.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.nav-scrolled {
    background-color: rgba(251, 249, 248, 0.95);
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.nav-scrolled .nav-text {
    color: #1b1c1c;
}

.nav-scrolled .logo-img {
    filter: invert(1);
}

/* Hamburguer — cor das linhas quando navbar scrollada */
.nav-scrolled .hamburger-line {
    background-color: #1b1c1c;
}

/* Hamburguer aberto → X */
#menu-toggle.is-open .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
#menu-toggle.is-open .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
#menu-toggle.is-open .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}