/* ============================================================
   AI Speedforce — Base: reset, elements, typography, layout
   ============================================================ */
*, *::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; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--c-body);
  background: var(--c-surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
svg { fill: currentColor; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--c-ink);
  line-height: var(--lh-tight);
  font-weight: 700;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(2.25rem, 5vw, var(--fs-5xl)); }
h2 { font-size: clamp(1.75rem, 3.4vw, var(--fs-3xl)); line-height: var(--lh-snug); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }
p  { color: var(--c-body); }

a { color: var(--c-brand-700); text-decoration: none; }
a:hover { color: var(--c-brand-600); }

ul, ol { padding-left: 1.15em; }
li { margin-bottom: .35em; }

strong { color: var(--c-ink); font-weight: 650; }
small { font-size: var(--fs-sm); }
hr { border: 0; border-top: 1px solid var(--c-line); margin: var(--sp-6) 0; }

/* Focus — visible for keyboard users */
:focus-visible {
  outline: 3px solid var(--c-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: var(--sp-3);
  top: -60px;
  z-index: calc(var(--z-drawer) + 10);
  background: var(--c-ink);
  color: #fff;
  padding: .6rem 1rem;
  border-radius: var(--radius-sm);
  transition: top .15s ease;
}
.skip-link:focus { top: var(--sp-3); color: #fff; }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}
.container--narrow { max-width: var(--container-narrow); }

.section { padding-block: clamp(3rem, 7vw, var(--sp-9)); }
.section--tight { padding-block: clamp(2rem, 4vw, var(--sp-7)); }
.section--tint { background: var(--c-surface-2); }
.section--night {
  background: radial-gradient(120% 120% at 80% -10%, var(--c-night-2), var(--c-night) 60%);
  color: #cdd4ee;
}
.section--night h1, .section--night h2, .section--night h3 { color: #fff; }
.section--night p { color: #b7c0e0; }

.stack > * + * { margin-top: var(--sp-4); }
.stack-lg > * + * { margin-top: var(--sp-6); }

.grid { display: grid; gap: var(--sp-5); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.measure { max-width: 65ch; }
.center { text-align: center; margin-inline: auto; }
.text-muted { color: var(--c-muted); }
.eyebrow {
  font-family: var(--font-display);
  font-weight: 650;
  font-size: var(--fs-sm);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-brand-600);
}
.section--night .eyebrow { color: var(--c-accent-400); }
.lead { font-size: var(--fs-lg); color: var(--c-body); }
.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}