/* ==========================================================================
   Component Styles - BEM Methodology
   ========================================================================== */

/* ==========================================================================
   Button Component
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--gradient-warm);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-sm);
}

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

.btn--secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-bg-elevated);
}

.btn--secondary:hover {
  background-color: var(--color-bg-elevated);
  border-color: var(--color-accent-primary);
}

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

.btn--ghost:hover {
  color: var(--color-text-primary);
  background-color: rgba(255, 255, 255, 0.05);
}

.btn--large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
}

.btn--small {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
}

.btn--full {
  width: 100%;
}

.btn__loader {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--gradient-warm);
  color: var(--color-text-primary);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
}

/* ==========================================================================
   Card Component
   ========================================================================== */

.card {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.card__header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-bg-tertiary);
}

.card__body {
  padding: var(--spacing-lg);
}

.card__footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-bg-tertiary);
}

/* ==========================================================================
   Form Components
   ========================================================================== */

.form-field {
  margin-bottom: var(--spacing-lg);
}

.form-field__label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-field__input {
  width: 100%;
  padding: var(--spacing-md);
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-bg-elevated);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-field__input::placeholder {
  color: var(--color-text-muted);
}

.form-field__input:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(212, 100, 124, 0.2);
}

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

.form-field__hint {
  margin-top: var(--spacing-xs);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.form-field__error {
  margin-top: var(--spacing-xs);
  font-size: 0.85rem;
  color: var(--color-error);
}

/* ==========================================================================
   Container
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container--wide {
  max-width: var(--max-width-wide);
}

.container--narrow {
  max-width: 500px;
}

/* ==========================================================================
   Selection Cards
   
   Reusable selection component for radio/checkbox inputs styled as cards.
   Used for: reader preferences, story type wizard, story settings.
   
   Usage:
   <div class="selection-group">
     <label class="selection-card">
       <input type="radio" name="..." class="selection-card__input">
       <span class="selection-card__content">
         <span class="selection-card__label">Option Name</span>
         <span class="selection-card__description">Optional description</span>
       </span>
       <span class="selection-card__check"></span>
     </label>
   </div>
   
   Modifiers:
   - .selection-group--horizontal: Horizontal layout for short options
   - .selection-card--compact: Smaller padding for inline selections
   ========================================================================== */

.selection-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.selection-group--horizontal {
  flex-direction: row;
  flex-wrap: wrap;
}

.selection-card {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-bg-tertiary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.selection-card:hover {
  background-color: var(--color-bg-elevated);
}

.selection-card__input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.selection-card:has(.selection-card__input:checked) {
  border-color: var(--color-accent-primary);
  background-color: rgba(212, 100, 124, 0.1);
}

.selection-card:has(.selection-card__input:focus-visible) {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

.selection-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  flex: 1;
}

.selection-card__label {
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.selection-card:has(.selection-card__input:checked) .selection-card__label {
  color: var(--color-text-primary);
}

.selection-card__description {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.selection-card__check {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

/* Radio buttons get circular check */
.selection-card:has(input[type="radio"]) .selection-card__check {
  border-radius: var(--radius-full);
}

.selection-card:has(.selection-card__input:checked) .selection-card__check {
  background-color: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
}

.selection-card:has(.selection-card__input:checked) .selection-card__check::after {
  content: "✓";
  color: white;
  font-size: 0.75rem;
}

/* Compact variant for inline/horizontal selections */
.selection-card--compact {
  padding: var(--spacing-sm) var(--spacing-md);
}

.selection-card--compact .selection-card__check {
  width: 18px;
  height: 18px;
}

.selection-card--compact .selection-card__check::after {
  font-size: 0.65rem;
}

/* Selection card with inline action (e.g., dropdown) */
.selection-card--with-action {
  align-items: center;
}

.selection-card__action {
  flex-shrink: 0;
}

/* ==========================================================================
   Logo Component - Animated SVG
   ========================================================================== */

.logo {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo--large {
  width: 80px;
  height: 80px;
}

.logo--hero {
  width: 120px;
  height: 120px;
}

/* Outer ring - slow rotation */
.logo__ring-group {
  transform-origin: center;
  animation: logo-rotate 12s linear infinite;
}

@keyframes logo-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Middle layer - counter rotation, slower */
.logo__mid-group {
  transform-origin: center;
  animation: logo-rotate-reverse 18s linear infinite;
}

@keyframes logo-rotate-reverse {
  from { transform: rotate(0deg); }
  to { transform: rotate(-360deg); }
}

/* Core - gentle float */
.logo__core-group {
  transform-origin: center;
  animation: logo-float 4s ease-in-out infinite;
}

.logo__core {
  filter: drop-shadow(0 0 6px rgba(212, 100, 124, 0.4));
}

@keyframes logo-float {
  0%, 100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-1px) scale(1.02);
  }
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  .logo__ring-group,
  .logo__mid-group,
  .logo__core-group {
    animation: none;
  }
}