/* ============================================
   Vintage Verdicts — Custom Styles
   Vintage library aesthetic
   ============================================ */

/* ---- Base & Typography ---- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --vintage-cream: #f9f5ec;
  --vintage-parchment: #f0e9d8;
  --vintage-brown: #5c4033;
  --vintage-dark: #2c1e14;
  --vintage-gold: #b8860b;
  --vintage-accent: #8b5a2b;
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem; /* offset for sticky header */
}

body {
  background-color: var(--vintage-cream);
  color: var(--vintage-dark);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 12px;
}
::-webkit-scrollbar-track {
  background: var(--vintage-parchment);
}
::-webkit-scrollbar-thumb {
  background: var(--vintage-accent);
  border-radius: 6px;
  border: 3px solid var(--vintage-parchment);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--vintage-brown);
}

/* ---- Focus styles (accessibility) ---- */
:focus-visible {
  outline: 2px solid var(--vintage-gold);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---- Navigation links ---- */
.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--vintage-parchment);
  letter-spacing: 0.015em;
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background-color: var(--vintage-gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

.nav-link:hover {
  color: var(--vintage-gold);
}

.nav-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.mobile-nav-link {
  font-weight: 500;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* ---- Hero ---- */
.hero-section {
  min-height: clamp(500px, 80vh, 800px);
  display: flex;
  align-items: center;
}

/* ---- Buttons ---- */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.01em;
  transition: background-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base), color var(--transition-base);
  cursor: pointer;
  text-decoration: none;
  line-height: 1.5;
}

.btn-primary {
  background-color: var(--vintage-gold);
  color: var(--vintage-dark);
  box-shadow: 0 4px 14px rgba(184, 134, 11, 0.35);
}

.btn-primary:hover {
  background-color: #d19f1a;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(184, 134, 11, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(184, 134, 11, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--vintage-parchment);
  border: 1.5px solid var(--vintage-gold);
}

.btn-secondary:hover {
  background-color: rgba(184, 134, 11, 0.15);
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: translateY(0);
}

/* ---- Filter buttons ---- */
.filter-btn {
  padding: 0.5rem 1.125rem;
  border-radius: 9999px;
  border: 1.5px solid rgba(92, 64, 51, 0.25);
  background-color: transparent;
  color: var(--vintage-brown);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.filter-btn:hover {
  background-color: rgba(184, 134, 11, 0.12);
  border-color: var(--vintage-gold);
  transform: translateY(-1px);
}

.filter-btn:active {
  transform: translateY(0);
}

.filter-btn.active {
  background-color: var(--vintage-brown);
  color: var(--vintage-parchment);
  border-color: var(--vintage-brown);
  box-shadow: 0 2px 8px rgba(92, 64, 51, 0.25);
}

.filter-btn.active:hover {
  background-color: #4a3328;
  border-color: #4a3328;
}

/* ---- Book cards ---- */
.book-card {
  background-color: #fffdf7;
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid rgba(92, 64, 51, 0.1);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  display: flex;
  flex-direction: column;
}

.book-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -12px rgba(44, 30, 20, 0.25);
  border-color: rgba(184, 134, 11, 0.4);
}

.book-card__cover {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background-color: var(--vintage-parchment);
}

.book-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

.book-card:hover .book-card__cover img {
  transform: scale(1.05);
}

.book-card__era-badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background-color: rgba(44, 30, 20, 0.85);
  color: var(--vintage-gold);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  backdrop-filter: blur(4px);
}

.book-card__body {
  padding: 1.25rem 1.25rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.book-card__title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--vintage-dark);
  line-height: 1.3;
  margin-bottom: 0.25rem;
}

.book-card__author {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--vintage-accent);
  margin-bottom: 0.75rem;
}

.book-card__blurb {
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(92, 64, 51, 0.85);
  margin-bottom: 1rem;
  flex: 1;
}

.book-card__subgenre {
  display: inline-block;
  align-self: flex-start;
  padding: 0.25rem 0.625rem;
  border-radius: 0.375rem;
  background-color: rgba(184, 134, 11, 0.12);
  color: var(--vintage-accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* ---- Footer links ---- */
.footer-link {
  color: rgba(240, 233, 216, 0.7);
  transition: color var(--transition-base), padding-left var(--transition-base);
}

.footer-link:hover {
  color: var(--vintage-gold);
  padding-left: 4px;
}

/* ---- Animations ---- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.book-card {
  animation: fadeInUp 400ms ease-out both;
}

/* Stagger animation for grid items */
.book-card:nth-child(1) { animation-delay: 0ms; }
.book-card:nth-child(2) { animation-delay: 50ms; }
.book-card:nth-child(3) { animation-delay: 100ms; }
.book-card:nth-child(4) { animation-delay: 150ms; }
.book-card:nth-child(5) { animation-delay: 200ms; }
.book-card:nth-child(6) { animation-delay: 250ms; }
.book-card:nth-child(7) { animation-delay: 300ms; }
.book-card:nth-child(8) { animation-delay: 350ms; }
.book-card:nth-child(9) { animation-delay: 400ms; }
.book-card:nth-child(10) { animation-delay: 450ms; }
.book-card:nth-child(11) { animation-delay: 500ms; }
.book-card:nth-child(12) { animation-delay: 550ms; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .book-card:hover {
    transform: none;
  }
  .book-card:hover .book-card__cover img {
    transform: none;
  }
}

/* ---- Responsive tweaks ---- */
@media (max-width: 639px) {
  .hero-section {
    min-height: 480px;
  }
  .filter-btn {
    font-size: 0.8125rem;
    padding: 0.4375rem 0.875rem;
  }
  .book-card__title {
    font-size: 1.125rem;
  }
}

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