:root {
  --bg: #f2f4f7;
  --card: #ffffff;
  --text: #1b2430;
  --muted: #5b6470;
  --accent: #0c6b5f;
  --danger: #bf1e2e;
  --border: #d8dee6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: linear-gradient(160deg, #ecf3ff 0%, #f5f6fb 60%, #eef6f1 100%);
  color: var(--text);
}

.page {
  max-width: 840px;
  margin: 2.5rem auto;
  padding: 0 1rem;
}

.site-header {
  margin-bottom: 0.9rem;
}

.site-header h1 {
  margin: 0;
  font-size: 1.75rem;
  letter-spacing: 0.02em;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem;
  box-shadow: 0 10px 30px rgba(20, 40, 70, 0.08);
}

h1 {
  margin: 0 0 1rem;
  font-size: 1.5rem;
}

.status {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  font-weight: 700;
}

.fuel-availability {
  font-size: 1.55rem;
  font-weight: 800;
}

.status.available {
  color: var(--accent);
}

.status.unavailable {
  color: var(--danger);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.metric {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.8rem;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.metric strong {
  font-size: 1.1rem;
}

.note {
  margin: 0.5rem 0;
}

.updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

.admin-link {
  text-align: right;
  margin: 0.7rem 0 0;
}

.admin-link a,
.admin-head a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.admin-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.form-grid {
  display: grid;
  gap: 0.55rem;
}

input,
textarea,
button {
  font: inherit;
}

input,
textarea {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.2rem 0;
}

button {
  margin-top: 0.4rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 0.65rem 0.9rem;
  font-weight: 700;
  cursor: pointer;
}

.alerts {
  margin-bottom: 0.8rem;
}

.alert {
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.alert-success {
  background: #e6f4ef;
  color: #136447;
}

.alert-error {
  background: #fdecee;
  color: #9c1c2a;
}