body {
            margin: 0;
            height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            overflow: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            background:
                radial-gradient(circle at 20% 20%, #3a3a5a, transparent 40%),
                radial-gradient(circle at 80% 30%, #5a3a3a, transparent 45%),
                radial-gradient(circle at 50% 80%, #3a5a4a, transparent 45%),
                #111;
            filter: blur(28px);
            transform: scale(1.1);
            z-index: -1;
        }
        .box {
            background: #211e31;
            padding: 30px;
            border-radius: 28px;
            width: min(94vw, 450px);
            text-align: center;
            box-shadow: 0 20px 50px rgba(0,0,0,0.7);
            border: 1px solid rgba(255,255,255,0.05);
        }
        h2 {
            margin-top: 0;
            font-weight: 600;
            font-size: 24px;
            color: #ececec;
        }
        p {
            color: #aaa;
            font-size: 15px;
            margin-bottom: 25px;
        }
        canvas {
            display: block;
            margin: 0 auto;
            touch-action: none;
            cursor: pointer;
            -webkit-tap-highlight-color: transparent;
        }
        .status-msg {
            margin-top: 15px;
            font-size: 14px;
            min-height: 20px;
        }