.signal-echo-loader {
    --signal-echo-size: 112px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: #78756d;
    font: 600 12px/1.3 system-ui, sans-serif;
    text-align: center;
}

.signal-echo-loader--small { --signal-echo-size: 72px; }
.signal-echo-loader--large { --signal-echo-size: 152px; }

.signal-echo-player {
    width: var(--signal-echo-size);
    height: var(--signal-echo-size);
    position: relative;
}

.signal-echo-player::before {
    content: "";
    position: absolute;
    inset: 28%;
    border: 3px solid #dce9e2;
    border-top-color: #0f9d64;
    border-radius: 50%;
    animation: signal-echo-fallback .8s linear infinite;
}

.signal-echo-player.signal-echo-ready::before { display: none; }

.signal-echo-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f7f6f3;
    transition: opacity .18s ease;
}

.signal-echo-overlay[hidden] { display: none; }
.signal-echo-overlay.signal-echo-leaving { opacity: 0; pointer-events: none; }

.signal-echo-inline {
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes signal-echo-fallback { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
    .signal-echo-player::before { animation: none; }
    .signal-echo-overlay { transition: none; }
}