@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-glass: rgba(255,255,255,0.04);
  --border-glass: rgba(255,255,255,0.08);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #8b5cf6;
  --accent-light: #a78bfa;
  --accent-glow: rgba(139,92,246,0.3);
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;
  --radius: 16px;
  --radius-sm: 10px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  margin: 0;
}

/* ─── Animated Background ─── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 20% 20%, rgba(139,92,246,0.12), transparent),
    radial-gradient(ellipse 500px 350px at 80% 80%, rgba(59,130,246,0.08), transparent),
    radial-gradient(ellipse 400px 300px at 50% 50%, rgba(16,185,129,0.05), transparent);
  z-index: 0;
  pointer-events: none;
  animation: bgPulse 8s ease-in-out infinite alternate;
}

@keyframes bgPulse {
  0% { opacity: .6; }
  100% { opacity: 1; }
}

/* ─── Navbar ─── */
.main-navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  background: rgba(10,14,26,0.75);
  border-bottom: 1px solid var(--border-glass);
  padding: 0 2rem;
  transition: var(--transition);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.nav-brand .brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent), var(--info));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: 10px;
  font-weight: 500;
  font-size: .925rem;
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: var(--transition);
}

.nav-toggle:hover { background: var(--bg-glass); }

/* ─── Main Content ─── */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
  position: relative;
  z-index: 1;
  min-height: calc(100vh - 70px - 80px);
}

/* ─── Hero Section (Home) ─── */
.hero {
  text-align: center;
  padding: 5rem 1rem;
  animation: fadeUp .7s ease-out;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 50px;
  font-size: .8rem;
  color: var(--accent-light);
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.hero-badge .dot {
  width: 6px; height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 50%, var(--info) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── Page Header ─── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
  animation: fadeUp .5s ease-out;
}

.page-header h1 {
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-header h1 .icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--accent), var(--info));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: 0 4px 15px var(--accent-glow);
}

/* ─── Buttons ─── */
.btn-primary-custom {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .925rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  box-shadow: 0 4px 15px var(--accent-glow);
  font-family: inherit;
}

.btn-primary-custom:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--accent-glow);
  color: #fff;
}

.btn-secondary-custom {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: .925rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  font-family: inherit;
}

.btn-secondary-custom:hover {
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
  color: var(--text-primary);
}

.btn-icon {
  width: 38px; height: 38px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--border-glass);
  background: var(--bg-glass);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  font-size: 1rem;
}

.btn-icon:hover { background: rgba(255,255,255,0.08); color: var(--text-primary); }
.btn-icon.danger:hover { background: rgba(239,68,68,0.15); color: var(--danger); border-color: rgba(239,68,68,0.3); }
.btn-icon.warning:hover { background: rgba(245,158,11,0.15); color: var(--warning); border-color: rgba(245,158,11,0.3); }
.btn-icon.info:hover { background: rgba(59,130,246,0.15); color: var(--info); border-color: rgba(59,130,246,0.3); }

/* ─── Glass Card ─── */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  overflow: hidden;
  animation: fadeUp .6s ease-out;
}

/* ─── Table ─── */
.book-table {
  width: 100%;
  border-collapse: collapse;
}

.book-table thead th {
  padding: 14px 20px;
  text-align: left;
  font-size: .8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-glass);
  background: rgba(255,255,255,0.02);
}

.book-table tbody tr {
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: var(--transition);
}

.book-table tbody tr:last-child { border-bottom: none; }

.book-table tbody tr:hover {
  background: rgba(139,92,246,0.04);
}

.book-table td {
  padding: 16px 20px;
  font-size: .95rem;
  vertical-align: middle;
}

.book-name {
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.book-avatar {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--info));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.badge-page {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  background: rgba(59,130,246,0.1);
  color: var(--info);
  border-radius: 20px;
  font-size: .825rem;
  font-weight: 500;
}

.badge-price {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  background: rgba(16,185,129,0.1);
  color: var(--success);
  border-radius: 20px;
  font-size: .825rem;
  font-weight: 600;
}

.action-btns {
  display: flex;
  gap: 6px;
}

/* ─── Form Styles ─── */
.form-card {
  max-width: 560px;
  margin: 0 auto;
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: rgba(255,255,255,0.06);
}

.form-input::placeholder { color: var(--text-muted); }

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 2rem;
}

.text-danger, .field-validation-error {
  color: var(--danger) !important;
  font-size: .825rem;
  margin-top: 6px;
  display: block;
}

/* ─── Detail Card ─── */
.detail-card {
  max-width: 560px;
  margin: 0 auto;
  padding: 2.5rem;
}

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

.detail-avatar {
  width: 72px; height: 72px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent), var(--info));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: #fff;
  margin: 0 auto 1rem;
  box-shadow: 0 8px 25px var(--accent-glow);
}

.detail-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.detail-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px,1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  text-align: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.stat-value.pages { color: var(--info); }
.stat-value.price { color: var(--success); }
.stat-value.ppp { color: var(--accent-light); }

.stat-label {
  font-size: .8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  font-weight: 500;
}

.detail-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* ─── Footer ─── */
.main-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border-glass);
  padding: 1.5rem 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: .85rem;
  background: rgba(10,14,26,0.5);
  backdrop-filter: blur(10px);
}

.main-footer a {
  color: var(--accent-light);
  text-decoration: none;
  transition: var(--transition);
}

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

/* ─── Empty State ─── */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: .5;
}

.empty-state h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: .5rem;
  color: var(--text-secondary);
}

.empty-state p {
  color: var(--text-muted);
  font-size: .9rem;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}

.fade-in { animation: fadeUp .6s ease-out both; }
.fade-in-delay { animation: fadeUp .6s ease-out .15s both; }

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(10,14,26,0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--border-glass);
  }
  .nav-links.open { display: flex; }
  .main-content { padding: 1.5rem 1rem 3rem; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .book-table thead { display: none; }
  .book-table tbody tr {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 16px;
    border-bottom: 1px solid var(--border-glass);
  }
  .book-table td { padding: 4px 0; }
  .book-table td:first-child { grid-column: 1 / -1; }
  .book-table td:last-child { grid-column: 1 / -1; }
  .form-card, .detail-card { padding: 1.5rem; }
  .hero { padding: 3rem 1rem; }
}

/* ─── Tooltip ─── */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(.8);
  padding: 6px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  font-size: .75rem;
  color: var(--text-primary);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: var(--transition);
}

[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* ─── Search bar ─── */
.search-bar {
  position: relative;
  max-width: 280px;
}

.search-bar input {
  width: 100%;
  padding: 10px 16px 10px 40px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: .9rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.search-bar input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-bar .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: .9rem;
  pointer-events: none;
}

/* ─── Stats row ─── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
  animation: fadeUp .5s ease-out .1s both;
}

.stats-row .stat-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  backdrop-filter: blur(10px);
}

.stats-row .stat-number {
  font-size: 1.6rem;
  font-weight: 700;
}

.stats-row .stat-number.purple { color: var(--accent-light); }
.stats-row .stat-number.blue { color: var(--info); }
.stats-row .stat-number.green { color: var(--success); }

.stats-row .stat-text {
  font-size: .8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  font-weight: 500;
  margin-top: 2px;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ─── Override Bootstrap ─── */
.container, .container-fluid { all: unset; }
.navbar, .navbar-brand, .nav-item, .nav-link { all: unset; }
a { color: inherit; text-decoration: none; }
.table { all: unset; }
.btn { all: unset; cursor: pointer; }
.form-control { all: unset; }
.mb-2, .mb-3, .pb-3 { margin: 0 !important; padding: 0 !important; }