body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
  background: #f4f4f4;
}
.topbar {
  background: #222;
  color: #fff;
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar h1 {
  margin: 0;
  font-size: 1.1rem;
}
.topbar nav a {
  color: #fff;
  margin-left: 1rem;
  text-decoration: none;
}
.topbar nav a:hover {
  text-decoration: underline;
}
.container {
  padding: 1rem 2rem;
}
h2 {
  margin-top: 0;
}
.btn, .btn-small {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  background: #0077cc;
  color: #fff;
  border-radius: 4px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
}
.btn-small {
  padding: 0.2rem 0.6rem;
  font-size: 0.8rem;
}
.btn:hover, .btn-small:hover {
  background: #005fa3;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  background: #fff;
}
th, td {
  border: 1px solid #ddd;
  padding: 0.4rem 0.6rem;
  text-align: left;
}
thead {
  background: #eee;
}
.muted {
  opacity: 0.5;
}
label {
  display: block;
  margin: 0.4rem 0;
}
input[type="text"],
input[type="number"],
input[type="date"],
select {
  width: 100%;
  padding: 0.3rem;
  box-sizing: border-box;
}
fieldset {
  border: 1px solid #ccc;
  padding: 0.5rem;
  margin: 0.5rem 0;
}
legend {
  padding: 0 0.3rem;
  font-size: 0.9rem;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.8rem;
  margin-top: 1rem;
}
.card {
  background: #fff;
  padding: 0.8rem;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.filters {
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: flex-end;
}