margin-vs-padding/style.css

body {
    --bg: #fff;
    --fg: #000;
    --margin-color: #ad8052;
    --border-color: #e3c381;
    --padding-color: #b7c47f;
    --element-color: #87b2bc;
}
body.dark {
    --bg: #2b2a33;
    --fg: #eee;
    --margin-color: #926538;
    --border-color: #b39355;
    --padding-color: #7b8653;
    --element-color: #709aa3;
}

:root {
    width: 100%;
    height: 100%;
}

body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    font-family: sans-serif;

    --accent-color: #4a93d1;

    --width: 130px;
    --height: 50px;

    --margin-top: 10px;
    --margin-left: 10px;
    --margin-right: 10px;
    --margin-bottom: 10px;

    --border-top: 2px;
    --border-left: 2px;
    --border-right: 2px;
    --border-bottom: 2px;

    --padding-top: 5px;
    --padding-left: 5px;
    --padding-right: 5px;
    --padding-bottom: 5px;

    background-color: var(--bg);
    color: var(--fg);
    transition:
        color 0.4s ease 0s,
        background-color 0.4s ease 0s;
}

.example-wrapper {
    margin: 5px;
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.margin { background: var(--margin-color); }
.border { background: var(--border-color); }
.padding { background: var(--padding-color); }
.element { background: var(--element-color); }

.description {
    position: absolute;
    top: 0;
    left: 5px;
    font-size: 0.8rem;
}

.offsets-vert {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.offsets-vert > span {
    padding: 5px 0;
}

.offsets-horiz {
    display: flex;
    flex-direction: row;
    align-items: center;
}
.offsets-horiz > span {
    padding: 0 8px;
}

.example.wrapper:not(.hidden) .margin,
.example-wrapper:not(.hidden) .padding { border: 1px dashed var(--fg); }
.example-wrapper:not(.hidden) .border,
.example-wrapper:not(.hidden) .element { border: 1px solid var(--fg); }

.example-wrapper.hidden .offsets-vert > span,
.example-wrapper.hidden .offsets-horiz > span {
    display: none;
}

.example-wrapper.hidden .padding {
    background: var(--margin-color);
}

.example-wrapper.hidden .element {
    margin-top: var(--margin-top);
    margin-left: var(--margin-left);
    margin-right: var(--margin-right);
    margin-bottom: var(--margin-bottom);

    border-color: var(--border-color);
    border-style: solid;
    border-top-width: var(--border-top);
    border-left-width: var(--border-left);
    border-right-width: var(--border-right);
    border-bottom-width: var(--border-bottom);
    
    padding-top: var(--padding-top);
    padding-left: var(--padding-left);
    padding-right: var(--padding-right);
    padding-bottom: var(--padding-bottom);
}

.element {
    width: var(--width);
    height: var(--height);
    display: flex;
    justify-content: center;
    align-items: center;
}

.controls-wrapper {
    display: flex;
    flex-direction: column;
    margin: 5px;
}

.controls {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 5px;
}

.controls-column {
    display: flex;
    flex-direction: column;
}

.control {
    display: grid;
    grid-template-columns: 1fr 2fr;
}

.switches {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}

input[type=range] {
    width: 10rem;
}

input[type=checkbox] {
    display: none;
}
input[type=checkbox] ~ label {
    display: flex;
    flex-direction: row;
    cursor: pointer;
}
input[type=checkbox] ~ label > span {
    margin-left: 5px;
}
input[type=checkbox] ~ label::before {
    content: '';
    width: 2rem;
    height: 1rem;
    border-radius: 5px;
    background:    -moz-linear-gradient(90deg, #777 50%, #bbb 51%);
    background: -webkit-linear-gradient(90deg, #777 50%, #bbb 51%);
    background:         linear-gradient(90deg, #777 50%, #bbb 51%);
}
input[type=checkbox]:checked ~ label::before {
    content: '';
    width: 2rem;
    height: 1rem;
    border-radius: 5px;
    background:    -moz-linear-gradient(270deg, var(--accent-color) 50%, #bbb 51%);
    background: -webkit-linear-gradient(270deg, var(--accent-color) 50%, #bbb 51%);
    background:         linear-gradient(270deg, var(--accent-color) 50%, #bbb 51%);
}

textarea {
    display: none;
}
textarea.show {
    display: block;
}