.irm-45-container {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.irm-45-backgrounds {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.irm-45-bg-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.5s ease-in-out, transform 5s linear;
    transform: scale(1.05);
}

.irm-45-bg-layer.active {
    opacity: 1;
    transform: scale(1);
}

.irm-45-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.irm-45-menu {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    padding-left: 5vw;
}

.irm-45-menu-item {
    font-size: 4rem;
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
    margin: 10px 0;
    position: relative;
    display: inline-block;
    width: fit-content;
    transition: opacity 0.3s ease;
    opacity: 0.6;
}

.irm-45-menu-item:hover,
.irm-45-menu-item.active {
    opacity: 1;
}

.irm-45-menu-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 4px;
    transition: width 0.3s ease-in-out;
}

.irm-45-menu-item:hover::after,
.irm-45-menu-item.active::after {
    width: 100%;
}

@media (max-width: 768px) {
    .irm-45-menu-item {
        font-size: 2.5rem;
    }
}