:root {
    --primary-color: #28a745; /* Màu xanh lá cây */
    --header-color: #28a745;
    --background-color: #ffffff;
    --bot-message-bg: #f1f0f0;
    --user-message-bg: #e1ffc7;
    --text-color: #333;
    --font-family: 'Roboto', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.chatbot-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    border-radius: 10px;
    overflow: hidden;
}

.chatbot-header {
    background-color: var(--header-color);
    color: white;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

/* Đoạn mã cũ để thay thế */
.chatbot-logo {
    width: 35px;
    height: 35px;
    margin-right: 10px;
    /* Bỏ border và border-radius */
}

.chatbot-title {
    font-size: 1.1em;
    font-weight: 500;
}

.chatbot-messages {
    flex-grow: 1;
    padding: 15px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

/* Custom scrollbar */
.chatbot-messages::-webkit-scrollbar {
    width: 6px;
}
.chatbot-messages::-webkit-scrollbar-track {
    background: #f1f1f1;
}
.chatbot-messages::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 6px;
}
.chatbot-messages::-webkit-scrollbar-thumb:hover {
    background: #aaa;
}


.message {
    margin-bottom: 12px;
    padding: 10px 15px;
    border-radius: 18px;
    max-width: 85%;
    line-height: 1.5;
    word-wrap: break-word;
}

.bot-message {
    background-color: var(--bot-message-bg);
    color: var(--text-color);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.user-message {
    background-color: var(--user-message-bg);
    color: var(--text-color);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.suggestion-box {
    padding: 5px 15px;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    border-top: 1px solid #eee;
    background: #fafafa;
}

.suggestion-item {
    padding: 5px 10px;
    font-size: 0.8em;
    background-color: #e9e9e9;
    border-radius: 15px;
    cursor: pointer;
    transition: background-color 0.2s;
}
.suggestion-item:hover {
    background-color: #dcdcdc;
}

.chatbot-input-form {
    display: flex;
    padding: 10px;
    border-top: 1px solid #eee;
    background: #fff;
    flex-shrink: 0;
}

#user-input {
    flex-grow: 1;
    border: none;
    padding: 10px;
    font-size: 1em;
    border-radius: 20px;
    background-color: #f1f0f0;
    outline: none;
}

#user-input:focus {
    background-color: #e9e9e9;
}


#send-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0 10px;
    color: var(--primary-color);
}
#send-btn:hover {
    opacity: 0.8;
}

.qr-code-image {
    max-width: 150px;
    display: block;
    margin: 10px auto;
}