body {
    background: linear-gradient(180deg, #b3d9ff, #ffffff);
    font-family: "Segoe UI", Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
.container {
    background: #fff;
    border: 2px solid #1c6dd0;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(28,109,208,0.3);
    padding: 25px;
    width: 350px;
    text-align: center;
}
input, button {
    width: 90%;
    padding: 10px;
    margin: 5px;
    border-radius: 5px;
    border: 1px solid #ccc;
}
button {
    background-color: #1c6dd0;
    color: white;
    font-weight: bold;
    cursor: pointer;
}
button:hover {
    background-color: #1557a0;
}
.chat-box {
    height: 300px;
    overflow-y: auto;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 10px;
}