h1 {
    color: blue;
}

h2 {
    margin-bottom: 50px;
}

/* some default styles for every paragraph - may be overridden below */
p {
    margin-bottom: 20px;
    padding: 20px;
    border: 1px solid black;
}

/* borders */

.border-1 {
    border: 1px solid orange;
}
.border-2 {
    border-top-style: solid;
    border-right-style: dashed;
    border-bottom-style: groove;
    border-left-style: ridge;

    border-top-width: 10px;
    border-right-width: 50px;
    border-bottom-width: 20px;
    border-left-width: 30px;

    border-top-color: blue;
    border-right-color: red;
    border-bottom-color: green;
    border-left-color: orange;
}
.border-3 {
    border: 6px dotted black;
}


/* border-radius */

.border-radius-1 {
    border-radius: 10px;
}
.border-radius-2 {
    border-radius: 300px 10px 50px 0px;
}
.border-radius-3 {
    border-radius: 50%;
}

/* margin */

.margin-1 {
    /* apply to all sides */
    margin: 20px;
}
.margin-2 {
    /* apply to individual sides */
    margin-top: 50px;
    margin-right: 30px;
    margin-bottom: 10px;
    margin-left: 80px;
}
.margin-3 {
    /* apply to individual sides - shorthand version */
    margin: 50px 30px 10px 80px;
}

/* padding */

.padding-1 {
    /* apply to all sides */
    padding: 20px;
}
.padding-2 {
    /* apply to individual sides */
    padding-top: 50px;
    padding-right: 30px;
    padding-bottom: 10px;
    padding-left: 80px;
}
.padding-3 {
    /* apply to individual sides - shorthand version */
    padding: 50px 30px 10px 80px;
}

/* centre-aligned content */

.centre {
    width: 50%;
    margin-left: auto;
    margin-right: auto;
}