/* General Styling */
body {
    font-family: 'Arial', sans-serif;
    background: #f4f4f4;
    color: #333;
    text-align: center;
    margin: 0;
    padding: 20px;
}

/* Container */
.container {
    max-width: 500px;
    margin: auto;
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Headings */
h1 {
    color: #4A90E2;
}

p {
    color: #666;
}

/* Join Room Box */
.join-box {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.join-box input {
    flex: 1;
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.join-box button {
    background: #4A90E2;
    color: white;
    padding: 10px 15px;
    font-size: 16px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
    transition: 0.3s;
}

.join-box button:hover {
    background: #357ABD;
}

/* Generate Room ID Button */
.generate-btn {
    background: #ff9800;
    color: white;
    padding: 10px 15px;
    font-size: 16px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
    transition: 0.3s;
}

.generate-btn:hover {
    background: #e68900;
}

/* File Section */
.hidden {
    display: none;
}

#fileSection {
    margin-top: 20px;
    border: 1px solid #ddd;
    padding: 15px;
    border-radius: 10px;
}

/* File Upload */
.file-upload {
    display: inline-block;
    background: #eee;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
}

.file-upload input {
    display: none;
}

/* Send Button */
.send-btn {
    background: #28A745;
    color: white;
    padding: 10px 15px;
    font-size: 16px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
    transition: 0.3s;
    margin-top: 10px;
}

.send-btn:hover {
    background: #218838;
}

/* File List */
.file-list {
    margin-top: 10px;
    text-align: left;
}

.file-list a {
    display: block;
    color: #4A90E2;
    text-decoration: none;
    margin-top: 5px;
}

.file-list a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    .join-box {
        flex-direction: column;
    }
}