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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.5em;
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-text);
}

h1 { font-size: var(--fs-h1); letter-spacing: 0.01em; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p { margin: 0 0 1em; }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

a:hover { color: var(--color-primary-dark); }

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

img { height: auto; }

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

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

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

[hidden] { display: none !important; }

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

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 8px 16px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-btn);
}

.skip-link:focus { top: 8px; color: var(--color-text-inverse); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}