.marquee {
    font-family: 'Courier New', monospace;
    font-size: 2rem;
    color: #00ff99;
    background: #111;
    padding: 0.5rem 0;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    text-shadow: 0 0 6px #00ff99;
}

.center {
    min-height: calc(100vh - 100px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.panel {
    display: grid;
    gap: 0.75rem;
    text-align: center;
}

.btn {
    font-family: inherit;
    font-size: 1rem;
    padding: 0.6rem 1rem;
    border: 1px solid #333;
    background: #1a1a1a;
    color: #f5f5f5;
    border-radius: 6px;
    cursor: pointer;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.status-row {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 1.5rem;
    justify-content: center;
}

.status-text.ok {
    color: #00c853;
}

.status-text.bad {
    color: #e53935;
}

.device.ok {
    color: #00c853;
}

.device.bad {
    color: #e53935;
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid #bbb;
    border-top-color: #00c853;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: none;
}

.spinner.show {
    display: inline-block;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}