:root {
  color-scheme: dark;
  --ink: #f4f7ff;
  --muted: #9eb0ce;
  --bg: #081226;
  --panel: #0d1a34;
  --panel-2: #122342;
  --line: #263957;
  --accent: #2ce0cf;
  --accent-soft: rgba(44, 224, 207, .12);
  --warning: #ffd166;
  --danger: #ff9ba7;
  --success: #65e6a8;
  --shell: 1180px;
  --radius: 22px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.5; }
body.dialog-open { overflow: hidden; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }
.shell { width: min(var(--shell), calc(100% - 40px)); margin: 0 auto; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 40; transform: translateY(-150%); padding: 10px 14px; background: var(--ink); color: var(--bg); }
.skip-link:focus { transform: translateY(0); }

.topbar { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); background: rgba(8, 18, 38, .96); backdrop-filter: blur(16px); }
.topbar-inner { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 850; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 34px; aspect-ratio: 1; background: var(--accent); color: var(--bg); font-size: 14px; font-weight: 950; }
.topbar nav { margin-left: auto; display: flex; gap: 24px; }
.topbar nav a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 700; }
.topbar nav a:hover, .topbar nav a:focus-visible { color: var(--ink); }
.topbar nav a[aria-current="location"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--accent); }
.account-pill { padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .03em; }

#practiceRooms, #accessPlans, #aiTutor, #researchNotes { scroll-margin-top: 88px; }

.practice-hero { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(290px, .75fr); gap: 70px; align-items: center; padding-block: 92px 76px; }
.eyebrow { margin: 0 0 14px; color: var(--accent); font-size: 12px; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
.practice-hero h1 { margin: 0; max-width: 800px; font-size: clamp(52px, 7vw, 92px); line-height: .92; letter-spacing: -.065em; }
.hero-copy { max-width: 720px; margin: 28px 0; color: var(--muted); font-size: clamp(17px, 2vw, 21px); }
.official-facts { display: flex; flex-wrap: wrap; gap: 10px; }
.official-facts span { padding: 10px 14px; border: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.official-facts b { color: var(--ink); }
.gate-card { border: 1px solid var(--line); border-top: 4px solid var(--accent); background: var(--panel); padding: 28px; box-shadow: 18px 18px 0 rgba(0, 0, 0, .18); }
.gate-label { display: block; margin-bottom: 20px; color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.gate-card > div { display: grid; grid-template-columns: 84px 1fr; align-items: baseline; gap: 12px; padding: 17px 0; border-top: 1px solid var(--line); }
.gate-card strong { font-size: 25px; }
.gate-card p { margin: 0; color: var(--muted); }
.gate-card small { display: block; margin-top: 16px; color: #7f91af; }

.research-strip { border-block: 1px solid var(--line); background: #0a1730; }
.research-strip .shell { min-height: 118px; display: grid; grid-template-columns: .8fr 1.6fr auto; gap: 40px; align-items: center; }
.research-strip span { display: block; margin-bottom: 5px; color: var(--accent); font-size: 11px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.research-strip b { font-size: 15px; }
.research-strip p { color: var(--muted); font-size: 14px; }
.research-strip a { color: var(--ink); font-size: 14px; font-weight: 800; white-space: nowrap; }

.section { padding-block: 92px; }
.section-heading { display: grid; grid-template-columns: 1.5fr .7fr; gap: 50px; align-items: end; margin-bottom: 36px; }
.section-heading h2 { margin: 0; max-width: 750px; font-size: clamp(34px, 4.3vw, 58px); line-height: 1.02; letter-spacing: -.045em; }
.section-heading > p { margin: 0; color: var(--muted); }
.pool-summary { display: grid; grid-template-columns: repeat(4, 1fr); margin-bottom: 64px; border: 1px solid var(--line); background: var(--panel); }
.pool-summary div { padding: 22px; border-right: 1px solid var(--line); }
.pool-summary div:last-child { border-right: 0; }
.pool-summary strong { display: block; color: var(--accent); font-size: 30px; line-height: 1; }
.pool-summary span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
.part-heading { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin: 50px 0 22px; }
.part-heading > div { display: flex; align-items: center; gap: 18px; }
.part-heading > div > span { display: grid; place-items: center; width: 58px; aspect-ratio: 1; border: 1px solid rgba(44, 224, 207, .55); border-radius: 50%; color: var(--accent); font-weight: 950; }
.part-heading small { color: var(--muted); font-size: 11px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.part-heading h3 { margin: 2px 0 0; font-size: 28px; letter-spacing: -.03em; }
.part-heading > b { padding: 7px 10px; border: 1px solid rgba(44, 224, 207, .45); color: var(--accent); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.part-heading.second-part { margin-top: 76px; }
.part-heading > b.beta-badge, .inline-beta { border-color: rgba(255, 209, 102, .58); color: var(--warning); }
.inline-beta { display: inline-flex; margin-right: 7px; padding: 2px 6px; border: 1px solid; font-size: 10px; font-weight: 950; letter-spacing: .1em; text-transform: uppercase; }
.beta-notice { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: start; margin: 0 0 20px; padding: 18px 20px; border: 1px solid rgba(255, 209, 102, .42); background: rgba(255, 209, 102, .07); }
.beta-notice strong { color: var(--warning); white-space: nowrap; }
.beta-notice p { margin: 0; color: var(--muted); font-size: 14px; }
.access-summary { display: flex; flex-wrap: wrap; gap: 10px; min-height: 42px; margin-bottom: 18px; }
.access-summary span { padding: 8px 11px; border: 1px solid var(--line); color: var(--muted); font-size: 12px; font-weight: 750; }
.access-summary span.available { border-color: rgba(44, 224, 207, .45); color: var(--accent); }
.access-summary span.used { color: #7c8ca7; text-decoration: line-through; }
.access-summary button { padding: 8px 12px; border: 1px solid var(--accent); background: var(--accent-soft); color: var(--accent); font-size: 12px; font-weight: 850; }
.room-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.practice-room { min-height: 255px; display: flex; flex-direction: column; padding: 24px; border: 1px solid var(--line); background: var(--panel); }
.practice-room.beta-room { border-top-color: rgba(255, 209, 102, .5); }
.practice-room .room-code { display: grid; place-items: center; width: 48px; aspect-ratio: 1; margin-bottom: auto; border: 1px solid rgba(44, 224, 207, .5); color: var(--accent); font-weight: 900; }
.practice-room h3 { margin: 22px 0 4px; font-size: 23px; letter-spacing: -.025em; }
.practice-room p { margin: 0 0 20px; color: var(--muted); font-size: 14px; }
.practice-room button, .primary { min-height: 48px; padding: 0 18px; border: 1px solid var(--accent); background: var(--accent); color: var(--bg); font-weight: 900; }
.practice-room button:hover, .practice-room button:focus-visible, .primary:hover, .primary:focus-visible { background: #7bf4e8; }
.practice-room.is-used { opacity: .66; }
.practice-room.is-used button { border-color: var(--line); background: transparent; color: var(--muted); }
.full-room { grid-column: 1 / -1; min-height: auto; display: grid; grid-template-columns: 70px 1fr auto; align-items: center; column-gap: 24px; }
.full-room .room-code { grid-row: 1; margin: 0; width: 64px; font-size: 22px; }
.full-room div { grid-column: 2; }
.full-room div small { color: var(--accent); font-weight: 850; text-transform: uppercase; letter-spacing: .12em; }
.full-room h3 { margin-top: 3px; }
.full-room button { grid-column: 3; grid-row: 1; min-width: 205px; }
.demo-room { border-color: rgba(44, 224, 207, .68); background: linear-gradient(105deg, rgba(44, 224, 207, .1), var(--panel) 58%); }
.demo-room .room-code { background: var(--accent); color: var(--bg); }
.bundle-room { border-left: 4px solid var(--line); }
.bundle-room.is-bundle-locked { opacity: 1; background: #09162c; }
.bundle-room.is-bundle-locked .room-code { border-color: var(--line); color: var(--muted); }
.bundle-room.is-bundle-locked button { border-color: var(--accent); color: var(--accent); }
.preview-reset { margin-top: 22px; padding: 9px 0; border: 0; border-bottom: 1px solid var(--muted); background: transparent; color: var(--muted); font-size: 12px; }

.session-config { margin-top: 34px; padding: clamp(24px, 4vw, 42px); border: 1px solid var(--line); border-top: 4px solid var(--accent); background: var(--panel); }
.config-copy { max-width: 720px; }
.config-copy h3 { margin: 0; font-size: clamp(28px, 4vw, 42px); letter-spacing: -.04em; }
.config-copy > p:last-child { color: var(--muted); }
.config-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 30px; }
.config-grid > label, .config-grid fieldset { min-width: 0; margin: 0; padding: 20px; border: 1px solid var(--line); background: #09162c; }
.config-grid > label > span, .config-grid legend { color: var(--ink); font-size: 13px; font-weight: 850; }
.config-grid select { width: 100%; min-height: 48px; margin-top: 10px; padding-inline: 12px; border: 1px solid var(--line); background: var(--panel-2); color: var(--ink); }
.config-grid small { display: block; margin-top: 9px; color: var(--muted); font-size: 12px; }
.config-grid fieldset { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.config-grid fieldset legend { padding-inline: 5px; }
.config-grid fieldset label { position: relative; display: flex; gap: 10px; padding: 12px; border: 1px solid var(--line); cursor: pointer; }
.config-grid fieldset label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.config-grid fieldset input { margin-top: 4px; accent-color: var(--accent); }
.config-grid fieldset b { display: block; font-size: 13px; }
.config-grid fieldset small { margin-top: 2px; }
.config-actions { display: flex; justify-content: flex-end; gap: 12px; margin-top: 26px; }
.config-actions button { min-height: 48px; padding: 0 18px; border: 1px solid var(--line); background: transparent; color: var(--ink); font-weight: 850; }
.config-actions .primary { border-color: var(--accent); background: var(--accent); color: var(--bg); }

.dashboard-section { padding-block: 50px 100px; }
.recommendation-card { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 28px; border: 1px solid rgba(44, 224, 207, .48); background: linear-gradient(110deg, var(--accent-soft), var(--panel)); }
.recommendation-card span { color: var(--accent); font-size: 11px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.recommendation-card h3 { margin: 4px 0; font-size: 29px; }
.recommendation-card p { margin: 0; color: var(--muted); }
.recommendation-card button { flex: 0 0 auto; min-height: 48px; padding-inline: 18px; border: 1px solid var(--accent); background: var(--accent); color: var(--bg); font-weight: 900; }
.dashboard-metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-block: 18px; }
.dashboard-metrics article { padding: 20px; border: 1px solid var(--line); background: var(--panel); }
.dashboard-metrics span { display: block; color: var(--muted); font-size: 12px; }
.dashboard-metrics strong { display: block; margin-top: 10px; font-size: 31px; }
.skill-progress { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.skill-progress article { padding: 18px 20px; border: 1px solid var(--line); background: var(--panel); }
.skill-progress article > div:first-child { display: flex; justify-content: space-between; gap: 16px; }
.skill-progress article b { color: var(--accent); }
.skill-progress small { display: block; margin-top: 9px; color: var(--muted); }
.skill-bar { height: 4px; margin-top: 14px; background: var(--line); }
.skill-bar span { display: block; height: 100%; background: var(--accent); }
.dashboard-actions { display: flex; gap: 10px; margin-top: 18px; }
.dashboard-actions button { min-height: 44px; padding-inline: 16px; border: 1px solid var(--line); background: transparent; color: var(--ink); font-weight: 800; }
.dashboard-actions button:disabled { opacity: .38; cursor: not-allowed; }
.tutor-card, .result-tutor { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 22px 34px; margin-top: 42px; padding: clamp(24px, 4vw, 38px); border: 1px solid rgba(44, 224, 207, .5); border-left: 5px solid var(--accent); background: linear-gradient(115deg, var(--accent-soft), var(--panel) 56%); }
.tutor-intro > span, .result-tutor > div:first-child > span { color: var(--accent); font-size: 11px; font-weight: 950; letter-spacing: .12em; text-transform: uppercase; }
.tutor-card h3, .result-tutor h3 { max-width: 680px; margin: 6px 0; font-size: clamp(25px, 3vw, 36px); letter-spacing: -.035em; }
.tutor-card p, .result-tutor p { max-width: 720px; margin: 0; color: var(--muted); }
.tutor-actions { display: flex; flex-wrap: wrap; align-content: center; justify-content: flex-end; gap: 9px; }
.tutor-actions button { min-height: 46px; padding-inline: 16px; border: 1px solid var(--accent); background: transparent; color: var(--accent); font-weight: 850; white-space: nowrap; }
.tutor-actions button:first-child { background: var(--accent); color: var(--bg); }
.tutor-actions button:disabled { opacity: .55; cursor: wait; }
.tutor-response { grid-column: 1 / -1; padding-top: 22px; border-top: 1px solid var(--line); }
.tutor-response.loading { min-height: 88px; background: linear-gradient(90deg, transparent, rgba(44, 224, 207, .08), transparent); background-size: 200% 100%; animation: tutor-loading 1.3s linear infinite; }
.tutor-response span { color: var(--accent); font-size: 11px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.tutor-response h4 { margin: 5px 0 10px; font-size: 22px; }
.tutor-response p { margin: 0; color: var(--ink); }
.tutor-response ul { display: grid; gap: 6px; margin: 14px 0; padding-left: 20px; color: var(--muted); }
.tutor-response small { color: var(--muted); }
.tutor-response .tutor-explanation { max-width: 78ch; margin: 0; color: var(--ink); font-size: 16px; line-height: 1.72; white-space: pre-line; }
@keyframes tutor-loading { to { background-position: -200% 0; } }
.history-panel { margin-top: 44px; padding-top: 28px; border-top: 1px solid var(--line); }
.history-panel h3 { font-size: 24px; }
#historyList { display: grid; gap: 8px; }
#historyList article { display: grid; grid-template-columns: 1fr auto; gap: 3px 20px; align-items: center; padding: 15px 18px; border: 1px solid var(--line); }
#historyList article div { display: flex; gap: 12px; }
#historyList article span, #historyList article small, .empty-state { color: var(--muted); font-size: 12px; }
#historyList article small { grid-column: 1 / -1; }

.session-shell { min-height: calc(100vh - 72px); background: #071020; }
.session-topbar { min-height: 88px; display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.session-topbar > div:first-child { display: grid; gap: 4px; }
.session-topbar span { color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.session-topbar b { font-size: 18px; }
.session-metrics { display: flex; align-items: center; gap: 20px; }
.session-metrics time { min-width: 78px; color: var(--warning); font-size: 24px; font-variant-numeric: tabular-nums; font-weight: 900; }
.session-metrics button { border: 0; background: transparent; color: var(--muted); text-decoration: underline; }
.session-progress { height: 3px; background: var(--line); }
.session-progress span { display: block; width: 0; height: 100%; background: var(--accent); transition: width .2s ease; }
.session-layout { display: grid; grid-template-columns: 170px minmax(0, 1fr) 230px; gap: 24px; align-items: start; padding-block: 42px 80px; }
.question-map { display: grid; grid-template-columns: repeat(5, 1fr); gap: 7px; position: sticky; top: 112px; }
.question-map button { width: 29px; aspect-ratio: 1; padding: 0; border: 1px solid var(--line); background: var(--panel); color: var(--muted); font-size: 12px; font-weight: 800; }
.question-map button.current { border-color: var(--accent); color: var(--accent); }
.question-map button.answered { background: var(--accent-soft); color: var(--ink); }
.question-card { min-height: 620px; padding: clamp(26px, 4vw, 48px); border: 1px solid var(--line); background: var(--panel); }
.favourite-button { display: block; margin: 18px 0 -6px auto; padding: 6px 0; border: 0; background: transparent; color: var(--muted); font-size: 12px; font-weight: 800; }
.question-type { display: flex; justify-content: space-between; gap: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.question-type span { color: var(--accent); font-size: 12px; font-weight: 900; text-transform: uppercase; letter-spacing: .12em; }
.question-type small { color: var(--muted); text-align: right; }
.question-context { margin-top: 28px; padding: 22px; border-left: 3px solid var(--accent); background: #09162c; color: #dce6f8; white-space: pre-line; }
.question-context.visual-pattern { border: 1px solid var(--line); border-left: 3px solid var(--accent); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: clamp(20px, 4vw, 34px); letter-spacing: .1em; text-align: center; }
.question-card h2 { margin: 30px 0 22px; font-size: clamp(24px, 3vw, 36px); line-height: 1.18; letter-spacing: -.025em; }
.answer-list { display: grid; gap: 10px; }
.answer-option { position: relative; display: grid; grid-template-columns: 42px 1fr; align-items: center; gap: 14px; min-height: 64px; padding: 10px 16px 10px 10px; border: 1px solid var(--line); background: #0a1730; cursor: pointer; }
.answer-option:hover { border-color: #48658f; }
.answer-option input { position: absolute; opacity: 0; }
.answer-option i { display: grid; place-items: center; width: 40px; aspect-ratio: 1; border: 1px solid var(--line); color: var(--muted); font-style: normal; font-weight: 900; }
.answer-option:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.answer-option:has(input:checked) i { background: var(--accent); color: var(--bg); }
.answer-option.is-correct { border-color: var(--success); }
.answer-option.is-wrong { border-color: var(--danger); }
.essay-workspace { display: grid; gap: 10px; }
.essay-workspace > label { font-size: 13px; font-weight: 850; }
.essay-workspace textarea { width: 100%; min-height: 320px; resize: vertical; padding: 18px; border: 1px solid var(--line); background: #071020; color: var(--ink); line-height: 1.6; }
.essay-workspace > div { display: flex; justify-content: space-between; color: var(--muted); font-size: 12px; }
.essay-anchors { margin-top: 12px; padding: 16px; border: 1px solid var(--line); background: #09162c; }
.essay-anchors b { font-size: 12px; }
.essay-anchors ul { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 0; padding: 0; list-style: none; }
.essay-anchors li { padding: 6px 9px; border: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.immediate-feedback { margin-top: 18px; padding: 18px; border: 1px solid var(--line); background: #09162c; }
.immediate-feedback.correct { border-color: rgba(101, 230, 168, .55); }
.immediate-feedback.incorrect { border-color: rgba(255, 155, 167, .55); }
.immediate-feedback b { color: var(--accent); }
.immediate-feedback p { margin: 6px 0 0; color: var(--muted); }
.immediate-feedback .ask-tutor { min-height: 40px; margin-top: 14px; padding-inline: 14px; border: 1px solid var(--accent); background: transparent; color: var(--accent); font-weight: 850; }
.immediate-feedback .tutor-response { margin-top: 16px; padding-top: 16px; }
.question-actions { display: flex; justify-content: space-between; gap: 12px; margin-top: 30px; }
.question-actions button { min-height: 48px; padding: 0 18px; border: 1px solid var(--line); background: transparent; color: var(--ink); font-weight: 850; }
.question-actions button:disabled { opacity: .35; cursor: not-allowed; }
.question-actions .primary { border-color: var(--accent); background: var(--accent); color: var(--bg); }
.pacing-card { position: sticky; top: 112px; padding: 20px; border: 1px solid var(--line); background: var(--panel); }
.pacing-card > span { color: var(--accent); font-size: 11px; font-weight: 900; text-transform: uppercase; letter-spacing: .12em; }
.pacing-card p { color: var(--muted); font-size: 14px; }
.pacing-card div { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); }
.pacing-card b { display: block; font-size: 32px; }
.pacing-card small { color: var(--muted); }

.result-shell { padding-block: 80px; }
.result-hero { display: flex; justify-content: space-between; gap: 40px; align-items: center; padding-bottom: 34px; border-bottom: 1px solid var(--line); }
.result-hero h2 { margin: 0; font-size: clamp(38px, 5vw, 66px); letter-spacing: -.05em; }
.result-hero p:not(.eyebrow) { max-width: 660px; color: var(--muted); }
.result-score { min-width: 160px; text-align: right; }
.result-score strong { display: block; font-size: 42px; color: var(--accent); }
.result-score span { color: var(--muted); }
.gate-results { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; padding-block: 30px; }
.gate-result { padding: 22px; border: 1px solid var(--line); background: var(--panel); }
.gate-result span { display: block; color: var(--muted); font-size: 13px; }
.gate-result strong { display: block; margin: 8px 0; font-size: 28px; }
.gate-result b { color: var(--success); }
.gate-result.fail b { color: var(--danger); }
.result-next { margin-bottom: 20px; padding: 28px; border: 1px solid var(--line); border-top: 4px solid var(--accent); background: var(--panel); }
.result-next-copy { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, .7fr); column-gap: 42px; align-items: end; }
.result-next-copy .eyebrow { grid-column: 1 / -1; }
.result-next-copy h3 { margin: 0; font-size: clamp(26px, 3vw, 38px); letter-spacing: -.035em; }
.result-next-copy > p:last-child { margin: 0; color: var(--muted); }
.result-next-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.result-next-actions button, .result-next-links button { min-height: 48px; padding: 0 18px; border: 1px solid var(--line); background: transparent; color: var(--ink); font-weight: 850; white-space: nowrap; }
.result-next-actions .primary { border-color: var(--accent); background: var(--accent); color: var(--bg); }
.result-next-actions button:hover, .result-next-actions button:focus-visible, .result-next-links button:hover, .result-next-links button:focus-visible { border-color: var(--accent); color: var(--accent); }
.result-next-actions .primary:hover, .result-next-actions .primary:focus-visible { background: #7bf4e8; color: var(--bg); }
.result-test-selector { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--line); }
.result-test-selector h4 { margin: 0 0 10px; font-size: 13px; color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.result-test-selector section > div { display: grid; gap: 8px; }
.result-test-selector article { display: grid; grid-template-columns: minmax(0, 1fr) auto; border: 1px solid var(--line); background: #09162c; }
.result-test-selector article > button:first-child { min-width: 0; display: flex; justify-content: space-between; gap: 16px; align-items: center; padding: 14px 16px; border: 0; background: transparent; color: var(--ink); text-align: left; }
.result-test-selector article > button:first-child b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.result-test-selector article > button:first-child span { flex: 0 0 auto; color: var(--accent); font-size: 11px; font-weight: 850; text-transform: uppercase; }
.result-test-selector article.is-locked > button:first-child span { color: var(--warning); }
.result-test-selector article:hover, .result-test-selector article:focus-within { border-color: var(--accent); }
.selector-configure { min-width: 78px; border: 0; border-left: 1px solid var(--line); background: transparent; color: var(--muted); font-size: 12px; font-weight: 800; }
.selector-configure:hover, .selector-configure:focus-visible { color: var(--accent); }
.result-next-links { display: flex; align-items: center; gap: 20px; margin-top: 18px; }
.result-next-links button { min-height: auto; padding: 0; border: 0; border-bottom: 1px solid var(--muted); color: var(--muted); font-size: 13px; }
.result-next-links a { color: var(--muted); font-size: 13px; }
.result-priority { padding: 24px; border: 1px solid rgba(44, 224, 207, .48); background: var(--accent-soft); }
.result-priority span { color: var(--accent); font-size: 11px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.result-priority h3 { margin: 4px 0; font-size: 28px; }
.result-priority p { margin: 0; color: var(--muted); }
.result-tutor { margin-top: 20px; }
.review-details { margin-top: 20px; }
.review-details summary { padding: 17px 0; font-weight: 850; cursor: pointer; }
.review-list { display: grid; gap: 10px; }
.review-item { display: grid; grid-template-columns: 50px 1fr auto; gap: 18px; align-items: start; padding: 18px; border: 1px solid var(--line); }
.review-item > span { display: grid; place-items: center; width: 38px; aspect-ratio: 1; border: 1px solid var(--line); font-weight: 900; }
.review-item.correct > span { color: var(--success); }
.review-item.incorrect > span { color: var(--danger); }
.review-item b { font-size: 14px; }
.review-item p { margin: 0; color: var(--muted); font-size: 14px; }
.review-item button { border: 0; background: transparent; color: var(--warning); font-size: 23px; }
.result-actions { display: flex; gap: 12px; margin-top: 28px; }
.result-actions button { min-height: 48px; padding: 0 18px; border: 1px solid var(--line); background: transparent; color: var(--ink); font-weight: 850; }

.limit-dialog { position: fixed; inset: 0; z-index: 60; display: grid; place-items: center; padding: 20px; background: rgba(2, 8, 19, .82); }
.auth-dialog { position: fixed; inset: 0; z-index: 70; display: grid; place-items: center; padding: 20px; background: rgba(2, 8, 19, .88); }
.auth-dialog .dialog-card { width: min(520px, 100%); }
.auth-dialog label { display: grid; gap: 7px; margin-top: 18px; color: var(--muted); font-size: 13px; font-weight: 800; }
.auth-dialog input { min-height: 48px; padding: 0 14px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); font: inherit; }
.auth-dialog button:not(.dialog-close) { width: 100%; min-height: 48px; margin-top: 12px; border: 1px solid var(--accent); background: transparent; color: var(--accent); font-weight: 850; }
.auth-dialog button.primary { background: var(--accent); color: var(--bg); }
.auth-divider { display: flex; align-items: center; gap: 10px; margin-top: 18px; color: var(--muted); font-size: 12px; }
.auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: var(--line); }
.auth-status { min-height: 22px; margin: 14px 0 0; color: var(--accent); font-size: 13px; }
.dialog-card { position: relative; width: min(500px, 100%); padding: 36px; border: 1px solid var(--line); border-top: 4px solid var(--accent); background: var(--panel); box-shadow: 24px 24px 0 rgba(0, 0, 0, .25); }
.access-dialog-card { width: min(760px, 100%); max-height: min(760px, calc(100dvh - 40px)); overflow-y: auto; box-shadow: 0 28px 80px rgba(0, 0, 0, .48); }
.access-dialog-heading { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 20px; align-items: start; }
.access-dialog-heading .lock-mark { margin: 0; }
.access-dialog-heading .eyebrow { margin-bottom: 8px; }
.access-dialog-card > p { max-width: 66ch; margin: 22px 0; }
.access-choice-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 12px; }
.access-choice-grid article { padding: 20px; border: 1px solid var(--line); background: #09162c; }
.access-choice-grid article > span { display: block; color: var(--muted); font-size: 12px; font-weight: 800; }
.access-choice-grid article > strong { display: block; margin-top: 7px; font-size: 27px; letter-spacing: -.035em; }
.access-choice-grid article > p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
.access-choice-grid .access-choice-recommended { border-color: rgba(44, 224, 207, .62); background: var(--accent-soft); }
.access-choice-grid .access-choice-recommended > span, .access-choice-grid .access-choice-recommended > strong { color: var(--accent); }
.access-tutor-note { margin: 15px 0 0 !important; color: var(--muted); font-size: 12px; }
.access-account-note { margin: 8px 0 0 !important; color: var(--muted); font-size: 12px; line-height: 1.55; }
.dialog-close { position: absolute; top: 10px; right: 12px; border: 0; background: transparent; color: var(--muted); font-size: 28px; }
.lock-mark { display: grid; place-items: center; width: 48px; aspect-ratio: 1; margin-bottom: 24px; background: var(--accent); color: var(--bg); font-weight: 950; }
.dialog-card h2 { margin: 0; font-size: 34px; line-height: 1.05; letter-spacing: -.035em; }
.dialog-card p, .dialog-card li { color: var(--muted); }
.dialog-card ul { padding-left: 20px; }
.dialog-card .primary { width: 100%; margin-top: 12px; }
.dialog-actions { display: grid; grid-template-columns: .7fr 1.3fr; gap: 10px; margin-top: 22px; }
.dialog-actions button { min-height: 48px; border: 1px solid var(--line); background: transparent; color: var(--ink); font-weight: 850; }
.dialog-actions .primary { margin: 0; border-color: var(--accent); background: var(--accent); color: var(--bg); }

footer { border-top: 1px solid var(--line); }
footer .shell { min-height: 160px; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
footer p { max-width: 650px; color: var(--muted); font-size: 13px; }
footer > div > a { color: var(--muted); font-size: 13px; }

:focus-visible { outline: 3px solid var(--warning); outline-offset: 3px; }

@media (max-width: 900px) {
  .topbar nav { display: none; }
  .account-pill { margin-left: auto; }
  .practice-hero { grid-template-columns: 1fr; gap: 36px; padding-block: 64px; }
  .research-strip .shell { grid-template-columns: 1fr; gap: 8px; padding-block: 24px; }
  .section-heading { grid-template-columns: 1fr; gap: 18px; }
  .pool-summary { grid-template-columns: repeat(2, 1fr); }
  .pool-summary div:nth-child(2) { border-right: 0; }
  .pool-summary div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .room-grid { grid-template-columns: 1fr; }
  .full-room { grid-column: auto; grid-template-columns: 64px 1fr; }
  .full-room button { grid-column: 1 / -1; grid-row: auto; }
  .session-layout { grid-template-columns: 1fr; }
  .config-grid, .skill-progress { grid-template-columns: 1fr; }
  .tutor-card, .result-tutor { grid-template-columns: 1fr; }
  .tutor-actions { justify-content: flex-start; }
  .tutor-response { grid-column: 1; }
  .dashboard-metrics { grid-template-columns: repeat(2, 1fr); }
  .question-map { position: static; order: 2; grid-template-columns: repeat(10, 1fr); }
  .question-card { order: 1; }
  .pacing-card { position: static; order: 3; }
  .gate-results { grid-template-columns: 1fr; }
  .result-next-copy, .result-test-selector { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .shell { width: min(100% - 28px, var(--shell)); }
  .practice-hero h1 { font-size: 52px; }
  .topbar-inner { min-height: 64px; }
  .official-facts { display: grid; }
  .part-heading { align-items: flex-start; }
  .part-heading > b { display: none; }
  .section { padding-block: 62px; }
  .session-topbar { align-items: flex-start; padding-block: 14px; }
  .session-metrics { gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
  .session-metrics > span { display: none; }
  .question-card { padding: 22px 16px; }
  .question-type { display: grid; }
  .question-type small { text-align: left; }
  .question-map { grid-template-columns: repeat(8, 1fr); }
  .review-item { grid-template-columns: 40px 1fr; }
  .review-item p { grid-column: 2; }
  .result-hero { align-items: flex-start; }
  .result-score { min-width: 100px; }
  .result-next { padding: 22px 16px; }
  .result-next-actions { display: grid; }
  .result-next-actions button { width: 100%; white-space: normal; }
  .result-next-links { align-items: flex-start; flex-direction: column; }
  .result-test-selector article { grid-template-columns: 1fr; }
  .access-dialog-card { padding: 28px 18px 20px; max-height: 100dvh; }
  .access-dialog-heading { grid-template-columns: 1fr; gap: 14px; }
  .access-dialog-heading .lock-mark { width: 42px; }
  .access-choice-grid, .dialog-actions { grid-template-columns: 1fr; }
  .selector-configure { min-height: 40px; border-left: 0; border-top: 1px solid var(--line); }
  .recommendation-card { align-items: flex-start; flex-direction: column; }
  .recommendation-card button { width: 100%; }
  .config-grid fieldset { grid-template-columns: 1fr; }
  .bundle-card > header { grid-template-columns: 1fr; }
  .bundle-price { text-align: left; }
  .tutor-value { grid-template-columns: 1fr; }
  .tutor-value > b { transform: rotate(90deg); transform-origin: left center; }
  .tutor-actions { display: grid; }
  .dashboard-metrics { grid-template-columns: 1fr 1fr; }
  footer .shell { align-items: flex-start; flex-direction: column; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}