body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f3f4f6;
  color: #222;
}

.topbar {
  background: #263238;
  color: white;
  padding: 20px;
}

.topbar h1 {
  margin: 0 0 8px 0;
  font-size: 24px;
}

.topbar p {
  margin: 0;
  color: #d7dde1;
}

main {
  padding: 20px;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 18px;
  box-shadow: 0 2px 10px rgba(0,0,0,.08);
}

.card h2 {
  margin-top: 0;
  font-size: 19px;
}

.warning {
  border-left: 6px solid #f5a623;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
}

label {
  display: block;
  font-size: 14px;
  font-weight: bold;
}

input {
  display: block;
  margin-top: 5px;
  width: 100%;
  box-sizing: border-box;
  padding: 8px;
  border: 1px solid #cfd8dc;
  border-radius: 6px;
}

.actions {
  margin-top: 14px;
}

button {
  padding: 10px 18px;
  border: 0;
  border-radius: 8px;
  background: #263238;
  color: white;
  cursor: pointer;
}

button:hover {
  background: #11191d;
}

pre {
  background: #111;
  color: #eee;
  padding: 12px;
  border-radius: 8px;
  overflow: auto;
  font-size: 12px;
}

.chart {
  width: 100%;
  height: 430px;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th, td {
  border: 1px solid #ddd;
  padding: 7px;
  text-align: right;
  white-space: nowrap;
}

th {
  background: #eceff1;
}

td.left {
  text-align: left;
}