* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.chat-container {
    width: 100%;
    max-width: 400px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    height: 80vh;
}

.chat-header {
    background: #007bff;
    color: white;
    padding: 15px;
    border-radius: 10px 10px 0 0;
    text-align: center;
}

.chat-box {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background-color: #e5ddd5;
}

.mensagem {
    display: flex;
    width: 100%;
}

.mensagem.cliente {
    justify-content: flex-end;
}

.mensagem.bot {
    justify-content: flex-start;
}

.texto {
    max-width: 75%;
    padding: 10px 15px;
    border-radius: 15px;
    font-size: 14px;
    line-height: 1.4;
}

.cliente .texto {
    background-color: #dcf8c6;
    border-bottom-right-radius: 2px;
}

.bot .texto {
    background-color: #fff;
    border-bottom-left-radius: 2px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.chat-input-area {
    display: flex;
    padding: 10px;
    background: #f0f0f0;
    border-radius: 0 0 10px 10px;
}

#mensagem-input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 20px;
    outline: none;
}

#btn-enviar {
    background: #007bff;
    color: white;
    border: none;
    padding: 10px 15px;
    margin-left: 10px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: bold;
}

#btn-enviar:hover {
    background: #0056b3;
}