:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4d;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --warning-bg: #3d2e0a;
  --warning-border: #b45309;
  --radius: 8px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.header {
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
}

.header h1 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 700;
}

.tagline {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.disclaimer {
  margin: 1.5rem 0;
  padding: 0.75rem 1rem;
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
}

.search-section {
  margin-bottom: 1.5rem;
}

.search-form {
  display: flex;
  gap: 0.5rem;
}

.search-form input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
}

.search-form input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.search-form button {
  padding: 0.75rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.search-form button:hover {
  background: var(--accent-hover);
}

.search-form button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.status {
  padding: 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

#answer-text {
  margin: 0;
}

.mock-badge {
  margin: 0.75rem 0 0;
  font-size: 0.8rem;
  color: var(--warning-border);
}

.citations ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.citations li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.citations a {
  color: var(--accent);
  font-weight: 600;
}

.citations .snippet {
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.footer {
  margin-top: 3rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}

.footer a {
  color: var(--accent);
}

.hidden {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 540px) {
  .search-form {
    flex-direction: column;
  }
}