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

html {
  min-width: 320px;
  scroll-behavior: smooth;
  background: var(--lab-bg);
  font-family: var(--lab-font-sans);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

body { min-width: 320px; min-height: 100vh; margin: 0; color: var(--lab-ink); background: var(--lab-bg); }
a { color: inherit; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img, svg { max-width: 100%; }

button:focus-visible, a:focus-visible, input:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--lab-signal);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 8px 12px;
  color: var(--lab-bg);
  background: var(--lab-ink);
  transform: translateY(-150%);
}
.skip-link:focus { transform: none; }
.sr-only {
  position: absolute !important;
  overflow: hidden;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  border-bottom: 1px solid var(--lab-line);
  background: var(--lab-header);
  backdrop-filter: blur(14px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  width: min(calc(100% - 48px), var(--lab-wide));
  height: 64px;
  margin: auto;
}

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.brand__mark { position: relative; width: 22px; height: 22px; border: 1px solid var(--lab-ink); }
.brand__mark::before,
.brand__mark::after { content: ""; position: absolute; background: var(--lab-accent); }
.brand__mark::before { top: 4px; bottom: 4px; left: 7px; width: 1px; }
.brand__mark::after { top: 10px; right: 4px; left: 4px; height: 1px; }
.brand__mark i { position: absolute; right: 3px; bottom: 3px; width: 4px; height: 4px; background: var(--lab-signal); }
.brand strong { display: block; font-size: 13px; font-weight: 680; letter-spacing: .02em; }
.brand small { display: block; margin-top: 1px; color: var(--lab-muted); font: 9px var(--lab-font-mono); letter-spacing: .1em; text-transform: uppercase; }

.site-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.site-nav a { color: var(--lab-muted); font-size: 12px; text-decoration: none; }
.site-nav a:hover { color: var(--lab-ink); }

.header-actions { display: flex; align-items: center; gap: 3px; margin-left: 28px; }
.icon-button {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  padding: 0;
  color: var(--lab-muted);
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}
.icon-button:hover { color: var(--lab-ink); background: var(--lab-surface); }
.icon-button svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.menu-button { display: none; }
.mode-icon--sun { display: none; }
:root[data-theme="dark"] .mode-icon--moon { display: none; }
:root[data-theme="dark"] .mode-icon--sun { display: block; }

.site-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  width: min(calc(100% - 48px), var(--lab-wide));
  margin: 82px auto 0;
  padding: 25px 0 38px;
  color: var(--lab-faint);
  font: 10px/1.6 var(--lab-font-mono);
  border-top: 1px solid var(--lab-line);
}
.site-footer p { margin: 0; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--lab-ink); }

.mono-label { color: var(--lab-accent); font: 10px var(--lab-font-mono); letter-spacing: .13em; text-transform: uppercase; }

@media (max-width: 720px) {
  .site-header__inner { width: calc(100% - 32px); height: 56px; }
  .site-nav {
    display: none;
    position: absolute;
    top: 56px;
    right: 0;
    left: 0;
    padding: 18px 20px;
    border-bottom: 1px solid var(--lab-line);
    background: var(--lab-bg);
  }
  .site-nav.is-open { display: grid; gap: 18px; }
  .header-actions { margin-left: auto; }
  .menu-button { display: inline-grid; }
  .site-footer { display: block; width: calc(100% - 32px); margin-top: 54px; }
  .site-footer p + p { margin-top: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}