* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
}

body {
    background-color: #f2f2f2;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    padding: 20px;
}

.chat-container {
    background-color: white;
    border: 1px solid #e0e0e0;
    border-radius: 5px;
    box-shadow: 0 3px 7px rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    max-width: 500px;
    width: 100%;
}

.chat-header {
    align-items: center;
    background-color: #0078FF;
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
    color: white;
    display: flex;
    justify-content: center;
    padding: 15px;
}

.chat-output {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.chat-output>p {
    background-color: #0078FF;
    border-radius: 5px;
    color: white;
    margin-bottom: 10px;
    padding: 7px;
}

.chat-output>p.user {
    background-color: #e0e0e0;
    color: black;
}

.chat-input {
    border-top: 1px solid #e0e0e0;
    display: flex;
    padding: 7px;
}

.chat-input>input {
    border: none;
    border-radius: 5px;
    flex: 1;
    margin-right: 7px;
    padding: 5px;
}

.chat-input>button {
    background-color: #0078FF;
    border: none;
    border-radius: 5px;
    color: white;
    cursor: pointer;
    font-weight: bold;
    padding: 7px;
}

.chat-input>button:hover {
    background-color: #0052cc;
}