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

html {
  scroll-behavior: smooth;
  /* the sticky nav must not cover the heading we jump to */
  scroll-padding-top: 96px;
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: clip;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  text-wrap: pretty;
  -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(1100px 680px at 84% -180px, color-mix(in srgb, var(--color-accent-900) 80%, transparent), transparent 62%),
    radial-gradient(900px 700px at -8% 105%, color-mix(in srgb, black 34%, transparent), transparent 58%),
    var(--color-bg);
  background-attachment: fixed;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  letter-spacing: -0.015em;
}

p {
  margin: 0;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  color: var(--color-accent-300);
}

::selection {
  background: color-mix(in srgb, var(--color-accent) 30%, transparent);
}

/* Keyboard users keep a visible ring; pointer clicks do not draw one */
:focus-visible {
  outline: 2px solid var(--color-accent-300);
  outline-offset: 3px;
  border-radius: 8px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 18px;
  border-radius: 999px;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--glass-border);
  transform: translateY(-180%);
  transition: transform 200ms var(--ease-out);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* ── Layout primitives ─────────────────────────────────────────── */

.page {
  position: relative;
  z-index: 1;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-top: clamp(64px, 10vh, 104px);
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.section-title {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.15;
}

.eyebrow {
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* ── Glass surface ─────────────────────────────────────────────── */

.glass {
  background: var(--glass-fill);
  backdrop-filter: blur(var(--blur)) saturate(170%);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(170%);
  border: 1px solid var(--glass-border);
  box-shadow:
    var(--glass-hairline),
    0 18px 44px color-mix(in srgb, black 34%, transparent);
}

/* ── Scroll reveal ─────────────────────────────────────────────── */

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity var(--reveal-duration) ease,
    transform var(--reveal-duration) var(--ease-out);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Nothing may stay invisible if JS never runs */
.no-js [data-reveal] {
  opacity: 1;
  transform: none;
}

/* Cursor-following accent glow — enabled by JS on fine pointers only */
.glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 560px;
  height: 560px;
  margin: -280px 0 0 -280px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  opacity: 0;
  mix-blend-mode: screen;
  filter: blur(24px);
  background: radial-gradient(circle, color-mix(in srgb, var(--color-accent) 34%, transparent), transparent 62%);
  transition: opacity 400ms ease;
}

.glow.is-active {
  opacity: 0.5;
}

/* ── Footer ───────────────────────────────────────────────────── */

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 8px;
  padding-bottom: 56px;
  font-size: 13px;
  color: color-mix(in srgb, var(--color-text) 52%, transparent);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .glow {
    display: none;
  }
}