* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--color-text);
  background: var(--color-background);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: var(--font-size-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }
body.lightbox-open { overflow: hidden; }

a { color: var(--color-secondary-dark); text-underline-offset: 0.18em; }
a:hover { color: var(--color-primary-dark); }

button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }

img { display: block; max-width: 100%; }
[hidden] { display: none !important; }

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.3rem, 5vw, 4.5rem); margin-bottom: 1.25rem; }
h2 { font-size: clamp(1.8rem, 3vw, 2.8rem); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.65rem; }

::selection { color: #fff; background: var(--color-secondary-dark); }

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  color: #fff;
  background: var(--color-text);
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
  transition: transform var(--transition);
}
.skip-link:focus { transform: translateY(0); }

.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;
}