* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f4f4f4;
}

nav {
    height: 60px;
    padding: 0 20px;
    background: #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

nav img {
    height: 90%;
    transition: transform 0.3s ease-in-out;
}

nav img:hover {
    transform: scale(1.1);
}

#exportButton, #clearButton {
    font-size: 1.5rem;
    font-weight: 600;
    background: #007bff;
    padding: 5px 15px;
    border-radius: 2rem;
    border: none;
    color: white;
    cursor: pointer;
}

#clearButton{
    background: #ff007b;
}

.source{
    color: #007bff;
    cursor: pointer;
}

.container {
    display: flex;
    height: calc(100vh - 60px);
    gap: 20px;
    padding: 20px;
}

.left-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    padding: 20px;
    overflow: hidden;
    transition: 0.3s;
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 10px;
    background: #f9f9f9;
    display: flex;
    flex-direction: column;
}

.chat-container::-webkit-scrollbar {
    width: 8px;
}

.chat-container::-webkit-scrollbar-thumb {
    background: #bbb;
    border-radius: 10px;
}

.chat-message {
    display: flex;
    flex-direction: column;
    padding: 12px 18px;
    border-radius: 18px;
    margin: 10px 0;
    max-width: 75%;
    line-height: 1.6;
    font-size: 16px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: 0.3s;
}

.user-message {
    background: #007bff;
    color: #fff;
    align-self: flex-end;
    text-align: right;
    transition: 0.3s;
}

.user-message:hover, .bot-message:hover {
    transform: scale(1.05);
}

.bot-message {
    background: #f1f1f1;
    color: #333;
    text-align: left;
}

.source-info {
    margin-top: 5px;
    font-size: 12px;
    color: #888;
}

.chat-form {
    display: flex;
    align-items: center;
    border: 1px solid #ccc;
    border-radius: 25px;
    padding: 5px;
    background: #fff;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
    margin-top: 10px;
}

.chat-form input {
    flex: 1;
    padding: 10px;
    border: none;
    font-size: 16px;
    outline: none;
    color: #333;
}

.chat-form button {
    padding: 10px 20px;
    border: none;
    background: #28a745;
    color: white;
    cursor: pointer;
    border-radius: 25px;
    transition: 0.3s;
}

.chat-form button:hover {
    background: #218838;
    transform: scale(1.1);
}

.upload-btn {
    cursor: pointer;
    font-size: 26px;
    transition: 0.3s;
    color: #555;
}

.upload-btn:hover {
    color: #007bff;
    transform: scale(1.1);
}

.right-section {
    flex: 1;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    padding: 20px;
    overflow-y: auto;
    transition: 0.3s;
}

.right-section:hover {
    transform: scale(1.01);
}

.right-section > h2 {
    text-align: center;
    font-size: 24px;
    color: #555;
}

iframe {
    width: 100%;
    height: 90%;
    border: none;
    margin: 0;
    padding: 0;
    transition: 0.3s;
}

iframe:hover {
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-message {
    animation: fadeIn 0.5s;
}