/* ==========================================================================
   SyncBookmark - Design System & Modern UI
   ========================================================================== */

:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(31, 41, 55, 0.6);
  --bg-card-hover: rgba(55, 65, 81, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(99, 102, 241, 0.4);

  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-secondary: #10b981;
  --accent-secondary-hover: #059669;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;

  --badge-chrome: #ea4335;
  --badge-firefox: #ff7139;
  --badge-edge: #0078d7;
  --badge-safari: #0066cc;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);
  --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.5);

  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(99, 102, 241, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(16, 185, 129, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* Header */
.app-header {
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(16px);
  background: rgba(11, 15, 25, 0.8);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 700;
  background: linear-gradient(135deg, #a5b4fc 0%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-primary), #818cf8);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  -webkit-text-fill-color: initial;
  color: white;
  font-size: 1.2rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Status Pill */
.drive-status-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--text-muted);
}

.status-dot.connected {
  background-color: var(--accent-secondary);
  box-shadow: 0 0 10px var(--accent-secondary);
}

.status-dot.disconnected {
  background-color: var(--accent-danger);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-primary-hover));
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
}

.btn-secondary {
  background: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-success {
  background: linear-gradient(135deg, var(--accent-secondary), var(--accent-secondary-hover));
  color: white;
}

.btn-success:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
}

.btn-outline {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-secondary);
}

.btn-outline:hover {
  color: var(--text-primary);
  border-color: var(--text-primary);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

/* Main Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 2rem 0;
}

@media (min-width: 992px) {
  .dashboard-grid {
    grid-template-columns: 320px 1fr;
  }
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Drag and Drop Zone */
.drop-zone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: rgba(17, 24, 39, 0.4);
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
}

.drop-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--accent-primary);
}

.drop-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.drop-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Stats Overview */
.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-box {
  background: rgba(17, 24, 39, 0.6);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: var(--radius-md);
  text-align: center;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 0.2rem;
}

/* Search & Filters */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: center;
}

.search-box {
  flex: 1;
  min-width: 220px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.5rem;
  background: rgba(17, 24, 39, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.filter-badges {
  display: flex;
  gap: 0.5rem;
}

.filter-chip {
  padding: 0.35rem 0.8rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.filter-chip:hover, .filter-chip.active {
  color: white;
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.2);
}

/* Browser Source Badges */
.badge-source {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  color: white;
  text-transform: uppercase;
  display: inline-block;
}

.badge-chrome { background-color: var(--badge-chrome); }
.badge-firefox { background-color: var(--badge-firefox); }
.badge-edge { background-color: var(--badge-edge); }
.badge-safari { background-color: var(--badge-safari); }
.badge-generic { background-color: var(--accent-primary); }

/* Bookmark List & Tree View */
.bookmark-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 600px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.bookmark-list::-webkit-scrollbar {
  width: 6px;
}

.bookmark-list::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 10px;
}

.bookmark-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: rgba(17, 24, 39, 0.5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);

}

.bookmark-item:hover {
  background: rgba(31, 41, 55, 0.8);
  border-color: var(--border-highlight);
  transform: translateX(3px);
}

.bm-main {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  overflow: hidden;
}

.bm-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.bm-details {
  overflow: hidden;
}

.bm-title {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-decoration: none;
  display: block;
}

.bm-title:hover {
  color: #a5b4fc;
}

.bm-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.2rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.bm-url {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 300px;
}

.bm-tags {
  display: flex;
  gap: 0.3rem;
}

.bm-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Folder Breadcrumb */
.folder-pill {
  background: rgba(255, 255, 255, 0.06);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* Modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 520px;
  padding: 2rem;
  box-shadow: 0 20px 50px rgba(0,0,0,0.8);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 0.65rem 0.75rem;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.85rem;
  outline: none;
  transition: var(--transition);
}

select.form-input {
  cursor: pointer;
  text-overflow: clip;
  white-space: normal;
  padding-right: 0.5rem;
}

select.form-input option {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  padding: 0.5rem;
  font-size: 0.85rem;
}

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

.form-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 2000;
}

.toast {
  padding: 0.85rem 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.success { border-left-color: var(--accent-secondary); }
.toast.error { border-left-color: var(--accent-danger); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}