body {
    background: #1a2332;
    color: #ecf0f1;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 52px 1rem 1.5rem; /* top: game-page fixed navbar */
    min-height: 100dvh;
    text-align: center;
    box-sizing: border-box;
}

main h1 {
    font-size: clamp(1.2rem, 4vw, 1.75rem);
    margin: 0 0 1rem;
}

#spectrumCanvas {
    display: block;
    margin: 0 auto 1rem;
    max-width: 100%;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius);
    background: #2c3e50;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 0.75rem;
}

.spectrum-btn {
    padding: 0.6rem 1.2rem;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.1);
    color: #ecf0f1;
    font: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    min-height: 44px;
    transition: background 0.15s;
}

.spectrum-btn:hover:not(:disabled) {
    background: rgba(255,255,255,0.2);
}

.spectrum-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

#status,
#timer {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.7);
    margin: 0.25rem 0;
    min-height: 1.4em;
}