:root {
    --primary: #00f2ff;
    --glass: rgba(20, 20, 20, 0.6);
    --border: rgba(255, 255, 255, 0.1);
}

body {
    margin: 0;
    overflow: hidden;
    background-color: #050505;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    color: white;
}

#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Hidden video element for MediaPipe processing */
#input-video {
    position: absolute;
    width: 0;
    height: 0;
    opacity: 0;
}

/* UI Overlay Layer */
#ui-layer {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 15px;
    pointer-events: none; /* Let clicks pass through where not buttons */
}

.panel {
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 15px;
    border-radius: 12px;
    border: 1px solid var(--border);
    pointer-events: auto;
    width: 260px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    transition: transform 0.2s;
}

.panel:hover {
    transform: translateY(-2px);
}

h2 {
    margin: 0 0 10px 0;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary);
}

.btn-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

button {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    color: #eee;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 12px;
}

button:hover, button.active {
    background: var(--primary);
    color: #000;
    font-weight: bold;
}

.control-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px;
}

input[type="color"] {
    border: none;
    width: 40px;
    height: 25px;
    cursor: pointer;
    background: none;
}

#status {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    background: var(--glass);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 12px;
    color: #aaa;
    border: 1px solid var(--border);
    backdrop-filter: blur(5px);
}

#camera-preview {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 160px;
    height: 120px;
    z-index: 10;
    border-radius: 10px;
    border: 2px solid var(--border);
    background: #000;
    overflow: hidden;
    transform: scaleX(-1); /* Mirror effect */
}

#camera-preview canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 20;
    font-size: 24px;
    font-weight: 300;
    text-align: center;
    pointer-events: none;
}