:root {
  --bg: #0f1218;
  --card: #171c26;
  --border: #262d3a;
  --text: #e6e9ef;
  --muted: #8b94a7;
  --accent: #4f8cff;
  --green: #34d399;
  --red: #f87171;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 24px;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}
header h1 { font-size: 22px; margin: 0; }
header h1 span { color: var(--muted); font-weight: 400; font-size: 16px; }
.actions { display: flex; gap: 10px; }
.btn, .ghost {
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
}
.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.ghost:hover { border-color: var(--accent); }

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}
.kpi {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.kpi .label { color: var(--muted); font-size: 13px; margin-bottom: 6px; }
.kpi .value { font-size: 24px; font-weight: 700; }
.kpi .sub { font-size: 12px; color: var(--muted); margin-top: 4px; }
.pos { color: var(--green); }
.neg { color: var(--red); }

/* ---------- auth pages ---------- */
.auth-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
}
.auth-card {
  width: 380px;
  max-width: 92vw;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
}
.auth-card h1 { font-size: 22px; margin: 0 0 4px; }
.auth-sub { color: var(--muted); font-size: 13px; margin: 0 0 20px; }
.auth-card form { display: flex; flex-direction: column; gap: 8px; }
.auth-card label { font-size: 13px; color: var(--muted); margin-top: 4px; }
.auth-card input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
}
.auth-card input:focus { outline: none; border-color: var(--accent); }
.auth-card button {
  margin-top: 14px;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 11px;
  font-size: 14px;
  font-weight: 600;
}
.auth-alt { text-align: center; font-size: 13px; color: var(--muted); margin-top: 14px; }
.auth-alt a { color: var(--accent); text-decoration: none; }
.user-label { color: var(--muted); font-size: 14px; font-weight: 600; }

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.card.span-2 { grid-column: span 2; }
.card h2 { font-size: 15px; margin: 0 0 12px; }
.card h2 small { color: var(--muted); font-weight: 400; }
canvas { max-height: 340px; }

.status { color: var(--muted); font-size: 13px; min-height: 18px; }
@media (max-width: 800px) {
  .grid { grid-template-columns: 1fr; }
  .card.span-2 { grid-column: span 1; }
}