/* =============================================================================
   SoulCore Billing - Card Component
   TASK-005: Card Component
   =============================================================================

   Варианты:
   - padding: none, sm, md (default), lg
   - shadow: none, sm, md (default), lg
   - glass: glassmorphism эффект
   - interactive: hover эффект для кликабельных карточек
   ============================================================================= */

/* -----------------------------------------------------------------------------
   Base Card Styles
   ----------------------------------------------------------------------------- */
.billing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-fast);
}

/* -----------------------------------------------------------------------------
   Padding Variants
   ----------------------------------------------------------------------------- */
.billing-card--padding-none {
  padding: 0;
}

.billing-card--padding-sm {
  padding: var(--space-sm);
}

.billing-card--padding-md {
  padding: var(--space-md);
}

.billing-card--padding-lg {
  padding: var(--space-lg);
}

/* -----------------------------------------------------------------------------
   Shadow Variants
   ----------------------------------------------------------------------------- */
.billing-card--shadow-none {
  box-shadow: none;
}

.billing-card--shadow-sm {
  box-shadow: var(--shadow-sm);
}

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

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

/* -----------------------------------------------------------------------------
   Glassmorphism Effect
   Uses semantic glass tokens from _semantic.css
   ----------------------------------------------------------------------------- */
.billing-card--glass {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* Dark theme automatically handled by --glass-* variables in _semantic.css */

/* -----------------------------------------------------------------------------
   Interactive Cards (clickable)
   ----------------------------------------------------------------------------- */
.billing-card--interactive {
  cursor: pointer;
}

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

.billing-card--interactive:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .billing-card--interactive {
    transition: none;
  }
}

/* -----------------------------------------------------------------------------
   Card Header
   ----------------------------------------------------------------------------- */
.billing-card__header {
  margin-bottom: var(--space-md);
}

.billing-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  line-height: var(--leading-tight);
}

.billing-card__subtitle {
  margin: var(--space-xs) 0 0 0;
  font-family: var(--font-body);
  font-size: var(--text-size-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
}

/* -----------------------------------------------------------------------------
   Card Body
   ----------------------------------------------------------------------------- */
.billing-card__body {
  font-family: var(--font-body);
  font-size: var(--text-size-base);
  color: var(--text-primary);
  line-height: var(--leading-normal);
}

/* -----------------------------------------------------------------------------
   Card Footer (optional)
   ----------------------------------------------------------------------------- */
.billing-card__footer {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-default);
}

/* -----------------------------------------------------------------------------
   Card Divider
   ----------------------------------------------------------------------------- */
.billing-card__divider {
  height: 1px;
  margin: var(--space-md) 0;
  background: var(--border-default);
  border: none;
}