body {
    font-family: 'Lexend', sans-serif;
    scroll-behavior: smooth;
}
.tab-active {
    border-color: #059669; /* emerald-600 */
    color: #059669;
    background-color: #D1FAE5; /* emerald-100 */
}
.tab-inactive {
    border-color: transparent;
    color: #4B5563; /* gray-600 */
}
.section-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.section-fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}
.chart-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    height: 350px;
    max-height: 450px;
}
@media (min-width: 768px) {
    .chart-container {
        height: 450px;
    }
}
.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #059669;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}