:root{--gold:#f1c877;--bg:#0c0d11;--panel:#17191e;--line:#66522f;--muted:#c5c0b7}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:#f9f7f1;font:16px/1.65 system-ui,-apple-system,Segoe UI,Arial,sans-serif}a{color:var(--gold)}button,input{font:inherit}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid white;outline-offset:3px}.topbar{position:sticky;top:0;z-index:8;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;background:#101116f5;border-bottom:1px solid var(--line);padding:10px max(20px,calc((100vw - 1150px)/2))}.brand{display:flex;align-items:center;gap:12px;color:var(--gold);text-decoration:none;font-weight:850;line-height:1.25;letter-spacing:.03em}.brand img{width:55px;height:55px;object-fit:contain}.brand small{display:block;color:#eee;font-size:10px;letter-spacing:.15em;font-weight:500}.topbar nav{display:flex;flex-wrap:wrap;gap:15px}.topbar nav a{text-decoration:none;color:#eee;font-size:14px}.topbar nav a:hover{color:var(--gold)}.intro{min-height:510px;position:relative;isolation:isolate;display:flex;align-items:center;overflow:hidden;border-bottom:1px solid var(--line)}.cinema{position:absolute;inset:0;z-index:-1}.cinema div{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;animation:scene 24s infinite;transform:scale(1.08)}.cinema div:nth-child(1){background-image:url('campus-pupils.webp')}.cinema div:nth-child(2){background-image:url('campus-teachers.webp');animation-delay:8s}.cinema div:nth-child(3){background-image:url('campus-science.webp');animation-delay:16s}.cinema:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#07080bed 5%,#07080bcb 54%,#07080b72),linear-gradient(0deg,#07080bc4,transparent 75%)}@keyframes scene{0%{opacity:0;transform:scale(1.08)}6%,29%{opacity:1}35%,100%{opacity:0;transform:scale(1.19)}}.intro-inner{width:min(1150px,100%);margin:auto;padding:75px 25px}.kicker{font-size:12px;letter-spacing:.16em;color:var(--gold);font-weight:800;text-transform:uppercase}h1{font-size:clamp(43px,7vw,83px);line-height:1.1;letter-spacing:-.045em;margin:14px 0}em{color:var(--gold);font-style:normal}.intro p:not(.kicker){font-size:19px;max-width:650px;color:#f0eae0}.action{display:inline-block;border:1px solid var(--gold);background:var(--gold);color:#15110a;border-radius:8px;padding:11px 19px;text-decoration:none;font-weight:800;margin:8px 9px 0 0}.action.outline{background:#141416a6;color:var(--gold)}.action:hover{filter:brightness(1.13)}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;width:min(1150px,calc(100% - 40px));margin:24px auto 0}.stats div{border:1px solid var(--line);background:var(--panel);border-radius:13px;padding:16px;text-align:center}.stats strong{display:block;color:var(--gold);font-size:25px}.stats span{font-size:13px;color:var(--muted)}.section{width:min(1150px,calc(100% - 40px));margin:0 auto;padding:55px 0;scroll-margin-top:95px;border-bottom:1px solid #393228}h2{font-size:clamp(29px,4vw,44px);line-height:1.2;margin:8px 0 14px}.muted{color:var(--muted)}.toolbar{display:flex;flex-wrap:wrap;gap:15px;align-items:end;margin:25px 0}.search-label{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}input[type=search]{background:#18191f;color:white;border:1px solid #77603a;border-radius:8px;padding:12px 15px;min-width:min(100%,310px);flex:1}.filters{display:flex;flex-wrap:wrap;gap:8px}.filter{border:1px solid var(--line);background:#222127;color:#eee;padding:9px 14px;border-radius:24px}.filter.active{background:var(--gold);color:#17120b;font-weight:800}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.guide-card,.daily-card,.lesson-content,.quiz,.badges article{background:var(--panel);border:1px solid #54452e;border-radius:14px;padding:22px}.guide-card h3{font-size:22px;margin:7px 0}.guide-card p{color:var(--muted)}.guide-card .pill{font-size:12px;color:var(--gold);text-transform:uppercase;letter-spacing:.09em}.guide-card button{border:1px solid var(--gold);background:transparent;color:var(--gold);border-radius:7px;padding:9px 13px;font-weight:750}.guide-card .done{color:#9ee0b5}.lesson-area{background:linear-gradient(#19191e,#101116);padding:30px;border:1px solid var(--line);border-radius:14px;margin-top:30px}.text-button{background:none;border:0;color:var(--gold);padding:8px 0;text-decoration:underline}.lesson-content h3{color:var(--gold)}.lesson-content li{margin:9px 0}.lesson-controls{margin:20px 0}.quiz h3{color:var(--gold)}fieldset{border:1px solid #484037;border-radius:10px;margin:16px 0;padding:16px}legend{font-weight:700;padding:0 8px}fieldset label{display:block;padding:6px;cursor:pointer}fieldset input{accent-color:var(--gold);margin-right:8px}.correct{color:#a2edbc}.incorrect{color:#ffb4ac}.daily-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.daily-options button{border:1px solid #78613b;border-radius:8px;background:#29252a;color:#fff;padding:12px;text-align:left}.daily-options button:disabled{cursor:default;opacity:.8}.badges,.departments{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.badges article{opacity:.56}.badges article.earned{opacity:1;border-color:#c7a05b}.badges article strong{display:block;color:var(--gold);font-size:18px}.departments a{display:flex;flex-direction:column;gap:6px;background:var(--panel);border:1px solid #5c4a2d;border-radius:12px;padding:19px;text-decoration:none}.departments b{color:var(--gold)}.departments span{color:var(--muted);font-size:14px}.payment-note{margin-top:25px;padding:15px 19px;border-left:4px solid var(--gold);background:#282217;color:#e9dcc3;border-radius:5px}footer{text-align:center;color:#c5c0b7;padding:30px 15px}@media(max-width:850px){.cards,.badges,.departments{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.topbar{padding:9px 16px}.topbar nav{gap:10px}.topbar nav a{font-size:12px}.stats{grid-template-columns:repeat(2,1fr)}.cards,.badges,.departments,.daily-options{grid-template-columns:1fr}.intro{min-height:460px}.intro-inner{padding:55px 20px}.lesson-area{padding:18px}.section{padding:40px 0}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.cinema div{animation:none;transform:none;opacity:0}.cinema div:first-child{opacity:1}}

/* V23 subject and grade selectors */
.grade-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin:0 0 24px}.grade-row label{display:flex;align-items:center;gap:8px;color:var(--gold);font-weight:750}.grade-row select{background:#18191f;color:white;border:1px solid #77603a;border-radius:8px;padding:10px;max-width:190px}.grade-row #resultCount{margin-left:auto;color:var(--muted);font-size:14px}select:focus-visible{outline:3px solid white;outline-offset:3px}

/* V24 chapter indicators and print view */
.comprehensive-tag{font-weight:750;color:#f1c877!important;font-size:13px}.lesson-content p{white-space:pre-line}.lesson-content h3{margin-top:24px}.lesson-controls a[hidden]{display:none!important}

/* V25: accessible textbook figures and clear document controls */
.lesson-figure{margin:4px 0 25px;padding:13px;border:1px solid #a8894d;border-radius:12px;background:#faf7f1;text-align:center}.lesson-figure img{width:100%;height:auto;max-height:280px;object-fit:contain}.lesson-figure figcaption{font-size:12px;color:#5d4e32;margin-top:7px}.lesson-controls{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.lesson-controls .action{margin:0}.guide-card{transition:transform .18s,border-color .18s}.guide-card:hover{transform:translateY(-4px);border-color:#d9b36c}.guide-card button{cursor:pointer}