/* PassEveryTest — light by default, dark on request. One typeface (Overpass, drawn after
   highway signage); the guide-sign plate is the only loud element. */
@font-face { font-family: 'Overpass'; font-style: normal; font-display: swap; font-weight: 100 900; src: url(/assets/fonts/overpass-latin-wght-normal.woff2) format('woff2'); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: 'Overpass'; font-style: normal; font-display: swap; font-weight: 100 900; src: url(/assets/fonts/overpass-latin-ext-wght-normal.woff2) format('woff2'); unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }

:root {
  --bg: #ffffff;
  --surface: #f3f5f7;
  --surface-2: #e8ecf0;
  --line: #dde3e9;
  --line-strong: #c3ccd5;
  --ink: #15202b;
  --ink-2: #47535f;
  --ink-3: #69757f;
  --blue: #1a4fd6;
  --blue-hover: #143fae;
  --blue-ink: #ffffff;
  --blue-soft: #e9effd;
  --plate: #00663f;
  --plate-ink: #ffffff;
  --correct: #0a7a3d;
  --correct-soft: #e6f4eb;
  --wrong: #c4261d;
  --wrong-soft: #fcebe9;
  --amber: #f5b800;
  --asphalt: #2b333c;
  --lane: #e3e8ed;
  --radius: 12px;
  --font: 'Overpass', system-ui, -apple-system, 'Segoe UI', 'Noto Sans', 'Noto Sans Arabic', 'Noto Sans Gurmukhi', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0f1419;
  --surface: #171f27;
  --surface-2: #1f2933;
  --line: #2a3541;
  --line-strong: #3b4855;
  --ink: #e8edf2;
  --ink-2: #b3bec8;
  --ink-3: #8a96a2;
  --blue: #86a8ff;
  --blue-hover: #a8c0ff;
  --blue-ink: #0b1220;
  --blue-soft: #1a2541;
  --plate: #0c7a4c;
  --correct: #52c88f;
  --correct-soft: #11281d;
  --wrong: #ff8a80;
  --wrong-soft: #2e1715;
  --asphalt: #0a0e12;
  --lane: #26313c;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); font-size: 17px; line-height: 1.6; font-feature-settings: 'kern'; text-rendering: optimizeLegibility; }
@media (min-width: 900px) { body { font-size: 18px; } }
img, svg { max-width: 100%; }
a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--blue-hover); }
h1, h2, h3 { line-height: 1.15; margin: 0 0 0.5em; font-weight: 780; letter-spacing: -0.012em; }
h1 { font-size: clamp(2rem, 4.4vw, 3.15rem); font-weight: 820; letter-spacing: -0.022em; line-height: 1.06; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.12rem; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 12px; top: -60px; background: var(--blue); color: var(--blue-ink); padding: 10px 14px; border-radius: 8px; z-index: 50; font-weight: 700; }
.skip:focus { top: 12px; }
.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }
.muted { color: var(--ink-2); }
.small { font-size: 0.86em; }
.ic { width: 1.15em; height: 1.15em; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; flex: none; vertical-align: -0.2em; }
.text-link { font-weight: 650; }

/* ---------- Header ---------- */
.top { border-bottom: 1px solid var(--line); background: var(--bg); }
.top-in { display: flex; align-items: center; gap: 28px; min-height: 66px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.brand:hover { color: var(--ink); }
.mark { width: 30px; height: 30px; flex: none; }
.mark rect:first-child { fill: var(--blue); }
.mark .mark-in { fill: none; stroke: var(--blue-ink); stroke-width: 1.4; opacity: 0.9; }
.mark .mark-tick { fill: none; stroke: var(--blue-ink); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.wordmark { font-size: 1.28rem; font-weight: 820; letter-spacing: -0.02em; white-space: nowrap; }
.wordmark b { font-weight: 360; }
.nav { display: flex; gap: 4px; margin-inline-end: auto; }
.nav a { color: var(--ink-2); text-decoration: none; padding: 8px 12px; border-radius: 8px; font-weight: 600; font-size: 0.95rem; white-space: nowrap; }
.nav a:hover { color: var(--ink); background: var(--surface); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--surface-2); }
.tools { display: flex; align-items: center; gap: 8px; }
.lang { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); border-radius: 10px; padding: 0 4px 0 10px; color: var(--ink-2); height: 40px; }
.lang:hover { border-color: var(--line-strong); }
.lang select { font: inherit; font-size: 0.92rem; color: var(--ink); background: transparent; border: 0; height: 38px; padding: 0 4px; cursor: pointer; max-width: 9.5em; }
.lang select option { background: var(--bg); color: var(--ink); }
.theme-btn { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--line); background: transparent; color: var(--ink-2); cursor: pointer; }
.theme-btn:hover { color: var(--ink); border-color: var(--line-strong); }
.theme-btn .ic { width: 20px; height: 20px; }
.theme-btn .i-sun, :root[data-theme="dark"] .theme-btn .i-moon { display: none; }
:root[data-theme="dark"] .theme-btn .i-sun { display: block; }
@media (max-width: 860px) {
  .top-in { flex-wrap: wrap; gap: 0 12px; padding-top: 10px; }
  .brand { margin-inline-end: auto; }
  .nav { order: 3; flex-basis: 100%; margin: 6px -20px 0; padding: 0 12px 8px; overflow-x: auto; scrollbar-width: none; }
  .nav::-webkit-scrollbar { display: none; }
  .lang select { max-width: 6.5em; }
}

/* ---------- Buttons and forms ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; font: inherit; font-weight: 750; font-size: 1rem; color: var(--blue-ink); background: var(--blue); border: 0; border-radius: 10px; padding: 0 22px; min-height: 50px; cursor: pointer; text-decoration: none; }
.btn:hover { background: var(--blue-hover); color: var(--blue-ink); }
.btn .ic { width: 20px; height: 20px; }
[dir="rtl"] .btn .ic, [dir="rtl"] .card .ic-arrow { transform: scaleX(-1); }
.btn-quiet { background: transparent; color: var(--ink); border: 1px solid var(--line-strong); }
.btn-quiet:hover { background: var(--surface); color: var(--ink); }
select, input[type="search"] { font: inherit; }

/* ---------- Hero ---------- */
.hero { padding: 56px 0 40px; border-bottom: 1px solid var(--line); }
.hero-in { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 56px; align-items: start; }
.hero h1 { max-width: 13em; }
.lead { font-size: 1.12em; color: var(--ink-2); max-width: 38em; }
.picker { background: var(--surface); border-radius: 16px; padding: 20px; margin-top: 28px; }
.picker-title { font-size: 1.05rem; margin-bottom: 12px; }
.picker-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-bottom: 14px; }
.picker label { display: grid; gap: 4px; font-size: 0.86rem; font-weight: 650; color: var(--ink-2); }
.picker select { height: 48px; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--bg); color: var(--ink); padding: 0 10px; width: 100%; }
.picker select:disabled { opacity: 0.55; }
.picker .btn { width: 100%; }
.hero-facts { margin: 14px 0 0; color: var(--ink-3); font-size: 0.92rem; font-variant-numeric: tabular-nums; }
.sample-label { font-size: 0.9rem; color: var(--ink-2); margin-bottom: 10px; font-weight: 600; }
@media (max-width: 960px) { .hero-in { grid-template-columns: 1fr; gap: 36px; } }
@media (max-width: 640px) { .hero { padding-top: 32px; } .picker-row { grid-template-columns: 1fr; } }

/* ---------- Sections ---------- */
.section { padding: 56px 20px 8px; }
.section-title { font-size: 1.7rem; margin-bottom: 22px; }
.block { margin: 44px 0; }
.block > h2 { margin-bottom: 16px; }

/* The guide-sign plate: green, white keyline, used for place names. */
.plate { display: inline-flex; flex-direction: column; gap: 2px; background: var(--plate); color: var(--plate-ink); border-radius: 12px; padding: 16px 26px 14px; box-shadow: inset 0 0 0 3px var(--plate), inset 0 0 0 5px var(--plate-ink); margin: 6px 0 18px; }
.plate-name { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 820; letter-spacing: -0.01em; line-height: 1.02; }
.plate-sub { font-size: 1rem; font-weight: 600; letter-spacing: 0.01em; opacity: 0.92; }

.countries { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 40px; }
.country { border-top: 1px solid var(--line); padding-top: 18px; }
.country h3 { font-size: 1.5rem; margin-bottom: 12px; }
.country h3 a { color: var(--ink); text-decoration: none; }
.country h3 a:hover { color: var(--blue); }
@media (max-width: 760px) { .countries { grid-template-columns: 1fr; } }
.chips { list-style: none; margin: 0 0 12px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.chips a { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink); border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px 4px 4px; font-size: 0.92rem; font-weight: 600; }
.chips a:hover { border-color: var(--blue); color: var(--blue); }
.chips abbr { text-decoration: none; background: var(--plate); color: var(--plate-ink); border-radius: 5px; font-size: 0.74rem; font-weight: 800; min-width: 2.3em; text-align: center; padding: 3px 5px 1px; letter-spacing: 0.02em; }
.chips-tests a { padding: 7px 12px; }
.chips-tests .ic { color: var(--blue); }

.kinds { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.kind-card { display: grid; grid-template-columns: auto 1fr auto; gap: 4px 14px; align-items: start; text-decoration: none; color: var(--ink); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; height: 100%; }
.kind-card:hover { border-color: var(--blue); color: var(--ink); }
.kind-card > .ic { width: 28px; height: 28px; color: var(--blue); grid-row: span 2; }
.kind-name { font-weight: 800; font-size: 1.15rem; }
.kind-lead { grid-column: 2 / 4; color: var(--ink-2); font-size: 0.95rem; line-height: 1.5; }
.kind-count { font-weight: 800; color: var(--ink-3); font-variant-numeric: tabular-nums; }
@media (max-width: 860px) { .kinds { grid-template-columns: 1fr; } }

.how-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; margin-bottom: 18px; }
.how-grid h3 { margin-bottom: 6px; }
.how-grid p { color: var(--ink-2); margin: 0; }
@media (max-width: 860px) { .how-grid { grid-template-columns: 1fr; gap: 18px; } }
.how { padding-bottom: 64px; }

/* ---------- Page heads, crumbs ---------- */
.crumbs ol { list-style: none; margin: 0; padding: 20px 0 0; display: flex; flex-wrap: wrap; gap: 4px; font-size: 0.88rem; color: var(--ink-3); }
.crumbs li + li::before { content: '›'; margin-inline-end: 4px; color: var(--ink-3); }
[dir="rtl"] .crumbs li + li::before { content: '‹'; }
.crumbs a { color: var(--ink-2); text-decoration: none; }
.crumbs a:hover { color: var(--blue); text-decoration: underline; }
.page-head { padding: 22px 0 10px; }
.page-head h1 { max-width: 20em; }
.kicker { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 0.92rem; color: var(--ink-2); margin-bottom: 10px; }
.kicker .ic { color: var(--blue); }

/* ---------- Cards ---------- */
.cards { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.card { display: flex; flex-direction: column; gap: 6px; height: 100%; text-decoration: none; color: var(--ink); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 18px 16px; }
.card:hover { border-color: var(--blue); color: var(--ink); }
.card-kind { display: inline-flex; align-items: center; gap: 7px; font-size: 0.84rem; font-weight: 700; color: var(--ink-2); }
.card-kind .ic { color: var(--blue); }
.card-title { font-size: 1.12rem; font-weight: 780; line-height: 1.25; }
.card-meta { font-size: 0.88rem; color: var(--ink-3); margin-top: auto; padding-top: 6px; }
.cards-tight { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }

.regions { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 8px; }
.regions a { display: grid; grid-template-columns: auto 1fr; gap: 0 12px; align-items: center; text-decoration: none; color: var(--ink); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.regions a:hover { border-color: var(--blue); }
.regions abbr { grid-row: span 2; text-decoration: none; background: var(--plate); color: var(--plate-ink); border-radius: 6px; font-weight: 800; font-size: 0.82rem; min-width: 2.6em; text-align: center; padding: 6px 6px 4px; }
.r-name { font-weight: 700; }
.r-tests { font-size: 0.82rem; color: var(--ink-3); }

/* ---------- Test layout ---------- */
.test-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 48px; align-items: start; padding-bottom: 64px; }
.test-side { position: sticky; top: 20px; display: grid; gap: 20px; }
@media (max-width: 980px) { .test-layout { grid-template-columns: 1fr; gap: 8px; } .test-side { position: static; } }
.glance { background: var(--surface); border-radius: var(--radius); padding: 18px 20px; }
.glance h2 { font-size: 1.05rem; margin-bottom: 10px; }
.glance dl { margin: 0 0 12px; }
.glance dl div { display: grid; grid-template-columns: 9.5em 1fr; gap: 12px; padding: 7px 0; border-top: 1px solid var(--line); font-size: 0.93rem; }
.glance dt { color: var(--ink-2); }
.glance dd { margin: 0; font-weight: 650; }
.glance-links { display: grid; gap: 6px; font-size: 0.93rem; margin-bottom: 8px; }
.sets h2 { font-size: 1.05rem; margin-bottom: 8px; }
.sets ol { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.sets li + li { border-top: 1px solid var(--line); }
.sets a { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; padding: 11px 16px; color: var(--ink); text-decoration: none; font-weight: 650; font-size: 0.95rem; }
.sets a small { color: var(--ink-3); font-weight: 500; }
.sets a:hover { background: var(--surface); }
.sets a[aria-current="page"] { background: var(--blue-soft); color: var(--blue); box-shadow: inset 3px 0 0 var(--blue); }
[dir="rtl"] .sets a[aria-current="page"] { box-shadow: inset -3px 0 0 var(--blue); }

/* ---------- Quiz ---------- */
.qlist { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.q { border: 1px solid var(--line); border-radius: 16px; padding: 22px 22px 18px; background: var(--bg); }
.q fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
.q-count { font-size: 0.84rem; font-weight: 700; color: var(--ink-3); margin: 0 0 6px; font-variant-numeric: tabular-nums; }
.q-text { font-size: 1.22rem; font-weight: 750; line-height: 1.35; padding: 0; margin-bottom: 16px; }
.q-sign { margin: 0 0 18px; display: flex; justify-content: center; padding: 18px; background: var(--surface); border-radius: 12px; }
.q-sign svg { width: 150px; height: 150px; }
.opts { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.opt { display: flex; align-items: flex-start; gap: 12px; padding: 12px 14px; border: 1px solid var(--line-strong); border-radius: 12px; cursor: pointer; line-height: 1.4; transition: border-color 0.12s, background-color 0.12s; }
.opt:hover { border-color: var(--blue); background: var(--blue-soft); }
.opt input { position: absolute; opacity: 0; pointer-events: none; }
.opt:has(input:focus-visible) { outline: 3px solid var(--blue); outline-offset: 2px; }
.key { flex: none; display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 7px; border: 1px solid var(--line-strong); font-weight: 800; font-size: 0.85rem; color: var(--ink-2); margin-top: -2px; }
.opt-text { padding-top: 1px; }
.opt.is-correct { border-color: var(--correct); background: var(--correct-soft); }
.opt.is-correct .key { background: var(--correct); border-color: var(--correct); color: #fff; }
.opt.is-wrong { border-color: var(--wrong); background: var(--wrong-soft); }
.opt.is-wrong .key { background: var(--wrong); border-color: var(--wrong); color: #fff; }
.q.is-done .opt { cursor: default; }
.q.is-done .opt:not(.is-correct):not(.is-wrong) { opacity: 0.62; }
.q.is-done .opt:hover:not(.is-correct):not(.is-wrong) { border-color: var(--line-strong); background: transparent; }
.ans { margin-top: 14px; font-size: 0.95rem; }
.ans summary { cursor: pointer; color: var(--blue); font-weight: 700; width: max-content; }
.ans p { margin: 8px 0 0; }
.why { color: var(--ink-2); }
.feedback { margin-top: 14px; padding: 12px 16px; border-radius: 10px; border-inline-start: 4px solid var(--correct); background: var(--correct-soft); }
.feedback.bad { border-color: var(--wrong); background: var(--wrong-soft); }
.feedback strong { display: block; margin-bottom: 2px; }
.feedback p { margin: 0; color: var(--ink-2); }
.q-actions { display: flex; justify-content: flex-end; margin-top: 16px; }

/* JS mode: one question at a time with a road for a progress bar. */
.quiz.is-live .q { display: none; }
.quiz.is-live .q.is-current { display: block; }
.quiz.is-live .ans { display: none; }
.quiz.is-live .q-count { display: none; }
.quiz-bar { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.quiz-bar[hidden] { display: none; }
.road { flex: 1; height: 14px; border-radius: 7px; background: var(--lane) repeating-linear-gradient(90deg, transparent 0 10px, rgba(255, 255, 255, 0.9) 10px 22px) center / 100% 2px no-repeat; position: relative; overflow: hidden; }
:root[data-theme="dark"] .road { background: var(--lane) repeating-linear-gradient(90deg, transparent 0 10px, rgba(255, 255, 255, 0.18) 10px 22px) center / 100% 2px no-repeat; }
.road-fill { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--asphalt) repeating-linear-gradient(90deg, transparent 0 10px, var(--amber) 10px 22px) center / 100% 2px no-repeat; border-radius: 7px; transition: width 0.3s ease; }
[dir="rtl"] .road-fill { inset: 0 0 0 auto; }
.quiz-pos { font-weight: 750; font-size: 0.92rem; color: var(--ink-2); font-variant-numeric: tabular-nums; white-space: nowrap; }
.key-hint { margin-top: 12px; }
@media (hover: none) { .key-hint { display: none; } }
.pass-rule { color: var(--ink-2); font-size: 0.93rem; margin-top: 10px; }
.quiz-sample .q { box-shadow: 0 1px 0 var(--line), 0 18px 40px -28px rgba(20, 32, 43, 0.35); }

.quiz-result { border: 1px solid var(--line); border-radius: 16px; padding: 26px; }
.result-head { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-bottom: 14px; }
.result-score { font-size: 3rem; font-weight: 850; line-height: 1; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.result-badge { display: inline-flex; align-items: center; gap: 6px; font-weight: 800; padding: 6px 12px; border-radius: 8px; background: var(--correct-soft); color: var(--correct); }
.result-badge.bad { background: var(--wrong-soft); color: var(--wrong); }
.result-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 8px; }
.review { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 10px; }
.review li { border-top: 1px solid var(--line); padding-top: 10px; font-size: 0.95rem; }
.review .rq { font-weight: 700; margin-bottom: 4px; }
.review .ra { color: var(--wrong); }
.review .rc { color: var(--correct); }
.resume { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; background: var(--blue-soft); border-radius: 10px; padding: 10px 14px; margin-bottom: 14px; font-weight: 600; }

/* Mock exam */
.mock-start { border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.mock-facts { list-style: none; margin: 0 0 20px; padding: 0; display: grid; gap: 8px; font-weight: 650; }
.mock-facts .ic { color: var(--correct); margin-inline-end: 8px; }
.timer { font-weight: 800; font-variant-numeric: tabular-nums; display: inline-flex; align-items: center; gap: 6px; color: var(--ink-2); }
.timer.is-low { color: var(--wrong); }

/* ---------- Info blocks ---------- */
.facts { margin: 0; padding-inline-start: 1.2em; display: grid; gap: 8px; }
.facts li::marker { color: var(--plate); }
.faq details { border-top: 1px solid var(--line); padding: 14px 0; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 720; list-style-position: outside; }
.faq p { margin: 10px 0 0; color: var(--ink-2); }
.sources ul { margin: 0; padding-inline-start: 1.2em; font-size: 0.93rem; display: grid; gap: 4px; }

.filter { display: flex; align-items: center; gap: 10px; border: 1px solid var(--line-strong); border-radius: 12px; padding: 0 14px; max-width: 560px; margin-top: 8px; color: var(--ink-3); }
.filter input { border: 0; background: transparent; color: var(--ink); height: 52px; width: 100%; font-size: 1rem; }
.filter input:focus { outline: none; }
.filter:focus-within { outline: 3px solid var(--blue); outline-offset: 2px; }
.all-list { list-style: none; margin: 0; padding: 0; columns: 2 280px; column-gap: 32px; }
.all-list li { break-inside: avoid; }
.all-list a { display: flex; flex-direction: column; padding: 8px 0; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--ink); }
.all-list a span { font-weight: 680; }
.all-list a small { color: var(--ink-3); }
.all-list a:hover span { color: var(--blue); }
.centre-list { list-style: none; margin: 0; padding: 0; columns: 3 220px; column-gap: 24px; }
.centre-list a { display: flex; align-items: center; gap: 8px; padding: 6px 0; text-decoration: none; color: var(--ink); break-inside: avoid; }
.centre-list .ic { color: var(--plate); }
.centre-list small { color: var(--ink-3); margin-inline-start: auto; }
.centre-facts div { display: grid; grid-template-columns: 12em 1fr; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.centre-facts dt { color: var(--ink-2); }
.centre-facts dd { margin: 0; font-weight: 650; }
.prose { max-width: 40em; padding-bottom: 64px; }

/* ---------- Footer ---------- */
.foot { background: var(--surface); margin-top: 24px; border-top: 1px solid var(--line); }
.foot-in { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 32px; padding-top: 44px; padding-bottom: 28px; }
.foot h2 { font-size: 0.95rem; margin-bottom: 10px; }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: 0.93rem; }
.foot a { color: var(--ink-2); text-decoration: none; }
.foot a:hover { color: var(--blue); text-decoration: underline; }
.foot-brand p { color: var(--ink-2); font-size: 0.93rem; max-width: 26em; margin-top: 12px; }
.foot-langs { grid-template-columns: 1fr 1fr; }
.foot-langs [aria-current] { font-weight: 750; color: var(--ink); }
.foot-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding-top: 16px; padding-bottom: 28px; border-top: 1px solid var(--line); font-size: 0.86rem; color: var(--ink-3); }
@media (max-width: 900px) { .foot-in { grid-template-columns: 1fr 1fr; } .foot-brand { grid-column: 1 / -1; } }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }
@media print { .top, .foot, .test-side, .ans summary { display: none; } .ans { display: block !important; } .ans p { display: block; } }
.opt.is-chosen { border-color: var(--blue); background: var(--blue-soft); }
.opt.is-chosen .key { background: var(--blue); border-color: var(--blue); color: var(--blue-ink); }

/* ---------- Study guides ---------- */
.read-first { display: flex; align-items: center; gap: 14px; margin: 0 0 22px; padding: 16px 18px; border-radius: 14px; background: var(--blue-soft); color: var(--ink); text-decoration: none; border: 1px solid transparent; }
.read-first:hover { border-color: var(--blue); color: var(--ink); }
.read-first > .ic:first-child { width: 30px; height: 30px; color: var(--blue); }
.read-first > span { display: grid; gap: 2px; flex: 1; }
.read-first strong { font-size: 1.02rem; }
.read-first span span { color: var(--ink-2); font-size: 0.95rem; line-height: 1.45; }
.read-first .ic-arrow { color: var(--blue); }
[dir="rtl"] .read-first .ic-arrow { transform: scaleX(-1); }
.guide-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.guide-links a { display: flex; gap: 10px; align-items: flex-start; padding: 8px 2px; color: var(--ink); text-decoration: none; font-weight: 650; font-size: 0.95rem; line-height: 1.35; }
.guide-links a:hover { color: var(--blue); }
.guide-links .ic { color: var(--blue); margin-top: 1px; }
.sets h2 + .guide-links, .sets ol + h2 { margin-top: 22px; }
.card-guide .card-kind .ic { color: var(--plate); }

.guide-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 56px; align-items: start; padding-bottom: 64px; }
.guide-side { position: sticky; top: 20px; max-height: calc(100vh - 40px); overflow: auto; }
.toc h2 { font-size: 1rem; margin-bottom: 8px; }
.toc ol { margin: 0; padding: 0; list-style: none; counter-reset: toc; display: grid; gap: 2px; border-inline-start: 2px solid var(--line); }
.toc li { counter-increment: toc; }
.toc a { display: block; padding: 5px 12px; color: var(--ink-2); text-decoration: none; font-size: 0.92rem; line-height: 1.35; margin-inline-start: -2px; border-inline-start: 2px solid transparent; }
.toc a:hover { color: var(--blue); border-color: var(--blue); }
.guide { max-width: 46em; }
.chapter { padding-top: 8px; margin-bottom: 40px; scroll-margin-top: 16px; }
.chapter h2 { font-size: 1.6rem; padding-top: 18px; border-top: 1px solid var(--line); margin-bottom: 16px; }
.chapter:first-child h2 { border-top: 0; padding-top: 0; }
.chapter h3 { font-size: 1.18rem; margin: 26px 0 10px; }
.chapter p, .chapter li { line-height: 1.7; }
.chapter ul, .chapter ol { padding-inline-start: 1.3em; margin: 0 0 1em; display: grid; gap: 6px; }
.chapter ul li::marker { color: var(--plate); }
.tip { margin: 18px 0; padding: 14px 18px; border-radius: 12px; background: var(--surface); border-inline-start: 4px solid var(--amber); line-height: 1.6; }
.tip strong { margin-inline-end: 4px; }
.table-wrap { overflow-x: auto; margin: 16px 0 22px; border: 1px solid var(--line); border-radius: 12px; }
.table-wrap table { width: 100%; border-collapse: collapse; font-size: 0.94rem; }
.table-wrap th, .table-wrap td { text-align: start; padding: 10px 14px; border-top: 1px solid var(--line); vertical-align: top; line-height: 1.45; }
.table-wrap thead th { border-top: 0; background: var(--surface); font-weight: 750; white-space: nowrap; }
.table-wrap tbody th { font-weight: 700; }
.diagram { margin: 22px 0 26px; }
.diagram > svg { display: block; width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--line); }
.diagram figcaption { margin-top: 10px; font-size: 0.94rem; color: var(--ink-2); }
.diagram figcaption p { margin: 0 0 6px; }
.legend { margin: 0; padding-inline-start: 1.6em; display: grid; gap: 3px; }
.legend li::marker { font-weight: 800; color: var(--ink); }
.sign-one { display: flex; align-items: center; gap: 18px; margin: 18px 0; }
.sign-one svg { width: 96px; height: 96px; flex: none; }
.sign-grid { list-style: none; margin: 16px 0 24px; padding: 0 !important; display: grid !important; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); gap: 12px !important; }
.sign-grid figure { margin: 0; height: 100%; display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; padding: 14px 10px 12px; border: 1px solid var(--line); border-radius: 12px; }
.sign-grid svg { width: 84px; height: 84px; }
.sign-grid figcaption { font-size: 0.86rem; line-height: 1.35; color: var(--ink-2); }
.practise { margin: 48px 0 8px; padding-top: 24px; border-top: 1px solid var(--line); }
.q-fig { margin: 0 0 18px; }
.q-fig svg { display: block; width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--line); }
.q-sign + .q-fig { margin-top: -6px; }
:root[data-theme="dark"] .q-sign { background: #e9edf1; }
:root[data-theme="dark"] .sign-grid figure, :root[data-theme="dark"] .sign-one svg { background: #e9edf1; }
:root[data-theme="dark"] .sign-grid figcaption { color: #3b4652; }
.sample-more { margin: 12px 0 0; font-size: 0.92rem; font-weight: 650; }
@media (max-width: 980px) { .guide-layout { grid-template-columns: 1fr; gap: 8px; } .guide-side { position: static; max-height: none; } .toc { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin-bottom: 18px; } }
.guide-meta { display: flex; flex-wrap: wrap; gap: 4px 18px; }