body {

    margin: 0;

    background: #0f172a;

    font-family: Arial;

    color: white;
}

.app {

    max-width: 900px;

    height: 100vh;

    margin: auto;

    display: flex;

    flex-direction: column;
}

.header {

    padding: 20px;

    font-size: 24px;

    font-weight: bold;

    border-bottom: 1px solid #1e293b;
}

.chat {

    flex: 1;

    overflow-y: auto;

    padding: 20px;
}

.message {

    margin-bottom: 16px;

    padding: 14px;

    border-radius: 16px;

    max-width: 80%;

    white-space: pre-wrap;
}

.user {

    background: #2563eb;

    margin-left: auto;
}

.bot {

    background: #1e293b;
}

.footer {

    display: flex;

    gap: 10px;

    padding: 20px;

    border-top: 1px solid #1e293b;
}

textarea {

    flex: 1;

    resize: none;

    border: none;

    outline: none;

    background: #1e293b;

    color: white;

    border-radius: 12px;

    padding: 12px;

    height: 60px;
}

button {

    border: none;

    background: #2563eb;

    color: white;

    border-radius: 12px;

    padding: 0 20px;

    cursor: pointer;
}