body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: url(bg.jpeg);
    font-size: 15px;
    line-height: 1.5;
    padding: 0;
    margin: 0;
    background-size: cover;
    background-position: center;
}
* {
    box-sizing: border-box;
}
.container {
    width: 520px;
    height: auto;
    margin: 100px auto;
    background-color: #eee;
    border-radius: 0px;
}
.base {
    width: 100%;
    margin: 0;
    overflow: hidden;
    display: block;
    float: none;
}
.block {
    width: 135px;
    padding: 5px 20px;
    margin-left: 20px;
    display: inline-block;
    float: left;
}
.base h4 {
    font-size: 26px;
    text-align: center;
    font-family: sans-serif;
    font-weight: normal;
    margin-top: 0px;
    box-shadow: 0px 2px #bababa;
    background: white;
    font-size: 34px;
    color: navy;
}
.title {
    font-size: 20px;
    text-align: left;
    font-family: sans-serif;
    font-weight: normal;
    line-height: 0.5;
    letter-spacing: 0.5px;
    word-spacing: 2.7px;
    color: navy;
}
input[type="text"] {
    width: 140px;
    margin: auto;
    outline: none;
    min-height: 50px;
    border: 2px solid navy;
    padding: 12px;
    background-color: #f7f7f7;
    border-radius: 2px;
    color: navy;
    font-size: 17px;
    border-radius: 7%;
}
input[type="text"]:focus {
    background-color: #ffffff;
    border: 2px solid rgb(255, 30, 0);
    outline: none;
}
input[type="button"] {
    width: 150px;
    margin-left: 35%;
    margin-top: 40px;
    outline: none;
    border: none;
    border-radius: 2px;
    background-color: navy;
    color: #ffffff;
    padding: 14px 16px;
    text-align: center;
    font-size: 16px;
}
input[type="button"]:hover {
    background-color: navy;
    border-radius: 7%;
}
#age {
    display: block;
    margin: 10px;
    margin-top: 35px;
    padding: 10px;
    padding-bottom: 20px;
    overflow: hidden;
    font-family: verdana;
    font-size: 23px;
    font-weight: normal;
    line-height: 1.5;
    word-spacing: 2.7px;
    color: navy;
} 
@media screen and (max-width: 500px){

      .container{
        width: 300px;
        align-content: center;
      }
    }