/* base.css — reset, typography, layout primitives. No color literals here. */

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

html {
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1, h2, h3, p {
  margin: 0;
}

.numeric {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.mono {
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, "Roboto Mono", monospace;
}

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

.skip-link {
  position: absolute;
  top: -48px;
  left: var(--space-4);
  z-index: 200;
  background: var(--surface-raised);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  transition: top var(--dur-fast) var(--ease-out);
}

.skip-link:focus {
  top: var(--space-4);
}

:focus-visible {
  outline: 2px solid var(--accent-dim);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-7);
  }
}

section {
  position: relative;
  padding-block: var(--space-9);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-8);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

h1 {
  font-size: clamp(2.25rem, 1.6rem + 3.2vw, 4rem);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--text);
}

h2 {
  font-size: clamp(1.75rem, 1.4rem + 1.6vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.12;
  color: var(--text);
  margin-top: var(--space-3);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
}

.lede {
  font-size: clamp(1rem, 0.94rem + 0.3vw, 1.15rem);
  color: var(--text-muted);
  max-width: 56em;
  margin-top: var(--space-4);
}

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