:root {
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', monospace;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  --container: 1120px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
}

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

a {
  color: var(--link);
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.section {
  padding: var(--space-5) 0;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 1000;
  background: var(--surface);
  padding: 0.5rem 1rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-3);
}

.inline-error {
  color: var(--danger);
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-4) 0;
  }
}