:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #2a2f3a;
  --text: #e6e9ef;
  --muted: #9aa4b2;
  --accent: #5c7cfa;
  --accent-2: #3b5bdb;
  --good: #37b24d;
  --warn: #f59f00;
  --danger: #e03131;
  --radius: 10px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

a { color: var(--accent); }

.loading { padding: 4rem; text-align: center; color: var(--muted); }

header.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
header.topbar h1 { font-size: 1.05rem; margin: 0; font-weight: 650; }
header.topbar .logo { font-size: 1.3rem; }
header.topbar .spacer { flex: 1; }
header.topbar .user { color: var(--muted); font-size: 0.9rem; text-align: right; }
header.topbar .user b { color: var(--text); }
.badge {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--muted);
}
.badge.admin { color: var(--accent); border-color: var(--accent-2); }

nav.tabs { display: flex; gap: 0.25rem; padding: 0 1.25rem; background: var(--panel); border-bottom: 1px solid var(--border); }
nav.tabs button {
  background: none; border: none; color: var(--muted);
  padding: 0.7rem 1rem; cursor: pointer; font-size: 0.95rem;
  border-bottom: 2px solid transparent;
}
nav.tabs button.active { color: var(--text); border-bottom-color: var(--accent); }

main { max-width: 1000px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.card h2 { margin: 0 0 1rem; font-size: 1rem; font-weight: 650; }
.card h3 { margin: 1.25rem 0 0.5rem; font-size: 0.9rem; color: var(--muted); font-weight: 600; }

.row { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: end; }
.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field label { font-size: 0.78rem; color: var(--muted); }

input, select, textarea {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.5rem 0.6rem;
  font: inherit;
  min-width: 12rem;
}
textarea { min-height: 3rem; width: 100%; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent-2); border-color: var(--accent); }

button.btn {
  background: var(--accent-2);
  border: 1px solid var(--accent);
  color: white;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
}
button.btn:hover { background: var(--accent); }
button.btn.ghost { background: transparent; color: var(--text); border-color: var(--border); }
button.btn.ghost:hover { background: var(--panel-2); }
button.btn.danger { background: transparent; border-color: var(--danger); color: #ff8787; }
button.btn.danger:hover { background: rgba(224,49,49,0.12); }
button.btn.small { padding: 0.3rem 0.55rem; font-size: 0.82rem; }

.metric { display: flex; align-items: baseline; gap: 0.5rem; margin: 0.5rem 0; }
.metric .value { font-size: 2.6rem; font-weight: 700; color: var(--text); }
.metric .unit { color: var(--muted); }
.breakdown { color: var(--muted); font-size: 0.92rem; }
.breakdown b { color: var(--text); }

table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; }
th, td { text-align: left; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
th { color: var(--muted); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.note {
  background: rgba(245,159,0,0.08);
  border: 1px solid rgba(245,159,0,0.35);
  color: #ffd8a8;
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  font-size: 0.88rem;
}
.error { color: #ff8787; margin: 0.5rem 0; }
.muted { color: var(--muted); }
.chart-wrap { overflow-x: auto; }
svg.chart { width: 100%; height: 320px; display: block; }
svg.chart .axis { stroke: var(--border); }
svg.chart .grid { stroke: var(--border); stroke-dasharray: 2 4; opacity: 0.5; }
svg.chart .line { fill: none; stroke: var(--accent); stroke-width: 2; }
svg.chart .area { fill: url(#areaGrad); opacity: 0.25; }
svg.chart .avg { stroke: var(--warn); stroke-width: 1.5; stroke-dasharray: 5 4; }
svg.chart text { fill: var(--muted); font-size: 11px; }

.login-wrap { max-width: 420px; margin: 4rem auto; }
.login-wrap .card { text-align: center; }
.login-wrap .btn { width: 100%; margin-top: 0.5rem; }
.stack { display: flex; flex-direction: column; gap: 0.6rem; }

@media (max-width: 640px) {
  input, select { min-width: 0; width: 100%; }
  .field { width: 100%; }
}