:root {
  --bg: #faf8f3;
  --bg-alt: #f2ede1;
  --ink: #2b2620;
  --ink-muted: #6b6459;
  --primary: #1e3a5f;
  --primary-hover: #16304f;
  --on-primary: #faf8f3;
  --accent: #c62828;
  --font-serif: "Noto Serif TC", "Songti TC", "PMingLiU", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC",
    "Microsoft JhengHei", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121820;
    --bg-alt: #1b2431;
    --ink: #e8e3d8;
    --ink-muted: #9aa5b1;
    --primary: #7fa8d9;
    --primary-hover: #9dbde6;
    --on-primary: #121820;
    --accent: #ec6d5e;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.7;
}

.deck-hero {
  background: var(--primary);
  color: var(--on-primary);
  padding: 88px 24px 76px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.deck-hero-starmap {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--on-primary);
  opacity: 0.5;
  z-index: 0;
}

.deck-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
}

.deck-hero-kicker {
  font-size: 14px;
  letter-spacing: 0.08em;
  opacity: 0.72;
  margin: 0 0 14px;
}

.deck-hero-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.25rem, 1.5rem + 3vw, 3.25rem);
  line-height: 1.25;
  letter-spacing: 0.02em;
  margin: 0 0 20px;
}

.deck-hero-lead {
  font-size: 1.0625rem;
  line-height: 1.85;
  opacity: 0.85;
  margin: 0;
}

.deck-section {
  max-width: 640px;
  margin: 0 auto;
  padding: 64px 24px 24px;
}

.deck-list {
  display: flex;
  flex-direction: column;
}

.deck-item {
  display: block;
  padding: 28px 0;
  border-top: 1px solid color-mix(in srgb, var(--ink) 14%, transparent);
  text-decoration: none;
  color: inherit;
}

.deck-list .deck-item:last-child {
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 14%, transparent);
}

.deck-item-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.deck-item-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.375rem;
  margin: 0;
  color: var(--ink);
}

.deck-item:hover .deck-item-title {
  color: var(--primary);
}

.deck-item-lock {
  font-size: 0.8125rem;
  color: var(--ink-muted);
  white-space: nowrap;
}

.deck-item-desc {
  margin: 12px 0 0;
  color: var(--ink-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 58ch;
}

.deck-cta {
  background: var(--bg-alt);
  text-align: center;
  padding: 64px 24px;
}

.deck-cta-inner {
  max-width: 460px;
  margin: 0 auto;
}

.deck-cta-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.375rem;
  margin: 0 0 14px;
  color: var(--ink);
}

.deck-cta-lead {
  color: var(--ink-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  margin: 0 0 28px;
}

.deck-cta-link {
  display: inline-block;
  padding: 13px 32px;
  border-radius: 6px;
  background: var(--primary);
  color: var(--on-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
}

.deck-cta-link:hover,
.deck-cta-link:focus-visible {
  background: var(--accent);
}

.deck-footer {
  text-align: center;
  padding: 0 24px 56px;
  font-size: 0.8125rem;
  color: var(--ink-muted);
}

.deck-footer a {
  color: inherit;
}