html, body { margin: 0; padding: 0; }

.mega-panel {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #fff;
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
    opacity: 0;
    transform: translateY(-6px);
    pointer-events: none;
    transition: opacity 0.15s ease, transform 0.15s ease;
    z-index: 9998;
}
.mega-panel.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.nav-item.active .nav-trigger,
.nav-item.active .nav-trigger svg {
    color: #E00200;
}
.nav-item.active .nav-arrow {
    transform: rotate(180deg);
}
.nav-arrow {
    transition: transform 0.2s ease;
}