:root {
    --color-primary: #365314;
    --color-primary-dark: #1a2e05; 
}

.scroll-to-top {

    position: fixed;
    bottom: 30px;
    right: 30px;

    width: 50px;
    height: 50px;
    
    background-color: var(--color-primary, #365314);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    
    z-index: 1000;
    
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);

    transition: all 0.3s ease;

    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    background-color: var(--color-primary-dark, #1a2e05);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.scroll-to-top:active {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.scroll-to-top:focus {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

@media (max-width: 768px) {
    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
}

@media (prefers-reduced-motion: no-preference) {
    .scroll-to-top {
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
}

@media (prefers-reduced-motion: reduce) {
    .scroll-to-top {
        transition: opacity 0.2s ease;
    }
    
    .scroll-to-top:hover {
        transform: none;
    }
}