/* BPI-12 脳タイプ診断 - デザインシステム */

/* =================================
   CSS変数（カラーパレット）
   ================================= */
:root {
  /* Primary Colors - Gradient Blue to Teal */
  --color-primary-start: #4A90E2;
  --color-primary-end: #5CC9A7;
  --color-accent: #00D9A3;
  --color-teal: #2DD4BF;
  
  /* Light Theme Base (White Background) */
  --color-dark-bg: #FFFFFF;
  --color-dark-surface: #F8F9FA;
  --color-dark-surface-light: #F1F3F5;
  --color-dark-border: #DEE2E6;
  
  /* Text Colors (Dark text for white background) */
  --color-text-primary: #1A1D29;
  --color-text-secondary: #495057;
  --color-text-muted: #6C757D;
  
  /* Semantic Colors */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary-start) 0%, var(--color-primary-end) 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-teal) 0%, var(--color-accent) 100%);
  --gradient-dark: linear-gradient(180deg, var(--color-dark-bg) 0%, var(--color-dark-surface) 100%);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px rgba(93, 201, 167, 0.3);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* =================================
   Base Styles
   ================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #FFFFFF;
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* =================================
   Typography
   ================================= */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  color: var(--color-text-primary);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.875rem);
  color: var(--color-text-primary);
}

p {
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.75;
}

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

.text-accent {
  color: var(--color-accent);
}

/* =================================
   Button Styles
   ================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
  background: var(--color-dark-surface-light);
  color: var(--color-text-primary);
  border: 1px solid var(--color-dark-border);
}

.btn-secondary:hover {
  background: var(--color-dark-surface);
  border-color: var(--color-teal);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: var(--color-dark-bg);
}

.btn-lg {
  padding: 1.125rem 2.5rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
}

/* =================================
   Card Styles
   ================================= */
.card {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-teal);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-gradient {
  background: var(--gradient-dark);
  position: relative;
  overflow: hidden;
}

.card-gradient::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
}

/* =================================
   Badge Styles
   ================================= */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  gap: 0.375rem;
}

.badge-primary {
  background: rgba(93, 201, 167, 0.15);
  color: var(--color-accent);
  border: 1px solid rgba(93, 201, 167, 0.3);
}

.badge-secondary {
  background: rgba(74, 144, 226, 0.15);
  color: var(--color-primary-start);
  border: 1px solid rgba(74, 144, 226, 0.3);
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease-out;
}

.animate-slideInLeft {
  animation: slideInLeft 0.6s ease-out;
}

.animate-slideInRight {
  animation: slideInRight 0.6s ease-out;
}

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

/* =================================
   Custom Scrollbar
   ================================= */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-dark-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-dark-surface-light);
  border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-teal);
}

/* =================================
   Container & Layout
   ================================= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-3xl) 0;
}

/* =================================
   Progress Bar
   ================================= */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--color-dark-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  transition: width var(--transition-slow);
}

/* =================================
   Radio & Checkbox Styles
   ================================= */
.radio-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.radio-item {
  position: relative;
}

.radio-item input[type="radio"] {
  position: absolute;
  opacity: 0;
}

.radio-item label {
  display: block;
  padding: 0.75rem 1.5rem;
  background: var(--color-dark-surface);
  border: 2px solid var(--color-dark-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.radio-item input[type="radio"]:checked + label {
  background: rgba(93, 201, 167, 0.1);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.radio-item label:hover {
  border-color: var(--color-teal);
}

/* =================================
   Responsive Design
   ================================= */
@media (max-width: 768px) {
  :root {
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
  }
  
  .container,
  .container-wide {
    padding: 0 var(--space-md);
  }
  
  .card {
    padding: var(--space-lg);
  }
  
  .btn {
    width: 100%;
  }
  
  .radio-group {
    flex-direction: column;
  }
}

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

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }