:root {
  --bg-primary: #1B2D4F;
  --bg-secondary: #162540;
  --bg-card: #243B5E;
  --bg-card-soft: #2E4A70;
  --accent: #F26522;
  --text-primary: #FFFFFF;
  --text-secondary: #A8BDD4;
  --text-muted: #6E8AAF;
  --border: #2E4A70;
  --success: #22C55E;
  --warning: #F59E0B;
  --error: #EF4444;
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 400;
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}

/* ----------- Brand ----------- */
.brand-kc {
  color: var(--accent);
  font-weight: 800;
  letter-spacing: -0.5px;
}
.brand-rest {
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.5px;
  margin-left: 2px;
}
.brand-sep {
  color: var(--text-muted);
  margin: 0 10px;
  font-weight: 300;
}
.brand-product {
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.3px;
}

/* ----------- Top bar ----------- */
.topbar {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.brandbar {
  display: flex;
  align-items: baseline;
  font-size: 22px;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-secondary);
}
.topbar-right code {
  background: var(--bg-card);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 11px;
}
.meta-user b { color: var(--text-primary); }
.btn-logout {
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  transition: background 0.15s ease;
}
.btn-logout:hover { background: #d8541a; }

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px 24px 40px;
}

/* ----------- Cards ----------- */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.card h2 {
  margin: 0 0 14px 0;
  font-size: 13px;
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: 0.3px;
}
.card .sub {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
}

.status-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.statcard {
  text-align: center;
  padding: 16px 12px;
}
.statcard .label {
  color: var(--text-secondary);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  font-weight: 500;
}
.statcard .value {
  font-size: 24px;
  font-weight: 700;
  margin: 8px 0 4px 0;
  color: var(--text-primary);
}
.statcard .sub {
  color: var(--text-muted);
  font-size: 11px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(440px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

canvas { width: 100% !important; height: 240px !important; }

.ok { color: var(--success); }
.bad { color: var(--error); }
.warn { color: var(--warning); }

/* ----------- Tables ----------- */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table th, table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
table th {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
table td { color: var(--text-primary); }
table tbody tr:hover { background: var(--bg-card); }
table code {
  background: var(--bg-card);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-secondary);
}

footer {
  display: flex;
  justify-content: space-between;
  margin: 24px 24px 0;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}
footer a { color: var(--text-secondary); text-decoration: none; }
footer a:hover { color: var(--accent); }

/* ----------- Login page ----------- */
.login-body {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}
.login-shell { width: 100%; max-width: 420px; }
.login-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px 32px 28px;
  box-shadow: 0 24px 48px rgba(0,0,0,0.4);
}
.login-card .brand {
  font-size: 32px;
  text-align: center;
  margin-bottom: 10px;
  letter-spacing: -1px;
}
.product-line {
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.3px;
  margin-bottom: 28px;
}
.login-form { display: flex; flex-direction: column; gap: 16px; }
.login-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.login-form label span {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  color: var(--text-secondary);
  font-weight: 500;
}
.login-form input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 14px;
  color: var(--text-primary);
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.login-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(242, 101, 34, 0.15);
}
.btn-primary {
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
  margin-top: 4px;
}
.btn-primary:hover { background: #d8541a; }
.btn-primary:active { transform: translateY(1px); }
.alert-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #FECACA;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
  text-align: center;
}
.footer-note {
  text-align: center;
  margin-top: 24px;
  color: var(--text-muted);
  font-size: 11px;
}
.footer-note a { color: var(--text-secondary); text-decoration: none; }
.footer-note a:hover { color: var(--accent); }

/* ----------- Responsive ----------- */
@media (max-width: 768px) {
  .grid, .grid-3 { grid-template-columns: 1fr; }
  canvas { height: 200px !important; }
  .topbar { padding: 12px 16px; }
  .container { padding: 16px; }
  .brandbar { font-size: 18px; }
  .topbar-right { font-size: 11px; gap: 10px; }
  footer { flex-direction: column; gap: 6px; }
}