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

body {
    height: 100vh;
    font-family: 'Segoe UI', sans-serif;
    background:
        linear-gradient(rgba(0, 0, 0, .65),
            rgba(0, 0, 0, .75)),
        url('https://images.unsplash.com/photo-1553877522-43269d4ea984') center/cover fixed;
    color: white;
}

.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.logo {
    font-size: 70px;
    font-weight: 800;
    letter-spacing: -2px;
    background: linear-gradient(90deg, #00d4ff, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 28px;
    font-weight: 300;
    margin-top: 20px;
}

.desc {
    margin-top: 25px;
    font-size: 17px;
    color: #ddd;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.btn-custom {
    margin-top: 35px;
    padding: 14px 35px;
    border-radius: 50px;
    background: linear-gradient(90deg, #00d4ff, #8b5cf6);
    color: white;
    font-weight: 600;
    border: none;
    transition: .3s;
}

.btn-custom:hover {
    transform: translateY(-5px);
    opacity: .9;
}

.footer {
    position: absolute;
    bottom: 25px;
    width: 100%;
    text-align: center;
    color: #aaa;
    font-size: 14px;
}


@media(max-width:768px) {

    .logo {
        font-size: 45px;
    }

    .tagline {
        font-size: 20px;
    }

    .desc {
        padding: 0 20px;
    }
}