body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background: #ffffff;
    font-family: 'Inter', sans-serif;
    height: 100vh;
    width: 100vw;
}

#ui-overlay {
    position: fixed;
    top: 30px;
    left: 30px;
    z-index: 1000;
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: white;
    border: 1px solid #eaeaea;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 700;
    color: #222;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
    transition: all 0.2s ease;
}

.upload-btn:hover {
    background: #fafafa;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.subtitle {
    margin: 15px 0 0 10px;
    font-size: 11px;
    letter-spacing: 1.5px;
    color: #999;
    font-weight: 700;
}

#gallery-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
}

.picture-frame {
    position: absolute;
    /* using will-change for smoother dragging */
    will-change: left, top;
}

.picture-frame.grabbed {
    z-index: 1000 !important;
}

.picture-frame.grabbed img {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    transform: scale(1.05);
    transition: transform 0.2s, box-shadow 0.2s;
}

.picture-frame img {
    max-width: 350px;
    height: auto;
    display: block;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    border-radius: 2px;
    pointer-events: auto; /* Required for elementFromPoint */
    transition: transform 0.2s, box-shadow 0.2s;
}

.finger-cursor {
    position: fixed;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: rgba(0, 150, 255, 0.7);
    border: 3px solid white;
    pointer-events: none; /* Do not block hits */
    z-index: 9999;
    transform: translate(-50%, -50%);
    display: none;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: background-color 0.15s, transform 0.15s, border-color 0.15s;
}

.finger-cursor.pinched {
    background-color: rgba(255, 80, 80, 0.9);
    transform: translate(-50%, -50%) scale(1.3);
    border-color: #fff;
}

#camera-container {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 320px;
    height: 180px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    z-index: 100;
    background: #000;
}

#camera-feed, #camera-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1); /* mirror */
}