:root {
  color-scheme: light;
  --ink: #102033;
  --muted: #607086;
  --line: #dbe7f2;
  --aqua: #06a9c7;
  --blue: #3659c9;
  --sun: #ffc857;
  --green: #177553;
  --pale: #f3fafc;
  --code: #102033;
  --panel: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #f7fbfd;
  font: 16px/1.65 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: #05758e;
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--blue);
}

.page {
  width: min(1160px, calc(100% - 32px));
  margin: auto;
}

/* —— Hero —— */
.hero {
  padding: 48px 0 40px;
  background:
    radial-gradient(circle at 85% 20%, rgba(54, 89, 201, 0.14), transparent 29%),
    linear-gradient(125deg, #fff8e5, #eafbfe 58%, #f0f3ff);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: block;
}

.hero-copy {
  max-width: 900px;
}

.hero-art {
  display: none !important;
}

.eyebrow {
  margin: 0 0 8px;
  color: #05758e;
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 900px;
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
  font-weight: 850;
  color: var(--ink);
}

.subtitle,
.lead {
  max-width: 850px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.55;
}

.callout {
  display: inline-block;
  margin: 18px 0 0;
  padding: 14px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 5px solid var(--aqua);
  border-radius: 9px;
  font-size: 0.95rem;
  box-shadow: 0 8px 24px rgba(16, 32, 51, 0.04);
}

.daily,
.phases {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 20px;
}

.chip {
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font-size: 0.8rem;
  font-weight: 850;
  color: var(--ink);
}

/* —— Sticky nav —— */
.toc {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  margin: 0;
  padding: 0;
  border-radius: 0;
  box-shadow: none;
}

.toc .page,
.toc-inner {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  padding: 12px 0;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 18px;
  flex-wrap: nowrap;
  min-width: min-content;
}

.toc-list li {
  flex-shrink: 0;
}

.toc-list a {
  color: var(--ink);
  font-weight: 800;
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
  padding: 0;
  background: none;
  border: none;
  border-radius: 0;
}

.toc-list a:hover {
  color: #05758e;
}

/* —— Main sections —— */
main.page {
  padding: 40px 0 0;
}

main.page > section.card {
  scroll-margin-top: 64px;
  margin: 0 0 48px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.section-title,
.card h2 {
  margin: 0 0 12px;
  font-size: clamp(1.45rem, 2.6vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--ink);
}

.section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--aqua);
}

.section-icon svg {
  width: 18px;
  height: 18px;
  display: block;
}

.subhead {
  margin: 24px 0 9px;
  font-size: 1.05rem;
  color: var(--ink);
  font-weight: 800;
}

.meta,
.small {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.95rem;
}

.note {
  margin: 14px 0 0;
  padding: 14px 17px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--aqua);
  border-radius: 9px;
  background: #fff;
  color: var(--ink);
  font-size: 0.92rem;
}

/* —— Checklists —— */
.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.checklist.compact {
  gap: 8px;
  margin-top: 14px;
}

.checklist li {
  margin: 0;
}

.checklist label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.checklist label:hover {
  border-color: #c5d8e8;
}

.checklist li:has(input:checked) label,
.checklist label:has(input:checked) {
  background: #eaf7f1;
  border-color: #c5e6d4;
  color: #315f50;
}

.checklist input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 3px;
  accent-color: var(--green);
  flex-shrink: 0;
}

.checklist input[type="checkbox"]:checked + span {
  color: #315f50;
}

.checklist span {
  font-size: 0.95rem;
  line-height: 1.5;
}

.checklist.compact span {
  font-size: 0.9rem;
}

/* —— Jot —— */
.jot-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 22px 0 10px;
}

.jot-head h2,
.jot-head h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
}

.btn-copy {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(16, 32, 51, 0.04);
}

.btn-copy:hover,
.btn-copy:focus-visible {
  border-color: var(--aqua);
  color: #05758e;
  outline: none;
}

.btn-copy.copied {
  color: var(--green);
  border-color: var(--green);
  background: #eaf7f1;
}

.jot {
  margin: 0;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 11px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--ink);
  white-space: pre-wrap;
  overflow-x: auto;
  box-shadow: 0 8px 24px rgba(16, 32, 51, 0.04);
}

/* —— Exam facts + FRQ —— */
.exam-facts {
  list-style: none;
  margin: 16px 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.exam-facts li {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 11px;
  font-size: 0.92rem;
  color: var(--muted);
  box-shadow: 0 12px 34px rgba(16, 32, 51, 0.05);
}

.exam-facts li strong {
  display: block;
  font-size: 1.15rem;
  color: var(--ink);
  margin-bottom: 4px;
}

.frq-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.frq-card {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 11px;
  box-shadow: 0 12px 34px rgba(16, 32, 51, 0.05);
}

.frq-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--ink);
}

.frq-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

/* —— Unit curriculum —— */
.unit-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.unit-card {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 6px solid var(--aqua);
  border-radius: 11px;
  margin: 0;
  box-shadow: 0 8px 24px rgba(16, 32, 51, 0.04);
}

.unit-grid > .unit-card:nth-child(2) {
  border-top-color: var(--blue);
}

.unit-grid > .unit-card:nth-child(3) {
  border-top-color: var(--sun);
}

.unit-grid > .unit-card:nth-child(4) {
  border-top-color: var(--green);
}

.unit-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.45rem 0.75rem;
  margin-bottom: 8px;
}

.unit-title {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  font-size: 1.1rem;
  min-width: 0;
  color: var(--ink);
}

.unit-badge {
  display: none;
}

.unit-head h3 {
  margin: 0;
  font-size: 1.1rem;
}

.pct,
.weight {
  display: inline-flex;
  padding: 4px 9px;
  border-radius: 999px;
  background: #e9f7fa;
  color: #04758b;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
}

.topic-list {
  margin: 0 0 10px;
  padding-left: 21px;
  color: var(--ink);
  font-size: 0.92rem;
}

.topic-list li {
  margin-bottom: 5px;
  color: var(--muted);
}

.topic-list code,
.frq-card code,
.resource-list code,
.trap-list code,
.session-steps code,
.cal-table code {
  padding: 2px 5px;
  border-radius: 4px;
  background: #edf2f5;
  color: var(--code);
  font-size: 0.88em;
}

.output {
  margin: 8px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.output.warn {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--sun);
  border-radius: 9px;
  background: #fff;
  color: var(--ink);
  margin-bottom: 8px;
}

/* —— Calendar table —— */
.table-wrap {
  overflow: auto;
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fff;
}

.cal-table {
  width: 100%;
  min-width: 820px;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.cal-table th,
.cal-table td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.cal-table th {
  background: #eaf7fa;
  color: var(--ink);
  font-weight: 800;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
  position: sticky;
  top: 0;
}

.cal-table tbody tr:last-child td {
  border-bottom: none;
}

.cal-table tbody tr:nth-child(even) {
  background: var(--pale);
}

.cal-table td:first-child {
  white-space: nowrap;
  font-weight: 900;
  color: #05758e;
}

/* —— Repeatable week —— */
.breakdown {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.breakdown li {
  padding: 14px;
  background: var(--pale);
  border-radius: 9px;
  border: 1px solid transparent;
  font-size: 0.92rem;
  color: var(--muted);
}

.breakdown li strong {
  color: var(--ink);
}

.target-list {
  margin: 0;
  padding-left: 21px;
  font-size: 0.95rem;
  color: var(--muted);
}

.target-list li {
  margin-bottom: 6px;
}

.target-list strong {
  color: var(--ink);
}

/* —— Resources —— */
.resource-list {
  margin: 0;
  padding-left: 21px;
  font-size: 0.95rem;
  color: var(--muted);
}

.resource-list.plain {
  list-style: disc;
}

.resource-list li {
  margin-bottom: 6px;
}

.resource-list strong {
  color: var(--ink);
}

.warn-box {
  margin: 16px 0 0;
  padding: 17px 19px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 5px solid var(--sun);
  border-radius: 9px;
  font-size: 0.92rem;
  color: var(--ink);
}

.warn-box strong {
  color: var(--ink);
}

/* —— Traps / AI —— */
.trap-list {
  margin: 0;
  padding-left: 21px;
  font-size: 0.92rem;
  color: var(--muted);
}

.trap-list li {
  margin-bottom: 6px;
}

.ai-note {
  margin: 8px 0 0;
  padding: 18px 20px;
  border-radius: 12px;
  background: linear-gradient(120deg, #e7f8fb, #fff7df);
  border: 1px solid var(--line);
  font-size: 0.95rem;
  color: var(--ink);
}

.ai-note strong {
  color: var(--ink);
}

/* —— First session —— */
.session-steps {
  margin: 0;
  padding-left: 21px;
  font-size: 0.95rem;
  color: var(--muted);
}

.session-steps li {
  margin-bottom: 12px;
}

.session-steps strong {
  color: var(--ink);
}

/* —— Footer —— */
.footer {
  margin: 48px 0 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
  text-align: left;
  line-height: 1.55;
}

.footer code {
  padding: 2px 5px;
  border-radius: 4px;
  background: #edf2f5;
  font-size: 0.85em;
  color: var(--code);
}

.footer a {
  font-weight: 700;
}

/* —— Responsive —— */
@media (max-width: 820px) {
  .exam-facts,
  .frq-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .unit-grid {
    grid-template-columns: 1fr;
  }

  .breakdown {
    grid-template-columns: 1fr 1fr;
  }

  .breakdown li:last-child:nth-child(odd) {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {
  .hero {
    padding: 32px 0 28px;
  }

  .exam-facts,
  .frq-grid,
  .breakdown {
    grid-template-columns: 1fr;
  }

  .breakdown li:last-child:nth-child(odd) {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}