:root {
  color-scheme: light;
}

i[data-lucide] {
  display: inline-grid;
  width: 1.25em;
  height: 1.25em;
  place-items: center;
  font-style: normal;
  line-height: 1;
}

i[data-lucide]::before {
  content: "◆";
  font-size: 0.58em;
}

#prevBtn i[data-lucide]::before {
  content: "‹";
  font-size: 1.7em;
}

#nextBtn i[data-lucide]::before {
  content: "›";
  font-size: 1.7em;
}

.public-back-link {
  position: fixed;
  z-index: 60;
  top: 18px;
  left: 18px;
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 15px;
  border: 1px solid rgba(23, 25, 30, 0.24);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.94);
  color: #17191e;
  font: 700 13px/1.2 ui-sans-serif, system-ui, sans-serif;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(23, 25, 30, 0.12);
}

.public-back-link:hover,
.public-back-link:focus-visible {
  border-color: #2563eb;
  outline: 3px solid rgba(37, 99, 235, 0.22);
  outline-offset: 2px;
}

.nav button:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.32);
  outline-offset: 3px;
}

.nav button:disabled {
  cursor: not-allowed;
  opacity: 0.35;
}

.public-index {
  min-height: 100vh;
  margin: 0;
  background: #f5f4ee;
  color: #17191e;
  font-family: ui-sans-serif, system-ui, sans-serif;
}

.public-index * {
  box-sizing: border-box;
}

.public-index-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 32px 0 72px;
}

.public-index-header {
  padding: 60px 0 42px;
  border-bottom: 1px solid #d8d5ca;
}

.public-index-logo {
  width: 160px;
  height: auto;
}

.public-index-kicker {
  margin: 44px 0 12px;
  color: #1e40af;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.public-index h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(2.5rem, 8vw, 6.5rem);
  line-height: 0.95;
  letter-spacing: -0.055em;
}

.public-index-lead {
  max-width: 42rem;
  margin: 24px 0 0;
  color: #56524a;
  font-size: 1.08rem;
  line-height: 1.8;
}

.public-deck-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.public-deck-list a {
  display: grid;
  min-height: 150px;
  padding: 24px;
  border: 1px solid #d8d5ca;
  border-radius: 18px;
  background: #fff;
  color: inherit;
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease;
}

.public-deck-list a:hover,
.public-deck-list a:focus-visible {
  border-color: #2563eb;
  outline: 3px solid rgba(37, 99, 235, 0.18);
  outline-offset: 2px;
  transform: translateY(-2px);
}

.public-deck-number {
  color: #2563eb;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.public-deck-title {
  align-self: end;
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 800;
  line-height: 1.35;
}

@media (max-width: 700px) {
  .public-index-shell {
    width: min(100% - 28px, 1120px);
  }

  .public-index-header {
    padding-top: 48px;
  }

  .public-deck-list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .public-deck-list a {
    transition: none;
  }
}

@media print {
  .public-back-link,
  .nav,
  .hint {
    display: none !important;
  }
}