/* ============================================================
   TRIPLEFOUR — GLOBAL  (reset · base · utilities · motion engine)
   Loaded after tokens.css, before section styles.
   ============================================================ */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body.nav-open { overflow: hidden; }

img, svg, video, canvas { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
ul, ol { list-style: none; }
::selection { background: var(--accent); color: var(--text-on-accent); }

/* ---------- Scrollbar ---------- */
html { scrollbar-width: thin; scrollbar-color: var(--surface-3) var(--bg); }
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 999px; border: 3px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--surface-4); }

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-family: var(--font-sans); font-weight: 700; line-height: 1.04; letter-spacing: -0.02em; }
.display, .u-display { font-family: var(--font-display); font-weight: 400; line-height: 0.92; letter-spacing: 0.005em; text-transform: uppercase; }
p { color: var(--text-dim); }
strong { color: var(--text); font-weight: 600; }
.accent { color: var(--accent-bright); }

/* Eyebrow / mono label used at the top of every section */
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.eyebrow::before {
  content: ""; width: 26px; height: 1px; background: var(--accent); display: inline-block;
}
.eyebrow--num { color: var(--accent-bright); }

/* ---------- Layout helpers ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.container--wide { max-width: var(--container-wide); }
.section { position: relative; padding-block: var(--section-y); }
/* offset in-page anchor landing so the fixed header never covers section tops
   (covers native hash navigation, external deep-links, and the skip link) */
:where(section, footer, main)[id] { scroll-margin-top: calc(var(--header-h) + 8px); }
.section--tight { padding-block: var(--section-y-sm); }
.section__head { max-width: 60ch; margin-bottom: clamp(2.5rem, 5vw, 4.5rem); }
.section__index {
  font-family: var(--font-mono); font-size: var(--fs-small); color: var(--accent-bright);
  letter-spacing: 0.1em; margin-bottom: var(--space-4);
}

/* Hairline divider between bands */
.rule { height: 1px; background: var(--line); border: 0; width: 100%; }

/* ---------- Buttons ---------- */
.btn {
  --_bg: var(--accent); --_fg: var(--text-on-accent);
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 0.6em;
  font-family: var(--font-sans); font-weight: 600; font-size: 0.95rem; letter-spacing: 0.01em;
  padding: 0.95em 1.6em; border-radius: var(--r-pill);
  background: var(--_bg); color: var(--_fg);
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
  will-change: transform; white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-accent); background: var(--accent-bright); }
.btn:active { transform: translateY(0); }
.btn .btn__arrow { transition: transform var(--dur-fast) var(--ease-out); }
.btn:hover .btn__arrow { transform: translate(3px, -3px); }
.btn--ghost { --_bg: transparent; --_fg: var(--text); border: 1px solid var(--line-strong); }
.btn--ghost:hover { background: var(--surface-2); box-shadow: none; border-color: var(--accent-line); }
.btn--lg { font-size: 1.05rem; padding: 1.1em 2em; }

/* Text link with animated underline */
.link {
  position: relative; color: var(--text); font-weight: 500; display: inline-flex; align-items: center; gap: 0.4em;
}
.link::after {
  content: ""; position: absolute; left: 0; bottom: -3px; height: 1.5px; width: 100%;
  background: var(--accent); transform: scaleX(0); transform-origin: right; transition: transform var(--dur) var(--ease-out);
}
.link:hover::after { transform: scaleX(1); transform-origin: left; }

/* Chip / tag */
.chip {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono); font-size: var(--fs-label); letter-spacing: 0.06em;
  color: var(--text-dim); background: var(--surface); border: 1px solid var(--line);
  padding: 0.5em 0.9em; border-radius: var(--r-pill);
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.chip:hover { border-color: var(--accent-line); color: var(--text); }

/* ---------- Ambient glow blob (decorative) ---------- */
.glow {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5;
  pointer-events: none; z-index: 0;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
}

/* ---------- Reveal / scroll-motion engine ----------
   Add data-reveal to any element. Optional data-reveal="up|left|right|scale|fade".
   Optional inline style: --reveal-delay: 120ms; stagger children with data-reveal-stagger. */
[data-reveal] {
  opacity: 0;
  transform: translateY(34px);
  transition:
    opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal="left"]  { transform: translateX(-44px); }
[data-reveal="right"] { transform: translateX(44px); }
[data-reveal="scale"] { transform: scale(0.92); }
[data-reveal="fade"]  { transform: none; }
[data-reveal].is-in { opacity: 1; transform: none; }

/* Clip-reveal for big headlines (line wipes up) */
.reveal-mask { overflow: hidden; }
.reveal-mask > * { transform: translateY(110%); transition: transform 0.9s var(--ease-out); transition-delay: var(--reveal-delay, 0ms); }
.reveal-mask.is-in > * { transform: translateY(0); }

/* ---------- Marquee (used by hero ticker, industries) ---------- */
.marquee { display: flex; overflow: hidden; width: 100%; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee__track { display: flex; flex-shrink: 0; gap: var(--marquee-gap, 3rem); align-items: center; padding-right: var(--marquee-gap, 3rem); animation: marquee var(--marquee-dur, 36s) linear infinite; }
.marquee--reverse .marquee__track { animation-direction: reverse; }
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-100%); } }

/* ---------- Accessibility ---------- */
:where(a, button, input, textarea, select, [tabindex]):focus-visible {
  outline: 2px solid var(--accent-bright); outline-offset: 3px; border-radius: 4px;
}
.skip-link {
  position: absolute; left: 50%; top: -100px; transform: translateX(-50%);
  background: var(--accent); color: var(--text-on-accent); padding: 0.7em 1.2em; border-radius: var(--r-sm);
  z-index: var(--z-overlay); font-weight: 600; transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: 12px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- Reduced motion: disable all the fancy bits ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal], .reveal-mask > * { opacity: 1 !important; transform: none !important; }
  .marquee__track { animation: none !important; }
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mx-auto { margin-inline: auto; }
.maxw-prose { max-width: 62ch; }
.grid { display: grid; gap: var(--grid-gap, var(--space-6)); }
.flex { display: flex; }
.hidden { display: none !important; }
@media (max-width: 640px) { .hide-mobile { display: none !important; } }
@media (min-width: 641px) { .only-mobile { display: none !important; } }