body {
  margin: 0;
  background: #f6f7f9;
  color: #20242a;
  font: 14px/1.45 Arial, sans-serif;
}

header {
  align-items: center;
  background: #111827;
  color: white;
  display: flex;
  justify-content: space-between;
  padding: 14px 22px;
}

nav a {
  color: white;
  margin-left: 16px;
  text-decoration: none;
}

main {
  margin: 0 auto;
  max-width: 1120px;
  padding: 24px;
}

.panel, .metric {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 18px;
}

.login {
  margin: 80px auto;
  max-width: 360px;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.metric span {
  color: #6b7280;
  display: block;
}

.metric strong {
  display: block;
  font-size: 30px;
  margin-top: 8px;
}

form {
  display: grid;
  gap: 12px;
}

.row {
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

input, button {
  border: 1px solid #d1d5db;
  border-radius: 6px;
  box-sizing: border-box;
  padding: 10px 12px;
}

button {
  background: #166534;
  color: white;
  cursor: pointer;
}

table {
  background: white;
  border-collapse: collapse;
  margin-top: 18px;
  width: 100%;
}

td, th {
  border-bottom: 1px solid #e5e7eb;
  padding: 10px;
  text-align: left;
}

.error {
  color: #b91c1c;
}

.notice {
  background: #ecfdf5;
  border: 1px solid #86efac;
  border-radius: 6px;
  padding: 12px;
}