.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #000000, #1a1a2e, #000000);
    z-index: -2;
}

.background-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("../../img/AI-twins-background.jpg");
    background-size: cover;
    background-position: center;
    opacity: 0.1;
    z-index: -1;
}

#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.container-main {
    position: relative;
    z-index: 1;
}

/* Đảm bảo text màu trắng hiển thị rõ trên nền */
.text-white {
    color: #fff !important;
}