/* base.css — сброс и дефолты элементов. Никаких компонентов и утилит. */

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

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

@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;
  }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1 0 auto; }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-4);
  line-height: var(--leading-tight);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
  text-wrap: balance;
}

h1 { font-size: var(--text-3xl); letter-spacing: -0.02em; }
h2 { font-size: var(--text-2xl); letter-spacing: -0.01em; }
h3 { font-size: var(--text-xl); }

@media (min-width: 768px) {
  h1 { font-size: var(--text-4xl); }
}

p, ul, ol { margin: 0 0 var(--space-4); }
p { max-width: 68ch; text-wrap: pretty; }

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color var(--transition-fast);
}

a:hover { color: var(--color-accent-hover); }

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

img, svg, video { max-width: 100%; height: auto; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-6) 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: calc(var(--space-2) * -10);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus { top: var(--space-2); }

.svg-sprite-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}