* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    background: #111;
    color: #e0e0e0;
    min-height: 100dvh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hidden {
    display: none !important;
}

/* Landing */
#landing {
    text-align: center;
    padding: 2rem;
}

#landing h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

#landing p {
    color: #888;
    margin-bottom: 2rem;
}

#landing button {
    display: block;
    width: 100%;
    max-width: 300px;
    margin: 0.75rem auto;
    padding: 1.25rem;
    font-size: 1.2rem;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
}

#btn-send {
    background: #2ecc71;
    color: #111;
}

#btn-receive {
    background: #3498db;
    color: #fff;
}

/* Sender */
#sender {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    width: 100%;
    max-width: 500px;
}

#sender-preview {
    width: 100%;
    max-height: 50vh;
    border-radius: 8px;
    background: #000;
    object-fit: cover;
}

#sender-info {
    text-align: center;
    margin: 1rem 0;
}

#room-code {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    font-family: monospace;
    margin-bottom: 1rem;
}

#qr-code canvas {
    border-radius: 8px;
}

#btn-flip-camera {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    background: #555;
    color: #fff;
    cursor: pointer;
    margin-top: 0.5rem;
}

/* Status */
.status {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.status.waiting { color: #f1c40f; }
.status.connected { color: #2ecc71; }
.status.error { color: #e74c3c; }

/* Receiver connect form */
#receiver-connect {
    text-align: center;
    padding: 2rem;
}

#receiver-connect label {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

#room-input {
    font-size: 1.5rem;
    padding: 0.75rem 1rem;
    border: 2px solid #555;
    border-radius: 8px;
    background: #222;
    color: #fff;
    text-align: center;
    letter-spacing: 0.1em;
    font-family: monospace;
    width: 100%;
    max-width: 300px;
}

#btn-connect {
    display: block;
    margin: 1rem auto;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border: none;
    border-radius: 8px;
    background: #3498db;
    color: #fff;
    cursor: pointer;
    font-weight: 600;
}

/* Stereo view */
#stereo-view {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
}

#stereo-videos {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
}

#stereo-videos video {
    width: 50%;
    height: 100%;
    object-fit: cover;
}

/* Scale controls */
#scale-controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    background: rgba(0, 0, 0, 0.6);
    padding: 8px 16px;
    border-radius: 12px;
}

#scale-slider {
    width: 200px;
    height: 30px;
    cursor: pointer;
    accent-color: #3498db;
}

/* Play overlay */
#play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(0, 0, 0, 0.7);
    z-index: 10;
    cursor: pointer;
}

#play-button {
    font-size: 2rem;
    color: #fff;
    background: rgba(255, 255, 255, 0.15);
    padding: 1.5rem 3rem;
    border-radius: 16px;
}

/* Debug panel */
#debug-toggle {
    position: fixed;
    top: 4px;
    right: 4px;
    z-index: 9999;
    background: rgba(255, 0, 0, 0.5);
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    cursor: pointer;
}

#debug-panel {
    position: fixed;
    top: 28px;
    right: 4px;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.9);
    color: #0f0;
    font-size: 0.6rem;
    max-width: 90vw;
    max-height: 60vh;
    overflow: auto;
    padding: 8px;
    border-radius: 8px;
}

#debug-panel button {
    font-size: 0.7rem;
    margin-right: 4px;
    margin-bottom: 4px;
}

#debug-log {
    white-space: pre-wrap;
    word-break: break-all;
    margin: 0;
}