/**
 * FocusFlow PWA Stylesheet
 * Optimized for Android, iPadOS & macOS Golden Gate
 */

:root {
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --bg-tertiary: #334155;
  --bg-card: #1E293B;
  --bg-input: #0F172A;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #3B82F6;
  
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  --accent-primary: #3B82F6;
  --accent-primary-hover: #2563EB;
  --accent-success: #10B981;
  --accent-warning: #F59E0B;
  --accent-danger: #EF4444;
  --accent-purple: #8B5CF6;

  --sidebar-width: 290px;
  --header-height: 64px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  user-select: none;
}

input, textarea, select, button {
  font-family: inherit;
  user-select: auto;
}

/* App Layout Grid */
.app-container {
  display: flex;
  height: 100vh;
  height: 100dvh;
  width: 100vw;
  overflow: hidden;
  position: relative;
}

/* ==========================================
   SIDEBAR (Roles & Projects)
   ========================================== */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  padding-top: calc(var(--safe-top) + 12px);
  padding-bottom: calc(var(--safe-bottom) + 16px);
  padding-left: calc(var(--safe-left) + 16px);
  padding-right: 16px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 50;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #60A5FA, #A78BFA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sidebar-section {
  margin-bottom: 24px;
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px 8px 4px;
}

.sidebar-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.sidebar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  min-height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.sidebar-item:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.sidebar-item.active {
  background-color: rgba(59, 130, 246, 0.18);
  color: #93C5FD;
  font-weight: 600;
}

.sidebar-item-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.sidebar-item-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-item-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.counter-badge {
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 12px;
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  font-weight: 500;
}

.sidebar-item.active .counter-badge {
  background-color: rgba(59, 130, 246, 0.3);
  color: #BFDBFE;
}

.role-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.project-dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  border: 2px solid;
  flex-shrink: 0;
}

.project-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.project-deadline-pill {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.sidebar-empty {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 8px 12px;
  font-style: italic;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ==========================================
   MAIN CONTENT AREA
   ========================================== */
.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
  height: 100dvh;
  background-color: var(--bg-primary);
  position: relative;
}

.top-bar {
  height: var(--header-height);
  padding-top: var(--safe-top);
  padding-left: 20px;
  padding-right: calc(var(--safe-right) + 20px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 20;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.toggle-sidebar-btn {
  display: none; /* Desktop default */
}

.view-titles {
  display: flex;
  flex-direction: column;
}

.current-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.current-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sync-status-badge {
  font-size: 0.8rem;
  padding: 4px 10px;
  border-radius: 20px;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.sync-status-badge.syncing {
  background-color: rgba(59, 130, 246, 0.15);
  color: #60A5FA;
}

.sync-status-badge.connected {
  background-color: rgba(16, 185, 129, 0.15);
  color: #34D399;
}

.sync-status-badge.error {
  background-color: rgba(239, 68, 68, 0.15);
  color: #F87171;
}

/* Filter & Search Bar */
.control-bar {
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  flex-wrap: wrap;
}

.filter-tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-secondary);
  padding: 4px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.filter-tab {
  padding: 6px 14px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.filter-tab:hover {
  color: var(--text-primary);
}

.filter-tab.active {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.search-box {
  position: relative;
  min-width: 240px;
  flex: 1;
  max-width: 360px;
}

.search-box input {
  width: 100%;
  padding: 8px 12px 8px 36px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.85rem;
  transition: border-color 0.15s ease;
}

.search-box input:focus {
  outline: none;
  border-color: var(--border-focus);
}

.search-icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.85rem;
  pointer-events: none;
}

/* Tasks Scrollable Container */
.tasks-scroll-area {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 20px 24px calc(var(--safe-bottom) + 80px) 24px;
}

.tasks-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
}

/* ==========================================
   TASK CARD
   ========================================== */
.task-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  box-shadow: var(--shadow-sm);
}

.task-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-md);
}

.task-card.timer-active {
  border-color: rgba(59, 130, 246, 0.6);
  box-shadow: 0 0 16px rgba(59, 130, 246, 0.15);
}

.task-card.is-completed {
  opacity: 0.6;
}

.task-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.task-checkbox-label {
  display: flex;
  align-items: center;
  cursor: pointer;
  padding-top: 2px;
}

.task-status-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--text-muted);
  border-radius: 6px;
  background-color: transparent;
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease;
}

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

.task-status-checkbox:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 13px;
  font-weight: 700;
}

.task-title-area {
  flex: 1;
  min-width: 0;
}

.task-title {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
}

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

.task-description {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 4px;
  line-height: 1.4;
  white-space: pre-line;
}

.task-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Badges */
.task-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
  align-items: center;
}

.badge {
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.badge-project {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.badge-duration {
  background-color: rgba(139, 92, 246, 0.15);
  color: #C4B5FD;
}

.badge-overdue {
  background-color: rgba(239, 68, 68, 0.18);
  color: #FCA5A5;
  font-weight: 600;
}

.badge-today {
  background-color: rgba(245, 158, 11, 0.18);
  color: #FCD34D;
  font-weight: 600;
}

.badge-tomorrow {
  background-color: rgba(59, 130, 246, 0.18);
  color: #93C5FD;
}

.badge-upcoming {
  background-color: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}

.badge-gtasks {
  background-color: rgba(16, 185, 129, 0.15);
  color: #6EE7B7;
}

/* Subtasks inside task card */
.subtasks-container {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

.subtasks-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.subtasks-progress-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.subtasks-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.subtasks-progress-bar {
  width: 80px;
  height: 5px;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.subtasks-progress-fill {
  height: 100%;
  background-color: var(--accent-success);
  transition: width 0.25s ease;
}

.btn-toggle-subtasks {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.72rem;
  cursor: pointer;
}

.btn-toggle-subtasks:hover {
  color: var(--text-primary);
}

.subtasks-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
}

.subtasks-list.hidden {
  display: none;
}

.subtask-item {
  display: flex;
  align-items: center;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  background-color: rgba(0, 0, 0, 0.15);
}

.subtask-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--text-secondary);
  width: 100%;
}

.subtask-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--text-muted);
  border-radius: 4px;
  background-color: transparent;
  position: relative;
  cursor: pointer;
}

.subtask-checkbox:checked {
  background-color: var(--accent-success);
  border-color: var(--accent-success);
}

.subtask-checkbox:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 10px;
  font-weight: 700;
}

.subtask-item.sub-completed .subtask-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.quick-add-subtask-bar {
  margin-top: 10px;
}

.quick-subtask-input {
  width: 100%;
  padding: 6px 10px;
  background-color: rgba(0, 0, 0, 0.2);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.quick-subtask-input:focus {
  outline: none;
  border-color: var(--border-focus);
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

/* Timer Button */
.btn-timer {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border-radius: 16px;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-timer:hover {
  background-color: rgba(59, 130, 246, 0.2);
  color: #93C5FD;
}

.btn-timer.active {
  background-color: rgba(59, 130, 246, 0.3);
  color: #60A5FA;
  border-color: #3B82F6;
  animation: pulse-border 2s infinite;
}

@keyframes pulse-border {
  0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
  70% { box-shadow: 0 0 0 6px rgba(59, 130, 246, 0); }
  100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

/* ==========================================
   BUTTONS & COMMON CONTROLS
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  min-height: 40px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.15s ease;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--accent-primary-hover);
}

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

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

.btn-danger {
  background-color: rgba(239, 68, 68, 0.18);
  color: #F87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

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

.btn-icon-subtle {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  transition: color 0.15s ease, background 0.15s ease;
}

.btn-icon-subtle:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.08);
}

.fab-btn {
  display: none; /* Desktop default, shown on mobile */
  position: fixed;
  right: calc(var(--safe-right) + 20px);
  bottom: calc(var(--safe-bottom) + 24px);
  width: 56px;
  height: 56px;
  border-radius: 28px;
  background: linear-gradient(135deg, #3B82F6, #8B5CF6);
  color: white;
  border: none;
  font-size: 1.7rem;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
  z-index: 40;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  max-width: 400px;
  margin: 0 auto;
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.empty-state h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* ==========================================
   MODALS
   ========================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 540px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  transform: translateY(12px) scale(0.97);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.modal-backdrop.open .modal-card {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  background-color: rgba(15, 23, 42, 0.5);
}

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 9px 12px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: border-color 0.15s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
}

.form-textarea {
  resize: vertical;
  min-height: 70px;
}

/* Subtask builder inside modal */
.subtask-builder-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: calc(var(--safe-bottom) + 20px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 200;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  color: var(--text-primary);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-lg);
  animation: slide-up 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  min-width: 280px;
  max-width: 90vw;
}

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

.toast.fade-out {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  margin-left: auto;
}

@keyframes slide-up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* PWA Install Banner */
.pwa-banner {
  background: linear-gradient(135deg, #1E3A8A, #3B82F6);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: white;
  font-size: 0.85rem;
  z-index: 30;
}

.pwa-banner.hidden {
  display: none;
}

.spinner {
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hidden {
  display: none !important;
}

/* ==========================================
   RESPONSIVENESS (iPadOS & Android Mobile)
   ========================================== */
@media (max-width: 1024px) {
  /* iPad Portrait & Tablets */
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 45;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
  }

  .sidebar-overlay.open {
    opacity: 1;
    visibility: visible;
  }

  .toggle-sidebar-btn {
    display: inline-flex;
  }
}

@media (max-width: 640px) {
  /* Mobile Android & iPhone */
  .top-bar {
    padding-left: 12px;
    padding-right: 12px;
  }

  .control-bar {
    padding: 10px 14px;
    gap: 10px;
  }

  .filter-tabs {
    width: 100%;
    overflow-x: auto;
  }

  .search-box {
    max-width: 100%;
  }

  .tasks-scroll-area {
    padding: 12px 14px calc(var(--safe-bottom) + 90px) 14px;
  }

  .fab-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .desktop-only-btn {
    display: none;
  }

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