body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #1d252c;
  background: #f5f7f8;
}

.shell {
  display: grid;
  grid-template-columns: 230px 1fr;
  min-height: 100vh;
}

.nav {
  background: #17212b;
  color: #fff;
  padding: 20px;
}

.nav a {
  display: block;
  color: #d9e2e8;
  padding: 10px 0;
  text-decoration: none;
}

.main {
  padding: 28px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
}

.card, table, form {
  background: #fff;
  border: 1px solid #d8e0e6;
  border-radius: 8px;
}

.card {
  padding: 16px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 10px;
  border-bottom: 1px solid #e7edf1;
  text-align: left;
}

input, button {
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #b9c6cf;
}

button {
  background: #0b6655;
  color: #fff;
  border-color: #0b6655;
}

.grid-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  padding: 14px;
  margin: 12px 0;
  align-items: center;
}

.inline-form {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px;
  align-items: center;
}

textarea {
  min-height: 90px;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #b9c6cf;
}

code, pre {
  white-space: pre-wrap;
  word-break: break-word;
}

@media (max-width: 720px) {
  .shell {
    grid-template-columns: 1fr;
  }
}