:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #0ea5e9;
  --accent: #f59e0b;
  --dark: #0f172a;
  --light-bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #334155;
  --muted: #64748b;
  --border: #e2e8f0;
  --green: #16a34a;
  --red: #dc2626;
  --radius: 16px;
  --shadow: 0 10px 30px -12px rgba(15, 23, 42, .15);
  --ease: cubic-bezier(.2,.7,.2,1);
  --t: .25s var(--ease);
  --tr: color var(--t), background-color var(--t), border-color var(--t), box-shadow var(--t), transform var(--t);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { font-family: "Inter", system-ui, sans-serif; color: var(--text); background: #fff; line-height: 1.6; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.hidden { display: none !important; }
.center { text-align: center; }
.muted { color: var(--muted); }
code { background: #eef2ff; color: var(--primary-dark); padding: 1px 6px; border-radius: 6px; font-size: .9em; }

.nav { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand strong { display: block; color: var(--dark); font-size: 15px; line-height: 1.1; }
.brand small { color: var(--muted); font-size: 12px; }
.brand-logo { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--primary), var(--secondary)); }
.menu { display: flex; gap: 2px; align-items: center; }
.menu a { padding: 8px 10px; border-radius: 10px; font-size: 13.5px; font-weight: 500; color: var(--text); transition: var(--tr); white-space: nowrap; }
.menu a:hover, .menu a.active { color: var(--primary); background: #eff6ff; }
.menu .menu-cta { background: var(--primary); color: #fff; margin-left: 6px; }
.menu .menu-cta:hover { background: var(--primary-dark); color: #fff; }
.burger { display: none; background: none; border: 1px solid var(--border); width: 42px; height: 42px; border-radius: 10px; font-size: 18px; cursor: pointer; color: var(--dark); }

@media (max-width: 1100px) {
  .burger { display: block; }
  .menu { position: fixed; top: 68px; left: 0; right: 0; flex-direction: column; align-items: stretch; background: #fff; padding: 12px 20px 20px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); transform: translateY(-120%); visibility: hidden; transition: transform .3s var(--ease), visibility 0s .3s; max-height: calc(100vh - 68px); overflow-y: auto; }
  .menu.open { transform: translateY(0); visibility: visible; transition: transform .3s var(--ease); }
  .menu a { padding: 12px; font-size: 15px; }
  .menu .menu-cta { margin: 6px 0 0; text-align: center; }
}

.hero { padding: 72px 0 80px; background: radial-gradient(circle at 10% 10%, #dbeafe 0, transparent 40%), radial-gradient(circle at 90% 30%, #e0f2fe 0, transparent 40%), var(--light-bg); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.badge { display: inline-flex; gap: 8px; align-items: center; background: #fff; border: 1px solid var(--border); padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--primary); }
.hero h1 { font-size: clamp(32px, 4.6vw, 52px); line-height: 1.12; color: var(--dark); font-weight: 800; margin: 18px 0; letter-spacing: -.02em; }
.grad { background: linear-gradient(90deg, var(--primary), var(--secondary)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 17px; color: var(--muted); max-width: 560px; }
.hero-btns { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 18px; border-radius: 12px; font-weight: 600; font-size: 14px; border: 1px solid transparent; cursor: pointer; transition: var(--tr); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px -8px var(--primary); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-ghost { background: #fff; border-color: var(--border); color: var(--dark); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.author-card { display: inline-flex; align-items: center; gap: 12px; background: #fff; padding: 10px 18px 10px 10px; border-radius: 999px; border: 1px solid var(--border); box-shadow: var(--shadow); }
.author-card strong { display: block; color: var(--dark); }
.author-card span { font-size: 13px; color: var(--muted); }
.avatar { width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; color: #fff; background: linear-gradient(135deg, var(--primary), var(--accent)); }
.tiles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.tile { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; display: flex; flex-direction: column; gap: 4px; transition: var(--tr); }
.tile i { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: #eff6ff; color: var(--primary); margin-bottom: 8px; }
.tile b { color: var(--dark); font-size: 15px; }
.tile span { color: var(--muted); font-size: 13px; }
.tile:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #bfdbfe; }
.tile:nth-child(3n+2) i { background: #fef3c7; color: #b45309; }
.tile:nth-child(3n) i { background: #e0f2fe; color: #0369a1; }

.section { padding: 84px 0; }
.section.alt { background: var(--light-bg); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.sec-head { max-width: 780px; margin-bottom: 36px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--primary); }
.eyebrow.light { color: #bfdbfe; }
.sec-head h2 { font-size: clamp(26px, 3.4vw, 38px); color: var(--dark); line-height: 1.2; margin: 10px 0 12px; letter-spacing: -.01em; }
.sec-head p { color: var(--muted); }
.sub-title { color: var(--dark); font-size: 22px; margin: 40px 0 18px; }
.note { font-size: 13px; color: var(--muted); margin-top: 16px; }
.live-dot { position: relative; width: 9px; height: 9px; border-radius: 50%; background: var(--red); }
.live-dot::after { content: ""; position: absolute; inset: 0; border-radius: 50%; background: var(--red); animation: pulse 1.6s ease-out infinite; }
@keyframes pulse { from { transform: scale(1); opacity: .6; } to { transform: scale(3); opacity: 0; } }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 28px; }
.stat { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; position: relative; overflow: hidden; }
.stat::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: linear-gradient(var(--primary), var(--secondary)); }
.stat b { display: block; font-size: 32px; font-weight: 800; color: var(--dark); line-height: 1.1; }
.stat span { font-size: 14px; color: var(--muted); }

.cards { display: grid; gap: 18px; }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }
.card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; transition: var(--tr); }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.card .ic { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; font-size: 22px; color: #fff; background: linear-gradient(135deg, var(--primary), var(--secondary)); margin-bottom: 16px; }
.card .tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--primary); background: #eff6ff; padding: 3px 10px; border-radius: 999px; margin-bottom: 10px; }
.card h3 { color: var(--dark); font-size: 18px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14.5px; }

.tabs { display: inline-flex; background: #e2e8f0; padding: 4px; border-radius: 12px; gap: 4px; margin-bottom: 20px; flex-wrap: wrap; }
.tab { border: 0; background: transparent; padding: 9px 16px; border-radius: 9px; font-weight: 600; font-size: 14px; color: var(--muted); cursor: pointer; transition: var(--tr); }
.tab.active { background: #fff; color: var(--primary); box-shadow: 0 2px 8px rgba(0,0,0,.06); }
.tabs.small { margin: 0; }
.tabs.small .tab { padding: 7px 12px; font-size: 13px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.toolbar .chips { margin: 0; }
.chip { border: 1px solid var(--border); background: #fff; padding: 7px 14px; border-radius: 999px; font-size: 13.5px; font-weight: 600; cursor: pointer; color: var(--text); transition: var(--tr); }
.chip.active, .chip:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.toolbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 18px; }
.toolbar .tabs { margin: 0; }
select { padding: 10px 14px; border-radius: 10px; border: 1px solid var(--border); background: #fff; color: var(--text); }
.search { display: flex; align-items: center; gap: 8px; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 0 12px; flex: 1; min-width: 200px; }
.search.wide { margin-bottom: 16px; max-width: 520px; }
.search input { border: 0; outline: 0; padding: 10px 0; width: 100%; background: transparent; }
.search i { color: var(--muted); }

.official-list { columns: 3 240px; column-gap: 24px; list-style: none; counter-reset: n; }
.official-list li { counter-increment: n; break-inside: avoid; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px 12px 50px; margin-bottom: 10px; position: relative; font-weight: 500; color: var(--dark); font-size: 14.5px; }
.official-list li::before { content: counter(n); position: absolute; left: 12px; top: 50%; transform: translateY(-50%); width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; background: #eff6ff; color: var(--primary); font-size: 12px; font-weight: 700; }

.win-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin-bottom: 24px; }
.win { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; display: flex; gap: 14px; align-items: flex-start; transition: var(--tr); }
.win:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.medal { flex: none; width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; color: #fff; font-size: 15px; }
.medal.p1 { background: linear-gradient(135deg, #fbbf24, #d97706); }
.medal.p2 { background: linear-gradient(135deg, #cbd5e1, #64748b); }
.medal.p3 { background: linear-gradient(135deg, #fdba74, #c2410c); }
.win h4 { color: var(--dark); font-size: 16px; }
.win p { font-size: 13.5px; color: var(--muted); }
.win .subj { display: inline-block; margin-top: 6px; font-size: 12px; font-weight: 600; background: #eff6ff; color: var(--primary); padding: 2px 10px; border-radius: 999px; }

.results-frame { background: var(--light-bg); border: 2px dashed var(--border); border-radius: var(--radius); min-height: 260px; display: grid; place-items: center; overflow: hidden; }
.results-frame iframe { width: 100%; height: 640px; border: 0; background: #fff; }
.empty { text-align: center; color: var(--muted); padding: 40px; }
.empty i { font-size: 40px; color: var(--primary); margin-bottom: 12px; }

.pill-date { display: inline-flex; gap: 8px; align-items: center; background: #fff; border: 1px solid var(--border); padding: 6px 14px; border-radius: 999px; font-weight: 600; color: var(--dark) !important; }
.next-exam { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; background: linear-gradient(135deg, var(--dark), #1e3a8a); color: #fff; border-radius: 20px; padding: 28px 32px; margin-bottom: 24px; box-shadow: var(--shadow); }
.next-exam h3 { font-size: 24px; margin: 6px 0; }
.next-exam p { color: #cbd5e1; font-size: 14px; }
.countdown { background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2); padding: 14px 22px; border-radius: 14px; text-align: center; }
.countdown span { display: block; font-size: 12px; color: #bfdbfe; text-transform: uppercase; letter-spacing: .05em; }
.countdown strong { font-size: 26px; font-variant-numeric: tabular-nums; }
.date-strip { display: flex; gap: 10px; overflow-x: auto; padding-bottom: 8px; margin-bottom: 18px; }
.date-pill { flex: none; border: 1px solid var(--border); background: #fff; border-radius: 12px; padding: 8px 14px; text-align: center; cursor: pointer; transition: var(--tr); }
.date-pill b { display: block; font-size: 20px; color: var(--dark); }
.date-pill span { font-size: 12px; color: var(--muted); }
.date-pill.active { background: var(--primary); border-color: var(--primary); }
.date-pill.active b, .date-pill.active span { color: #fff; }
.exam-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.exam { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; border-top: 4px solid var(--primary); }
.exam.done { border-top-color: var(--muted); opacity: .75; }
.exam.live { border-top-color: var(--red); }
.exam h4 { color: var(--dark); font-size: 16px; margin: 6px 0 10px; }
.exam .row { display: flex; justify-content: space-between; font-size: 13.5px; padding: 4px 0; border-bottom: 1px dashed var(--border); }
.exam .row:last-child { border: 0; }
.status { display: inline-block; font-size: 12px; font-weight: 700; padding: 2px 10px; border-radius: 999px; }
.status.upcoming { background: #eff6ff; color: var(--primary); }
.status.live { background: #fee2e2; color: var(--red); }
.status.done { background: #f1f5f9; color: var(--muted); }
.rule { margin-top: 22px; background: #fff; border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: 12px; padding: 14px 18px; font-size: 14px; }
.rule i { color: var(--accent); }

.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { background: #f1f5f9; color: var(--dark); text-align: left; padding: 12px 14px; font-weight: 700; white-space: nowrap; }
td { padding: 11px 14px; border-top: 1px solid var(--border); }
tr:hover td { background: #f8fafc; }
.bar { height: 8px; background: #e2e8f0; border-radius: 99px; overflow: hidden; min-width: 90px; }
.bar i { display: block; height: 100%; border-radius: 99px; }
.q-cell { display: flex; align-items: center; gap: 10px; font-weight: 700; }

.charts { display: grid; grid-template-columns: 1.4fr 1fr; gap: 18px; margin-top: 22px; }
.chart-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.chart-card h4 { color: var(--dark); margin-bottom: 12px; }

.timeline { display: grid; gap: 12px; }
.tl { display: grid; grid-template-columns: 110px 1fr; gap: 16px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; align-items: center; }
.tl .g { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; font-weight: 800; border-radius: 12px; text-align: center; padding: 12px 6px; }
.tl h4 { color: var(--dark); }
.tl p { font-size: 13.5px; color: var(--muted); }

.formula { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; font-size: 15px; }
.formula .term { background: var(--light-bg); padding: 8px 14px; border-radius: 10px; }
.formula .term b { color: var(--dark); }
.formula .op { font-size: 20px; font-weight: 800; color: var(--primary); }
.formula .res { background: var(--primary); color: #fff; padding: 8px 14px; border-radius: 10px; font-weight: 700; }
.callout { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; border-radius: 12px; padding: 14px 18px; margin-bottom: 20px; font-size: 14px; }

.footer { background: var(--dark); color: #cbd5e1; padding: 64px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.footer h3 { color: #fff; font-size: 24px; }
.footer h4 { color: #fff; margin-bottom: 16px; }
.footer .muted { color: #94a3b8; }
.motto { color: var(--accent); font-weight: 700; margin: 12px 0 6px; }
.socials { display: grid; gap: 10px; }
.socials a { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-radius: 12px; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.08); transition: var(--tr); }
.socials a:hover { background: rgba(255,255,255,.1); color: #fff; }
.socials i { width: 20px; text-align: center; color: var(--secondary); }
.copy { border-top: 1px solid rgba(255,255,255,.1); margin-top: 40px; padding-top: 20px; font-size: 13px; color: #94a3b8; text-align: center; }
.to-top { position: fixed; right: 20px; bottom: 20px; width: 46px; height: 46px; border-radius: 50%; border: 0; background: var(--primary); color: #fff; cursor: pointer; box-shadow: var(--shadow); opacity: 0; transform: translateY(10px); pointer-events: none; transition: opacity var(--t), transform var(--t); }
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }

.reveal { opacity: 0; transform: translate3d(0, 18px, 0); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.load-error { background: #fee2e2; color: #991b1b; text-align: center; padding: 10px; font-weight: 600; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 960px) {
  .hero-grid, .charts, .footer-grid { grid-template-columns: 1fr; }
  .cards-3, .cards-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .section { padding: 60px 0; }
  .hero { padding: 48px 0 56px; }
  .cards-3, .cards-4 { grid-template-columns: 1fr; }
  .tiles { gap: 10px; }
  .tile { padding: 14px; }
  .next-exam { padding: 22px; }
  .tl { grid-template-columns: 80px 1fr; }
  .stat b { font-size: 26px; }
}