:root {
  --color-bg: #ffffff;
  --color-text: #1f2328;
  --color-muted: #59636e;
  --color-accent: #0a5c8a;
  --color-accent-contrast: #ffffff;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-heading: var(--font-body);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;
  --measure: 65ch;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}
img, picture { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { font-family: var(--font-heading); line-height: 1.2; margin: 0 0 var(--space-3); }
p { margin: 0 0 var(--space-3); max-width: var(--measure); }
a { color: var(--color-accent); }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }

.skip-link {
  position: absolute; left: var(--space-3); top: -100px;
  padding: var(--space-2) var(--space-3);
  background: var(--color-accent); color: var(--color-accent-contrast);
}
.skip-link:focus { top: var(--space-3); z-index: 10; }

.site-header {
  display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; justify-content: space-between;
  padding: var(--space-3) var(--space-4);
}
.site-name { font-weight: 700; text-decoration: none; color: inherit; }
.site-nav ul { display: flex; flex-wrap: wrap; gap: var(--space-3); list-style: none; margin: 0; padding: 0; }
.site-nav a { text-decoration: none; color: inherit; }
.site-nav a[aria-current="page"] { text-decoration: underline; text-underline-offset: 0.3em; }

main { padding: var(--space-4); }
.hero { padding: var(--space-5) 0; }
.grid { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.card { padding: var(--space-4); border: 1px solid #d0d7de; border-radius: 0.5rem; }

.form { display: grid; gap: var(--space-3); max-width: 40rem; }
.form label { display: grid; gap: var(--space-1); font-weight: 600; }
.form input, .form textarea, .form select {
  font: inherit; padding: var(--space-2) var(--space-3); border: 1px solid #8c959f; border-radius: 0.375rem;
}
.form .error { color: #a40e26; }
.button {
  display: inline-block; padding: var(--space-2) var(--space-4);
  background: var(--color-accent); color: var(--color-accent-contrast);
  border: 0; border-radius: 0.375rem; font: inherit; cursor: pointer; text-decoration: none;
}

.site-footer { padding: var(--space-5) var(--space-4); color: var(--color-muted); }
.site-footer ul { display: flex; flex-wrap: wrap; gap: var(--space-3); list-style: none; padding: 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}