:root {
  --bg: #0e0e10;
  --fg: #f5f3ee;
  --muted: #8a8780;
  --accent: #d9b48f;
  --error-bg: #3a1f20;
  --error-fg: #f5b6b6;
  --serif: ui-serif, "Iowan Old Style", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro", Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body {
  display: grid;
  place-items: center;
  padding: 2rem;
}

main {
  width: 100%;
  display: grid;
  place-items: center;
}

.hero {
  text-align: center;
  max-width: 32rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.hero.hidden { display: none; }

h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(3rem, 12vw, 6rem);
  letter-spacing: -0.04em;
  line-height: 1;
}

h1.small-title {
  font-size: clamp(1.5rem, 5vw, 2rem);
  color: var(--fg);
}

.tag {
  font-size: 1.125rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.muted {
  font-size: 0.875rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.muted.small {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  margin-top: 0.5rem;
}

.btn-primary {
  font-family: var(--sans);
  font-size: 1rem;
  background: var(--fg);
  color: var(--bg);
  border: none;
  padding: 0.9rem 2rem;
  border-radius: 999px;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: transform 80ms ease, opacity 200ms ease;
}

.btn-primary:hover { transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); opacity: 0.9; }

.btn-link {
  background: transparent;
  border: none;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.875rem;
  cursor: pointer;
  letter-spacing: 0.04em;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 4px;
  transition: text-decoration-color 200ms ease;
}

.btn-link:hover { text-decoration-color: var(--muted); }

.actions {
  display: flex;
  gap: 1.5rem;
  margin-top: 1rem;
}

.library-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 0;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: progress;
}

.error {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--error-bg);
  color: var(--error-fg);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-size: 0.875rem;
  max-width: min(90vw, 28rem);
}

.error.hidden { display: none; }

.hidden { display: none !important; }