:root {
  --color-bg: #f6f1e7;
  --color-bg-raised: #efe8d9;
  --color-fg: #1c1917;
  --color-fg-muted: #5c564c;
  --color-border: #ddd3bf;
  --color-accent: #b8451f;
  --color-accent-fg: #f6f1e7;
  --color-accent-ink: #8a3216;

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Public Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-fg);
  font-family: var(--font-body);
  line-height: 1.5;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

header h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 2.1rem;
  margin: 0 0 0.5rem;
  color: var(--color-fg);
}

.subtitle {
  margin: 0 0 2rem;
  color: var(--color-fg-muted);
  font-size: 0.95rem;
  max-width: 42rem;
}

.panel {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
}

#query-form {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

textarea {
  flex: 1;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-bg);
  color: var(--color-fg);
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea::placeholder {
  color: var(--color-fg-muted);
}

textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(184, 69, 31, 0.15);
}

button#ask-btn {
  padding: 0.75rem 1.35rem;
  border: 1px solid var(--color-accent);
  border-radius: 10px;
  background: var(--color-accent);
  color: var(--color-accent-fg);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

button#ask-btn:hover:not(:disabled) {
  background: var(--color-accent-ink);
  border-color: var(--color-accent-ink);
}

button:disabled {
  opacity: 0.55;
  cursor: default;
}

.status {
  margin: 1rem 0 0;
  color: var(--color-fg-muted);
  font-size: 0.9rem;
}

.example-questions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.1rem;
}

.example-group {
  flex: 1 1 260px;
  min-width: 0;
}

.example-group h3 {
  margin: 0 0 0.15rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-fg-muted);
}

.example-note {
  margin: 0 0 0.5rem;
  color: var(--color-fg-muted);
  font-size: 0.8rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.example-chip {
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-fg);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.example-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}

section {
  margin-top: 1.75rem;
}

section h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-fg-muted);
  margin: 0 0 0.75rem;
  font-weight: 600;
}

.answer {
  white-space: pre-wrap;
  font-size: 1.05rem;
}

.citation {
  color: var(--color-accent-ink);
  text-decoration: none;
  font-weight: 600;
}

.citation:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

#sources {
  padding-left: 1.25rem;
  margin: 0;
}

#sources li {
  margin-bottom: 0.9rem;
}

#sources li:last-child {
  margin-bottom: 0;
}

.source-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-accent-ink);
}

.source-text {
  color: var(--color-fg-muted);
  font-size: 0.88rem;
}

#latency-section summary {
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-fg-muted);
}

#latency-section summary:hover {
  color: var(--color-fg);
}

#latency-section[open] {
  padding-bottom: 1.25rem;
}

.latency {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.2rem 0.9rem;
  font-size: 0.85rem;
  color: var(--color-fg-muted);
  margin: 0.9rem 0 0;
}

.latency dt {
  font-weight: 600;
  font-family: var(--font-mono);
}

.latency dd {
  margin: 0;
  font-family: var(--font-mono);
}

#corpus-section {
  margin-top: 0;
}

.corpus-note {
  margin: 0;
  color: var(--color-fg-muted);
  font-size: 0.9rem;
}

#corpus-groups {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.corpus-group {
  flex: 1 1 220px;
  min-width: 0;
}

.corpus-group h3 {
  margin: 0 0 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-fg);
}

.corpus-group ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.85rem;
  color: var(--color-fg-muted);
}

.corpus-group li {
  margin-bottom: 0.25rem;
}

.corpus-group a {
  color: var(--color-accent-ink);
  text-decoration: none;
}

.corpus-group a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}