/* BookStore V2 — dark theme, glass, motion */

[data-theme="dark"] {
  --primary: #a78bfa;
  --primary-hover: #8b5cf6;
  --primary-soft: rgba(139, 92, 246, 0.15);
  --primary-glow: rgba(167, 139, 250, 0.08);
  --bg: #0c0e14;
  --bg-mesh: radial-gradient(ellipse 100% 70% at 0% -10%, rgba(124, 58, 237, 0.22), transparent 55%),
    radial-gradient(ellipse 70% 50% at 100% 5%, rgba(91, 33, 182, 0.15), transparent 50%),
    var(--bg);
  --card: #161922;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #2a2f3d;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  --shadow-hover: 0 24px 48px rgba(124, 58, 237, 0.25);
  --glass: rgba(22, 25, 34, 0.82);
}

[data-theme="dark"] .bs-header {
  background: rgba(22, 25, 34, 0.88);
}

[data-theme="dark"] .bs-hero {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.12) 0%, rgba(22, 25, 34, 0.6) 50%, transparent 100%);
}

[data-theme="dark"] .bs-section-muted {
  background: rgba(22, 25, 34, 0.5);
}

[data-theme="dark"] .bs-book-cover {
  background: linear-gradient(145deg, rgba(124, 58, 237, 0.2), #1e2230);
}

.bs-glass {
  background: var(--glass, rgba(255, 255, 255, 0.72));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .bs-glass {
  border-color: rgba(255, 255, 255, 0.08);
}

.bs-glass-hero {
  background: linear-gradient(135deg, var(--primary-soft) 0%, transparent 60%);
  border-bottom: 1px solid var(--border);
}

.page-enter { animation: pageIn 0.45s ease; }
@keyframes pageIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

.bs-stagger .bs-book-card {
  animation: cardIn 0.5s ease backwards;
}
.bs-stagger .bs-book-card:nth-child(1) { animation-delay: 0.05s; }
.bs-stagger .bs-book-card:nth-child(2) { animation-delay: 0.1s; }
.bs-stagger .bs-book-card:nth-child(3) { animation-delay: 0.15s; }
.bs-stagger .bs-book-card:nth-child(4) { animation-delay: 0.2s; }

@keyframes cardIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to { opacity: 1; transform: none; }
}

.float-anim { animation: float 4s ease-in-out infinite; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.btn-primary, .btn-favorite {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(139, 92, 246, 0.35); }
.btn-favorite.pulse { animation: heartPulse 0.4s ease; }
@keyframes heartPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

.btn-theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}
.btn-theme-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: rotate(15deg);
}

.bs-toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}
.bs-toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.3s ease;
  pointer-events: auto;
  max-width: 320px;
}
.bs-toast.show { opacity: 1; transform: none; }
.bs-toast-success i { color: #22c55e; }
.bs-toast-error i { color: #ef4444; }
.bs-toast-info i { color: var(--primary); }

.bs-skeleton-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}
.bs-skeleton-card {
  height: 280px;
  border-radius: var(--radius-lg);
  background: linear-gradient(90deg, var(--border) 25%, var(--card) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.bs-empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
}
.bs-empty-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--primary);
}

.bs-stats-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.bs-stat-pill {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
}

.bs-analytics-card {
  padding: 1.25rem;
  border-radius: var(--radius-lg);
}
.bs-analytics-card .label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.bs-analytics-card strong { font-size: 1.35rem; }

.bs-achievement {
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  text-align: center;
  transition: transform 0.2s ease;
}
.bs-achievement.unlocked {
  border-color: var(--primary);
  background: var(--primary-soft);
}
.bs-achievement.locked { opacity: 0.45; filter: grayscale(0.8); }
.bs-achievement i { font-size: 1.75rem; display: block; margin-bottom: 0.5rem; color: var(--primary); }
.bs-achievement strong { display: block; }
.bs-achievement span { color: var(--text-muted); }

.bs-leader-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  border-radius: var(--radius-lg);
  animation: cardIn 0.4s ease backwards;
}
.bs-leader-rank {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}
.bs-leader-rank.top { background: var(--primary); color: #fff; }
.bs-leader-avatar { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; }
.bs-leader-score { font-weight: 800; color: var(--primary); }

.bs-reading-item { padding: 1rem; border-radius: var(--radius-lg); margin-bottom: 0.5rem; }
.bs-reading-thumb { width: 64px; height: 88px; object-fit: cover; border-radius: 8px; }

.bs-author-card { padding: 1.25rem; border-radius: var(--radius-lg); }
.bs-author-avatar { font-size: 2rem; margin-bottom: 0.5rem; }

[data-theme="dark"] .bs-header,
[data-theme="dark"] .bs-footer,
[data-theme="dark"] .bs-sidebar,
[data-theme="dark"] .bs-topbar {
  background: var(--card);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
  background: var(--bg);
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .navbar-toggler-icon {
  filter: invert(1);
}