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

#canvas-container {
    width: 100vw;
    height: 100vh;
    display: block;
}

/* Painel com Glassmorphism */
#ui-container {
    position: absolute;
    top: 50%;
    right: 40px;
    transform: translateY(-50%);
    z-index: 10;
}

.panel {
    background: rgba(20, 20, 20, 0.6); /* Transparente escuro */
    backdrop-filter: blur(12px); /* Efeito Vidro Fosco (Glassmorphism) */
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    padding: 25px;
    border-radius: 12px;
    width: 260px;
    color: white;
}

.panel h2 {
    margin: 0 0 5px 0;
    font-size: 18px;
    font-weight: 600;
}

.panel p {
    margin: 0 0 20px 0;
    font-size: 12px;
    color: #bbb;
}

.color-options {
    display: flex;
    gap: 10px;
}

.color-btn {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.2);
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s;
}

.color-btn:hover {
    transform: scale(1.1);
    border-color: #fff;
}

.menu-btn {
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    transition: background 0.2s, border-color 0.2s;
    margin-top: 5px;
}

.menu-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}