/* ============================================
   Virtual Girlfriend Landing Page Styles
   Style: Neon Cyberpunk + Glassmorphism
   ============================================ */

/* ============================================
   1. Design Tokens
   ============================================ */
:root {
  /* Colors */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #14141f;
  --color-bg-card: rgba(20, 20, 35, 0.85);
  --color-bg-card-hover: rgba(30, 30, 50, 0.95);
  
  --color-accent-primary: #00d4aa;
  --color-accent-secondary: #ff6b9d;
  --color-accent-tertiary: #a78bfa;
  
  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-tertiary: rgba(255, 255, 255, 0.5);
  --color-text-muted: rgba(255, 255, 255, 0.4);
  
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-hover: rgba(255, 255, 255, 0.2);
  
  /* Typography */
  --font-heading: 'Outfit', 'Noto Sans SC', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', sans-serif;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow-primary: 0 0 30px rgba(0, 212, 170, 0.3);
  --shadow-glow-secondary: 0 0 30px rgba(255, 107, 157, 0.3);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-normal: 250ms ease-out;
  --transition-slow: 400ms ease-out;
  --transition-bounce: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================
   2. Reset & Base
   ============================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   3. Layout
   ============================================ */
.landing-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* Background Effects */
.bg-effects {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
}

.bg-glow--left {
  top: 20%;
  left: -200px;
  background: var(--color-accent-primary);
}

.bg-glow--right {
  bottom: 20%;
  right: -200px;
  background: var(--color-accent-secondary);
}

/* ============================================
   4. Header
   ============================================ */
.landing-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  position: relative;
  z-index: 10;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* ============================================
   5. Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  outline: none;
}

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

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid transparent;
}

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

.btn--outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-accent-primary);
  background: rgba(0, 212, 170, 0.1);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-accent-primary), #00b894);
  color: var(--color-bg-primary);
  font-weight: 600;
  box-shadow: var(--shadow-glow-primary);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(0, 212, 170, 0.4);
}

.btn--skip {
  padding: var(--spacing-md) var(--spacing-xl);
}

/* ============================================
   6. Hero Section
   ============================================ */
.hero-section {
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-xl) var(--spacing-xl);
  position: relative;
  z-index: 1;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* ============================================
   7. Character Grid
   ============================================ */
.character-section {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.character-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  max-width: 1100px;
  width: 100%;
  padding: var(--spacing-md);
}

/* ============================================
   8. Character Card
   ============================================ */
.character-card {
  position: relative;
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  cursor: pointer;
  transition: 
    transform var(--transition-normal),
    box-shadow var(--transition-normal);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  aspect-ratio: 3 / 4;
  min-height: 400px;
}

.character-card:hover {
  transform: translateY(-8px);
  box-shadow: 
    var(--shadow-lg),
    var(--shadow-glow-primary);
  border-color: var(--color-accent-primary);
}

.character-card:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 4px;
}

/* Card Image */
.character-card__image-wrapper {
  position: relative;
  width: 100%;
  height: 65%;
  overflow: hidden;
}

.character-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform var(--transition-slow);
}

.character-card:hover .character-card__image {
  transform: scale(1.05);
}

/* Card Content */
.character-card__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-lg);
  background: linear-gradient(
    to top,
    rgba(10, 10, 15, 0.95) 0%,
    rgba(10, 10, 15, 0.8) 50%,
    transparent 100%
  );
  transition: all var(--transition-normal);
}

.character-card__name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.character-card__name-zh {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  font-weight: 400;
}

.character-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
  margin-bottom: var(--spacing-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Detail Panel (hidden by default, shown on hover) */
.character-card__detail {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: 
    max-height var(--transition-normal),
    opacity var(--transition-normal);
}

.character-card:hover .character-card__detail {
  max-height: 200px;
  opacity: 1;
}

/* Tags */
.character-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.character-tag {
  display: inline-flex;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 500;
  background: rgba(0, 212, 170, 0.15);
  color: var(--color-accent-primary);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 212, 170, 0.3);
}

/* Info Grid */
.character-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
}

.character-info__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.character-info__icon {
  width: 14px;
  height: 14px;
  opacity: 0.6;
}

/* Traits */
.character-traits {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.character-trait {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
}

/* Action Button */
.character-card__action {
  width: 100%;
  padding: var(--spacing-md);
  margin-top: var(--spacing-sm);
  background: linear-gradient(135deg, var(--color-accent-primary), #00b894);
  color: var(--color-bg-primary);
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.character-card__action:hover {
  box-shadow: var(--shadow-glow-primary);
}

.character-card__action-arrow {
  transition: transform var(--transition-fast);
}

.character-card:hover .character-card__action-arrow {
  transform: translateX(4px);
}

/* ============================================
   9. Footer
   ============================================ */
.landing-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
  position: relative;
  z-index: 1;
}

.footer-text {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ============================================
   10. Animations
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.15;
  }
  50% {
    opacity: 0.25;
  }
}

.character-card {
  opacity: 0;
  animation: fadeInUp 0.5s ease-out forwards;
}

.character-card:nth-child(1) { animation-delay: 0.1s; }
.character-card:nth-child(2) { animation-delay: 0.2s; }
.character-card:nth-child(3) { animation-delay: 0.3s; }

.bg-glow {
  animation: pulse 8s ease-in-out infinite;
}

.bg-glow--right {
  animation-delay: 4s;
}

/* ============================================
   11. Responsive Design
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  .character-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    max-width: 800px;
  }
  
  .character-card {
    min-height: 350px;
  }
}

@media (max-width: 768px) {
  .landing-header {
    padding: var(--spacing-md);
  }
  
  .hero-section {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .character-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
  
  .character-card {
    min-height: 320px;
  }
  
  .character-card__image-wrapper {
    height: 55%;
  }
}

/* Mobile */
@media (max-width: 480px) {
  .landing-header {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .hero-section {
    padding: var(--spacing-md);
  }
  
  .hero-title {
    font-size: 1.5rem;
  }
  
  .hero-subtitle {
    font-size: 0.875rem;
  }
  
  .character-grid {
    grid-template-columns: 1fr;
    max-width: 320px;
  }
  
  .character-card {
    min-height: 380px;
  }
  
  .character-card__image-wrapper {
    height: 50%;
  }
  
  /* Mobile: always show detail (touch interaction) */
  .character-card__detail {
    max-height: none;
    opacity: 1;
  }
  
  .landing-footer {
    padding: var(--spacing-lg);
  }
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
  .character-card {
    border-width: 2px;
  }
  
  .character-tag {
    border-width: 2px;
  }
}

/* ============================================
   13. Print Styles
   ============================================ */
@media print {
  .bg-effects,
  .landing-header,
  .landing-footer {
    display: none;
  }
  
  .character-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }
}