body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Sans", sans-serif;
  background: #f4f1ea;
  color: #1c2430;
  font-size: 18px;
}
header, main, nav {
  padding: 12px 16px;
}
header {
  background: #1a3a5c;
  color: white;
}
h1 {
  font-size: 22px;
  margin: 0 0 8px;
}
button, input {
  font-size: 18px;
  padding: 10px 14px;
  margin: 4px 4px 4px 0;
}
nav button[aria-current="true"] {
  background: #1a3a5c;
  color: white;
}
.card {
  background: white;
  border-radius: 8px;
  padding: 12px;
  margin: 8px 0;
}
.warn {
  color: #8a1f1f;
}
table {
  border-collapse: collapse;
  width: max-content;
  min-width: 100%;
}
th, td {
  border-bottom: 1px solid #ddd;
  padding: 8px;
  text-align: left;
  white-space: nowrap;
}
.scroll {
  overflow-x: auto;
}