:root {
  --bg: #faf7f2; --surface: #ffffff; --surface-2: #f3eee5; --line: #e6dfd2;
  --ink: #1b1f3b; --ink-2: #4a4f6b; --ink-3: #8a8ea6;
  --brand: #e8590c; --brand-ink: #ffffff; --brand-soft: #fff0e6;
  --accent: #0f766e; --accent-soft: #e3f4f1;
  --ok: #1f9d55; --ok-soft: #e4f6ec; --bad: #d64545; --bad-soft: #fdeaea; --warn: #b7791f;
  --mark: #6b46c1; --mark-soft: #efe9fb;
  --shadow: 0 1px 2px rgb(27 31 59 / .06), 0 8px 24px -12px rgb(27 31 59 / .18);
  --r: 14px; --r-sm: 9px;
  --f-display: 'Bricolage Grotesque', 'Noto Sans', system-ui, sans-serif;
  --f-body: 'Noto Sans', 'Noto Sans Devanagari', system-ui, -apple-system, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12131c; --surface: #1b1d2a; --surface-2: #232637; --line: #2e3247;
    --ink: #eef0f8; --ink-2: #b6bad0; --ink-3: #7d8199;
    --brand: #ff8a3d; --brand-ink: #1b1206; --brand-soft: #3a2416;
    --accent: #34c3b3; --accent-soft: #15332f; --ok: #3ccf7f; --ok-soft: #15301f; --bad: #ff6b6b; --bad-soft: #3a1c1c; --mark: #a78bfa; --mark-soft: #2a2244;
    --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 8px 24px -12px rgb(0 0 0 / .6); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #12131c; --surface: #1b1d2a; --surface-2: #232637; --line: #2e3247;
  --ink: #eef0f8; --ink-2: #b6bad0; --ink-3: #7d8199;
  --brand: #ff8a3d; --brand-ink: #1b1206; --brand-soft: #3a2416;
  --accent: #34c3b3; --accent-soft: #15332f; --ok: #3ccf7f; --ok-soft: #15301f; --bad: #ff6b6b; --bad-soft: #3a1c1c; --mark: #a78bfa; --mark-soft: #2a2244;
  --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 8px 24px -12px rgb(0 0 0 / .6); color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 var(--f-body); }
a { color: inherit; }
button, input, select { font: inherit; color: inherit; }
h1, h2, h3, .display { font-family: var(--f-display); letter-spacing: -0.02em; line-height: 1.15; margin: 0; }
h1 { font-size: clamp(28px, 5vw, 48px); font-weight: 800; }
h2 { font-size: clamp(20px, 3vw, 26px); font-weight: 700; }
h3 { font-size: 17px; font-weight: 700; }
p { margin: 0; }
.muted { color: var(--ink-2); } .faint { color: var(--ink-3); font-size: 13px; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 16px; }
.stack > * + * { margin-top: var(--gap, 16px); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.hi { font-family: 'Noto Sans Devanagari', var(--f-body); }

/* header */
.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 18px; height: 60px; }
.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; font: 800 21px var(--f-display); letter-spacing: -0.03em; }
.logo-mark { width: 30px; height: 30px; border-radius: 9px; background: var(--brand); color: var(--brand-ink); display: grid; place-items: center; font-size: 18px; margin-right: 2px; }
.logo b { color: var(--brand); }
.nav { display: flex; gap: 4px; }
.nav a { text-decoration: none; padding: 7px 12px; border-radius: 999px; color: var(--ink-2); font-weight: 600; font-size: 14px; }
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav a.on { background: var(--ink); color: var(--bg); }
.pill-btn { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 6px 12px; cursor: pointer; font-weight: 600; font-size: 13px; }
.streak { font-weight: 700; font-size: 13px; color: var(--brand); }
.bottom-nav { display: none; }
@media (max-width: 820px) {
  .nav { display: none; }
  .bottom-nav { display: grid; grid-template-columns: repeat(5, 1fr); position: fixed; bottom: 0; left: 0; right: 0; z-index: 20; background: var(--surface); border-top: 1px solid var(--line); padding: 6px 0 calc(6px + env(safe-area-inset-bottom)); }
  .bottom-nav a { text-decoration: none; display: grid; justify-items: center; font-size: 11px; color: var(--ink-3); font-weight: 600; }
  .bottom-nav a span { font-size: 19px; line-height: 1.3; }
  .bottom-nav a.on { color: var(--brand); }
  main#view { padding-bottom: 80px; }
}

/* buttons, cards */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 11px; padding: 11px 18px; font-weight: 700; cursor: pointer; text-decoration: none; background: var(--brand); color: var(--brand-ink); transition: transform .08s, filter .15s; }
.btn:hover { filter: brightness(1.05); } .btn:active { transform: translateY(1px); }
.btn.ghost { background: var(--surface); color: var(--ink); border: 1px solid var(--line); }
.btn.dark { background: var(--ink); color: var(--bg); }
.btn.sm { padding: 7px 12px; font-size: 13px; border-radius: 9px; }
.btn[disabled] { opacity: .45; pointer-events: none; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; box-shadow: var(--shadow); }
.card.flat { box-shadow: none; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(var(--min, 240px), 1fr)); }
.tag { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; font-weight: 700; padding: 3px 9px; border-radius: 999px; background: var(--surface-2); color: var(--ink-2); }
.tag.brand { background: var(--brand-soft); color: var(--brand); }
.tag.accent { background: var(--accent-soft); color: var(--accent); }
.tag.ok { background: var(--ok-soft); color: var(--ok); } .tag.bad { background: var(--bad-soft); color: var(--bad); }
section.block { padding: 34px 0 6px; }
.sec-head { display: flex; align-items: end; justify-content: space-between; gap: 12px; margin-bottom: 14px; }

/* hero */
.hero { padding: 48px 0 20px; display: grid; grid-template-columns: 1.25fr .9fr; gap: 32px; align-items: center; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero .lede { font-size: 17px; color: var(--ink-2); max-width: 54ch; margin-top: 14px; }
.search { position: relative; margin-top: 22px; max-width: 520px; }
.search input { width: 100%; padding: 14px 16px 14px 44px; border-radius: 14px; border: 1.5px solid var(--line); background: var(--surface); font-size: 16px; box-shadow: var(--shadow); }
.search input:focus { outline: none; border-color: var(--brand); }
.search::before { content: '⌕'; position: absolute; left: 16px; top: 50%; transform: translateY(-52%); font-size: 21px; color: var(--ink-3); }
.suggest { position: absolute; left: 0; right: 0; top: calc(100% + 6px); background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); overflow: hidden; z-index: 5; }
.suggest a { display: flex; justify-content: space-between; gap: 10px; padding: 10px 14px; text-decoration: none; border-bottom: 1px solid var(--line); }
.suggest a:last-child { border: 0; } .suggest a:hover, .suggest a.act { background: var(--surface-2); }
.hero-board { background: var(--ink); color: var(--bg); border-radius: 22px; padding: 22px; position: relative; overflow: hidden; }
.hero-board::after { content: ''; position: absolute; right: -60px; top: -60px; width: 200px; height: 200px; border-radius: 50%; background: var(--brand); opacity: .9; }
.hero-board > * { position: relative; z-index: 1; }
.hb-q { background: color-mix(in srgb, var(--bg) 8%, transparent); border: 1px solid color-mix(in srgb, var(--bg) 18%, transparent); border-radius: 14px; padding: 14px; margin-top: 14px; }
.hb-opt { display: block; width: 100%; text-align: left; margin-top: 8px; padding: 9px 12px; border-radius: 10px; border: 1px solid color-mix(in srgb, var(--bg) 22%, transparent); background: transparent; color: inherit; cursor: pointer; }
.hb-opt.ok { background: var(--ok); border-color: var(--ok); color: #fff; } .hb-opt.bad { background: var(--bad); border-color: var(--bad); color: #fff; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 26px; }
.stat b { display: block; font: 800 26px var(--f-display); } .stat span { font-size: 13px; color: var(--ink-2); }
@media (max-width: 820px) { .hero { grid-template-columns: 1fr; padding-top: 28px; } .stats { grid-template-columns: repeat(2, 1fr); } }

/* category + exam cards */
.cat { display: flex; gap: 12px; align-items: center; text-decoration: none; padding: 14px; border-radius: var(--r); background: var(--surface); border: 1px solid var(--line); transition: border-color .15s, transform .15s; }
.cat:hover { border-color: var(--brand); transform: translateY(-2px); }
.cat .ico { width: 44px; height: 44px; border-radius: 12px; background: var(--surface-2); display: grid; place-items: center; font-size: 22px; flex: none; }
.exam { display: flex; flex-direction: column; gap: 10px; text-decoration: none; padding: 16px; border-radius: var(--r); background: var(--surface); border: 1px solid var(--line); transition: border-color .15s, transform .15s; }
.exam:hover { border-color: var(--brand); transform: translateY(-2px); }
.exam .meta { display: flex; flex-wrap: wrap; gap: 6px; }
.exam .name { font: 700 16px var(--f-display); }
.chips { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; scrollbar-width: none; }
.chip { flex: none; border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 7px 14px; font-weight: 600; font-size: 14px; cursor: pointer; text-decoration: none; white-space: nowrap; }
.chip.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.feature { padding: 20px; border-radius: var(--r); background: var(--surface-2); }
.feature .big { font-size: 26px; }

/* exam detail */
.exam-hero { padding: 28px 0 8px; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin-top: 18px; }
.fact { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.fact b { display: block; font: 800 20px var(--f-display); } .fact span { font-size: 12px; color: var(--ink-3); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line); margin: 22px 0 16px; overflow-x: auto; }
.tabs button { border: 0; background: none; padding: 10px 14px; font-weight: 700; color: var(--ink-3); border-bottom: 2.5px solid transparent; cursor: pointer; white-space: nowrap; }
.tabs button.on { color: var(--ink); border-color: var(--brand); }
.test-row { display: flex; align-items: center; gap: 14px; padding: 14px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
.test-row + .test-row { margin-top: 10px; }
.test-row .num { width: 40px; height: 40px; border-radius: 10px; background: var(--brand-soft); color: var(--brand); display: grid; place-items: center; font: 800 15px var(--f-display); flex: none; }
.test-row .info { flex: 1; min-width: 0; }
.test-row .info b { display: block; }
table.pattern { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: 12px; overflow: hidden; border: 1px solid var(--line); }
.pattern th, .pattern td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line); font-size: 14px; }
.pattern th { background: var(--surface-2); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-2); }
.pattern tr:last-child td { border-bottom: 0; }
.table-wrap { overflow-x: auto; }
ul.ticks { list-style: none; padding: 0; margin: 0; } ul.ticks li { padding: 8px 0 8px 26px; position: relative; border-bottom: 1px dashed var(--line); }
ul.ticks li::before { content: '✓'; position: absolute; left: 4px; color: var(--accent); font-weight: 800; }

/* instructions */
.instr { max-width: 820px; margin: 24px auto; }
.instr ol { padding-left: 20px; } .instr li { margin: 6px 0; }
.legend { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 8px; margin: 12px 0; font-size: 13px; }
.legend div { display: flex; gap: 8px; align-items: center; }

/* CBT (exam interface) */
body.in-test .top, body.in-test .bottom-nav { display: none; }
body.in-test main#view { padding: 0; }
.cbt { position: fixed; inset: 0; display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: auto auto minmax(0, 1fr) auto; background: var(--bg); z-index: 50; }
.cbt-top { display: flex; align-items: center; gap: 12px; padding: 10px 16px; background: var(--ink); color: var(--bg); }
.cbt-top .ttl { font-weight: 700; flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.timer { font: 800 18px var(--f-display); font-variant-numeric: tabular-nums; background: color-mix(in srgb, var(--bg) 12%, transparent); padding: 5px 12px; border-radius: 9px; }
.timer.low { background: var(--bad); color: #fff; animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .7; } }
.cbt-top select { background: transparent; color: inherit; border: 1px solid color-mix(in srgb, var(--bg) 30%, transparent); border-radius: 8px; padding: 4px 8px; }
.cbt-top select option { color: #000; }
.cbt-secs { display: flex; gap: 6px; padding: 8px 16px; background: var(--surface); border-bottom: 1px solid var(--line); overflow-x: auto; }
.cbt-secs button { flex: none; border: 1px solid var(--line); background: var(--surface-2); border-radius: 8px; padding: 6px 12px; font-weight: 600; font-size: 13px; cursor: pointer; }
.cbt-secs button.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.cbt-secs button[disabled] { opacity: .45; cursor: not-allowed; }
.cbt-body { display: grid; grid-template-columns: minmax(0, 1fr) 300px; min-height: 0; }
.cbt-q { overflow-y: auto; padding: 18px 22px 30px; }
.qhead { display: flex; align-items: center; gap: 10px; padding-bottom: 12px; border-bottom: 1px solid var(--line); margin-bottom: 16px; flex-wrap: wrap; }
.qhead b { font: 700 16px var(--f-display); }
.qtext { font-size: 17px; line-height: 1.6; white-space: pre-line; }
.opts { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 10px; max-width: 760px; }
.opt { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 12px; background: var(--surface); cursor: pointer; transition: border-color .12s, background .12s; }
.opt:hover { border-color: var(--ink-3); }
.opt .key { width: 26px; height: 26px; border-radius: 50%; border: 1.5px solid var(--ink-3); display: grid; place-items: center; font-weight: 700; font-size: 13px; flex: none; }
.opt.sel { border-color: var(--accent); background: var(--accent-soft); } .opt.sel .key { background: var(--accent); border-color: var(--accent); color: #fff; }
.opt.right { border-color: var(--ok); background: var(--ok-soft); } .opt.right .key { background: var(--ok); border-color: var(--ok); color: #fff; }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); } .opt.wrong .key { background: var(--bad); border-color: var(--bad); color: #fff; }
.cbt-pal { border-left: 1px solid var(--line); background: var(--surface); overflow-y: auto; padding: 14px; }
.pal-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-top: 12px; }
.pq { aspect-ratio: 1; border: 0; font-weight: 700; font-size: 13px; cursor: pointer; display: grid; place-items: center; position: relative; }
.st-notvisited { background: var(--surface-2); color: var(--ink-2); border-radius: 8px; border: 1px solid var(--line); }
.st-notans { background: var(--bad); color: #fff; border-radius: 10px 10px 2px 2px; }
.st-answered { background: var(--ok); color: #fff; border-radius: 2px 2px 10px 10px; }
.st-marked { background: var(--mark); color: #fff; border-radius: 50%; }
.st-ansmarked { background: var(--mark); color: #fff; border-radius: 50%; }
.st-ansmarked::after { content: ''; position: absolute; right: 2px; bottom: 2px; width: 9px; height: 9px; border-radius: 50%; background: var(--ok); border: 2px solid var(--surface); }
.pq.cur { outline: 2.5px solid var(--brand); outline-offset: 2px; }
.sw { width: 22px; height: 22px; display: inline-grid; place-items: center; font-size: 11px; font-weight: 700; position: relative; flex: none; }
.cbt-foot { display: flex; gap: 8px; padding: 10px 16px; border-top: 1px solid var(--line); background: var(--surface); flex-wrap: wrap; }
.pal-toggle { display: none; }
@media (max-width: 860px) {
  .cbt-body { grid-template-columns: minmax(0, 1fr); }
  .cbt-top .ttl { font-size: 13px; }
  .cbt { overflow: hidden; }
  .cbt-pal { position: absolute; right: 0; top: 0; bottom: 0; width: min(320px, 86vw); z-index: 60; transform: translateX(100%); visibility: hidden; transition: transform .2s, visibility .2s; box-shadow: var(--shadow); }
  .cbt-pal.open { transform: none; visibility: visible; }
  .pal-toggle { display: inline-flex; }
  .cbt-q { padding: 14px 16px 24px; }
  .cbt-foot .btn { padding: 9px 10px; font-size: 13px; }
}

/* modal */
.modal-bg { position: fixed; inset: 0; background: rgb(10 12 25 / .55); z-index: 100; display: grid; place-items: center; padding: 16px; }
.modal { background: var(--surface); border-radius: 18px; padding: 22px; width: min(560px, 100%); max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow); }

/* results */
.score-hero { display: grid; grid-template-columns: auto 1fr; gap: 26px; align-items: center; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
.kpi { background: var(--surface-2); border-radius: 12px; padding: 12px 14px; }
.kpi b { display: block; font: 800 22px var(--f-display); font-variant-numeric: tabular-nums; } .kpi span { font-size: 12px; color: var(--ink-2); font-weight: 600; }
@media (max-width: 640px) { .score-hero { grid-template-columns: 1fr; justify-items: center; } }
.bar { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.bar i { display: block; height: 100%; border-radius: 99px; background: var(--accent); }
.topic-row { display: grid; grid-template-columns: 1fr 120px 48px; gap: 12px; align-items: center; padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.sol { padding: 18px; }
.sol + .sol { margin-top: 12px; }
.exp { margin-top: 14px; padding: 12px 14px; background: var(--accent-soft); border-radius: 10px; font-size: 14px; }
.exp b { color: var(--accent); }
.empty { text-align: center; padding: 40px 16px; color: var(--ink-2); }
.empty .big { font-size: 44px; }

/* drill */
.drill { max-width: 760px; margin: 0 auto; padding: 24px 0; }
.drill-stats { display: flex; gap: 10px; flex-wrap: wrap; }

/* pass */
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.plan { padding: 24px; border-radius: 18px; border: 1.5px solid var(--line); background: var(--surface); }
.plan.hot { border-color: var(--brand); position: relative; }
.plan .price { font: 800 38px var(--f-display); margin: 8px 0; }
.plan .price small { font-size: 15px; color: var(--ink-3); font-weight: 600; }

input.field, select.field { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1.5px solid var(--line); background: var(--surface); }
input.field:focus, select.field:focus { outline: none; border-color: var(--brand); }
.footer { margin-top: 50px; padding: 26px 0 40px; border-top: 1px solid var(--line); color: var(--ink-3); font-size: 13px; }
:focus-visible { outline: 2.5px solid var(--brand); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

/* Nursing courses */
.week { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); margin-top: 12px; padding: 4px 14px 14px; }
.week > summary { cursor: pointer; display: flex; flex-wrap: wrap; gap: 4px 12px; align-items: baseline; padding: 12px 0; list-style: none; }
.week > summary::-webkit-details-marker { display: none; }
.week > summary::before { content: '▸'; color: var(--ink-3); }
.week[open] > summary::before { content: '▾'; }
.week .test-row { box-shadow: none; }
.lesson-body h3 { margin: 18px 0 6px; }
.lesson-body h3:first-child { margin-top: 0; }
.lesson-body p, .lesson-body ul, .lesson-body ol { margin: 8px 0; line-height: 1.65; }
.lesson-body ul, .lesson-body ol { padding-left: 22px; }
.lesson-body li + li { margin-top: 4px; }