/* ==========================================
 * CSS Variables (Design System)
 * design-system.md Section 7 から移植
 * ========================================== */

/* Objective - Self-hosted */
@font-face {
  font-family: 'Objective';
  src: url('../fonts/Objective-Regular.woff2') format('woff2'),
       url('../fonts/Objective-Regular.otf') format('opentype');
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'Objective';
  src: url('../fonts/Objective-Medium.woff2') format('woff2'),
       url('../fonts/Objective-Medium.otf') format('opentype');
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: 'Objective';
  src: url('../fonts/Objective-Bold.woff2') format('woff2'),
       url('../fonts/Objective-Bold.otf') format('opentype');
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: 'Objective';
  src: url('../fonts/Objective-ExtraBold.woff2') format('woff2'),
       url('../fonts/Objective-ExtraBold.otf') format('opentype');
  font-weight: 800;
  font-display: swap;
}

:root {
  /* === Colors === */
  --color-dark-primary: #0A0A0A;
  --color-dark-secondary: #141414;
  --color-dark-surface: #1A1A1A;
  --color-light-primary: #FFFFFF;
  --color-light-secondary: #FAFAFA;
  --color-light-surface: #F0F0F0;
  --color-accent: #00D4FF;
  --color-accent-muted: #00A8CC;
  --color-accent-dark: #0077B6;
  --color-accent-darker: #005F8A;
  --color-text-primary: #1A1A1A;
  --color-text-body: #2E2E2E;
  --color-text-muted: #6B6B6B;
  --color-text-on-dark: #E8E8E8;
  --color-text-muted-on-dark: #999999;
  --color-text-white: #FFFFFF;
  --color-border-light: #E0E0E0;
  --color-border-subtle: #EEEEEE;
  --color-border-dark: #2A2A2A;
  --color-success: #22C55E;
  --color-error: #EF4444;
  --color-warning: #F59E0B;

  /* === Typography === */
  --font-heading-en: 'Objective', 'Arial Black', sans-serif;
  --font-section-en: 'Spectral', 'Georgia', 'Times New Roman', serif;
  --font-body-ja: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', 'Consolas', monospace;

  --text-hero: clamp(2.5rem, 2rem + 3.76vw, 5rem);
  --text-display: clamp(2rem, 1.5rem + 2.25vw, 3.5rem);
  --text-h1: clamp(1.75rem, 1.38rem + 1.88vw, 3rem);
  --text-h2: clamp(1.5rem, 1.28rem + 1.13vw, 2.25rem);
  --text-h3: clamp(1.25rem, 1.1rem + 0.75vw, 1.75rem);
  --text-h4: clamp(1.125rem, 1.05rem + 0.38vw, 1.375rem);
  --text-body: clamp(1rem, 0.96rem + 0.19vw, 1.125rem);
  --text-body-sm: clamp(0.875rem, 0.84rem + 0.19vw, 1rem);
  --text-caption: clamp(0.75rem, 0.71rem + 0.19vw, 0.875rem);
  --text-overline: clamp(0.688rem, 0.65rem + 0.19vw, 0.813rem);
  --text-price: clamp(1.25rem, 1rem + 1.25vw, 2.25rem);

  /* === Spacing === */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 80px;
  --space-9: 120px;
  --space-10: 160px;
  --space-hero: 200px;

  --container-narrow: 720px;
  --container-base: 1080px;
  --container-wide: 1280px;
  --container-padding: clamp(16px, 4vw, 40px);

  /* === Shadows === */
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.1);

  /* === Easing === */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* === Header === */
  --header-height-pc: 80px;
  --header-height-sp: 64px;

  /* === Z-index === */
  --z-header: 1000;
  --z-mobile-nav: 999;
  --z-side-nav: 100;
  --z-overlay: 998;
}