/* Header */
.app-header {
  position: sticky;
  top: var(--safe-top);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  min-height: var(--header-height);
}

.app-header .logo {
  height: 32px;
  width: auto;
  object-fit: contain;
}

.app-header .header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-header .header-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.theme-toggle {
  width: var(--touch-min);
  height: var(--touch-min);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.theme-toggle:active {
  background: var(--bg-elevated);
  color: var(--accent);
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: calc(var(--nav-height) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  min-width: var(--touch-min);
  min-height: var(--touch-min);
  color: var(--text-muted);
  transition: color var(--transition-fast);
  border-radius: var(--radius-sm);
}

.nav-item.active { color: var(--accent); }

.nav-item svg { width: 22px; height: 22px; }

.nav-item span {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* FAB */
.fab {
  position: fixed;
  bottom: calc(var(--nav-height) + var(--safe-bottom) + 16px);
  right: calc(16px + var(--safe-right));
  z-index: 150;
  width: var(--fab-size);
  height: var(--fab-size);
  border-radius: 50%;
  background: var(--accent);
  color: var(--text-on-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(74, 222, 128, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.fab:active { transform: scale(0.92); }

.fab svg { width: 24px; height: 24px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  min-height: var(--touch-min);
  transition: all var(--transition-fast);
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.8rem;
  min-height: 36px;
}

.btn-block { width: 100%; }

/* Task Card */
.task-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
  cursor: pointer;
}

.task-card:active { transform: scale(0.98); }

.task-card.completed { opacity: 0.55; }

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

.task-checkbox {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  transition: all var(--transition-fast);
}

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

.task-checkbox.checked svg { display: block; }

.task-checkbox svg {
  display: none;
  width: 14px;
  height: 14px;
  color: var(--text-on-accent);
}

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

.task-title {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 4px;
  word-break: break-word;
}

.task-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.task-meta.overdue { color: var(--priority-high); }

.priority-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.priority-dot.high { background: var(--priority-high); }
.priority-dot.medium { background: var(--priority-medium); }
.priority-dot.low { background: var(--priority-low); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 99px;
  font-size: 0.7rem;
  font-weight: 500;
}

.badge-recurring {
  background: rgba(22, 101, 52, 0.3);
  color: var(--accent);
}

.badge-category {
  background: var(--bg-elevated);
  color: var(--text-muted);
}

.badge-status {
  background: rgba(74, 222, 128, 0.15);
  color: var(--accent);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: var(--overlay-bg);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

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

.modal {
  width: 100%;
  max-width: 520px;
  max-height: 92dvh;
  background: var(--bg-card);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform var(--transition-normal);
}

.modal-overlay.open .modal { transform: translateY(0); }

@media (min-width: 640px) {
  .modal-overlay { align-items: center; }
  .modal {
    border-radius: var(--radius-lg);
    max-height: 85dvh;
    transform: translateY(20px) scale(0.95);
  }
  .modal-overlay.open .modal { transform: translateY(0) scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.modal-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

.modal-close {
  width: var(--touch-min);
  height: var(--touch-min);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
}

.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  -webkit-overflow-scrolling: touch;
}

.modal-footer {
  display: flex;
  gap: 10px;
  padding: 16px 20px;
  padding-bottom: calc(16px + var(--safe-bottom));
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* Form */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

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

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 8px 14px;
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all var(--transition-fast);
  min-height: 36px;
}

.chip.active {
  border-color: var(--accent);
  background: var(--accent-glow);
  color: var(--accent);
}

.chip.priority-high.active { border-color: var(--priority-high); background: rgba(239,68,68,0.15); color: var(--priority-high); }
.chip.priority-medium.active { border-color: var(--priority-medium); background: rgba(245,158,11,0.15); color: var(--priority-medium); }
.chip.priority-low.active { border-color: var(--priority-low); background: rgba(107,114,128,0.15); color: var(--text-muted); }

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.toggle {
  position: relative;
  width: 48px;
  height: 28px;
  background: var(--bg-elevated);
  border-radius: 99px;
  cursor: pointer;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.toggle.on { background: var(--accent); }

.toggle::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition-fast);
}

.toggle.on::after { transform: translateX(20px); }

/* Notes */
.notes-section { margin-top: 8px; }

.note-item {
  display: flex;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.note-text {
  flex: 1;
  font-size: 0.85rem;
  word-break: break-word;
}

.note-time {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 4px;
}

.note-delete {
  color: var(--text-dim);
  padding: 4px;
  flex-shrink: 0;
}

.note-input-row {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.note-input-row input { flex: 1; }

/* Toast */
.toast-container {
  position: fixed;
  top: calc(var(--safe-top) + 16px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 500;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  width: calc(100% - 32px);
  max-width: 400px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 0.85rem;
  box-shadow: var(--shadow-card);
  animation: toastIn 0.3s ease;
  pointer-events: auto;
}

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

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-elevated) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

.skeleton-card {
  height: 72px;
  margin-bottom: 10px;
  border-radius: var(--radius-md);
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
}

.empty-state svg {
  width: 64px;
  height: 64px;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.empty-state h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

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

/* Offline banner */
.offline-banner {
  position: fixed;
  top: var(--safe-top);
  left: 0;
  right: 0;
  z-index: 400;
  background: var(--warning);
  color: #000;
  text-align: center;
  padding: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  transform: translateY(-100%);
  transition: transform var(--transition-normal);
}

.offline-banner.visible { transform: translateY(0); }