/* ServKart Edu */
:root{
  --primary:#0e7490; --primary-dark:#155e75; --accent:#f59e0b;
  --bg:#f8fafc; --card:#ffffff; --ink:#0f172a; --muted:#64748b;
  --line:#e2e8f0; --green:#16a34a; --red:#dc2626;
  --radius:14px; --shadow:0 1px 3px rgba(15,23,42,.08),0 4px 14px rgba(15,23,42,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%}
button{font-family:inherit}

/* topbar */
.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:28px;padding:0 28px;height:64px;background:#fff;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-size:1.15rem;letter-spacing:-.02em}
.brand b{color:var(--primary)}
.brand-badge{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#0e7490,#0891b2);font-size:1.1rem}
.topnav{display:flex;gap:22px;font-weight:500;color:#334155}
.topnav a:hover{color:var(--primary)}
.topbar{transition:box-shadow .25s ease}
.topbar.scrolled{box-shadow:0 2px 18px rgba(15,23,42,.09)}
.topnav{gap:4px}
.topnav a{display:flex;align-items:center;gap:7px;padding:10px 10px;position:relative;font-size:.92rem;border-radius:8px;transition:color .18s ease,background .18s ease}
.topnav a svg{opacity:.7;transition:opacity .2s ease,transform .2s ease}
.topnav a::after{content:"";position:absolute;left:10px;right:10px;bottom:3px;height:2.5px;border-radius:2px;background:linear-gradient(90deg,var(--primary),#0891b2);transform:scaleX(0);transform-origin:left;transition:transform .28s cubic-bezier(.22,.9,.32,1)}
.topnav a:hover{background:#f1f7f8}
.topnav a:hover svg{opacity:1;transform:translateY(-1px)}
.topnav a:hover::after{transform:scaleX(1)}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.hamburger{display:none;margin-left:auto;background:none;border:none;font-size:1.5rem;cursor:pointer}
.mobile-menu{display:none;flex-direction:column;gap:14px;padding:18px 28px;background:#fff;border-bottom:1px solid var(--line)}
.mobile-menu.open{display:flex}
.avatar{width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:700;cursor:pointer}
.nav-dropdown{position:relative}
.nav-menu{position:absolute;right:0;top:46px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);min-width:200px;padding:8px;display:none}
.nav-menu.open{display:block}
.nav-menu a,.nav-menu button{display:block;width:100%;text-align:left;padding:9px 12px;border-radius:8px;border:none;background:none;font-size:.92rem;cursor:pointer}
.nav-menu a:hover,.nav-menu button:hover{background:var(--bg)}
.nav-menu .role-tag{padding:4px 12px;font-size:.75rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:10px;border:1px solid transparent;font-weight:600;font-size:.95rem;cursor:pointer;transition:.15s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-outline{border-color:var(--line);background:#fff;color:var(--ink)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-ghost{background:none;color:#334155}
.btn-ghost:hover{color:var(--primary)}
.btn-lg{padding:14px 28px;font-size:1.05rem}
.btn-sm{padding:6px 13px;font-size:.85rem;border-radius:8px}
.btn-green{background:var(--green);color:#fff}
.btn-danger{background:#fef2f2;color:var(--red);border-color:#fecaca}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-block{width:100%}

/* layout */
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:56px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:26px;gap:12px;flex-wrap:wrap}
.section-head h2{font-size:1.7rem;letter-spacing:-.02em}
.section-head p{color:var(--muted)}

/* hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#f0fdfa 0%,#eef6fb 55%,#f8fafc 100%);color:var(--ink);padding:60px 0 58px}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;z-index:0;pointer-events:none}
.hero::before{width:440px;height:440px;background:#a7f3d0;top:-180px;right:-110px}
.hero::after{width:380px;height:380px;background:#bae6fd;bottom:-200px;left:-90px}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid #d7f3ee;color:#0e7490;font-weight:700;font-size:.8rem;padding:7px 14px;border-radius:99px;margin-bottom:18px;box-shadow:0 1px 3px rgba(15,23,42,.05)}
.hero h1{font-size:2.65rem;line-height:1.17;letter-spacing:-.03em;margin-bottom:16px;color:#0f172a}
.hero h1 span{color:#0e7490}
.hero p.lead{font-size:1.12rem;color:#45536a;margin-bottom:24px;max-width:560px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero .btn-outline{background:#fff;border-color:#d7dee8;color:var(--ink)}
.hero .btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.hero-stats{display:flex;gap:10px;margin-top:28px;flex-wrap:wrap}
.hero-stats .stat-pill{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid #e6eaef;border-radius:12px;padding:9px 15px;box-shadow:0 1px 3px rgba(15,23,42,.04)}
.hero-stats .stat-pill b{font-size:1.02rem;color:#0f172a}
.hero-stats .stat-pill span{color:#64748b;font-size:.78rem}
.hero-card{background:#fff;border:1px solid #e6eaef;border-radius:22px;padding:26px;box-shadow:0 18px 44px rgba(15,23,42,.08)}
.hero-card h3{margin-bottom:4px;font-size:1.08rem;color:#0f172a}
.hero-card .sub{color:#64748b;font-size:.84rem;margin-bottom:16px;display:block}
.hero-card .track{display:flex;align-items:center;gap:12px;padding:12px;border-radius:13px;background:#f8fafc;margin-bottom:9px;font-size:.9rem;font-weight:600;color:#334155;border:1px solid #eef2f6;transition:transform .18s ease,box-shadow .18s ease}
.hero-card .track:hover{transform:translateX(3px);box-shadow:0 4px 12px rgba(15,23,42,.06)}
.hero-card .track .ic{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;color:#fff;flex:none}
.hero-card .track .ic svg{width:18px;height:18px}
.hero-card .track small{display:block;font-weight:500;color:#8592a8;font-size:.76rem;margin-top:1px}

/* category chips */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(202px,1fr));gap:16px}
.cat-card{position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;cursor:pointer;transition:transform .25s cubic-bezier(.22,.9,.32,1),box-shadow .25s ease,border-color .25s ease;box-shadow:0 1px 3px rgba(15,23,42,.05)}
.cat-card::before{content:"";position:absolute;top:-40%;left:-60%;width:60%;height:220%;background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.6) 50%,transparent 70%);transform:rotate(8deg);transition:left .6s ease;pointer-events:none}
.cat-card:hover{transform:translateY(-6px);box-shadow:0 20px 36px var(--cat-shadow,rgba(15,23,42,.14));border-color:transparent}
.cat-card:hover::before{left:130%}
.cat-card .ic-badge{display:inline-grid;place-items:center;width:52px;height:52px;border-radius:15px;margin-bottom:14px;background:linear-gradient(135deg,var(--cat-a1,#0e7490),var(--cat-a2,#0891b2));box-shadow:0 8px 18px var(--cat-shadow,rgba(14,116,144,.28));transition:transform .3s ease}
.cat-card:hover .ic-badge{transform:scale(1.08) rotate(-4deg)}
.cat-card .ic-badge svg{width:24px;height:24px}
.cat-card h3{font-size:1.01rem;font-weight:700;letter-spacing:-.005em;position:relative;z-index:1}
.cat-card p{color:var(--muted);font-size:.82rem;margin-top:4px;position:relative;z-index:1}
.cat-card .cat-arrow{position:absolute;right:18px;bottom:20px;opacity:0;transform:translateX(-6px);transition:opacity .2s ease,transform .2s ease;color:var(--cat-a2,#0e7490)}
.cat-card:hover .cat-arrow{opacity:1;transform:translateX(0)}
.cat-card.soon{opacity:.55;cursor:default}
.cat-card.soon:hover{transform:none;box-shadow:0 1px 3px rgba(15,23,42,.05);border-color:var(--line)}
.cat-card.soon:hover::before{left:-60%}
.cat-card .soon-tag{position:absolute;top:14px;right:14px;background:var(--bg);color:var(--muted);font-size:.66rem;font-weight:700;padding:3px 9px;border-radius:99px;text-transform:uppercase;letter-spacing:.03em;z-index:1}

/* course cards */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(272px,1fr));gap:22px}
.course-card{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 1px 3px rgba(15,23,42,.05);cursor:pointer;transition:transform .2s cubic-bezier(.22,.9,.32,1),box-shadow .2s ease,border-color .2s ease;display:flex;flex-direction:column}
.course-card:hover{transform:translateY(-5px);box-shadow:0 18px 34px rgba(15,23,42,.13);border-color:#dde3ea}
.course-thumb{height:150px;position:relative;overflow:hidden;color:#fff}
.course-thumb::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.16) 1.6px,transparent 1.6px);background-size:16px 16px;background-position:-4px -4px;-webkit-mask-image:linear-gradient(115deg,#000 15%,transparent 60%);mask-image:linear-gradient(115deg,#000 15%,transparent 60%)}
.course-thumb .motif{position:absolute;right:-26px;bottom:-28px;width:150px;height:150px;opacity:.17;transform:rotate(-6deg)}
.course-thumb .motif svg{width:100%;height:100%}
.course-thumb .badge-ic{position:absolute;left:16px;bottom:14px;width:38px;height:38px;border-radius:11px;background:rgba(255,255,255,.22);backdrop-filter:blur(2px);display:grid;place-items:center}
.course-thumb .badge-ic svg{width:20px;height:20px}
.course-thumb .lvl{position:absolute;top:12px;left:12px;background:rgba(255,255,255,.22);color:#fff;font-size:.7rem;font-weight:700;padding:4px 10px;border-radius:99px}
.course-thumb .price-tag{position:absolute;top:12px;right:12px;background:#fff;color:var(--ink);font-size:.76rem;font-weight:800;padding:4px 11px;border-radius:99px}
.course-thumb .price-tag.free{background:#16a34a;color:#fff}
.course-thumb .price-tag.soon{background:#fef3c7;color:#92400e}
.course-thumb .best-tag{position:absolute;right:12px;bottom:12px;display:flex;align-items:center;gap:5px;background:#f59e0b;color:#78350f;font-size:.68rem;font-weight:800;padding:4px 10px;border-radius:99px}
.course-card.coming-soon{opacity:.82}
.course-card.coming-soon .course-thumb{filter:grayscale(.25)}
.course-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.course-body .provider{display:flex;align-items:center;gap:6px;font-size:.72rem;color:#8592a8;font-weight:600}
.course-body .provider .sk{width:16px;height:16px;border-radius:5px;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:.55rem;font-weight:800}
.course-body h3{font-size:1.02rem;line-height:1.35;font-weight:700}
.course-body .desc{color:var(--muted);font-size:.85rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.course-meta{display:flex;align-items:center;gap:13px;font-size:.78rem;color:#5b6b83;font-weight:600;margin-top:auto;padding-top:9px;border-top:1px solid #eef2f6}
.course-meta svg{width:13px;height:13px;vertical-align:-2px;margin-right:3px}
.course-meta .rating{color:#b45309}
.course-meta .soon-note{color:#92400e;font-weight:600}

/* filters */
.filter-bar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:24px}
.filter-bar select,.filter-bar input[type=search]{padding:10px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:.92rem;font-family:inherit}
.filter-bar input[type=search]{flex:1;min-width:220px}
.chip-row{display:flex;gap:8px;flex-wrap:wrap}
.chip{padding:7px 15px;border-radius:99px;border:1px solid var(--line);background:#fff;font-size:.85rem;font-weight:500;cursor:pointer}
.chip.active{background:var(--primary);border-color:var(--primary);color:#fff}

/* course detail */
.detail-hero{background:linear-gradient(135deg,#0f172a,#1e3a5f);color:#fff;padding:52px 0}
.detail-grid{display:grid;grid-template-columns:1fr 350px;gap:40px;align-items:start}
.detail-hero .cat{color:#7dd3fc;font-weight:600;font-size:.85rem;text-transform:uppercase;letter-spacing:.05em}
.detail-hero h1{font-size:2.1rem;letter-spacing:-.02em;margin:10px 0 14px}
.detail-hero p.lead{color:#cbd5e1;font-size:1.05rem}
.detail-hero .facts{display:flex;gap:20px;margin-top:18px;flex-wrap:wrap;font-size:.9rem;color:#94a3b8}
.buy-card{background:#fff;color:var(--ink);border-radius:16px;box-shadow:0 18px 44px rgba(0,0,0,.28);padding:24px;position:sticky;top:84px}
.buy-card .thumb{height:120px;border-radius:12px;display:grid;place-items:center;font-size:3rem;color:#fff;margin-bottom:16px}
.buy-card .price{font-size:1.9rem;font-weight:800;margin-bottom:2px}
.buy-card .price small{font-size:1rem;color:var(--muted);font-weight:500}
.buy-card ul{list-style:none;margin:14px 0;font-size:.88rem;color:#334155}
.buy-card li{padding:5px 0;display:flex;gap:8px}
.detail-body{padding:44px 0}
.detail-cols{display:grid;grid-template-columns:1fr 350px;gap:40px}
.content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin-bottom:22px}
.content-card h2{font-size:1.25rem;margin-bottom:14px}
.outcome-list{display:grid;grid-template-columns:1fr 1fr;gap:10px;list-style:none}
.outcome-list li{display:flex;gap:9px;font-size:.92rem}
.outcome-list li::before{content:"✓";color:var(--green);font-weight:700}
.curriculum{border-top:1px solid #edf1f5}
.curriculum .mod{border-bottom:1px solid #edf1f5}
.curriculum .mod-head{display:flex;align-items:center;gap:14px;padding:16px 4px;cursor:pointer;font-weight:700;font-size:.95rem;transition:background .15s ease}
.curriculum .mod-head:hover{background:#f8fafc}
.curriculum .mod-head .mod-num{width:30px;height:30px;border-radius:9px;background:#eef2f6;color:#45536a;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:800;flex:none;transition:background .2s ease,color .2s ease}
.curriculum .mod.open .mod-head .mod-num{background:var(--primary);color:#fff}
.curriculum .mod-head .title{flex:1}
.curriculum .mod-head .count{color:#8592a8;font-weight:600;font-size:.78rem}
.curriculum .mod-head .chev{transition:transform .2s ease;color:#8592a8;flex:none}
.curriculum .mod.open .mod-head .chev{transform:rotate(180deg)}
.curriculum .mod-lessons{display:none;padding:2px 4px 14px 44px;flex-direction:column;gap:2px}
.curriculum .mod.open .mod-lessons{display:flex}
.curriculum .les{display:flex;align-items:center;gap:10px;padding:9px 0;font-size:.87rem;color:#334155}
.curriculum .les svg{flex:none;color:var(--primary)}
.curriculum .les .les-title{flex:1}
.curriculum .les .tag{font-size:.7rem;background:#e0f2fe;color:#0369a1;padding:2px 8px;border-radius:99px;font-weight:600}
.curriculum .les .dur{color:#8592a8;font-size:.76rem}
.mod-preview-btn{
  display:flex;align-items:center;gap:9px;width:100%;text-align:left;border:none;cursor:pointer;
  padding:11px 18px;font-size:.86rem;font-weight:700;color:#0d4a2e;
  background:linear-gradient(90deg,#e8f5ee,#fbf1d9);border-top:1px solid var(--line)
}
.mod-preview-btn:hover{filter:brightness(.97)}
.mod-preview-play{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:#146c43;color:#fff;font-size:.62rem}
.mod-preview-time{color:#8a6a12;font-weight:600}

/* player -- full-page slide layout: sidebar + main both occupy exactly the
   viewport below the topbar, no outer page scroll. The active slide (whatever
   it is -- content, module intro, quiz) stretches to fill all leftover
   vertical space, and the next/previous nav stays pinned at the bottom,
   always visible without scrolling. */
.player{display:grid;grid-template-columns:320px 1fr;height:calc(100vh - 64px);overflow:hidden}
.player-side{background:#fff;border-right:1px solid var(--line);overflow-y:auto;height:100%}
.player-side .side-head{padding:18px;border-bottom:1px solid var(--line)}
.player-side .side-head h3{font-size:.98rem;line-height:1.35}
.progress-bar{height:8px;background:var(--line);border-radius:99px;margin-top:10px;overflow:hidden}
.progress-bar i{display:block;height:100%;background:var(--green);border-radius:99px;transition:.3s}
.progress-label{font-size:.78rem;color:var(--muted);margin-top:5px}
.side-mod-head{padding:12px 18px;background:var(--bg);font-weight:600;font-size:.86rem;border-bottom:1px solid var(--line);cursor:pointer;display:flex;justify-content:space-between}
.side-les{display:flex;gap:10px;align-items:center;padding:10px 18px;font-size:.86rem;cursor:pointer;border-bottom:1px solid #f1f5f9;color:#334155}
.side-les:hover{background:var(--bg)}
.side-les.active{background:#e0f2fe;color:#075985;font-weight:600}
.side-les .check{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);flex:none;display:grid;place-items:center;font-size:.65rem}
.side-les .check.done{background:var(--green);border-color:var(--green);color:#fff}
.side-les.quiz-link{color:#7c2d12;font-weight:600}
.player-main{
  --gold:#c9971e; --gold-dark:#8a6a12; --gold-pale:#fbf1d9;
  --sgreen:#146c43; --sgreen-dark:#0d4a2e; --sgreen-pale:#e8f5ee;
  padding:34px 52px 40px;position:relative;
  height:100%;overflow-y:auto;overflow-x:hidden;display:flex;flex-direction:column
}
.player-main .lesson-head{flex:0 0 auto;margin-bottom:22px;padding-bottom:18px;border-bottom:2px solid var(--gold-pale)}
/* whichever slide body is present (content card, module intro, quiz, quiz
   result) grows to fill the space between the head and the nav bar */
.player-main>.slide-card,.player-main>.module-intro-hero,.player-main>.quiz-q,.player-main>.quiz-score{
  flex:0 0 auto;min-height:460px;
  display:flex;flex-direction:column;justify-content:center
}
.player-main .lesson-nav{flex:0 0 auto}
.player-main .lesson-head .crumb{display:inline-flex;align-items:center;gap:6px;font-size:.78rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--sgreen-dark);background:var(--sgreen-pale);padding:5px 13px;border-radius:99px}
.player-main .lesson-head h1{
  font-size:2.65rem;letter-spacing:-.02em;margin-top:14px;font-weight:800;
  background:linear-gradient(100deg,#1c1305 30%,var(--sgreen-dark) 75%,var(--gold-dark));
  -webkit-background-clip:text;background-clip:text;color:transparent
}
.lesson-content{font-size:1.6rem;line-height:1.75;color:#1e293b;max-width:900px;margin:0 auto;width:100%}
.lesson-content>*{animation:contentReveal .5s cubic-bezier(.22,.9,.32,1) both}
.lesson-content>*:nth-child(1){animation-delay:.02s}
.lesson-content>*:nth-child(2){animation-delay:.08s}
.lesson-content>*:nth-child(3){animation-delay:.14s}
.lesson-content>*:nth-child(4){animation-delay:.20s}
.lesson-content>*:nth-child(5){animation-delay:.26s}
.lesson-content>*:nth-child(6){animation-delay:.32s}
.lesson-content>*:nth-child(n+7){animation-delay:.38s}
@keyframes contentReveal{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
.lesson-content h2{
  font-size:2.15rem;margin:30px 0 16px;font-weight:800;color:var(--sgreen-dark);
  padding:11px 20px;border-left:5px solid var(--gold);
  background:linear-gradient(90deg,var(--sgreen-pale),transparent);border-radius:0 12px 12px 0
}
.lesson-content h3{font-size:1.65rem;margin:24px 0 10px;color:var(--sgreen-dark);font-weight:700;display:flex;align-items:center;gap:9px}
.lesson-content h3::before{content:"◆";color:var(--gold);font-size:.65em}
.lesson-content p{margin-bottom:16px}
.lesson-content ul,.lesson-content ol{margin:0 0 18px 4px;list-style:none}
.lesson-content li{margin-bottom:12px;padding-left:30px;position:relative;font-size:1.4rem}
.lesson-content ul li::before{content:"";position:absolute;left:4px;top:11px;width:9px;height:9px;border-radius:50%;background:linear-gradient(135deg,var(--gold),var(--sgreen))}
.lesson-content ol{counter-reset:ol-count}
.lesson-content ol li{counter-increment:ol-count}
.lesson-content ol li::before{content:counter(ol-count);left:0;top:0;width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--sgreen),var(--sgreen-dark));color:#fff;font-size:.72rem;font-weight:700;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 6px rgba(20,108,67,.3)}
.lesson-content hr{border:none;border-top:1px dashed #e5d7ad;margin:26px 0}
.lesson-content blockquote{border-left:4px solid var(--gold);background:linear-gradient(90deg,var(--sgreen-pale),var(--gold-pale) 140%);color:var(--sgreen-dark);padding:16px 20px;border-radius:0 14px 14px 0;margin:18px 0;font-style:italic;font-size:1.08rem}
.lesson-content blockquote p{margin-bottom:0}
.lesson-content em{color:var(--muted)}
.lesson-content code{background:var(--gold-pale);color:#7a5b0d;padding:2px 7px;border-radius:6px;font-size:.9em}
.video-slot{background:linear-gradient(135deg,#0d2b1e,#0f172a);color:#cbd5c8;border-radius:14px;padding:40px;text-align:center;margin-bottom:24px;border-top:3px solid var(--gold)}
.video-slot .ic{font-size:2.4rem;display:block;margin-bottom:8px}
/* module intro video slide */
.module-intro-hero{margin-bottom:0;max-width:900px;margin-left:auto;margin-right:auto;width:100%}
.module-intro-frame{
  position:relative;border-radius:20px;overflow:hidden;padding:10px;
  background:linear-gradient(135deg,#0d2b1e,#0f172a 55%,#1c1305);
  box-shadow:0 10px 34px rgba(13,43,30,.35)
}
.module-intro-frame video{width:100%;display:block;border-radius:13px;background:#000}
.module-intro-blurb{margin-top:16px;font-size:1.05rem;color:var(--muted);text-align:center}
.side-les.module-intro-link{color:#8a6a12;font-weight:600}
.side-les.module-intro-link .check{background:#fbf1d9}
.lesson-nav{display:flex;justify-content:space-between;gap:12px;margin-top:34px;padding-top:20px;border-top:1px solid var(--line)}
.lesson-nav .btn{padding:14px 26px;font-size:1.02rem;font-weight:700;border-radius:12px;transition:transform .15s ease,filter .15s ease,border-color .15s ease,color .15s ease}
.player-main .lesson-nav .btn-primary{background:linear-gradient(135deg,var(--sgreen),var(--sgreen-dark));box-shadow:0 4px 14px rgba(20,108,67,.3)}
.player-main .lesson-nav .btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.player-main .lesson-nav .btn-primary:disabled{background:#c9d6cf;box-shadow:none;transform:none}
.player-main .lesson-nav .btn-outline{border-width:2px;border-color:#e3d6a6;color:var(--sgreen-dark);background:#fffdf7}
.player-main .lesson-nav .btn-outline:hover{border-color:var(--gold);color:var(--gold-dark);transform:translateY(-1px)}
/* slideshow */
.slide-dots{display:flex;gap:10px;margin-top:16px}
.slide-dots .dot{width:13px;height:13px;border-radius:50%;background:#fff;border:3px solid #e9d9a8;transition:.15s}
.slide-dots .dot.seen{background:var(--sgreen);border-color:var(--sgreen)}
.slide-dots .dot.active{background:var(--gold);border-color:var(--gold);transform:scale(1.5);box-shadow:0 0 0 5px var(--gold-pale)}
.slide-card{
  min-height:460px;animation:slideIn .45s cubic-bezier(.22,.9,.32,1);position:relative;overflow:hidden;
  background:
    radial-gradient(ellipse 620px 320px at 100% 0%, var(--gold-pale) 0%, transparent 60%),
    radial-gradient(ellipse 560px 300px at 0% 100%, var(--sgreen-pale) 0%, transparent 62%),
    radial-gradient(rgba(20,108,67,.05) 1.4px, transparent 1.4px),
    #fffefb;
  background-size:auto,auto,22px 22px;
  border:1px solid #eee0bb;border-radius:26px;padding:60px 72px;
  box-shadow:0 4px 14px rgba(139,109,18,.10),0 26px 54px rgba(20,108,67,.12)
}
.slide-card::before{content:"";position:absolute;top:0;left:0;right:0;height:9px;background:linear-gradient(90deg,var(--gold),var(--sgreen) 55%,var(--gold))}
.slide-card::after{content:attr(data-icon);position:absolute;right:-18px;bottom:-32px;font-size:10rem;opacity:.08;line-height:1;pointer-events:none;transform:rotate(-8deg)}
@keyframes slideIn{from{opacity:0;transform:translateY(18px) scale(.985)}to{opacity:1;transform:translateY(0) scale(1)}}
/* per-module visual themes -- cycled by module position (theme 0 is the
   original gold/green look) so consecutive modules feel visually distinct,
   each with its own palette, top accent and entrance animation. Applied to
   whichever slide body is showing: content card, module intro, quiz, result. */
[data-theme="1"]{--th-a1:#0891b2;--th-a2:#2563eb}
[data-theme="2"]{--th-a1:#e11d48;--th-a2:#f59e0b}
[data-theme="3"]{--th-a1:#7c3aed;--th-a2:#4f46e5}
[data-theme="4"]{--th-a1:#16a34a;--th-a2:#84cc16}
[data-theme="5"]{--th-a1:#475569;--th-a2:#ea580c}
.slide-card[data-theme="1"]{background:radial-gradient(ellipse 620px 320px at 100% 0%,#cffafe 0%,transparent 60%),radial-gradient(ellipse 560px 300px at 0% 100%,#dbeafe 0%,transparent 62%),radial-gradient(rgba(8,145,178,.06) 1.4px,transparent 1.4px) 0 0/22px 22px,#fbfeff;border-color:#bfe3f0}
.slide-card[data-theme="2"]{background:radial-gradient(ellipse 620px 320px at 100% 0%,#ffe4e6 0%,transparent 60%),radial-gradient(ellipse 560px 300px at 0% 100%,#ffedd5 0%,transparent 62%),radial-gradient(rgba(225,29,72,.06) 1.4px,transparent 1.4px) 0 0/22px 22px,#fffaf8;border-color:#f6d0ce}
.slide-card[data-theme="3"]{background:radial-gradient(ellipse 620px 320px at 100% 0%,#ede9fe 0%,transparent 60%),radial-gradient(ellipse 560px 300px at 0% 100%,#e0e7ff 0%,transparent 62%),radial-gradient(rgba(124,58,237,.06) 1.4px,transparent 1.4px) 0 0/22px 22px,#fbfaff;border-color:#d9d0f5}
.slide-card[data-theme="4"]{background:radial-gradient(ellipse 620px 320px at 100% 0%,#dcfce7 0%,transparent 60%),radial-gradient(ellipse 560px 300px at 0% 100%,#ecfccb 0%,transparent 62%),radial-gradient(rgba(22,163,74,.06) 1.4px,transparent 1.4px) 0 0/22px 22px,#fafffa;border-color:#c7edc2}
.slide-card[data-theme="5"]{background:radial-gradient(ellipse 620px 320px at 100% 0%,#e2e8f0 0%,transparent 60%),radial-gradient(ellipse 560px 300px at 0% 100%,#fed7aa 0%,transparent 62%),radial-gradient(rgba(71,85,105,.06) 1.4px,transparent 1.4px) 0 0/22px 22px,#fbfbfa;border-color:#dcd3c4}
.slide-card[data-theme]::before{background:linear-gradient(90deg,var(--th-a1),var(--th-a2) 55%,var(--th-a1))}
.slide-card[data-theme="1"]::after{transform:rotate(6deg)}
.slide-card[data-theme="2"]::after{transform:rotate(-14deg)}
.slide-card[data-theme="3"]::after{transform:rotate(10deg)}
.slide-card[data-theme="4"]::after{transform:rotate(-6deg)}
.slide-card[data-theme="5"]::after{transform:rotate(14deg)}
.slide-card[data-theme="1"]{animation-name:slideInLeft}
.slide-card[data-theme="2"]{animation-name:slideInRight}
.slide-card[data-theme="3"]{animation-name:slideInScale}
.slide-card[data-theme="4"]{animation-name:slideInDrop}
.slide-card[data-theme="5"]{animation-name:slideInFlip}
@keyframes slideInLeft{from{opacity:0;transform:translateX(-26px)}to{opacity:1;transform:translateX(0)}}
@keyframes slideInRight{from{opacity:0;transform:translateX(26px)}to{opacity:1;transform:translateX(0)}}
@keyframes slideInScale{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}
@keyframes slideInDrop{from{opacity:0;transform:translateY(-22px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideInFlip{from{opacity:0;transform:perspective(700px) rotateX(-10deg)}to{opacity:1;transform:perspective(700px) rotateX(0)}}
.module-intro-hero[data-theme] .module-intro-frame{box-shadow:0 10px 34px rgba(13,43,30,.35),0 0 0 3px var(--th-a1)}
.quiz-q[data-theme]{border-top:4px solid var(--th-a1)}
.quiz-score[data-theme]{background:linear-gradient(135deg,var(--th-a2,var(--sgreen-dark)),var(--th-a1,var(--sgreen)) 60%,var(--gold))}
.slide-done-badge{display:inline-flex;align-items:center;gap:6px;background:var(--sgreen-pale);color:var(--sgreen-dark);font-weight:700;font-size:.85rem;padding:7px 16px;border-radius:99px;margin-top:22px;border:1px solid #bfe3cd}
.btn-cert{background:linear-gradient(135deg,#e8bd4e,var(--gold) 60%,var(--gold-dark));color:#3a2a04;font-weight:700;box-shadow:0 4px 14px rgba(201,151,30,.35);border:1px solid #a9820f}
.btn-cert:hover{filter:brightness(1.06)}
/* quiz */
.quiz-q{background:#fff;border:1px solid #eee0bb;border-radius:14px;padding:32px 36px;margin-bottom:0;box-shadow:0 2px 8px rgba(139,109,18,.05);max-width:820px;margin-left:auto;margin-right:auto;width:100%}
.quiz-q h4{margin-bottom:20px;font-size:1.35rem;color:#1c1305;line-height:1.5}
.quiz-opt{display:flex;gap:12px;align-items:center;padding:12px 14px;border:1.5px solid #ecdfb8;border-radius:10px;margin-bottom:9px;cursor:pointer;font-size:.93rem;background:#fffdf7;transition:.12s}
.quiz-opt::before{content:attr(data-letter);flex:none;width:26px;height:26px;border-radius:50%;background:var(--gold-pale);color:var(--gold-dark);font-weight:700;font-size:.78rem;display:flex;align-items:center;justify-content:center;border:1.5px solid #e9d9a8}
.quiz-opt:hover{border-color:var(--sgreen)}
.quiz-opt.sel{border-color:var(--gold);background:var(--gold-pale)}
.quiz-opt.correct{border-color:var(--green);background:#dcfce7}
.quiz-opt.correct::before{background:var(--green);color:#fff;border-color:var(--green);content:"✓"}
.quiz-opt.wrong{border-color:var(--red);background:#fee2e2}
.quiz-opt.wrong::before{background:var(--red);color:#fff;border-color:var(--red);content:"✕"}
.quiz-ex{font-size:.86rem;color:var(--sgreen-dark);background:var(--sgreen-pale);border-radius:10px;padding:12px 14px;margin-top:10px;border:1px solid #bfe3cd}
.quiz-score{background:linear-gradient(135deg,var(--sgreen-dark),var(--sgreen) 55%,var(--gold));color:#fff;border-radius:14px;padding:24px;text-align:center;margin-bottom:0;max-width:700px;margin-left:auto;margin-right:auto;width:100%}
.quiz-score b{font-size:1.9rem}

/* auth */
.auth-wrap{max-width:440px;margin:56px auto;background:#fff;border:1px solid var(--line);border-radius:18px;padding:34px;box-shadow:var(--shadow)}
.auth-wrap h1{font-size:1.5rem;margin-bottom:6px;letter-spacing:-.02em}
.auth-wrap .sub{color:var(--muted);font-size:.92rem;margin-bottom:22px}
.field{margin-bottom:15px}
.field label{display:block;font-weight:600;font-size:.86rem;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:10px;font-size:.95rem;font-family:inherit}
.field textarea{min-height:90px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid #a5f3fc;border-color:var(--primary)}
.role-pick{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:15px}
.role-pick .rp{border:1.5px solid var(--line);border-radius:12px;padding:14px;cursor:pointer;text-align:center}
.role-pick .rp.sel{border-color:var(--primary);background:#e0f2fe}
.role-pick .rp .ic{font-size:1.5rem}
.role-pick .rp b{display:block;font-size:.92rem}
.role-pick .rp span{font-size:.76rem;color:var(--muted)}
.auth-alt{text-align:center;font-size:.9rem;color:var(--muted);margin-top:16px}
.auth-alt a{color:var(--primary);font-weight:600}
.form-error{background:#fef2f2;color:#b91c1c;border-radius:10px;padding:10px 14px;font-size:.88rem;margin-bottom:14px}
.form-info{background:#ecfeff;color:#155e75;border-radius:10px;padding:10px 14px;font-size:.88rem;margin-bottom:14px}
.auth-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:18px}
.auth-tab{border:1.5px solid var(--line);background:#fff;border-radius:10px;padding:10px 8px;font-size:.85rem;font-weight:600;cursor:pointer;color:var(--muted)}
.auth-tab.sel{border-color:var(--primary);background:#e0f2fe;color:var(--primary)}
.phone-input{display:flex;align-items:stretch;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.phone-input .phone-cc{display:flex;align-items:center;padding:0 12px;background:#f4f6f9;font-weight:600;color:var(--muted);border-right:1px solid var(--line)}
.phone-input input{border:none!important;border-radius:0!important}
.phone-input input:focus{outline:none!important}
.phone-input:focus-within{outline:2px solid #a5f3fc;border-color:var(--primary)}

/* dashboard */
.dash-head{background:linear-gradient(135deg,#0f172a,#155e75);color:#fff;padding:40px 0}
.dash-head h1{font-size:1.7rem;letter-spacing:-.02em}
.dash-head p{color:#a5f3fc}
.dash-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px;margin-top:22px}
.dash-stat{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.15);border-radius:14px;padding:16px}
.dash-stat b{font-size:1.5rem;display:block}
.dash-stat span{font-size:.82rem;color:#a5f3fc}
.enroll-row{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:14px;align-items:center;box-shadow:var(--shadow)}
.enroll-row .thumb{width:86px;height:64px;border-radius:10px;display:grid;place-items:center;font-size:1.8rem;color:#fff;flex:none}
.enroll-row .info{flex:1;min-width:0}
.enroll-row h3{font-size:.98rem}
.enroll-row .meta{font-size:.8rem;color:var(--muted)}
.cert-banner{display:inline-flex;align-items:center;gap:6px;font-size:.78rem;background:#fef9c3;color:#854d0e;border-radius:99px;padding:3px 10px;font-weight:600}

/* instructor */
.table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.table th{background:var(--bg);text-align:left;font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);padding:12px 16px}
.table td{padding:13px 16px;border-top:1px solid var(--line);font-size:.92rem}
.badge{font-size:.75rem;font-weight:600;padding:3px 10px;border-radius:99px}
.badge.pub{background:#dcfce7;color:#166534}
.badge.draft{background:#fef3c7;color:#92400e}
.badge.soon{background:#fde68a;color:#78350f}
.modal-back{position:fixed;inset:0;background:rgba(15,23,42,.72);display:grid;place-items:center;z-index:100;padding:20px;animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal{background:#fff;border-radius:18px;padding:28px;max-width:560px;width:100%;max-height:88vh;overflow-y:auto;animation:modalPop .25s cubic-bezier(.22,.9,.32,1)}
@keyframes modalPop{from{opacity:0;transform:scale(.96) translateY(8px)}to{opacity:1;transform:scale(1) translateY(0)}}
.modal h2{font-size:1.25rem;margin-bottom:16px}
.video-modal{max-width:760px;padding:20px}
.video-modal-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.video-modal-head h2{margin-bottom:0;font-size:1.15rem}
.video-modal-close{background:var(--bg);border:none;width:32px;height:32px;border-radius:50%;cursor:pointer;font-size:.9rem;color:var(--muted)}
.video-modal-close:hover{background:var(--line);color:var(--ink)}
.video-modal-frame{border-radius:14px;overflow:hidden;background:#0f172a}
.video-modal-frame video{width:100%;display:block}
.video-modal-blurb{margin-top:14px;color:var(--muted);font-size:.92rem}
.builder-mod{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;background:#fff}
.builder-mod .bm-head{display:flex;justify-content:space-between;align-items:center;padding:13px 16px;background:var(--bg);font-weight:600;font-size:.92rem;border-radius:12px 12px 0 0}
.builder-mod .bm-les{display:flex;justify-content:space-between;align-items:center;padding:9px 16px;border-top:1px solid #f1f5f9;font-size:.88rem}

/* checkout */
.checkout-grid{display:grid;grid-template-columns:1fr 380px;gap:36px;align-items:start}
.pay-note{background:#fffbeb;border:1px solid #fde68a;color:#92400e;border-radius:12px;padding:12px 16px;font-size:.86rem;margin-bottom:18px}

/* certificate */
.certificate{background:#fff;border:10px double var(--primary);border-radius:8px;max-width:820px;margin:40px auto;padding:56px;text-align:center}
.certificate .logo{font-size:2.5rem}
.certificate h1{font-size:2rem;color:var(--primary-dark);margin:10px 0}
.certificate .name{font-size:1.8rem;font-weight:800;margin:16px 0;border-bottom:2px solid var(--line);display:inline-block;padding:0 30px 8px}
.certificate .course{font-size:1.2rem;font-weight:600;margin:10px 0}
.certificate .fine{color:var(--muted);font-size:.9rem;margin-top:24px}

/* mock tests */
.mock-hero{background:linear-gradient(135deg,#1e1b4b,#4c1d95 60%,#7e22ce)}
.exam-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px}
.exam-card{
  position:relative;cursor:pointer;overflow:hidden;background:#fff;border:1px solid var(--line);
  border-radius:20px;padding:0;transition:.25s cubic-bezier(.22,.9,.32,1);
  box-shadow:0 2px 8px rgba(15,23,42,.05)
}
.exam-card .lp-exam-img{height:150px;z-index:1}
.exam-card-body{position:relative;z-index:1;padding:20px 26px 24px}
.exam-card::before{content:"";position:absolute;top:0;left:0;right:0;height:6px;background:linear-gradient(90deg,var(--exam-a1,#0e7490),var(--exam-a2,#0891b2))}
.exam-card::after{
  content:"";position:absolute;top:-40%;left:-60%;width:60%;height:220%;
  background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.55) 50%,transparent 70%);
  transform:rotate(8deg);transition:left .6s ease;pointer-events:none
}
.exam-card:hover{transform:translateY(-7px);box-shadow:0 20px 40px var(--exam-shadow,rgba(15,23,42,.16));border-color:transparent}
.exam-card:hover::after{left:130%}
.exam-card.soon{opacity:.6;cursor:default}
.exam-card.soon:hover{transform:none;box-shadow:0 2px 8px rgba(15,23,42,.05)}
.exam-card .soon-tag{position:absolute;top:16px;right:16px;background:var(--bg);color:var(--muted);font-size:.68rem;font-weight:700;padding:3px 9px;border-radius:99px;text-transform:uppercase;letter-spacing:.03em;z-index:4}
.exam-card[data-exam="NEET"]{--exam-a1:#c026d3;--exam-a2:#7e22ce;--exam-shadow:rgba(192,38,211,.22)}
.exam-card[data-exam="JEE_MAIN"]{--exam-a1:#0284c7;--exam-a2:#0e7490;--exam-shadow:rgba(2,132,199,.22)}
.exam-card[data-exam="JEE_ADV"]{--exam-a1:#ea580c;--exam-a2:#c2410c;--exam-shadow:rgba(234,88,12,.22)}
.exam-tag{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--exam-a2,#0e7490);background:var(--bg);padding:4px 11px;border-radius:99px}
.exam-tag-float{position:absolute;top:12px;left:12px;z-index:3;background:#fff}
.exam-card[data-exam="NEET"] .exam-tag{background:#fae8ff;color:#86198f}
.exam-card[data-exam="JEE_MAIN"] .exam-tag{background:#e0f2fe;color:#075985}
.exam-card[data-exam="JEE_ADV"] .exam-tag{background:#ffedd5;color:#9a3412}
.exam-card h3{font-size:1.25rem;margin-bottom:10px;font-weight:800;color:#0f172a}
.exam-subjects{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.exam-chip{font-size:.74rem;font-weight:600;padding:4px 10px;border-radius:99px;background:var(--bg);color:#334155;border:1px solid var(--line)}
.exam-blurb{font-size:.87rem;color:var(--muted);margin-bottom:16px;line-height:1.55}
.exam-stats{display:flex;align-items:center;gap:8px;font-size:.8rem;font-weight:600;color:#334155;margin-bottom:16px}
.exam-stats .dot-sep{color:var(--line)}
.exam-cta{display:flex;align-items:center;gap:6px;font-weight:700;font-size:.92rem;color:var(--exam-a2,#0e7490)}
.exam-cta .arrow{display:inline-block;transition:transform .2s ease}
.exam-card:hover .exam-cta .arrow{transform:translateX(5px)}
.result-score{display:flex;flex-direction:column;align-items:center;text-align:center;padding:32px 20px}
.big-score{font-size:2.6rem;font-weight:800;color:var(--primary-dark)}
.score-breakdown{display:flex;gap:18px;margin-top:8px;font-weight:600;font-size:.95rem}
.score-breakdown .correct{color:var(--green)}
.score-breakdown .wrong{color:var(--red)}
.subject-bar-row{margin-bottom:16px}
.subject-bar-label{display:flex;justify-content:space-between;font-weight:600;margin-bottom:6px}
.subject-bar-track{height:10px;background:var(--bg);border-radius:99px;overflow:hidden}
.subject-bar-fill{height:100%;background:linear-gradient(90deg,var(--primary),#0891b2);border-radius:99px}
.swot-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.swot-card{border-radius:12px;padding:18px;border:1px solid var(--line)}
.swot-card h3{font-size:1rem;margin-bottom:10px}
.swot-card ul{padding-left:18px;font-size:.9rem;display:flex;flex-direction:column;gap:6px}
.swot-card.s{background:#f0fdf4;border-color:#bbf7d0}
.swot-card.w{background:#fef2f2;border-color:#fecaca}
.swot-card.o{background:#eff6ff;border-color:#bfdbfe}
.swot-card.t{background:#fff7ed;border-color:#fed7aa}
.attempt-trend{display:flex;align-items:flex-end;gap:10px;height:140px;padding-top:20px}
.trend-bar{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%}
.trend-fill{width:60%;background:#bae6fd;border-radius:4px 4px 0 0;position:relative;min-height:4px}
.trend-fill.current{background:var(--primary)}
.trend-val{font-size:.72rem;color:var(--muted);margin-top:4px}
.review-subject{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;overflow:hidden}
.review-subject summary{padding:12px 16px;cursor:pointer;font-weight:600;background:var(--bg)}
.review-q{padding:14px 16px;border-top:1px solid var(--line)}
.review-q .q-options{display:flex;flex-direction:column;gap:6px;margin:8px 0}
.review-q .q-option.review{padding:8px 12px;border-radius:8px;background:var(--bg);font-size:.88rem;display:flex;gap:8px;align-items:center}
.review-q .q-option.correct-opt{background:#dcfce7;color:#166534;font-weight:600}
.review-q .q-option.wrong-opt{background:#fef2f2;color:#991b1b;font-weight:600}
.review-q .q-explain{font-size:.85rem;color:var(--muted);margin-top:6px}

.exam-shell{display:flex;flex-direction:column;height:calc(100vh - 64px);background:#f1f5f9}
.exam-top{display:flex;align-items:center;gap:16px;padding:10px 20px;background:#0f172a;color:#fff}
.exam-timer{margin-left:auto;font-family:ui-monospace,monospace;font-size:1.2rem;font-weight:700;background:#1e293b;padding:4px 14px;border-radius:8px}
.exam-subjects{display:flex;gap:2px;background:#fff;border-bottom:1px solid var(--line);overflow-x:auto}
.subject-tab{padding:12px 18px;border:none;background:none;font-weight:600;color:var(--muted);cursor:pointer;white-space:nowrap;border-bottom:3px solid transparent}
.subject-tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.subject-tab .cnt{font-weight:400;font-size:.82rem}
.exam-body{flex:1;display:grid;grid-template-columns:1fr 300px;gap:0;overflow:hidden}
.exam-question{padding:26px 30px;overflow-y:auto;background:#fff}
.q-meta{font-size:.82rem;color:var(--muted);margin-bottom:10px;text-transform:uppercase;letter-spacing:.03em}
.q-meta .diff{background:var(--bg);padding:2px 8px;border-radius:6px}
.q-text{font-size:1.1rem;font-weight:600;margin-bottom:20px;line-height:1.5}
.q-options{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}
.q-option{display:flex;align-items:center;gap:12px;padding:12px 16px;border:1px solid var(--line);border-radius:10px;cursor:pointer;transition:.12s}
.q-option:hover{border-color:var(--primary)}
.q-option.selected{background:#e0f2fe;border-color:var(--primary)}
.opt-letter{width:26px;height:26px;border-radius:50%;background:var(--bg);display:grid;place-items:center;font-weight:700;font-size:.82rem;flex-shrink:0}
.q-option.selected .opt-letter{background:var(--primary);color:#fff}
.q-actions{display:flex;gap:10px;flex-wrap:wrap}
.exam-palette{background:#f8fafc;border-left:1px solid var(--line);padding:18px;overflow-y:auto}
.palette-legend{display:flex;flex-direction:column;gap:6px;font-size:.76rem;color:var(--muted);margin-bottom:16px}
.palette-legend .dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px}
.dot.nv{background:#cbd5e1}.dot.na{background:#ef4444}.dot.an{background:#22c55e}.dot.mr{background:#a855f7}.dot.am{background:#a855f7;box-shadow:0 0 0 2px #22c55e inset}
.palette-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(36px,1fr));gap:6px}
.pnum{width:36px;height:36px;border-radius:8px;border:none;font-weight:700;font-size:.85rem;cursor:pointer;color:#fff;background:#cbd5e1}
.pnum.nv{background:#cbd5e1;color:#334155}
.pnum.na{background:#ef4444}
.pnum.an{background:#22c55e}
.pnum.mr{background:#a855f7}
.pnum.am{background:#a855f7;box-shadow:0 0 0 2px #22c55e inset}
.pnum.active{outline:3px solid #0f172a;outline-offset:1px}

@media(max-width:820px){
  .exam-body{grid-template-columns:1fr}
  .exam-palette{border-left:none;border-top:1px solid var(--line)}
  .swot-grid{grid-template-columns:1fr}
}

/* misc */
.empty-state{text-align:center;padding:70px 20px;color:var(--muted)}
.empty-state .ic{font-size:3rem;display:block;margin-bottom:10px}
.loading-page{display:grid;place-items:center;padding:110px 20px;color:var(--muted)}
.spinner{width:38px;height:38px;border:4px solid var(--line);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:12px}
@keyframes spin{to{transform:rotate(360deg)}}
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(120%);background:#0f172a;color:#fff;padding:12px 22px;border-radius:12px;font-size:.92rem;transition:.3s;z-index:200;box-shadow:0 10px 30px rgba(0,0,0,.3)}
.toast.show{transform:translateX(-50%) translateY(0)}
.footer{background:#0f172a;color:#cbd5e1;margin-top:60px}
.footer-grid{max-width:1200px;margin:0 auto;padding:48px 24px;display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:34px;font-size:.9rem}
.footer h4{color:#fff;margin-bottom:12px;font-size:.95rem}
.footer a{display:block;margin-bottom:8px;color:#94a3b8}
.footer a:hover{color:#fff}
.footer .brand{color:#fff;margin-bottom:12px}
.footer p{color:#94a3b8;font-size:.85rem}
.footer .muted{color:#64748b;font-size:.82rem}
.footer-bottom{border-top:1px solid #1e293b;text-align:center;padding:18px;font-size:.82rem;color:#64748b}
.teach-hero{background:linear-gradient(135deg,#3b0764,#7e22ce);color:#fff;padding:70px 0;text-align:center}
.teach-hero h1{font-size:2.4rem;letter-spacing:-.03em;margin-bottom:14px}
.teach-hero p{color:#e9d5ff;max-width:640px;margin:0 auto 26px;font-size:1.08rem}
.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}
.step-card{position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px 22px;box-shadow:0 1px 3px rgba(15,23,42,.05);transition:transform .22s ease,box-shadow .22s ease}
.step-card:hover{transform:translateY(-5px);box-shadow:0 16px 30px rgba(15,23,42,.1)}
.step-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--step-a1,#0e7490),var(--step-a2,#0891b2))}
.step-card::after{content:attr(data-step);position:absolute;top:8px;right:16px;font-size:2.7rem;font-weight:800;color:#f1f5f9;line-height:1;z-index:0}
.step-card .num{position:relative;z-index:1;width:52px;height:52px;border-radius:15px;background:linear-gradient(135deg,var(--step-a1,#0e7490),var(--step-a2,#0891b2));color:#fff;display:grid;place-items:center;margin-bottom:16px;box-shadow:0 8px 18px rgba(14,116,144,.25)}
.step-card .num svg{width:24px;height:24px}
.step-card h3{position:relative;z-index:1;font-size:1.03rem;font-weight:700;margin-bottom:6px}
.step-card p{position:relative;z-index:1}

@media(max-width:960px){
  .hero-grid,.detail-grid,.detail-cols,.checkout-grid{grid-template-columns:1fr}
  /* the full-page slide layout is a desktop feature -- on narrow screens we
     fall back to normal stacked, scrolling flow so nothing gets clipped */
  .player{grid-template-columns:1fr;height:auto;overflow:visible}
  .player-side{position:static;max-height:none;height:auto;overflow:visible;border-right:none;border-bottom:1px solid var(--line)}
  .player-main{padding:26px 20px;height:auto;overflow:visible;display:block}
  .player-main>.slide-card,.player-main>.module-intro-hero,.player-main>.quiz-q,.player-main>.quiz-score{
    flex:none;overflow:visible;display:block
  }
  .lesson-content,.quiz-q,.quiz-score,.module-intro-hero{max-width:none}
  .slide-card{padding:28px 26px}
  .lesson-content{font-size:1.2rem}
  .footer-grid{grid-template-columns:1fr 1fr}
  .outcome-list{grid-template-columns:1fr}
  .topnav{display:none}
  .topbar-right{display:none}
  .hamburger{display:block}
  .hero h1{font-size:2.1rem}
  .buy-card{position:static}
}
@media print{
  .topbar,.footer,.no-print{display:none !important}
  .certificate{border-color:#0e7490;margin:0}
}