/* ═══════════════════════════════════════════════════════════════
   VK CREATIVES — COMPONENT STYLES
   Reusable UI components: buttons, cards, forms, modals, badges
   ═══════════════════════════════════════════════════════════════ */

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 20px;
  font-size: var(--font-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  text-decoration: none;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::after { opacity: 1; }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--vk-navy), var(--vk-navy-light));
  color: #FFFFFF;
  box-shadow: var(--shadow-md), var(--shadow-glow-navy);
}

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

.btn-success {
  background: linear-gradient(135deg, var(--vk-green-dark), var(--vk-green));
  color: #FFFFFF;
  box-shadow: var(--shadow-md), var(--shadow-glow-green);
}

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

.btn-danger {
  background: linear-gradient(135deg, var(--vk-coral-dark), var(--vk-coral));
  color: #FFFFFF;
  box-shadow: var(--shadow-md), var(--shadow-glow-coral);
}

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

.btn-warning {
  background: linear-gradient(135deg, var(--vk-amber-dark), var(--vk-amber));
  color: #FFFFFF;
  box-shadow: var(--shadow-md);
}

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

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

.btn-ghost:hover {
  background: var(--bg-card-hover);
  border-color: var(--text-tertiary);
}

.btn-outline {
  background: transparent;
  color: var(--vk-navy);
  border: 2px solid var(--vk-navy);
}

.btn-outline:hover {
  background: var(--vk-navy);
  color: #FFFFFF;
}

.btn-sm { padding: 6px 14px; font-size: var(--font-sm); border-radius: var(--radius-sm); }
.btn-lg { padding: 14px 28px; font-size: var(--font-lg); border-radius: var(--radius-lg); }
.btn-xl { padding: 18px 36px; font-size: var(--font-xl); border-radius: var(--radius-lg); }
.btn-icon { padding: 10px; }
.btn-icon.btn-sm { padding: 6px; }
.btn-block { width: 100%; }

.btn:disabled, .btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Ripple */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.35);
  transform: scale(0);
  animation: ripple-anim 600ms linear;
  pointer-events: none;
}

@keyframes ripple-anim {
  to { transform: scale(4); opacity: 0; }
}

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  overflow: hidden;
}

.card:hover { box-shadow: var(--shadow-md); }

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

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

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

/* Stat Card */
.stat-card {
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.stat-card.green::before { background: var(--vk-green); }
.stat-card.coral::before { background: var(--vk-coral); }
.stat-card.navy::before { background: var(--vk-navy); }
.stat-card.amber::before { background: var(--vk-amber); }
.stat-card.purple::before { background: var(--vk-purple); }

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

.stat-card .stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.stat-card.green .stat-icon { background: var(--color-success-bg); }
.stat-card.coral .stat-icon { background: var(--color-danger-bg); }
.stat-card.navy .stat-icon { background: var(--color-info-bg); }
.stat-card.amber .stat-icon { background: var(--color-warning-bg); }

.stat-card .stat-value {
  font-size: var(--font-3xl);
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--space-xs);
}

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

/* ── Forms ───────────────────────────────────────────────────── */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: var(--font-base);
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  -webkit-appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--vk-navy);
  background: var(--bg-input-focus);
  box-shadow: 0 0 0 3px rgba(43, 45, 123, 0.12);
}

.form-input::placeholder { color: var(--text-tertiary); }
.form-textarea { min-height: 100px; resize: vertical; }
.form-select { cursor: pointer; }

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

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

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

@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

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

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

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: all var(--transition-spring);
  box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--vk-green);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(22px);
}

/* ── Badges ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: var(--font-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

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

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

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

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

.badge-purple {
  background: rgba(91, 45, 142, 0.1);
  color: var(--vk-purple);
}

/* Dot badge */
.badge-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

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

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

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-spring);
}

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

.modal-header {
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 { margin: 0; }

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--bg-input);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

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

.modal-body { padding: 0 var(--space-lg) var(--space-lg); }

.modal-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

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

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-width: 300px;
  max-width: 420px;
  pointer-events: auto;
  animation: toast-in 0.4s var(--transition-spring);
  position: relative;
  overflow: hidden;
}

.toast::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
}

.toast.success::before { background: var(--color-success); }
.toast.warning::before { background: var(--color-warning); }
.toast.error::before { background: var(--color-danger); }
.toast.info::before { background: var(--color-info); }

.toast-icon { font-size: 1.3rem; flex-shrink: 0; }
.toast-message { font-size: var(--font-sm); font-weight: 500; flex: 1; }

.toast-close {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 4px;
  font-size: 1rem;
}

.toast.removing {
  animation: toast-out 0.3s ease forwards;
}

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

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

@media (max-width: 480px) {
  .toast-container {
    top: var(--space-md);
    left: var(--space-md);
    right: var(--space-md);
  }
  .toast { min-width: unset; }
}

/* ── Avatar ──────────────────────────────────────────────────── */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-color);
  flex-shrink: 0;
}

.avatar-sm { width: 32px; height: 32px; }
.avatar-lg { width: 56px; height: 56px; }
.avatar-xl { width: 72px; height: 72px; }

.avatar-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--vk-navy), var(--vk-purple));
  color: #FFFFFF;
  font-weight: 700;
  font-size: var(--font-base);
}

.avatar-placeholder.avatar-lg { font-size: var(--font-xl); }
.avatar-placeholder.avatar-xl { font-size: var(--font-2xl); }

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

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

.table th {
  background: var(--bg-card-hover);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: var(--font-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color-light);
  color: var(--text-primary);
}

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

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

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

/* ── Empty State ─────────────────────────────────────────────── */
.empty-state {
  padding: var(--space-3xl) var(--space-lg);
  text-align: center;
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.empty-state h4 {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.empty-state p {
  font-size: var(--font-sm);
  color: var(--text-tertiary);
  max-width: 300px;
  margin: 0 auto;
}

/* ── Loading Spinner ─────────────────────────────────────────── */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-color);
  border-top-color: var(--vk-navy);
  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); }
}

.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-body);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  z-index: 9999;
  transition: opacity var(--transition-slow);
}

.loading-screen.fade-out {
  opacity: 0;
  pointer-events: none;
}

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

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 180px;
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  padding: var(--space-xs);
}

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

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 12px;
  font-size: var(--font-sm);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

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

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

/* ── Tabs ────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 3px;
  overflow-x: auto;
}

.tab {
  padding: 8px 16px;
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

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

.tab.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

/* ── Notification Dot ────────────────────────────────────────── */
.notification-dot {
  position: relative;
}

.notification-dot::after {
  content: '';
  position: absolute;
  top: -2px;
  right: -2px;
  width: 10px;
  height: 10px;
  background: var(--color-danger);
  border-radius: 50%;
  border: 2px solid var(--bg-card);
}

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

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

.skeleton-text {
  height: 14px;
  margin-bottom: var(--space-sm);
}

.skeleton-title {
  height: 24px;
  width: 60%;
  margin-bottom: var(--space-md);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

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

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--bg-tooltip);
  color: #FFFFFF;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--font-xs);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: all var(--transition-fast);
  z-index: var(--z-tooltip);
}

[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

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

.progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  background: linear-gradient(90deg, var(--vk-green), var(--vk-green-light));
}

/* ── Chip / Tag ──────────────────────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--bg-input);
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 500;
  color: var(--text-secondary);
  cursor: default;
}

.chip-remove {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--text-tertiary);
  color: var(--bg-card);
  cursor: pointer;
  font-size: 10px;
}

.chip-remove:hover { background: var(--color-danger); }