/* ==========================================================================
   TASKFLOW - MODERN RESPONSIVE TASK MANAGEMENT SYSTEM
   Modern, Clean, Lightweight CSS Design System
   ========================================================================== */

:root {
  /* Color Palette - Light Mode */
  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f1f5f9;
  --bg-surface-elevated: #ffffff;
  --bg-input: #f8fafc;
  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;
  --text-inverse: #ffffff;

  /* Brand / Primary */
  --primary: #ea580c;
  --primary-hover: #c2410c;
  --primary-light: #fff7ed;
  --primary-subtle: rgba(234, 88, 12, 0.08);

  /* Status Colors */
  --status-todo-text: #475569;
  --status-todo-bg: #f1f5f9;
  --status-todo-border: #cbd5e1;

  --status-progress-text: #0284c7;
  --status-progress-bg: #e0f2fe;
  --status-progress-border: #bae6fd;

  --status-completed-text: #059669;
  --status-completed-bg: #d1fae5;
  --status-completed-border: #a7f3d0;

  /* Priority Colors */
  --priority-urgent-text: #be123c;
  --priority-urgent-bg: #ffe4e6;
  --priority-urgent-border: #fecdd3;

  --priority-high-text: #b45309;
  --priority-high-bg: #fef3c7;
  --priority-high-border: #fde68a;

  --priority-medium-text: #0284c7;
  --priority-medium-bg: #e0f2fe;
  --priority-medium-border: #bae6fd;

  --priority-low-text: #475569;
  --priority-low-bg: #f1f5f9;
  --priority-low-border: #e2e8f0;

  /* Alert / Danger */
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: #fef2f2;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-dialog: 0 20px 25px -5px rgba(0, 0, 0, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.08);

  /* Geometry */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  /* Layout */
  --max-width: 1200px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* Dark Mode Overrides */
[data-theme="dark"] {
  --bg-app: #090d16;
  --bg-surface: #111827;
  --bg-surface-hover: #1f2937;
  --bg-surface-elevated: #1e293b;
  --bg-input: #1e293b;
  --border-subtle: #1f2937;
  --border-strong: #334155;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --text-inverse: #090d16;

  --primary: #f97316;
  --primary-hover: #fb923c;
  --primary-light: rgba(249, 115, 22, 0.15);
  --primary-subtle: rgba(249, 115, 22, 0.12);

  --status-todo-text: #cbd5e1;
  --status-todo-bg: #1e293b;
  --status-todo-border: #334155;

  --status-progress-text: #38bdf8;
  --status-progress-bg: rgba(56, 189, 248, 0.12);
  --status-progress-border: rgba(56, 189, 248, 0.25);

  --status-completed-text: #34d399;
  --status-completed-bg: rgba(52, 211, 153, 0.12);
  --status-completed-border: rgba(52, 211, 153, 0.25);

  --priority-urgent-text: #fb7185;
  --priority-urgent-bg: rgba(251, 113, 133, 0.12);
  --priority-urgent-border: rgba(251, 113, 133, 0.25);

  --priority-high-text: #fbbf24;
  --priority-high-bg: rgba(251, 191, 36, 0.12);
  --priority-high-border: rgba(251, 191, 36, 0.25);

  --priority-medium-text: #38bdf8;
  --priority-medium-bg: rgba(56, 189, 248, 0.12);
  --priority-medium-border: rgba(56, 189, 248, 0.25);

  --priority-low-text: #94a3b8;
  --priority-low-bg: #1e293b;
  --priority-low-border: #334155;

  --danger-light: rgba(239, 68, 68, 0.12);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.45);
  --shadow-dialog: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

/* ==========================================================================
   CSS Reset & Base
   ========================================================================== */

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-main);
  background-color: var(--bg-app);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}

a {
  color: var(--primary);
  text-decoration: none;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */

.app-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem 1.25rem;
  width: 100%;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.5rem;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 1rem;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  width: 2.25rem;
  height: 2.25rem;
  background: var(--primary);
  color: #ffffff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(234, 88, 12, 0.35);
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Mode / Source Status Badge */
.sync-badge {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

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

.sync-badge.offline .dot {
  background: var(--status-progress-text);
  animation: none;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.9); }
}

/* Buttons */
.btn {
  padding: 0.55rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

.btn-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-muted);
  padding: 0;
}

.btn-icon:hover {
  background: var(--bg-surface-hover);
  color: var(--text-main);
  border-color: var(--border-strong);
}

.btn-danger {
  background: var(--danger);
  color: #ffffff;
}

.btn-danger:hover {
  background: var(--danger-hover);
}

/* ==========================================================================
   Dashboard Metrics
   ========================================================================== */

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.metric-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

.metric-card.active {
  border-color: var(--primary);
  background: var(--primary-light);
}

.metric-info {
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.metric-value {
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-main);
}

.metric-icon-wrap {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.metric-card[data-metric="total"] .metric-icon-wrap {
  background: var(--primary-light);
  color: var(--primary);
}

.metric-card[data-metric="todo"] .metric-icon-wrap {
  background: var(--status-todo-bg);
  color: var(--status-todo-text);
}

.metric-card[data-metric="in_progress"] .metric-icon-wrap {
  background: var(--status-progress-bg);
  color: var(--status-progress-text);
}

.metric-card[data-metric="completed"] .metric-icon-wrap {
  background: var(--status-completed-bg);
  color: var(--status-completed-text);
}

/* ==========================================================================
   Filter & Search Toolbar
   ========================================================================== */

.toolbar {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1rem;
  margin-bottom: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
  justify-content: space-between;
}

.toolbar-search {
  position: relative;
  flex: 1 1 240px;
  min-width: 200px;
}

.search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-subtle);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 0.55rem 2.2rem 0.55rem 2.4rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-input);
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

.search-clear {
  position: absolute;
  right: 0.6rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-subtle);
  padding: 0.2rem;
  border-radius: var(--radius-sm);
  display: none;
}

.search-clear.visible {
  display: flex;
}

.toolbar-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.filter-select {
  padding: 0.55rem 2rem 0.55rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-input);
  font-size: 0.875rem;
  color: var(--text-main);
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.65rem center;
  background-size: 1rem;
}

.filter-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

.view-toggle {
  display: inline-flex;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2px;
  background: var(--bg-input);
}

.view-btn {
  padding: 0.4rem 0.55rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.view-btn.active {
  background: var(--bg-surface);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.btn-reset-filters {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: underline;
  padding: 0.4rem 0.6rem;
  display: none;
}

.btn-reset-filters.visible {
  display: inline-flex;
}

/* ==========================================================================
   Task Section & List Headers
   ========================================================================== */

.tasks-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.15rem;
}

.tasks-count-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
}

.tasks-count-label span {
  color: var(--text-main);
}

/* Task Container (Grid View) */
.tasks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.15rem;
}

/* Task Container (List View) */
.tasks-grid.list-view {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ==========================================================================
   Task Card
   ========================================================================== */

.task-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.task-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

.task-card.is-completed {
  opacity: 0.85;
  background: var(--bg-app);
}

.task-card.is-completed .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

/* Card Header: Quick Checkbox, Title, Actions */
.card-header {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.task-checkbox-wrap {
  padding-top: 0.15rem;
  display: flex;
  align-items: center;
}

.task-checkbox {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-strong);
  cursor: pointer;
  appearance: none;
  outline: none;
  transition: all var(--transition-fast);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface);
}

.task-checkbox:checked {
  background: var(--status-completed-text);
  border-color: var(--status-completed-text);
}

.task-checkbox:checked::after {
  content: "";
  position: absolute;
  width: 0.35rem;
  height: 0.65rem;
  border: solid #ffffff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  margin-top: -1px;
}

.task-header-content {
  flex: 1;
  min-width: 0;
}

.task-title {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-main);
  word-break: break-word;
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  opacity: 0.75;
  transition: opacity var(--transition-fast);
}

.task-card:hover .card-actions {
  opacity: 1;
}

.card-btn {
  padding: 0.35rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.card-btn:hover {
  background: var(--bg-surface-hover);
  color: var(--text-main);
}

.card-btn.delete-btn:hover {
  color: var(--danger);
  background: var(--danger-light);
}

/* Card Body: Description */
.task-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.task-card.expanded .task-desc {
  -webkit-line-clamp: unset;
}

/* Card Badges: Priority, Category, Status */
.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.5rem;
}

.badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  text-transform: capitalize;
}

/* Priority Badges */
.badge-priority-urgent {
  color: var(--priority-urgent-text);
  background: var(--priority-urgent-bg);
  border: 1px solid var(--priority-urgent-border);
}

.badge-priority-high {
  color: var(--priority-high-text);
  background: var(--priority-high-bg);
  border: 1px solid var(--priority-high-border);
}

.badge-priority-medium {
  color: var(--priority-medium-text);
  background: var(--priority-medium-bg);
  border: 1px solid var(--priority-medium-border);
}

.badge-priority-low {
  color: var(--priority-low-text);
  background: var(--priority-low-bg);
  border: 1px solid var(--priority-low-border);
}

/* Category Badge */
.badge-category {
  color: var(--text-muted);
  background: var(--bg-app);
  border: 1px solid var(--border-subtle);
}

/* Status Quick Selector Pill */
.status-pill-select {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 1.4rem 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='currentColor'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.45rem center;
  background-size: 0.75rem;
  outline: none;
  transition: all var(--transition-fast);
}

.status-pill-select.status-todo {
  color: var(--status-todo-text);
  background-color: var(--status-todo-bg);
  border: 1px solid var(--status-todo-border);
}

.status-pill-select.status-in_progress {
  color: var(--status-progress-text);
  background-color: var(--status-progress-bg);
  border: 1px solid var(--status-progress-border);
}

.status-pill-select.status-completed {
  color: var(--status-completed-text);
  background-color: var(--status-completed-bg);
  border: 1px solid var(--status-completed-border);
}

/* Due Date Badge */
.due-badge {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-left: auto;
}

.due-badge.overdue {
  color: var(--priority-urgent-text);
  font-weight: 600;
}

.due-badge.due-today {
  color: var(--priority-high-text);
  font-weight: 600;
}

/* ==========================================================================
   List View Customizations
   ========================================================================== */

.tasks-grid.list-view .task-card {
  flex-direction: row;
  align-items: center;
  padding: 0.85rem 1.15rem;
}

.tasks-grid.list-view .card-header {
  flex: 1;
  align-items: center;
}

.tasks-grid.list-view .task-desc {
  display: none;
}

.tasks-grid.list-view .card-meta {
  margin-top: 0;
  padding-top: 0;
}

/* ==========================================================================
   Empty State & Loading Skeletons
   ========================================================================== */

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3.5rem 1.5rem;
  background: var(--bg-surface);
  border: 2px dashed var(--border-subtle);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
}

.empty-icon {
  width: 3.5rem;
  height: 3.5rem;
  color: var(--text-subtle);
  background: var(--bg-app);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
}

.empty-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 380px;
}

/* Skeleton Loading */
.skeleton-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.skeleton-line {
  height: 1rem;
  background: linear-gradient(90deg, var(--border-subtle) 25%, var(--bg-surface-hover) 50%, var(--border-subtle) 75%);
  background-size: 200% 100%;
  animation: skeleton-pulse 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-pulse {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ==========================================================================
   Native Modal Dialog Styling (<dialog>)
   ========================================================================== */

dialog {
  margin: auto;
  border: none;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  color: var(--text-main);
  box-shadow: var(--shadow-dialog);
  width: min(520px, calc(100vw - 2rem));
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  padding: 0;
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal-close-btn {
  color: var(--text-muted);
  padding: 0.35rem;
  border-radius: var(--radius-sm);
}

.modal-close-btn:hover {
  background: var(--bg-surface-hover);
  color: var(--text-main);
}

.modal-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-input);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

.form-textarea {
  min-height: 90px;
  resize: vertical;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1.15rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-app);
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 1000;
  pointer-events: none;
}

.toast {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 0.75rem 1.1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.875rem;
  pointer-events: auto;
  animation: slide-in 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  max-width: 360px;
}

.toast.toast-success {
  border-left: 4px solid var(--status-completed-text);
}

.toast.toast-error {
  border-left: 4px solid var(--danger);
}

.toast.toast-info {
  border-left: 4px solid var(--primary);
}

@keyframes slide-in {
  from { transform: translateY(1rem); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Mobile Floating Action Button */
.mobile-fab {
  display: none;
  position: fixed;
  bottom: 1.75rem;
  right: 1.5rem;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 6px 16px rgba(234, 88, 12, 0.4);
  z-index: 99;
}

.mobile-fab:hover {
  background: var(--primary-hover);
  transform: scale(1.05);
}

/* ==========================================================================
   Mobile & Tablet Responsiveness
   ========================================================================== */

@media (max-width: 900px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .app-container {
    padding: 1rem 0.85rem 5rem 0.85rem;
  }

  .metrics-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
  }

  .metric-card {
    padding: 0.85rem;
  }

  .metric-value {
    font-size: 1.45rem;
  }

  .metric-icon-wrap {
    width: 2.2rem;
    height: 2.2rem;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
    padding: 0.85rem;
  }

  .toolbar-filters {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }

  .filter-select {
    width: 100%;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .mobile-fab {
    display: flex;
  }

  .btn-new-task-desktop {
    display: none;
  }

  .tasks-grid.list-view .task-card {
    flex-direction: column;
    align-items: stretch;
  }
}