:root {
  color-scheme: light dark;
  --fg: #1b1f24;
  --bg: #ffffff;
  --muted: #55606b;
  --border: #d0d7de;
  --accent: #0552b5;
  --danger: #a4030f;
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--fg);
  background: var(--bg);
  margin: 0;
  line-height: 1.5;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

header.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1.5rem;
}

nav ul { list-style: none; display: flex; gap: 1rem; padding: 0; margin: 0; }

fieldset { border: 1px solid var(--border); border-radius: 6px; margin-bottom: 1rem; }

label { display: block; font-weight: 600; margin-top: 0.75rem; }
input, textarea, select {
  width: 100%;
  padding: 0.4rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font: inherit;
  margin-top: 0.25rem;
}

button, .button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  font: inherit;
}
button.danger { background: var(--danger); }

.error-summary {
  border: 2px solid var(--danger);
  padding: 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}

table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; }
th, td { text-align: left; padding: 0.5rem; border-bottom: 1px solid var(--border); }

.status-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.85em;
}

.card { border: 1px solid var(--border); border-radius: 6px; padding: 1rem; margin-bottom: 1rem; }