/* ==========================================================================
   Zenith TaskFlow Design System
   Modern Dark/Light Mode, Glassmorphism, Fluid Typography & Micro-animations
   ========================================================================== */

:root {
  /* Color Palette - Dark Theme (Default) */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-input: rgba(15, 23, 42, 0.65);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-card: rgba(255, 255, 255, 0.12);
  --border-focus: #6366f1;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* Accent Gradients */
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --accent-gradient-glow: linear-gradient(135deg, rgba(99, 102, 241, 0.3) 0%, rgba(168, 85, 247, 0.3) 100%);

  --emerald: #10b981;
  --emerald-bg: rgba(16, 185, 129, 0.12);
  --emerald-border: rgba(16, 185, 129, 0.3);

  --amber: #f59e0b;
  --amber-bg: rgba(245, 158, 11, 0.12);
  --amber-border: rgba(245, 158, 11, 0.3);

  --rose: #f43f5e;
  --rose-bg: rgba(244, 63, 94, 0.12);
  --rose-border: rgba(244, 63, 94, 0.3);

  --sky: #0ea5e9;
  --sky-bg: rgba(14, 165, 233, 0.12);
  --sky-border: rgba(14, 165, 233, 0.3);

  --purple: #a855f7;
  --purple-bg: rgba(168, 85, 247, 0.12);
  --purple-border: rgba(168, 85, 247, 0.3);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 36px -6px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);

  /* Geometry & Motion */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 9999px;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Light Mode Overrides */
body.theme-light {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --bg-glass: rgba(0, 0, 0, 0.02);
  --bg-input: #f1f5f9;

  --border-subtle: rgba(0, 0, 0, 0.06);
  --border-card: rgba(0, 0, 0, 0.1);
  --border-focus: #4f46e5;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 40px -8px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: dark light;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Ambient glow backgrounds */
.ambient-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.15;
  transition: opacity var(--transition-normal);
}
.glow-1 {
  top: -100px;
  left: 20%;
  background: radial-gradient(circle, #6366f1 0%, transparent 70%);
}
.glow-2 {
  bottom: -150px;
  right: 15%;
  background: radial-gradient(circle, #a855f7 0%, transparent 70%);
}

/* App Layout Container */
.app-layout {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-bottom: 0.5rem;
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: var(--shadow-glow);
  flex-shrink: 0;
  transition: transform var(--transition-spring);
}
.brand-logo:hover {
  transform: rotate(5deg) scale(1.05);
}

.brand-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.badge-go {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  background: rgba(0, 172, 215, 0.15);
  color: #00add8;
  border: 1px solid rgba(0, 172, 215, 0.35);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.02em;
}

.brand-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* Search Box */
.search-box {
  position: relative;
  display: flex;
  align-items: center;
  min-width: 280px;
}
.search-box input {
  width: 100%;
  padding: 0.65rem 2.8rem 0.65rem 2.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-pill);
  color: var(--text-primary);
  font-size: 0.875rem;
  backdrop-filter: blur(12px);
  outline: none;
  transition: all var(--transition-fast);
}
.search-box input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  background: var(--bg-secondary);
}
.search-icon {
  position: absolute;
  left: 0.85rem;
  color: var(--text-muted);
  pointer-events: none;
}
.key-shortcut {
  position: absolute;
  right: 0.85rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  background: var(--border-subtle);
  border: 1px solid var(--border-card);
  border-radius: 4px;
  color: var(--text-muted);
  pointer-events: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
  filter: brightness(1.08);
}
.key-shortcut-btn {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border: 1px solid var(--border-card);
}
.btn-secondary:hover {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
}
.btn-ghost:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-card);
}
.danger-ghost:hover {
  color: var(--rose);
  border-color: var(--rose-border);
  background: var(--rose-bg);
}

.btn-danger {
  background: var(--rose);
  color: #fff;
  box-shadow: 0 4px 14px rgba(244, 63, 94, 0.35);
}
.btn-danger:hover {
  filter: brightness(1.1);
  box-shadow: 0 6px 18px rgba(244, 63, 94, 0.5);
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(12px);
}
.icon-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

/* Theme Toggle Icons */
body.theme-dark .icon-sun { display: block; }
body.theme-dark .icon-moon { display: none; }
body.theme-light .icon-sun { display: none; }
body.theme-light .icon-moon { display: block; }

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}
.stat-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-info {
  display: flex;
  flex-direction: column;
}
.stat-label {
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}
.stat-value {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-top: 0.2rem;
}
.text-emerald {
  color: var(--emerald);
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.stat-icon-blue {
  background: var(--sky-bg);
  color: var(--sky);
  border: 1px solid var(--sky-border);
}
.stat-icon-amber {
  background: var(--amber-bg);
  color: var(--amber);
  border: 1px solid var(--amber-border);
}
.stat-icon-emerald {
  background: var(--emerald-bg);
  color: var(--emerald);
  border: 1px solid var(--emerald-border);
}

.progress-ring-mini {
  width: 70px;
  display: flex;
  align-items: center;
}
.progress-bar-linear {
  width: 100%;
  height: 8px;
  background: var(--border-subtle);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: var(--radius-pill);
  transition: width 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Quick Add Bar */
.quick-add-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 0.75rem 1rem;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.quick-add-card:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2), var(--shadow-md);
}

.quick-add-form {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.quick-input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 240px;
}
.quick-sparkle {
  font-size: 1.1rem;
}
.quick-input-wrap input {
  width: 100%;
  background: transparent;
  border: none;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  outline: none;
}
.quick-input-wrap input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.quick-options {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

/* Dropdown styling */
.select-wrapper {
  position: relative;
  display: inline-block;
}
.select-wrapper select,
input[type="date"] {
  appearance: none;
  -webkit-appearance: none;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.45rem 1.8rem 0.45rem 0.75rem;
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  outline: none;
  transition: all var(--transition-fast);
}
.select-wrapper::after {
  content: "▾";
  position: absolute;
  right: 0.65rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  font-size: 0.8rem;
}
.select-wrapper select:hover,
input[type="date"]:hover {
  border-color: var(--border-card);
  color: var(--text-primary);
}
.select-wrapper select:focus,
input[type="date"]:focus {
  border-color: var(--border-focus);
  color: var(--text-primary);
}

input[type="date"] {
  padding-right: 0.75rem;
}

.small-select select {
  font-size: 0.8rem;
  padding: 0.45rem 1.7rem 0.45rem 0.7rem;
  border-radius: var(--radius-pill);
}

.quick-submit-btn {
  padding: 0.45rem 1.1rem;
  font-size: 0.825rem;
}

/* Toolbar & Filters */
.toolbar-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 0.25rem;
}

.filter-tabs {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-pill);
  padding: 0.25rem;
  gap: 0.2rem;
  backdrop-filter: blur(12px);
}

.filter-tab {
  background: transparent;
  border: none;
  padding: 0.4rem 0.95rem;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}
.filter-tab:hover {
  color: var(--text-primary);
}
.filter-tab.active {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.tab-badge {
  font-size: 0.72rem;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.18);
  font-family: 'JetBrains Mono', monospace;
}
.filter-tab.active .tab-badge {
  background: rgba(255, 255, 255, 0.28);
  color: #fff;
}

.toolbar-controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

/* Task List */
.task-list-section {
  position: relative;
  min-height: 250px;
}

.task-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

/* Task Card Item */
.task-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}
.task-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--accent-primary);
  opacity: 0.5;
  transition: opacity var(--transition-fast), background var(--transition-fast);
}
.task-item.priority-high::before {
  background: var(--rose);
  opacity: 1;
}
.task-item.priority-medium::before {
  background: var(--amber);
  opacity: 1;
}
.task-item.priority-low::before {
  background: var(--emerald);
  opacity: 1;
}

.task-item:hover {
  border-color: var(--border-focus);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Completed task state */
.task-item.completed {
  opacity: 0.65;
  background: rgba(17, 24, 39, 0.45);
}
body.theme-light .task-item.completed {
  background: rgba(241, 245, 249, 0.7);
}
.task-item.completed .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}
.task-item.completed::before {
  opacity: 0.25;
}

/* Checkbox Style */
.checkbox-wrap {
  position: relative;
  padding-top: 0.15rem;
  flex-shrink: 0;
}
.custom-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border: 2px solid var(--text-muted);
  border-radius: 6px;
  cursor: pointer;
  background: transparent;
  outline: none;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}
.custom-checkbox:hover {
  border-color: var(--accent-primary);
  transform: scale(1.08);
}
.custom-checkbox:checked {
  background: var(--accent-gradient);
  border-color: transparent;
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
}
.custom-checkbox:checked::after {
  content: "";
  display: block;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg) translate(-1px, -1px);
}

/* Task Card Body */
.task-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.task-header-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.task-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
  word-break: break-word;
  cursor: pointer;
  transition: color var(--transition-fast);
}
.task-title:hover {
  color: var(--accent-primary);
}

.task-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.45;
  word-break: break-word;
  white-space: pre-line;
}

/* Task Meta Chips */
.task-meta-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 0.25rem;
  font-size: 0.775rem;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Category Badges */
.chip-category {
  background: var(--bg-glass);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}
.category-work { background: var(--amber-bg); color: var(--amber); border-color: var(--amber-border); }
.category-backend { background: var(--sky-bg); color: var(--sky); border-color: var(--sky-border); }
.category-frontend { background: var(--emerald-bg); color: var(--emerald); border-color: var(--emerald-border); }
.category-design { background: var(--purple-bg); color: var(--purple); border-color: var(--purple-border); }
.category-health { background: var(--rose-bg); color: var(--rose); border-color: var(--rose-border); }
.category-study { background: rgba(99, 102, 241, 0.12); color: #818cf8; border-color: rgba(99, 102, 241, 0.3); }

/* Priority Badges */
.chip-priority {
  font-size: 0.72rem;
  text-transform: uppercase;
}
.priority-chip-high {
  background: var(--rose-bg);
  color: var(--rose);
  border: 1px solid var(--rose-border);
}
.priority-chip-medium {
  background: var(--amber-bg);
  color: var(--amber);
  border: 1px solid var(--amber-border);
}
.priority-chip-low {
  background: var(--emerald-bg);
  color: var(--emerald);
  border: 1px solid var(--emerald-border);
}

/* Due Date Badge */
.chip-date {
  background: var(--bg-glass);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  font-family: 'JetBrains Mono', monospace;
}
.chip-date.is-overdue {
  background: var(--rose-bg);
  color: var(--rose);
  border-color: var(--rose-border);
  font-weight: 700;
}
.chip-date.is-today {
  background: var(--amber-bg);
  color: var(--amber);
  border-color: var(--amber-border);
  font-weight: 700;
}

/* Task Actions (Buttons inside card) */
.task-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  opacity: 0.85;
  transition: opacity var(--transition-fast);
}
.task-item:hover .task-actions {
  opacity: 1;
}

.action-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.action-btn:hover {
  background: var(--bg-card);
  border-color: var(--border-card);
  color: var(--text-primary);
}
.action-btn.edit-btn:hover {
  color: var(--accent-primary);
  border-color: var(--border-focus);
}
.action-btn.delete-btn:hover {
  color: var(--rose);
  border-color: var(--rose-border);
  background: var(--rose-bg);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 1.5rem;
  background: var(--bg-card);
  border: 1px dashed var(--border-card);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.empty-illustration {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}
.empty-title {
  font-size: 1.25rem;
  font-weight: 700;
}
.empty-desc {
  max-width: 420px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Loading Spinner */
.loading-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 750ms linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.hidden {
  display: none !important;
}

/* Footer */
.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.footer-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald);
  box-shadow: 0 0 8px var(--emerald);
  display: inline-block;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}
.sep {
  opacity: 0.4;
}
.footer-shortcuts {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}
.footer-shortcuts kbd {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  padding: 0.1rem 0.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  color: var(--text-secondary);
}

/* ==========================================================================
   Modern Dialog Modal Styles
   Native <dialog> with Glassmorphism Backdrop and Enter/Exit Transitions
   ========================================================================== */

dialog.modern-dialog {
  border: none;
  background: transparent;
  padding: 0;
  max-width: 540px;
  width: 90vw;
  margin: auto;
  border-radius: var(--radius-lg);
  overflow: visible;
  outline: none;
}

dialog.modern-dialog::backdrop {
  background: rgba(3, 7, 18, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: backdropFadeIn 250ms ease forwards;
}

@keyframes backdropFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

dialog.modern-dialog[open] .dialog-content {
  animation: dialogSlideUp 300ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes dialogSlideUp {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.dialog-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  color: var(--text-primary);
}

.dialog-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.dialog-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}
.dialog-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient-glow);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(99, 102, 241, 0.3);
}
.dialog-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.dialog-subtitle {
  font-size: 0.825rem;
  color: var(--text-secondary);
}

.close-dialog-btn {
  width: 34px;
  height: 34px;
}

/* Modal Form Controls */
.modal-form {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.form-row {
  display: flex;
  gap: 1rem;
}
.flex-1 {
  flex: 1;
}

.form-label {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.required-star {
  color: var(--rose);
}

.form-input {
  width: 100%;
  padding: 0.7rem 0.85rem;
  background: var(--bg-input);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: all var(--transition-fast);
}
.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  background: var(--bg-card);
}
.form-textarea {
  resize: vertical;
  min-height: 80px;
}

/* Toggle Switch */
.toggle-checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  cursor: pointer;
  padding: 0.6rem 0.2rem;
  user-select: none;
}
.toggle-checkbox-label input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.toggle-switch {
  width: 40px;
  height: 22px;
  background: var(--border-card);
  border-radius: var(--radius-pill);
  position: relative;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}
.toggle-switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: #ffffff;
  border-radius: 50%;
  transition: transform var(--transition-spring);
}
.toggle-checkbox-label input:checked + .toggle-switch {
  background: var(--emerald);
}
.toggle-checkbox-label input:checked + .toggle-switch::after {
  transform: translateX(18px);
}
#status-toggle-text {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.dialog-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

/* Confirm Dialog Variant */
.confirm-dialog .dialog-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
}
.confirm-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--rose-bg);
  color: var(--rose);
  border: 1px solid var(--rose-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}
.confirm-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.confirm-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}
.text-highlight {
  color: var(--text-primary);
}

/* ==========================================================================
   Toast Notification System
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  min-width: 280px;
  max-width: 400px;
  animation: toastIn 300ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
  transition: opacity 250ms ease, transform 250ms ease;
}
.toast.toast-exit {
  opacity: 0;
  transform: translateX(30px);
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.toast-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}
.toast-msg {
  flex: 1;
  word-break: break-word;
}
.toast-success {
  border-left: 4px solid var(--emerald);
}
.toast-error {
  border-left: 4px solid var(--rose);
}
.toast-info {
  border-left: 4px solid var(--sky);
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .app-layout {
    padding: 1.25rem 1rem 2rem;
  }
  .app-header {
    flex-direction: column;
    align-items: stretch;
  }
  .header-actions {
    justify-content: space-between;
  }
  .search-box {
    min-width: 100%;
  }
  .form-row {
    flex-direction: column;
    gap: 1rem;
  }
  .toolbar-section {
    flex-direction: column;
    align-items: stretch;
  }
  .filter-tabs {
    justify-content: center;
  }
  .toolbar-controls {
    justify-content: space-between;
  }
  .quick-options {
    width: 100%;
    justify-content: space-between;
  }
  .toast-container {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
  }
  .toast {
    min-width: 100%;
  }
}