body {
    font-family: 'Inter', sans-serif;
    background-color: #f4f4f5; /* zinc-100 */
    color: #18181b; /* zinc-900 */
}

.chart-container {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    height: 300px;
    max-height: 400px;
}

@media (min-width: 768px) {
    .chart-container {
        height: 350px;
    }
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -31px;
    top: 5px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: #0891b2; /* cyan-600 */
    border: 4px solid #e4e4e7; /* zinc-200 */
}