/**
 * Component Library - 2025 SaaS UI Primitives
 * Uses design tokens from tokens.css
 */

/* ============================================
   UTILITY CLASSES
   ============================================ */

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

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

/* Primary Button - Blue brand color */
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

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

.btn-primary:active:not(:disabled) {
  background: var(--color-primary-pressed);
  border-color: var(--color-primary-pressed);
  transform: translateY(0);
}

/* Secondary Button - Subtle with border */
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-default);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

.btn-secondary:active:not(:disabled) {
  background: var(--bg-surface);
}

/* Ghost Button - No border, minimal */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
  padding: var(--space-2) var(--space-4);
}

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

/* Destructive Button - Red for dangerous actions */
.btn-destructive {
  background: var(--color-error);
  color: var(--color-white);
  border-color: var(--color-error);
}

.btn-destructive:hover:not(:disabled) {
  background: #c0392b;
  border-color: #c0392b);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn-full {
  width: 100%;
}

/* ============================================
   FORM CONTROLS
   ============================================ */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

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

.form-label-required::after {
  content: '*';
  color: var(--color-error);
  margin-left: var(--space-1);
}

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

.form-input:hover:not(:disabled),
.form-textarea:hover:not(:disabled),
.form-select:hover:not(:disabled) {
  border-color: var(--border-strong);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.form-input:disabled,
.form-textarea:disabled,
.form-select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--bg-base);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

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

.form-helper {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

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

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

.form-input-error:focus,
.form-textarea-error:focus,
.form-select-error:focus {
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.2);
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
  width: var(--space-5);
  height: var(--space-5);
  cursor: pointer;
  accent-color: var(--color-primary);
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-fast);
}

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

.card-header {
  margin-bottom: var(--space-6);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.card-body {
  margin-bottom: var(--space-6);
}

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

/* ============================================
   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: var(--font-medium);
  line-height: 1;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

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

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

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

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

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

/* ============================================
   TABLES
   ============================================ */

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
}

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

.table thead {
  background: var(--bg-surface);
  position: sticky;
  top: 0;
  z-index: 1;
}

.table th {
  padding: var(--space-4);
  text-align: left;
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-default);
}

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

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

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

/* ============================================
   MODALS
   ============================================ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(11, 15, 26, 0.8);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  z-index: var(--z-modal-backdrop);
  animation: fadeIn var(--transition-fast);
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  max-width: var(--max-width-md);
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
  animation: slideUp var(--transition-base);
  z-index: var(--z-modal);
}

.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-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: var(--text-2xl);
  line-height: 1;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

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

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
}

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

/* ============================================
   TOASTS / NOTIFICATIONS
   ============================================ */

.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);
  pointer-events: none;
}

.toast {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  min-width: 300px;
  max-width: 400px;
  box-shadow: var(--shadow-md);
  pointer-events: auto;
  animation: slideInRight var(--transition-base);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.toast-success {
  border-left: 3px solid var(--color-success);
}

.toast-error {
  border-left: 3px solid var(--color-error);
}

.toast-warning {
  border-left: 3px solid var(--color-warning);
}

.toast-info {
  border-left: 3px solid var(--color-info);
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

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

.toast-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: var(--text-lg);
  line-height: 1;
  cursor: pointer;
  padding: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

/* ============================================
   SKELETON LOADERS
   ============================================ */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-surface) 0%,
    var(--bg-surface-hover) 50%,
    var(--bg-surface) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton-heading {
  height: 1.5em;
  width: 60%;
  margin-bottom: var(--space-4);
}

.skeleton-card {
  height: 200px;
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

.skeleton-button {
  height: 40px;
  width: 120px;
  border-radius: var(--radius-lg);
}

/* ============================================
   EMPTY STATES
   ============================================ */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.empty-state-icon {
  font-size: var(--text-4xl);
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

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

.empty-state-description {
  font-size: var(--text-sm);
  color: var(--text-muted);
  max-width: 400px;
  margin-bottom: var(--space-6);
}

/* ============================================
   ERROR STATES
   ============================================ */

.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-6);
  background: var(--color-error-bg);
  border: 1px solid var(--color-error);
  border-radius: var(--radius-lg);
  text-align: center;
}

.error-state-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-error);
  margin-bottom: var(--space-2);
}

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

/* ============================================
   SPINNERS / LOADING
   ============================================ */

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.spinner-lg {
  width: 60px;
  height: 60px;
  border-width: 4px;
}

.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-12) var(--space-6);
}

.loading-text {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ============================================
   DIVIDERS
   ============================================ */

.divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-6) 0;
}

.divider-vertical {
  width: 1px;
  height: 100%;
  background: var(--border-subtle);
  margin: 0 var(--space-4);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

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

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */

@media (max-width: 768px) {
  .modal {
    max-width: 100%;
    max-height: 100vh;
    border-radius: 0;
  }

  .toast-container {
    left: var(--space-4);
    right: var(--space-4);
  }

  .toast {
    min-width: auto;
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  margin-top: auto;
  padding: var(--space-8) var(--space-6);
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
}

.footer-content {
  max-width: var(--max-width-xl);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-primary);
}

.footer-text {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

@media (max-width: 480px) {
  .footer-links {
    flex-direction: column;
    gap: var(--space-3);
  }
}