/* ═══════════════════════════════════════════════════════════
   FinanzApp — Components
   Reusable UI components: buttons, cards, forms, modals, etc.
   ═══════════════════════════════════════════════════════════ */

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  min-height: 40px;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::after {
  opacity: 1;
}

.btn:active {
  transform: scale(0.97);
}

.btn i { font-size: 18px; }

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-on-primary);
  box-shadow: var(--shadow-md), 0 0 0 0 var(--primary-glow);
}

.btn-primary:hover {
  box-shadow: var(--shadow-lg), 0 0 20px var(--primary-glow);
  transform: translateY(-1px);
}

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

.btn-accent:hover {
  box-shadow: var(--shadow-lg), 0 0 20px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--gradient-danger);
  color: var(--text-on-primary);
  box-shadow: var(--shadow-md);
}

.btn-danger:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-default);
}

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

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

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

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  min-height: 32px;
}

.btn-lg {
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-md);
  min-height: 48px;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
  min-height: 32px;
}

.btn:disabled, .btn.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.btn-block { width: 100%; }

/* ─── Cards ─── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

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

.card-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.card-gradient {
  background: var(--gradient-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.card-title {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--space-1);
}

.card-body {
  flex: 1;
}

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

/* Stat Cards */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--_accent-color, var(--primary));
  opacity: 0.6;
}

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

.stat-card-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  background: var(--_accent-surface, var(--primary-surface));
  color: var(--_accent-color, var(--primary));
}

.stat-card-value {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

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

.stat-card-trend {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}

.stat-card-trend.up {
  color: var(--accent);
  background: var(--accent-surface);
}

.stat-card-trend.down {
  color: var(--danger);
  background: var(--danger-surface);
}

/* ─── Forms ─── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

.form-label.required::after {
  content: ' *';
  color: var(--danger);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
  min-height: 42px;
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--border-hover);
}

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

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

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-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='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-input-icon {
  position: relative;
}

.form-input-icon .form-input {
  padding-left: 42px;
}

.form-input-icon i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  font-size: 18px;
  pointer-events: none;
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

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

.form-input.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(244, 63, 94, 0.2);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
}

/* Toggle / Switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--bg-surface);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: var(--text-primary);
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.toggle input:checked + .toggle-slider {
  background: var(--primary);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

/* ─── Badges ─── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

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

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

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

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

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

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

/* Dot */
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.badge-dot.active { background: var(--accent); }
.badge-dot.inactive { background: var(--text-tertiary); }
.badge-dot.warning { background: var(--warning); }
.badge-dot.danger { background: var(--danger); }

/* ─── Tables ─── */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
}

.table {
  width: 100%;
  font-size: var(--text-sm);
}

.table thead {
  background: var(--bg-surface);
}

.table th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  border-bottom: 1px solid var(--border-default);
}

.table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

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

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

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

.table-sortable th {
  cursor: pointer;
  user-select: none;
}

.table-sortable th:hover {
  color: var(--text-primary);
}

/* ─── Modal ─── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: var(--space-4);
}

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

.modal {
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-subtle);
}

/* Large Modal */
.modal-lg { max-width: 720px; }

/* ─── Tabs ─── */
.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--border-default);
  overflow-x: auto;
}

.tab {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
}

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

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

/* Pill tabs */
.tabs-pills {
  display: flex;
  gap: var(--space-2);
  background: var(--bg-surface);
  padding: var(--space-1);
  border-radius: var(--radius-lg);
  border: none;
}

.tab-pill {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

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

.tab-pill.active {
  background: var(--primary);
  color: var(--text-on-primary);
  box-shadow: var(--shadow-sm);
}

/* ─── Toast / Notification ─── */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  min-width: 320px;
  max-width: 440px;
  pointer-events: all;
  animation: toastSlideIn var(--transition-bounce) forwards;
}

.toast-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.toast-success { border-left: 3px solid var(--accent); }
.toast-error { border-left: 3px solid var(--danger); }
.toast-warning { border-left: 3px solid var(--warning); }
.toast-info { border-left: 3px solid var(--info); }

.toast-message {
  flex: 1;
  font-size: var(--text-sm);
}

.toast-dismiss {
  color: var(--text-tertiary);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.toast-dismiss:hover {
  color: var(--text-primary);
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast-exit {
  animation: toastSlideOut 300ms ease forwards;
}

@keyframes toastSlideOut {
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

/* ─── Dropdown ─── */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  min-width: 200px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  overflow: hidden;
}

.dropdown-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

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

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

.dropdown-item i {
  font-size: 18px;
  width: 20px;
  text-align: center;
}

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

/* ─── Progress Bar ─── */
.progress {
  width: 100%;
  height: 8px;
  background: var(--bg-surface);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  transition: width var(--transition-slow);
  position: relative;
}

.progress-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  animation: progressShine 2s infinite;
}

@keyframes progressShine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.progress-bar.accent { background: var(--gradient-accent); }
.progress-bar.warning { background: var(--warning); }
.progress-bar.danger { background: var(--gradient-danger); }

.progress-lg { height: 12px; }

/* ─── Avatar ─── */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--text-on-primary);
  flex-shrink: 0;
}

.avatar-sm { width: 32px; height: 32px; font-size: var(--text-xs); }
.avatar-lg { width: 56px; height: 56px; font-size: var(--text-lg); }

/* ─── Empty State ─── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-8);
  text-align: center;
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-xl);
  background: var(--bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: var(--text-tertiary);
  margin-bottom: var(--space-6);
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.empty-state-desc {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  max-width: 360px;
  margin-bottom: var(--space-6);
}

/* ─── Loading ─── */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-default);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.spinner-sm { width: 16px; height: 16px; border-width: 2px; }
.spinner-lg { width: 40px; height: 40px; border-width: 4px; }

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

.skeleton {
  background: linear-gradient(90deg, var(--bg-surface) 25%, var(--bg-hover) 50%, var(--bg-surface) 75%);
  background-size: 200% 100%;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

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

/* ─── Chip / Tag ─── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--bg-surface);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.chip:hover {
  background: var(--bg-hover);
}

.chip-color {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.chip-remove {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  cursor: pointer;
  margin-left: var(--space-1);
  font-size: 12px;
}

.chip-remove:hover {
  background: rgba(244, 63, 94, 0.3);
  color: var(--danger-light);
}

/* ─── Tooltip ─── */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-tooltip);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
}

[data-tooltip]:hover::after {
  opacity: 1;
  visibility: visible;
}

/* ─── Category Icon ─── */
.category-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.category-icon-sm {
  width: 28px;
  height: 28px;
  font-size: 14px;
}

.category-icon-lg {
  width: 48px;
  height: 48px;
  font-size: 24px;
}

/* ─── Confirmation Dialog ─── */
.confirm-dialog {
  text-align: center;
}

.confirm-dialog-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  margin: 0 auto var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.confirm-dialog-icon.danger {
  background: var(--danger-surface);
  color: var(--danger);
}

.confirm-dialog-icon.warning {
  background: var(--warning-surface);
  color: var(--warning);
}