/* ============================================================
   Base Industries — main.css
   Layer 1: design tokens, base/reset, layout primitives, header.
   Components live in components.css, motion in animations.css,
   breakpoints in responsive.css.
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --color-base: #ffffff;
  --color-surface: #f3f6fa;
  --color-surface-2: #eef2f8;
  --color-text: #2a3442;
  --color-text-soft: #56637a;
  --color-dark: #0d1730;
  --color-dark-2: #0b1230;
  --color-ink: #080f26;
  --color-primary: #0b2fd8;
  --color-primary-2: #0f41ff;
  --color-accent: #89c857;
  --color-accent-2: #a6d97a;
  --color-border: #d5dbe5;

  --font-display: "Sora", "Segoe UI", sans-serif;
  --font-body: "Manrope", "Segoe UI", sans-serif;

  --fz-hero: clamp(3.4rem, 6.4vw + 1.4rem, 8.75rem);
  --fz-page-hero: clamp(2.6rem, 5vw + 1rem, 5.5rem);
  --fz-display: clamp(3.2rem, 9vw, 8rem);
  --fz-h2: clamp(2.1rem, 3.4vw + 0.8rem, 4.25rem);
  --fz-h3: clamp(1.3rem, 1.2vw + 0.9rem, 1.8rem);
  --fz-lead: clamp(1.05rem, 0.7vw + 0.9rem, 1.4rem);
  --fz-body: 1rem;
  --fz-small: 0.9rem;
  /* Metric-aware stat type — sized by value length so long numbers (80,000+) never collide with neighbours. */
  --fz-stat-short: clamp(4.5rem, 9vw, 9.5rem);
  --fz-stat-medium: clamp(3.75rem, 7.2vw, 7.75rem);
  --fz-stat-long: clamp(3.25rem, 5.8vw, 6.25rem);
  --fz-index: clamp(0.7rem, 0.5vw + 0.6rem, 0.85rem);

  --lh-tight: 1.04;
  --lh-heading: 1.12;
  --lh-body: 1.65;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 1.875rem;
  --space-8: 2.5rem;
  --space-9: 3.75rem;
  --space-10: 5.5rem;
  --space-11: 7.5rem;

  --container-max: 1680px;
  --container-pad: clamp(1.25rem, 3.2vw, 4rem);

  --radius-sm: 0.5rem;
  --radius-md: 0.9rem;
  --radius-lg: 1.4rem;

  --shadow-soft: 0 12px 40px rgba(11, 23, 48, 0.08);
  --shadow-card: 0 20px 50px rgba(7, 18, 45, 0.13);

  --dur-fast: 180ms;
  --dur-base: 340ms;
  --dur-slow: 640ms;
  --dur-cine: 1100ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-io: cubic-bezier(0.65, 0, 0.35, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fz-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-base);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.nav-open { overflow: hidden; }

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

a { color: var(--color-primary); text-decoration: none; transition: color var(--dur-base) var(--ease-out); }
a:hover { color: var(--color-primary-2); }

h1, h2, h3, h4 {
  margin: 0 0 var(--space-5);
  font-family: var(--font-display);
  line-height: var(--lh-heading);
  color: inherit;
  text-wrap: balance;
  font-weight: 700;
}
h1 { font-size: var(--fz-hero); line-height: var(--lh-tight); letter-spacing: -0.03em; }
h2 { font-size: var(--fz-h2); letter-spacing: -0.02em; }
h3 { font-size: var(--fz-h3); }

p { margin: 0 0 var(--space-5); color: var(--color-text-soft); }

:focus-visible { outline: 3px solid var(--color-accent-2); outline-offset: 3px; border-radius: 2px; }

.skip-link {
  position: absolute; left: 0; top: -60px; background: var(--color-primary); color: #fff;
  padding: 0.75rem 1rem; z-index: 999; transition: top var(--dur-base) var(--ease-out);
}
.skip-link:focus-visible { top: 0.5rem; }

.container { width: min(100% - 2 * var(--container-pad), var(--container-max)); margin-inline: auto; position: relative; }

.section { padding-block: var(--space-10); position: relative; }
.section-soft { background: linear-gradient(180deg, #f6f9fd 0%, #f1f5fb 100%); }
.section-dark { color: #fff; background: linear-gradient(140deg, var(--color-dark) 0%, var(--color-dark-2) 62%, #12285e 100%); }
.section-dark p { color: rgba(255,255,255,0.86); }

.eyebrow {
  font-size: 0.82rem; letter-spacing: 0.18em; text-transform: uppercase; font-weight: 700;
  margin: 0 0 var(--space-5); color: var(--color-primary);
}
.eyebrow--light { color: var(--color-accent); }

.lead { font-size: var(--fz-lead); max-width: 56ch; }

.section-head { max-width: 70ch; margin-bottom: var(--space-9); }
.section-head__sub { margin-top: var(--space-4); max-width: 60ch; }
/* Opt-in: oversized display statements whose longest word exceeds the 70ch
   body-copy cap (e.g. "everywhere") get full container width. Applied only
   where needed so the approved homepage layout is untouched. */
.section-head--wide { max-width: none; }

/* ---------- Brand system: recurring visual language ---------- */
/* Oversized editorial display heading */
.display { font-size: var(--fz-display); line-height: 0.98; letter-spacing: -0.035em; font-weight: 800; margin: 0 0 var(--space-6); }
.display--accent { color: var(--color-accent); }

/* Section index label — small technical coordinate, top-right of a section */
.sec-index {
  position: absolute; top: calc(var(--space-9) * -0.4); right: 0;
  font-family: var(--font-display); font-size: var(--fz-index); font-weight: 700;
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--color-text-soft);
  display: inline-flex; align-items: center; gap: 0.6rem;
}
.sec-index::before { content: ""; width: 2.2rem; height: 1px; background: currentColor; opacity: 0.5; }
.section-dark .sec-index { color: rgba(255,255,255,0.5); }

/* Engineering grid texture — very subtle, discovered subconsciously */
.grid-texture { position: relative; }
.grid-texture::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image: linear-gradient(rgba(11,47,216,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(11,47,216,0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(120% 90% at 80% 0%, #000 0%, transparent 70%);
  mask-image: radial-gradient(120% 90% at 80% 0%, #000 0%, transparent 70%);
}
.section-dark.grid-texture::before {
  background-image: linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
}
.grid-texture > * { position: relative; z-index: 1; }

/* Technical divider — thin rule with a node */
.tech-rule { position: relative; height: 1px; background: var(--color-border); margin: 0; }
.tech-rule::before { content: ""; position: absolute; left: 0; top: -3px; width: 7px; height: 7px; border-radius: 50%; background: var(--color-accent); }
.section-dark .tech-rule { background: rgba(255,255,255,0.16); }

/* Vertical side label (rotated) */
.vlabel { writing-mode: vertical-rl; transform: rotate(180deg); font-size: var(--fz-index); letter-spacing: 0.28em; text-transform: uppercase; font-weight: 700; color: var(--color-text-soft); white-space: nowrap; }
.section-dark .vlabel { color: rgba(255,255,255,0.5); }

/* Film grain overlay (subtle) */
.grain::after {
  content: ""; position: absolute; inset: 0; z-index: 2; pointer-events: none; opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; width: 100%; z-index: 100;
  background: rgba(8,15,38,0);
  transition: background-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), backdrop-filter var(--dur-base) var(--ease-out);
}
.site-header.is-scrolled, .site-header--solid {
  background: rgba(8,15,38,0.92);
  backdrop-filter: saturate(180%) blur(10px);
  box-shadow: 0 10px 30px rgba(4,10,28,0.35);
}
/* Top scrim so white nav text stays legible over bright hero imagery. */
.site-header:not(.site-header--solid)::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(8,15,38,0.85) 0%, rgba(8,15,38,0.45) 55%, rgba(8,15,38,0) 100%);
  transition: opacity var(--dur-base) var(--ease-out);
}
.site-header.is-scrolled:not(.site-header--solid)::before { opacity: 0; }

.top-strip { border-bottom: 1px solid rgba(255,255,255,0.1); background: #060c1e; color: rgba(255,255,255,0.82); }
.top-strip__inner { min-height: 2.5rem; display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); font-size: var(--fz-small); }
.top-strip p { margin: 0; color: inherit; }
.top-strip a { color: var(--color-accent); font-weight: 700; }

.header-bar { min-height: 5rem; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: var(--space-7); }

.brand { display: inline-flex; align-items: center; }
.brand__logo { height: 2.15rem; width: auto; display: block; }

.header-actions { display: flex; align-items: center; gap: 0.75rem; }

.menu-btn {
  display: none; width: 2.9rem; height: 2.9rem; padding: 0; position: relative;
  border: 1px solid rgba(255,255,255,0.24); background: rgba(255,255,255,0.03); border-radius: 999px; cursor: pointer;
}
.menu-btn span { position: absolute; left: 0.7rem; right: 0.7rem; height: 2px; background: #fff; transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out), top var(--dur-base) var(--ease-out); }
.menu-btn span:nth-child(1) { top: 0.95rem; }
.menu-btn span:nth-child(2) { top: 1.4rem; }
.menu-btn span:nth-child(3) { top: 1.85rem; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { top: 1.4rem; transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { top: 1.4rem; transform: rotate(-45deg); }

.mobile-nav { position: fixed; inset: 0; z-index: 110; background: rgba(4,9,23,0.7); backdrop-filter: blur(4px); }
.mobile-nav__panel { margin-left: auto; width: min(88vw, 380px); min-height: 100%; background: linear-gradient(160deg, #111f46 0%, #0d1734 100%); padding: 6rem 1.75rem 2rem; display: flex; flex-direction: column; }
.mobile-nav__list { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.15rem; }
.mobile-nav__list a { display: block; color: #fff; font-size: 1.35rem; font-family: var(--font-display); font-weight: 600; padding: 0.85rem 0; border-bottom: 1px solid rgba(255,255,255,0.08); }
.mobile-nav__foot { margin-top: auto; display: grid; gap: var(--space-3); padding-top: var(--space-6); border-top: 1px solid rgba(255,255,255,0.12); }
.mobile-nav__foot a { color: var(--color-accent); font-weight: 700; font-size: 1.05rem; }

/* ---------- Inner page hero (premium, configurable) ---------- */
.page-hero { position: relative; overflow: clip; color: #fff; }
.page-hero__media { position: absolute; inset: 0; z-index: 0; }
.page-hero__media img { position: absolute; inset: -8% 0; width: 100%; height: 116%; object-fit: cover; will-change: transform; }
.page-hero__scrim { position: absolute; inset: 0; z-index: 0; background:
  radial-gradient(120% 90% at 80% 20%, rgba(8,15,38,0) 0%, rgba(8,15,38,0.5) 100%),
  linear-gradient(90deg, rgba(8,15,38,0.96) 0%, rgba(8,15,38,0.72) 42%, rgba(8,15,38,0.28) 100%),
  linear-gradient(0deg, rgba(8,15,38,0.94) 0%, rgba(8,15,38,0.18) 58%); }
.page-hero__layout { position: relative; z-index: 1; padding-top: var(--space-11); padding-bottom: var(--space-10); min-height: 66vh; display: flex; align-items: center; }
.page-hero__content { max-width: 40rem; }
.page-hero__title { color: #fff; font-size: var(--fz-page-hero); letter-spacing: -0.03em; }
.page-hero__sub { color: rgba(255,255,255,0.88); font-size: var(--fz-lead); max-width: 48ch; }
.page-hero__meta { display: flex; flex-wrap: wrap; gap: var(--space-7); margin: var(--space-8) 0 0; padding: 0; }
.page-hero__meta div { display: flex; flex-direction: column; gap: 0.4rem; }
.page-hero__meta div::before { content: ""; width: 1.4rem; height: 1px; background: var(--color-accent); }
.page-hero__meta dt { font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: rgba(255,255,255,0.6); }
.page-hero__meta dd { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; color: #fff; }
/* Page index number — oversized technical label */
.page-hero__index { display: inline-block; font-family: var(--font-display); font-size: clamp(1rem, 1.4vw, 1.4rem); font-weight: 800; letter-spacing: 0.14em; color: var(--color-accent); margin-bottom: var(--space-5); }
.page-hero__index::after { content: ""; display: inline-block; width: 2.6rem; height: 1px; background: var(--color-accent); margin-left: 0.7rem; vertical-align: middle; }

/* Variant: split — text left, framed image right */
.page-hero--split { background: linear-gradient(180deg, #f6f9fd 0%, #eef3fa 100%); color: var(--color-text); }
.page-hero--split .page-hero__layout { min-height: auto; padding-top: calc(var(--space-11) + 2rem); padding-bottom: var(--space-10); gap: clamp(2rem, 5vw, 5rem); align-items: center; }
.page-hero--split .page-hero__content { max-width: 30rem; }
.page-hero--split .page-hero__title { color: var(--color-text); }
.page-hero--split .page-hero__sub { color: var(--color-text-soft); }
.page-hero--split .page-hero__index { color: var(--color-primary); }
.page-hero--split .page-hero__index::after { background: var(--color-primary); }
.page-hero--split .eyebrow--light { color: var(--color-primary); }
.page-hero--split .page-hero__meta { gap: var(--space-6); }
.page-hero--split .page-hero__meta div::before { background: var(--color-primary); }
.page-hero--split .page-hero__meta dt { color: var(--color-text-soft); }
.page-hero--split .page-hero__meta dd { color: var(--color-text); }
.page-hero__split-media { margin: 0; flex: 1 1 0; min-width: 0; border-radius: var(--radius-lg); overflow: clip; box-shadow: var(--shadow-soft); aspect-ratio: 4 / 3; }
.page-hero__split-media img { width: 100%; height: 100%; object-fit: cover; }

/* Variant: none — typographic, no image */
.page-hero--none { background: linear-gradient(140deg, var(--color-dark) 0%, var(--color-dark-2) 60%, #12285e 100%); }
.page-hero--none .page-hero__layout { min-height: 52vh; }
.page-hero--none .page-hero__content { max-width: 44rem; }