:root {
  --bg: #f5f6f8; --card: #fff; --ink: #1a202c; --muted: #718096;
  --accent: #2b6cb0; --border: #e2e8f0;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--ink); }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 12px 20px; background: #1a202c; color: #fff; }
.topbar a { color: #90cdf4; text-decoration: none; }
.brand { font-weight: 600; }
main { max-width: 1000px; margin: 24px auto; padding: 0 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 16px; }
.login { max-width: 360px; margin: 60px auto; }
.login label, form label { display: block; margin: 10px 0; font-size: 14px; }
input, select { width: 100%; padding: 8px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }
.controls { display: flex; gap: 16px; align-items: end; flex-wrap: wrap; margin-bottom: 16px; }
.controls label { font-size: 13px; color: var(--muted); }
.controls select { width: auto; }
.live { margin-left: auto; color: var(--accent); font-weight: 600; }
button { background: var(--accent); color: #fff; border: 0; border-radius: 8px; padding: 10px 16px; font-size: 14px; cursor: pointer; width: 100%; }
.error { color: #c53030; font-size: 14px; }
.muted { color: var(--muted); }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; margin-bottom: 16px; }
.kpi { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; text-align: center; }
.kpi .v { font-size: 28px; font-weight: 700; color: var(--accent); }
.kpi .l { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.charts { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
/* Chart.js potřebuje vlastní kontejner s pevnou výškou, jinak se graf podle výšky karty scvrkává */
.chart-box { position: relative; height: 240px; }
.chart-box.wide { height: 280px; }
.players { display: grid; grid-template-columns: 1fr 2fr; gap: 16px; }
.audience { display: grid; grid-template-columns: 1fr 1.3fr 1.3fr; gap: 16px; }
.chart-box.tall { height: 340px; }
.pl-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.pl-tools { display: inline-flex; align-items: center; gap: 12px; }
.chk { display: inline-flex; align-items: center; gap: 4px; margin: 0; font-size: 12px; color: var(--muted); cursor: pointer; }
.chk input { width: auto; margin: 0; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg button { width: auto; background: transparent; color: var(--muted); border-radius: 0; padding: 4px 12px; font-size: 12px; }
.seg button.on { background: var(--accent); color: #fff; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.credit { font-size: 11px; color: var(--muted); margin: 8px 0 0; }
.credit a { color: inherit; }
h1 { font-size: 20px; }
h2 { font-size: 15px; color: var(--muted); margin: 0 0 12px; }
h3 { font-size: 13px; font-weight: 500; color: var(--muted); margin: 0 0 8px; }
@media (max-width: 900px) { .audience { grid-template-columns: 1fr; } }
@media (max-width: 700px) { .charts, .players { grid-template-columns: 1fr; } .kpis { grid-template-columns: 1fr; } }