/* Design System Tokens */
:root {
  /* Primary Green */
  --color-green-900: #0A3D1F;
  --color-green-800: #155C3A;
  --color-green-700: #1F7A4E;
  --color-green-600: #2A9962;
  --color-green-500: #3DB87A;
  --color-green-200: #A8DFC4;
  --color-green-100: #D4EFE2;
  --color-green-50: #E8F5EE;
  --color-green-pale: #F2FAF6;

  /* Accent (CTA Orange) */
  --color-accent: #FF6B2B;
  --color-accent-dark: #E05520;
  --color-accent-light: #FFF3EE;

  /* Grayscale */
  --color-gray-900: #1A1A1A;
  --color-gray-700: #2B2B2B;
  --color-gray-500: #6B6B6B;
  --color-gray-300: #C8C8C8;
  --color-gray-200: #E2E2E2;
  --color-gray-100: #F4F4F4;
  --color-white: #FFFFFF;

  /* Typography - Font Stacks */
  --font-serif: 'Noto Serif JP', 'Yu Mincho', '游明朝', serif;
  --font-sans: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic UI', sans-serif;

  /* Type Scale */
  --text-hero: clamp(32px, 4.5vw, 52px);
  --text-h2: clamp(24px, 3vw, 38px);
  --text-h3: 22px;
  --text-h4: 18px;
  --text-body-lg: 16px;
  --text-body: 15px;
  --text-body-sm: 14px;
  --text-label: 12px;
  --text-caption: 11px;

  /* Font Weights */
  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-bold: 700;

  /* Line Heights */
  --leading-tight: 1.3;
  --leading-normal: 1.7;
  --leading-relaxed: 1.85;

  /* Spacing (8px grid) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 28px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-14: 56px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-28: 112px;
  --section-py: 100px;
  --section-py-sm: 64px;

  /* Layout */
  --max-width: 1140px;
  --gutter: 40px;
  --gutter-sm: 20px;
  --nav-height: 64px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-green: 0 6px 20px rgba(31, 122, 78, 0.15);
  --shadow-accent: 0 6px 20px rgba(255, 107, 43, 0.35);

  /* Letter Spacing */
  --letter-spacing-wide: 0.02em;
  --letter-spacing-wider: 0.05em;
  --letter-spacing-widest: 0.14em;

  /* Shadows - Spec */
  --shadow-card-hover: 0 4px 20px rgba(31, 122, 78, 0.12);
  --shadow-case-hover: 0 4px 20px rgba(31, 122, 78, 0.10);
  --shadow-btn-white-hover: 0 6px 20px rgba(0, 0, 0, 0.2);

  /* Icon Sizes */
  --icon-sm: 20px;
  --icon-md: 36px;
  --icon-lg: 48px;
  --icon-xl: 80px;

  /* Large Metric Typography */
  --text-metric: 44px;
  --text-metric-lg: 64px;
  --text-404: 120px;

  /* Transitions */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --duration-fast: 0.2s;
  --duration-normal: 0.3s;
  --duration-slow: 0.55s;
}

@media (max-width: 1024px) {
  :root {
    --section-py: 80px;
    --gutter: 24px;
  }
}

@media (max-width: 640px) {
  :root {
    --section-py: var(--section-py-sm);
    --gutter: var(--gutter-sm);
    --nav-height: 56px;
  }
}