/* ============================================
   iOS-Style UI Components
   ============================================ */

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 8px 16px; /* explicitly matching btn-save */
  font-family: var(--font-family);
  font-size: 13px; /* explicit 13px */
  font-weight: 500;
  line-height: 1;
  line-height: 1;
  height: 36px; /* explicit height as requested "vrátane výšky" */
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: #3b82f6;
  color: white;
  padding: 8px 16px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 500;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

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

.btn-secondary:hover:not(:disabled) {
  background: #D1D1D6;
}

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

.btn-success:hover:not(:disabled) {
  background: #248A3D; /* Darker green */
  box-shadow: var(--shadow-md);
}

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

.btn-warning:hover:not(:disabled) {
  background: #DB8000; /* Darker orange */
  box-shadow: var(--shadow-md);
}

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

.btn-error:hover:not(:disabled) {
  background: #D70015; /* Darker red */
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover:not(:disabled) {
  background: #D1D1D6;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background: var(--color-primary-light);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}

.btn-icon {
  padding: var(--space-3);
  border-radius: var(--radius-sm);
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-lg);
}

/* === Inputs === */
.input-group {
  display: flex;
  flex-direction: column;
}


label,
.input-label {
  display: block;
  font-size: 12px;
  margin-bottom: 4px;
  color: #64748b;
  font-weight: 500;
}

.input {
  width: 100%;
  padding: 8px 12px;
  font-family: var(--font-family);
  font-size: 13px;
  color: var(--color-text);
  background: var(--color-surface-solid);
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  box-sizing: border-box;
  transition: border-color 0.2s;
}

.input::placeholder {
  color: var(--color-text-tertiary);
}

.input:hover:not(:disabled) {
  border-color: var(--color-text-tertiary);
}

.input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: none;
}

.input:disabled {
  background: var(--color-bg-secondary);
  cursor: not-allowed;
  opacity: 0.7;
}

.input-error {
  border-color: var(--color-error);
}

.input-error:focus {
  box-shadow: 0 0 0 3px rgba(255, 59, 48, 0.15);
}

.input-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.input-error-text {
  font-size: var(--font-size-xs);
  color: var(--color-error);
}

/* Search Input */
.search-input {
  position: relative;
}

.search-input .input {
  padding-left: 44px;
  padding-right: 60px;
}

.search-input .search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.search-input .search-shortcut {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-xs);
}

/* Textarea */
.textarea {
  min-height: 100px;
  resize: vertical;
}

/* Select */
.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2386868B' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

/* === Cards === */
.card {
  background: var(--color-surface-solid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.card-body {
  padding: var(--space-5);
}

.card-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

/* Stat Card */
.stat-card {
  padding: var(--space-5);
}

.stat-card .stat-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
}

.stat-card .stat-value {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.stat-card .stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.stat-card .stat-change {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  margin-top: var(--space-2);
}

.stat-card .stat-change.positive { color: var(--color-success); }
.stat-card .stat-change.negative { color: var(--color-error); }

/* Task Card (for Kanban) */
.task-card {
  padding: var(--space-4);
  cursor: grab;
}

.task-card:active {
  cursor: grabbing;
}

.task-card .task-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-3);
}

.task-card .task-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.task-card .drag-handle {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  color: var(--color-text-tertiary);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.task-card:hover .drag-handle {
  opacity: 1;
}

/* Empty State Card */
.empty-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.empty-card .empty-icon {
  width: 64px;
  height: 64px;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.empty-card .empty-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

.empty-card .empty-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  max-width: 300px;
}

/* === Badges === */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-xs);
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-success {
  background: rgba(52, 199, 89, 0.15);
  color: var(--color-success);
}

.badge-warning {
  background: rgba(255, 149, 0, 0.15);
  color: var(--color-warning);
}

.badge-error {
  background: rgba(255, 59, 48, 0.15);
  color: var(--color-error);
}

.badge-neutral {
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
}

/* Priority Badges */
.badge-p0 { background: rgba(255, 59, 48, 0.15); color: var(--color-p0); }
.badge-p1 { background: rgba(255, 149, 0, 0.15); color: var(--color-p1); }
.badge-p2 { background: rgba(0, 122, 255, 0.15); color: var(--color-p2); }
.badge-p3 { background: var(--color-bg-secondary); color: var(--color-p3); }

/* Status Badges */
.badge-todo { background: rgba(134, 134, 139, 0.15); color: var(--color-status-todo); }
.badge-progress { background: rgba(0, 122, 255, 0.15); color: var(--color-status-progress); }
.badge-review { background: rgba(255, 149, 0, 0.15); color: var(--color-status-review); }
.badge-done { background: rgba(52, 199, 89, 0.15); color: var(--color-status-done); }

/* Notification Badge */
.badge-notification {
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-size: 11px;
  font-weight: var(--font-weight-semibold);
  background: var(--color-error);
  color: white;
  border-radius: var(--radius-full);
}

/* === Avatars === */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary) 0%, #5856D6 100%);
  color: white;
  font-weight: var(--font-weight-semibold);
  overflow: hidden;
  flex-shrink: 0;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-xs { width: 24px; height: 24px; font-size: 10px; }
.avatar-sm { width: 32px; height: 32px; font-size: 12px; }
.avatar-md { width: 40px; height: 40px; font-size: 14px; }
.avatar-lg { width: 56px; height: 56px; font-size: 20px; }
.avatar-xl { width: 80px; height: 80px; font-size: 28px; }

.avatar-group {
  display: flex;
}

.avatar-group .avatar {
  border: 2px solid white;
  margin-left: -8px;
}

.avatar-group .avatar:first-child {
  margin-left: 0;
}

.avatar-group .avatar-more {
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
}

/* === Modals === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  animation: fadeIn var(--transition-fast);
  padding: var(--space-4);
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  animation: scaleIn var(--transition-base);
  background: var(--color-surface-solid);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-xl);
}

.modal-lg { max-width: 640px; }
.modal-xl { max-width: 800px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.modal-close {
  padding: var(--space-2);
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

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

.modal-body {
  padding: var(--space-5);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

/* === Dropdowns === */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 200px;
  background: var(--color-surface-solid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  z-index: var(--z-dropdown);
  animation: slideDown var(--transition-fast);
  overflow: hidden;
}

.dropdown-menu.hidden {
  display: none;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--color-bg);
}

.dropdown-item.danger {
  color: var(--color-error);
}

.dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-2) 0;
}

/* === Toasts === */
.toast-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-width: 320px;
  max-width: 420px;
  padding: var(--space-4);
  background: var(--color-surface-solid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  animation: slideDown var(--transition-base);
}

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-1);
}

.toast-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.toast-close {
  padding: var(--space-1);
  background: transparent;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
}

.toast-success .toast-icon { color: var(--color-success); }
.toast-error .toast-icon { color: var(--color-error); }
.toast-info .toast-icon { color: var(--color-info); }
.toast-warning .toast-icon { color: var(--color-warning); }

/* === Tables === */
.table-container {
  overflow-x: auto;
  background: var(--color-surface-solid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.table th {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--color-bg);
}

.table tbody tr {
  transition: background var(--transition-fast);
}

.table tbody tr:hover {
  background: var(--color-bg);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* === Tabs === */
.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--color-border);
}

.tab {
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
}

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

.tab.active {
  color: var(--color-primary);
}

.tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px 2px 0 0;
}

/* === Modal Tabs (Synced with Gantt) === */
.modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  padding: 0 16px;
  background: none;
  margin-top: 0;
}

.modal-tab {
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

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

.modal-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* === Context Menu Button === */
.context-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: transparent;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.context-btn:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}

/* === Loading Spinner === */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

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

/* === Tooltip === */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-xs);
  color: white;
  background: var(--color-text);
  border-radius: var(--radius-xs);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
}

/* === Utilities === */
.hidden {
  display: none !important;
}

/* === Stat Chips (for quick filters) === */
.stat-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface-solid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1.5px solid var(--color-border);
  transition: all var(--transition-fast);
  min-width: 80px;
}

.stat-chip:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.stat-chip.active {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.stat-chip.warning {
  border-color: var(--color-warning);
  background: rgba(255, 149, 0, 0.08);
}

.stat-chip.warning .stat-chip-value {
  color: var(--color-warning);
}

.stat-chip.success {
  border-color: var(--color-success);
  background: rgba(52, 199, 89, 0.08);
}

.stat-chip.success .stat-chip-value {
  color: var(--color-success);
}

.stat-chip-value {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

.stat-chip-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* === Button Chips (for date filters) === */
.btn-chip {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-chip:hover {
  background: var(--color-border);
  color: var(--color-text);
}

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

/* === Context Menu === */
.context-menu {
  position: fixed;
  min-width: 180px;
  background: var(--color-surface-solid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  z-index: var(--z-dropdown);
  animation: scaleIn var(--transition-fast);
  overflow: hidden;
  padding: var(--space-2) 0;
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.context-menu-item:hover {
  background: var(--color-bg);
}

.context-menu-item.danger {
  color: var(--color-error);
}

.context-menu-item.danger:hover {
  background: rgba(255, 59, 48, 0.1);
}

.context-menu-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-2) 0;
}

/* === Report Cards === */
.report-card {
  background: var(--color-surface-solid);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  cursor: pointer;
}

.report-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.report-card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px; 
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  box-shadow: var(--shadow-md);
}
}