/**
 * Referral Program - Theme System
 *
 * Comprehensive dark/light mode implementation with orange/red branding.
 * This file handles theme switching and applies proper theming across all components.
 */

/* ============================================
   Theme Toggle Button
   ============================================ */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-glass);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

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

.theme-toggle__icon {
  width: 20px;
  height: 20px;
  color: var(--text-primary);
  transition: all var(--transition-normal);
}

.theme-toggle__icon--sun {
  display: none;
}

.theme-toggle__icon--moon {
  display: block;
}

[data-theme="dark"] .theme-toggle__icon--sun {
  display: block;
}

[data-theme="dark"] .theme-toggle__icon--moon {
  display: none;
}

/* ============================================
   Page Transitions
   ============================================ */
.referral-page,
.referral-card,
.referral-button,
.referral-input,
.referral-select {
  transition-property: background-color, border-color, color, box-shadow;
  transition-duration: var(--transition-normal);
  transition-timing-function: ease;
}

/* ============================================
   Dark Mode Specific Adjustments
   ============================================ */
[data-theme="dark"] {
  /* Enhanced contrast for readability */
  --text-primary: #ffffff;
  --text-secondary: #e0e0e0;
  --text-tertiary: #b0b0b0;
}

[data-theme="dark"] .referral-hero {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

[data-theme="dark"] .referral-card {
  background: var(--bg-glass);
  border-color: var(--border-primary);
}

[data-theme="dark"] .referral-card:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-accent);
}

[data-theme="dark"] .referral-input,
[data-theme="dark"] .referral-select,
[data-theme="dark"] .referral-textarea {
  background-color: var(--bg-secondary);
  border-color: var(--border-primary);
  color: var(--text-primary);
}

[data-theme="dark"] .referral-input::placeholder,
[data-theme="dark"] .referral-select::placeholder,
[data-theme="dark"] .referral-textarea::placeholder {
  color: var(--text-tertiary);
}

/* ============================================
   Light Mode Specific Adjustments
   ============================================ */
[data-theme="light"] .referral-hero {
  background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

[data-theme="light"] .referral-card {
  background: white;
  border-color: var(--border-primary);
}

[data-theme="light"] .glass-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
}

/* ============================================
   Brand Accent Highlights
   ============================================ */
.brand-accent {
  color: var(--brand-primary);
}

.brand-accent-bg {
  background-color: var(--brand-primary);
  color: white;
}

.brand-accent-border {
  border-color: var(--brand-primary);
}

/* Gradient text effect */
.brand-gradient-text {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

/* ============================================
   Loading States
   ============================================ */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

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

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.loading-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.loading-spin {
  animation: spin 1s linear infinite;
}

.loading-shimmer {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 0%,
    var(--bg-tertiary) 20%,
    var(--bg-secondary) 40%,
    var(--bg-secondary) 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* ============================================
   Accessibility Enhancements
   ============================================ */
.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;
}

/* Focus visible for keyboard navigation */
.referral-button:focus-visible,
.referral-input:focus-visible,
.referral-select:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
}

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

/* ============================================
   Print Styles
   ============================================ */
@media print {
  .theme-toggle,
  .referral-button,
  .referral-hero__cta {
    display: none;
  }

  .referral-page {
    background: white;
    color: black;
  }

  .referral-card {
    border: 1px solid #000;
    break-inside: avoid;
  }
}

/* ============================================
   High Contrast Mode Support
   ============================================ */
@media (prefers-contrast: high) {
  .referral-card {
    border-width: 2px;
  }

  .referral-button {
    border-width: 2px;
  }

  .referral-input,
  .referral-select {
    border-width: 2px;
  }
}