body { font-family: sans-serif; display: flex; justify-content: center; padding: 2rem; background: #f4f4f9; }
#app { background: white; padding: 2rem; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); max-width: 500px; width: 100%; }
.status-box { padding: 1rem; border-left: 5px solid #ccc; margin-top: 1rem; }
.new-data { border-color: #28a745; background: #e8f5e9; }
.old-data { border-color: #ffc107; background: #fffde7; }
.loading { font-style: italic; color: #666; }
.date-val { font-weight: bold; }