* {
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    margin: 0;
    height: 100vh;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    justify-content: center;
    align-items: center;
}

/* AUTH BOX */
#auth {
    width: 360px;
    background: #fff;
    padding: 25px;
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
    text-align: center;
}

#auth h2 {
    margin-bottom: 20px;
    color: #333;
}

#auth input {
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    border-radius: 20px;
    border: 1px solid #ccc;
    outline: none;
    font-size: 15px;
}

#auth input:focus {
    border-color: #667eea;
}

#auth button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 20px;
    background: #667eea;
    color: #fff;
    font-size: 15px;
    cursor: pointer;
    margin-top: 8px;
    transition: 0.3s;
}

#auth button:hover {
    background: #5563d6;
}

#auth-msg {
    margin-top: 10px;
    color: red;
    font-size: 14px;
}

/* CHAT CONTAINER */
#chat-container {
    width: 400px;
    height: 560px;
    background: #fff;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

#chat-container h2 {
    padding: 15px;
    margin: 0;
    background: #667eea;
    color: #fff;
    text-align: center;
    border-radius: 16px 16px 0 0;
}

/* CHAT BOX */
#chat-box {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    background: #f4f6fb;
}

/* USER MESSAGE */
.user-message {
    background: #667eea;
    color: #fff;
    padding: 10px 14px;
    border-radius: 14px;
    margin-bottom: 10px;
    max-width: 75%;
    margin-left: auto;
    word-wrap: break-word;
}

/* BOT MESSAGE */
.bot-message {
    background: #e4e6eb;
    color: #333;
    padding: 10px 14px;
    border-radius: 14px;
    margin-bottom: 10px;
    max-width: 75%;
    margin-right: auto;
    word-wrap: break-word;
}

/* INPUT AREA */
.input-container {
    display: flex;
    padding: 12px;
    border-top: 1px solid #ddd;
}

#user-input {
    flex: 1;
    padding: 12px;
    border-radius: 20px;
    border: 1px solid #ccc;
    outline: none;
    font-size: 15px;
}

#user-input:focus {
    border-color: #667eea;
}

.input-container button {
    margin-left: 10px;
    padding: 12px 18px;
    border-radius: 20px;
    border: none;
    background: #667eea;
    color: #fff;
    font-size: 15px;
    cursor: pointer;
    transition: 0.3s;
}

.input-container button:hover {
    background: #5563d6;
}

/* SCROLLBAR */
#chat-box::-webkit-scrollbar {
    width: 6px;
}

#chat-box::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 10px;
}

/* MOBILE RESPONSIVE */
@media (max-width: 480px) {
    #chat-container, #auth {
        width: 95%;
        height: 95vh;
    }
}