/* bookworm landing — dark by default, JetBrains Mono / system serif mix.
   Colors echo the underlying app palettes:
     DCC = warm crimson + tier-gold accents
     Empyrean = lightning indigo
*/

:root {
  --bg: oklch(0.13 0.018 250);
  --fg: oklch(0.95 0.012 90);
  --muted: oklch(0.65 0.018 95);
  --border: oklch(0.28 0.018 250);
  --card-bg: oklch(0.17 0.022 250);
  --card-bg-hover: oklch(0.21 0.024 250);
  --dcc-color: oklch(0.62 0.28 335);
  --empyrean-color: oklch(0.78 0.11 230);
  --gold: oklch(0.72 0.16 80);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family:
    "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1.25rem, 4vw, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 5vw, 3rem);
}

header h1 {
  font-family:
    "Playfair Display", Georgia, "Times New Roman", serif;
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--gold);
}

header .sub {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 0.5rem 0 0;
}

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .cards {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: clamp(1.5rem, 3vw, 2rem);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: background-color 150ms ease, border-color 150ms ease, transform 150ms ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: currentColor;
  opacity: 0.85;
}

.card.dcc {
  color: var(--dcc-color);
}

.card.empyrean {
  color: var(--empyrean-color);
}

.card:hover,
.card:focus-visible {
  background: var(--card-bg-hover);
  border-color: currentColor;
  outline: none;
  transform: translateY(-2px);
}

.card-eyebrow {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.card-title {
  font-family:
    "Playfair Display", Georgia, "Times New Roman", serif;
  font-size: clamp(1.6rem, 3.5vw, 2rem);
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.card-meta {
  font-size: 0.78rem;
  color: var(--muted);
}

.card-desc {
  font-size: 0.92rem;
  color: var(--fg);
  margin-top: 0.5rem;
  line-height: 1.6;
}

.card-cta {
  margin-top: 1rem;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: currentColor;
  font-weight: 600;
}

footer {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  font-size: 0.78rem;
  color: var(--muted);
}

footer a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 150ms ease, color 150ms ease;
}

footer a:hover,
footer a:focus-visible {
  color: var(--fg);
  border-bottom-color: var(--gold);
  outline: none;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: oklch(0.99 0.003 95);
    --fg: oklch(0.18 0.012 240);
    --muted: oklch(0.45 0.012 240);
    --border: oklch(0.88 0.012 95);
    --card-bg: oklch(1 0 0);
    --card-bg-hover: oklch(0.94 0.008 95);
  }
}