html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
    background: #000005;
    color: #eee;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

#display {
    position: absolute;
    inset: 0;
    cursor: grab;
    touch-action: none;   /* the engine owns pinch/pan; without this the browser eats them */
}

#display:active {
    cursor: grabbing;
}

#display canvas {
    position: absolute;
    top: 0;
    left: 0;
}

#hud {
    position: absolute;
    left: 16px;
    bottom: 14px;
    background: rgba(0, 0, 10, 0.55);
    border-radius: 8px;
    backdrop-filter: blur(3px);
    pointer-events: none;
    user-select: none;
    max-width: 26rem;
}

#hud button {
    pointer-events: auto;
    font: inherit;
    color: inherit;
    background: none;
    border: none;
    cursor: pointer;
}

#menu-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
}

#menu-bar #status {
    margin-left: 4px;
}

#burger {
    font-size: 1.05rem;
    color: #9ac;
    padding: 2px 4px;
    line-height: 1;
}

#burger:hover {
    color: #fff;
}

#menu-panel {
    padding: 10px 14px 6px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

#tabs {
    display: flex;
    flex-direction: column;   /* domains stack: Atmosphere, then Ocean below it */
    align-items: flex-start;
    gap: 6px;
    margin-bottom: 8px;
}

.tab {
    font-size: 0.72rem !important;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #789 !important;
    padding: 3px 10px !important;
    border: 1px solid rgba(255, 255, 255, 0.15) !important;
    border-radius: 4px;
}

.tab:hover {
    color: #cde !important;
}

.tab.active {
    color: #fff !important;
    background: rgba(255, 255, 255, 0.12) !important;
    border-color: rgba(255, 255, 255, 0.35) !important;
}

.tab-body {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 2px;   /* #tabs' column gap provides the rest of the spacing */
}

.tab-body[hidden] {
    display: none;    /* author display:flex otherwise beats the hidden attribute */
}

.layer {
    font-size: 0.72rem !important;
    color: #9ab !important;
    padding: 2px 8px !important;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05) !important;
}

.layer.active {
    color: #ffd580 !important;
    background: rgba(255, 213, 128, 0.12) !important;
}


#hud a {
    pointer-events: auto;
    color: #8ab4ff;
    text-decoration: none;
}

#hud a:hover {
    text-decoration: underline;
}

#hud h1 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.12em;
}

#hud p {
    margin: 2px 0;
    font-size: 0.72rem;
    color: #bcd;
}

#data-date {
    color: #89a;
}

.scale-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 6px 0 !important;
}

#scale {
    border-radius: 2px;
    display: block;
}

.scale-labels {
    font-size: 0.65rem;
    color: #89a;
    white-space: nowrap;
}

#location {
    color: #ffd580 !important;
    min-height: 1em;
}

#status {
    color: #6c8 !important;
    min-height: 1em;
}

.credit {
    color: #567 !important;
    font-size: 0.62rem !important;
    margin-top: 6px !important;
}