:root {
  /* ========================================
     Color Tokens
     ======================================== */

  /* Primary */
  --color-dark: #3A3A3A;
  --color-white: #FFFFFF;
  --bg-noise-texture: url('/noizu.png');

  /* Accent - Lime Green Gradient */
  --color-lime-start: #23FB1F;
  --color-lime-end: #B7FF00;
  --gradient-lime: linear-gradient(135deg, #23FB1F, #B7FF00);
  --gradient-lime-hover: linear-gradient(135deg, #1EE01B, #A3E600);
  --color-coral: #E8574B;
  --color-coral-dark: #D14438;

  /* Neutral */
  --color-charcoal: #242428;
  --color-charcoal-rgb: 36, 36, 40;
  --color-gray-900: #3A3A3A;
  --color-gray-700: #333333;
  --color-gray-500: #666666;
  --color-gray-300: #999999;
  --color-gray-100: #F5F5F5;
  --color-border: #E0E0E0;

  /* Semantic */
  --color-bg-dark: var(--color-dark);
  --color-bg-light: var(--color-white);
  --color-bg-subtle: var(--color-gray-100);
  --color-bg-accent: var(--gradient-lime);
  --color-bg-accent-alt: var(--color-coral);

  --color-text-on-dark: var(--color-white);
  --color-text-on-dark-muted: rgba(255, 255, 255, 0.7);
  --color-text-on-light: var(--color-dark);
  --color-text-on-light-muted: var(--color-gray-500);
  --color-text-on-accent: var(--color-dark);
  --color-text-on-coral: var(--color-white);

  /* ========================================
     Typography Tokens
     ======================================== */

  /* Font Family */
  --font-heading-en: "Montserrat", Arial, sans-serif;
  --font-body: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
  --font-label: "Inter", "Helvetica Neue", Arial, sans-serif;

  /* Font Size - Desktop */
  --text-hero: 3.5rem;       /* 56px */
  --text-display: 5rem;      /* 80px */
  --text-heading-lg: 2.5rem; /* 40px */
  --text-heading-md: 1.5rem; /* 24px */
  --text-heading-sm: 1.25rem;/* 20px */
  --text-body: 1rem;         /* 16px */
  --text-label: 0.875rem;    /* 14px */
  --text-small: 0.75rem;     /* 12px */

  /* Font Weight */
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Line Height */
  --leading-tight: 1.1;
  --leading-snug: 1.2;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;

  /* Letter Spacing */
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;

  /* ========================================
     Spacing Tokens
     ======================================== */

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 80px;
  --space-4xl: 120px;

  /* Section Spacing */
  --section-gap: var(--space-4xl);
  --section-inner-gap: var(--space-2xl);
  --heading-content-gap: var(--space-xl);

  /* ========================================
     Layout Tokens
     ======================================== */

  --container-max: 1360px;
  --container-padding: 80px;
  --grid-columns: 12;
  --grid-gutter: 24px;

  /* ========================================
     Border Radius Tokens
     ======================================== */

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 50px;
  --radius-circle: 50%;

  /* ========================================
     Shadow Tokens
     ======================================== */

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);

  /* ========================================
     Transition Tokens
     ======================================== */

  --duration-fast: 200ms;
  --duration-normal: 300ms;
  --duration-slow: 600ms;
  --ease-default: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);

  /* ========================================
     Breakpoints (reference only, use in @media)
     ======================================== */
  /* --bp-mobile:  767px  */
  /* --bp-tablet:  768px  */
  /* --bp-desktop: 1024px */
  /* --bp-wide:    1440px */
}

/* ========================================
   Responsive Overrides
   ======================================== */

@media (max-width: 1279px) {
  :root {
    --container-padding: 40px;
    --grid-gutter: 20px;
    --section-gap: 100px;
  }
}

@media (max-width: 767px) {
  :root {
    --text-hero: 2rem;
    --text-display: 2.5rem;
    --text-heading-lg: 1.75rem;
    --text-heading-md: 1.25rem;
    --text-heading-sm: 1rem;
    --text-body: 0.875rem;
    --text-label: 0.75rem;

    --container-padding: 20px;
    --grid-gutter: 16px;
    --section-gap: 80px;
    --section-inner-gap: 40px;
    --heading-content-gap: 32px;
  }
}