body {
            font-family: 'Noto Sans JP', sans-serif;
            background-color: #f9f9f9;
            max-width: 800px;
            margin: auto;
            padding: 20px;
            color: #333;
        }

        h1 {
            text-align: center;
            font-size: 24px;
            font-weight: 700;
            color: #444;
        }

        .container {
            background: #fff;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        .logo {
            color: #d32f2f;
            font-weight: bold;
            font-size: 36px;
            text-align: center;
            margin-bottom: 10px;
        }

        .warning {
            color: #d32f2f;
            font-weight: bold;
            font-size: 18px;
            text-align: center;
            margin-bottom: 15px;
        }

        .consent-box {
            border-left: 5px solid #d32f2f;
            padding: 15px;
            background-color: #fafafa;
            border-radius: 5px;
            line-height: 1.8;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }

        .consent-box a {
            color: #d32f2f;
            text-decoration: none;
        }

        .consent-box a:hover {
            text-decoration: underline;
        }

        .checkbox-container {
            text-align: center;
            margin-top: 20px;
        }

        .checkbox-container label {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 16px;
            cursor: pointer;
            justify-content: center;
        }

        input[type="checkbox"] {
            width: 18px;
            height: 18px;
            accent-color: #d32f2f;
        }

        .btn-container {
            text-align: center;
            margin-top: 20px;
        }

        button {
            padding: 12px 24px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            background: linear-gradient(135deg, #d32f2f, #b71c1c);
            border: none;
            border-radius: 5px;
            color: #fff;
            transition: 0.3s;
            display: inline-block;
        }

        button:disabled {
            background: #ccc;
            cursor: not-allowed;
        }

        button:hover:not(:disabled) {
            background: linear-gradient(135deg, #b71c1c, #880e4f);
            transform: scale(1.05);
        }

        .device-info {
            font-size: 17px;
            color: #555;
            font-weight: bold;
            margin-bottom: 10px;
        }