body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: radial-gradient(circle at center, #1b2038 0%, #050510 100%);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}
#canvas-container {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}
#ui-container {
    position: absolute;
    top: 24px;
    right: 24px;
    z-index: 10;
    background: rgba(20, 25, 40, 0.65);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 280px;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
    transition: opacity 0.3s ease;
}
h2 {
    margin: 0;
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}
.control-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
label {
    font-size: 0.75rem;
    color: #aeb5c2;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    font-weight: 500;
}
.btn-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.btn-full {
    grid-column: 1 / -1;
}
button {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #e0e0e0;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
}
button:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    color: #ffffff;
    transform: translateY(-1px);
}
button.active {
    background: rgba(0, 210, 255, 0.2);
    border-color: #00d2ff;
    color: #00d2ff;
    box-shadow: 0 0 15px rgba(0, 210, 255, 0.3);
}
input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 100%;
    height: 48px;
    border-radius: 8px;
    cursor: pointer;
    background: none;
    padding: 0;
    transition: transform 0.2s;
}
input[type="color"]:hover {
    transform: scale(1.02);
}
input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}
input[type="color"]::-webkit-color-swatch {
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
}
#status-container {
    padding: 12px 14px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    border-left: 3px solid #ffaa00;
    display: flex;
    align-items: center;
}
#status {
    font-size: 0.85rem;
    color: #ffaa00;
    line-height: 1.4;
    font-weight: 500;
    margin: 0;
}

/* Video element must exist but be hidden */
#video-element {
    display: none;
}