style.css

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

:root {
    --primary-color: rgba(235, 56, 2, 0.897);
}


/* navbar section starts  */

#navbar {
    min-height: 100vh;
    width: 100%;
    background-image: linear-gradient(rgba(7, 12, 29, 0.479), rgba(7, 11, 29, 0.445)), url(images/bg2.jpg);
    background-position: center;
    background-size: cover;
    position: relative;
}

.text-box {
    width: 90%;
    color: #fff;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.text-box h1 {
    font-weight: 400;
    font-size: 53px;
    line-height: 6rem;
}

.text-box p {
    font-size: 18px;
    margin: 10px 0 40px;
}

.hero-btn {
    display: inline-block;
    text-decoration: none;
    color: #fff;
    border: 1px solid #fff;
    padding: 12px 34px;
    font-size: 15px;
    background: transparent;
    position: relative;
    cursor: pointer;
    border-radius: 3px;
}

.hero-btn::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0%;
    height: 100%;
    background: var(--primary-color);
    transition: .3s linear;
    z-index: -1;
}

.hero-btn:hover:before {
    width: 100%;
    left: 0;
}

.hero-btn:hover {
    border: 1px solid var(--primary-color);
    color: #fff;
}


/* media query  */

@media screen and (max-width: 496px) {
    .text-box h1 {
        margin-top: 30%;
        line-height: 4rem;
    }
}