body {
    font-family: 'Poppins', sans-serif;
    background-color: #0f172a; /* Warna slate-900 dari Tailwind */
    color: #e2e8f0; /* Warna slate-200 dari Tailwind */
}

/* Kelas kustom untuk garis bawah animasi pada link navigasi */
.nav-link {
    position: relative;
    transition: color 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #38bdf8; /* Warna sky-400 dari Tailwind */
    transition: width 0.3s ease-in-out;
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* Kelas kustom untuk animasi fade-in saat section muncul di layar */
.fade-in-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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