/* Chatbot styles - tối ưu mobile & PC, input màu chữ phù hợp */
.chatbot-toggle {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    background: linear-gradient(135deg, #0066cc 60%, #00c3ff 100%);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.18);
    font-size: 2.2rem;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.chatbot-toggle:hover {
    background: linear-gradient(135deg, #004a99 60%, #0099cc 100%);
    box-shadow: 0 6px 24px rgba(0,0,0,0.22);
}
.chatbot-widget {
    position: fixed;
    bottom: 90px;
    right: 24px;
    width: 350px;
    max-width: 99vw;
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.22);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    font-family: 'Inter', Arial, sans-serif;
    border: 1.5px solid #e0e0e0;
    animation: chatbot-pop 0.25s cubic-bezier(.4,1.4,.6,1) 1;
}
@keyframes chatbot-pop {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}
.chatbot-header {
    background: linear-gradient(90deg, #0066cc 70%, #00c3ff 100%);
    color: #fff;
    padding: 14px 18px 12px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 700;
    font-size: 1.1rem;
    border-bottom: 1px solid #e0e0e0;
    position: relative;
}
.chatbot-header span {
    display: flex;
    align-items: center;
    gap: 8px;
}
.chatbot-header .chatbot-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 6px;
    box-shadow: 0 2px 8px rgba(0,102,204,0.08);
}
.chatbot-header button {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.7rem;
    cursor: pointer;
    padding: 0 2px;
    transition: color 0.2s;
}
.chatbot-header button:hover {
    color: #ffe066;
}
.chatbot-messages {
    flex: 1;
    padding: 16px 12px 12px 12px;
    background: #f7f9fa;
    overflow-y: auto;
    max-height: 340px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    scroll-behavior: smooth;
}
.chatbot-message {
    margin-bottom: 2px;
    padding: 10px 16px;
    border-radius: 18px;
    max-width: 85%;
    word-break: break-word;
    font-size: 1.01rem;
    line-height: 1.5;
    box-shadow: 0 1px 4px rgba(0,102,204,0.04);
    display: inline-block;
    position: relative;
    animation: chatbot-msg-in 0.18s cubic-bezier(.4,1.4,.6,1) 1;
}
@keyframes chatbot-msg-in {
    0% { transform: translateY(16px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}
.chatbot-message.bot {
    background: #e3f0fc;
    color: #0066cc;
    align-self: flex-start;
    border-bottom-left-radius: 6px;
}
.chatbot-message.user {
    background: linear-gradient(135deg, #0066cc 60%, #00c3ff 100%);
    color: #fff;
    align-self: flex-end;
    border-bottom-right-radius: 6px;
    margin-left: auto;
}
.chatbot-message.loading {
    background: #e3f0fc;
    color: #0066cc;
    font-style: italic;
    opacity: 0.7;
    min-width: 48px;
}
#chatbot-form {
    display: flex;
    border-top: 1.5px solid #e0e0e0;
    background: #fff;
    padding: 8px 8px 8px 12px;
    gap: 8px;
}
#chatbot-input {
    flex: 1;
    border: 1.5px solid #cce0ff;
    padding: 10px 12px;
    font-size: 1.05rem;
    border-radius: 12px;
    outline: none;
    background: #f7f9fa;
    color: #222;
    transition: border 0.2s, background 0.2s, color 0.2s;
    font-family: inherit;
}
#chatbot-input:focus {
    border: 1.5px solid #0066cc;
    background: #fff;
    color: #111;
}
#chatbot-input::placeholder {
    color: #888;
    opacity: 1;
}
#chatbot-form button {
    background: linear-gradient(135deg, #0066cc 60%, #00c3ff 100%);
    color: #fff;
    border: none;
    padding: 0 22px;
    font-size: 1.15rem;
    cursor: pointer;
    border-radius: 10px;
    font-weight: 600;
    transition: background 0.2s;
    box-shadow: 0 2px 8px rgba(0,102,204,0.08);
}
#chatbot-form button:hover {
    background: linear-gradient(135deg, #004a99 60%, #0099cc 100%);
}
@media (max-width: 600px) {
    .chatbot-widget {
        width: 100vw;
        right: 0;
        left: 0;
        bottom: 0;
        border-radius: 0;
        max-width: 100vw;
        min-height: 60vh;
        height: 60vh;
    }
    .chatbot-header {
        font-size: 1rem;
        padding: 12px 10px 10px 10px;
    }
    .chatbot-messages {
        max-height: 45vh;
        padding: 10px 4px 8px 4px;
    }
    #chatbot-form {
        padding: 6px 4px 6px 6px;
        gap: 4px;
    }
    #chatbot-input {
        font-size: 1rem;
        padding: 8px 8px;
    }
    #chatbot-form button {
        font-size: 1rem;
        padding: 0 12px;
    }
    .chatbot-toggle {
        width: 52px;
        height: 52px;
        font-size: 1.6rem;
        bottom: 16px;
        right: 16px;
    }
}