;border-radius:12px;background:var(--accent-soft);font-size:14px;color:var(--ink-2)}
.side-streak strong{color:var(--accent);font-family:var(--font-ui)}
nav .nav-group{font:700 11.5px var(--font-ui);letter-spacing:.06em;color:var(--faint);margin:18px 12px 6px;text-transform:uppercase}
nav a.nav-item{display:flex;align-items:center;gap:12px;padding:8px 12px;border-radius:10px;margin:1px 0;font:500 15.5px/1.3 var(--font-body);color:var(--ink-2);transition:background .15s,color .15s}
nav a.nav-item:hover{background:var(--paper-2);color:var(--ink)}
nav a.nav-item.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
nav a.nav-item svg{width:19px;height:19px;flex:none;opacity:.85}
nav a.nav-item .count{margin-left:auto;font:600 11.5px var(--font-ui);color:var(--faint)}
.side-bottom{margin-top:auto;border-top:1px solid var(--border);padding:14px 10px 0}
.side-bottom small{font:500 11.5px var(--font-ui);color:var(--faint);letter-spacing:.02em}
.scrim{position:fixed;inset:0;background:rgba(10,8,6,.5);z-index:65;backdrop-filter:blur(3px)}

/* ---------- Shell ---------- */
.shell{min-height:calc(100vh - var(--header));display:flex;flex-direction:column}
main{flex:1;width:100%;max-width:var(--wrap);margin:0 auto;padding:22px 24px 72px;outline:none}
body[data-page="home"] main{padding-top:24px}
.loading{display:flex;gap:12px;align-items:center;justify-content:center;min-height:50vh;color:var(--muted)}
.spinner{width:22px;height:22px;border:3px solid var(--border);border-top-color:var(--brand);border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.read-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:80;pointer-events:none}
.read-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand-2),var(--accent))}
.to-top{position:fixed;right:22px;bottom:24px;z-index:44;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:var(--paper);color:var(--brand);border:1px solid var(--border);box-shadow:var(--shadow)}
.to-top[hidden]{display:none}
.to-top svg{width:22px;height:22px}
.to-top:hover{border-color:var(--brand)}

/* ---------- Buttons, badges, inputs ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:9px 18px;border-radius:11px;background:var(--brand);color:var(--on-brand);font:600 15px/1.2 var(--font-body);border:1px solid transparent;transition:transform .12s,box-shadow .15s,background .15s,border-color .15s;white-space:nowrap}
.btn:hover{background:var(--brand-2);box-shadow:0 10px 22px -10px color-mix(in srgb,var(--brand) 70%,transparent);transform:translateY(-1px)}
.btn:active{transform:none}
.btn[disabled]{opacity:.45;pointer-events:none}
.btn.outline{background:var(--paper);color:var(--ink);border-color:var(--border-2)}
.btn.outline:hover{border-color:var(--brand);color:var(--brand);box-shadow:none}
.btn.ghost{background:transparent;color:var(--ink-2);border-color:transparent}
.btn.ghost:hover{background:var(--paper-2);box-shadow:none}
.btn.accent{background:var(--accent);color:#fff}
.btn.small{min-height:34px;padding:6px 13px;font-size:14px;border-radius:9px}
.btn.on{background:var(--brand-soft);color:var(--brand);border-color:transparent}
.btn.on:hover{background:var(--brand-soft);box-shadow:none}
.linkbtn{background:none;border:0;padding:0;color:var(--brand);font-weight:600;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.linkbtn[disabled]{color:var(--faint);text-decoration:none;cursor:default}
.badge{display:inline-flex;align-items:center;gap:5px;padding:2px 10px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font:600 12px/1.65 var(--font-body);white-space:nowrap}
.badge.accent{background:var(--accent-soft);color:var(--accent)}
.badge.ok{background:var(--ok-soft);color:var(--ok)}
.badge.bad{background:var(--bad-soft);color:var(--bad)}
.badge.plain{background:var(--paper-2);color:var(--muted);border:1px solid var(--border)}
.badge.subj{background:var(--tint);color:var(--color)}
.input,select,textarea{border:1px solid var(--border-2);background:var(--paper);border-radius:11px;padding:9px 12px;min-height:42px;font-size:15px;transition:border-color .15s,box-shadow .15s}
.input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 18%,transparent)}
textarea{width:100%;min-height:140px;resize:vertical;line-height:1.6}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 22px}
.chip{display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;border:1px solid var(--border);background:var(--paper);font:500 14px var(--font-body);color:var(--ink-2);transition:all .15s}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.active{background:var(--brand);border-color:var(--brand);color:var(--on-brand)}
.chip .n{font:600 11px var(--font-ui);opacity:.7;margin-left:5px}

/* ---------- Page heading ---------- */
.page-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin:10px 0 26px;padding-bottom:22px;border-bottom:1px solid var(--border);flex-wrap:wrap}
.page-heading h1{font-size:clamp(28px,3.4vw,40px);margin-top:6px}
.page-heading .subtext{max-width:760px;margin:8px 0 0;font-size:16px}
.date-stamp{font:500 12.5px/1.45 var(--font-body);color:var(--muted);text-align:right;border-left:3px solid var(--accent);padding-left:12px}
.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin:56px 0 20px}
.section-title h2{font-size:clamp(23px,2.4vw,28px)}
.section-title p{margin:4px 0 0}
.section-title .eyebrow{margin:0 0 4px}
.section-title > a{font:600 14.5px var(--font-body);color:var(--brand);white-space:nowrap}
.section-title > a:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- Panels ---------- */
.panel{background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm)}
.panel h3{font-size:18px;margin-bottom:12px}
.panel-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;gap:10px}
.panel-heading h2{font-size:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.notice{display:flex;gap:12px;align-items:flex-start;background:var(--info-soft);border-radius:12px;padding:14px 16px;font-size:14.5px;margin-bottom:20px;color:var(--ink-2)}
.notice svg{width:20px;height:20px;color:var(--info);flex:none;margin-top:2px}
.notice.ok-note{background:var(--ok-soft)}
.notice.ok-note svg{color:var(--ok)}
.fact-box{background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);border-radius:var(--radius);padding:16px 20px;margin-bottom:22px;font-size:15px}
.fact-box h3{font-size:17px;margin-bottom:6px}
.empty{grid-column:1/-1;text-align:center;padding:44px 20px;color:var(--muted);background:var(--paper);border:1px dashed var(--border-2);border-radius:var(--radius)}
.prose p{color:var(--ink-2);line-height:1.8}
.prose h3{font-size:18px;margin:20px 0 8px}
.prose ul{padding-left:20px}
.prose li{margin:6px 0;line-height:1.7}
.prose a{color:var(--brand)}

/* ---------- Subject cards (illustrated) ---------- */
.subject-card,.subject-hero,.today-card{--art-fill:var(--paper);--art-bg:var(--tint)}
.art .ln{fill:none;stroke:var(--color);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.art .fl{fill:var(--art-fill)}
.art .fl.ln{fill:var(--art-fill)}
.art .ac{fill:var(--color)}
.art .tx{fill:var(--color);font:700 15px var(--font-ui)}
.subject-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.subject-grid.apt-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.subject-card{position:relative;display:flex;flex-direction:column;overflow:hidden;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);transition:transform .18s,box-shadow .18s,border-color .18s}
.subject-card::before{content:"";position:absolute;left:0;top:0;right:0;height:3px;background:var(--color);z-index:1}
.subject-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--color) 45%,var(--border))}
.card-art{display:flex;align-items:flex-end;justify-content:center;height:116px;padding:12px 16px 0;background:var(--art-bg);border-bottom:1px solid var(--border)}
.card-art .art{width:auto;height:100px;max-width:100%;transition:transform .25s}
.subject-card:hover .card-art .art{transform:translateY(-3px) scale(1.03)}
.card-body{display:flex;flex-direction:column;flex:1;min-width:0;padding:16px 20px 18px}
.subject-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.subject-card h3{font-size:21px}
.subject-card .english{font:700 10.5px var(--font-ui);letter-spacing:.12em;color:var(--muted)}
.subject-card p{flex:1;margin:10px 0 14px;font-size:14.5px;line-height:1.6;color:var(--muted)}
.subject-meta{display:flex;gap:14px;font:500 13px var(--font-body);color:var(--ink-2);border-top:1px solid var(--border);padding-top:12px}
.subject-meta b{font-family:var(--font-ui)}
.mini-track{height:5px;background:var(--paper-2);border-radius:9px;overflow:hidden;margin-top:12px;border:1px solid var(--border)}
.mini-track span{display:block;height:100%;background:var(--color)}
.subject-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:13px;background:var(--tint);color:var(--color)}
.subject-icon svg{width:26px;height:26px}
.subject-card.wide{grid-column:1/-1;display:grid;grid-template-columns:260px minmax(0,1.15fr) minmax(0,1fr);gap:0;align-items:stretch;background:var(--paper)}
.subject-card.wide .card-art{height:auto;min-height:190px;align-items:center;border-bottom:0;border-right:1px solid var(--border)}
.subject-card.wide .card-art .art{height:150px}
.subject-card.wide p{flex:none;margin-bottom:0}
.wide-main,.wide-side{min-width:0;display:flex;flex-direction:column}
.subject-card.wide .wide-side{justify-content:center}
.topic-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.topic-chips span{font:500 13.5px var(--font-body);padding:5px 12px;border-radius:999px;background:var(--paper);border:1px solid color-mix(in srgb,var(--color) 35%,transparent);color:var(--ink-2)}

/* Dark-mode tints for subject colours */
:root[data-theme="dark"] .subject-icon,:root[data-theme="dark"] .badge.subj,:root[data-theme="dark"] .tn-ic,:root[data-theme="dark"] .cat-tile b{background:color-mix(in srgb,var(--color,var(--brand)) 20%,transparent)}
:root[data-theme="dark"] .subject-card,:root[data-theme="dark"] .subject-hero,:root[data-theme="dark"] .today-card{--art-fill:var(--paper);--art-bg:color-mix(in srgb,var(--color) 14%,var(--paper))}
:root[data-theme="dark"] .badge.subj,:root[data-theme="dark"] .tn-ic,:root[data-theme="dark"] .subject-icon{color:color-mix(in srgb,var(--color) 55%,#fff)}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .subject-icon,:root:not([data-theme="light"]) .badge.subj,:root:not([data-theme="light"]) .tn-ic,:root:not([data-theme="light"]) .cat-tile b{background:color-mix(in srgb,var(--color,var(--brand)) 20%,transparent)}
  :root:not([data-theme="light"]) .subject-card,:root:not([data-theme="light"]) .subject-hero,:root:not([data-theme="light"]) .today-card{--art-fill:var(--paper);--art-bg:color-mix(in srgb,var(--color) 14%,var(--paper))}
  :root:not([data-theme="light"]) .badge.subj,:root:not([data-theme="light"]) .tn-ic,:root:not([data-theme="light"]) .subject-icon{color:color-mix(in srgb,var(--color) 55%,#fff)}
}

/* ---------- Stats ---------- */
.stats-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:22px 0 0}
.stat{display:flex;align-items:center;gap:14px;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px}
.stat svg{width:36px;height:36px;padding:7px;border-radius:10px;background:var(--brand-soft);color:var(--brand);flex:none}
.stat strong{display:block;font:700 23px/1.1 var(--font-ui)}
.stat span{font-size:13.5px;color:var(--muted)}

/* ---------- Lesson cards / list ---------- */
.lesson-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:16px}
.lesson-card{display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:18px 18px 14px;transition:box-shadow .18s,border-color .18s,transform .18s}
.lesson-card:hover{box-shadow:var(--shadow);border-color:var(--border-2);transform:translateY(-2px)}
.lesson-card h3{font-size:18.5px;margin:10px 0 6px;line-height:1.4}
.lesson-card .lc-body:hover h3{color:var(--brand)}
.lesson-card p{font-size:14.5px;color:var(--muted);margin:0 0 12px}
.lesson-card .lc-body{flex:1}
.lesson-meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;font:500 13px var(--font-body);color:var(--muted)}
.lesson-card footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--border);padding-top:10px;margin-top:8px}
.bm{font-size:19px;color:var(--accent)}
.lesson-list{background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.lesson-row{display:grid;grid-template-columns:42px 1fr auto;gap:14px;align-items:center;padding:14px 18px;border-bottom:1px solid var(--border);transition:background .12s}
.lesson-row:last-child{border-bottom:0}
.lesson-row:hover{background:var(--paper-2)}
.lesson-row .idx{font:700 13px var(--font-ui);color:var(--faint);text-align:center;font-variant-numeric:tabular-nums}
.lesson-row .idx.done{color:var(--ok)}
.lesson-row strong{display:block;font-weight:600;font-size:16px;line-height:1.4}
.lesson-row small{color:var(--muted);font-size:13px}
.view-toggle{display:inline-flex;border:1px solid var(--border-2);border-radius:11px;overflow:hidden;background:var(--paper)}
.view-toggle button{padding:8px 13px;font-size:13.5px;color:var(--muted)}
.view-toggle button.active{background:var(--brand-soft);color:var(--brand);font-weight:600}

/* Toolbar */
.toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:10px}
.toolbar .input[type=search]{flex:1;min-width:220px}
.toolbar .spacer{flex:1}

/* Subject header */
.subject-hero{display:grid;grid-template-columns:auto 1fr auto auto;gap:22px;align-items:center;background:var(--paper);border:1px solid var(--border);border-radius:20px;padding:26px 28px;position:relative;overflow:hidden;margin-bottom:22px;box-shadow:var(--shadow-sm)}
.subject-hero::before{content:"";position:absolute;inset:0 auto 0 0;width:5px;background:var(--color)}
.subject-hero .subject-icon{width:64px;height:64px;border-radius:17px}
.subject-hero .subject-icon svg{width:34px;height:34px}
.subject-hero h1{font-size:clamp(26px,3vw,36px)}
.subject-hero p{margin:6px 0 0;color:var(--muted)}
.subject-hero-art{width:190px;height:114px;border-radius:14px;background:var(--art-bg);display:flex;align-items:flex-end;justify-content:center;padding:6px 10px 0}
.subject-hero-art .art{width:100%;height:auto}
.ring{--p:0;width:86px;height:86px;border-radius:50%;background:conic-gradient(var(--color) calc(var(--p)*1%),var(--paper-2) 0);display:grid;place-items:center;border:1px solid var(--border);flex:none}
.ring span{width:68px;height:68px;border-radius:50%;background:var(--paper);display:grid;place-items:center;align-content:center;font:700 16px var(--font-ui);text-align:center;line-height:1.1}
.ring small{display:block;font:500 10px var(--font-body);color:var(--muted)}
.cat-overview{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin-bottom:22px}
.cat-tile{display:flex;justify-content:space-between;align-items:center;gap:10px;background:var(--paper);border:1px solid var(--border);border-radius:12px;padding:12px 14px;font-weight:500;text-align:left;transition:border-color .15s}
.cat-tile:hover{border-color:var(--color)}
.cat-tile b{font:700 13px var(--font-ui);color:var(--color);background:var(--tint);border-radius:7px;padding:2px 8px}

/* ---------- Reader ---------- */
.reader-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:40px;align-items:start}
.article{min-width:0;font-size:var(--reading)}
.article-head{border-bottom:1px solid var(--border);padding-bottom:22px;margin-bottom:24px}
.article-head .back{font:500 14px var(--font-body);color:var(--muted);display:inline-flex;gap:6px;margin-bottom:14px}
.article-head .back:hover{color:var(--brand)}
.article h1{font-size:clamp(28px,3.6vw,42px);line-height:1.22;margin:12px 0 6px}
.article .en-title{font:600 13px var(--font-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.reader-controls{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:18px}
.glance{display:grid;grid-template-columns:1.4fr 1fr;border:1px solid var(--border);border-radius:var(--radius);background:var(--paper);overflow:hidden;margin-bottom:28px}
.glance > div{padding:20px 22px}
.glance .objectives{border-right:1px solid var(--border);background:linear-gradient(180deg,var(--brand-soft),transparent 80%)}
.glance h4{font:700 12px var(--font-ui);letter-spacing:.04em;text-transform:uppercase;color:var(--accent);margin-bottom:10px}
.glance ul{margin:0;padding:0;list-style:none}
.glance li{position:relative;padding-left:26px;margin:7px 0;font-size:15.5px;line-height:1.5}
.glance .objectives li::before{content:"";position:absolute;left:2px;top:6px;width:14px;height:14px;border-radius:4px;border:2px solid var(--brand);opacity:.8}
.glance dl{display:grid;grid-template-columns:auto 1fr;gap:8px 14px;margin:0;font-size:15px}
.glance dt{color:var(--muted)}
.glance dd{margin:0;font-weight:600}
.lead{font-size:1.12em;line-height:1.75;color:var(--ink-2);border-left:3px solid var(--accent);padding:4px 0 4px 18px;margin:0 0 30px}
.article-section{margin:0 0 36px;scroll-margin-top:calc(var(--header) + 18px)}
.article-section > h2{font-size:1.4em;margin-bottom:14px;display:flex;gap:12px;align-items:baseline}
.article-section > h2 .sn{font:700 .6em var(--font-ui);color:var(--brand);background:var(--brand-soft);border-radius:8px;padding:4px 9px;flex:none;transform:translateY(-2px)}
.article-section p{line-height:1.88;color:var(--ink)}
.article-section ul.bul{padding-left:0;list-style:none;margin:0 0 1em}
.article-section ul.bul li{position:relative;padding-left:24px;margin:8px 0;line-height:1.72}
.article-section ul.bul li::before{content:"";position:absolute;left:6px;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--brand)}
.deep-tag{font:600 11px var(--font-ui);letter-spacing:.02em;white-space:nowrap;flex-shrink:0;align-self:center;color:var(--info);background:var(--info-soft);border-radius:6px;padding:3px 8px;margin-left:auto}
.block{border:1px solid var(--border);border-radius:var(--radius);background:var(--paper);padding:22px 24px;margin:0 0 30px;scroll-margin-top:calc(var(--header) + 18px)}
.block > h2{font-size:1.22em;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.block > h2 svg{width:22px;height:22px;color:var(--accent);flex:none}
.block.tint-green{background:var(--brand-soft);border-color:transparent}
.block.tint-accent{background:var(--accent-soft);border-color:transparent}
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:12px;background:var(--paper)}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--border);line-height:1.55}
th{background:var(--paper-2);font-weight:600;font-family:var(--font-body);color:var(--ink);white-space:nowrap}
tbody tr:hover td{background:color-mix(in srgb,var(--brand-soft) 45%,transparent)}
tr:last-child td{border-bottom:0}
td:first-child{font-weight:600}
.terms{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.term{border:1px solid var(--border);border-radius:12px;padding:14px 16px;background:var(--paper-2)}
.term strong{display:block;font-size:16.5px}
.term em{font:500 12.5px var(--font-ui);color:var(--muted);font-style:normal;display:block;margin:1px 0 6px}
.term p{margin:0;font-size:15px;line-height:1.6;color:var(--ink-2)}
.timeline{position:relative;margin:4px 0 0;padding-left:0;list-style:none}
.timeline li{position:relative;display:grid;grid-template-columns:120px 1fr;gap:18px;padding:0 0 16px}
.timeline li::before{content:"";position:absolute;left:131px;top:8px;width:11px;height:11px;border-radius:50%;background:var(--paper);border:3px solid var(--brand);z-index:1}
.timeline li::after{content:"";position:absolute;left:136px;top:16px;bottom:-6px;width:2px;background:var(--border)}
.timeline li:last-child::after{display:none}
.timeline .yr{font:700 14px/1.6 var(--font-ui);color:var(--brand);text-align:right;padding-right:6px}
.timeline .ev{padding-left:20px;font-size:15.5px;line-height:1.6}
.mistakes{display:grid;gap:12px}
.mistake{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--border);border-radius:12px;overflow:hidden}
.mistake > div{padding:13px 16px;font-size:15px;line-height:1.6}
.mistake .wrong{background:var(--bad-soft)}
.mistake .right{background:var(--ok-soft)}
.mistake b{display:block;font:700 11.5px var(--font-ui);letter-spacing:.02em;text-transform:uppercase;margin-bottom:3px}
.mistake .wrong b{color:var(--bad)}
.mistake .right b{color:var(--ok)}
.focus-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.focus-col{background:var(--paper);border:1px solid var(--border);border-radius:12px;padding:16px 18px}
.focus-col h3{font-size:15.5px;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.focus-col ul,.fact-list,.summary-list{margin:0;padding-left:20px}
.focus-col li,.fact-list li{margin:6px 0;font-size:15.5px;line-height:1.6}
.summary-list{counter-reset:s;list-style:none;padding:0}
.summary-list li{counter-increment:s;position:relative;padding:10px 0 10px 44px;border-bottom:1px dashed var(--border-2);font-size:15.5px;line-height:1.6}
.summary-list li:last-child{border-bottom:0}
.summary-list li::before{content:counter(s);position:absolute;left:0;top:9px;width:28px;height:28px;border-radius:8px;background:var(--brand);color:var(--on-brand);display:grid;place-items:center;font:700 13px var(--font-ui)}
.question-block{border:1px solid var(--border);border-radius:14px;padding:18px;margin:0 0 14px;background:var(--paper)}
.question-block > strong{display:block;font-size:16.5px;line-height:1.55;margin-bottom:12px;font-weight:600}
.option{display:flex;align-items:flex-start;gap:12px;width:100%;text-align:left;padding:11px 14px;margin:7px 0;border:1px solid var(--border-2);border-radius:11px;background:var(--paper);font-size:15.5px;line-height:1.5;transition:border-color .12s,background .12s}
.option:hover:not([disabled]){border-color:var(--brand);background:var(--brand-soft)}
.option > span{display:grid;place-items:center;flex:none;width:26px;height:26px;border-radius:7px;background:var(--paper-2);border:1px solid var(--border);font:700 12.5px var(--font-ui)}
.option.selected{border-color:var(--brand);background:var(--brand-soft)}
.option.correct{border-color:var(--ok);background:var(--ok-soft)}
.option.correct > span{background:var(--ok);color:#fff;border-color:var(--ok)}
.option.wrong{border-color:var(--bad);background:var(--bad-soft)}
.option.wrong > span{background:var(--bad);color:#fff;border-color:var(--bad)}
.option[disabled]{cursor:default}
.explanation{margin-top:12px;padding:12px 14px;border-radius:10px;background:var(--info-soft);font-size:15px;line-height:1.65}
.explanation b{color:var(--info)}
.q-score{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.mains-q{border-left:3px solid var(--brand);background:var(--paper);border-radius:0 12px 12px 0;padding:14px 18px;margin:0 0 12px;border-top:1px solid var(--border);border-right:1px solid var(--border);border-bottom:1px solid var(--border)}
.mains-q p{margin:0;font-weight:500;line-height:1.65}
.mains-q details{margin-top:10px}
.mains-q summary{cursor:pointer;font:600 14px var(--font-body);color:var(--brand)}
.mains-q .outline{margin-top:8px;font-size:15px;color:var(--ink-2);line-height:1.7;background:var(--paper-2);padding:10px 14px;border-radius:9px}
.mains-q .outline ol{margin:0;padding-left:20px}
.mains-q .outline li{margin-bottom:4px}
.source-links{display:flex;flex-wrap:wrap;gap:10px}
.source-links a{border:1px solid var(--border);background:var(--paper);border-radius:10px;padding:8px 14px;font-size:14.5px;color:var(--brand);font-weight:500}
.source-links a:hover{border-color:var(--brand)}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:34px}
.pager a{border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;background:var(--paper);transition:border-color .15s,box-shadow .15s}
.pager a:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.pager small{display:block;color:var(--muted);font-size:13px}
.pager strong{font-weight:600;line-height:1.4;display:block;margin-top:2px}
.pager .next{text-align:right;grid-column:2}
.toc{position:sticky;top:calc(var(--header) + 18px);max-height:calc(100vh - var(--header) - 36px);overflow-y:auto;scrollbar-width:thin;font-size:14.5px}
.toc .panel{padding:18px}
.toc h4{font:700 12px var(--font-ui);letter-spacing:.04em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.toc a{display:block;padding:6px 10px;border-left:2px solid var(--border);color:var(--muted);line-height:1.4}
.toc a:hover{color:var(--ink)}
.toc a.active{border-left-color:var(--brand);color:var(--brand);font-weight:600;background:var(--brand-soft);border-radius:0 8px 8px 0}
.toc .toc-sub{font:700 11.5px var(--font-ui);letter-spacing:.02em;color:var(--faint);margin:12px 0 4px;text-transform:uppercase}
.toc-progress{margin-top:14px;font-size:13px;color:var(--muted)}
.mobile-toc{display:none}
body.font-small{--reading:16px}
body.font-large{--reading:19.5px}
body.font-xl{--reading:21px}

/* ---------- Syllabus ---------- */
.syllabus-section{margin-bottom:30px}
details.syl{background:var(--paper);border:1px solid var(--border);border-radius:12px;margin:10px 0;overflow:hidden}
details.syl > summary{list-style:none;cursor:pointer;padding:14px 18px;font-weight:600;display:flex;justify-content:space-between;align-items:center;gap:10px}
details.syl > summary::-webkit-details-marker{display:none}
details.syl > summary::after{content:"+";font:600 18px var(--font-ui);color:var(--muted)}
details.syl[open] > summary::after{content:"−"}
details.syl > summary .badge{margin-left:auto}
.syllabus-lesson{display:flex;justify-content:space-between;gap:14px;padding:11px 18px;border-top:1px solid var(--border);font-size:15.5px}
.syllabus-lesson:hover{background:var(--paper-2)}
.syllabus-lesson span{color:var(--muted);font-size:13px;white-space:nowrap}
.syllabus-lesson .done{color:var(--ok);font-weight:700}

/* ---------- Exams ---------- */
.tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid var(--border);margin-bottom:22px}
.tab{padding:10px 16px;font:600 15px var(--font-body);color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--brand);border-bottom-color:var(--brand)}
.exam-head{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:start;margin-bottom:22px}
.exam-head h2{font-size:28px}
.kv{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:18px 0 26px}
.kv div{background:var(--paper);border:1px solid var(--border);border-radius:12px;padding:12px 14px}
.kv small{display:block;color:var(--muted);font-size:12.5px}
.kv b{font:700 17px var(--font-ui)}
.stage{margin-bottom:26px}
.stage h3{font-size:19px;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.stage h3 .badge{font-family:var(--font-ui)}
.map-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}
.map-list a{display:flex;justify-content:space-between;gap:10px;border:1px solid var(--border);background:var(--paper);border-radius:10px;padding:10px 14px;font-size:14.5px}
.map-list a:hover{border-color:var(--brand)}
.strategy li{margin:8px 0;line-height:1.65}

/* ---------- Glossary / Revision / Timeline ---------- */
.az{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 18px}
.az button{min-width:36px;height:34px;border:1px solid var(--border);border-radius:8px;background:var(--paper);font:600 14px var(--font-body);color:var(--ink-2)}
.az button:hover{border-color:var(--brand)}
.az button.active{background:var(--brand);color:var(--on-brand);border-color:var(--brand)}
.gloss-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px}
.gloss-grid .term{background:var(--paper)}
.gloss-grid .term a{display:inline-block;margin-top:8px;font-size:13px;color:var(--brand);font-weight:500}
.rev-lesson{background:var(--paper);border:1px solid var(--border);border-radius:12px;margin:0 0 12px;overflow:hidden}
.rev-lesson > summary{list-style:none;cursor:pointer;padding:14px 18px;display:flex;align-items:center;gap:12px}
.rev-lesson > summary::-webkit-details-marker{display:none}
.rev-lesson > summary strong{flex:1;font-weight:600;line-height:1.4}
.rev-lesson .rev-body{padding:0 18px 16px;border-top:1px solid var(--border)}
.rev-lesson .rev-body h5{font:700 11.5px var(--font-ui);letter-spacing:.02em;text-transform:uppercase;color:var(--accent);margin:14px 0 6px}
.rev-lesson .rev-body ul{margin:0;padding-left:20px}
.rev-lesson .rev-body li{margin:5px 0;font-size:15px;line-height:1.6}
.big-timeline{position:relative;padding-left:0;list-style:none;margin:0}
.big-timeline li{display:grid;grid-template-columns:150px 1fr;gap:26px;position:relative;padding-bottom:18px}
.big-timeline li::before{content:"";position:absolute;left:161px;top:9px;width:12px;height:12px;border-radius:50%;background:var(--paper);border:3px solid var(--brand);z-index:1}
.big-timeline li::after{content:"";position:absolute;left:167px;top:18px;bottom:-8px;width:2px;background:var(--border)}
.big-timeline li:last-child::after{display:none}
.big-timeline .yr{font:700 15px/1.6 var(--font-ui);text-align:right;color:var(--brand)}
.big-timeline .ev{background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:10px 14px;font-size:15.5px;line-height:1.55}
.big-timeline .ev a{display:block;font-size:12.5px;color:var(--muted);margin-top:4px}
.era-head{font:700 20px var(--font-head);margin:26px 0 14px;padding-left:176px}

/* ---------- Practice / Quiz ---------- */
.quiz-settings{display:flex;flex-wrap:wrap;gap:16px;margin:8px 0 10px}
.quiz-settings label{display:flex;flex-direction:column;gap:5px;font-size:13.5px;color:var(--muted);font-weight:500}
.quiz-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.quiz-box{display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:box-shadow .15s,border-color .15s}
.quiz-box:hover{box-shadow:var(--shadow);border-color:var(--border-2)}
.quiz-box h3{font-size:19px;margin:12px 0 6px}
.quiz-box p{flex:1;font-size:14.5px;color:var(--muted)}
.quiz-box .subject-icon{width:44px;height:44px}
dialog{border:0;border-radius:20px;padding:0;width:min(760px,calc(100vw - 24px));max-height:calc(100vh - 40px);background:var(--paper);color:var(--ink);box-shadow:var(--shadow-lg)}
dialog::backdrop{background:rgba(10,8,6,.55);backdrop-filter:blur(4px)}
#quiz-content,#search-dialog{padding:22px 24px}
.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px}
.dialog-head strong{font:700 19px var(--font-head)}
#global-input{width:100%;height:52px;font-size:17px;border:1px solid var(--border-2);border-radius:13px;padding:0 16px;background:var(--paper-2)}
#global-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 18%,transparent)}
.search-tabs{display:flex;gap:6px;margin:12px 0 6px;flex-wrap:wrap}
.search-result{display:block;padding:12px 14px;border-radius:11px;border:1px solid transparent}
.search-result:hover,.search-result:focus{background:var(--paper-2);border-color:var(--border);outline:none}
.search-result strong{display:block;font-weight:600;line-height:1.4}
.search-result small{color:var(--muted);font-size:13px}
.search-result mark{background:var(--accent-soft);color:inherit;border-radius:3px;padding:0 2px}
.quiz-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.quiz-timer{font:700 15px var(--font-ui);background:var(--accent-soft);color:var(--accent);padding:4px 10px;border-radius:8px}
.quiz-palette{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0 4px}
.quiz-palette button{width:34px;height:34px;border-radius:8px;border:1px solid var(--border-2);font:600 13px var(--font-ui);background:var(--paper)}
.quiz-palette button.answered{background:var(--brand-soft);border-color:var(--brand);color:var(--brand)}
.quiz-palette button.current{outline:2px solid var(--accent);outline-offset:1px}
.quiz-result{font:800 52px/1 var(--font-ui);color:var(--brand);margin:8px 0}
.result-bars{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0 20px}
.result-bars div{border-radius:12px;padding:12px;text-align:center}
.result-bars b{display:block;font:700 22px var(--font-ui)}
.review-item{border-top:1px solid var(--border);padding:16px 0}
.review-item strong{display:block;margin:8px 0;font-weight:600;line-height:1.5}
.review-item p{font-size:15px;margin:0 0 8px}
#confirm-dialog{width:min(440px,calc(100vw - 32px))}
.confirm-box{padding:22px 24px}
.confirm-box p{font-size:16.5px;line-height:1.6;margin:0 0 6px}

/* Flashcards */
.flash-wrap{max-width:720px;margin:0 auto}
.flashcard{position:relative;min-height:300px;background:var(--paper);border:1px solid var(--border);border-radius:22px;padding:36px 34px;box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:center;text-align:center;cursor:pointer;background-image:radial-gradient(500px 200px at 50% 0,var(--brand-soft),transparent 70%)}
.flashcard h2{font-size:clamp(20px,2.6vw,26px);line-height:1.45;margin:12px 0}
.flashcard .answer{font-size:18px;font-weight:600;color:var(--brand);margin:8px 0}
.flashcard .exp{color:var(--muted);font-size:15.5px}
.flash-controls{display:flex;justify-content:center;gap:10px;margin-top:18px;flex-wrap:wrap}

/* Planner / progress */
.planner-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:20px}
.task-row{display:flex;gap:12px;align-items:flex-start;padding:11px 0;border-bottom:1px solid var(--border)}
.task-row input{margin-top:6px;width:18px;height:18px;accent-color:var(--brand)}
.task-row label{flex:1;line-height:1.45}
.task-row.done label{text-decoration:line-through;color:var(--muted)}
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:22px}
.metric{background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.metric strong{display:block;font:800 28px/1.1 var(--font-ui);color:var(--brand)}
.metric span{color:var(--muted);font-size:14px}
.heat{display:grid;grid-template-columns:repeat(15,1fr);gap:4px;margin-top:10px}
.heat i{aspect-ratio:1;border-radius:4px;background:var(--paper-2);border:1px solid var(--border)}
.heat i.l1{background:color-mix(in srgb,var(--brand) 30%,transparent)}
.heat i.l2{background:color-mix(in srgb,var(--brand) 60%,transparent)}
.heat i.l3{background:var(--brand)}
.plan-week{border:1px solid var(--border);border-radius:12px;padding:14px 16px;background:var(--paper);margin-bottom:10px}
.plan-week h4{font-size:16px;margin-bottom:6px}
.plan-week p{margin:0;font-size:14.5px;color:var(--muted)}

/* Sources */
.source-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.source-card{background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column}
.source-card h3{font-size:17px;margin-bottom:6px}
.source-card p{font-size:14.5px;color:var(--muted);flex:1}
.source-card a{color:var(--brand);font-weight:600;font-size:14.5px}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--border);background:var(--paper);padding:44px 24px 24px;margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px;max-width:calc(var(--wrap) - 48px);margin:0 auto}
.footer-grid h4{font:700 12px var(--font-ui);letter-spacing:.04em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.footer-grid a:not(.brand){display:block;font-size:14.5px;color:var(--ink-2);margin:6px 0}
.footer-grid a:not(.brand):hover{color:var(--brand)}
.footer-grid p{font-size:14.5px;color:var(--muted);margin:14px 0 14px;max-width:360px}
.footer-exams{display:flex;flex-wrap:wrap;gap:6px}
.footer-exams span{font:600 12px var(--font-ui);padding:3px 10px;border-radius:999px;background:var(--paper-2);border:1px solid var(--border);color:var(--ink-2)}
.footer-note{max-width:calc(var(--wrap) - 48px);margin:28px auto 0;padding-top:18px;border-top:1px solid var(--border);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--faint)}

/* Toast */
#toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);opacity:0;background:var(--ink);color:var(--bg);padding:11px 18px;border-radius:12px;font-size:14.5px;z-index:90;transition:all .25s;pointer-events:none;box-shadow:var(--shadow-lg);max-width:calc(100vw - 32px)}
#toast.visible{opacity:1;transform:translate(-50%,0)}
.bottom-nav{display:none}

/* ==========================================================
   Homepage
   ========================================================== */
.hero{position:relative;overflow:hidden;isolation:isolate;border-radius:calc(var(--radius) + 12px);padding:48px 48px 0;color:#fff;background:
  radial-gradient(900px 460px at 88% -12%,color-mix(in srgb,var(--c-brand) 62%,transparent),transparent 62%),
  radial-gradient(640px 420px at -6% 112%,color-mix(in srgb,var(--c-accent) 38%,transparent),transparent 62%),
  linear-gradient(160deg,color-mix(in srgb,var(--c-hero) 82%,var(--c-brand)) 0%,var(--c-hero) 52%,color-mix(in srgb,var(--c-hero) 80%,#000) 100%);box-shadow:var(--shadow-lg)}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:44px 44px;-webkit-mask-image:radial-gradient(800px 420px at 70% 20%,#000,transparent 75%);mask-image:radial-gradient(800px 420px at 70% 20%,#000,transparent 75%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(330px,.85fr);gap:48px;align-items:center}
.hero-copy{min-width:0}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;margin:0 0 20px;padding:6px 14px 6px 12px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);font:600 13.5px/1.3 var(--font-body);color:rgba(255,255,255,.84)}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--c-hl);box-shadow:0 0 0 0 color-mix(in srgb,var(--c-hl) 60%,transparent);animation:pulse 2.2s infinite;flex:none}
@keyframes pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--c-hl) 55%,transparent)}70%{box-shadow:0 0 0 9px transparent}100%{box-shadow:0 0 0 0 transparent}}
.brand-title{display:flex;flex-direction:column;gap:8px;margin:0 0 18px}
.brand-title .bt-hi{font:800 clamp(50px,6.4vw,84px)/1.02 var(--font-head);color:#fff;letter-spacing:-.01em;background:linear-gradient(180deg,#fff 30%,color-mix(in srgb,var(--c-hl) 35%,#fff));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;padding-top:.08em}
.brand-title .bt-en{display:flex;align-items:center;gap:14px;font:700 clamp(12.5px,1.3vw,15px)/1.2 var(--font-ui);letter-spacing:.32em;text-transform:uppercase;color:var(--gold)}
.brand-title .bt-en::before{content:"";width:40px;height:2px;border-radius:2px;background:currentColor;opacity:.8;flex:none}
.hero-lede{margin:0 0 22px;max-width:620px;font-size:17.5px;line-height:1.7;color:rgba(255,255,255,.76)}
.hero-roots{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:0 0 24px;max-width:640px}
.hero-roots div{min-width:0;padding:11px 14px 12px;border-radius:14px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);transition:background .15s,border-color .15s}
.hero-roots div:hover{background:rgba(255,255,255,.1);border-color:color-mix(in srgb,var(--c-hl) 55%,transparent)}
.hero-roots dt{font:800 20px/1.1 var(--font-ui);letter-spacing:-.02em}
.hero-roots dt a{color:#fff}
.hero-roots div:nth-child(2) dt a{color:color-mix(in srgb,var(--c-brand) 40%,#fff)}
.hero-roots div:nth-child(3) dt a{color:var(--gold)}
.hero-roots dt a::after{content:" →";font-weight:600;font-size:.7em;opacity:0;transition:opacity .15s}
.hero-roots div:hover dt a::after{opacity:.8}
.hero-roots dd{margin:5px 0 0;font-size:13.5px;line-height:1.45;color:rgba(255,255,255,.66)}
.hero-search{display:flex;align-items:center;gap:12px;width:min(600px,100%);min-height:58px;padding:0 10px 0 18px;border:0;border-radius:15px;background:#fff;color:#5f5a55;font:500 16.5px var(--font-body);text-align:left;cursor:text;box-shadow:0 16px 36px -14px rgba(0,0,0,.55);transition:box-shadow .15s}
.hero-search:hover{box-shadow:0 0 0 4px color-mix(in srgb,var(--c-hl) 45%,transparent),0 16px 36px -14px rgba(0,0,0,.55)}
.hero-search:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
.hero-search svg{width:21px;height:21px;color:var(--c-brand);flex:none}
.hero-search span{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hero-search kbd{font:600 12px var(--font-ui);border:1px solid #ddd;border-radius:7px;padding:4px 9px;color:#777;background:#f6f6f6}
.hero-quick{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;font-size:14px;color:rgba(255,255,255,.6)}
.hero-quick a{padding:4px 12px;border:1px solid rgba(255,255,255,.2);border-radius:999px;color:rgba(255,255,255,.9);font-size:14px;transition:background .15s,border-color .15s}
.hero-quick a:hover{background:rgba(255,255,255,.1);border-color:color-mix(in srgb,var(--c-hl) 60%,transparent)}
.hero-side{min-width:0}
.hero-side .today-card.dq{background:var(--paper);color:var(--ink);border:1px solid rgba(255,255,255,.18);border-radius:20px;padding:22px 22px 18px;box-shadow:0 28px 60px -24px rgba(0,0,0,.65)}
.dq-foot{margin:14px 0 0;padding-top:10px;border-top:1px solid var(--border);font-size:12.5px;color:var(--muted)}
.hero-figures{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));margin:40px -48px 0;background:rgba(0,0,0,.26);border-top:1px solid rgba(255,255,255,.1)}
.hero-figures div{padding:18px 24px 20px;border-left:1px solid rgba(255,255,255,.08)}
.hero-figures div:first-child{border-left:0;padding-left:48px}
.hero-figures dt{font-size:13.5px;color:rgba(255,255,255,.66)}
.hero-figures dd{margin:0}
.hero-figures dd.fig-num{font:800 30px/1.15 var(--font-ui);color:#fff;font-variant-numeric:tabular-nums;letter-spacing:-.02em;margin-top:2px}
.hero-figures dd.fig-note{font-size:12.5px;line-height:1.4;color:rgba(255,255,255,.5);margin-top:2px}

/* Exam picker */
.exam-strip{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.exam-chip{display:flex;flex-direction:column;gap:6px;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);padding:18px 18px 16px;transition:border-color .15s,box-shadow .15s,transform .15s}
.exam-chip:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-2px)}
.ex-top{display:flex;align-items:center;justify-content:space-between;gap:8px}
.exam-chip strong{font:800 18px var(--font-ui);color:var(--ink);letter-spacing:-.01em}
.ex-arrow{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--brand-soft);color:var(--brand);font:700 14px var(--font-ui);transition:transform .15s}
.exam-chip:hover .ex-arrow{transform:translateX(3px)}
.ex-full{font-size:13.5px;color:var(--muted);line-height:1.45;flex:1}
.ex-n{align-self:flex-start;margin-top:4px;font:600 12.5px var(--font-body);color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:2px 10px}

/* Today */
.today-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr) minmax(0,1fr);gap:18px;align-items:stretch}
.today-card{position:relative;display:flex;flex-direction:column;min-width:0;overflow:hidden;padding:22px;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius)}
.tc-label{display:inline-flex;align-items:center;gap:7px;margin-bottom:6px;font:700 13.5px var(--font-body);color:var(--accent)}
.tc-label svg{width:18px;height:18px}
.tc-head{display:flex;justify-content:space-between;align-items:center;gap:10px}
.today-card.cont .art.mini{position:absolute;right:-6px;top:8px;width:120px;height:auto;opacity:.95}
.today-card.cont h3{margin:4px 0 6px;padding-right:104px;font-size:20px;line-height:1.38}
.today-card.cont h3 a:hover{color:var(--brand)}
.today-card.cont p{margin:0 0 14px;color:var(--muted);font-size:14.5px}
.tc-stats{display:flex;flex-wrap:wrap;gap:22px;margin:auto 0 16px;padding-top:12px;border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
.tc-stats b{display:block;font:800 21px/1.1 var(--font-ui);color:var(--ink);font-variant-numeric:tabular-nums}
.today-card .btn{align-self:flex-start}
.dq-q{margin:6px 0 12px;font-size:16.5px;font-weight:600;line-height:1.5}
.dq-opts{display:grid;gap:8px}
.dq-opts button{display:flex;gap:10px;align-items:flex-start;width:100%;padding:9px 12px;border:1px solid var(--border-2);border-radius:11px;background:var(--paper);color:var(--ink);font:500 15px/1.45 var(--font-body);text-align:left;cursor:pointer;transition:border-color .12s,background .12s}
.dq-opts button span{flex:none;width:23px;height:23px;border-radius:7px;display:grid;place-items:center;background:var(--paper-2);border:1px solid var(--border);font-size:13px;font-weight:600}
.dq-opts button:hover:not(:disabled){border-color:var(--brand);background:var(--brand-soft)}
.dq-opts button:disabled{cursor:default}
.dq-opts button.right{border-color:var(--ok);background:var(--ok-soft)}
.dq-opts button.wrong{border-color:var(--bad);background:var(--bad-soft)}
.dq-exp{margin-top:12px;padding:10px 12px;border-radius:10px;background:var(--info-soft);font-size:14.5px;line-height:1.6;color:var(--ink-2)}
.dq-exp a{color:var(--brand);font-weight:600}
.words h3{margin:0;font-size:24px}
.words .en{font-size:13px;color:var(--muted)}
.words p{margin:8px 0 0;font-size:15px;line-height:1.6;color:var(--ink-2)}
.words hr{width:100%;margin:16px 0 12px;border:0;border-top:1px solid var(--border)}
.words a{margin-top:8px;font-size:13.5px;font-weight:600;color:var(--brand)}
.plan-ring{display:flex;align-items:center;gap:16px;margin:8px 0 14px}
.plan-ring .ring{width:78px;height:78px}
.plan-ring .ring span{width:62px;height:62px;font-size:15px}
.plan-ring b{display:block;font:800 21px/1.1 var(--font-ui)}
.plan-ring > div:last-child span{font-size:13.5px;color:var(--muted)}
.plan-tasks{margin:0 0 14px;padding:0;list-style:none;font-size:14.5px}
.plan-tasks li{padding:6px 0 6px 22px;position:relative;border-bottom:1px dashed var(--border)}
.plan-tasks li::before{content:"";position:absolute;left:2px;top:12px;width:11px;height:11px;border-radius:3px;border:2px solid var(--brand)}
.plan-next{margin:0 0 14px;font-size:14.5px;color:var(--muted);line-height:1.55}
.plan-next a{color:var(--ink);font-weight:600}
.plan-next a:hover{color:var(--brand)}
.today-card.plan .btn{margin-top:auto}

/* Tools */
.tool-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.tool{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;align-items:start;padding:16px 18px;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);transition:border-color .15s,box-shadow .15s,transform .15s}
.tool:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-2px)}
.tool-ic{grid-row:1/3;display:grid;place-items:center;width:44px;height:44px;border-radius:13px;background:var(--brand-soft);color:var(--brand);transition:background .15s,color .15s}
.tool:hover .tool-ic{background:var(--brand);color:var(--on-brand)}
.tool-ic svg{width:22px;height:22px}
.tool-b strong{display:block;font:600 16px/1.35 var(--font-body);color:var(--ink)}
.tool-b small{display:block;font-size:13.5px;line-height:1.45;color:var(--muted);margin-top:2px}
.tool-n{grid-column:2;font:600 12px var(--font-ui);color:var(--accent);margin-top:4px}

/* Feature callout (overrides cmap.css base) */
.cm-callout.feature{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:20px;align-items:center;padding:22px 24px;border:1px solid color-mix(in srgb,var(--brand) 22%,var(--border));border-left-width:1px;border-radius:20px;background:linear-gradient(110deg,var(--brand-soft),var(--paper) 75%);margin-top:28px}
.cmc-ic{display:grid;place-items:center;width:56px;height:56px;border-radius:16px;background:var(--brand);color:var(--on-brand)}
.cmc-ic svg{width:28px;height:28px}
.cm-callout.feature strong{font:700 19px var(--font-head)}

.apt-band{margin-top:6px}

/* Data band */
.data-band{margin-top:8px}
.data-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.dcard{display:flex;flex-direction:column;min-width:0;padding:18px 18px 16px;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);color:var(--ink);transition:border-color .15s,box-shadow .15s,transform .15s}
.dcard:hover{border-color:var(--border-2);box-shadow:var(--shadow);transform:translateY(-2px)}
.dc-head h3{margin:0;font:600 16px/1.35 var(--font-body)}
.dc-head span{display:block;font-size:13px;color:var(--muted);margin-top:1px}
.dc-head span b{font-weight:600;color:var(--ink-2)}
.dc-num{margin:10px 0 2px;font:800 34px/1 var(--font-ui);font-variant-numeric:tabular-nums;color:var(--ink);letter-spacing:-.02em}
.dc-num small{font-size:17px;font-weight:600;color:var(--muted);margin-left:2px}
.dc-delta{font:600 13px var(--font-body);color:var(--muted)}
.dc-delta.good{color:var(--ok)}
.dc-delta.bad{color:var(--bad)}
.dc-delta em{font-style:normal;font-weight:500;color:var(--muted)}
.dumbbell{display:block;width:100%;height:auto;margin:12px 0 0;overflow:visible}
.db-track{stroke:var(--border-2);stroke-width:2;stroke-linecap:round}
.db-tick{stroke:var(--border-2);stroke-width:1.2}
.db-link{stroke:var(--brand-2);stroke-width:3;stroke-linecap:round;opacity:.45}
.db-prev{fill:var(--paper);stroke:var(--muted);stroke-width:2}
.db-now{fill:var(--brand);stroke:var(--paper);stroke-width:2}
.dc-scale{position:relative;height:14px;margin-top:2px;font:500 11px var(--font-ui);color:var(--faint)}
.dc-scale span{position:absolute;top:0;transform:translateX(-50%)}
.dc-src{margin:10px 0 0;padding-top:10px;border-top:1px solid var(--border);font:500 12.5px var(--font-ui);color:var(--muted);display:flex;flex-wrap:wrap;gap:4px 14px;font-variant-numeric:tabular-nums}
.dc-src span{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.k-prev,.k-now{display:inline-block;width:9px;height:9px;border-radius:50%}
.k-prev{border:1.6px solid var(--muted);background:var(--paper)}
.k-now{background:var(--brand)}
.data-note{margin:12px 0 0;font-size:13px;color:var(--muted)}

/* Method */
.method{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:0;padding:0;list-style:none}
.method-step{position:relative;padding:22px 22px 24px;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius)}
.method-step:not(:last-child)::after{content:"→";position:absolute;right:-13px;top:28px;z-index:1;display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--paper);border:1px solid var(--border);font:700 12px var(--font-ui);color:var(--brand)}
.method-step .n{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--brand);color:var(--on-brand);font:800 15px var(--font-ui)}
.method-step h4{margin:14px 0 6px;font-size:19px}
.method-step p{margin:0;font-size:14.5px;color:var(--muted)}

/* Lower */
.lower-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:20px;margin-top:56px}
.news-row{display:block;padding:13px 10px;margin:0 -10px;border-bottom:1px solid var(--border);border-radius:10px}
.news-row:hover{background:var(--paper-2)}
.news-row:last-of-type{border-bottom:0}
.news-row strong{display:block;font-weight:600;line-height:1.45;margin-top:4px}
.news-row small{color:var(--muted);font-size:13px;margin-left:6px}
.progress-line{margin:12px 0}
.progress-line > div:first-child{display:flex;justify-content:space-between;font-size:14.5px;margin-bottom:5px}
.progress-line > div:first-child span:last-child{font:600 12.5px var(--font-ui);color:var(--muted)}
.progress-track{height:8px;background:var(--paper-2);border:1px solid var(--border);border-radius:9px;overflow:hidden}
.progress-track span{display:block;height:100%;background:var(--brand);border-radius:9px;transition:width .4s}
.daily-quote{margin-top:16px;padding:14px 16px;border-radius:12px;background:var(--paper-2);border:1px dashed var(--border-2);font-size:14.5px;color:var(--ink-2)}

/* Announcement bar (admin) */
.ann{display:flex;align-items:center;gap:12px;border-radius:14px;padding:11px 12px 11px 16px;margin:0 0 18px;font-size:15px;border:1px solid transparent;--a:var(--info);background:var(--info-soft);color:var(--ink)}
.ann p{margin:0;flex:1;min-width:0;line-height:1.5}
.ann a{color:var(--a);font-weight:600;white-space:nowrap;text-decoration:underline;text-underline-offset:3px}
.ann-dot{width:9px;height:9px;border-radius:50%;background:var(--a);flex:none;box-shadow:0 0 0 4px color-mix(in srgb,var(--a) 22%,transparent)}
.ann-x{width:32px;height:32px;border-radius:8px;flex:none;color:var(--muted);font-size:14px}
.ann-x:hover{background:color-mix(in srgb,var(--a) 14%,transparent);color:var(--ink)}
.ann-success{--a:var(--ok);background:var(--ok-soft)}
.ann-warning{--a:var(--accent);background:var(--accent-soft)}
.ann-urgent{--a:var(--bad);background:var(--bad-soft);border-color:color-mix(in srgb,var(--bad) 30%,transparent)}
.ann-info{border-color:color-mix(in srgb,var(--info) 22%,transparent)}

/* ==========================================================
   Student account, leaderboard, discussion, OTP
   ========================================================== */
body:not(.acc-on) .acc-only{display:none!important}
.account-btn{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 12px 0 6px;border-radius:999px;border:1px solid var(--border);background:var(--paper);color:var(--ink);font:600 14.5px var(--font-body);flex:none;box-shadow:var(--shadow-sm);white-space:nowrap}
.account-btn[hidden]{display:none}
.account-btn:hover{border-color:var(--border-2)}
.account-btn[data-state="out"]{padding:0 14px 0 10px;background:var(--brand);border-color:var(--brand);color:var(--on-brand)}
.account-btn svg{width:18px;height:18px}
.av{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font:700 14px/1 var(--font-body);flex:none}
.av.big{width:58px;height:58px;font-size:26px}
@media (max-width:860px){ .account-btn .acc-name{display:none} .account-btn,.account-btn[data-state="out"]{padding:0;width:40px;justify-content:center} }

#account-dialog{width:min(480px,calc(100vw - 24px))}
.acc-box{padding:22px 24px}
.acc-reason{background:var(--accent-soft);color:var(--ink-2);border-radius:10px;padding:10px 14px;margin:0 0 14px;font-size:15px}
.seg-tabs{display:grid;grid-template-columns:1fr 1fr;gap:4px;background:var(--paper-2);border:1px solid var(--border);border-radius:12px;padding:4px;margin-bottom:16px}
.seg-tabs button{border-radius:9px;padding:8px;font-weight:600;color:var(--muted)}
.seg-tabs button[aria-selected="true"]{background:var(--paper);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.1)}
.acc-form{display:grid;gap:12px}
.acc-form label{display:grid;gap:5px;font-weight:600;font-size:14.5px}
.acc-form .input,.acc-form select{width:100%;font-weight:400}
.acc-form .btn{justify-self:start}
.acc-box .acc-form .btn{justify-self:stretch}
.acc-err{margin:0;color:var(--bad);background:var(--bad-soft);border-radius:9px;padding:8px 12px;font-size:14.5px}
.acc-small{margin:0;font-size:13.5px;color:var(--muted);line-height:1.55}
.acc-perks{display:grid;gap:10px;margin-top:18px;padding-top:16px;border-top:1px solid var(--border)}
.acc-perks div{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--muted);line-height:1.45}
.acc-perks svg{width:20px;height:20px;color:var(--brand-2);flex:none;margin-top:1px}
.acc-perks b{display:block;color:var(--ink);font-weight:600}
.notice.ok-note{background:var(--ok-soft)}
.notice.ok-note svg{color:var(--ok)}
#lb-note:empty{display:none}
#lb-note .notice{margin:4px 0 18px}

/* अध्याय — प्रश्न और चर्चा */
.discuss h2 .sn svg{width:1.05em;height:1.05em;display:block}
.discuss .cm-n{font:600 13px var(--font-ui);color:var(--muted);margin-left:auto;align-self:center}
.cm-form{display:grid;gap:8px;margin:14px 0 18px}
.cm-form textarea{min-height:96px}
.cm-form-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.cm-form-foot .subtext{font-size:13px}
.cm-login{background:var(--paper-2);border:1px dashed var(--border-2);border-radius:12px;padding:14px 16px;margin:14px 0 18px}
.cm-login p{margin:0 0 10px}
.cm-list{display:grid;gap:12px}
.cm{border:1px solid var(--border);border-radius:12px;padding:14px 16px;background:var(--paper)}
.cm.pending{border-style:dashed;background:var(--paper-2)}
.cm-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.cm-head b{display:block;font-size:15px;line-height:1.3}
.cm-head small{color:var(--muted);font-size:13px}
.cm-head .badge{margin-left:auto}
.cm > p{margin:0;white-space:pre-wrap;overflow-wrap:anywhere}
.cm-reply{margin-top:12px;border-left:3px solid var(--brand-2);background:var(--brand-soft);border-radius:0 10px 10px 0;padding:10px 14px}
.cm-reply small{display:block;font:600 12px var(--font-ui);letter-spacing:.04em;color:var(--brand);margin-bottom:3px}
.cm-reply p{margin:0;white-space:pre-wrap;overflow-wrap:anywhere}
.cm .linkbtn{margin-top:10px;font-size:13.5px;color:var(--muted)}

/* लीडरबोर्ड */
.lb-tools{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-bottom:18px}
.lb-tools .chips{margin:0}
.lb-tools select{min-width:180px}
.lb-me{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin-bottom:18px}
.lb-me > div{background:var(--paper);padding:14px 16px;display:grid;gap:2px;align-content:start}
.lb-me > div:first-child{background:var(--brand);color:var(--on-brand)}
.lb-me > div:first-child small,.lb-me > div:first-child .subtext{color:rgba(255,255,255,.75)}
:root[data-theme="dark"] .lb-me > div:first-child{background:var(--brand-soft);color:var(--ink)}
:root[data-theme="dark"] .lb-me > div:first-child small,:root[data-theme="dark"] .lb-me > div:first-child .subtext{color:var(--muted)}
.lb-me small{font:600 11.5px var(--font-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.lb-me strong{font:700 26px/1.1 var(--font-ui);font-variant-numeric:tabular-nums}
.lb-me .subtext{font-size:13px}
.lb-table-wrap{border:1px solid var(--border);border-radius:var(--radius);overflow-x:auto;background:var(--paper)}
.lb-table{width:100%;border-collapse:collapse;font-size:15px}
.lb-table th,.lb-table td{padding:11px 14px;border-bottom:1px solid var(--border);text-align:left;vertical-align:middle}
.lb-table tr:last-child td{border-bottom:0}
.lb-table th{font:600 11.5px var(--font-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);background:var(--paper-2)}
.lb-table .n{text-align:right;font-variant-numeric:tabular-nums;font-family:var(--font-ui)}
.lb-table .r{width:64px;text-align:center;font:700 15px var(--font-ui);font-variant-numeric:tabular-nums}
.lb-table tr.top .r{font-size:20px}
.lb-table tr.me td{background:var(--accent-soft)}
.lb-table small.show-sm{display:none}
@media (max-width:600px){
  .lb-me{grid-template-columns:1fr 1fr}
  .lb-table .hide-sm{display:none}
  .lb-table small.show-sm{display:block;color:var(--muted);font-size:12.5px}
  .lb-table th,.lb-table td{padding:10px 8px}
  .lb-table .r{width:44px}
  .lb-tools select{width:100%}
}

/* मेरा खाता */
.acc-card{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.acc-id{flex:1;min-width:200px}
.acc-id h2{font-size:22px}
.acc-id .subtext{margin:4px 0 0}
.acc-sync{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.acc-cta{max-width:560px}
.acc-cta .subtext{margin:0}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]) .lb-me > div:first-child{background:var(--brand-soft);color:var(--ink)}
  :root:not([data-theme="light"]) .lb-me > div:first-child small,:root:not([data-theme="light"]) .lb-me > div:first-child .subtext{color:var(--muted)}
}

/* v5.7 — ईमेल OTP */
.otp-steps{list-style:none;display:flex;gap:6px;padding:0;margin:0 0 16px;counter-reset:o}
.otp-steps li{flex:1;counter-increment:o;font:600 12.5px var(--font-body);color:var(--faint);padding-top:8px;border-top:3px solid var(--border);margin:0}
.otp-steps li::before{content:counter(o) ". "}
.otp-steps li.on{color:var(--brand);border-top-color:var(--brand-2)}
.otp-sent{margin:0;font-size:14.5px;background:var(--paper-2);border:1px solid var(--border);border-radius:10px;padding:10px 12px;overflow-wrap:anywhere}
.otp-sent.ok{background:var(--ok-soft);border-color:transparent;color:var(--ink)}
.otp-input{font:700 26px/1.2 var(--font-ui)!important;letter-spacing:.5em;text-align:center;padding-left:.5em!important;font-variant-numeric:tabular-nums}
.otp-input::placeholder{letter-spacing:.3em;color:var(--faint)}
.acc-alt{margin-top:14px;text-align:center}


/* ==========================================================
   Responsive
   ========================================================== */
@media (max-width:1280px){
  .topnav .tn-link[data-nav="cmap"]{display:none}
  .global-search{width:160px}
}
@media (max-width:1180px){
  .topnav{display:none}
  .global-search{width:min(300px,34vw)}
  .reader-layout{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
  .mobile-toc{display:block;margin-bottom:24px}
  .mobile-toc summary{cursor:pointer;font-weight:600;padding:12px 16px;background:var(--paper);border:1px solid var(--border);border-radius:12px}
  .mobile-toc .toc-links{background:var(--paper);border:1px solid var(--border);border-top:0;border-radius:0 0 12px 12px;padding:8px 10px;margin-top:-8px}
  .mobile-toc a{display:block;padding:7px 8px;color:var(--ink-2);font-size:15px}
  .exam-strip{grid-template-columns:repeat(3,minmax(0,1fr))}
  .hero-grid{grid-template-columns:minmax(0,1fr) minmax(300px,.8fr);gap:32px}
  .hero-figures{grid-template-columns:repeat(5,minmax(0,1fr))}
  .hero-figures div{padding:16px 16px 18px}
  .hero-figures div:first-child{padding-left:48px}
  .today-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .today-card.cont{grid-column:1/-1}
  .tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .data-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .subject-hero-art{display:none}
  .subject-hero{grid-template-columns:auto 1fr auto}
}
@media (max-width:1024px){
  .subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stats-row,.metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lower-grid,.planner-grid{grid-template-columns:1fr}
  .kv{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero{padding:40px 34px 0}
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .hero-side .today-card.dq{max-width:640px}
  .hero-figures{margin:34px -34px 0;grid-template-columns:repeat(3,minmax(0,1fr))}
  .hero-figures div,.hero-figures div:first-child{padding:14px 20px 16px;border-left:0;border-top:1px solid rgba(255,255,255,.08)}
  .hero-figures div:nth-child(-n+3){border-top:0}
  .method{grid-template-columns:repeat(2,minmax(0,1fr))}
  .method-step::after{display:none}
  .subject-card.wide{grid-template-columns:200px minmax(0,1fr)}
  .subject-card.wide .wide-side{grid-column:2;padding-top:0}
  .subject-card.wide .card-art{grid-row:1/3}
  .cm-callout.feature{grid-template-columns:auto minmax(0,1fr)}
  .cm-callout.feature .reader-controls{grid-column:1/-1}
}
@media (max-width:860px){
  :root{--header:60px}
  .topbar-in{padding:0 12px;gap:6px}
  .menu-btn{border:0}
  .brand-text small{display:none}
  .bw{font-size:18px}
  .brandmark{width:36px;height:36px;font-size:22px;border-radius:11px}
  .global-search{width:40px;padding:0;justify-content:center;border-color:transparent;background:transparent}
  .global-search .gs-text,.global-search kbd{display:none}
  .global-search svg{width:21px;height:21px;color:var(--ink-2)}
  .crumbbar{padding:12px 16px 0}
  main{padding:16px 16px 96px}
  .site-footer{padding:32px 16px 100px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer-grid > div:first-child{grid-column:1/-1}
  .bottom-nav{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:45;background:color-mix(in srgb,var(--paper) 94%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--border);padding:6px 4px calc(6px + env(safe-area-inset-bottom))}
  .bottom-nav a{display:flex;flex-direction:column;align-items:center;gap:2px;font:500 11.5px var(--font-body);color:var(--muted);padding:4px 0;border-radius:10px}
  .bottom-nav a svg{width:22px;height:22px}
  .bottom-nav a.active{color:var(--brand);font-weight:600}
  .bottom-nav a.active svg{background:var(--brand-soft);border-radius:9px;padding:2px;width:34px;height:26px}
  .to-top{bottom:84px;right:14px;width:42px;height:42px}
  #toast{bottom:84px}
  .glance{grid-template-columns:1fr}
  .glance .objectives{border-right:0;border-bottom:1px solid var(--border)}
  .terms,.focus-grid,.grid-2,.grid-3{grid-template-columns:1fr}
  .subject-hero{grid-template-columns:auto 1fr;padding:20px}
  .subject-hero .ring{display:none}
  .exam-head{grid-template-columns:1fr}
  .era-head{padding-left:0}
  .exam-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .subject-card.wide{grid-template-columns:1fr;gap:6px}
  .page-heading{padding-bottom:16px}
}
@media (max-width:600px){
  body{font-size:15.5px}
  .subject-grid,.subject-grid.apt-grid,.stats-row,.metric-grid{grid-template-columns:1fr}
  .stats-row{grid-template-columns:1fr 1fr}
  .stat{padding:12px;gap:10px}
  .stat svg{width:30px;height:30px;padding:6px}
  .stat strong{font-size:19px}
  .page-heading{margin-bottom:18px}
  .date-stamp{display:none}
  .section-title{margin:42px 0 16px;flex-wrap:wrap;align-items:flex-start}
  .lesson-grid{grid-template-columns:1fr}
  .mistake{grid-template-columns:1fr}
  .timeline li{grid-template-columns:78px 1fr;gap:12px}
  .timeline li::before{left:86px}
  .timeline li::after{left:91px}
  .timeline .ev{padding-left:14px}
  .big-timeline li{grid-template-columns:82px 1fr;gap:20px}
  .big-timeline li::before{left:89px}
  .big-timeline li::after{left:95px}
  .block{padding:18px 16px}
  .pager{grid-template-columns:1fr}
  .pager .next{grid-column:1}
  .kv{grid-template-columns:1fr 1fr}
  #quiz-content,#search-dialog{padding:18px 16px}
  .lesson-row{grid-template-columns:30px 1fr;padding:12px 14px}
  .lesson-row > :last-child{display:none}
  th,td{padding:9px 10px;font-size:14px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-note{flex-direction:column}
  .flashcard{padding:28px 20px;min-height:260px}
  .toolbar{padding:8px}
  .toolbar select{flex:1}
  /* home */
  .hero{padding:26px 18px 0;border-radius:22px}
  .hero-kicker{font-size:12.5px;margin-bottom:16px}
  .brand-title .bt-hi{font-size:54px}
  .brand-title .bt-en{font-size:11.5px;letter-spacing:.24em;gap:10px}
  .brand-title .bt-en::before{width:26px}
  .hero-lede{font-size:16px}
  .hero-roots{gap:6px}
  .hero-roots div{padding:9px 10px 10px;border-radius:12px}
  .hero-roots dt{font-size:17px}
  .hero-roots dd{font-size:12px}
  .hero-search{min-height:52px;font-size:15px;padding:0 14px}
  .hero-search kbd{display:none}
  .hero-quick > span{display:none}
  .hero-side .today-card.dq{padding:18px 16px 14px}
  .hero-figures{margin:28px -18px 0;grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero-figures div,.hero-figures div:first-child{padding:12px 18px 14px}
  .hero-figures div:nth-child(-n+3){border-top:1px solid rgba(255,255,255,.08)}
  .hero-figures div:nth-child(-n+2){border-top:0}
  .hero-figures div:nth-child(5){grid-column:1/-1}
  .hero-figures dd.fig-num{font-size:24px}
  .exam-strip{grid-template-columns:1fr 1fr;gap:10px}
  .exam-chip{padding:14px 14px 12px}
  .exam-chip strong{font-size:16px}
  .exam-chip:last-child{grid-column:1/-1}
  .ex-full{font-size:12.5px}
  .today-grid{grid-template-columns:1fr}
  .today-card{padding:18px}
  .tool-grid{grid-template-columns:1fr 1fr;gap:10px}
  .tool{grid-template-columns:1fr;padding:14px}
  .tool-ic{grid-row:auto;width:40px;height:40px;margin-bottom:6px}
  .tool-n{grid-column:1}
  .tool-b small{font-size:12.5px}
  .method{grid-template-columns:1fr}
  .data-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .dcard{padding:14px 12px 12px}
  .dc-head h3{font-size:14.5px}
  .dc-head span{font-size:12px}
  .dc-num{font-size:26px;margin-top:8px}
  .dc-num small{font-size:14px}
  .dc-delta{font-size:12px}
  .dc-delta em{display:block}
  .dc-src{font-size:11.5px;gap:2px 10px}
  .cm-callout.feature{grid-template-columns:1fr;padding:18px}
  .subject-card.wide .card-art{grid-row:auto;border-right:0;border-bottom:1px solid var(--border);min-height:0;height:150px}
  .subject-card.wide .wide-side{grid-column:auto}
}
@media (max-width:380px){
  .bw{font-size:16.5px}
  .tool-grid,.exam-strip{grid-template-columns:1fr}
  .exam-chip:last-child{grid-column:auto}
}

/* ---------- Print ---------- */
@media print{
  .sidebar,.topbar,.crumbbar,.toc,.mobile-toc,.reader-controls,.bottom-nav,.site-footer,#notes,.pager,.read-progress,.to-top,.no-print{display:none!important}
  main{padding:0;max-width:none}
  body{background:#fff;color:#000;font-size:12pt}
  .block,.panel,.question-block,.term{break-inside:avoid;box-shadow:none}
  .reader-layout{display:block}
  a{color:#000}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
body.embedded #print-lesson,body.embedded #print-rev,body.embedded #export-progress{display:none}
.stat strong,.metric strong,.kv b,.quiz-result,.lesson-row .idx{font-variant-numeric:tabular-nums}
dialog:focus,dialog:focus-visible{outline:none}

/* ===== v6.1 — एडमिन से नियंत्रित खंड ===== */
#footer-pages a{display:block;font-size:14.5px;color:var(--ink-2);margin:6px 0}
#footer-pages a:hover{color:var(--brand)}
.footer-social{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.footer-social[hidden]{display:none}
.footer-grid .footer-social a{margin:0;display:grid;place-items:center;width:38px;height:38px;border-radius:11px;border:1px solid var(--border);background:var(--paper-2);color:var(--ink-2);transition:all .15s}
.footer-grid .footer-social a:hover{background:var(--brand);border-color:var(--brand);color:var(--on-brand)}
.footer-social svg{width:19px;height:19px}
.hero.no-side .hero-grid{grid-template-columns:minmax(0,1fr)}
.hero.no-side .hero-copy{max-width:820px}
.hero-pad{height:44px}
.custom-block{margin-top:56px;padding:28px 30px;border-radius:calc(var(--radius) + 4px);background:var(--paper);border:1px solid var(--border)}
.custom-block.tint{background:linear-gradient(110deg,var(--brand-soft),var(--paper) 80%);border-color:color-mix(in srgb,var(--brand) 22%,var(--border))}
.custom-block.dark{color:#fff;border:0;background:linear-gradient(150deg,color-mix(in srgb,var(--c-hero) 82%,var(--c-brand)),var(--c-hero))}
.custom-block.dark .eyebrow{color:var(--c-hl)}
.custom-block.dark .cb-text,.custom-block.dark .cb-text p{color:rgba(255,255,255,.8)}
.custom-block.dark .btn.outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.custom-block h2{font-size:clamp(22px,2.4vw,28px);margin:4px 0 8px}
.cb-text{color:var(--ink-2);max-width:860px}
.cb-text p:last-child{margin-bottom:0}
.cb-text a,.page-body a{color:var(--brand);font-weight:600;text-decoration:underline;text-underline-offset:3px}
.custom-block.dark .cb-text a{color:var(--c-hl)}
.page-body{max-width:900px;font-size:16.5px}
.page-body h3{margin-top:22px}
@media (max-width:600px){.custom-block{padding:20px 18px;margin-top:42px}}

/* ===== v6.2 — लाइब्रेरी: विषय चुनें → भाग → अध्याय ===== */
.lib-search{position:relative;max-width:760px}
.lib-search svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);width:20px;height:20px;color:var(--muted);pointer-events:none}
.lib-search .input{width:100%;height:54px;padding-left:46px;font-size:16.5px;border-radius:14px;box-shadow:var(--shadow-sm)}
.lib-group{margin-top:34px}
.lib-group > h2{font-size:21px;margin-bottom:14px;display:flex;align-items:baseline;gap:10px}
.lib-group > h2 span{font:600 13px var(--font-ui);color:var(--muted)}
.subj-tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:14px}
.subj-tile{position:relative;display:flex;gap:14px;align-items:flex-start;padding:18px 18px 16px;background:var(--paper);border:1px solid var(--border);border-left:4px solid var(--color);border-radius:var(--radius);transition:border-color .15s,box-shadow .15s,transform .15s}
.subj-tile:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:color-mix(in srgb,var(--color) 45%,var(--border));border-left-color:var(--color)}
.st-ic{display:grid;place-items:center;flex:none;width:48px;height:48px;border-radius:13px;background:var(--tint);color:var(--color)}
.st-ic svg{width:26px;height:26px}
.st-b{flex:1;min-width:0;display:flex;flex-direction:column}
.st-b strong{font:700 19px/1.3 var(--font-head);color:var(--ink)}
.st-b small{font:700 10.5px var(--font-ui);letter-spacing:.1em;color:var(--muted);margin-top:2px}
.st-parts{display:flex;flex-wrap:wrap;gap:5px;margin:10px 0 10px}
.st-parts i{font-style:normal;font-size:12.5px;padding:2px 9px;border-radius:999px;background:var(--paper-2);border:1px solid var(--border);color:var(--ink-2);white-space:nowrap;max-width:100%;overflow:hidden;text-overflow:ellipsis}
.st-meta{font-size:13.5px;color:var(--muted)}
.st-meta b{font-family:var(--font-ui);color:var(--ink)}
.subj-tile .mini-track{margin-top:8px}
.st-go{position:absolute;right:16px;top:18px;font:700 16px var(--font-ui);color:var(--color);opacity:.55;transition:transform .15s,opacity .15s}
.subj-tile:hover .st-go{opacity:1;transform:translateX(3px)}
.spec-tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.spec-tile{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;align-items:center;padding:14px 16px;background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);transition:border-color .15s,box-shadow .15s}
.spec-tile:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.spec-tile .tool-ic{grid-row:1/3;width:42px;height:42px}
.spec-tile strong{display:block;font-weight:600;font-size:15.5px;line-height:1.3}
.spec-tile small{display:block;font-size:12.5px;color:var(--muted);line-height:1.4}
.spec-tile b{grid-column:2;font:600 12px var(--font-ui);color:var(--accent)}
.part-jump{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 18px}
.part-jump > span{font-size:14px;color:var(--muted);margin-right:2px}
.part-jump .chip:hover{border-color:var(--color);color:var(--color)}
.part-block{margin-top:22px;scroll-margin-top:calc(var(--header) + 16px)}
.part-block > header{display:flex;align-items:center;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.part-block .pn{font:700 12px var(--font-ui);color:#fff;background:var(--color);border-radius:8px;padding:4px 10px;letter-spacing:.02em}
.part-block h2{font-size:20px;flex:1;min-width:0}
@media (max-width:600px){
  .subj-tiles,.spec-tiles{grid-template-columns:1fr}
  .lib-search .input{height:50px;font-size:15px}
  .part-jump > span{width:100%}
}