/* Base: reset, typography, 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) + 16px);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

h1,
h2,
h3,
h4,
p,
ul,
ol,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

:where(ul[role="list"], ol[role="list"]) {
  list-style: none;
  padding: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: var(--lh-snug);
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

a {
  color: var(--c-accent-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--c-text);
}

strong {
  color: var(--c-text);
  font-weight: 600;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

::selection {
  background: rgba(90, 169, 255, 0.35);
  color: #fff;
}

/* Focus */
:focus {
  outline: none;
}

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

/* Skip link */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--c-text);
  color: var(--c-bg);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 0.75rem;
}

.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;
}

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

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

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

.section + .section {
  border-top: 1px solid var(--c-line);
}

/* Type helpers */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-accent-strong);
}

.eyebrow::before {
  content: "";
  width: 1.5em;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.eyebrow--teal {
  color: var(--c-teal);
}

.display {
  font-size: var(--fs-3xl);
  line-height: 0.95;
  letter-spacing: -0.01em;
  font-weight: 700;
  text-transform: uppercase;
}

.h2 {
  font-size: var(--fs-2xl);
  line-height: 0.98;
  letter-spacing: -0.005em;
  text-transform: uppercase;
}

.h3 {
  font-size: var(--fs-lg);
}

.lead {
  font-size: var(--fs-md);
  color: var(--c-text-2);
  max-width: 62ch;
}

.muted {
  color: var(--c-text-3);
}

.section-head {
  display: grid;
  gap: var(--space-4);
  margin-bottom: clamp(2.5rem, 2rem + 3vw, 4.5rem);
  max-width: 820px;
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
  justify-items: center;
}

.grad-text {
  background: linear-gradient(100deg, var(--c-text) 30%, var(--c-accent-strong) 75%, var(--c-teal));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Reveal (progressive enhancement: only hidden when JS has flagged support) */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}

.js .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;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}