/* ============================================================
   IndustrCons IRE-3 — CORE
   Design tokens, reset, typography, utilities.
   ============================================================ */

/* ---- Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root{
  /* Brand (locked) */
  --blue: #005BAA;
  --blue-600: #00498a;
  --blue-50: #eaf2fa;
  --orange: #F7941D;
  --orange-600: #d97e0e;
  --navy: #0F172A;
  --gray-50: #F8FAFC;
  --white: #FFFFFF;

  /* Derived neutrals (light mode) */
  --ink: #101826;
  --ink-soft: #4b5568;
  --line: #e2e8f0;
  --line-soft: #edf1f7;
  --surface: #ffffff;
  --surface-2: #F8FAFC;
  --surface-3: #eef2f7;
  --shadow-color: 222deg 45% 24%;

  /* Semantic */
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;

  /* Type */
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', monospace;

  /* Scale */
  --step--1: clamp(0.8rem, 0.78rem + 0.1vw, 0.875rem);
  --step-0: clamp(1rem, 0.97rem + 0.15vw, 1.0625rem);
  --step-1: clamp(1.2rem, 1.13rem + 0.35vw, 1.35rem);
  --step-2: clamp(1.5rem, 1.36rem + 0.7vw, 1.85rem);
  --step-3: clamp(1.9rem, 1.65rem + 1.2vw, 2.5rem);
  --step-4: clamp(2.4rem, 2rem + 2vw, 3.4rem);
  --step-5: clamp(3rem, 2.4rem + 3vw, 4.6rem);

  /* Layout */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --sidebar-w: 264px;
  --nav-h: 68px;
  --container: 1240px;

  /* Motion */
  --ease: cubic-bezier(.2,.7,.3,1);
  --dur-fast: 150ms;
  --dur: 320ms;
}

[data-theme="dark"]{
  --ink: #e9edf5;
  --ink-soft: #a9b4c6;
  --line: #223047;
  --line-soft: #1a2338;
  --surface: #0F172A;
  --surface-2: #0b1220;
  --surface-3: #16223a;
  --blue-50: #10233b;
  --shadow-color: 222deg 70% 3%;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

body{
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-0);
  color: var(--ink);
  background: var(--surface-2);
  -webkit-font-smoothing: antialiased;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
button{ font: inherit; }
ul{ list-style: none; margin: 0; padding: 0; }

h1,h2,h3,h4{
  font-family: var(--font-display);
  line-height: 1.12;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
  color: var(--ink);
}
h1{ font-size: var(--step-5); font-weight: 700; }
h2{ font-size: var(--step-3); font-weight: 700; }
h3{ font-size: var(--step-2); font-weight: 600; }
h4{ font-size: var(--step-1); font-weight: 600; }
p{ margin: 0 0 1em; color: var(--ink-soft); line-height: 1.65; }

.mono{ font-family: var(--font-mono); letter-spacing: 0.01em; }
.eyebrow{
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  display: inline-flex; align-items: center; gap: 8px;
}
[data-theme="dark"] .eyebrow{ color: #6fb3ff; }

/* focus visibility (accessibility floor) */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, [tabindex]:focus-visible{
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 4px;
}

.container{ max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.visually-hidden{ position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }

::selection{ background: var(--orange); color: var(--navy); }

/* Scrollbar (webkit) */
::-webkit-scrollbar{ width: 10px; height: 10px; }
::-webkit-scrollbar-thumb{ background: var(--line); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover{ background: var(--ink-soft); }

/* Utility spacing/layout */
.flex{ display: flex; }
.grid{ display: grid; }
.gap-1{ gap: 8px; } .gap-2{ gap: 16px; } .gap-3{ gap: 24px; } .gap-4{ gap: 32px; }
.center{ align-items: center; justify-content: center; }
.between{ align-items: center; justify-content: space-between; }
.text-center{ text-align: center; }
.mt-0{ margin-top: 0; }

/* Reveal-on-scroll (respects reduced motion via base rule above) */
.reveal{ opacity: 0; transform: translateY(16px); transition: opacity 640ms var(--ease), transform 640ms var(--ease); }
.reveal.is-visible{ opacity: 1; transform: translateY(0); }

/* Skip link */
.skip-link{
  position:absolute; left:12px; top:-48px; background: var(--navy); color:#fff;
  padding:10px 16px; border-radius:8px; z-index:200; transition: top var(--dur-fast);
  font-size: var(--step--1); font-weight:600;
}
.skip-link:focus{ top:12px; }