body {
            margin: 0;
            padding: 0;
            font-family: Arial, sans-serif;
            background: #f6f4ea;
            color: #333;
        }

        header {
            background: #2d4739;
            color: white;
            padding: 2rem;
            text-align: center;
        }

        header h1 a{
            margin: 0;
            font-size: 2.5rem;
            text-decoration: none;
            color: white;
        }

        header h1 a:hover{
            margin: 0;
            font-size: 3rem;
            text-decoration: none;
            color: white;
        }

        header p {
            margin-top: 0.5rem;
            font-size: 1.2rem;
        }

        .container {
            max-width: 900px;
            margin: 2rem auto;
            text-align: center;
            padding: 1rem;
        }

        .intro {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            line-height: 1.6;
        }

        .start-btn {
            display: inline-block;
            background: #e6c14d;
            padding: 1rem 2rem;
            border-radius: 10px;
            text-decoration: none;
            font-size: 1.3rem;
            color: #333;
            font-weight: bold;
            transition: 0.3s;
        }

        .start-btn:hover {
            background: #d1ab37;
            transform: scale(1.05);
        }

        .preview {
            margin-top: 3rem;
        }

        .panel-sample {
            width: 80%;
            height: 200px;
            margin: 1rem auto;
            background: white;
            border: 3px solid #2d4739;
            border-radius: 10px;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 1.3rem;
            font-weight: bold;
            color: #2d4739;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        }

        .bd-img {
    width: 80%;
    max-width: 500px;
    border: 3px solid #2d4739;
    border-radius: 10px;
    margin-bottom: 1rem;
}


        .hidden {
    display: none;
}

.bd-container {
    margin-top: 2rem;
    padding: 1.5rem;
    border: 3px solid #2d4739;
    border-radius: 10px;
    background: white;
    text-align: center;
}

.bd-panel {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    padding: 1rem;
}

.next-btn {
    background: #2d4739;
    color: white;
    padding: 0.8rem 1.4rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
}

.next-btn:hover {
    background: #355b49;
}