:root {
  --navy: #142440;
  --gold: #b88a2e;
  --grey: #5a6470;
  --bg: #f5f6f8;
  --card-bg: #ffffff;
  --border: #e1e4e9;
  --text: #1a1f29;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1420;
    --card-bg: #171d2b;
    --border: #2a3142;
    --text: #e6e9ef;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--card-bg);
}
.brand { color: var(--navy); font-weight: 700; text-decoration: none; }
@media (prefers-color-scheme: dark) { .brand { color: #dfe6f5; } }
main { max-width: 900px; margin: 0 auto; padding: 24px; }
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.card.narrow { max-width: 360px; margin: 40px auto; }
h1 { margin-top: 0; color: var(--navy); }
@media (prefers-color-scheme: dark) { h1 { color: #dfe6f5; } }
label { display: block; margin-bottom: 12px; font-size: 14px; }
input[type=text], input[type=password], input[type=file] {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}
button {
  background: var(--navy);
  color: white;
  border: none;
  padding: 9px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}
button:disabled { opacity: 0.6; cursor: default; }
.logout-form button { background: transparent; color: var(--grey); border: 1px solid var(--border); }
.error { color: #c0392b; }
.status { color: var(--grey); font-size: 14px; }
.note { color: var(--grey); font-size: 13px; }
.run-panel { margin-bottom: 20px; }
.month-list { list-style: none; padding: 0; }
.month-list li { padding: 6px 0; border-bottom: 1px solid var(--border); }
.month-list a, .downloads a { color: var(--gold); text-decoration: none; font-weight: 600; }
.downloads { display: flex; gap: 16px; margin: 16px 0; }
.dashboard-frame {
  width: 100%;
  height: 80vh;
  border: 1px solid var(--border);
  border-radius: 8px;
}