:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #17202a;
  --muted: #667085;
  --border: #d7dce3;
  --accent: #0057b8;
  --accent-dark: #003f88;
  --ok: #166534;
  --warn: #9a3412;
  --draft: #475569;
  --cue-aim: #dbeafe;
  --cue-aia: #dcfce7;
  --cue-aih: #fef3c7;
  --cue-ais: #ede9fe;
  --cue-aim-border: #93c5fd;
  --cue-aia-border: #86efac;
  --cue-aih-border: #fcd34d;
  --cue-ais-border: #c4b5fd;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  color: var(--text);
  font-weight: 700;
}

.topbar nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.container {
  width: min(1380px, calc(100% - 2rem));
  margin: 1.25rem auto 3rem;
}

.page-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

h1, h2, h3 {
  line-height: 1.2;
  margin: 0 0 0.6rem;
}

h1 {
  font-size: 1.65rem;
}

h2 {
  font-size: 1.2rem;
}

h3 {
  font-size: 1rem;
}

.muted, .class-description {
  color: var(--muted);
}

.panel, .card, .comparison-block, fieldset {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.panel {
  padding: 1.25rem;
}

.narrow {
  max-width: 440px;
  margin: 3rem auto;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.card {
  padding: 1rem;
}

.meta-grid {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.35rem 1rem;
}

.meta-grid dt {
  color: var(--muted);
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.stats > div {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem;
}

.stats strong {
  display: block;
  font-size: 1.4rem;
}

.stats span {
  color: var(--muted);
}

.button, button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.2rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.button.primary, button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.button.primary:hover, button.primary:hover {
  background: var(--accent-dark);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.inline-form {
  display: inline;
}

.link-button {
  min-height: auto;
  padding: 0;
  border: 0;
  color: var(--accent);
  background: transparent;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.data-table th, .data-table td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: #eef2f6;
}

.status {
  display: inline-flex;
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
  font-size: 0.85rem;
  background: #eef2f6;
  color: var(--draft);
}

.status.done {
  background: #dcfce7;
  color: var(--ok);
}

.status.warning {
  background: #ffedd5;
  color: var(--warn);
}

.annotation-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(420px, 1.05fr);
  gap: 1rem;
  align-items: start;
}

.abstract-pane, .form-pane {
  min-width: 0;
}

.abstract-pane {
  position: sticky;
  top: 4.8rem;
}

.abstract-text {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  font-size: 1.02rem;
}

.abstract-text > :first-child {
  margin-top: 0;
}

.abstract-text > :last-child {
  margin-bottom: 0;
}

.abstract-text p {
  margin: 0 0 0.85rem;
}

.abstract-text ul,
.abstract-text ol {
  margin: 0 0 0.85rem 1.25rem;
  padding: 0;
}

.hidden {
  display: none;
}

.metadata, .cue-panel {
  margin-top: 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem;
}

.metadata dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.4rem 0.8rem;
}

fieldset {
  margin: 0 0 1rem;
  padding: 1rem;
}

legend {
  font-weight: 700;
  padding: 0 0.3rem;
}

label {
  display: block;
  margin: 0.3rem 0;
}

input[type="text"], input[type="number"], input[type="password"], input[type="file"], textarea, select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem;
  font: inherit;
}

textarea {
  resize: vertical;
}

.check-row {
  display: flex;
  gap: 0.45rem;
  align-items: baseline;
}

.check-row input {
  flex: 0 0 auto;
}

.major-class-option {
  border: 1px solid var(--border);
  border-left-width: 8px;
  border-radius: 8px;
  margin: 0.6rem 0;
  padding: 0.65rem 0.75rem;
}

.major-class-option .class-description {
  margin: 0.3rem 0 0 1.45rem;
}

.major-code-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3rem;
  margin-right: 0.35rem;
  border-radius: 999px;
  padding: 0.08rem 0.45rem;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid currentColor;
}

.major-AIM {
  background: var(--cue-aim);
  border-color: var(--cue-aim-border);
}

.major-AIA {
  background: var(--cue-aia);
  border-color: var(--cue-aia-border);
}

.major-AIH {
  background: var(--cue-aih);
  border-color: var(--cue-aih-border);
}

.major-AIS {
  background: var(--cue-ais);
  border-color: var(--cue-ais-border);
}

.subclass-group {
  border: 1px solid var(--border);
  border-left-width: 5px;
  border-radius: 8px;
  margin: 0.8rem 0;
  padding: 0.8rem;
}

.subclass-group h3 {
  margin-bottom: 0.2rem;
}

.subclass-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  padding: 0.8rem 0;
  border-top: 1px solid var(--border);
}

.score-options {
  display: flex;
  gap: 0.4rem;
  align-items: start;
}

.score-options label {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.field-label {
  margin: 0 0 0.35rem;
  font-weight: 700;
}

.confidence-options {
  margin-bottom: 1rem;
}

.confidence-options > div {
  display: grid;
  gap: 0.45rem;
}

.confidence-options label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #f8fafc;
  padding: 0.6rem 0.75rem;
  cursor: pointer;
}

.confidence-options label:has(input:checked) {
  border-color: var(--accent);
  background: #e0f2fe;
}

.uka-tree {
  display: grid;
  gap: 0.45rem;
  margin: 0.6rem 0 0.8rem;
  max-height: 28rem;
  overflow: auto;
  padding-right: 0.25rem;
}

.uka-node {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
}

.uka-node summary {
  cursor: pointer;
  padding: 0.55rem 0.7rem;
  font-weight: 700;
}

.uka-node[open] > summary {
  border-bottom: 1px solid var(--border);
}

.uka-group {
  margin: 0.45rem 0.6rem 0.6rem;
}

.uka-choice {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  margin: 0;
  padding: 0.5rem 0.7rem;
  border-top: 1px solid rgba(215, 220, 227, 0.65);
  cursor: pointer;
}

.uka-choice:hover {
  background: rgba(255, 255, 255, 0.65);
}

.uka-choice:has(input:checked) {
  background: #e0f2fe;
  color: #0f3f66;
  font-weight: 700;
}

.uka-subject-list {
  display: grid;
}

.uka-subject {
  padding-left: 1rem;
}

.uka-code {
  display: inline-flex;
  min-width: 3.2rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.sticky-actions {
  position: sticky;
  bottom: 0;
  background: var(--bg);
  padding: 0.7rem 0;
}

.highlight {
  border-radius: 4px;
  padding: 0 0.12rem;
}

.cue-AIM {
  background: var(--cue-aim);
}

.cue-AIA {
  background: var(--cue-aia);
}

.cue-AIH {
  background: var(--cue-aih);
}

.cue-AIS {
  background: var(--cue-ais);
}

.cue-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.cue-chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.45rem;
  color: var(--text);
}

.comparison-block {
  padding: 1rem;
  margin-bottom: 1rem;
}

.comparison-block.has-disagreement {
  border-color: #fdba74;
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.8rem;
}

.annotation-card {
  border-left: 4px solid var(--accent);
  background: #f8fafc;
  padding: 0.8rem;
  border-radius: 6px;
}

.help-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.help-toc {
  position: sticky;
  top: 4.8rem;
  display: grid;
  gap: 0.35rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.help-toc h2 {
  margin-bottom: 0.25rem;
}

.help-toc a {
  padding: 0.25rem 0;
}

.help-content {
  display: grid;
  gap: 1rem;
}

.help-section, .scheme-major {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.help-section > :last-child,
.scheme-major > :last-child,
.scheme-subclass > :last-child {
  margin-bottom: 0;
}

.rule-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.75rem;
  margin: 0.8rem 0;
}

.rule-card {
  border: 1px solid var(--border);
  border-left-width: 6px;
  border-radius: 8px;
  padding: 0.85rem;
}

.score-guide {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.45rem 0.8rem;
  margin: 0.8rem 0;
}

.score-guide dt {
  font-weight: 700;
}

.scheme-major {
  border-left-width: 8px;
  margin-bottom: 1rem;
}

.scheme-subclass {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-top: 0.7rem;
  padding: 0.8rem;
}

.keyword-text {
  color: #334155;
  font-size: 0.95rem;
}

.messages {
  margin-bottom: 1rem;
}

.message {
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
  background: #eef2f6;
}

.message.success {
  background: #dcfce7;
}

.message.error {
  background: #fee2e2;
}

.back-link {
  display: inline-block;
  margin-bottom: 0.4rem;
}

@media (max-width: 920px) {
  .annotation-layout {
    grid-template-columns: 1fr;
  }

  .abstract-pane {
    position: static;
  }

  .page-heading {
    flex-direction: column;
  }

  .help-layout {
    grid-template-columns: 1fr;
  }

  .help-toc {
    position: static;
  }
}