:root {
  --bg: #0d1117;
  --fg: #e6edf3;
  --muted: #8b949e;
  --border: #30363d;
  --accent: #58a6ff;
  --danger: #f85149;
  --ok: #3fb950;
}

* { box-sizing: border-box; }

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  margin: 0;
  padding: 0;
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 24px; }

header {
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #161b22;
}

header h1 { font-size: 18px; margin: 0; }

nav a {
  margin-right: 16px;
  color: var(--muted);
}

nav a.active { color: var(--fg); font-weight: 600; }

table { width: 100%; border-collapse: collapse; }

th, td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}

th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; }

.kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.kpi {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  background: #161b22;
}

.kpi .label { color: var(--muted); font-size: 12px; text-transform: uppercase; }
.kpi .value { font-size: 28px; font-weight: 600; margin-top: 6px; }

button, .btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #21262d;
  color: var(--fg);
  cursor: pointer;
  font-size: 13px;
}

button:hover { background: #30363d; }
button.danger { color: var(--danger); border-color: var(--danger); }

input[type="password"], input[type="text"] {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #0d1117;
  color: var(--fg);
  width: 100%;
  font-size: 14px;
}

.login-card {
  max-width: 360px;
  margin: 80px auto;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #161b22;
}

.login-card h1 { margin-top: 0; }
.login-card form > * { margin-bottom: 12px; }

.error { color: var(--danger); }
.ok { color: var(--ok); }
.muted { color: var(--muted); font-size: 12px; }