/* ==========================================================================
   VARIABLES — Design tokens, themes, typography scale
   ========================================================================== */

:root {
  /* Typography */
  --font-display: "Instrument Serif", Georgia, "Times New Roman", serif;
  --font-body: "Outfit", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.82rem + 0.3vw, 0.9375rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.25rem);
  --text-xl: clamp(1.375rem, 1.2rem + 0.75vw, 1.75rem);
  --text-2xl: clamp(1.75rem, 1.4rem + 1.5vw, 2.5rem);
  --text-3xl: clamp(2.25rem, 1.6rem + 2.5vw, 3.5rem);
  --text-4xl: clamp(3rem, 2rem + 4vw, 5.5rem);
  --text-hero: clamp(3.5rem, 2.5rem + 5vw, 7.5rem);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 10rem;

  /* Layout */
  --container-max: 1400px;
  --container-padding: clamp(1.25rem, 4vw, 3rem);
  --section-padding: clamp(5rem, 10vw, 9rem);
  --nav-height: 80px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Motion */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out-expo: cubic-bezier(0.87, 0, 0.13, 1);
  --duration-fast: 0.25s;
  --duration-normal: 0.5s;
  --duration-slow: 0.8s;

  /* Z-index layers */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-cursor: 500;
  --z-loader: 600;
}

/* --------------------------------------------------------------------------
   DARK THEME (default) — Luxury black, glass, soft gradients
   -------------------------------------------------------------------------- */
[data-theme="dark"],
:root {
  --color-bg: #08080a;
  --color-bg-elevated: #111114;
  --color-bg-card: rgba(255, 255, 255, 0.04);
  --color-surface: #16161a;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.18);

  --color-text: #f4f4f5;
  --color-text-muted: rgba(244, 244, 245, 0.55);
  --color-text-subtle: rgba(244, 244, 245, 0.35);

  --color-accent: #2dd4bf;
  --color-accent-secondary: #38bdf8;
  --color-accent-glow: rgba(45, 212, 191, 0.35);
  --color-accent-muted: rgba(45, 212, 191, 0.15);

  --color-gradient-start: #0d9488;
  --color-gradient-end: #0284c7;

  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-blur: 20px;
  /* Solid "glass look" for repeated cards — avoids costly backdrop-filter */
  --card-solid: #131318;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 60px var(--color-accent-glow);

  --noise-opacity: 0.04;
  --cursor-blend: difference;
  --spotlight-color: rgba(45, 212, 191, 0.08);
}

/* --------------------------------------------------------------------------
   LIGHT THEME — Pure white, luxury minimal, elegant cards
   -------------------------------------------------------------------------- */
[data-theme="light"] {
  --color-bg: #fafafa;
  --color-bg-elevated: #ffffff;
  --color-bg-card: rgba(0, 0, 0, 0.02);
  --color-surface: #f0f0f2;
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-hover: rgba(0, 0, 0, 0.16);

  --color-text: #0f172a;
  --color-text-muted: rgba(15, 23, 42, 0.6);
  --color-text-subtle: rgba(15, 23, 42, 0.4);

  --color-accent: #0d9488;
  --color-accent-secondary: #0369a1;
  --color-accent-glow: rgba(13, 148, 136, 0.25);
  --color-accent-muted: rgba(13, 148, 136, 0.1);

  --color-gradient-start: #0d9488;
  --color-gradient-end: #0369a1;

  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(0, 0, 0, 0.06);
  --glass-blur: 24px;
  --card-solid: #ffffff;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 40px var(--color-accent-glow);

  --noise-opacity: 0.03;
  --cursor-blend: normal;
  --spotlight-color: rgba(13, 148, 136, 0.06);
}