body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
}

h2 {
    color: #333;
    font-size: 24px;
    margin-top: 20px;
}

div {
    text-align: center;
}

#countrySelect {
    padding: 6px;
    font-size: 16px;
    margin-left: 5px;
}

.intervention-filter {
    margin: 0 10px;
    transform: scale(1.2);
    cursor: pointer;
}

label {
    font-size: 14px;
    margin: 5px;
}

#chart-container {
    display: flex;
    justify-content: center;
    margin: 30px 0;
}

.chart {
    width: 90%;
    max-width: 1200px;
    height: 600px;
    position: relative;
    border: 1px solid #ccc;
    background-color: #fff;
    padding: 20px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

.tooltip {
    position: absolute;
    opacity: 0;
    transition: opacity 0.2s ease;  
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 8px;
    border-radius: 4px;
    pointer-events: none;
    font-size: 12px;
}

.axis-label {
    font-size: 12px;
    font-weight: bold;
    fill: #333;
}

.grid line {
    stroke: #ddd;
    stroke-opacity: 0.7;
    shape-rendering: crispEdges;
}

.line-path {
    stroke: black;
    stroke-width: 2.5px;
    fill: none;
}

.response-marker {
    fill: #e74c3c;
    stroke: white;
    stroke-width: 1.5px;
}