/* ============================================================
   GROW LEVEL — Global / Reset / Layout primitives
   ============================================================ */

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

* { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--gl-nav-h) + 24px);
}

body {
  font-family: var(--gl-font-sans);
  font-size: var(--gl-fs-base);
  line-height: var(--gl-lh-base);
  color: var(--gl-text-soft);
  background: var(--gl-black);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

/* Ambient background: subtle grid + top halo, fixed */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(61,130,246,0.14), transparent 60%),
    radial-gradient(900px 500px at 85% 10%, rgba(34,211,238,0.07), transparent 55%),
    var(--gl-black);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(120% 80% at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(120% 80% at 50% 0%, #000 20%, transparent 75%);
  pointer-events: none;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }
ul { list-style: none; }

::selection { background: rgba(61,130,246,0.35); color: #fff; }

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5 {
  font-family: var(--gl-font-display);
  color: var(--gl-text);
  line-height: var(--gl-lh-snug);
  font-weight: 600;
  letter-spacing: -0.02em;
}
h1 { font-size: var(--gl-fs-5xl); line-height: var(--gl-lh-tight); letter-spacing: -0.035em; }
h2 { font-size: var(--gl-fs-4xl); letter-spacing: -0.03em; }
h3 { font-size: var(--gl-fs-2xl); }
h4 { font-size: var(--gl-fs-xl); }
p  { color: var(--gl-text-muted); }

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

/* ---------- Layout primitives ---------- */
.gl-container {
  width: 100%;
  max-width: var(--gl-container);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 5vw, 3.25rem);
}
.gl-container--wide { max-width: var(--gl-container-wide); }

.gl-section {
  position: relative;
  padding-block: clamp(4.5rem, 9vw, 8rem);
}
.gl-section--tight { padding-block: clamp(3rem, 6vw, 5rem); }

.gl-section-head {
  max-width: 660px;
  margin-bottom: var(--gl-sp-7);
}
.gl-section-head--center {
  margin-inline: auto;
  text-align: center;
}
.gl-section-head p {
  margin-top: var(--gl-sp-4);
  font-size: var(--gl-fs-lg);
  color: var(--gl-text-muted);
}

.gl-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--gl-sp-2);
  font-family: var(--gl-font-mono);
  font-size: var(--gl-fs-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gl-cyan-soft);
  margin-bottom: var(--gl-sp-4);
}
.gl-eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, var(--gl-cyan), transparent);
}
.gl-section-head--center .gl-eyebrow::before { display: none; }

/* Grid helpers */
.gl-grid { display: grid; gap: var(--gl-sp-5); }
.gl-grid-2 { grid-template-columns: repeat(2, 1fr); }
.gl-grid-3 { grid-template-columns: repeat(3, 1fr); }
.gl-grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Divider */
.gl-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gl-border-strong), transparent);
  border: 0;
}

/* Utility */
.gl-center { text-align: center; }
.gl-mono { font-family: var(--gl-font-mono); }
.gl-hidden { display: none !important; }
.gl-noscroll { overflow: hidden; }

/* Skip link (a11y) */
.gl-skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--gl-blue);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: var(--gl-z-toast);
}
.gl-skip:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--gl-blue-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Reveal-on-scroll base state (JS toggles .is-visible) */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity var(--gl-dur-slow) var(--gl-ease),
              transform var(--gl-dur-slow) var(--gl-ease);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}
[data-reveal-delay="1"] { transition-delay: 80ms; }
[data-reveal-delay="2"] { transition-delay: 160ms; }
[data-reveal-delay="3"] { transition-delay: 240ms; }
[data-reveal-delay="4"] { transition-delay: 320ms; }
[data-reveal-delay="5"] { transition-delay: 400ms; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ---------- Responsive layout ---------- */
@media (max-width: 960px) {
  .gl-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .gl-grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .gl-grid-2, .gl-grid-3, .gl-grid-4 { grid-template-columns: 1fr; }
  h1 { font-size: clamp(2.2rem, 10vw, 3rem); }
  h2 { font-size: var(--gl-fs-3xl); }
}