body {
    font-family: Arial, sans-serif;
    background-color: #f7f7f7;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

.container {
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    max-width: 400px;
    width: 100%;
    box-sizing: border-box;
}

h2 {
    text-align: center;
    margin-bottom: 10px;
}


p {
    text-align: center;
    margin-bottom: 15px;
}

/* Left align labels and inputs */
label, input[type="number"], input[type="file"] {
    display: block;
    text-align: left;
    width: 100%;
    margin-bottom: 10px;
}

input[type="number"], input[type="file"] {
    padding: 8px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 10px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
}

button:hover {
    background-color: #0056b3;
}

#message {
    margin-top: 15px;
    font-weight: bold;
    text-align: center;
}

/* ---- Mobile responsiveness ---- */
@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .container {
        padding: 20px 15px;
        max-width: 95%;
    }

    button, input {
        font-size: 1rem;
    }

    h2 {
        font-size: 1.2rem;
    }
}

/* Demo video thumbnail hover effect */
#demo-video-section img {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#demo-video-section img:hover {
    transform: scale(1.05); /* slightly enlarge */
    box-shadow: 0 8px 20px rgba(0,0,0,0.2); /* stronger shadow */
}