*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100dvh;
  font: 400 var(--fs-md)/var(--lh) var(--font);
  color: var(--text); background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color var(--t-theme) ease, color var(--t-theme) ease;
}
img, svg, video, canvas { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; }
h1, h2, h3 { line-height: var(--lh-tight); margin: 0; font-weight: 600; letter-spacing: -.01em; }
h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-lg); }
h3 { font-size: var(--fs-md); }
p { margin: 0; }
a { color: var(--accent); text-underline-offset: 2px; }
code, kbd { font-family: var(--font-mono); font-size: .9em; background: var(--code-bg); border-radius: 6px; padding: .1em .4em; }
[hidden] { display: none !important; }

.icon { width: 20px; height: 20px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
.icon--lg { width: 28px; height: 28px; }
.icon--sm { width: 16px; height: 16px; }

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

:focus { outline: none; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; box-shadow: 0 0 0 6px var(--focus-halo); }

.skip-link {
  position: fixed; top: var(--s2); left: var(--s2); z-index: 100;
  padding: var(--s2) var(--s4); border-radius: var(--r-pill);
  background: var(--accent); color: var(--on-accent); text-decoration: none; font-weight: 600;
  transform: translateY(-200%);
}
.skip-link:focus-visible { transform: none; }

/* ---------- живой фон ---------- */
.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; background: var(--bg); transition: background-color var(--t-theme) ease; pointer-events: none; }
.blob {
  position: absolute; width: 70vmax; height: 70vmax; border-radius: 50%;
  opacity: var(--blob-opacity); will-change: transform;
  transition: opacity var(--t-theme) ease;
}
.blob--1 { background: radial-gradient(closest-side, var(--blob-1), transparent); top: -30vmax; left: -20vmax; animation: drift-1 46s ease-in-out infinite alternate; }
.blob--2 { background: radial-gradient(closest-side, var(--blob-2), transparent); top: -10vmax; right: -30vmax; animation: drift-2 54s ease-in-out infinite alternate; }
.blob--3 { background: radial-gradient(closest-side, var(--blob-3), transparent); bottom: -35vmax; left: 0; animation: drift-3 60s ease-in-out infinite alternate; }
.blob--4 { background: radial-gradient(closest-side, var(--blob-4), transparent); bottom: -25vmax; right: -15vmax; animation: drift-4 50s ease-in-out infinite alternate; }
@keyframes drift-1 { to { transform: translate(18vw, 22vh) scale(1.15); } }
@keyframes drift-2 { to { transform: translate(-22vw, 18vh) scale(.9); } }
@keyframes drift-3 { to { transform: translate(20vw, -18vh) scale(1.1); } }
@keyframes drift-4 { to { transform: translate(-16vw, -24vh) scale(1.2); } }
@media (max-width: 600px) { .blob--4 { display: none; } }

/* ---------- раскладка ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: var(--s3);
  padding: var(--s3) var(--s4); padding-top: max(var(--s3), env(safe-area-inset-top));
  max-width: 1120px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: var(--s2); font-weight: 600; font-size: var(--fs-lg); letter-spacing: -.01em; white-space: nowrap; }
.brand__mark { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 12px; color: var(--on-accent); background: linear-gradient(135deg, var(--fam-top), var(--accent)); box-shadow: inset 0 1px 0 rgba(255,255,255,.4); }
.brand__mark .icon { width: 20px; height: 20px; }
.top-actions { display: flex; align-items: center; gap: var(--s2); }

main { max-width: 960px; margin: 0 auto; padding: var(--s4) var(--s4) calc(var(--s7) + 72px); }
.view { display: grid; gap: var(--s4); }
.view__head { display: grid; gap: var(--s1); padding: var(--s2) var(--s1) var(--s1); }
.view__title { font-size: var(--fs-2xl); }
.view__lead { color: var(--text-2); max-width: 60ch; }

.stack { display: grid; gap: var(--s3); }
.row { display: flex; flex-wrap: wrap; gap: var(--s2); align-items: center; }
.muted { color: var(--text-2); }
.small { font-size: var(--fs-sm); }

@media (max-width: 420px) {
  .brand__name { display: none; }
  .view__title { font-size: var(--fs-xl); }
}

::view-transition-old(root), ::view-transition-new(root) { animation-duration: 300ms; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; scroll-behavior: auto !important; }
  .blob { animation: none !important; }
}
@media (forced-colors: active) {
  .bg { display: none; }
}