:root {
  color-scheme: light;
  --bg: oklch(97.5% 0.012 252);
  --surface: oklch(99.1% 0.004 252);
  --surface-raised: oklch(99.7% 0.003 252);
  --surface-muted: oklch(95.2% 0.015 252);
  --text: oklch(24% 0.035 258);
  --muted: oklch(48% 0.028 256);
  --border: oklch(86.5% 0.019 252);
  --field-border: oklch(78.5% 0.026 252);
  --accent: oklch(43.5% 0.135 251);
  --accent-dark: oklch(34% 0.13 251);
  --accent-soft: oklch(94.8% 0.038 249);
  --accent-ring: oklch(74% 0.095 251);
  --info-bg: oklch(95.7% 0.032 252);
  --info-border: oklch(66% 0.08 251);
  --info-text: oklch(34% 0.075 252);
  --warning-bg: oklch(96.8% 0.064 91);
  --warning-border: oklch(68% 0.14 82);
  --warning-text: oklch(36% 0.075 82);
  --error-bg: oklch(96.6% 0.03 24);
  --error-border: oklch(55% 0.17 25);
  --error-text: oklch(38% 0.12 25);
  --success-bg: oklch(95.8% 0.042 148);
  --success-text: oklch(38% 0.09 148);
  --code-bg: oklch(22% 0.033 260);
  --code-text: oklch(95% 0.01 248);
  --shadow: 0 1px 2px oklch(28% 0.04 258 / 0.06), 0 10px 28px oklch(28% 0.04 258 / 0.07);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-block-size: 100dvh;
  background: var(--bg);
  color: var(--text);
}

body.has-preview-notice {
  padding-block-end: 3rem;
}

a {
  color: var(--accent);
  text-underline-offset: 0.16em;
}

a:hover {
  color: var(--accent-dark);
}

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

button:focus-visible,
textarea:focus-visible,
select:focus-visible,
input:focus-visible,
a:focus-visible,
summary:focus-visible,
pre:focus-visible {
  outline: 3px solid var(--accent-ring);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  z-index: 10;
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 0.55rem 0.75rem;
  background: var(--surface-raised);
  color: var(--accent-dark);
  font-weight: 750;
  text-decoration: none;
  transform: translateY(calc(-100% - 1rem));
  transition: transform 180ms var(--ease-out);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.app-header {
  border-block-end: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, var(--bg));
}

.app-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  inline-size: min(100%, 1080px);
  margin-inline: auto;
  padding: 1rem clamp(1rem, 3vw, 1.5rem);
}

.app-header h1 {
  margin: 0;
  font-size: 1.42rem;
  line-height: 1.15;
  letter-spacing: 0;
}

.status-line {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.project-notice {
  inline-size: min(calc(100% - 2rem), 860px);
  margin: 0 auto 1rem;
  border: 1px solid var(--warning-border);
  border-radius: 6px;
  padding: 0.72rem 0.9rem;
  background: var(--warning-bg);
  color: var(--warning-text);
  font-size: 0.94rem;
  font-weight: 560;
  line-height: 1.45;
}

.project-notice strong {
  font-weight: 800;
}

.preview-notice {
  position: fixed;
  inset-block-end: 0;
  inset-inline: 0;
  z-index: 8;
  border-block-start: 1px solid var(--warning-border);
  padding: 0.72rem clamp(1rem, 3vw, 1.5rem);
  background: var(--warning-bg);
  color: var(--warning-text);
  font-size: 0.94rem;
  font-weight: 750;
  line-height: 1.35;
  text-align: center;
  box-shadow: 0 -8px 22px oklch(28% 0.04 258 / 0.08);
}

.header-link {
  flex: 0 0 auto;
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
}

.app-shell {
  inline-size: min(100%, 1080px);
  margin-inline: auto;
  padding: 1rem clamp(0.75rem, 2vw, 1.5rem) 1.5rem;
}

.workspace {
  display: grid;
  gap: 0.9rem;
  align-content: start;
  min-inline-size: 0;
}

.query-panel,
.answer-panel {
  min-inline-size: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.query-panel {
  padding: clamp(0.9rem, 2vw, 1.15rem);
}

.field {
  display: grid;
  gap: 0.35rem;
}

label,
legend {
  font-weight: 700;
  font-size: 0.9rem;
}

textarea,
select {
  inline-size: 100%;
  min-inline-size: 0;
  min-block-size: 48px;
  border: 1px solid var(--field-border);
  border-radius: 6px;
  padding: 0.75rem;
  background: var(--surface-raised);
  color: var(--text);
  transition: border-color 160ms var(--ease-out), background-color 160ms var(--ease-out);
}

textarea:hover,
select:hover {
  border-color: color-mix(in oklab, var(--field-border) 65%, var(--accent));
}

textarea {
  resize: vertical;
  line-height: 1.5;
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.control-grid {
  display: grid;
  grid-template-columns: minmax(12rem, 0.9fr) minmax(18rem, 1.25fr) minmax(15rem, 1fr);
  gap: 0.85rem;
  margin-block-start: 1rem;
}

fieldset {
  min-inline-size: 0;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.72rem;
  background: color-mix(in oklab, var(--surface-raised) 72%, var(--surface-muted));
}

.choice-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-block-start: 0.45rem;
}

.choice-group label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-block-size: 36px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.55rem;
  background: var(--surface);
  font-weight: 600;
  color: var(--text);
  transition: border-color 160ms var(--ease-out), background-color 160ms var(--ease-out);
}

.choice-group label:hover {
  border-color: color-mix(in oklab, var(--field-border) 55%, var(--accent));
}

.choice-group label:has(input:checked) {
  border-color: color-mix(in oklab, var(--accent) 38%, var(--border));
  background: var(--accent-soft);
}

input[type="checkbox"] {
  accent-color: var(--accent);
  inline-size: 1rem;
  block-size: 1rem;
}

.obsolete-filter {
  background: var(--surface-muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-block-start: 1rem;
}

button {
  min-block-size: 44px;
  min-inline-size: 0;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 0.7rem 1rem;
  font-weight: 750;
  cursor: pointer;
  transition: background-color 170ms var(--ease-out), border-color 170ms var(--ease-out), color 170ms var(--ease-out), transform 170ms var(--ease-out);
}

button[type="submit"] {
  background: var(--accent);
  color: oklch(98% 0.006 252);
}

button[type="submit"]:hover {
  background: var(--accent-dark);
}

button[type="submit"]:active {
  transform: translateY(1px);
}

button[type="button"] {
  background: var(--surface-raised);
  border-color: var(--border);
  color: var(--accent);
}

button:disabled {
  cursor: wait;
  opacity: 0.65;
  transform: none;
}

.message-area {
  display: grid;
  gap: 0.35rem;
  border: 1px solid var(--info-border);
  border-radius: 6px;
  padding: 0.8rem 0.95rem;
  background: var(--info-bg);
  color: var(--info-text);
  font-weight: 650;
}

.message-area:empty {
  display: none;
}

.message-area.error {
  border-color: var(--error-border);
  background: var(--error-bg);
  color: var(--error-text);
}

.message-area.loading {
  border-color: var(--info-border);
  background: var(--info-bg);
  color: var(--info-text);
}

.answer-panel {
  padding: clamp(1rem, 2vw, 1.3rem);
}

.answer-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border-block-end: 1px solid var(--border);
  padding-block-end: 0.75rem;
}

.answer-panel h2 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.2;
  text-wrap: balance;
}

.answer-contract {
  display: inline-flex;
  align-items: center;
  min-block-size: 1.55rem;
  border: 1px solid color-mix(in oklab, var(--accent) 28%, var(--border));
  border-radius: 999px;
  padding-inline: 0.6rem;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.76rem;
  font-weight: 780;
  white-space: nowrap;
}

.warnings {
  display: grid;
  gap: 0.5rem;
  margin-block: 0.75rem;
}

.warnings:empty {
  display: none;
}

.warning {
  display: grid;
  gap: 0.25rem;
  border: 1px solid var(--warning-border);
  border-radius: 6px;
  padding: 0.75rem;
  background: var(--warning-bg);
  color: var(--warning-text);
}

.warning strong {
  font-weight: 650;
}

.answer-text {
  max-inline-size: 76ch;
  margin-block-start: 0.9rem;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.68;
  overflow-wrap: break-word;
}

.answer-placeholder {
  max-inline-size: 60ch;
  margin: 0;
  color: var(--muted);
}

.answer-text > * {
  margin: 0;
}

.answer-text > * + * {
  margin-block-start: 0.85rem;
}

.answer-text :where(h1, h2, h3, h4, h5, h6) {
  color: oklch(20% 0.04 258);
  font-weight: 780;
  line-height: 1.25;
  text-wrap: balance;
}

.answer-text h1 {
  font-size: 1.45rem;
}

.answer-text h2 {
  font-size: 1.25rem;
}

.answer-text h3 {
  font-size: 1.08rem;
}

.answer-text :where(p, li, blockquote) {
  text-wrap: pretty;
}

.answer-text :where(ul, ol) {
  padding-inline-start: 1.35rem;
}

.answer-text li + li {
  margin-block-start: 0.35rem;
}

.answer-text a {
  color: var(--accent);
  font-weight: 680;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.answer-text blockquote {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.8rem 0.95rem;
  background: var(--surface-muted);
  color: oklch(34% 0.03 258);
}

.answer-text :not(pre) > code {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.08rem 0.28rem;
  background: var(--surface-muted);
  font-size: 0.92em;
}

.answer-text pre {
  overflow: auto;
  border: 1px solid oklch(31% 0.04 260);
  border-radius: 6px;
  padding: 0.95rem;
  background: var(--code-bg);
  color: var(--code-text);
  font-size: 0.88rem;
  line-height: 1.55;
}

.answer-text pre code {
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  font: inherit;
}

.answer-text .citation-ref {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-inline-size: 1.45rem;
  min-block-size: 1.45rem;
  border: 1px solid color-mix(in oklab, var(--accent) 25%, var(--border));
  border-radius: 999px;
  padding-inline: 0.38rem;
  background: var(--accent-soft);
  font-size: 0.78em;
  font-weight: 620;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  line-height: 1;
  text-box: trim-both cap alphabetic;
  text-decoration: none;
  vertical-align: 0.08em;
}

.answer-text .citation-ref:hover {
  border-color: var(--accent);
}

.citation-list {
  display: grid;
  gap: 0.75rem;
  margin-block-start: 1rem;
  padding: 0;
  list-style: none;
}

.citation-list:empty {
  display: none;
}

.citation {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.875rem;
  background: var(--surface-raised);
  scroll-margin-block-start: 1rem;
  transition: border-color 170ms var(--ease-out), background-color 170ms var(--ease-out), box-shadow 170ms var(--ease-out);
}

.citation a {
  overflow-wrap: anywhere;
  font-weight: 650;
}

.citation:target {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.citation h3 {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.3;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-block: 0.45rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.source-language {
  font-weight: 650;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-block-size: 1.45rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding-inline: 0.5rem;
  background: var(--surface-muted);
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 760;
}

.badge.review,
.badge.draft,
.badge.out_of_date,
.badge.updated,
.badge.unlinked {
  border-color: var(--warning-border);
  background: var(--warning-bg);
}

.badge.published,
.badge.current {
  background: var(--success-bg);
}

@media (max-width: 980px) {
  .control-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .app-header__inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .app-header h1 {
    font-size: 1.28rem;
  }

  .app-shell {
    padding: 0.75rem;
  }

  .actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

  .actions button {
    inline-size: 100%;
  }

  .answer-panel__header {
    align-items: flex-start;
    flex-direction: column;
  }

  .choice-group {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

  .choice-group label {
    display: flex;
    min-block-size: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .skip-link,
  button,
  textarea,
  select,
  .choice-group label,
  .citation {
    transition: none;
  }
}