body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: #1a1a1a;
  background: #f5f5f5;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 16px;
  background: #1f2d3d;
  padding: 10px 20px;
}

.topnav a {
  color: #d0d7de;
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 14px;
}

.topnav a:hover {
  background: #33475a;
  color: #ffffff;
}

.topnav a.active {
  background: #33475a;
  color: #ffffff;
  font-weight: bold;
}

.topnav .navuser {
  margin-left: auto;
  color: #d0d7de;
  font-size: 13px;
}

.topnav a:last-child {
  margin-left: 0;
}

main {
  padding: 20px;
}

.cards {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

.card {
  border: 1px solid #ccc;
  background: #ffffff;
  padding: 14px 20px;
  border-radius: 6px;
  min-width: 160px;
}

.cardnum {
  font-size: 28px;
  font-weight: bold;
  color: #1f2d3d;
}

.cardlabel {
  font-size: 13px;
  color: #555;
  margin-top: 4px;
}

table {
  border-collapse: collapse;
  width: 100%;
  background: #ffffff;
}

th, td {
  border: 1px solid #ccc;
  padding: 6px 10px;
  font-size: 13px;
  text-align: left;
}

th {
  background: #1f2d3d;
  color: #ffffff;
}

tbody tr:nth-child(even) {
  background: #f0f2f5;
}

.num {
  text-align: right;
}

.neg {
  color: #c0392b;
  font-weight: bold;
}

.err {
  color: #c0392b;
  font-weight: bold;
}

.unset {
  color: #999;
  font-style: italic;
}

.note {
  background: #fdf6e3;
  border-left: 4px solid #d9a441;
  padding: 10px 12px;
  margin: 16px 0;
  font-size: 13px;
  line-height: 1.5;
}

form label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
}

form input {
  padding: 6px 8px;
  font-size: 14px;
  width: 260px;
}

form button {
  margin-top: 16px;
  padding: 8px 16px;
  font-size: 14px;
}