:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --bg-light: #f0f4f8;
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(0, 0, 0, 0.1);
  --text-main: #1e293b;
  --text-muted: #64748b;
  --accent: #3b82f6;
  --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.08);
}

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

body {
  background-color: var(--bg-light);
  color: var(--text-main);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 90% 80%, rgba(118, 75, 162, 0.15) 0%, transparent 50%);
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
}

.nav-glass {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.btn-premium {
  background: var(--primary-gradient);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-premium:hover {
  opacity: 0.9;
  transform: scale(1.02);
  color: white;
}

.search-container {
  max-width: 600px;
  margin: 40px auto;
  position: relative;
}

.input-glass {
  width: 100%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 15px 25px;
  border-radius: 14px;
  color: var(--text-main);
  font-size: 1.1rem;
  outline: none;
  transition: border-color 0.3s;
}

.input-glass:focus {
  border-color: var(--accent);
}

/* responsive grid */
.bookmark-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  padding: 20px;
}

.category-header {
  border-left: 4px solid var(--accent);
  padding-left: 15px;
  margin: 40px 0 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.bookmark-item {
  padding: 20px;
}

.bookmark-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--accent);
  text-decoration: none;
}

.bookmark-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.badge-count {
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 8px;
  border-radius: 8px;
  margin-left: 8px;
}

/* mobile adjustments */
@media (max-width: 600px) {
  .bookmark-grid {
    grid-template-columns: 1fr;
  }

  .category-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

/* premium forms */
.premium-form {
  max-width: 800px;
  margin: 20px auto;
  padding: 30px;
}

.form-group {
  margin-bottom: 20px;
}

.control-label {
  display: block;
  margin-bottom: 8px;
  color: var(--accent);
  font-weight: 600;
}

.text-danger {
  color: #ff4444;
  font-size: 0.85rem;
  margin-top: 5px;
  display: block;
}

/* premium tables */
.premium-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 10px;
  margin-top: 20px;
}

.premium-table th {
  padding: 15px;
  text-align: left;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 1px;
}

.premium-table td {
  padding: 20px 15px;
  background: var(--glass-bg);
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
}

.premium-table tr td:first-child {
  border-left: 1px solid var(--glass-border);
  border-radius: 12px 0 0 12px;
}

.premium-table tr td:last-child {
  border-right: 1px solid var(--glass-border);
  border-radius: 0 12px 12px 0;
}