webfejlesztes/szerkezet/style.css

*{
    box-sizing: border-box;
}

footer{
    background-color: green;
}

nav{
    background-color: yellow;
}
ul{
    text-align: center;
    list-style-type: none;
    inline-size: auto;
}

.icon{

}
#logo2{
    margin-left: 75%;
    margin-top: 0%;
}

.col-1{
    width: 8.33%;
}
.col-2{
    width: 16.66%;
}
.col-3{
    width: 25%;
}
.col-4{
    width: 33.33%;
}
.col-5{
    width: 41.66%;
}
.col-6{
    width: 50%;
}
.col-7{
    width: 58.33%;
}
.col-8{
    width: 66.66%;
}
.col-9{
    width: 75%;
}
.col-10{
    width: 83.33%;
}
.col-11{
    width: 91.66%;
}
.col-12{
    width: 100%;
}

#left {
    background-color: blueviolet;
    float: left;
    width: 25%; 
}
  
article {
    background-color: blue;
    float: left;
    width: 50%; /* The width is 60%, by default */
}
  
#right {
    background-color: red;
    float: left;
    width: 25%; /* The width is 20%, by default */
}