:root {
  --bg: #f3efe5;
  --bg-strong: #e7e0d2;
  --panel: rgba(255, 252, 246, 0.9);
  --panel-strong: #fffaf2;
  --ink: #182029;
  --muted: #5f6a72;
  --line: rgba(24, 32, 41, 0.12);
  --line-strong: rgba(24, 32, 41, 0.22);
  --selected: #0f5d53;
  --selected-soft: rgba(15, 93, 83, 0.14);
  --available: #c46a2f;
  --available-soft: rgba(196, 106, 47, 0.12);
  --blocked: #a5a8ac;
  --blocked-soft: rgba(90, 95, 100, 0.12);
  --accent: #1e7b9c;
  --accent-soft: rgba(30, 123, 156, 0.12);
  --danger: #a64e35;
  --danger-soft: rgba(166, 78, 53, 0.12);
  --warning: #9b6423;
  --warning-soft: rgba(155, 100, 35, 0.12);
  --shadow: 0 18px 45px rgba(24, 32, 41, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --module-panel-width: 308px;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --sans: "Avenir Next", "Segoe UI", "Helvetica Neue", Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(30, 123, 156, 0.12), transparent 30%),
    radial-gradient(circle at top right, rgba(196, 106, 47, 0.12), transparent 28%),
    linear-gradient(180deg, #f9f4ea 0%, var(--bg) 100%);
}

button,
input,
select,
textarea {
  font: inherit;
}

.page-shell {
  width: min(96vw, 1920px);
  margin: 0 auto;
  padding: 28px 0 40px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(280px, 0.9fr);
  gap: 20px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.7), rgba(255, 250, 242, 0.92)),
    linear-gradient(180deg, rgba(30, 123, 156, 0.04), rgba(196, 106, 47, 0.02));
  box-shadow: var(--shadow);
}

.eyebrow,
.panel-kicker,
.toolbar-label,
.meta-label {
  margin: 0 0 8px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero h1,
.detail-panel h2,
.chart-panel h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(2.4rem, 4vw, 4rem);
  max-width: 14ch;
}

.hero-text {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--muted);
}

.hero-meta {
  display: grid;
  gap: 14px;
  align-content: end;
}

.meta-card,
.summary-card,
.chart-panel,
.timetable-panel,
.detail-panel,
.toolbar,
.footnote {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.meta-card {
  padding: 18px 20px;
  border-radius: var(--radius-lg);
}

.meta-card strong {
  display: block;
  font-size: 1.05rem;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-top: 18px;
  padding: 16px 18px;
  border-radius: var(--radius-lg);
}

.toolbar-block {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.toolbar-actions {
  margin-left: auto;
}

.segmented-control {
  display: inline-flex;
  gap: 8px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
}

.segment,
.action-button,
.module-select,
.status-pill {
  border: 0;
  border-radius: 999px;
}

.segment,
.action-button,
.module-select {
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease, border-color 180ms ease, opacity 180ms ease;
}

.segment {
  padding: 10px 14px;
  color: var(--muted);
  background: transparent;
}

.segment:hover,
.action-button:hover,
.module-select:hover {
  transform: translateY(-1px);
}

.segment.is-active {
  background: var(--ink);
  color: #fff;
}

.action-button {
  padding: 11px 16px;
  color: var(--ink);
  background: rgba(24, 32, 41, 0.06);
}

.action-button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

.action-button:disabled:hover {
  transform: none;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.summary-card {
  padding: 18px 18px 16px;
  border-radius: var(--radius-lg);
}

.summary-card strong {
  display: block;
  font-size: 1.95rem;
  line-height: 1;
  margin-bottom: 6px;
}

.summary-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.summary-breakdown {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.summary-breakdown-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1;
}

.summary-breakdown-label {
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
}

.workspace {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.chart-panel,
.detail-panel {
  border-radius: var(--radius-xl);
}

.chart-panel {
  min-width: 0;
  overflow: hidden;
  padding: 22px;
}

.timetable-panel {
  display: grid;
  min-width: 0;
  overflow: hidden;
  gap: 16px;
  padding: 18px;
  border-radius: var(--radius-xl);
}

.timetable-header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.timetable-year-picker {
  display: grid;
  gap: 6px;
}

.timetable-year-select {
  min-width: 140px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.74);
}

.timetable-fallback-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.68);
  color: var(--ink);
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.timetable-fallback-link:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.88);
}

.timetable-fallback-note {
  margin: -8px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.timetable-status,
.timetable-grid-panel {
  display: block;
}

.timetable-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.timetable-message-card,
.timetable-clash-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(249, 243, 234, 0.92)),
    linear-gradient(135deg, rgba(30, 123, 156, 0.03), rgba(196, 106, 47, 0.03));
}

.timetable-message-card.is-quiet {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.76), rgba(248, 243, 234, 0.86)),
    linear-gradient(135deg, rgba(30, 123, 156, 0.02), rgba(196, 106, 47, 0.02));
}

.timetable-message-card.is-error {
  border-color: rgba(166, 78, 53, 0.24);
  background:
    linear-gradient(180deg, rgba(255, 249, 246, 0.94), rgba(252, 240, 235, 0.94)),
    linear-gradient(135deg, rgba(166, 78, 53, 0.06), transparent 62%);
}

.timetable-message-card p {
  margin: 0;
  line-height: 1.6;
  color: var(--muted);
}

.timetable-message-card strong {
  color: var(--ink);
}

.timetable-summary-card strong {
  margin-bottom: 10px;
}

.timetable-summary-card.is-hard strong {
  color: var(--danger);
}

.timetable-clash-panel {
  display: block;
}

.timetable-clash-card-hard {
  border-color: rgba(166, 78, 53, 0.2);
}

.timetable-clash-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.timetable-clash-head h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.35rem;
}

.timetable-clash-count {
  min-width: 42px;
  justify-content: center;
  font-weight: 700;
}

.timetable-clash-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timetable-clash-item {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.7);
}

.timetable-clash-item strong {
  display: block;
  margin-bottom: 4px;
}

.timetable-clash-item p,
.timetable-clash-empty {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.timetable-grid-shell {
  overflow-x: auto;
  padding-bottom: 4px;
}

.timetable-week-controls {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.timetable-week-copy h3,
.timetable-week-copy p {
  margin: 0;
}

.timetable-week-copy h3 {
  font-family: var(--serif);
  font-size: 1.35rem;
}

.timetable-week-copy p {
  margin-top: 4px;
  color: var(--muted);
  line-height: 1.55;
}

.timetable-week-actions {
  display: inline-flex;
  gap: 10px;
  flex-wrap: wrap;
}

.timetable-week-button {
  min-width: 136px;
}

.timetable-week-grid {
  --slot-height: 24px;
  display: grid;
  grid-template-columns: 74px repeat(var(--day-count), minmax(170px, 1fr));
  grid-template-rows: 44px repeat(var(--slot-count), var(--slot-height));
  gap: 0 10px;
  min-width: calc(74px + var(--day-count) * 170px);
}

.timetable-grid-corner {
  grid-column: 1;
  grid-row: 1;
}

.timetable-day-header {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.82);
  font-weight: 700;
}

.timetable-time-label {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding-right: 8px;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1;
  transform: translateY(-0.55rem);
}

.timetable-day-column {
  border: 1px solid var(--line);
  border-radius: 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(247, 242, 233, 0.86)),
    repeating-linear-gradient(
      180deg,
      transparent 0,
      transparent calc(var(--slot-height) - 1px),
      rgba(24, 32, 41, 0.08) calc(var(--slot-height) - 1px),
      rgba(24, 32, 41, 0.08) var(--slot-height)
    );
}

.timetable-session-card {
  justify-self: start;
  align-self: stretch;
  width: calc((100% - (var(--lane-count) - 1) * 8px) / var(--lane-count));
  margin-left: calc(var(--lane-index) * (((100% - (var(--lane-count) - 1) * 8px) / var(--lane-count)) + 8px));
  padding: 10px 10px 8px;
  border: 1px solid rgba(15, 93, 83, 0.16);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(233, 247, 244, 0.96)),
    linear-gradient(135deg, rgba(15, 93, 83, 0.1), transparent 60%);
  box-shadow: 0 10px 20px rgba(24, 32, 41, 0.08);
  display: grid;
  align-content: start;
  gap: 4px;
  min-height: 100%;
  z-index: 2;
  overflow: hidden;
}

.timetable-session-card.is-subgroup {
  border-color: rgba(155, 100, 35, 0.18);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(250, 241, 230, 0.96)),
    linear-gradient(135deg, rgba(155, 100, 35, 0.1), transparent 60%);
}

.timetable-session-card.is-clashing {
  border-color: rgba(166, 78, 53, 0.44);
  background:
    linear-gradient(180deg, rgba(255, 252, 250, 0.94), rgba(255, 232, 225, 0.98)),
    linear-gradient(135deg, rgba(166, 78, 53, 0.16), transparent 60%);
  box-shadow: 0 14px 24px rgba(166, 78, 53, 0.18);
}

.timetable-session-card.is-online {
  border-style: dashed;
}

.timetable-session-code,
.timetable-session-flag,
.timetable-session-meta,
.timetable-session-location,
.timetable-session-time {
  margin: 0;
}

.timetable-session-code {
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.timetable-session-flag {
  justify-self: start;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(166, 78, 53, 0.14);
  color: var(--danger);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timetable-session-card h4 {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.25;
}

.timetable-session-time {
  font-weight: 700;
}

.timetable-session-meta,
.timetable-session-location {
  color: var(--muted);
  font-size: 0.79rem;
  line-height: 1.45;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.year-overview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.year-overview-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(255, 249, 241, 0.9)),
    linear-gradient(135deg, rgba(30, 123, 156, 0.03), rgba(196, 106, 47, 0.03));
}

.year-overview-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 2px;
}

.year-overview-head > div {
  display: grid;
  gap: 4px;
}

.year-overview-head h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.45rem;
}

.year-overview-badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--muted);
  font-size: 0.82rem;
  white-space: nowrap;
}

.year-overview-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.year-overview-list {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.year-overview-list li + li {
  margin-top: 8px;
}

.load-status-card {
  grid-column: 1 / -1;
}

.load-status-card p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--muted);
}

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  display: inline-block;
}

.swatch-selected {
  background: var(--selected);
}

.swatch-available {
  background: var(--available);
}

.swatch-blocked {
  background: var(--blocked);
}

.flowchart-board {
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 18px 14px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top left, rgba(30, 123, 156, 0.06), transparent 30%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.66), rgba(243, 239, 229, 0.52));
}

.flowchart-canvas {
  position: relative;
  width: 100%;
  min-width: 0;
  max-width: 100%;
}

.connector-layer {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  pointer-events: none;
  overflow: visible;
  z-index: 2;
}

.connector-anchor-layer {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  pointer-events: none;
  overflow: visible;
  z-index: 5;
}

.year-columns {
  position: relative;
  display: grid;
  width: 100%;
  grid-template-columns: repeat(3, 352px);
  justify-content: space-between;
  gap: 128px;
  min-height: 700px;
  align-items: start;
}

.year-column {
  position: relative;
  padding: 0;
}

.year-column::before {
  display: none;
}

.year-header {
  position: relative;
  z-index: 3;
  display: grid;
  gap: 4px;
  margin-bottom: 20px;
  padding: 0 4px;
  text-align: center;
}

.year-header h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.8rem;
  line-height: 1.04;
}

.rule-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.rule-chip,
.term-chip,
.minor-chip,
.detail-list li {
  color: var(--muted);
}

.rule-chip,
.term-chip,
.detail-pill,
.minor-chip,
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  font-size: 0.78rem;
}

.group-title {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  margin: 0;
  border: 1px solid var(--group-tab-border);
  border-radius: 999px;
  background: var(--group-tab-bg);
  box-shadow: 0 10px 20px rgba(24, 32, 41, 0.06);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--group-title-color);
}

.group-block {
  --group-accent: rgba(24, 32, 41, 0.22);
  --group-fill-start: rgba(255, 255, 255, 0.86);
  --group-fill-end: rgba(249, 245, 238, 0.88);
  --group-tab-bg: rgba(255, 255, 255, 0.92);
  --group-tab-border: rgba(24, 32, 41, 0.12);
  --group-title-color: var(--ink);
  --group-border: rgba(24, 32, 41, 0.08);
  position: relative;
  padding: 12px;
  border: 1px solid var(--group-border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, var(--group-fill-start), var(--group-fill-end)),
    linear-gradient(135deg, rgba(255, 255, 255, 0.22), transparent 62%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.72),
    0 12px 24px rgba(24, 32, 41, 0.05);
  backdrop-filter: none;
}

.group-block.theme-natsci {
  --group-accent: rgba(30, 123, 156, 0.42);
  --group-fill-start: rgba(244, 250, 252, 0.96);
  --group-fill-end: rgba(236, 246, 248, 0.86);
  --group-tab-bg: rgba(234, 246, 249, 0.98);
  --group-tab-border: rgba(30, 123, 156, 0.24);
  --group-title-color: rgb(22, 95, 121);
  --group-border: rgba(30, 123, 156, 0.16);
}

.group-block.theme-core {
  --group-accent: rgba(86, 96, 112, 0.34);
  --group-fill-start: rgba(248, 249, 251, 0.95);
  --group-fill-end: rgba(240, 243, 247, 0.88);
  --group-tab-bg: rgba(241, 244, 248, 0.98);
  --group-tab-border: rgba(86, 96, 112, 0.2);
  --group-title-color: rgb(68, 77, 92);
  --group-border: rgba(86, 96, 112, 0.14);
}

.group-block.theme-physics {
  --group-accent: rgba(196, 106, 47, 0.44);
  --group-fill-start: rgba(252, 247, 242, 0.96);
  --group-fill-end: rgba(250, 240, 231, 0.87);
  --group-tab-bg: rgba(252, 241, 231, 0.98);
  --group-tab-border: rgba(196, 106, 47, 0.24);
  --group-title-color: rgb(140, 79, 37);
  --group-border: rgba(196, 106, 47, 0.16);
}

.group-block.theme-maths {
  --group-accent: rgba(15, 93, 83, 0.4);
  --group-fill-start: rgba(241, 250, 247, 0.96);
  --group-fill-end: rgba(232, 246, 242, 0.87);
  --group-tab-bg: rgba(231, 245, 241, 0.98);
  --group-tab-border: rgba(15, 93, 83, 0.22);
  --group-title-color: rgb(18, 92, 82);
  --group-border: rgba(15, 93, 83, 0.15);
}

.group-block.theme-research {
  --group-accent: rgba(133, 86, 46, 0.38);
  --group-fill-start: rgba(251, 247, 242, 0.96);
  --group-fill-end: rgba(246, 238, 229, 0.88);
  --group-tab-bg: rgba(247, 239, 230, 0.98);
  --group-tab-border: rgba(133, 86, 46, 0.22);
  --group-title-color: rgb(115, 75, 42);
  --group-border: rgba(133, 86, 46, 0.15);
}

.group-block + .group-block {
  margin-top: 18px;
}

.group-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.group-header-copy {
  min-width: 0;
}

.group-toggle {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 8px 12px;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.group-toggle:hover {
  transform: translateY(-1px);
}

.group-toggle.is-active {
  background: rgba(24, 32, 41, 0.88);
  border-color: rgba(24, 32, 41, 0.88);
  color: #fff;
}

.group-summary,
.module-section-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.group-summary {
  margin-top: 6px;
}

.group-header,
.module-section,
.group-stack-preview {
  position: relative;
  z-index: 3;
}

.module-section + .module-section {
  margin-top: 12px;
}

.module-section-label {
  margin-bottom: 8px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.module-section-standalone .module-section-label {
  color: rgba(95, 106, 114, 0.84);
}

.module-section-linked,
.module-section-core,
.module-section-standalone {
  position: relative;
  width: 100%;
  padding-inline-end: 0;
}

.module-list {
  display: grid;
  gap: 10px;
  width: 100%;
  justify-items: stretch;
}

.module-list-standalone {
  gap: 8px;
}

.module-list > * {
  width: 100%;
}

.module-list > .choice-set {
  width: 100%;
}

.choice-set {
  position: relative;
  padding: 12px 14px;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.76), rgba(255, 249, 241, 0.66)),
    linear-gradient(135deg, rgba(30, 123, 156, 0.03), rgba(196, 106, 47, 0.03));
}

.choice-set::before,
.choice-set::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 18px;
  border: 2px solid rgba(30, 123, 156, 0.28);
  pointer-events: none;
}

.choice-set::before {
  left: 0;
  border-right: 0;
  border-radius: 18px 0 0 18px;
}

.choice-set::after {
  right: 0;
  border-left: 0;
  border-radius: 0 18px 18px 0;
}

.choice-set > * {
  position: relative;
  z-index: 3;
}

.choice-set-header {
  margin-bottom: 10px;
  padding-inline: 6px;
}

.choice-set-label {
  display: inline-flex;
  align-items: center;
  padding: 5px 9px;
  border: 1px solid rgba(30, 123, 156, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.choice-set-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  width: 100%;
  align-items: start;
  justify-items: stretch;
}

.choice-set-cards > .module-card {
  width: 100%;
}

.group-stack-preview {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: 16px;
  padding: 14px;
  border: 1px dashed rgba(24, 32, 41, 0.18);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.68);
}

.group-stack-cards {
  position: relative;
  min-height: 108px;
}

.group-stack-summary {
  display: grid;
  align-content: center;
  gap: 10px;
}

.group-stack-count,
.group-stack-note,
.stacked-preview-code,
.stacked-preview-title {
  margin: 0;
}

.group-stack-count {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--ink);
}

.group-stack-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.group-stack-note {
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.45;
}

.stacked-preview-card {
  position: absolute;
  inset-inline: 0 26px;
  top: calc(var(--stack-index) * 16px);
  z-index: var(--stack-depth);
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 10px 24px rgba(24, 32, 41, 0.08);
}

.stacked-preview-card.is-selected {
  background: linear-gradient(180deg, rgba(15, 93, 83, 0.15), rgba(255, 255, 255, 0.96));
  border-color: rgba(15, 93, 83, 0.32);
}

.stacked-preview-card.is-available {
  background: linear-gradient(180deg, rgba(196, 106, 47, 0.1), rgba(255, 255, 255, 0.96));
  border-color: rgba(196, 106, 47, 0.24);
}

.stacked-preview-card.is-blocked {
  background: linear-gradient(180deg, rgba(241, 239, 235, 0.96), rgba(252, 250, 246, 0.96));
  border-color: rgba(90, 95, 100, 0.14);
}

.stacked-preview-card.is-active {
  box-shadow: 0 12px 28px rgba(30, 123, 156, 0.18);
}

.stacked-preview-code {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.stacked-preview-title {
  margin-top: 4px;
  font-size: 0.86rem;
  line-height: 1.28;
}

.module-card {
  position: relative;
  z-index: 3;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.8);
  overflow: visible;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background-color 180ms ease, opacity 180ms ease;
}

.module-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(24, 32, 41, 0.07);
}

.module-card.is-active {
  border-color: rgba(30, 123, 156, 0.48);
  box-shadow: 0 14px 26px rgba(30, 123, 156, 0.14);
  transform: translateY(-1px);
}

.module-card.is-selected {
  background: linear-gradient(180deg, rgba(15, 93, 83, 0.15), rgba(255, 255, 255, 0.92));
  border-color: rgba(15, 93, 83, 0.42);
}

.module-card.is-available {
  background: linear-gradient(180deg, rgba(196, 106, 47, 0.1), rgba(255, 255, 255, 0.92));
  border-color: rgba(196, 106, 47, 0.26);
}

.module-card.is-blocked {
  background: linear-gradient(180deg, rgba(241, 239, 235, 0.96), rgba(252, 250, 246, 0.94));
  border-color: rgba(90, 95, 100, 0.16);
  opacity: 0.76;
}

.module-card.is-hidden {
  display: none;
}

.module-card.is-related {
  border-color: rgba(30, 123, 156, 0.28);
  box-shadow: 0 10px 22px rgba(24, 32, 41, 0.06);
}

.module-card.is-related-upstream {
  background: linear-gradient(180deg, rgba(30, 123, 156, 0.08), rgba(255, 255, 255, 0.9));
}

.module-card.is-related-downstream {
  background: linear-gradient(180deg, rgba(196, 106, 47, 0.07), rgba(255, 255, 255, 0.9));
}

.module-card.is-related-choice {
  background: linear-gradient(180deg, rgba(30, 123, 156, 0.09), rgba(255, 255, 255, 0.9));
}

.module-card.is-related-route {
  background: linear-gradient(180deg, rgba(30, 123, 156, 0.05), rgba(255, 255, 255, 0.9));
}

.module-head,
.detail-head,
.detail-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: flex-start;
}

.module-copy {
  min-width: 0;
}

.module-code {
  margin: 0;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.module-title {
  margin: 4px 0 0;
  font-size: 0.94rem;
  line-height: 1.28;
}

.module-node {
  display: grid;
  gap: 7px;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  appearance: none;
}

.module-node:focus-visible {
  outline: 2px solid rgba(30, 123, 156, 0.45);
  outline-offset: 6px;
  border-radius: var(--radius-sm);
}

.term-chip {
  white-space: nowrap;
}

.module-prereqs {
  margin: 0;
  max-width: 100%;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.66rem;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.module-meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.module-details-button {
  padding: 6px 10px;
  border: 1px solid rgba(24, 32, 41, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.module-details-button:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.9);
}

.minor-chip {
  font-size: 0.74rem;
}

.status-pill {
  font-weight: 700;
  color: #fff;
}

.status-pill.selected {
  background: var(--selected);
}

.status-pill.available {
  background: var(--available);
}

.status-pill.blocked {
  background: var(--blocked);
}

.module-select {
  margin-inline-start: auto;
  padding: 6px 10px;
  font-weight: 700;
  font-size: 0.78rem;
  color: #fff;
  background: var(--available);
}

.module-select.module-select-selected {
  background: var(--selected);
}

.module-select.module-select-available {
  background: var(--available);
}

.module-select.module-select-blocked {
  background: var(--blocked);
}

.module-select.module-select-core {
  background: var(--selected);
}

.module-select.is-disabled {
  cursor: not-allowed;
  opacity: 0.82;
}

.module-select.module-select-core.is-disabled {
  cursor: default;
  opacity: 1;
}

.module-select:disabled:hover {
  transform: none;
}

.detail-modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
}

.detail-modal.is-hidden {
  display: none;
}

.detail-modal-backdrop {
  display: none;
}

.detail-panel {
  padding: 22px;
  min-height: 280px;
}

.detail-panel-modal {
  position: fixed;
  top: 22px;
  right: 22px;
  bottom: 22px;
  z-index: 1;
  width: min(540px, calc(100vw - 44px));
  max-height: none;
  overflow: auto;
  pointer-events: auto;
  border-radius: var(--radius-xl);
  box-shadow: 0 22px 52px rgba(24, 32, 41, 0.18);
  background:
    linear-gradient(180deg, rgba(255, 252, 246, 0.98), rgba(250, 246, 239, 0.96)),
    linear-gradient(135deg, rgba(30, 123, 156, 0.04), rgba(196, 106, 47, 0.03));
}

.detail-close {
  position: absolute;
  top: 16px;
  right: 16px;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid rgba(24, 32, 41, 0.12);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.detail-close:hover {
  background: rgba(255, 255, 255, 1);
  border-color: rgba(24, 32, 41, 0.2);
}

.detail-head {
  padding-inline-end: 56px;
}

.detail-empty p {
  max-width: 56ch;
  color: var(--muted);
  line-height: 1.7;
}

.detail-code {
  margin: 0 0 8px;
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.detail-text {
  margin: 14px 0 0;
  max-width: 92ch;
  color: var(--muted);
  line-height: 1.72;
}

.detail-richtext {
  white-space: pre-line;
}

.detail-meta {
  margin-top: 18px;
  flex-wrap: wrap;
}

.detail-pill {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.84);
  text-decoration: none;
}

.detail-link:hover {
  background: rgba(30, 123, 156, 0.14);
}

.detail-section {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.detail-section h3 {
  margin: 0 0 10px;
  font-size: 0.96rem;
  letter-spacing: 0.01em;
}

.detail-list {
  margin: 0;
  padding-left: 18px;
}

.detail-list li + li {
  margin-top: 8px;
}

.blocked-note {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: rgba(165, 168, 172, 0.1);
  color: var(--muted);
  line-height: 1.55;
}

.connector-anchor {
  fill: var(--available);
  stroke: rgba(255, 255, 255, 0.96);
  stroke-width: 2.4;
  paint-order: stroke;
  filter: drop-shadow(0 0 0.8px rgba(24, 32, 41, 0.16));
  pointer-events: none;
}

.connector-anchor.is-selected {
  fill: var(--selected);
}

.connector-anchor.is-available {
  fill: var(--available);
}

.connector-anchor.is-blocked {
  fill: var(--blocked);
}

.connector-anchor.is-active {
  fill: var(--accent);
}

.connector-path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.8;
  opacity: 0.46;
  transition: opacity 180ms ease, stroke-width 180ms ease, stroke 180ms ease;
}

.connector-path.is-selected {
  stroke: rgba(15, 93, 83, 0.6);
}

.connector-path.is-available {
  stroke: rgba(196, 106, 47, 0.55);
}

.connector-path.is-blocked {
  stroke: rgba(165, 168, 172, 0.42);
  stroke-dasharray: 5 7;
}

.connector-path.is-active {
  stroke-width: 4;
  opacity: 0.95;
}

.connector-path.is-route {
  opacity: 0.7;
}

.connector-path.is-muted {
  opacity: 0.18;
}

.footnote {
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: var(--radius-lg);
}

.footnote p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.debug-drawer {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 40;
  width: min(560px, calc(100vw - 32px));
  max-height: min(62vh, 720px);
  overflow: auto;
  padding: 18px;
  border: 1px solid rgba(24, 32, 41, 0.18);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 252, 246, 0.98), rgba(249, 245, 238, 0.97)),
    linear-gradient(135deg, rgba(30, 123, 156, 0.04), rgba(196, 106, 47, 0.03));
  box-shadow: 0 18px 45px rgba(24, 32, 41, 0.18);
}

.debug-drawer-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.debug-drawer-header h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1.1;
}

.debug-drawer-hint {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.debug-drawer-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.debug-drawer-button {
  padding: 9px 14px;
}

.debug-summary {
  display: grid;
  gap: 8px;
  padding: 12px 14px;
  border: 1px solid rgba(24, 32, 41, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.debug-summary p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.debug-log {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.debug-empty {
  margin: 0;
  padding: 14px;
  border: 1px dashed rgba(24, 32, 41, 0.18);
  border-radius: 8px;
  color: var(--muted);
  line-height: 1.6;
}

.debug-log-entry {
  padding: 14px;
  border: 1px solid rgba(24, 32, 41, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
}

.debug-log-entry.is-error {
  border-color: rgba(166, 78, 53, 0.24);
  background:
    linear-gradient(180deg, rgba(255, 249, 246, 0.94), rgba(252, 240, 235, 0.94)),
    linear-gradient(135deg, rgba(166, 78, 53, 0.05), transparent 62%);
}

.debug-log-entry.is-info {
  border-color: rgba(30, 123, 156, 0.18);
}

.debug-log-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: baseline;
}

.debug-log-head strong,
.debug-log-head span,
.debug-log-entry p,
.debug-log-stack summary,
.debug-log-stack pre {
  overflow-wrap: anywhere;
}

.debug-log-head strong {
  color: var(--ink);
}

.debug-log-head span,
.debug-log-source {
  color: var(--muted);
  font-size: 0.82rem;
}

.debug-log-entry p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.debug-log-detail {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.85rem;
}

.debug-log-stack {
  margin-top: 10px;
}

.debug-log-stack summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 700;
}

.debug-log-stack pre {
  margin: 10px 0 0;
  padding: 12px;
  border-radius: 8px;
  background: rgba(24, 32, 41, 0.06);
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.8rem;
  line-height: 1.45;
  white-space: pre-wrap;
}

code {
  padding: 0.15em 0.38em;
  border-radius: 6px;
  background: rgba(24, 32, 41, 0.08);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.92em;
}

@media (max-width: 1120px) {
  .workspace,
  .hero {
    grid-template-columns: 1fr;
  }

  .year-overview,
  .summary-grid,
  .timetable-summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .page-shell {
    width: min(100vw - 20px, 1920px);
    padding-top: 18px;
  }

  .toolbar,
  .panel-header {
    flex-direction: column;
    align-items: stretch;
  }

  .timetable-fallback-link {
    width: 100%;
  }

  .timetable-header-actions {
    width: 100%;
  }

  .timetable-year-picker {
    width: 100%;
  }

  .timetable-year-select {
    width: 100%;
  }

  .timetable-week-actions {
    width: 100%;
  }

  .timetable-week-button {
    flex: 1 1 180px;
  }

  .group-header {
    flex-direction: column;
    align-items: stretch;
  }

  .group-stack-preview {
    grid-template-columns: 1fr;
  }

  .choice-set-cards {
    grid-template-columns: 1fr;
  }

  .legend {
    justify-content: flex-start;
  }

  .year-columns {
    grid-template-columns: 1fr;
    justify-content: stretch;
    gap: 18px;
    min-height: auto;
  }

  .year-overview,
  .summary-grid,
  .timetable-summary-grid {
    grid-template-columns: 1fr;
  }

  .detail-panel-modal {
    top: 10px;
    right: 10px;
    bottom: 10px;
    left: 10px;
    width: auto;
  }

  .debug-drawer {
    right: 12px;
    bottom: 12px;
    width: calc(100vw - 24px);
    max-height: 58vh;
  }

  .debug-drawer-header {
    flex-direction: column;
  }

  .debug-drawer-actions {
    width: 100%;
    justify-content: flex-start;
  }
}