*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body{
    height: 100vh;
    background: #15ac01;
}

.navbar{
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    padding: 0 50px;
    background-color: rgba(28, 28, 28, 0.72);
}

.navbar:hover {
    background-color: rgb(28, 28, 28);
    transition: 0.4s;
}

.navbar h2{
    color: #ffffff;
    font-weight: 600;
}

.navbar ul{
    display: flex;
}

.navbar ul li{
    list-style: none;
}

.navbar ul li a{
    text-decoration: none;
    color: #fff;
    font-size: 16px;
    margin-right: 25px;
    transition: color 0.3s ease;
}

.navbar ul li:hover a{
    color: #ffb742;
}

.navbar ul li:last-child a{
    margin: 0;
}

#head-of-introduction{
    margin-top: 50px;
    text-align: center;
    font-size: 32px;
    font-weight: 600;
    color: #fff;
}

#text-of-introduction{
    margin-top: 20px;
    text-align: left;
    padding: 30px;
    font-size: 16px;
    color: #ccc;
}

#hader-introduction{
    margin-top: 50px;
    text-align: center;
    font-size: 32px;
    font-weight: 600;
    color: #fff;
}

#text-introduction{
    margin-top: 20px;
    text-align: left;
    padding: 30px;
    font-size: 16px;
    color: #ccc;
}

footer{
    position: relative;
    background: #1c1c1c;
    padding: 80px 50px 40px;
    margin-top: 100px;
}

footer .start{
    display: flex;
    align-items: center;
    justify-content: space-around;
    position: absolute;
    background-color: #ffb742;
    padding: 30px 25px;
    border-radius: 15px;
    width: 70%;
    top: -16%;
    left: 15%;
}

footer .start p{
    font-size: 13px;
    width: 35%;
}

footer .start button{
    background: transparent;
    border: 1px solid #000;
    cursor: pointer;
    padding: 8px 20px;
    border-radius: 100px;
    transition: all 0.3s ease;
}

footer .start button:hover{
    background-color: #fff;
    border-color: #fff;
}

footer .cols{
    display: flex;
    align-items: start;
}

footer .cols .about-col{
    flex: 3;
}

footer .cols .about-col h3{
    color: #ffb742;
    margin-bottom: 20px;
}

footer .cols .about-col p{
    color: #ccc;
    font-size: 13px;
}

footer .cols .links-col{
    flex: 3;
}

footer .cols .links-col h4, footer .cols .news-col h4{
    color: #fff;
    margin-bottom: 20px;
}

footer .cols .links-col a{
    display: block;
    text-decoration: none;
    color: #7b7b7b;
    font-size: 14px;
    line-height: 26px;
    transition: color 0.3s ease;
}

footer .cols .links-col a:hover{
    color: #ffb742;
}

footer .cols .news-col{
    flex: 3;
}

footer .cols .news-col p{
    color: #7b7b7b;
    font-size: 15px;
}

footer .cols .news-col form{
    width: 100%;
    margin-top: 20px;
    position: relative;
}

footer .cols .news-col form input{
    width: 100%;
    background: #212529;
    border: none;
    padding: 13px;
    border-radius: 100px;
    font-weight: 400;
    font-size: 13px;
}

footer .cols .news-col form button{
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: #ffb742;
    border: none;
    border-radius: 50%;
    position: absolute;
    top: 0;
    right: 0;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

footer .cols .news-col form button:hover{
    background-color: #fb8c00;
}

footer .cols .news-col form button i{
    font-size: 26px;
}

footer .start button a{
    text-decoration: none;
    color: black;
}

@media screen and (max-width: 1100px) {
    .guarantee{
        flex-wrap: wrap;
        gap: 10px;
    }

    .guarantee .item{
        flex-basis: 49%;
    }

    .skills{
        justify-content: space-between;
        gap: 20px;
    }

    .skills .left{
        width: 500px;
    }

    .skills .left .info h3{
        font-size: 22px;
    }

    .skills .left .info p{
        font-size: 12px;
    }

    footer{
        margin-top: 150px;
    }

    footer .start{
        width: 90%;
        left: 5%;
        top: -20%;
    }

    footer .cols{
        flex-wrap: wrap;
    }

    footer .cols .about-col{
        flex-basis: 50%;
    }

    footer .cols .links-col{
        flex-basis: 50%;
    }

    footer .cols .news-col{
        flex-basis: 50%;
    }

}