.coverage-page {
  min-height: 100vh;
  background: var(--bg);
}
.coverage-page .site-head { position: relative; top: auto; }

.coverage-root { min-height: calc(100vh - 62px); }
.coverage-shell { width: min(1100px, calc(100% - 40px)); margin: 0 auto; padding: 54px 0 104px; }
.coverage-reading { width: min(780px, calc(100% - 40px)); margin: 0 auto; padding: 48px 0 110px; }
.coverage-kicker { margin: 0 0 10px; color: var(--accent); font: 700 10px/1.45 "SFMono-Regular", Consolas, monospace; letter-spacing: .15em; text-transform: uppercase; }
.coverage-subtle { color: var(--text-muted); }
.coverage-page .btn { min-height: 40px; }
.coverage-page .toast { z-index: 100; background: var(--panel-2); color: var(--text); }

.coverage-hero { max-width: 860px; margin-bottom: 30px; }
.coverage-hero h1 { max-width: 820px; margin-bottom: 15px; font-size: clamp(38px, 6vw, 54px); }
.coverage-hero .promise { max-width: 760px; margin: 0; color: var(--text-dim); font-size: 18px; line-height: 1.8; }
.coverage-hero strong { color: var(--accent-bright); }
.coverage-decision { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 14px; margin-top: 22px; padding: 17px 19px; background: var(--panel); border: 1px solid var(--border); border-left: 4px solid var(--warn); border-radius: var(--r-panel); }
.coverage-decision b { color: var(--warn); font: 800 12px/1.6 "SFMono-Regular", Consolas, monospace; }
.coverage-decision p { margin: 0; color: var(--text-dim); }
.coverage-decision strong { color: var(--text); }
.term-mode { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-top: 14px; }
.term-mode > span { color: var(--text-muted); font-size: 11px; }
.term-mode button { min-height: 34px; padding: 5px 9px; color: var(--text-dim); background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-control); cursor: pointer; }
.term-mode button[aria-pressed="true"] { color: var(--text); border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--panel)); }
.term-mode button:focus-visible { outline: none; box-shadow: var(--focus); }
.medical-term { text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 36%, transparent); text-decoration-thickness: 1px; text-underline-offset: .18em; }

.coverage-stat-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 11px; margin: 28px 0 38px; }
.coverage-stat { min-width: 0; padding: 16px 17px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-control); }
.coverage-stat strong { display: block; color: var(--accent-bright); font: 750 26px/1.15 "SFMono-Regular", Consolas, monospace; font-variant-numeric: tabular-nums; }
.coverage-stat span { display: block; margin-top: 6px; color: var(--text-muted); font: 650 9.5px/1.45 "SFMono-Regular", Consolas, monospace; letter-spacing: .08em; text-transform: uppercase; }

.coverage-next { margin: 36px 0 52px; padding: 22px; background: color-mix(in srgb, var(--accent) 7%, var(--panel)); border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border)); border-radius: var(--r-panel); }
.coverage-next > header { display: flex; align-items: start; justify-content: space-between; gap: 20px; }
.coverage-next h2 { margin: 0 0 5px; font-size: 25px; }
.coverage-next p { margin: 0; color: var(--text-dim); }
.entry-mode-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.entry-mode-grid a { min-width: 0; display: grid; gap: 5px; padding: 16px; color: inherit; text-decoration: none; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-control); }
.entry-mode-grid a:hover { border-color: var(--accent); transform: translateY(-2px); }
.entry-mode-grid strong { color: var(--text); }
.entry-mode-grid span { color: var(--text-muted); font-size: 12px; }
.coverage-action-row { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 16px; }
.coverage-primary, .coverage-secondary { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 8px 14px; border-radius: var(--r-control); text-decoration: none; font-size: 13px; font-weight: 700; }
.coverage-primary { color: var(--bg); background: var(--accent-bright); border: 1px solid var(--accent-bright); }
.coverage-secondary { color: var(--text); background: var(--panel); border: 1px solid var(--border-strong); }
.coverage-primary:hover, .coverage-secondary:hover { transform: translateY(-1px); }
.coverage-primary:focus-visible, .coverage-secondary:focus-visible { outline: none; box-shadow: var(--focus); }

.coverage-section { margin: 58px 0; scroll-margin-top: 84px; }
.coverage-section-head { display: flex; align-items: end; justify-content: space-between; gap: 22px; margin-bottom: 18px; padding-bottom: 11px; border-bottom: 1px solid var(--border); }
.coverage-section-head h2 { margin: 0; }
.coverage-section-head p { max-width: 520px; margin: 0; color: var(--text-muted); font-size: 12.5px; text-align: right; }
.coverage-priority-key { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.coverage-pill { display: inline-flex; align-items: center; gap: 5px; padding: 3px 8px; color: var(--text-muted); border: 1px solid var(--border); border-radius: 999px; font: 650 9.5px/1.4 "SFMono-Regular", Consolas, monospace; }
.coverage-pill.a { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 35%, var(--border)); }
.coverage-pill.b { color: var(--info); border-color: color-mix(in srgb, var(--info) 35%, var(--border)); }
.coverage-pill.good { color: var(--good); border-color: color-mix(in srgb, var(--good) 35%, var(--border)); }
.coverage-pill.bad { color: var(--bad); border-color: color-mix(in srgb, var(--bad) 35%, var(--border)); }

.coverage-controls { display: grid; grid-template-columns: minmax(220px, 1.5fr) repeat(3, minmax(130px, 1fr)); gap: 10px; margin: 18px 0; padding: 14px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-panel); }
.coverage-controls label { min-width: 0; }
.coverage-controls span { display: block; margin-bottom: 5px; color: var(--text-muted); font: 650 9px/1.4 "SFMono-Regular", Consolas, monospace; letter-spacing: .08em; text-transform: uppercase; }
.coverage-controls input, .coverage-controls select { width: 100%; min-height: 40px; padding: 8px 10px; color: var(--text); background: var(--bg-alt); border: 1px solid var(--border-strong); border-radius: var(--r-control); }
.coverage-controls input:focus-visible, .coverage-controls select:focus-visible { outline: none; box-shadow: var(--focus); border-color: var(--accent); }

.expansion-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; }
.expansion-card { min-width: 0; display: flex; flex-direction: column; padding: 18px; color: inherit; text-decoration: none; background: var(--panel); border: 1px solid var(--border); border-left: 4px solid var(--border-strong); border-radius: var(--r-panel); }
.expansion-card[data-priority="A"] { border-left-color: var(--warn); }
.expansion-card[data-priority="B"] { border-left-color: var(--info); }
.expansion-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.expansion-card:focus-visible { outline: none; box-shadow: var(--focus); }
.expansion-card-top { display: flex; justify-content: space-between; gap: 10px; color: var(--text-muted); font: 650 9.5px/1.45 "SFMono-Regular", Consolas, monospace; letter-spacing: .07em; }
.expansion-card h3 { margin: 10px 0 7px; color: var(--text); font-size: 18px; line-height: 1.45; }
.expansion-card p { margin: 0; color: var(--text-dim); font-size: 13px; line-height: 1.7; }
.expansion-card-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 13px; }

.core-strip { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.core-link { min-width: 0; display: grid; grid-template-columns: 52px minmax(0, 1fr); gap: 11px; padding: 13px 14px; color: inherit; text-decoration: none; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-control); }
.core-link:hover { border-color: var(--accent); }
.core-link b { color: var(--accent); font: 700 11px/1.7 "SFMono-Regular", Consolas, monospace; }
.core-link strong { display: block; color: var(--text); font-size: 13.5px; }
.core-link span { display: block; color: var(--text-muted); font-size: 11px; }

.coverage-table-wrap { width: 100%; max-width: 100%; min-width: 0; overflow: auto; contain: inline-size; border: 1px solid var(--border); border-radius: var(--r-panel); background: var(--panel); }
.coverage-table-hint { display: none; margin: 0 0 8px; color: var(--text-muted); font-size: 11.5px; }
.coverage-table { width: 100%; min-width: 760px; border-collapse: collapse; }
.coverage-table th, .coverage-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.coverage-table th { position: sticky; top: 0; z-index: 1; color: var(--text-muted); background: var(--panel-2); font: 700 9px/1.4 "SFMono-Regular", Consolas, monospace; letter-spacing: .08em; text-transform: uppercase; }
.coverage-table td { color: var(--text-dim); font-size: 12.5px; }
.coverage-table td:first-child { color: var(--accent); font-family: "SFMono-Regular", Consolas, monospace; }
.coverage-table td:nth-child(3) { color: var(--text); }
.coverage-table tr:last-child td { border-bottom: 0; }
.coverage-route { color: var(--accent-bright); text-decoration: none; }
.coverage-empty { padding: 38px 20px; color: var(--text-muted); text-align: center; border: 1px dashed var(--border-strong); border-radius: var(--r-panel); }

.expansion-hero { margin-bottom: 46px; }
.expansion-hero.compact { margin-bottom: 20px; }
.expansion-hero h1 { max-width: 760px; }
.expansion-hero .promise { color: var(--text-dim); font-size: 18px; }
.expansion-brief { margin-top: 22px; padding: 18px 20px; background: color-mix(in srgb, var(--accent) 8%, var(--panel)); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: var(--r-panel); }
.expansion-brief span { display: block; margin-bottom: 6px; color: var(--accent); font: 700 9.5px/1.4 "SFMono-Regular", Consolas, monospace; letter-spacing: .1em; text-transform: uppercase; }
.expansion-brief strong { color: var(--text); font-size: 18px; }
.expansion-agenda { display: grid; gap: 7px; margin: 20px 0 0; padding: 0; list-style: none; }
.expansion-agenda li { display: grid; grid-template-columns: 42px minmax(0, 1fr); gap: 10px; padding: 10px 12px; background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--r-control); color: var(--text-dim); font-size: 13px; }
.expansion-agenda b { color: var(--accent); font-family: "SFMono-Regular", Consolas, monospace; }
.chapter-overview { margin-top: 16px; background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--r-control); }
.chapter-overview > summary { padding: 11px 13px; color: var(--text-dim); cursor: pointer; font-weight: 700; }
.chapter-overview[open] > summary { color: var(--text); border-bottom: 1px solid var(--border); }
.chapter-overview > .coverage-section, .chapter-overview > .study-netter { margin: 18px; }
.chapter-step-list { display: grid; gap: 5px; margin: 18px; padding-left: 24px; }
.chapter-step-list a { color: var(--text-dim); text-decoration: none; }
.chapter-step-list .current a { color: var(--accent-bright); font-weight: 700; }
.chapter-stepper { position: sticky; top: 0; z-index: 12; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 10px; margin: 0 0 18px; padding: 9px 10px; background: color-mix(in srgb, var(--bg) 94%, transparent); border: 1px solid var(--border-strong); border-radius: var(--r-control); backdrop-filter: blur(10px); }
.chapter-stepper a { color: var(--text-dim); text-decoration: none; }
.chapter-stepper .stepper-home { padding: 6px 8px; font-size: 11px; }
.chapter-stepper label { min-width: 0; display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 8px; }
.chapter-stepper label span { color: var(--text-muted); font: 650 9.5px/1.4 "SFMono-Regular", Consolas, monospace; white-space: nowrap; }
.chapter-stepper select { min-width: 0; width: 100%; min-height: 36px; padding: 6px 8px; color: var(--text); text-overflow: ellipsis; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-control); }
.stepper-arrows { display: flex; gap: 5px; }
.stepper-arrows a, .stepper-arrows span { width: 34px; height: 34px; display: grid; place-items: center; color: var(--text); background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-control); }
.stepper-arrows span { color: var(--text-muted); opacity: .45; }
.chapter-stepper a:focus-visible, .chapter-stepper select:focus-visible { outline: none; box-shadow: var(--focus); }
.guided-task { min-width: 0; max-height: min(500px, calc(100vh - 110px)); overflow: auto; overscroll-behavior: contain; scrollbar-gutter: stable; outline: none; }

.expansion-node { margin: 68px 0; scroll-margin-top: 84px; }
.guided-node { margin: 0; }
.expansion-node-head { margin-bottom: 17px; }
.expansion-node-head h2 { margin: 4px 0 0; }
.node-phase-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; margin: 10px 0; }
.node-phase-tabs button { min-height: 38px; padding: 6px 8px; color: var(--text-muted); background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--r-control); cursor: pointer; }
.node-phase-tabs button[aria-selected="true"] { color: var(--text); background: color-mix(in srgb, var(--accent) 10%, var(--panel)); border-color: var(--accent); }
.node-phase-tabs button:focus-visible { outline: none; box-shadow: var(--focus); }
[data-node-phase] { max-height: 330px; overflow: auto; overscroll-behavior: contain; scrollbar-gutter: stable; }
[data-node-phase][hidden] { display: none !important; }
.phase-instruction { margin: 8px 2px 0; color: var(--text-muted); font-size: 12px; }
.expansion-node-core { margin: 13px 0; padding: 14px 16px; background: var(--panel); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: var(--r-control); }
.expansion-node-core span, .expansion-cue span, .expansion-boundary span { display: block; margin-bottom: 5px; color: var(--accent); font: 700 9.5px/1.4 "SFMono-Regular", Consolas, monospace; letter-spacing: .1em; text-transform: uppercase; }
.expansion-node-core p, .expansion-cue p, .expansion-boundary p { margin: 0; }
.expansion-node-core p { color: var(--text); font-size: 16px; font-weight: 650; line-height: 1.65; }
.expansion-cue, .expansion-boundary { margin: 12px 0; padding: 14px 16px; background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--r-control); color: var(--text-dim); }
.expansion-boundary { border-left: 3px solid var(--warn); }
.expansion-boundary span { color: var(--warn); }
.node-support { margin: 10px 0; background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--r-control); }
.node-support > summary { padding: 9px 11px; color: var(--text-muted); cursor: pointer; font-size: 12px; font-weight: 700; }
.node-support .expansion-cue, .node-support .expansion-boundary { margin: 8px; }
.core-jump { color: var(--accent-bright); text-decoration: none; }
.active-checkpoint { margin-top: 18px; padding-top: 15px; border-top: 1px solid var(--border); }
.active-checkpoint h3 { margin: 0 0 10px; font-size: 16px; }

.fact-stack { display: grid; gap: 9px; margin: 12px 0; }
.fact-card { padding: 15px 16px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-control); }
.fact-card .fact-q { margin: 0; color: var(--text); font-weight: 650; }
.fact-card .fact-a { margin: 8px 0 0; padding-top: 8px; color: var(--text-dim); border-top: 1px solid var(--border); }
.fact-card .fact-hook { margin: 6px 0 0; color: var(--accent-bright); font-size: 12.5px; }
.fact-card .active-answer { margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--border); }
.fact-card .active-answer .fact-a { margin: 0; padding: 0; border: 0; }
.reveal-answer, .more-facts { min-height: 36px; margin-top: 10px; padding: 6px 10px; color: var(--accent-bright); background: var(--bg-alt); border: 1px solid var(--border-strong); border-radius: var(--r-control); cursor: pointer; }
.reveal-answer:hover, .more-facts:hover { border-color: var(--accent); }
.reveal-answer:focus-visible, .more-facts:focus-visible { outline: none; box-shadow: var(--focus); }
.fact-pager { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.fact-pager span { color: var(--text-muted); font: 650 10px/1.4 "SFMono-Regular", Consolas, monospace; }
.fact-pager .more-facts { margin-top: 0; }
.fact-pager .more-facts:disabled { cursor: not-allowed; opacity: .4; }
.coverage-page[data-mask-answers="true"] .fact-card { cursor: pointer; }
.coverage-page[data-mask-answers="true"] .fact-card:focus-visible { outline: none; box-shadow: var(--focus); border-color: var(--accent); }
.coverage-page[data-mask-answers="true"] .fact-a, .coverage-page[data-mask-answers="true"] .fact-hook { filter: blur(5px); opacity: .5; cursor: pointer; user-select: none; }
.coverage-page[data-mask-answers="true"] .fact-card.is-revealed .fact-a, .coverage-page[data-mask-answers="true"] .fact-card.is-revealed .fact-hook { filter: none; opacity: 1; user-select: text; }
.answer-mode { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin: 18px 0; padding: 12px 14px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-control); }
.answer-mode p { margin: 0; color: var(--text-dim); font-size: 12.5px; }
.answer-mode button { min-height: 36px; padding: 6px 10px; color: var(--text); background: var(--bg-alt); border: 1px solid var(--border-strong); border-radius: var(--r-control); cursor: pointer; }

.worked-grid { display: grid; gap: 14px; }
.worked-case { padding: 19px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-panel); }
.worked-case h3 { margin: 4px 0 10px; }
.worked-case .case-stem { padding: 13px 14px; color: var(--text); background: var(--bg-alt); border-left: 3px solid var(--warn); border-radius: var(--r-control); }
.worked-case ol { color: var(--text-dim); }
.worked-case .case-takeaway { color: var(--accent-bright); }
.active-learning-card { min-height: 390px; display: flex; flex-direction: column; justify-content: center; padding: clamp(20px, 4vw, 34px); background: var(--panel); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: var(--r-panel); }
.active-learning-card h2 { margin: 3px 0 16px; }
.active-learning-card .case-stem, .active-learning-card .retrieval-prompt, .reviewer-claim { padding: 15px 16px; color: var(--text); background: var(--bg-alt); border-left: 3px solid var(--warn); border-radius: var(--r-control); font-size: 17px; line-height: 1.75; }
.predict-prompt { margin: 10px 0; color: var(--text-dim); }
.active-answer { margin-top: 12px; padding: 14px 16px; color: var(--text-dim); background: color-mix(in srgb, var(--good) 6%, var(--bg-alt)); border: 1px solid color-mix(in srgb, var(--good) 26%, var(--border)); border-radius: var(--r-control); }
.active-answer[hidden], [data-extra-fact][hidden], [data-fact-slide][hidden] { display: none !important; }
.active-answer ol { margin: 0; padding-left: 22px; }
.active-answer li + li { margin-top: 7px; }
.activity-confidence { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--border); }
.activity-confidence span { color: var(--text-muted); font-size: 11px; }
.activity-confidence button { min-height: 36px; padding: 6px 9px; color: var(--text-dim); background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--r-control); cursor: pointer; }
.activity-confidence button[aria-pressed="true"] { color: var(--good); border-color: var(--good); }
.activity-confidence button:focus-visible { outline: none; box-shadow: var(--focus); }
.expansion-list-card { padding: 18px 20px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-panel); }
.expansion-list-card + .expansion-list-card { margin-top: 12px; }
.expansion-list-card ul, .expansion-list-card ol { color: var(--text-dim); }
.expansion-list-card li { margin: 8px 0; line-height: 1.75; }
.expansion-list-card > p:not(.coverage-kicker) { color: var(--text-dim); }
.expansion-list-card .case-takeaway { color: var(--accent-bright); }
.evidence-action { display: grid; gap: 10px; margin-top: 16px; padding: 16px; background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--r-control); }
.evidence-action p { margin: 0; color: var(--text-dim); font-size: 13px; }
.evidence-action button { width: fit-content; min-height: 40px; padding: 7px 12px; color: var(--text); background: var(--panel-2); border: 1px solid var(--border-strong); border-radius: var(--r-control); cursor: pointer; }
.evidence-action button[aria-pressed="true"] { color: var(--good); border-color: color-mix(in srgb, var(--good) 40%, var(--border)); }
.evidence-action button:disabled { cursor: not-allowed; opacity: .55; }

.coverage-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 70px; padding-top: 22px; border-top: 1px solid var(--border); }
.coverage-nav a { padding: 13px 14px; color: var(--text-dim); text-decoration: none; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-control); }
.coverage-nav a:hover { color: var(--text); border-color: var(--accent); }
.coverage-nav .hub { grid-column: 1 / -1; text-align: center; }

.gate-shell { width: min(920px, calc(100% - 40px)); margin: 0 auto; padding: 48px 0 100px; }
.gate-warning { margin: 20px 0; padding: 17px 18px; color: var(--text-dim); background: color-mix(in srgb, var(--warn) 7%, var(--panel)); border: 1px solid color-mix(in srgb, var(--warn) 30%, var(--border)); border-left: 4px solid var(--warn); border-radius: var(--r-panel); }
.gate-warning strong { color: var(--warn); }
.gate-setup { max-width: 700px; display: grid; gap: 14px; padding: 21px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-panel); }
.gate-setup label > span { display: block; margin-bottom: 5px; color: var(--text-muted); font: 650 9.5px/1.4 "SFMono-Regular", Consolas, monospace; letter-spacing: .08em; }
.gate-setup select { width: 100%; min-height: 42px; padding: 8px 10px; color: var(--text); background: var(--bg-alt); border: 1px solid var(--border-strong); border-radius: var(--r-control); }
.gate-honesty { display: flex; align-items: start; gap: 10px; color: var(--text-dim); }
.gate-honesty input { width: 18px; height: 18px; margin-top: 5px; accent-color: var(--accent); }
.gate-session { max-width: 820px; margin: 0 auto; }
.gate-session-head { position: sticky; top: 0; z-index: 5; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; padding: 12px 14px; background: color-mix(in srgb, var(--bg) 94%, transparent); border: 1px solid var(--border); border-radius: var(--r-control); backdrop-filter: blur(8px); }
.gate-session-head p { margin: 0; color: var(--text-dim); font-size: 12px; }
.gate-head-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px; }
.gate-session-head .is-overdue { color: var(--bad); font-weight: 700; }
.gate-progress { grid-column: 1 / -1; height: 5px; overflow: hidden; background: var(--border); border-radius: 999px; }
.gate-progress span { display: block; height: 100%; background: var(--accent); }
.gate-question { margin-top: 18px; padding: 22px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-panel); }
.gate-question h2 { margin: 8px 0 16px; font-size: 21px; line-height: 1.6; }
.gate-question h2 { white-space: pre-line; }
.gate-media { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 0 0 16px; padding: 10px; background: #f7f7f5; border: 1px solid var(--border); border-radius: var(--r-control); }
.gate-media img { width: 100%; height: min(430px, 48vh); object-fit: contain; background: #fff; border-radius: 5px; }
.gate-media figcaption { grid-column: 1 / -1; color: #4c5560; font-size: 11px; text-align: center; }
.gate-options { display: grid; gap: 8px; }
.gate-option { display: grid; grid-template-columns: 31px minmax(0, 1fr); gap: 9px; align-items: start; min-height: 46px; padding: 10px 12px; color: var(--text-dim); background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--r-control); cursor: pointer; text-align: left; }
.gate-option:hover, .gate-option.is-selected { color: var(--text); border-color: var(--accent); }
.gate-option b { color: var(--accent); }
.gate-confidence { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-top: 15px; padding-top: 13px; border-top: 1px solid var(--border); }
.gate-confidence span { margin-right: 4px; color: var(--text-muted); font-size: 11.5px; }
.gate-confidence button { min-height: 34px; padding: 5px 9px; color: var(--text-dim); background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--r-control); cursor: pointer; }
.gate-confidence button.is-selected { color: var(--text); border-color: var(--accent); }
.gate-option:focus-visible, .gate-confidence button:focus-visible, .gate-palette button:focus-visible, .gate-session-head button:focus-visible { outline: none; box-shadow: var(--focus); }
.gate-actions { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 9px; margin-top: 14px; }
.gate-palette { display: grid; grid-template-columns: repeat(10, minmax(0, 1fr)); gap: 5px; margin-top: 14px; }
.gate-palette button { min-height: 30px; padding: 3px; color: var(--text-muted); background: var(--panel); border: 1px solid var(--border); border-radius: 5px; cursor: pointer; font: 650 9px/1 "SFMono-Regular", Consolas, monospace; }
.gate-palette button.answered { color: var(--good); border-color: color-mix(in srgb, var(--good) 35%, var(--border)); }
.gate-palette button.current { color: var(--text); border-color: var(--accent); }
.gate-result-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin: 22px 0; }
.gate-result { padding: 17px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-control); }
.gate-result strong { display: block; color: var(--accent-bright); font: 750 25px/1.2 "SFMono-Regular", Consolas, monospace; }
.gate-result span { color: var(--text-muted); font-size: 11px; }
.gate-subject-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; }
.gate-wrong-list { display: grid; gap: 9px; }
.gate-wrong { padding: 14px 15px; background: var(--panel); border: 1px solid var(--border); border-left: 3px solid var(--bad); border-radius: var(--r-control); }
.gate-wrong p { margin: 5px 0; color: var(--text-dim); font-size: 13px; }
.gate-wrong strong { color: var(--text); }

@media (max-width: 1599px) {
  .coverage-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .coverage-controls label:first-child { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .coverage-stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .entry-mode-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .coverage-shell, .coverage-reading, .gate-shell { width: min(100% - 30px, 780px); padding-top: 36px; }
  .coverage-page .study-head-actions .head-link { display: none; }
  .coverage-stat-grid, .expansion-grid, .core-strip, .coverage-controls, .coverage-nav, .gate-result-grid, .gate-subject-grid { grid-template-columns: 1fr; }
  .coverage-controls label:first-child, .coverage-nav .hub { grid-column: auto; }
  .coverage-section-head, .coverage-next > header { display: grid; }
  .coverage-section-head p { text-align: left; }
  .chapter-stepper { grid-template-columns: minmax(0, 1fr) auto; }
  .chapter-stepper .stepper-home { grid-column: 1 / -1; width: fit-content; }
  .chapter-stepper label { grid-template-columns: 1fr; gap: 3px; }
  .chapter-stepper label span { white-space: normal; }
  .active-learning-card { min-height: 0; padding: 18px; }
  .active-learning-card .case-stem, .active-learning-card .retrieval-prompt, .reviewer-claim { font-size: 15px; }
  .gate-question { padding: 17px; }
  .gate-media { grid-template-columns: 1fr; }
  .gate-media figcaption { grid-column: auto; }
  .gate-session-head { top: 0; }
  .gate-palette { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .coverage-table-hint { display: block; }
}

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

@media print {
  .coverage-page { background: #faf7f0; }
  .coverage-page .site-head, .coverage-controls, .coverage-action-row, .answer-mode, .evidence-action, .coverage-nav, .gate-actions, .gate-palette, .chapter-stepper, .reveal-answer, .more-facts, .activity-confidence { display: none !important; }
  .coverage-shell, .coverage-reading, .gate-shell { width: 100%; padding: 0; }
  .guided-task { max-height: none; overflow: visible; }
  .fact-card, .worked-case, .expansion-node { break-inside: avoid; }
  .chapter-overview > * { display: block !important; }
  .chapter-overview > summary { display: none !important; }
  .active-answer, [data-extra-fact], [data-fact-slide] { display: block !important; }
  .coverage-page[data-mask-answers="true"] .fact-a, .coverage-page[data-mask-answers="true"] .fact-hook { filter: none; opacity: 1; }
}