:root { --ink: #1c2733; --muted: #6b7a89; --line: #e2e8ee; --warn: #b3402a; }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, sans-serif; color: var(--ink); background: #f7f9fb; }
.topbar { display: flex; justify-content: space-between; align-items: center;
  padding: 12px 24px; background: #fff; border-bottom: 1px solid var(--line); }
.topbar nav a { margin-right: 20px; color: var(--ink); text-decoration: none; }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.freshness { font-size: 14px; color: var(--muted); }
.freshness-stale { color: var(--warn); font-weight: 600; }
main { max-width: 1100px; margin: 0 auto; padding: 24px; }
.login { max-width: 360px; margin: 80px auto; background: #fff; padding: 32px;
  border: 1px solid var(--line); border-radius: 8px; }
.login label { display: block; margin-bottom: 16px; }
.login input { width: 100%; padding: 8px; border: 1px solid var(--line); border-radius: 4px; }
.grid { width: 100%; border-collapse: collapse; background: #fff; margin-bottom: 24px; }
.grid th, .grid td { padding: 8px 12px; border-bottom: 1px solid var(--line); text-align: left; }
.error { color: var(--warn); }
.placeholder { color: var(--muted); }

.period { color: var(--muted); font-size: 14px; margin-top: -8px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px; margin-bottom: 24px; }
.tile { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.tile-value { font-size: 30px; font-weight: 650; line-height: 1.1; }
.tile-label { color: var(--muted); font-size: 14px; margin-top: 6px; }
.notice { background: #fff6ed; border: 1px solid #f0d3b6; border-radius: 6px;
  padding: 12px 16px; font-size: 14px; }
h2 { margin-top: 32px; }
h3 { margin-top: 24px; font-size: 17px; }
.delta { color: var(--muted); font-size: 13px; }