:root {
  --ink: #102a43;
  --ink-deep: #061c31;
  --slate: #2c3e50;
  --sky: #1976d2;
  --sky-brand: #3ea8dd;
  --sky-soft: #e8f4fd;
  --teal: #168c86;
  --teal-soft: #e6f6f4;
  --amber: #f2b84b;
  --amber-soft: #fff6df;
  --coral: #d95d62;
  --coral-soft: #fff0f0;
  --mist: #edf5fa;
  --cloud: #f7fafc;
  --white: #fff;
  --graphite: #1f2a30;
  --muted: #5e7080;
  --line: #d6e2ea;
  --line-dark: #b8cad6;
  --shadow: 0 8px 26px rgb(16 42 67 / 7%);
  --radius-sm: 8px;
  --radius: 13px;
  --radius-lg: 18px;
  --sidebar-width: 244px;
  --topbar-height: 74px;
  --text-scale: 1;
  --display: "Aptos Display", "Segoe UI Variable Display", "Segoe UI", Arial, sans-serif;
  --body: "Aptos", "Segoe UI Variable Text", "Segoe UI", Arial, sans-serif;
  --mono: "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }
html { background: var(--cloud); scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--graphite);
  background: var(--cloud);
  font-family: var(--body);
  font-size: calc(16px * var(--text-scale));
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}
button, input, select, textarea { font: inherit; }
button { color: inherit; }
a { color: var(--sky); }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--ink); font-family: var(--display); line-height: 1.15; }
h1 { font-size: clamp(2rem, 3vw, 2.7rem); letter-spacing: -0.035em; }
h2 { font-size: 1.28rem; letter-spacing: -0.018em; }
h3 { font-size: 1rem; }
code { font-family: var(--mono); }

:focus-visible { outline: 3px solid var(--sky-brand); outline-offset: 3px; }
::selection { color: var(--ink-deep); background: #bfe8ff; }

.skip-link {
  position: fixed; top: 8px; left: 12px; z-index: 1000;
  transform: translateY(-150%); padding: 10px 14px;
  color: var(--white); background: var(--ink); border-radius: 8px;
}
.skip-link:focus { transform: translateY(0); }
.noscript-message { margin: 40px; padding: 24px; border: 2px solid var(--coral); background: var(--coral-soft); }

.app-shell { min-height: 100vh; display: flex; }
.app-body { width: calc(100% - var(--sidebar-width)); margin-left: var(--sidebar-width); min-width: 0; }
.sidebar {
  position: fixed; inset: 0 auto 0 0; z-index: 30;
  width: var(--sidebar-width); min-height: 100vh; padding: 28px 16px 20px;
  color: #e9f7ff; background: linear-gradient(180deg, #061d33 0%, #05233d 70%, #061d33 100%);
  display: flex; flex-direction: column; overflow-y: auto;
}
.brand-block { padding: 0 13px 20px; }
.brand-mark-row { min-height: 56px; display: flex; align-items: center; justify-content: space-between; }
.brand-mark { width: 88px; height: 58px; object-fit: contain; object-position: left center; }
.brand-name { margin-top: 12px; color: var(--white); font-family: var(--display); font-size: 1.36rem; font-weight: 750; letter-spacing: -0.03em; }
.brand-line { margin-top: 12px; color: #d5e7f2; font-size: .95rem; line-height: 1.55; }
.sponsor-lockup { margin-top: 15px; padding-top: 13px; border-top: 1px solid rgb(214 226 234 / 28%); display: grid; gap: 2px; }
.sponsor-lockup strong { color: var(--white); font-size: .76rem; }
.sponsor-lockup span { color: #d5e7f2; font-size: .7rem; line-height: 1.35; }
.sponsor-lockup small { margin-top: 5px; color: #9edcff; font-size: .62rem; line-height: 1.35; }
.nav-list { display: grid; gap: 6px; margin-top: 4px; }
.nav-item {
  width: 100%; min-height: 52px; padding: 0 13px; border: 0; border-radius: 9px;
  color: #e4f0f7; background: transparent; display: flex; align-items: center; gap: 14px;
  font-size: .98rem; text-align: left; cursor: pointer; transition: background .18s ease, color .18s ease, transform .18s ease;
}
.nav-item:hover { background: rgb(255 255 255 / 8%); }
.nav-item:active { transform: translateY(1px); }
.nav-item.is-active { color: var(--white); background: linear-gradient(135deg, #1469b5, #197fdd); box-shadow: 0 8px 20px rgb(0 0 0 / 20%); }
.sidebar-footer { margin-top: auto; padding: 20px 12px 0; border-top: 1px solid rgb(214 226 234 / 34%); }
.saved-status { display: flex; gap: 8px; align-items: flex-start; color: #e3f1f8; font-size: .78rem; }
.sidebar-link { margin-top: 22px; color: #c7e7fa !important; text-align: left; font-size: .78rem !important; line-height: 1.45; text-decoration: underline; text-underline-offset: 4px; }
.mobile-close, .mobile-menu, .nav-scrim { display: none !important; }

.topbar {
  position: sticky; top: 0; z-index: 20; height: var(--topbar-height);
  padding: 0 34px; border-bottom: 1px solid var(--line); background: rgb(255 255 255 / 94%);
  backdrop-filter: blur(12px); display: flex; align-items: center; justify-content: space-between;
}
.access-tools { display: flex; align-items: center; gap: 8px; color: var(--ink); }
.tool-label { margin-right: 4px; font-size: .88rem; }
.tool-divider { width: 1px; height: 26px; margin: 0 8px; background: var(--line); }
.access-button, .icon-button {
  width: 38px; height: 38px; border: 1px solid transparent; border-radius: 8px;
  background: transparent; display: inline-grid; place-items: center; cursor: pointer;
}
.access-button { font-size: .9rem; }
.access-button:nth-of-type(2) { font-size: 1rem; }
.access-large { font-size: 1.22rem; }
.access-button:hover, .access-button.is-active { color: #075ca8; background: #e3f2ff; border-color: #c9e5fb; }
.switch { width: 44px; height: 24px; padding: 3px; border: 0; border-radius: 999px; background: #a9bac6; cursor: pointer; transition: background .18s ease; }
.switch span { display: block; width: 18px; height: 18px; border-radius: 50%; background: var(--white); box-shadow: 0 1px 3px rgb(0 0 0 / 25%); transition: transform .18s ease; }
.switch.is-on { background: var(--sky); }
.switch.is-on span { transform: translateX(20px); }
.planner-label { color: var(--ink); font-size: .92rem; font-weight: 650; }

.main-content { min-height: calc(100vh - var(--topbar-height)); padding: 26px 26px 42px; }
.page { width: min(1180px, 100%); margin: 0 auto; }
.page-enter { animation: page-in .28s ease both; }
@keyframes page-in { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
.panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: 0 1px 0 rgb(16 42 67 / 2%); }
.page-header { margin: 8px 0 24px; }
.page-header h1 { margin-bottom: 8px; }
.page-header p { max-width: 760px; margin-bottom: 0; color: var(--muted); font-size: 1.03rem; }
.split-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; }
.header-stat { min-width: 160px; text-align: right; }
.header-stat strong { display: block; color: var(--ink); font-size: 1.55rem; }
.header-stat span { color: var(--muted); font-size: .8rem; }

.button-row { display: flex; flex-wrap: wrap; gap: 14px; }
.button {
  min-height: 46px; padding: 0 20px; border: 1px solid transparent; border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-size: .91rem; font-weight: 720; letter-spacing: -.005em; cursor: pointer; transition: transform .16s ease, box-shadow .16s ease, background .16s ease;
}
.button:hover:not(:disabled) { transform: translateY(-1px); }
.button:disabled { opacity: .45; cursor: not-allowed; }
.button.primary { color: var(--white); background: linear-gradient(135deg, #0a6bc5, #1684e0); box-shadow: 0 7px 16px rgb(25 118 210 / 18%); }
.button.secondary { color: #075ca8; background: var(--white); border-color: #2686d6; }
.button.danger { color: #9e3036; background: var(--white); border-color: #e0a4a7; }
.full-width { width: 100%; }
.text-link, .back-link {
  padding: 0; border: 0; color: #0769bf; background: transparent;
  display: inline-flex; align-items: center; gap: 7px; font-size: .88rem; font-weight: 650;
  cursor: pointer; text-decoration: none;
}
.text-link:hover, .back-link:hover { text-decoration: underline; text-underline-offset: 3px; }
.section-title-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.section-title-row h2 { margin-bottom: 14px; }
.count-label, .measure-note { color: var(--muted); font-size: .75rem; }
.measure-note { margin: 13px 0 0; }
.feature-icon {
  flex: 0 0 auto; width: 58px; height: 58px; border: 1px solid #b8daf2; border-radius: 50%;
  color: var(--sky); background: #f3faff; display: grid; place-items: center;
}

/* Dashboard */
.dashboard-grid { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(380px, .92fr); gap: 16px; max-width: 1260px; margin: 0 auto; }
.next-action, .blueprint, .retrieval, .week { padding: 20px 22px; }
.next-action h1 { margin-bottom: 30px; font-size: clamp(2rem, 3.2vw, 2.75rem); }
.next-module-row { display: flex; align-items: center; gap: 20px; margin-bottom: 26px; }
.next-module-row h2 { margin-bottom: 6px; font-size: 1.75rem; }
.next-module-row p { margin: 0; color: var(--muted); }
.next-action .button-row { margin-bottom: 30px; }
.route-progress { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px; padding-top: 10px; }
.route-progress::before { content: ""; position: absolute; top: 23px; left: 8%; right: 8%; height: 2px; background: repeating-linear-gradient(90deg, var(--line-dark) 0 5px, transparent 5px 9px); }
.route-step { position: relative; display: grid; justify-items: center; gap: 6px; text-align: center; z-index: 1; }
.route-dot { width: 28px; height: 28px; border: 2px solid var(--line-dark); border-radius: 50%; background: var(--white); display: grid; place-items: center; }
.route-step.is-current .route-dot { color: var(--white); background: var(--teal); border-color: var(--teal); }
.route-step strong { font-size: .73rem; }
.route-step small { color: var(--muted); font-size: .66rem; }
.blueprint { grid-row: span 1; }
.legend { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: .68rem; white-space: nowrap; }
.legend i { width: 16px; height: 3px; margin-left: 5px; display: inline-block; }
.legend-you { background: var(--teal); }
.legend-weight { border-top: 2px dotted #8fa2b0; }
.topic-rails { display: grid; gap: 9px; }
.topic-rail { width: 100%; min-height: 37px; padding: 0; border: 0; background: transparent; display: grid; grid-template-columns: 178px 1fr 32px; gap: 10px; align-items: center; text-align: left; cursor: pointer; }
.topic-label { color: var(--ink); font-size: .77rem; }
.rail-stack { position: relative; height: 17px; display: block; }
.weight-rail { position: absolute; left: 0; bottom: 1px; height: 0; border-top: 2px dotted #93a5b1; }
.learner-rail { position: absolute; left: 0; top: 2px; min-width: 4px; max-width: 100%; height: 4px; border-radius: 999px; background: var(--teal); }
.learner-rail.sky { background: var(--sky); }
.learner-rail.amber { background: #d58a00; }
.learner-rail.coral { background: var(--coral); }
.topic-weight { color: var(--ink); font-size: .76rem; text-align: right; }
.retrieval-list { border-top: 1px solid var(--line); }
.retrieval-row { width: 100%; min-height: 64px; padding: 8px 0; border: 0; border-bottom: 1px solid var(--line); background: transparent; display: grid; grid-template-columns: 36px 1fr auto; gap: 10px; align-items: center; text-align: left; cursor: pointer; }
.retrieval-row:hover { background: var(--cloud); }
.retrieval-row > span:nth-child(2) { display: grid; gap: 2px; }
.retrieval-row strong { color: var(--ink); font-size: .82rem; }
.retrieval-row small { color: var(--muted); font-size: .7rem; }
.mini-icon { width: 32px; height: 32px; color: #b06e00; background: var(--amber-soft); border: 1px solid #f2d9a6; border-radius: 50%; display: grid; place-items: center; }
.retrieval-row:nth-child(3) .mini-icon { color: var(--teal); background: var(--teal-soft); border-color: #b9dfdc; }
.review-label { padding: 6px 9px; border: 1px solid #79b8e9; border-radius: 6px; color: #0769bf; font-size: .68rem; }
.retrieval > .text-link { margin-top: 13px; }
.week-rail { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.week-step { position: relative; min-height: 150px; padding: 8px; border: 0; background: transparent; display: grid; justify-items: center; align-content: start; gap: 7px; cursor: pointer; }
.week-step:not(:last-child)::after { content: ""; position: absolute; top: 62px; left: 72%; width: 58%; border-top: 2px dotted var(--line-dark); }
.day-label { padding: 2px 8px; color: #1c5d96; background: #dceefd; border-radius: 4px; font-size: .64rem; font-weight: 750; }
.week-step:nth-child(2) .day-label { color: #0b655f; background: #d9efed; }
.week-step:nth-child(3) .day-label { color: #8a5800; background: #fff0cc; }
.week-step:nth-child(4) .day-label { color: #9e3036; background: #ffe3e4; }
.week-icon { width: 55px; height: 55px; margin-top: 5px; border: 1px solid #c8dbe7; border-radius: 50%; color: var(--sky); background: var(--white); display: grid; place-items: center; z-index: 1; }
.week-step strong { color: var(--ink); font-size: .87rem; }
.week-step small { color: var(--muted); font-size: .72rem; }
.week-note { display: flex; align-items: center; gap: 8px; margin-top: 8px; color: var(--muted); font-size: .72rem; }
.week-note .text-link { margin-left: auto; font-size: .72rem; }

/* Study path */
.planner-strip { padding: 18px 20px; display: grid; grid-template-columns: 230px 1fr auto; gap: 24px; align-items: end; }
.planner-strip label, .planner-strip legend { color: var(--ink); font-size: .76rem; font-weight: 700; }
.planner-strip input, select, textarea, .formula-fields input { width: 100%; min-height: 44px; margin-top: 6px; padding: 8px 11px; border: 1px solid var(--line-dark); border-radius: 7px; color: var(--graphite); background: var(--white); }
.planner-strip fieldset { margin: 0; padding: 0; border: 0; }
.day-buttons { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 6px; }
.day-button { min-width: 43px; height: 44px; border: 1px solid var(--line-dark); border-radius: 7px; background: var(--white); cursor: pointer; font-size: .72rem; }
.day-button.is-active { color: #075ca8; background: var(--sky-soft); border-color: var(--sky); font-weight: 750; }
.study-path-list { margin-top: 26px; }
.path-week { position: relative; display: grid; grid-template-columns: 62px 1fr auto; gap: 20px; padding: 0 0 30px; }
.path-week:not(:last-child)::before { content: ""; position: absolute; left: 30px; top: 58px; bottom: 0; width: 2px; background: var(--line); }
.week-number { width: 62px; height: 62px; border: 2px solid var(--line-dark); border-radius: 50%; background: var(--white); display: grid; place-items: center; z-index: 1; }
.week-number span { color: var(--ink); font-weight: 800; }
.path-week.is-current .week-number { color: var(--white); background: var(--teal); border-color: var(--teal); }
.path-week.is-current .week-number span { color: var(--white); }
.path-copy { padding: 7px 0 0; }
.path-copy h2 { margin-bottom: 9px; }
.path-copy ul { margin: 0; padding-left: 19px; color: var(--muted); }
.path-status { align-self: start; margin-top: 8px; padding: 6px 10px; border-radius: 999px; color: #12655f; background: var(--teal-soft); font-size: .7rem; font-weight: 750; }
.callout { margin-top: 24px; padding: 18px 20px; border-left: 4px solid var(--sky); background: var(--mist); border-radius: 0 10px 10px 0; }
.callout strong { color: var(--ink); }
.callout p { margin: 5px 0 9px; color: var(--slate); }
.callout.warning { border-color: var(--amber); background: var(--amber-soft); }

/* Modules and lesson */
.module-topic { margin-bottom: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); overflow: hidden; scroll-margin-top: calc(var(--topbar-height) + 18px); }
.module-topic-header { padding: 20px 22px; background: linear-gradient(90deg, #fbfdff, #f1f8fc); display: grid; grid-template-columns: 1fr 145px; gap: 20px; align-items: center; }
.module-topic-header h2 { display: inline; margin: 0 0 0 10px; }
.module-topic-header p { max-width: 720px; margin: 7px 0 0; color: var(--muted); font-size: .86rem; }
.topic-number { padding: 4px 8px; border-radius: 5px; color: #0b655f; background: var(--teal-soft); font-size: .7rem; font-weight: 800; }
.topic-progress { display: grid; grid-template-columns: auto 1fr; gap: 2px 7px; align-items: baseline; }
.topic-progress strong { color: var(--ink); font-size: 1.2rem; }
.topic-progress span { color: var(--muted); font-size: .67rem; }
.progress-track { grid-column: 1 / -1; height: 5px; margin-top: 5px; border-radius: 999px; background: var(--line); overflow: hidden; }
.progress-track span { display: block; height: 100%; background: var(--teal); }
.lesson-list { border-top: 1px solid var(--line); }
.lesson-row { width: 100%; min-height: 76px; padding: 11px 18px; border: 0; border-bottom: 1px solid var(--line); background: var(--white); display: grid; grid-template-columns: 38px 1fr auto; gap: 12px; align-items: center; text-align: left; cursor: pointer; }
.lesson-row:last-child { border-bottom: 0; }
.lesson-row:hover { background: var(--cloud); }
.lesson-row.is-complete { background: #fbfefd; }
.lesson-index { width: 31px; height: 31px; border: 1px solid var(--line-dark); border-radius: 50%; color: var(--muted); display: grid; place-items: center; font-size: .66rem; }
.lesson-row.is-complete .lesson-index { color: var(--white); background: var(--teal); border-color: var(--teal); }
.lesson-copy { display: grid; gap: 3px; }
.lesson-copy strong { color: var(--ink); font-size: .9rem; }
.lesson-copy small { color: var(--muted); font-size: .72rem; }
.lesson-meta { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: .68rem; }
.lesson-meta span { padding: 4px 7px; border-radius: 5px; background: var(--mist); }
.back-link { margin-bottom: 18px; }
.lesson-header { display: flex; justify-content: space-between; gap: 30px; margin-bottom: 24px; }
.lesson-header h1 { margin: 8px 0; }
.lesson-header p { max-width: 760px; color: var(--muted); }
.lesson-domain { color: #086962; font-size: .75rem; font-weight: 750; }
.lesson-time { min-width: 110px; padding: 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--white); display: grid; grid-template-columns: auto 1fr; gap: 2px 7px; align-content: center; }
.lesson-time .icon { grid-row: 1 / 3; color: var(--sky); }
.lesson-time strong { color: var(--ink); }
.lesson-time span { color: var(--muted); font-size: .7rem; }
.lesson-layout { display: grid; grid-template-columns: minmax(0, 1fr) 270px; gap: 18px; }
.lesson-body { padding: 24px; }
.concept-stack { display: grid; gap: 12px; margin: 16px 0 28px; }
.concept-row { display: grid; grid-template-columns: 34px 1fr; gap: 12px; align-items: start; }
.concept-row > span { width: 31px; height: 31px; border-radius: 50%; color: #0c6963; background: var(--teal-soft); display: grid; place-items: center; font-weight: 800; font-size: .75rem; }
.concept-row p { margin: 3px 0 0; }
.transfer-block { padding: 20px; border: 1px solid #b9d8ee; border-radius: 10px; background: #f5fbff; display: grid; grid-template-columns: 45px 1fr; gap: 14px; }
.transfer-icon { width: 42px; height: 42px; color: var(--sky); border-radius: 50%; background: var(--white); display: grid; place-items: center; }
.transfer-block h2 { margin-bottom: 5px; }
.transfer-block p { color: var(--slate); }
.transfer-block label { display: block; color: var(--ink); font-size: .72rem; font-weight: 700; }
.transfer-block textarea { resize: vertical; }
.confidence-block { margin-top: 26px; }
.confidence-options, .certainty-buttons { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line-dark); border-radius: 8px; overflow: hidden; }
.confidence-button, .certainty-buttons button { min-height: 46px; padding: 7px; border: 0; border-right: 1px solid var(--line-dark); background: var(--white); cursor: pointer; font-size: .73rem; }
.confidence-button:last-child, .certainty-buttons button:last-child { border-right: 0; }
.confidence-button.is-active, .certainty-buttons button.is-active { color: #075ca8; background: var(--sky-soft); font-weight: 750; }
.lesson-actions { margin-top: 26px; display: flex; gap: 12px; }
.lesson-rail { display: grid; gap: 16px; align-content: start; }
.rail-section { padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.rail-section h2 { font-size: 1rem; }
.status-line { padding: 10px; border-radius: 8px; display: flex; gap: 9px; align-items: flex-start; font-size: .75rem; }
.status-line.verified { color: #0b655f; background: var(--teal-soft); }
.status-line.warning { color: #765100; background: var(--amber-soft); }
.source-mini { width: 100%; margin-top: 9px; padding: 9px 0; border: 0; border-bottom: 1px solid var(--line); background: transparent; display: grid; gap: 2px; text-align: left; cursor: pointer; }
.source-mini strong { color: var(--ink); font-size: .72rem; }
.source-mini small { color: var(--muted); font-size: .64rem; }
.rail-section ol { margin: 0; padding-left: 18px; color: var(--muted); font-size: .76rem; }

/* Scenario */
.scenario-page { max-width: 1260px; margin: 0 auto; }
.scenario-header { margin: 0 4px 22px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.scenario-header h1 { margin-bottom: 5px; }
.scenario-header p { margin: 0; color: var(--muted); }
.reasoning-route { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: .68rem; }
.reasoning-route span { width: 22px; height: 22px; border: 2px solid var(--line-dark); border-radius: 50%; background: var(--white); display: grid; place-items: center; }
.reasoning-route span.done { color: var(--white); background: var(--teal); border-color: var(--teal); }
.reasoning-route span.current { border-color: var(--sky); box-shadow: inset 0 0 0 5px var(--sky-soft); }
.reasoning-route i { width: 24px; border-top: 1px solid var(--line-dark); }
.scenario-layout { display: grid; grid-template-columns: 275px minmax(510px, 1fr) 255px; gap: 14px; }
.scenario-brief { min-height: 720px; padding: 18px 18px 0 4px; border-right: 1px solid var(--line); display: flex; flex-direction: column; }
.scenario-brief > p { color: var(--slate); line-height: 1.75; }
.source-status { margin-top: auto; padding: 16px 0 20px; border-top: 1px solid var(--line); }
.source-status > div { display: flex; gap: 10px; align-items: flex-start; color: var(--teal); }
.source-status span { display: grid; color: var(--ink); }
.source-status small { color: var(--muted); font-size: .7rem; }
.source-status .text-link { margin: 12px 0 0 32px; font-size: .76rem; }
.scenario-work { padding: 20px; }
.evidence-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 12px 0 22px; }
.evidence-item { min-height: 92px; padding: 12px 8px; border: 1px solid var(--line); border-radius: 8px; color: var(--teal); display: grid; place-items: center; gap: 8px; text-align: center; }
.evidence-item span { color: var(--ink); font-size: .73rem; line-height: 1.25; }
.answer-list { display: grid; gap: 8px; }
.answer-row { width: 100%; min-height: 58px; padding: 10px 12px; border: 1px solid var(--line-dark); border-radius: 7px; background: var(--white); display: grid; grid-template-columns: 26px 25px 1fr auto; gap: 7px; align-items: center; text-align: left; cursor: pointer; }
.answer-row:hover:not(:disabled) { border-color: #7cb6e3; background: #fbfdff; }
.answer-row.is-selected { border: 2px solid var(--sky); background: #f3f9fe; }
.answer-row.is-correct { border: 2px solid var(--teal); background: var(--teal-soft); }
.answer-row.is-wrong { border: 2px solid var(--coral); background: var(--coral-soft); }
.answer-row:disabled { color: inherit; cursor: default; }
.radio-indicator { width: 23px; height: 23px; border: 1.7px solid #8196a5; border-radius: 50%; display: grid; place-items: center; color: var(--white); }
.answer-row.is-selected .radio-indicator { border: 6px solid var(--sky); }
.answer-row.is-correct .radio-indicator { border: 0; background: var(--teal); }
.answer-row strong { color: var(--ink); }
.answer-row > span:nth-child(3) { font-size: .83rem; }
.answer-row em { padding: 5px 8px; border: 1px solid #7bcac5; border-radius: 5px; color: #086962; font-size: .62rem; font-style: normal; white-space: nowrap; }
.scenario-actions { margin-top: 14px; display: flex; align-items: center; gap: 24px; }
.certainty { margin-top: 18px; }
.certainty h2, .certainty h3 { margin-bottom: 8px; font-size: .92rem; }
.certainty-buttons { grid-template-columns: repeat(3, 1fr); }
.feedback { margin-top: 14px; padding: 13px 15px; border-left: 4px solid var(--teal); background: var(--teal-soft); }
.feedback.incorrect { border-color: var(--coral); background: var(--coral-soft); }
.feedback h3 { margin-bottom: 4px; }
.feedback p { margin: 0; font-size: .82rem; }
.reasoning-checklist { padding: 20px; display: flex; flex-direction: column; }
.reasoning-checklist label { min-height: 96px; padding: 13px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 20px 46px 1fr; gap: 8px; align-items: center; cursor: pointer; }
.reasoning-checklist input { width: 18px; height: 18px; accent-color: var(--teal); }
.check-icon { width: 43px; height: 43px; border: 1px solid #b9dde0; border-radius: 50%; color: var(--teal); display: grid; place-items: center; }
.reasoning-checklist label > span:last-child { color: var(--ink); font-size: .78rem; }
.reasoning-checklist .button { margin-top: auto; }

/* Practice */
.practice-page { max-width: 1260px; margin: 0 auto; }
.practice-header { margin: 0 4px 16px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.practice-header h1 { margin-bottom: 5px; font-size: 2rem; }
.practice-header p { margin: 0; color: var(--muted); }
.practice-controls { display: flex; align-items: flex-end; gap: 14px; }
.mode-switch { display: flex; border: 1px solid var(--line-dark); border-radius: 7px; overflow: hidden; }
.mode-switch button { min-height: 43px; padding: 0 15px; border: 0; border-right: 1px solid var(--line-dark); background: var(--white); display: flex; align-items: center; gap: 7px; cursor: pointer; font-size: .78rem; }
.mode-switch button:last-child { border: 0; }
.mode-switch button.is-active { color: #075ca8; background: var(--sky-soft); font-weight: 750; }
.topic-filter { color: var(--muted); font-size: .68rem; }
.topic-filter select { min-width: 170px; margin-top: 3px; }
.question-nav-row { min-height: 64px; padding: 9px 3px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 55px 1fr auto; gap: 16px; align-items: center; }
.question-nav-row > strong { color: var(--ink); }
.question-dots { display: flex; flex-wrap: wrap; gap: 8px; }
.question-dot { width: 35px; height: 35px; border: 1px solid var(--line-dark); border-radius: 50%; background: var(--white); display: grid; place-items: center; cursor: pointer; font-size: .68rem; }
.question-dot.is-current { color: var(--sky); border: 2px solid var(--sky); }
.question-dot.is-answered { color: var(--white); background: var(--teal); border-color: var(--teal); }
.question-dot.is-flagged { color: var(--coral); background: var(--white); border-color: var(--coral); }
.timer, .mode-note { color: var(--muted); font-size: .72rem; display: flex; align-items: center; gap: 6px; }
.timer-value { color: var(--ink); font-family: var(--mono); font-weight: 750; }
.practice-work { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(360px, .82fr); overflow: hidden; }
.question-area { min-height: 650px; padding: 20px; display: flex; flex-direction: column; }
.question-area > h2 { max-width: 760px; margin-bottom: 22px; font-size: 1.25rem; line-height: 1.35; }
.question-actions { margin-top: 14px; display: flex; justify-content: space-between; align-items: center; }
.certainty.compact { margin-top: 18px; }
.practice-footer { margin-top: auto; padding-top: 25px; display: flex; justify-content: space-between; }
.feedback-panel { padding: 20px; border-left: 1px solid var(--line); background: #fcfeff; }
.feedback-panel.is-empty { display: grid; place-items: center; }
.feedback-placeholder { max-width: 330px; color: var(--muted); text-align: center; }
.feedback-placeholder > .icon { color: var(--sky); }
.feedback-placeholder h2 { margin: 12px 0 7px; }
.feedback-placeholder small { display: block; margin-top: 12px; }
.feedback-title { display: flex; gap: 10px; color: var(--teal); }
.feedback-title.incorrect { color: var(--coral); }
.feedback-title h2 { margin-bottom: 4px; color: currentColor; }
.feedback-title p { color: var(--slate); font-size: .82rem; }
.feedback-panel section { padding: 14px 0; border-top: 1px solid var(--line); }
.feedback-panel section h3 { margin-bottom: 5px; }
.feedback-panel section p { margin: 0; color: var(--slate); font-size: .76rem; }
.distractor-list { margin: 0; }
.distractor-list div { display: grid; grid-template-columns: 20px 1fr; gap: 5px; margin: 6px 0; }
.distractor-list dt { color: var(--ink); font-weight: 800; }
.distractor-list dd { margin: 0; color: var(--muted); font-size: .72rem; }
.feedback-panel .transfer-rule { display: grid; grid-template-columns: 32px 1fr; gap: 8px; }
.transfer-rule > span { color: var(--teal); }
.calibration { margin: 10px 0; padding: 9px 11px; border: 1px solid var(--line); border-radius: 7px; display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font-size: .68rem; }
.calibration strong { color: var(--ink); }
.source-basis { display: grid; grid-template-columns: 32px 1fr; gap: 8px; }
.source-basis > span { color: var(--teal); }

/* Flashcards */
.flashcard-stage { width: min(780px, 100%); margin: 30px auto 0; }
.card-context { margin-bottom: 9px; display: flex; justify-content: space-between; color: var(--muted); font-size: .72rem; }
.card-context strong { color: var(--ink); }
.flashcard { position: relative; width: 100%; min-height: 390px; padding: 0; border: 1px solid var(--line-dark); border-radius: var(--radius-lg); background: transparent; box-shadow: var(--shadow); cursor: pointer; transform-style: preserve-3d; perspective: 1000px; }
.card-face { position: absolute; inset: 0; padding: 44px; border-radius: inherit; backface-visibility: hidden; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 22px; text-align: center; transition: transform .55s cubic-bezier(.2,.7,.2,1); }
.card-front { background: linear-gradient(145deg, var(--white), #f4faff); }
.card-back { background: linear-gradient(145deg, #eaf8f7, var(--white)); transform: rotateY(180deg); }
.flashcard.is-flipped .card-front { transform: rotateY(180deg); }
.flashcard.is-flipped .card-back { transform: rotateY(360deg); }
.card-face small { color: var(--muted); text-transform: uppercase; letter-spacing: .08em; font-size: .67rem; }
.card-face strong { max-width: 650px; color: var(--ink); font-family: var(--display); font-size: 1.45rem; line-height: 1.45; }
.card-face > span:last-child { color: var(--muted); font-size: .75rem; }
.rating-row { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 12px; border: 1px solid var(--line-dark); border-radius: 8px; overflow: hidden; }
.rating-row button { min-height: 58px; border: 0; border-right: 1px solid var(--line-dark); background: var(--white); display: grid; place-items: center; cursor: pointer; }
.rating-row button:last-child { border: 0; }
.rating-row button:hover { background: var(--sky-soft); }
.rating-row strong { color: var(--ink); font-size: .8rem; }
.rating-row span { color: var(--muted); font-size: .65rem; }
.flashcard-nav { margin-top: 14px; display: flex; justify-content: space-between; }

/* Toolkit */
.tabs { margin-bottom: 20px; border-bottom: 1px solid var(--line); display: flex; gap: 2px; overflow-x: auto; }
.tabs button { min-height: 45px; padding: 0 18px; border: 0; border-bottom: 3px solid transparent; color: var(--muted); background: transparent; cursor: pointer; white-space: nowrap; font-size: .8rem; font-weight: 700; }
.tabs button.is-active { color: #075ca8; border-bottom-color: var(--sky); }
.formula-layout { display: grid; grid-template-columns: 230px 1fr; gap: 16px; }
.formula-list { max-height: 720px; padding-right: 6px; overflow-y: auto; display: grid; gap: 4px; align-content: start; }
.formula-list button { min-height: 43px; padding: 7px 11px; border: 1px solid transparent; border-radius: 7px; background: transparent; text-align: left; cursor: pointer; font-size: .76rem; }
.formula-list button:hover { background: var(--white); }
.formula-list button.is-active { color: #075ca8; background: var(--sky-soft); border-color: #b9d9ee; font-weight: 750; }
.formula-work { padding: 24px; }
.formula-title { display: flex; gap: 15px; align-items: center; }
.formula-title h2 { margin-bottom: 5px; }
.formula-title code { display: block; color: var(--slate); font-size: .78rem; }
.formula-fields { display: grid; grid-template-columns: repeat(2, minmax(160px, 1fr)); gap: 12px; margin: 24px 0 14px; }
.formula-fields label { color: var(--ink); font-size: .72rem; font-weight: 700; }
.formula-result { margin: 18px 0; padding: 18px; border-left: 4px solid var(--teal); background: var(--teal-soft); }
.formula-result small { color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.formula-result strong { display: block; margin: 4px 0; color: var(--ink); font-size: 1.65rem; }
.formula-result p { margin: 0; }
.analysis-routine { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); }
.analysis-routine ol { columns: 2; margin-bottom: 18px; padding-left: 20px; color: var(--muted); }
.ethics-chain { max-width: 960px; }
.chain-intro { padding: 20px; display: flex; gap: 16px; align-items: center; }
.chain-intro h2 { margin-bottom: 5px; }
.chain-intro p { margin: 0; color: var(--muted); }
.chain-steps { margin-top: 18px; }
.chain-steps article { position: relative; display: grid; grid-template-columns: 46px 1fr; gap: 14px; padding-bottom: 18px; }
.chain-steps article:not(:last-child)::before { content: ""; position: absolute; left: 22px; top: 45px; bottom: 0; width: 2px; background: var(--line); }
.chain-steps article > span { width: 45px; height: 45px; border-radius: 50%; color: var(--white); background: var(--ink); display: grid; place-items: center; font-weight: 800; z-index: 1; }
.chain-steps h3 { margin: 3px 0; }
.chain-steps p { margin: 0; color: var(--muted); }
.case-warning { padding: 14px; border: 1px solid #efd79f; border-radius: 8px; color: #765100; background: var(--amber-soft); display: flex; gap: 10px; }
.case-warning p { margin: 0; }
.case-list { margin-top: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); overflow: hidden; }
.case-row { min-height: 115px; padding: 16px 18px; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 54px 1fr auto; gap: 16px; align-items: center; }
.case-row:last-child { border: 0; }
.case-year { width: 50px; height: 50px; border-radius: 50%; color: var(--ink); background: var(--mist); display: grid; place-items: center; font-size: .73rem; font-weight: 800; }
.case-row h2 { margin-bottom: 4px; font-size: 1rem; }
.case-row p { margin-bottom: 3px; font-size: .79rem; }
.case-row small { color: var(--muted); font-size: .68rem; }
.planner-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.planner-grid article { padding: 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--white); }
.planner-grid article > span { color: var(--sky); font-size: .68rem; font-weight: 800; text-transform: uppercase; }
.planner-grid h2 { margin: 4px 0 9px; }
.planner-grid ul { margin: 0; padding-left: 17px; color: var(--muted); font-size: .78rem; }
.data-tool { padding: 24px; }
.data-summary { display: grid; grid-template-columns: repeat(4, 1fr); margin: 20px 0; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.data-summary > div { min-height: 92px; padding: 14px; border-right: 1px solid var(--line); display: grid; place-items: center; align-content: center; }
.data-summary > div:last-child { border: 0; }
.data-summary strong { color: var(--ink); font-size: 1.55rem; }
.data-summary span { color: var(--muted); font-size: .68rem; }
.reset-warning { color: #9e3036; font-size: .75rem; }

/* Sources */
.sponsor-notice { margin-bottom: 16px; padding: 20px; border: 1px solid #b8daf2; border-left: 4px solid var(--sky); border-radius: var(--radius); background: linear-gradient(135deg, #f7fcff, #eaf6fd); }
.sponsor-notice h2 { margin-bottom: 7px; }
.sponsor-notice p { margin: 0; color: var(--slate); font-size: .9rem; }
.notice-panel { padding: 20px; border-left: 4px solid var(--ink); background: var(--white); box-shadow: var(--shadow); }
.notice-panel h2 { margin-bottom: 7px; }
.notice-panel p { margin-bottom: 8px; color: var(--slate); font-size: .85rem; }
.source-table-wrap { margin-top: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); overflow-x: auto; }
.source-table { width: 100%; border-collapse: collapse; min-width: 850px; }
.source-table th { padding: 12px 14px; color: var(--muted); background: var(--mist); text-align: left; font-size: .66rem; text-transform: uppercase; letter-spacing: .05em; }
.source-table td { padding: 14px; border-top: 1px solid var(--line); vertical-align: top; font-size: .76rem; }
.source-table td:first-child { min-width: 220px; }
.source-table td:nth-child(3) { min-width: 260px; }
.source-table strong, .source-table small { display: block; }
.source-table strong { color: var(--ink); }
.source-table small { margin-top: 3px; color: var(--muted); font-size: .65rem; }
.source-table code { display: block; max-width: 290px; white-space: normal; overflow-wrap: anywhere; font-size: .64rem; }
.source-table a { display: inline-flex; align-items: center; gap: 5px; }
.source-type { display: inline-block; padding: 3px 6px; border-radius: 4px; color: #0b655f; background: var(--teal-soft); font-size: .65rem; font-weight: 750; }
.boundary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 20px; }
.boundary-grid article { padding: 17px; border: 1px solid var(--line); border-radius: 9px; background: var(--white); }
.boundary-grid h2 { font-size: 1rem; }
.boundary-grid p { margin: 0; color: var(--muted); font-size: .76rem; }

.toast-region { position: fixed; right: 24px; bottom: 24px; z-index: 100; max-width: 330px; padding: 12px 16px; border-radius: 8px; color: var(--white); background: var(--ink); box-shadow: 0 12px 28px rgb(0 0 0 / 24%); opacity: 0; transform: translateY(10px); pointer-events: none; transition: opacity .2s ease, transform .2s ease; }
.toast-region.is-visible { opacity: 1; transform: translateY(0); }

/* Focus and contrast */
.focus-mode .sidebar, .focus-mode .topbar .planner-label, .focus-mode .sidebar-footer { display: none; }
.focus-mode .app-body { width: 100%; margin-left: 0; }
.focus-mode .main-content { max-width: 1120px; margin: 0 auto; }
.high-contrast {
  --cloud: #fff;
  --white: #fff;
  --graphite: #000;
  --ink: #00182d;
  --muted: #344652;
  --line: #8aa0ae;
  --line-dark: #536a78;
  --sky: #005fae;
  --teal: #006b64;
  --amber: #b56f00;
  --coral: #b4212a;
}
.high-contrast .panel, .high-contrast .module-topic, .high-contrast .source-table-wrap { border-width: 2px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

@media (max-width: 1160px) {
  .dashboard-grid { grid-template-columns: 1fr; }
  .blueprint { grid-row: auto; }
  .scenario-layout { grid-template-columns: 235px 1fr; }
  .reasoning-checklist { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 18px; }
  .reasoning-checklist h2 { grid-column: 1 / -1; }
  .reasoning-checklist label { min-height: 76px; }
  .reasoning-checklist .button { grid-column: 1 / -1; margin-top: 15px; }
  .practice-work { grid-template-columns: 1fr; }
  .feedback-panel { border: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 900px) {
  :root { --sidebar-width: 0px; }
  .app-body { width: 100%; margin-left: 0; }
  .sidebar { width: 270px; transform: translateX(-105%); transition: transform .22s ease; box-shadow: 10px 0 35px rgb(0 0 0 / 28%); }
  .sidebar.is-open { transform: translateX(0); }
  .mobile-close, .mobile-menu { display: inline-grid !important; }
  .mobile-close { color: var(--white); }
  .nav-scrim { position: fixed; inset: 0; z-index: 25; border: 0; background: rgb(4 19 31 / 55%); }
  .nav-scrim.is-visible { display: block; }
  .topbar { padding: 0 18px; justify-content: flex-start; gap: 12px; }
  .planner-label { margin-left: auto; }
  .tool-label, .tool-divider { display: none; }
  .access-tools { gap: 3px; }
  .main-content { padding: 22px 18px 38px; }
  .scenario-header, .practice-header { align-items: flex-start; flex-direction: column; }
  .reasoning-route { width: 100%; overflow-x: auto; padding-bottom: 4px; }
  .scenario-layout { grid-template-columns: 1fr; }
  .scenario-brief { min-height: auto; padding: 0 0 18px; border-right: 0; border-bottom: 1px solid var(--line); }
  .source-status { margin-top: 18px; }
  .reasoning-checklist { grid-column: auto; grid-template-columns: repeat(2, 1fr); }
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-rail { grid-template-columns: repeat(2, 1fr); }
  .planner-strip { grid-template-columns: 1fr; align-items: start; }
  .formula-layout { grid-template-columns: 1fr; }
  .formula-list { grid-template-columns: repeat(3, 1fr); max-height: none; }
  .formula-list button { text-align: center; }
  .boundary-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  h1 { font-size: 2rem; }
  .topbar { height: 66px; padding: 0 10px; }
  .access-button { width: 34px; height: 34px; }
  .planner-label { display: none; }
  .main-content { padding: 18px 12px 30px; }
  .next-action, .blueprint, .retrieval, .week { padding: 17px; }
  .next-action h1 { font-size: 2rem; margin-bottom: 22px; }
  .next-module-row { align-items: flex-start; }
  .next-module-row h2 { font-size: 1.35rem; }
  .route-progress { grid-template-columns: repeat(5, minmax(56px, 1fr)); overflow-x: auto; padding-bottom: 10px; }
  .topic-rail { grid-template-columns: 128px 1fr 30px; }
  .topic-label { font-size: .68rem; }
  .week-rail { grid-template-columns: repeat(2, 1fr); }
  .week-step:nth-child(2)::after { display: none; }
  .week-note { align-items: flex-start; flex-wrap: wrap; }
  .week-note .text-link { margin-left: 25px; }
  .split-header, .lesson-header { align-items: flex-start; flex-direction: column; }
  .header-stat { text-align: left; }
  .planner-strip { padding: 16px; }
  .path-week { grid-template-columns: 46px 1fr; gap: 13px; }
  .week-number { width: 46px; height: 46px; }
  .path-week:not(:last-child)::before { left: 22px; top: 45px; }
  .path-status { grid-column: 2; justify-self: start; margin-top: 0; }
  .module-topic-header { grid-template-columns: 1fr; }
  .module-topic-header h2 { display: block; margin: 8px 0 0; }
  .topic-progress { width: 150px; }
  .lesson-row { grid-template-columns: 34px 1fr; }
  .lesson-meta { grid-column: 2; justify-content: flex-start; }
  .lesson-body { padding: 18px; }
  .transfer-block { grid-template-columns: 1fr; }
  .confidence-options { grid-template-columns: 1fr 1fr; }
  .confidence-button:nth-child(2) { border-right: 0; }
  .confidence-button:nth-child(-n+2) { border-bottom: 1px solid var(--line-dark); }
  .lesson-actions { flex-direction: column; }
  .lesson-rail { grid-template-columns: 1fr; }
  .scenario-work { padding: 16px; }
  .evidence-grid { grid-template-columns: 1fr 1fr; }
  .answer-row { grid-template-columns: 24px 23px 1fr; }
  .answer-row em { grid-column: 3; justify-self: start; }
  .scenario-actions { align-items: flex-start; flex-direction: column; gap: 12px; }
  .reasoning-checklist { grid-template-columns: 1fr; }
  .practice-controls { width: 100%; align-items: stretch; flex-direction: column; }
  .mode-switch button { flex: 1; justify-content: center; }
  .topic-filter select { width: 100%; }
  .question-nav-row { grid-template-columns: 1fr; }
  .question-dots { max-height: 85px; overflow-y: auto; }
  .question-area { min-height: 620px; padding: 16px; }
  .question-actions { align-items: stretch; flex-direction: column-reverse; gap: 12px; }
  .question-actions .button { width: 100%; }
  .practice-footer { gap: 8px; }
  .practice-footer .button { padding: 0 10px; font-size: .72rem; }
  .calibration { flex-direction: column; }
  .flashcard { min-height: 430px; }
  .card-face { padding: 28px 22px; }
  .card-face strong { font-size: 1.16rem; }
  .rating-row { grid-template-columns: 1fr 1fr; }
  .rating-row button:nth-child(2) { border-right: 0; }
  .rating-row button:nth-child(-n+2) { border-bottom: 1px solid var(--line-dark); }
  .formula-list { grid-template-columns: 1fr 1fr; }
  .formula-work { padding: 18px; }
  .formula-title { align-items: flex-start; }
  .formula-fields { grid-template-columns: 1fr; }
  .analysis-routine ol { columns: 1; }
  .case-row { grid-template-columns: 46px 1fr; }
  .case-row .button { grid-column: 2; justify-self: start; }
  .planner-grid, .data-summary { grid-template-columns: 1fr; }
  .data-summary > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .data-summary > div:last-child { border-bottom: 0; }
  .toast-region { left: 12px; right: 12px; bottom: 12px; }
}