/**
 * Industry Design System — Design Tokens & Base Styles
 */

:root {
  color-scheme: light dark;
  --color-bg-light: #f2f2f3;
  --color-bg-dark: #0f141c;
  --color-surface-light: #e9e9ea;
  --color-surface-dark: #161d28;
  --color-text-light: #1d1f20;
  --color-text-dark: #f0f4f8;
  --color-accent-light: #5980a6;
  --color-accent-dark: #749dc4;
  --color-bg: #f2f2f3;
  --color-bg: light-dark(var(--color-bg-light), var(--color-bg-dark));
  --color-surface: #e9e9ea;
  --color-surface: light-dark(var(--color-surface-light), var(--color-surface-dark));
  --color-text: #1d1f20;
  --color-text: light-dark(var(--color-text-light), var(--color-text-dark));
  --color-accent: #5980a6;
  --color-accent: light-dark(var(--color-accent-light), var(--color-accent-dark));
  accent-color: #5980a6;
  accent-color: light-dark(var(--color-accent-light), var(--color-accent-dark));
  --color-accent-2: #728fab;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);

  /* Tonal ramps — generated in OKLCH on one shared lightness scale, so the
     same step of any role matches the others in visual value. */
  --color-neutral-100: #f5f5f8;
  --color-neutral-200: #e7e7ea;
  --color-neutral-300: #d4d4d7;
  --color-neutral-400: #b7b7ba;
  --color-neutral-500: #98989b;
  --color-neutral-600: #7a7a7d;
  --color-neutral-700: #5d5d60;
  --color-neutral-800: #424244;
  --color-neutral-900: #2b2b2d;

  --color-accent-100: #eef6ff;
  --color-accent-200: #d6ebff;
  --color-accent-300: #b5d9fd;
  --color-accent-400: #94bce3;
  --color-accent-500: #749dc4;
  --color-accent-600: #597ea3;
  --color-accent-700: #416180;
  --color-accent-800: #2c455d;
  --color-accent-900: #1d2d3d;

  --color-accent-2-100: #eef6ff;
  --color-accent-2-200: #d6ebff;
  --color-accent-2-300: #bdd8f2;
  --color-accent-2-400: #9ebbd8;
  --color-accent-2-500: #7e9cb8;
  --color-accent-2-600: #627d98;
  --color-accent-2-700: #486077;
  --color-accent-2-800: #314457;
  --color-accent-2-900: #1f2d3a;

  --font-heading: "IBM Plex Sans Condensed", "Barlow Condensed", system-ui, sans-serif;
  --font-heading-weight: 600;
  --font-body: "IBM Plex Sans", "Barlow", system-ui, sans-serif;

  --space-1: 3.4px;
  --space-2: 6.8px;
  --space-3: 10.2px;
  --space-4: 13.6px;
  --space-6: 20.4px;
  --space-8: 27.2px;

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 7px;

  /* Elevation — derived from the ground: soft ink-tinted shadows on a
     light theme, a hairline edge + ambient darkness on a dark one. */
  --shadow-sm: 0 1px 2px color-mix(in srgb, #2b2b2d 14%, transparent);
  --shadow-md: 0 3px 10px color-mix(in srgb, #2b2b2d 16%, transparent);
  --shadow-lg: 0 12px 32px color-mix(in srgb, #2b2b2d 22%, transparent);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent) var(--color-surface);
  scrollbar-gutter: stable;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-accent);
  border-radius: 4px;
}

body {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  font-weight: 400;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  text-wrap: pretty;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-2);
  text-wrap: balance;
}

h1 { font-size: 42px; font-size: clamp(2rem, 1.4rem + 2.5vw, 3.25rem); }
h2 { font-size: 32px; font-size: clamp(1.6rem, 1.2rem + 1.8vw, 2.5rem); }
h3 { font-size: 25px; font-size: clamp(1.3rem, 1.05rem + 1.1vw, 1.85rem); }
h4 { font-size: 20px; font-size: clamp(1.15rem, 0.95rem + 0.8vw, 1.45rem); }
h5 { font-size: 16px; font-size: clamp(1rem, 0.9rem + 0.4vw, 1.2rem); }
h6 { font-size: 13px; font-size: clamp(0.85rem, 0.8rem + 0.25vw, 1rem); letter-spacing: 0.08em; text-transform: uppercase; }

p {
  margin: 0 0 var(--space-3);
}

a {
  color: var(--color-accent-700);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--color-accent-800);
}

img {
  display: block;
  max-width: 100%;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 11px;
  margin-top: var(--space-1);
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

::selection {
  background: color-mix(in srgb, var(--color-accent) 30%, transparent);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}