:root {
  --brand: #008c87;
  --brand-dark: #066f6b;
  --bg: #f3f6f7;
  --card: #ffffff;
  --text: #1f2a2e;
  --muted: #6b7b80;
  --border: #e2eaec;
  --danger: #d9534f;
  --success: #2f9e6b;
  --warn: #e0a800;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); }

.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  background: linear-gradient(180deg, #008c87, #0a5f6d);
  color: #fff;
  padding: 24px 16px;
}
.sidebar h1 {
  font-size: 18px;
  margin: 0 0 24px;
  font-weight: 700;
}
.sidebar a {
  display: block;
  color: rgba(255,255,255,.9);
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 6px;
}
.sidebar a:hover,
.sidebar a.active {
  background: rgba(255,255,255,.16);
  color: #fff;
}
.main { flex: 1; padding: 24px; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.topbar h2 { margin: 0; font-size: 24px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 16px;
}
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 28px; font-weight: 700; margin-top: 8px; color: var(--brand); }

table { width: 100%; border-collapse: collapse; }
th, td {
  text-align: left;
  padding: 12px 10px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  vertical-align: middle;
}
th { color: var(--muted); font-weight: 600; }
.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
}
.btn:hover { background: var(--brand-dark); color: #fff; }
.btn-secondary { background: #6c757d; }
.btn-danger { background: var(--danger); }
.btn-sm { padding: 6px 10px; font-size: 12px; }
.actions form { display: inline; }
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #eef5f5;
  color: var(--brand);
}
.badge-off { background: #f1f1f1; color: #777; }
.badge-ok { background: #e8f7ef; color: var(--success); }
.badge-warn { background: #fff6db; color: #9a7b00; }
.badge-bad { background: #fdecea; color: var(--danger); }

.form-row { margin-bottom: 14px; }
.form-row label { display: block; margin-bottom: 6px; color: var(--muted); font-size: 13px; }
.form-row input[type="text"],
.form-row input[type="password"],
.form-row input[type="date"],
.form-row input[type="time"],
.form-row select,
.form-row textarea {
  width: 100%;
  max-width: 520px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
.form-row textarea { min-height: 90px; }
.alert {
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 14px;
}
.alert-success { background: #e8f7ef; color: var(--success); }
.alert-error { background: #fdecea; color: var(--danger); }

.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e8f6f5, #f3f6f7 45%, #e9f1f8);
}
.auth-card {
  width: 380px;
  background: #fff;
  border-radius: 16px;
  padding: 28px;
  border: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(0,0,0,.05);
}
.auth-card h1 { margin: 0 0 8px; font-size: 22px; }
.auth-card p { margin: 0 0 20px; color: var(--muted); font-size: 13px; }
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 14px; flex-wrap: wrap; }
.muted { color: var(--muted); font-size: 13px; }

@media (max-width: 960px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .layout { display: block; }
  .sidebar { width: auto; }
}