html,
body {
    height: 100%;
}

body {
    background-color: #4d4d4d;
    padding: 0;
    margin: 0;
    color: white;
    font-size: 16px;
}

.content {
    display: flex;
    justify-content: center;
}

.web {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-end;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    padding: 8px;
    gap: 8px;
}

.web>span {
    text-align: center;
}

.fixed-size {
    width: 176px;
    height: 246px;
}

.icon {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.icon img {
    max-width: 128px;
    max-height: 128px;
}

.icon img.animate {
    animation: icon-spin infinite 20s linear;
}

button {
    background-color: #2e2e2e;
    border: black;
    color: white;
    padding: 8px;
    cursor: pointer;
    border-radius: 4px;
}

button:hover {
    background-color: #414141;
}

button:active {
    background-color: #1f1f1f;
}

@keyframes icon-spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}