:root {
    --bg: rgba(40, 40, 40, 0.5);
    --border: rgba(140, 140, 140, 0.5);
}

.Box {
    padding: 4px;
    border-radius: 4px;
    background-color: var(--bg);
    border-color: var(--border);
    border-width: 1px;
    border-style: solid;
}

.triangle-down {
    width: 0;
    height: 0;
    border-left: 280px solid transparent;
    border-right: 280px solid transparent;
    border-top: 200px solid rgba(85, 144, 78, 0.7);
}

.triangle-up {
    width: 0;
    height: 0;
    border-left: 280px solid transparent;
    border-right: 280px solid transparent;
    border-bottom: 200px solid rgba(85, 144, 78, 0.7);
}