/* ============================================================
   Universe of Us — Layout
   ============================================================ */
#app-container {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
}

#canvas-container {
    position: fixed;
    inset: 0;
    z-index: 1;
}

#canvas-container canvas {
    width: 100% !important;
    height: 100% !important;
}

#ui-overlay {
    position: fixed;
    inset: 0;
    z-index: 10;
    pointer-events: none;
}

#ui-overlay>* {
    pointer-events: auto;
}

.star-label {
    position: absolute;
    font-family: var(--font-heading);
    font-size: 0.7rem;
    color: var(--color-text);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.6), 0 0 20px rgba(255, 215, 0, 0.3);
    pointer-events: none;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
    white-space: nowrap;
    text-align: center;
}

.star-label.visible {
    opacity: 1;
    transform: translateY(0);
}

.star-label.north-star-label {
    font-size: 1rem;
    color: var(--color-accent-gold);
    opacity: 1;
    transform: translateY(0);
    letter-spacing: 3px;
    text-transform: uppercase;
    animation: northStarLabelFloat 4s ease-in-out infinite;
}

@keyframes northStarLabelFloat {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-4px);
    }
}