:root {
  --bg: #f4efe6;
  --bg-deep: #ebe3d4;
  --ink: #1c1712;
  --ink-soft: #5c5348;
  --accent: #8b3a2a;
  --accent-hover: #6f2d21;
  --card: #fffdf9;
  --line: rgba(28, 23, 18, 0.12);
  --shadow: 0 24px 60px rgba(28, 23, 18, 0.08);
  --radius: 18px;
  --serif: "Cormorant Garamond", Georgia, serif;
  --sans: "DM Sans", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(139, 58, 42, 0.08), transparent 28%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

.page {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
}

.hero {
  text-align: center;
  margin-bottom: 2rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.8rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 0.95;
}

.subtitle {
  max-width: 38rem;
  margin: 1rem auto 1.25rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

.source-toggle {
  display: inline-flex;
  gap: 0.35rem;
  padding: 0.35rem;
  margin-bottom: 1.25rem;
  border-radius: 999px;
  background: rgba(255, 253, 249, 0.85);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.source-option {
  border: 0;
  border-radius: 999px;
  padding: 0.65rem 1.1rem;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.source-option.is-active {
  background: var(--accent);
  color: #fff;
}

.source-option:hover:not(.is-active) {
  color: var(--ink);
}

.source-badge {
  display: inline-block;
  margin: 0 0 0.75rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(139, 58, 42, 0.1);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.search-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  max-width: 42rem;
  margin: 0 auto;
  padding: 0.5rem;
  background: rgba(255, 253, 249, 0.85);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.search-bar input {
  width: 100%;
  border: 0;
  background: transparent;
  padding: 0.95rem 1.1rem;
  font: inherit;
  font-size: 1rem;
  color: var(--ink);
}

.search-bar input:focus {
  outline: none;
}

.search-bar button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-width: 7.5rem;
  border: 0;
  border-radius: 999px;
  padding: 0.95rem 1.35rem;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.search-bar button:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.search-bar button:disabled {
  opacity: 0.75;
  cursor: wait;
}

.spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.results {
  animation: fadeUp 0.45s ease;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.book-card {
  display: grid;
  grid-template-columns: minmax(220px, 320px) 1fr;
  gap: 2rem;
  padding: 1.75rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
}

.covers {
  display: grid;
  gap: 1rem;
}

.cover-block {
  margin: 0;
}

.cover-block figcaption {
  margin-bottom: 0.55rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.cover-frame {
  position: relative;
  aspect-ratio: 2 / 3;
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(145deg, #ece5da, #ddd4c7);
  border: 1px solid var(--line);
}

.cover-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
}

.cover-frame img.loaded {
  display: block;
}

.cover-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.cover-frame img.loaded + .cover-placeholder {
  display: none;
}

.book-meta h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.05;
}

.author-line {
  margin: 0.65rem 0 1.4rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem 1.25rem;
  margin: 0 0 1.5rem;
}

.facts div {
  padding: 0.85rem 1rem;
  border-radius: 12px;
  background: rgba(235, 227, 212, 0.55);
}

.facts dt {
  margin-bottom: 0.25rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.facts dd {
  margin: 0;
  font-weight: 600;
}

.facts dd.missing-value {
  color: var(--ink-soft);
  font-weight: 500;
  font-style: italic;
}

.summary-block,
.prices-block,
.links-block,
.alternatives {
  margin-top: 1.5rem;
}

.summary-block h3,
.prices-block h3,
.links-block h3,
.alternatives h3 {
  margin: 0 0 0.65rem;
  font-family: var(--serif);
  font-size: 1.45rem;
}

#book-summary {
  margin: 0;
  line-height: 1.7;
  color: var(--ink-soft);
}

.price-list,
.purchase-links,
#alternatives-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.price-list li,
.purchase-links li,
#alternatives-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.price-list li:last-child,
.purchase-links li:last-child,
#alternatives-list li:last-child {
  border-bottom: 0;
}

.price-amount {
  font-weight: 700;
  color: var(--accent);
}

.price-note {
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.purchase-links a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.purchase-links a:hover {
  text-decoration: underline;
}

.alt-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.alt-item img {
  width: 42px;
  height: 62px;
  object-fit: cover;
  border-radius: 6px;
  background: #ddd4c7;
}

.alt-item button {
  border: 0;
  background: none;
  padding: 0;
  font: inherit;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}

.empty-state,
.error-state {
  margin-top: 2rem;
  text-align: center;
  color: var(--ink-soft);
}

.error-state {
  padding: 1rem 1.25rem;
  border-radius: 12px;
  background: rgba(139, 58, 42, 0.08);
  color: var(--accent);
}

.footer {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto 2rem;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.footer a {
  color: var(--accent);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 820px) {
  .book-card {
    grid-template-columns: 1fr;
  }

  .covers {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 540px) {
  .search-bar {
    grid-template-columns: 1fr;
    border-radius: var(--radius);
  }

  .search-bar button {
    width: 100%;
  }

  .facts {
    grid-template-columns: 1fr;
  }

  .covers {
    grid-template-columns: 1fr;
  }
}