vue-learning/css/kane.css

html {
    --backupground-color: #f7f7f7;
    --btn-color-blue: #307dbe;
    --btn-color-yellow: #f7b24d;
    --btn-color-green: #5bad60;
    --btn-color-red: #e56651;
    --btn-font-color: #fff;
    background-color: #eee;
}

#root,
#app {
    height: 100vh;
    width: 100vw;
    position: fixed;
    padding: 50px;
    /* font-size: 0; */
    overflow: auto;
}

#root,
#app * + * {
    margin-top: 15px;
}

hr {
    background-color: steelblue;
    border: none;
    height: 3px;
}

.test {
    width: 110vw;
    height: 100vh;
    border: 1px solid red;
    overflow: auto;
}

button {
    padding: 5px 10px;
    background-color: var(--btn-color-red);
    color: var(--btn-font-color);
    width: 10em;
    border: none;
    border-radius: 0.25em;
    font-size: 1.5rem;
}

button + button {
    margin-left: 0.5em;
}

button:active {
    background-color: var(--btn-font-color);
    color: var(--btn-color-red);
}

input {
    border: none;
    outline: solid 2px #e56651;
    font-size: 2rem;
}

label {
    display: inline-block;
    font-size: 2rem;
    margin-top: 15px;
}