:root {
  --bg: #0f1620;
  --panel: #182231;
  --panel-2: #1f2b3d;
  --text: #e8eef7;
  --muted: #95a3b9;
  --accent: #4f8cff;
  --green: #25c281;
  --red: #ef4f4f;
  --border: #283447;
}
* { box-sizing: border-box; }
body { margin: 0; font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Inter, Roboto, sans-serif; background: var(--bg); color: var(--text); }
.muted { color: var(--muted); }

.login-body { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg, #0f1620, #182231); }
.login-card { background: var(--panel); padding: 32px; border-radius: 14px; width: 320px; border: 1px solid var(--border); box-shadow: 0 12px 40px rgba(0,0,0,.45); }
.login-card h1 { margin: 0 0 4px; font-size: 24px; }
.login-card form { margin-top: 20px; display: flex; flex-direction: column; gap: 12px; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.login-card input { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); padding: 10px; border-radius: 8px; }
.login-card button { background: var(--accent); color: white; border: none; padding: 11px; border-radius: 8px; font-weight: 600; cursor: pointer; margin-top: 6px; }
.login-card .err { color: var(--red); font-size: 12px; min-height: 16px; margin: 0; }

.topbar { display: flex; justify-content: space-between; align-items: center; padding: 14px 24px; background: var(--panel); border-bottom: 1px solid var(--border); }
.topbar .brand { font-weight: 600; }
.user-area { display: flex; gap: 12px; align-items: center; }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); padding: 6px 12px; border-radius: 6px; cursor: pointer; }

.container { padding: 24px; max-width: 1280px; margin: 0 auto; }
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 18px; }
.kpi { background: var(--panel); padding: 16px 18px; border-radius: 12px; border: 1px solid var(--border); }
.kpi-title { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.kpi-value { font-size: 26px; font-weight: 700; margin-top: 4px; }
.kpi-sub { color: var(--muted); font-size: 12px; margin-top: 4px; }
.kpi-sub.up { color: var(--green); } .kpi-sub.down { color: var(--red); }

.card { background: var(--panel); padding: 18px; border-radius: 12px; border: 1px solid var(--border); margin-bottom: 18px; }
.card h2 { margin: 0 0 12px; font-size: 14px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }

@media (max-width: 900px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}