* {
    margin: 0;
    padding: 0;
}

.banner {
    background-image: linear-gradient(rgba(0,0,0,0.75), rgba(0,0,0,0.75)),
    url('https://images.homify.com/v1495001963/p/photo/image/2013905/CAM_2_OPTION_1.jpg');
    width: 100%;
    height: 100vh;
    background-size: cover;
    background-position: center;
}

.navbar {
    width: 85%;
    margin: auto;
    padding: 35px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logu {
    width: 120px;
    cursor: pointer;
}

.navbar ul li {
    list-style: none;
    display: inline-block;
    margin: 0 20px;
    position: relative;
}

.navbar ul li a {
    text-decoration: none;
    color: #ffff;
    text-transform: uppercase;
}

.navbar ul li::after {
    content: ' ';
    height: 3px;
    width: 0;
    position: absolute;
    left: 0;
    bottom: -10px;
    background: #009688;
    transition: 0.5s;
}

.navbar ul li:hover::after {
    width: 100%;
}

.content {
    width: 100%;
    text-align: center;
    top: 40%;
    transform: translateY(-50%);
    position: absolute;
    color: #ffff;
}

.content h1 {
    margin-top: 80px;
    font-size: 70px;
}

.content p {
    margin: 20px 0;
    line-height: 25px;
    font-weight: 100;
}

button {
    width: 200px;
    text-align: center;
    padding: 15px 0;
    border-radius: 25px;
    margin: 10px 20px;
    font-weight: bold;
    border: 2px solid #009688;
    background: transparent;
    cursor: pointer;
    color: #ffff;
    position: relative;
    overflow: hidden;
}

span {
    width: 0;
    height: 100%;
    border-radius: 25px;
    left: 0;
    bottom: 0;
    position: absolute;
    z-index: -1;
    transition: 0.5s;
    background: #009688;
}

button:hover span {
    width: 100%;
}

button:hover {
    border: none;
}

/* -------------------- RESPONSIVE DESIGN -------------------- */
@media (max-width: 992px) {
    .navbar {
        flex-direction: column;
        align-items: center;
    }

    .navbar ul {
        margin-top: 20px;
        text-align: center;
    }

    .navbar ul li {
        display: block;
        margin: 10px 0;
    }

    .content h1 {
        font-size: 50px;
    }

    .content p {
        font-size: 16px;
        padding: 0 20px;
    }

    button {
        width: 180px;
        margin: 10px;
    }
}

@media (max-width: 600px) {
    .logu {
        width: 90px;
    }

    .content h1 {
        font-size: 36px;
        margin-top: 60px;
    }

    .content p {
        font-size: 14px;
        line-height: 22px;
        padding: 0 15px;
    }

    .navbar ul {
        text-align: center;
        padding: 0;
    }

    .navbar ul li {
        margin: 8px 0;
    }

    button {
        width: 150px;
        padding: 12px 0;
        font-size: 14px;
    }
}