body {
    margin-left: 2%;
    background: #666;
}

.V-center {
    text-align: center;
}
.cant-select {
    user-select: none;
}
.cant-scrool {
    overflow: hidden;
}
.cant-zoom {
    touch-action: none;
}
.tab {
    margin-left: 4%;
}

h1 {
    color: #2e2;
}
h2 {
    color: #6ee;
}
h3 {
    color: #33e;
}
h4 {
    color: #dd6;
}

p {
    color: #bbe;
}

a:not(:visited) {
    color: #ee7;
}
a:visited {
    color: #77e;
}

button {
    padding-top: 2px;
    padding-bottom: 2px;
    border: 2px solid #222;
    background: #ddd;
    border-radius: 7px;
    padding-left: 7px;
    padding-right: 7px;
}
button:active {
    border-color: #555;
}

details{
    font-size: 20px;
    font-weight: bold;
    color: #e3e;
}
summary {
    cursor: pointer;
    font-weight: bold;
    list-style: none;
}
.content {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
}
details[open] .content {
    max-height: 200px;
    opacity: 1;
}

table{
    background-color: #bbb;
}
th{
    color: #344;
}