/**
 * Japan Souvenirs Finder - Modern Mobile-First Styles
 * Design System: Premium, Clean, International UX
 */

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

:root {
  /* Traditional Japanese Colors (日本の伝統色) */
  --color-hinomaru-red: #BC002D; /* 日の丸の赤 - Flag red */
  --color-japan-red: #BC002D;
  --color-japan-red-dark: #8B0000;
  --color-japan-red-light: #D32F2F;
  --color-kinpaku-gold: #D4AF37; /* 金箔 - Gold leaf */
  --color-japan-gold: #D4AF37;
  --color-japan-gold-light: #F4E5C2;
  
  /* Traditional Color Accents */
  --color-sakura-pink: #FFEEF6; /* 桜色 - Cherry blossom */
  --color-fuji-blue: #A5DEE5; /* 富士の雪 - Mt. Fuji snow */
  --color-matcha-green: #A8C090; /* 抹茶 - Matcha green */
  --color-indigo-blue: #2E4057; /* 藍色 - Indigo */
  --color-sumi-black: #1A1A1A; /* 墨 - Ink black */
  --color-washi-white: #F9F7F4; /* 和紙 - Japanese paper */
  
  /* Primary Colors */
  --color-primary: #BC002D;
  --color-primary-dark: #8B0000;
  --color-primary-light: #D32F2F;
  --color-primary-glow: rgba(188, 0, 45, 0.15);
  
  /* Secondary Colors */
  --color-secondary: #D4AF37;
  --color-accent-travel: #3B82F6;
  --color-accent-ship: #10B981;
  
  /* Semantic Colors */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;
  --color-info: #3B82F6;
  
  /* Grays */
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  
  /* Gradients */
  --gradient-japan: linear-gradient(135deg, #BC002D 0%, #D4AF37 100%);
  --gradient-primary: linear-gradient(135deg, #BC002D 0%, #8B0000 100%);
  --gradient-travel: linear-gradient(135deg, #3B82F6 0%, #10B981 100%);
  --gradient-shimmer: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  --gradient-sakura: linear-gradient(135deg, #FFEEF6 0%, #FFFFFF 100%);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-900);
  background: var(--color-gray-50);
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

/* ==================== Screens ==================== */
.screen {
  display: none;
  animation: fadeIn var(--transition-slow);
}

.screen.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==================== Container ==================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-6);
  }
}

/* ==================== Hero Section ==================== */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-washi-white);
}

.hero-background {
  position: absolute;
  inset: 0;
  background:
    /* Subtle overlay for readability */
    linear-gradient(180deg, rgba(249, 247, 244, 0.4) 0%, rgba(249, 247, 244, 0.6) 100%),
    /* Japanese gifts illustration */
    url('/images/hero-background.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  pointer-events: none;
}

/* 富士山 Mount Fuji Silhouette */
.hero::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 180px;
  background: linear-gradient(to top, 
    rgba(165, 222, 229, 0.04) 0%, 
    rgba(165, 222, 229, 0.02) 50%,
    transparent 100%);
  clip-path: polygon(
    0% 100%, 
    5% 100%, 
    15% 85%, 
    25% 75%, 
    35% 65%, 
    45% 50%, 
    50% 45%, 
    55% 50%, 
    65% 65%, 
    75% 75%, 
    85% 85%, 
    95% 100%, 
    100% 100%
  );
  opacity: 0.7;
  z-index: 0;
  pointer-events: none;
}

/* Sakura decoration removed - using background image with sakura */

.hero-content {
  position: relative;
  text-align: center;
  padding: var(--spacing-12) 0;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: var(--spacing-2) var(--spacing-4);
  background: linear-gradient(135deg, var(--color-hinomaru-red) 0%, var(--color-kinpaku-gold) 100%);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-6);
  box-shadow: 
    0 10px 15px -3px rgba(188, 0, 45, 0.2),
    0 4px 6px -2px rgba(188, 0, 45, 0.1);
  animation: float 3s ease-in-out infinite;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-6);
  color: var(--color-gray-900);
}

.gradient-text {
  background: var(--gradient-japan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-8);
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-10);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  background: var(--gradient-japan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  margin-top: var(--spacing-1);
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: var(--spacing-4);
  margin-top: var(--spacing-8);
  flex-wrap: wrap;
}

.feature-badge {
  padding: var(--spacing-2) var(--spacing-4);
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
  .hero-title {
    font-size: var(--font-size-5xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-xl);
  }
}

@media (max-width: 640px) {
  .hero {
    min-height: 80vh;
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-stats {
    gap: var(--spacing-6);
  }
  
  .stat-number {
    font-size: var(--font-size-2xl);
  }
}

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4) var(--spacing-8);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
  text-decoration: none;
  font-family: inherit;
}

.btn-hero {
  padding: var(--spacing-5) var(--spacing-10);
  font-size: var(--font-size-lg);
  background: linear-gradient(135deg, var(--color-hinomaru-red) 0%, var(--color-kinpaku-gold) 100%);
  color: white;
  box-shadow: 
    0 10px 15px -3px rgba(188, 0, 45, 0.2),
    0 4px 6px -2px rgba(188, 0, 45, 0.1);
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn-hero:hover::before {
  left: 100%;
}

.btn-hero:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2xl);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-hinomaru-red) 0%, var(--color-kinpaku-gold) 100%);
  color: white;
  box-shadow: 
    0 10px 15px -3px rgba(188, 0, 45, 0.2),
    0 4px 6px -2px rgba(188, 0, 45, 0.1);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

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

.btn-secondary {
  background: white;
  color: var(--color-japan-red);
  border: 2px solid var(--color-japan-red);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--color-japan-red);
  color: white;
}

.btn-arrow {
  transition: transform var(--transition-base);
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ==================== TL;DR Box ==================== */
.tldr-box {
  background: white;
  border: 2px solid var(--color-primary-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  margin: var(--spacing-12) 0;
  box-shadow: var(--shadow-lg);
}

.tldr-box h2 {
  font-size: var(--font-size-2xl);
  color: var(--color-japan-red);
  margin-bottom: var(--spacing-4);
}

.tldr-box p {
  font-size: var(--font-size-base);
  line-height: 1.8;
  margin-bottom: var(--spacing-4);
  color: var(--color-gray-700);
}

.tldr-box strong {
  color: var(--color-japan-red);
  font-weight: 600;
}

.source-links {
  font-size: var(--font-size-sm);
  border-top: 1px solid var(--color-gray-200);
  padding-top: var(--spacing-4);
  margin-top: var(--spacing-6);
}

.source-links a {
  color: var(--color-accent-travel);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent-travel);
  transition: color var(--transition-fast);
}

.source-links a:hover {
  color: var(--color-japan-red);
  border-bottom-color: var(--color-japan-red);
}

/* ==================== Progress Bar ==================== */
.progress-bar {
  display: flex;
  justify-content: center;
  gap: var(--spacing-6);
  margin: var(--spacing-8) 0;
  padding: var(--spacing-6);
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-2);
  position: relative;
}

.progress-step::before {
  content: '';
  position: absolute;
  top: 20px;
  left: 50%;
  width: 100%;
  height: 2px;
  background: var(--color-gray-300);
  z-index: -1;
}

.progress-step:first-child::before {
  display: none;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-gray-200);
  color: var(--color-gray-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
}

.progress-step.active .step-number {
  background: var(--gradient-japan);
  color: white;
  box-shadow: var(--shadow-md);
  transform: scale(1.1);
}

.progress-step.completed .step-number {
  background: var(--color-success);
  color: white;
}

.step-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  font-weight: 500;
  text-align: center;
}

.progress-step.active .step-label {
  color: var(--color-japan-red);
  font-weight: 600;
}

@media (max-width: 640px) {
  .progress-bar {
    gap: var(--spacing-3);
    padding: var(--spacing-4);
  }
  
  .step-number {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-sm);
  }
  
  .step-label {
    font-size: var(--font-size-xs);
  }
}

/* ==================== Section Headers ==================== */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-10);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-3);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
}

@media (max-width: 640px) {
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .section-subtitle {
    font-size: var(--font-size-base);
  }
}

/* ==================== Travel Mode Grid ==================== */
.travel-mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-8);
}

.travel-mode-card {
  background: white;
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

/* 青海波 Seigaiha Wave Pattern */
.travel-mode-card::after {
  content: '';
  position: absolute;
  bottom: -10px;
  right: -10px;
  width: 120px;
  height: 60px;
  background-image: 
    radial-gradient(circle at 50% 100%, 
      transparent 38%, 
      rgba(188, 0, 45, 0.03) 39%, 
      rgba(188, 0, 45, 0.03) 48%, 
      transparent 49%),
    radial-gradient(circle at 50% 100%, 
      transparent 38%, 
      rgba(188, 0, 45, 0.02) 39%, 
      rgba(188, 0, 45, 0.02) 48%, 
      transparent 49%);
  background-size: 40px 20px, 40px 20px;
  background-position: 0 0, 20px 0;
  opacity: 0.6;
  pointer-events: none;
  z-index: 1;
}

.travel-mode-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s;
  z-index: 2;
}

.travel-mode-card:hover::before {
  left: 100%;
}

.travel-mode-card:hover {
  border-color: var(--color-hinomaru-red);
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.travel-mode-card.selected {
  border-color: var(--color-hinomaru-red);
  background: var(--gradient-sakura);
  box-shadow: var(--shadow-lg);
}

.mode-icon {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-4);
}

.mode-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
}

.mode-description {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-4);
}

.mode-features {
  list-style: none;
  margin-bottom: var(--spacing-6);
}

.mode-features li {
  padding: var(--spacing-2) 0;
  color: var(--color-gray-700);
  font-size: var(--font-size-sm);
}

.mode-badge {
  display: inline-block;
  padding: var(--spacing-2) var(--spacing-4);
  background: var(--gradient-japan);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.mode-badge-alt {
  background: var(--gradient-travel);
}

@media (max-width: 768px) {
  .travel-mode-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
}

/* ==================== Questions ==================== */

/* Stage Indicator */
.stage-indicator-container {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-6);
  margin-top: var(--spacing-8);
  padding: 0 var(--spacing-4);
}

.stage-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-2);
}

.stage-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-gray-200);
  color: var(--color-gray-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-lg);
  transition: all var(--transition-base);
}

.stage-step.active .stage-number {
  background: var(--color-japan-red);
  color: white;
  box-shadow: 0 0 0 4px rgba(188, 0, 45, 0.1);
}

.stage-step.completed .stage-number {
  background: var(--color-success);
  color: white;
}

.stage-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  font-weight: 500;
}

.stage-step.active .stage-label {
  color: var(--color-japan-red);
  font-weight: 600;
}

.stage-connector {
  width: 60px;
  height: 2px;
  background: var(--color-gray-200);
  margin: 0 var(--spacing-2);
  margin-bottom: 24px;
}

/* Progress Bar */
.progress-container {
  margin-bottom: var(--spacing-6);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--color-gray-200);
  border-radius: 999px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-japan-red) 0%, var(--color-japan-gold) 100%);
  transition: width 0.3s ease;
  border-radius: 999px;
}

.progress-text {
  flex-shrink: 0;
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  font-weight: 600;
  min-width: 50px;
  text-align: right;
}

/* Question Card */
.question-card {
  display: none;
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-lg);
  animation: slideIn var(--transition-slow);
}

.question-card.active {
  display: block;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.question-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-6);
  text-align: center;
}

.question-hint {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  text-align: center;
  margin-bottom: var(--spacing-6);
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-8);
}

.options-grid-2col {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.options-grid-3col {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.option-card {
  position: relative;
  cursor: pointer;
}

.option-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.option-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-6);
  background: white;
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  min-height: 100px;
}

.option-card:hover .option-content {
  border-color: var(--color-japan-red);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.option-card input[type="radio"]:checked + .option-content {
  border-color: var(--color-japan-red);
  background: linear-gradient(135deg, 
    rgba(211, 47, 47, 0.05) 0%, 
    rgba(245, 158, 11, 0.05) 100%);
  box-shadow: var(--shadow-lg);
}

.option-icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-2);
}

.option-label {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-gray-900);
  text-align: center;
}

.option-sublabel {
  font-size: var(--font-size-xs);
  color: var(--color-gray-600);
  margin-top: var(--spacing-1);
  text-align: center;
}

.text-input {
  width: 100%;
  padding: var(--spacing-4);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-family: inherit;
  resize: vertical;
  transition: border-color var(--transition-fast);
  margin-bottom: var(--spacing-6);
}

.text-input:focus {
  outline: none;
  border-color: var(--color-japan-red);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.question-actions {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-4);
  margin-top: var(--spacing-8);
}

/* Hide Next buttons - auto-advance on selection */
.question-actions .next-btn {
  display: none;
}

@media (max-width: 640px) {
  .question-card {
    padding: var(--spacing-6);
  }
  
  .question-title {
    font-size: var(--font-size-xl);
  }
  
  .options-grid {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-3);
  }
  
  .option-content {
    padding: var(--spacing-4);
    min-height: 80px;
  }
}

/* ==================== Loading Screen ==================== */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 4px solid var(--color-gray-200);
  border-top-color: var(--color-japan-red);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-6);
}

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

.loading-text {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-10);
}

.loading-stages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-6);
  max-width: 900px;
}

.stage-item {
  background: white;
  padding: var(--spacing-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  animation: pulse 2s ease-in-out infinite;
}

.stage-item:nth-child(1) {
  animation-delay: 0s;
}

.stage-item:nth-child(2) {
  animation-delay: 0.5s;
}

.stage-item:nth-child(3) {
  animation-delay: 1s;
}

.stage-item:nth-child(4) {
  animation-delay: 1.5s;
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.6;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
}

.stage-icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-2);
}

.stage-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
}

@media (max-width: 768px) {
  .loading-stages {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
}

/* ==================== Results ==================== */
.results-header {
  text-align: center;
  margin-bottom: var(--spacing-10);
}

.results-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-3);
}

.results-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
}

.recommendation-reason {
  background: linear-gradient(135deg, #fff5f5 0%, #ffe8e8 100%);
  border-left: 4px solid var(--color-japan-red);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  margin: var(--spacing-6) 0;
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-4);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.reason-icon {
  font-size: var(--font-size-2xl);
  flex-shrink: 0;
  line-height: 1;
}

.reason-text {
  font-size: var(--font-size-base);
  color: var(--color-gray-800);
  line-height: 1.6;
}

#results-count {
  font-weight: 700;
  color: var(--color-japan-red);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-12);
}

.product-card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
}

/* 青海波 Seigaiha Wave Pattern for Product Cards */
.product-card::after {
  content: '';
  position: absolute;
  bottom: -10px;
  right: -10px;
  width: 120px;
  height: 60px;
  background-image: 
    radial-gradient(circle at 50% 100%, 
      transparent 38%, 
      rgba(188, 0, 45, 0.03) 39%, 
      rgba(188, 0, 45, 0.03) 48%, 
      transparent 49%),
    radial-gradient(circle at 50% 100%, 
      transparent 38%, 
      rgba(188, 0, 45, 0.02) 39%, 
      rgba(188, 0, 45, 0.02) 48%, 
      transparent 49%);
  background-size: 40px 20px, 40px 20px;
  background-position: 0 0, 20px 0;
  opacity: 0.6;
  pointer-events: none;
  z-index: 1;
}

.product-card:hover {
  box-shadow: var(--shadow-2xl);
  transform: translateY(-4px);
}

.product-rank {
  position: absolute;
  top: var(--spacing-4);
  left: var(--spacing-4);
  background: linear-gradient(135deg, var(--color-kinpaku-gold) 0%, var(--color-hinomaru-red) 100%);
  color: white;
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 700;
  box-shadow: 
    0 4px 6px -1px rgba(212, 175, 55, 0.3),
    0 2px 4px -1px rgba(212, 175, 55, 0.2);
  z-index: 10;
}

.product-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.product-content {
  padding: var(--spacing-6);
}

.product-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-description {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-3);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-4);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
}

.travel-badge {
  display: inline-block;
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  white-space: nowrap;
}

.travel-badge.carry-on-safe {
  background: var(--color-success);
  color: white;
}

.travel-badge.ship-recommended {
  background: var(--color-warning);
  color: white;
}

.travel-badge.prohibited {
  background: var(--color-danger);
  color: white;
}

.travel-badge.fragile {
  background: var(--color-info);
  color: white;
}

.souvenir-score {
  background: var(--gradient-japan);
  color: white;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.price-display {
  margin-bottom: var(--spacing-4);
}

.price-primary {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-japan-red);
  margin-bottom: var(--spacing-1);
}

.price-conversions {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

.product-meta {
  display: flex;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-4);
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

.restart-btn {
  display: block;
  margin: var(--spacing-8) auto;
}

@media (max-width: 768px) {
  .results-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
}

/* ==================== Utility Classes ==================== */
.text-center {
  text-align: center;
}

.hidden {
  display: none;
}

/* ==================== 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;
}

/* ==================== Responsive Tweaks ==================== */
@media (max-width: 480px) {
  :root {
    --font-size-3xl: 1.5rem;
    --font-size-4xl: 2rem;
    --font-size-5xl: 2.5rem;
  }
  
  .container {
    padding: 0 var(--spacing-3);
  }
  
  .btn {
    padding: var(--spacing-3) var(--spacing-6);
  }
  
  .btn-hero {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-base);
  }
}


/* ==================== Section Divider with Sakura ==================== */
.section-divider {
  position: relative;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--spacing-12) 0;
}

.section-divider::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(188, 0, 45, 0.2) 50%,
    transparent 100%
  );
}

.section-divider::after {
  content: '🌸';
  font-size: 32px;
  background: var(--color-washi-white);
  padding: 0 var(--spacing-4);
  opacity: 0.6;
  position: relative;
  z-index: 1;
}


/* ==================== Header ==================== */
.header {
  background: linear-gradient(135deg, var(--color-hinomaru-red) 0%, var(--color-kinpaku-gold) 100%);
  color: white;
  padding: var(--spacing-6) 0;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-lg);
}

.logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-3);
}

.logo-icon {
  font-size: var(--font-size-3xl);
  animation: float 3s ease-in-out infinite;
}

.logo-text {
  letter-spacing: 0.02em;
}

.tagline {
  margin-top: var(--spacing-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
  opacity: 0.95;
  letter-spacing: 0.05em;
}

@media (max-width: 640px) {
  .header {
    padding: var(--spacing-4) 0;
  }
  
  .logo {
    font-size: var(--font-size-xl);
    flex-direction: column;
    gap: var(--spacing-2);
  }
  
  .logo-icon {
    font-size: var(--font-size-2xl);
  }
  
  .tagline {
    font-size: var(--font-size-xs);
  }
}

/* ==================== Mount Fuji removed - using background image ==================== */

/* ==================== Footer ==================== */
.footer {
  background: linear-gradient(180deg, var(--color-washi-white) 0%, var(--color-gray-100) 100%);
  border-top: 3px solid var(--color-hinomaru-red);
  padding: var(--spacing-16) 0 var(--spacing-8);
  margin-top: var(--spacing-20);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-10);
  margin-bottom: var(--spacing-12);
}

.footer-section {
  color: var(--color-gray-700);
}

.footer-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-hinomaru-red);
  margin-bottom: var(--spacing-4);
}

.footer-title-sub {
  font-size: var(--font-size-base);
  margin-top: var(--spacing-6);
  margin-bottom: var(--spacing-3);
}

.footer-description {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  margin-bottom: var(--spacing-4);
  color: var(--color-gray-600);
}

.footer-operator {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

.footer-operator a {
  color: var(--color-hinomaru-red);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.footer-operator a:hover {
  color: var(--color-kinpaku-gold);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--spacing-2);
}

.footer-links a {
  color: var(--color-gray-700);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--color-hinomaru-red);
  transform: translateX(4px);
}

.footer-disclosure {
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  margin-bottom: var(--spacing-8);
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: 1.8;
}

.footer-disclosure strong {
  color: var(--color-gray-900);
  font-weight: 600;
}

.footer-copyright {
  text-align: center;
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-gray-300);
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
}

.footer-powered {
  margin-top: var(--spacing-2);
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

@media (max-width: 768px) {
  .footer {
    padding: var(--spacing-12) 0 var(--spacing-6);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }
}

/* ==================== Sakura Falling Animation ==================== */
.sakura-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  overflow: hidden;
}

.sakura-petal {
  position: absolute;
  font-size: 20px;
  color: #FFD4E0;
  opacity: 0.3;
  animation: sakura-fall linear infinite;
  text-shadow: 0 0 3px rgba(255, 212, 224, 0.2);
}

@keyframes sakura-fall {
  0% {
    transform: translateY(-100px) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.3;
  }
  90% {
    opacity: 0.3;
  }
  100% {
    transform: translateY(100vh) rotate(360deg);
    opacity: 0;
  }
}

/* Sakura swaying animation */
.sakura-petal:nth-child(odd) {
  animation-name: sakura-fall-sway-left;
}

.sakura-petal:nth-child(even) {
  animation-name: sakura-fall-sway-right;
}

@keyframes sakura-fall-sway-left {
  0% {
    transform: translateY(-100px) translateX(0) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.3;
  }
  25% {
    transform: translateY(25vh) translateX(-30px) rotate(90deg);
  }
  50% {
    transform: translateY(50vh) translateX(0) rotate(180deg);
  }
  75% {
    transform: translateY(75vh) translateX(-30px) rotate(270deg);
  }
  90% {
    opacity: 0.3;
  }
  100% {
    transform: translateY(100vh) translateX(0) rotate(360deg);
    opacity: 0;
  }
}

@keyframes sakura-fall-sway-right {
  0% {
    transform: translateY(-100px) translateX(0) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.3;
  }
  25% {
    transform: translateY(25vh) translateX(30px) rotate(90deg);
  }
  50% {
    transform: translateY(50vh) translateX(0) rotate(180deg);
  }
  75% {
    transform: translateY(75vh) translateX(30px) rotate(270deg);
  }
  90% {
    opacity: 0.3;
  }
  100% {
    transform: translateY(100vh) translateX(0) rotate(360deg);
    opacity: 0;
  }
}