* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Malgun Gothic", "맑은 고딕", -apple-system, sans-serif;
  background: #0b0f14;
  color: #e6edf3;
  min-height: 100vh;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

.greeting {
  font-size: 20px;
  font-weight: bold;
  line-height: 1.5;
  padding: 20px 24px;
  background: linear-gradient(135deg, #10151c, #1a2129);
  border: 1px solid #232b35;
  border-radius: 14px;
  margin-bottom: 24px;
  min-height: 28px;
}

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.tile {
  background: #10151c;
  border: 1px solid #232b35;
  border-radius: 14px;
  padding: 18px 20px;
}

.tile .tile-label {
  font-size: 12px;
  color: #7d8590;
  margin-bottom: 8px;
}

.tile .tile-value {
  font-size: 28px;
  font-weight: bold;
  color: #e6edf3;
}

.tile .tile-sub {
  font-size: 12px;
  color: #9aa4af;
  margin-top: 6px;
  line-height: 1.5;
}

.tile.warn .tile-value { color: #f0a742; }
.tile.danger .tile-value { color: #f26d6d; }
.tile.offline { opacity: 0.45; }
.tile.offline .tile-value { font-size: 15px; color: #7d8590; }

.updated {
  margin-top: 20px;
  font-size: 11px;
  color: #4d5761;
  text-align: right;
}