/* ============================================================================
   IICONIX — Base: reset, typography, layout primitives
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Ambient page glow — a single restrained radial at the top of the page. */
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto 0;
  height: 90vh;
  background: var(--grad-radial);
  pointer-events: none;
  z-index: 0;
  opacity: 0.9;
}

img, svg, video, canvas { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
ul, ol { list-style: none; padding: 0; }

/* --- Type -------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-snug);
  letter-spacing: -0.02em;
  color: var(--text-strong);
}
h1 { font-size: var(--fs-h1); line-height: var(--lh-tight); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p  { color: var(--muted); }

.lead { font-size: var(--fs-lead); color: var(--muted); line-height: 1.5; }

.text-gradient {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.accent { color: var(--cyan); }

/* --- Layout ------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 1;
}
.container--wide { max-width: var(--container-wide); }

.section { padding-block: var(--section-y); position: relative; }
.section--tight { padding-block: clamp(48px, 7vw, 90px); }

/* Hairline divider that reads as structure, not decoration. */
.rule {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
  border: 0;
}

/* Eyebrow — mono, uppercase, ties into the quantitative identity. */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cyan);
  opacity: 0.7;
}

.section-head { max-width: 720px; margin-bottom: clamp(40px, 6vw, 68px); }
.section-head h2 { margin-top: 16px; }
.section-head p { margin-top: 18px; }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head--center .eyebrow::before { display: none; }

/* Skip link for keyboard users. */
.skip-link {
  position: absolute;
  left: 16px; top: -60px;
  z-index: 200;
  background: var(--azure);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 16px; }

/* Visible focus everywhere. */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.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;
}

/* Honeypot: visually and semantically hidden, still submitted by bots. */
.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px; height: 1px;
  opacity: 0; pointer-events: none;
}

/* Utility spacing helpers used sparingly */
.mt-0 { margin-top: 0; }
.stack > * + * { margin-top: 1.1rem; }