/* Reset, typography, and layout primitives. */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1.5rem);
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: clip;
  background-color: var(--bg);
  background-image: radial-gradient(1200px 640px at 50% -240px, rgb(59 130 246 / 0.12), transparent 70%);
  background-repeat: no-repeat;
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); letter-spacing: -0.015em; }
h4 { font-size: var(--fs-h4); letter-spacing: -0.01em; }

p {
  margin: 0;
  text-wrap: pretty;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

dl,
dd,
figure,
blockquote {
  margin: 0;
}

a {
  color: inherit;
  text-decoration-color: rgb(96 165 250 / 0.5);
  text-underline-offset: 0.2em;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

::selection {
  background: rgb(59 130 246 / 0.35);
  color: #fff;
}

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

h1:focus,
main:focus {
  outline: none;
}

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.625rem 1rem;
  border-radius: var(--radius);
  background: var(--surface-3);
  color: var(--text);
  font-weight: 500;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--dur) var(--ease-out);
}

.skip-link:focus {
  transform: none;
}

.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;
}

/* Layout */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: calc(800px + var(--gutter) * 2);
}

.section {
  position: relative;
  padding-block: var(--section-y);
}

.section--tight {
  padding-block: calc(var(--section-y) * 0.6);
}

.section--flush-top {
  padding-top: 0;
}

.section--band {
  background: linear-gradient(180deg, rgb(13 20 36 / 0.7), rgb(13 20 36 / 0.25));
  border-block: 1px solid var(--border);
}

.grid {
  display: grid;
  gap: clamp(1rem, 0.75rem + 1vw, 1.5rem);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 18rem), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 14rem), 1fr)); }

/* Typography helpers */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan));
}

.lead {
  color: var(--text-muted);
  font-size: var(--fs-xl);
  line-height: 1.6;
}

.muted {
  color: var(--text-muted);
}

.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

/* Scroll reveal: content stays visible when scripting is off or motion is reduced. */
@media (scripting: enabled) and (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(20px);
    transition:
      opacity var(--dur-slow) var(--ease-out),
      transform var(--dur-slow) var(--ease-out);
    transition-delay: calc(var(--reveal-delay, 0) * 80ms);
  }

  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}

@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;
  }
}

/* Scrollbar */
html {
  scrollbar-color: var(--surface-3) var(--bg);
}