:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #14213d;
  --muted: #6b7280;
  --brand: #0f766e;
  --brand-strong: #115e59;
  --warn: #b45309;
  --danger: #b91c1c;
  --border: #d7dce5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top left, #dbeafe 0%, var(--bg) 45%, #ecfeff 100%);
}

.topbar {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}

.topbar nav {
  display: flex;
  gap: 0.9rem;
}

.topbar a {
  color: var(--brand-strong);
  text-decoration: none;
  font-weight: 600;
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
}

.container {
  max-width: 1200px;
  margin: 1rem auto;
  padding: 0 1rem 2rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1rem;
}

.metric h2 {
  margin: 0;
  font-size: 2rem;
}

.metric p {
  color: var(--muted);
  margin: 0.4rem 0 0;
}

.grid {
  display: grid;
  gap: 1rem;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stack {
  display: grid;
  gap: 0.6rem;
}

.stack.mini {
  gap: 0.35rem;
}

.inline-form,
.inline-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: end;
}

.actions {
  display: flex;
  gap: 0.7rem;
  margin-top: 0.7rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.92rem;
}

input,
select,
button {
  font: inherit;
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.btn {
  background: var(--brand);
  color: #fff;
  border: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--brand-strong);
}

.btn-warning {
  background: var(--warn);
}

.btn-link {
  background: transparent;
  color: var(--brand-strong);
  padding: 0.2rem 0.4rem;
}

.alert {
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  margin-bottom: 1rem;
}

.alert-success {
  background: #dcfce7;
  color: #166534;
}

.alert-info {
  background: #e0f2fe;
  color: #0c4a6e;
}

.alert-error {
  background: #fee2e2;
  color: #991b1b;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.8rem;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.45rem;
  text-align: left;
  font-size: 0.9rem;
}

th {
  background: #f8fafc;
}

.auth-card {
  max-width: 420px;
  margin: 2rem auto;
}

@media (max-width: 920px) {
  .grid.two,
  .grid.four {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-wrap: wrap;
    justify-content: center;
  }

  .topbar nav {
    flex-wrap: wrap;
    justify-content: center;
  }
}