/**
 * Base styles — reset, typography, layout shell
 */

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

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  font-weight: var(--weight-regular);
  line-height: 1.65;
  color: var(--color-on-background);
  background-color: var(--color-background);
  text-rendering: optimizeLegibility;
}

body.is-no-js {
  /* JS снимает класс после init */
}

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

a {
  color: var(--color-secondary);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
  transition: color var(--motion-duration-fast) var(--motion-easing-standard);
}

a:hover,
a:focus-visible {
  color: var(--color-secondary-hover);
}

h1,
h2,
h3,
h4,
h5,
h6,
.display-xl,
.display-lg,
.headline-lg,
.headline-md {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-on-background);
  margin-top: 0;
}

h1,
.display-xl {
  font-size: var(--text-display-xl);
}

h2,
.display-lg {
  font-size: var(--text-display-lg);
}

h3,
.headline-lg {
  font-size: var(--text-headline-lg);
}

h4,
.headline-md {
  font-size: var(--text-headline-md);
}

h5,
h6,
.headline-sm {
  font-family: var(--font-body);
  font-size: var(--text-headline-sm);
  font-weight: var(--weight-bold);
  letter-spacing: -0.01em;
}

p {
  margin-top: 0;
  margin-bottom: 1em;
}

ul,
ol {
  padding-left: 1.25em;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: calc(var(--z-header) + 10);
  padding: 0.75rem 1rem;
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

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

.container {
  width: min(100% - 2 * var(--space-gutter), var(--container-max));
  margin-inline: auto;
}

.container--narrow {
  width: min(100% - 2 * var(--space-gutter), var(--container-narrow));
}

.container--wide {
  width: min(100% - 2 * var(--space-gutter), var(--container-wide));
}

.section {
  padding-block: var(--space-section-y);
}

.section--surface {
  background-color: var(--color-surface-lowest);
}

.section--beige {
  background-color: var(--color-surface-container);
}

.site-main {
  flex: 1 0 auto;
}

.site-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.eyebrow {
  font-size: var(--text-label-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-secondary);
}

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

/* Motion initial state — no-JS safe: контент читаем до init */
.hero__content,
[data-motion="reveal"],
[data-motion="reveal-child"] {
  opacity: 1;
  transform: none;
}

@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;
  }

  [data-motion="reveal"],
  [data-motion="reveal-child"] {
    opacity: 1 !important;
    transform: none !important;
  }

  .hero__ambient-canvas {
    display: none !important;
  }
}

/* После JS init (no-preference only) — см. main.js */
.is-motion-ready:not(.prefers-reduced-motion) [data-motion="reveal"]:not(.is-visible):not([data-motion="none"]) {
  opacity: 0;
  transform: translateY(var(--motion-reveal-distance));
}

.is-motion-ready:not(.prefers-reduced-motion) [data-motion="reveal-child"]:not(.is-visible):not([data-motion="none"]) {
  opacity: 0;
  transform: translateY(calc(var(--motion-reveal-distance) * 0.75));
}