/**
 * Components - Trantor Platform Design System
 *
 * Shared, reusable component styles that provide a consistent
 * foundation for UI elements across the application.
 *
 * All components use design tokens from design-tokens.css
 *
 * Dependencies: design-tokens.css (must be loaded first)
 */

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

/**
 * Base Button
 * Usage: <button class="btn">Button</button>
 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--btn-padding-y) var(--btn-padding-x);
  font-size: var(--btn-font-size);
  font-weight: var(--btn-font-weight);
  font-family: var(--font-primary);
  line-height: var(--leading-normal);
  border-radius: var(--btn-border-radius);
  border: 1px solid transparent;
  transition: var(--btn-transition);
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
  vertical-align: middle;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 var(--focus-ring-width) var(--focus-ring-color);
}

.btn:disabled,
.btn.disabled {
  opacity: var(--disabled-opacity);
  cursor: var(--disabled-cursor);
  pointer-events: none;
}

/**
 * Primary Button
 * Usage: <button class="btn btn-primary">Primary</button>
 */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--text-on-primary);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--text-on-primary);
}

.btn-primary:active {
  background-color: var(--color-primary-dark);
  transform: translateY(1px);
}

/**
 * Secondary Button
 * Usage: <button class="btn btn-secondary">Secondary</button>
 */
.btn-secondary {
  background-color: var(--gray-600);
  color: var(--text-on-primary);
  border-color: var(--gray-600);
}

.btn-secondary:hover {
  background-color: var(--gray-700);
  border-color: var(--gray-700);
  color: var(--text-on-primary);
}

.btn-secondary:active {
  background-color: var(--gray-800);
  transform: translateY(1px);
}

/**
 * Outline Button
 * Usage: <button class="btn btn-outline">Outline</button>
 */
.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--text-on-primary);
  border-color: var(--color-primary);
}

.btn-outline:active {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(1px);
}

/**
 * Danger/Error Button
 * Usage: <button class="btn btn-danger">Delete</button>
 */
.btn-danger {
  background-color: var(--color-error);
  color: var(--text-on-primary);
  border-color: var(--color-error);
}

.btn-danger:hover {
  background-color: var(--color-error-dark);
  border-color: var(--color-error-dark);
  color: var(--text-on-primary);
}

.btn-danger:active {
  background-color: var(--color-error-dark);
  transform: translateY(1px);
}

/**
 * Success Button
 * Usage: <button class="btn btn-success">Save</button>
 */
.btn-success {
  background-color: var(--color-success);
  color: var(--text-on-primary);
  border-color: var(--color-success);
}

.btn-success:hover {
  background-color: var(--color-success-dark);
  border-color: var(--color-success-dark);
  color: var(--text-on-primary);
}

.btn-success:active {
  background-color: var(--color-success-dark);
  transform: translateY(1px);
}

/**
 * Button Sizes
 */
.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
}

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

/**
 * Block Button (full width)
 */
.btn-block {
  display: flex;
  width: 100%;
}

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

/**
 * Base Card
 * Usage: <div class="card">Card content</div>
 */
.card {
  background-color: var(--card-bg);
  border: var(--card-border-width) solid var(--card-border-color);
  border-radius: var(--card-border-radius);
  padding: var(--card-padding);
  box-shadow: var(--card-shadow);
  transition: var(--transition-base);
}

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

/**
 * Card Header
 */
.card-header {
  padding: var(--space-4) var(--space-6);
  margin: calc(var(--card-padding) * -1) calc(var(--card-padding) * -1) var(--space-4);
  border-bottom: 1px solid var(--border-light);
  font-weight: var(--font-semibold);
  font-size: var(--text-lg);
}

/**
 * Card Body
 */
.card-body {
  padding: var(--space-4) 0;
}

/**
 * Card Footer
 */
.card-footer {
  padding: var(--space-4) var(--space-6);
  margin: var(--space-4) calc(var(--card-padding) * -1) calc(var(--card-padding) * -1);
  border-top: 1px solid var(--border-light);
  background-color: var(--bg-base);
  border-bottom-left-radius: var(--card-border-radius);
  border-bottom-right-radius: var(--card-border-radius);
}

/* ========================================
   FORMS
   ======================================== */

/**
 * Form Group (wrapper for label + input)
 */
.form-group {
  margin-bottom: var(--space-4);
}

/**
 * Form Label
 * Usage: <label class="form-label">Label</label>
 */
.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
}

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

/**
 * Form Input
 * Usage: <input type="text" class="form-input">
 */
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  font-size: var(--input-font-size);
  font-family: var(--font-primary);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-surface);
  border: var(--input-border-width) solid var(--input-border-color);
  border-radius: var(--input-border-radius);
  transition: var(--transition-base);
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

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

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  opacity: var(--disabled-opacity);
  cursor: var(--disabled-cursor);
  background-color: var(--gray-100);
}

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

/**
 * Textarea
 */
.form-textarea {
  resize: vertical;
  min-height: 6rem;
}

/**
 * Form Error/Help Text
 */
.form-error {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-error);
}

.form-help {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/**
 * Input with Icon
 */
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: var(--space-3);
  color: var(--text-tertiary);
  pointer-events: none;
}

.form-input.has-icon {
  padding-left: var(--space-10);
}

/* ========================================
   ALERTS
   ======================================== */

/**
 * Base Alert
 * Usage: <div class="alert alert-info">Info message</div>
 */
.alert {
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
}

.alert-info {
  background-color: var(--color-info-light);
  border-color: var(--color-info);
  color: var(--color-info-dark);
}

.alert-success {
  background-color: var(--color-success-light);
  border-color: var(--color-success);
  color: var(--color-success-dark);
}

.alert-warning {
  background-color: var(--color-warning-light);
  border-color: var(--color-warning);
  color: var(--color-warning-dark);
}

.alert-error,
.alert-danger {
  background-color: var(--color-error-light);
  border-color: var(--color-error);
  color: var(--color-error-dark);
}

.alert-dismissible {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.alert-close {
  background: none;
  border: none;
  font-size: var(--text-lg);
  color: currentColor;
  cursor: pointer;
  padding: 0;
  margin-left: var(--space-4);
  opacity: 0.7;
  transition: var(--transition-fast);
}

.alert-close:hover {
  opacity: 1;
}

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

/**
 * Modal Backdrop
 */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--modal-backdrop-bg);
  z-index: var(--z-modal-backdrop);
  animation: fadeIn var(--transition-base);
}

/**
 * Modal Container
 */
.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: var(--z-modal);
  background-color: var(--modal-content-bg);
  border-radius: var(--modal-border-radius);
  box-shadow: var(--modal-shadow);
  max-width: 90%;
  max-height: 90vh;
  overflow: auto;
  animation: slideIn var(--transition-base);
}

.modal-sm {
  width: 100%;
  max-width: 400px;
}

.modal-md {
  width: 100%;
  max-width: 600px;
}

.modal-lg {
  width: 100%;
  max-width: 900px;
}

.modal-xl {
  width: 100%;
  max-width: 1200px;
}

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

.modal-title {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

/**
 * Modal Body
 */
.modal-body {
  padding: var(--space-6);
}

/**
 * Modal Footer
 */
.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-light);
}

/* ========================================
   BADGES
   ======================================== */

/**
 * Badge
 * Usage: <span class="badge badge-primary">New</span>
 */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  line-height: var(--leading-none);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

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

.badge-secondary {
  background-color: var(--gray-500);
  color: var(--text-on-primary);
}

.badge-success {
  background-color: var(--color-success);
  color: var(--text-on-primary);
}

.badge-warning {
  background-color: var(--color-warning);
  color: var(--gray-900);
}

.badge-error,
.badge-danger {
  background-color: var(--color-error);
  color: var(--text-on-primary);
}

.badge-info {
  background-color: var(--color-info);
  color: var(--text-on-primary);
}

/* ========================================
   TOOLTIPS
   ======================================== */

/**
 * Tooltip (requires JavaScript for positioning)
 */
.tooltip {
  position: absolute;
  z-index: var(--z-tooltip);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-on-primary);
  background-color: var(--gray-900);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.tooltip.show {
  opacity: 1;
}

/* ========================================
   SPINNERS / LOADERS
   ======================================== */

/**
 * Spinner
 * Usage: <div class="spinner"></div>
 */
.spinner {
  width: 2rem;
  height: 2rem;
  border: 3px solid var(--gray-200);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 1rem;
  height: 1rem;
  border-width: 2px;
}

.spinner-lg {
  width: 3rem;
  height: 3rem;
  border-width: 4px;
}

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

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

/**
 * Divider
 */
.divider {
  height: 1px;
  background-color: var(--border-light);
  margin: var(--space-4) 0;
}

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

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translate(-50%, -48%);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

/**
 * Screen Reader Only (for accessibility)
 */
.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;
}