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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Бумажная фактура: едва заметное зерно, как на офсетной печати */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 0.94;
  letter-spacing: var(--track-tight);
}

p, ul, ol { margin: 0; }

:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 2px;
}

::selection {
  background: var(--signal);
  color: var(--signal-ink);
}

.shell {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--rule);
}

.rule--heavy { height: 3px; background: var(--ink); }

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

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  z-index: 300;
  padding: 0.7rem 1.2rem;
  background: var(--signal);
  color: var(--signal-ink);
  font-weight: 600;
  transition: top var(--duration-fast) var(--ease);
}

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

.reveal {
  opacity: 0;
  transform: translate3d(0, 18px, 0);
  transition:
    opacity var(--duration-slow) var(--ease-expo),
    transform var(--duration-slow) var(--ease-expo);
}

.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .reveal { opacity: 1; transform: none; }
}