:root { color-scheme: light; }
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f3f4f6;
  color: #111827;
}
.container { padding: 12px; max-width: 900px; margin: 0 auto; }
.top-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  padding: 8px 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.nav-link, .link-button {
  text-decoration: none;
  color: #1f2937;
  background: #f3f4f6;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}
.nav-link.active { background: #dbeafe; color: #1d4ed8; }
.logout-form { margin-left: auto; }
.link-button { cursor: pointer; }
.card {
  width: 100%;
  margin: 12px 0;
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.07);
}
h1 { font-size: 1.35rem; margin-top: 0; }
h2 { font-size: 1.1rem; margin: 0 0 8px; }
.form { display: grid; gap: 12px; }
label { display: grid; gap: 6px; font-size: 0.95rem; }
input, button, select {
  font: inherit;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
}
button {
  background: #2563eb;
  border: none;
  color: white;
  font-weight: 600;
}
button.secondary { background: #374151; }
.error { color: #b91c1c; font-weight: 600; }
.dashboard-grid { display: grid; grid-template-columns: 1fr; gap: 0; }
.metric { font-size: 2rem; margin: 0; font-weight: 700; }
.compact-list { margin: 0; padding-left: 18px; display: grid; gap: 6px; }
.muted { color: #6b7280; margin: 0; }
.filters { display: grid; gap: 10px; }