body { font-family: Arial, Helvetica, sans-serif; margin: 20px; }
table { border-collapse: collapse; width: 100%; max-width: 900px; }
th, td { border: 1px solid #ddd; padding: 8px; }
th { background: #f4f4f4; text-align: left; }
.status-on { color: green; font-weight: bold; }
.status-off { color: red; font-weight: bold; }
.status-unknown { color: #666; }
.apt-history { margin-top: 12px; max-width: 900px; }
.apt-history ul { margin: 6px 0 12px 20px; }
/* two-column history layout */
.history-columns { display: flex; gap: 24px; flex-wrap: wrap; }
.history-columns .apt-history { flex: 1 1 45%; max-width: none; }