body {
    color: #1F1F1F;
}
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh; 
    height: calc(100 * var(--vh, 1vh));
    z-index: -1;
    overflow: hidden;
}
#canvas-container canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    transform: translate3d(0,0,0);
}
#main-content {
    position: relative;
    z-index: 1;
}
.panel {
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    background: rgba(255, 255, 255, 0.2);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
}

.btn {
    background: #2E1C66;
    color: white;
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    display: inline-block;
    transition: transform 0.2s, opacity 0.2s;
}

.btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}