img{
    width: 190px;
}

header{
    background-color:#f5f5f5;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 50px;
    width: 930px;
    margin: 0 auto;
    border-top: 20px solid #d5d5d5;
}

nav ul{
    padding-top: 24px;
    text-align: center;
}

nav ul li{
    display: inline;
    margin: 0 20px;
}
nav ul li a{
    display: inline;
    font-size: 18px;
    font-family: 'Tahoma';
    text-decoration: none;
    color: #9a9a9a;
    font-size: 18px;
    transition: 0.3s;
    background-color: #f5f5f5;
}
nav ul li a:hover{
    color:#9e9e9e;
    font-size: 19px;
    font-weight: 700;
}

h2{
    font-size: 24px;
    font-family: 'Tahoma';
}

h3{
    font-size: 20px;
    font-family: 'Tahoma';
}

div{
    background-color: #f5f5f5;
    padding: 50px;
    width: 930px;
    margin: 0 auto;
    border-top: 20px solid #d5d5d5;
    text-align: center;
}

p{
    text-align: center;
    line-height: 28px;
    font-family: 'Tahoma';
}

a{
    background-color: green;
    font-size: 14px;
    font-weight: bold;
    text-decoration: none;
    color: #fff;
    padding: 8px 15px;
    border-radius: 20px;
}

span{font-weight: bold;}