:root {
  --bg: #0F1417;
  --bg-soft: #161D22;
  --surface: #FBF9F4;
  --ink: #1C2521;
  --muted: #8B96A1;
  --teal: #5CB3AD;
  --amber: #E7A94C;
  --rule: #2A3339;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
  margin: 0;
  background: var(--bg);
  background-image: radial-gradient(circle at 50% 0%, var(--bg-soft), var(--bg) 60%);
  color: var(--muted);
  font-family: var(--font-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--teal);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.75rem clamp(1.25rem, 5vw, 3rem);
}

.wordmark {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  border: 1px solid var(--rule);
  padding: 0.35rem 0.6rem;
  border-radius: 4px;
}

.header-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem clamp(1.25rem, 5vw, 3rem) 4rem;
}

.hero {
  width: 100%;
  max-width: 640px;
}

.query {
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 2vw, 1rem);
  margin: 0 0 1.5rem;
  color: var(--teal);
}

.query-label {
  color: var(--muted);
  margin-right: 0.6em;
}

.query-label::before { content: "› "; }

.cursor {
  display: inline-block;
  width: 0.55em;
  height: 1em;
  background: var(--teal);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.answer-card {
  background: var(--surface);
  color: var(--ink);
  border-radius: 14px;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.5);
}

.answer-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: #7A8A85;
  margin: 0 0 0.75rem;
}

.answer-body {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
  line-height: 1.55;
  margin: 0;
}

.answer-body sup {
  font-family: var(--font-mono);
  font-size: 0.6em;
  color: var(--amber);
  margin-left: 1px;
}

.citation {
  display: flex;
  gap: 1rem;
  margin-top: 2.25rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.citation.revealed {
  opacity: 1;
  transform: translateY(0);
}

.citation-mark {
  font-family: var(--font-mono);
  color: var(--amber);
  font-size: 0.85rem;
  padding-top: 0.35rem;
  flex-shrink: 0;
}

.name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.1rem, 6vw, 3rem);
  line-height: 1.05;
  color: var(--surface);
  margin: 0 0 0.35rem;
}

.title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--teal);
  margin: 0 0 1.25rem;
  letter-spacing: 0.02em;
}

.cta {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.site-footer {
  text-align: center;
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #4A555C;
}

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
  .citation { transition: none; }
}

@media (max-width: 420px) {
  .citation { flex-direction: column; gap: 0.5rem; }
}