body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background-color: #f4f4f7;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.chat-container {
    width: 100%;
    max-width: 500px;
    height: 90vh;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-box {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    border-bottom: 1px solid #ddd;
}

.input-area {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 15px;
    background: #fafafa;
}

input[type="text"],
input[type="file"] {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 14px;
}

button {
    padding: 10px;
    background-color: #4f46e5;
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s ease;
}

    button:hover {
        background-color: #3730a3;
    }