/* Theme: Fluent (Original) */
:root {
  /* Modal Variables */
  --modal-bg: var(--header-bg); /* Use same glass/solid color as header/modal */
  --bg-color: #0f0f0f;
  --bg-image: url("https://images.unsplash.com/photo-1618005182384-a83a8bd57fbe?q=80&w=2564&auto=format&fit=crop");

  /* Glassmorphism Layers - DARK (Default) */
  --glass-base: rgba(20, 20, 20, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-highlight: rgba(255, 255, 255, 0.05);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);

  --header-bg: rgba(20, 20, 20, 0.75);

  /* Container & Items */
  --container-bg: rgba(30, 30, 30, 0.4);
  --container-hover-bg: rgba(40, 40, 40, 0.6);
  --container-active-border: rgba(255, 255, 255, 0.2);

  --item-bg: rgba(255, 255, 255, 0.03);
  --item-hover-bg: rgba(255, 255, 255, 0.1);
  --item-active-bg: rgba(255, 255, 255, 0.15);

  /* Typography */
  --text-primary: #f5f5f5;
  --text-secondary: rgba(245, 245, 245, 0.65);
  --text-muted: rgba(245, 245, 245, 0.4);
  --text-inverse: #101010;

  /* Accents */
  --accent-color: #60cdff;
  --accent-hover: #7aceff;
  --accent-glow: rgba(96, 205, 255, 0.3);

  --danger-color: #ff4d4f;

  /* UI Tokens */
  --radius-xl: 16px;
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 4px;

  /* Scrollbar */
  --scrollbar-thumb: rgba(255, 255, 255, 0.2);
  --scrollbar-thumb-hover: rgba(255, 255, 255, 0.3);

  --font-family: "Segoe UI Variable Display", "Segoe UI", system-ui,
    -apple-system, sans-serif;
}

/* Global scrollbar style handled in core.css */

/* Light Theme Overrides */
:root[data-theme="light"] {
  --bg-color: #f3f3f3;
  --glass-base: rgba(255, 255, 255, 0.65);

  --scrollbar-thumb: rgba(0, 0, 0, 0.2);
  --scrollbar-thumb-hover: rgba(0, 0, 0, 0.3);

  --glass-border: rgba(0, 0, 0, 0.15);
  --glass-highlight: rgba(255, 255, 255, 0.4);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);

  --header-bg: rgba(255, 255, 255, 0.85);

  --container-bg: rgba(255, 255, 255, 0.7);
  --container-hover-bg: rgba(255, 255, 255, 0.85);
  --container-active-border: rgba(0, 0, 0, 0.2);

  --item-bg: rgba(0, 0, 0, 0.03);
  --item-hover-bg: rgba(0, 0, 0, 0.06);
  --item-active-bg: rgba(0, 0, 0, 0.1);

  --text-primary: #1a1a1a;
  --text-secondary: rgba(0, 0, 0, 0.6);
  --text-muted: rgba(0, 0, 0, 0.4);
  --text-inverse: #f5f5f5;

  --accent-color: #0078d4;
  --accent-hover: #106ebe;
  --accent-glow: rgba(0, 120, 212, 0.2);
}

/* Common Visuals */
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

.fluent-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  padding: 8px 20px;
  min-height: 38px;
  line-height: 1.2;
  border-radius: var(--radius-sm); /* Matches radius-md (12px) - 8px padding */
  transition: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}
.fluent-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
.fluent-btn:active {
  background: rgba(255, 255, 255, 0.02);
  transform: translateY(1px) scale(0.98);
}
.fluent-btn.primary {
  background: var(--accent-color);
  color: #000;
  border: 1px solid transparent;
}
.fluent-btn.primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 15px var(--accent-glow);
}
.fluent-btn.danger {
  background: transparent;
  border: 1px solid var(--danger-color);
  color: var(--danger-color);
}
.fluent-btn.danger:hover {
  background: rgba(255, 77, 79, 0.1);
}

.icon-only-small {
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}
.icon-only-small:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.search-icon {
  opacity: 0.5;
  transition: opacity 0.2s;
}
.search-wrapper.focused .search-icon {
  opacity: 1;
  filter: drop-shadow(0 0 4px var(--accent-color));
}

#search-input {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 4px;
  color: var(--text-primary);
  transition: background 0.1s, border-bottom 0.1s;
}
#search-input:hover {
  background: rgba(255, 255, 255, 0.09);
}
#search-input:focus {
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 7px; /* Compensate for 2px border */
}

:root[data-theme="light"] .fluent-btn {
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0, 0, 0, 0.08);
}
:root[data-theme="light"] .fluent-btn:hover {
  background: rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.15);
}
:root[data-theme="light"] .fluent-btn.primary {
  color: #fff;
}
:root[data-theme="light"] .fluent-btn.danger {
  background: transparent;
  border: 1px solid var(--danger-color);
  color: var(--danger-color);
}
:root[data-theme="light"] .fluent-btn.danger:hover {
  background: rgba(255, 77, 79, 0.1);
}

:root[data-theme="light"] .icon-only-small:hover {
  background: rgba(0, 0, 0, 0.08);
}

:root[data-theme="light"] #search-input {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid rgba(0, 0, 0, 0.4);
}
:root[data-theme="light"] #search-input:focus {
  background: #ffffff;
}

.app-header {
  background: var(--header-bg);
  backdrop-filter: blur(12px) saturate(120%);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); /* 12px radius */
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  padding: 8px; /* Rule: 12px (outer) - 4px (inner) = 8px padding */
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.bookmark-container {
  background: var(--container-bg);
  border: 1px solid var(--glass-border);
  border-top: 1px solid rgba(255, 255, 255, 0.15); /* Top highlight */
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(12px) saturate(110%);
  -webkit-backdrop-filter: blur(12px) saturate(110%);
  border-radius: var(--radius-lg);
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.2s;
}
.bookmark-container:hover {
  border-color: var(--container-active-border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
}
.bookmark-container.dragging {
  opacity: 0.8;
  transform: scale(0.98) rotateX(2deg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.container-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.drag-handle {
  color: var(--text-secondary);
}
.container-title {
  color: var(--text-primary);
  border-radius: var(--radius-sm);
}
.container-title:focus {
  outline: 2px solid var(--accent-color);
  background: rgba(0, 0, 0, 0.2);
}
.container-icon {
  color: var(--text-primary);
  border-radius: var(--radius-sm);
}
.container-icon:focus {
  outline: 2px solid var(--accent-color);
  background: rgba(0, 0, 0, 0.2);
}
.empty-state {
  color: var(--text-secondary);
  border: 2px dashed rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
}

.bookmark-item {
  background: var(--item-bg);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.bookmark-item:hover {
  background: var(--item-hover-bg);
  border-color: var(--glass-border);
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(255, 255, 255, 0.1) inset;
  z-index: 1;
}
.bookmark-item:active {
  transform: translateY(-1px);
  background: var(--item-active-bg);
}
.bookmark-item.dragging {
  opacity: 0.4;
}
#settings-bg-dim {
  width: 100%;
}

#settings-file-base {
  width: 100%;
  box-sizing: border-box;
  background: var(--item-bg);
  border: 1px solid var(--glass-border);
  border-bottom: 2px solid var(--glass-border);
  color: var(--text-primary);
  padding: 12px 14px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-family: inherit;
  font-size: 14px;
  transition: all 0.2s;
}
#settings-file-base:hover {
  background: var(--item-hover-bg);
  border-bottom-color: var(--text-secondary);
}
#settings-file-base:focus {
  background: var(--item-active-bg);
  border-bottom-color: var(--accent-color);
  outline: none;
}
.bookmark-label {
  color: var(--text-primary);
}

.bookmark-actions button {
  background: rgba(0, 0, 0, 0.6);
  color: white;
}
.bookmark-actions button:hover {
  background: var(--accent-color);
}
.bookmark-actions .delete-btn:hover {
  background: var(--danger-color);
}

.modal-overlay {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.modal-content {
  background: var(--header-bg); /* Adaptive background */
  border: 1px solid var(--glass-border);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  padding: 0;
}

.modal-content h3 {
  padding: 24px 24px 8px 24px;
  margin: 0;
}

.modal-body {
  padding: 8px 24px 16px 24px;
}

.modal-actions {
  padding: 16px 24px 24px 24px;
  background: rgba(0, 0, 0, 0.05); /* Subtle distinction for footer */
}
:root[data-theme="light"] .modal-actions {
  background: rgba(0, 0, 0, 0.02);
}

.form-group label {
  color: var(--text-secondary);
}
.form-group input:not([type="range"]) {
  background: var(--item-bg); /* Adaptive input bg */
  border: 1px solid var(--glass-border);
  border-bottom: 2px solid var(--glass-border);
  color: var(--text-primary); /* Adaptive text */
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  height: 42px;
  padding: 0 12px;
  font-size: 14px;
  transition: all 0.2s;
}
.form-group input:not([type="range"]):hover {
  background: var(--item-hover-bg);
  border-bottom-color: var(--text-secondary);
}
.form-group input:not([type="range"]):focus {
  background: var(--item-active-bg);
  border-bottom-color: var(--accent-color);
  color: var(--text-primary);
}

.type-card {
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  padding: 16px 12px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  height: 100%;
}
.type-option:hover .type-card {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}
.type-option input:checked + .type-card {
  background: rgba(96, 205, 255, 0.1);
  border-color: var(--accent-color);
  color: var(--accent-color);
  box-shadow: 0 0 0 1px var(--accent-color) inset;
}

/* Light Mode: Type Cards */
:root[data-theme="light"] .type-card {
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: rgba(0, 0, 0, 0.03);
}
:root[data-theme="light"] .type-option:hover .type-card {
  background: rgba(0, 0, 0, 0.06);
  border-color: rgba(0, 0, 0, 0.15);
}
:root[data-theme="light"] .type-option input:checked + .type-card {
  background: rgba(0, 120, 212, 0.1);
}

.drag-over-container::after {
  background: rgba(96, 205, 255, 0.1);
  border: 3px dashed var(--accent-color);
  border-radius: var(--radius-lg);
  color: var(--accent-color);
  box-shadow: 0 0 20px rgba(96, 205, 255, 0.2);
}

.drop-hint-new-group {
  border: 3px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.02);
}
.drop-hint-new-group.active {
  border-color: var(--accent-color);
  background: rgba(96, 205, 255, 0.1);
  color: var(--accent-color);
}
.drop-hint-new-group .hint-icon {
  background: rgba(255, 255, 255, 0.1);
}

/* Icon Inversion for Light Mode */
:root[data-theme="light"] .fluent-btn img,
:root[data-theme="light"] .search-icon,
:root[data-theme="light"] .container-header button img,
:root[data-theme="light"] .drag-handle img,
:root[data-theme="light"] .modal-content img {
  filter: brightness(0.2);
}

.toast {
  background: rgba(30, 30, 30, 0.9);
  color: white;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.toast-action-btn {
  color: var(--accent-color);
  border-radius: var(--radius-sm);
}
.toast-action-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Toggle Switch - FluentOverride */
.toggle-switch {
  width: 40px;
  height: 20px;
}
.slider {
  background-color: transparent;
  border-radius: 10px;
  border: 1px solid #8b8b8b;
}
.slider:before {
  height: 12px;
  width: 12px;
  left: 3px;
  bottom: 3px;
  background-color: #8b8b8b;
  border-radius: 50%;
  box-shadow: none;
}
input:checked + .slider {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
}
input:checked + .slider:before {
  transform: translateX(20px);
  background-color: white;
}
input:checked + .slider:hover {
  background-color: var(--accent-hover);
}

:root[data-theme="dark"] .slider {
  border-color: #ffffff;
}
:root[data-theme="dark"] .slider:before {
  background-color: #ffffff;
}