* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', sans-serif;
    color: #fff;
    background: url('BatMan.jpg') center center/cover no-repeat fixed;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    z-index: -1;
}

.navbar {
    backdrop-filter: blur(10px);
}

.navbar-toggler {
    border: none;
}

.navbar-nav .nav-link {
    position: relative;
    transition: 0.3s;
}

.navbar-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -5px;
    width: 0%;
    height: 2px;
    background: linear-gradient(90deg, #00c6ff, #0072ff);
    transition: 0.3s;
}

.navbar-nav .nav-link:hover {
    color: #00c6ff !important;
}

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

.navbar-nav .nav-link.active {
    color: #00c6ff !important;
}

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

section {
    padding: 80px 0;
}

h1,
h2,
h4 {
    text-shadow: 0 0 15px rgba(0, 0, 0, 0.9);
}

section p {
    max-width: 700px;
    margin: auto;
    line-height: 1.7;
    opacity: 0.9;
}

.bat-card {
    background: rgba(0, 0, 0, 0.7);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.bat-card:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.btn-primary {
    background: linear-gradient(45deg, #0072ff, #00c6ff);
    border: none;
}

.btn-primary:hover {
    box-shadow: 0 0 15px #00c6ff;
}

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.bat-signal {
    font-size: 70px;
    animation: glow 2s infinite alternate;
}

@keyframes glow {
    from {
        text-shadow: 0 0 10px #fff;
    }

    to {
        text-shadow: 0 0 25px #00c6ff, 0 0 50px #0072ff;
    }
}

footer {
    position: relative;
}