html {
    min-width: auto;
}

.buttons.grid {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    
    justify-content: center;
    align-items : center;
}

.buttons.grid .button {
    flex: 1 0 20%;
    margin: 10px;
    padding: 40px 20px;
    line-height: 0px;
}

.buttons.grid .complex-button {
    flex: 1 0 34%;
    margin: 15px 10px;
}

.section {
    padding-top: 1rem;
}

#dev-mode {
    background: #d23f31;
    border: 1px solid #3e2723;
    box-shadow: 0 0 4px rgba(0,0,0,.14), 0 2px 4px rgba(0,0,0,.28);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    right: 20px;
    line-height: 18px;
    margin: -9px -50px;
    opacity: .87;
    position: absolute;
    text-align: center;
    text-shadow: 1px 1px 0 #4e342e;
    top: 20px;
    transform: rotate(45deg);
    width: 100px;
    z-index: 99;
    cursor: pointer;
}

.hidden {
    display: none;
}