body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background: #000;
    font-family: Arial, sans-serif;
}

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

.controls {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    gap: 10px;
}

.tool-btn, #freezeBtn, #analyticsBtn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    cursor: pointer;
    backdrop-filter: blur(5px);
    transition: background 0.3s;
}

.tool-btn:hover, #freezeBtn:hover, #analyticsBtn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.tool-btn.active {
    background: rgba(255, 255, 255, 0.4);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 3;
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 20px;
    border-radius: 10px;
    width: 80%;
    max-width: 600px;
}

.close {
    position: absolute;
    right: 20px;
    top: 10px;
    font-size: 24px;
    cursor: pointer;
}

#analyticsChart {
    width: 100%;
    height: 300px;
}