/* Reset и базовая типографика */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--dur) ease, color var(--dur) ease;
}

h1, h2, h3, h4 {
  margin: 0;
  line-height: var(--lh-tight);
  font-weight: 700;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-base); font-weight: 600; }

p { margin: 0; }
p + p { margin-block-start: var(--sp-4); }

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

a {
  color: var(--accent-text);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}
a:hover { color: var(--accent-strong); }

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

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

strong { font-weight: 600; }

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

::selection { background: var(--accent-soft); color: var(--text); }

.skip-link {
  position: absolute;
  inset-inline-start: var(--sp-4);
  inset-block-start: -100%;
  z-index: 100;
  padding: var(--sp-2) var(--sp-4);
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
}
.skip-link:focus { inset-block-start: var(--sp-4); }

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

/* Появление секций при скролле (JS добавляет .is-visible) */
.reveal {
  opacity: 0;
  translate: 0 18px;
  transition: opacity 600ms var(--ease), translate 600ms var(--ease);
}
.reveal.is-visible { opacity: 1; translate: 0 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  .reveal { opacity: 1; translate: none; }
}