:root {
  --bg: #f5f4ef;
  --card: #ffffff;
  --text: #1d2326;
  --muted: #667075;
  --border: #d9dcd6;
  --accent: #2f8f9d;
  --error: #b3261e;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15191b;
    --card: #1e2326;
    --text: #e8ebe6;
    --muted: #9aa3a6;
    --border: #353d41;
    --accent: #5cc3d1;
    --error: #ff8a80;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}

.topbar .status { color: var(--muted); font-size: 13px; flex: 1; }

main { padding: 16px; max-width: 1200px; margin: 0 auto; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}

.narrow { max-width: 380px; margin: 40px auto; }

.tabs { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.spacer { flex: 1; }

button {
  font: inherit;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

button.ghost { background: transparent; color: var(--accent); }
button.active { background: var(--accent); color: #fff; }
button:disabled { opacity: 0.5; cursor: default; }

label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }

input, select {
  font: inherit;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  min-width: 220px;
}

#signInForm { display: grid; gap: 12px; }

.row { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }

.summary { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.summary div {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  min-width: 130px;
}
.summary span { display: block; font-size: 12px; color: var(--muted); }
.summary strong { font-size: 18px; }

.chart { width: 100%; height: 480px; }

.scroll { overflow: auto; max-height: 70vh; }

table { border-collapse: collapse; font-size: 13px; white-space: nowrap; }
th, td { padding: 6px 10px; border-bottom: 1px solid var(--border); text-align: left; }
th { position: sticky; top: 0; background: var(--card); }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.error { color: var(--error); margin: 0; }

@media (max-width: 640px) {
  main { padding: 12px; }
  .chart { height: 380px; }
  input, select { min-width: 0; width: 100%; }
}