.sphere-layout {
    display: grid;
    grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}

.sphere-sidebar,
.sphere-workspace {
    display: grid;
    gap: 18px;
    min-width: 0;
}

.sphere-control-grid {
    display: grid;
    gap: 12px;
}

.sphere-radius-row,
.sphere-layer-controls,
.sphere-layer-copy-grid,
.sphere-projection-grid,
.sphere-help-grid,
.sphere-stat-grid {
    display: grid;
    gap: 12px;
}

.sphere-radius-row {
    grid-template-columns: minmax(0, 1fr) 96px;
    align-items: end;
}

.sphere-layer-controls {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
}

.sphere-layer-copy-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sphere-projection-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sphere-projection-card,
.sphere-layer-card {
    display: grid;
    gap: 10px;
}

.sphere-projection-card h3,
.sphere-layer-card h3 {
    margin: 0;
    font-size: 1rem;
    color: var(--text-strong);
}

.sphere-canvas-frame {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 220px;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    background:
        linear-gradient(45deg, rgba(15, 23, 42, 0.96) 25%, rgba(30, 41, 59, 0.94) 25%, rgba(30, 41, 59, 0.94) 50%, rgba(15, 23, 42, 0.96) 50%, rgba(15, 23, 42, 0.96) 75%, rgba(30, 41, 59, 0.94) 75%);
    background-size: 18px 18px;
}

#sphereTopCanvas,
#sphereFrontCanvas,
#sphereLayerCanvas {
    display: block;
    max-width: 100%;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

#sphereTopCanvas,
#sphereFrontCanvas {
    width: min(100%, 260px);
    aspect-ratio: 1;
}

#sphereLayerCanvas {
    width: min(100%, 560px);
    aspect-ratio: 1;
}

.sphere-layer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
    gap: 16px;
    align-items: start;
}

.sphere-text-output {
    margin: 0;
    min-height: 280px;
    max-height: 520px;
    overflow: auto;
    padding: 14px 16px;
    border-radius: 8px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    background: rgba(15, 23, 42, 0.64);
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.45;
    white-space: pre;
}

.sphere-stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sphere-stat-card {
    padding: 12px 14px;
    border-radius: 8px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(15, 23, 42, 0.5);
}

.sphere-stat-card strong,
.sphere-stat-card span {
    display: block;
}

.sphere-stat-card strong {
    font-size: 1rem;
    color: var(--text-strong);
}

.sphere-stat-card span {
    margin-top: 4px;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.sphere-shape-note,
.sphere-helper-note {
    color: var(--text-dim);
    font-size: 0.92rem;
    line-height: 1.6;
    margin: 0;
}

.sphere-layer-label {
    justify-self: center;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.56);
    border: 1px solid rgba(148, 163, 184, 0.18);
    color: var(--text-strong);
    font-size: 0.92rem;
    font-weight: 600;
}

.sphere-help-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sphere-help-grid .resource-card {
    min-height: 100%;
}

@media (max-width: 980px) {
    .sphere-layout,
    .sphere-layer-grid,
    .sphere-projection-grid,
    .sphere-help-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .sphere-radius-row,
    .sphere-layer-copy-grid,
    .sphere-stat-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 640px) {
    .sphere-layer-controls {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .sphere-layer-label {
        grid-column: 1 / -1;
        justify-self: stretch;
        text-align: center;
    }
}