#vp-chat-wrapper {
    display: flex;
    height: 600px;
    max-width: 1000px;
    margin: 0 auto;
    border: 1px solid #ccc;
    border-radius: 8px;
    overflow: hidden;
    font-family: Arial, sans-serif;
}

#vp-gpt-list {
    width: 25%;
    min-width: 220px;
    background: #f7f7f7;
    border-right: 1px solid #ccc;
    display: flex;
    flex-direction: column;
    font-family: Arial, sans-serif;
}

#vp-gpt-list h3 {
    background: #000;
    color: #fad20b;
    margin: 0;
    padding: 12px 10px;
    font-weight: bold;
    font-size: 1.1rem;
}

#vp-gpt-list ul {
    list-style: none;
    margin: 0;
    padding: 0;
    flex-grow: 1;
    overflow-y: auto;
}

#vp-gpt-list ul li {
    padding: 10px;
    cursor: pointer;
    border-bottom: 1px solid #ddd;
    color: #666;
    font-size: 1rem;
    user-select: none;
    background: transparent;
    font-weight: normal;
}

#vp-gpt-list ul li.expired {
    color: #d00;
    font-weight: normal;
}

#vp-gpt-list ul li.active {
    background-color: #fad20b;
    color: #000;
    font-weight: bold;
}

#vp-new-assistant-btn {
    margin: 10px;
    padding: 10px;
    background: #f0f0f0;
    border: 1px solid #ccc;
    color: #333;
    text-align: center;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    font-weight: bold;
    font-family: Arial, sans-serif;
    transition: background 0.3s ease;
}

#vp-new-assistant-btn:hover {
    background: #e0e0e0;
}

#vp-chat-area {
    width: 75%;
    display: flex;
    flex-direction: column;
    background: #fff;
    position: relative;
    font-family: Arial, sans-serif;
}

#vp-chat-messages {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    border-bottom: 1px solid #ccc;
    font-size: 1rem;
    color: #000;
    text-align: left;
}

#vp-chat-messages.centered {
    text-align: center;
}

#vp-chat-messages img.expired-icon {
    max-width: 120px;
    margin-bottom: 15px;
}

#vp-expired-message {
    color: red;
    font-weight: bold;
    line-height: 1.4;
}

#vp-chat-input-area {
    padding: 10px;
    border-top: 1px solid #ccc;
    display: flex;
    gap: 10px;
    align-items: center;
}

#vp-chat-input {
    flex-grow: 1;
    resize: none;
    padding: 10px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
    color: #000 !important;
    background: #fff !important;
    font-family: Arial, sans-serif;
}

#vp-chat-send {
    background: #fad20b;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    font-size: 1rem;
    color: #000;
}

#vp-chat-messages .user-message {
    text-align: right;
    margin: 8px 0;
    font-weight: bold;
    color: #333;
}

#vp-chat-messages .vp-message {
    text-align: left;
    margin: 8px 0;
    font-weight: normal;
    color: #000;
}

@media (max-width: 900px) {
    #vp-chat-wrapper { flex-direction: column; height: auto; }
    #vp-gpt-list, #vp-chat-area { width: 100%; }
    #vp-gpt-list { min-width: 0; order: 2; }
    #vp-chat-area { order: 1; }
}

#vp-chat-messages .assistant-typing {
    text-align: left;
    margin: 8px 0;
    font-weight: normal;
    color: #000;
}

/* typing dots animation */
.typing-dots {
    display: inline-block;
    width: 36px;
    vertical-align: middle;
    margin-left: 8px;
}
.typing-dots span {
    display: inline-block;
    width: 8px;
    height: 8px;
    margin: 0 2px;
    background: #333;
    border-radius: 50%;
    opacity: 0.4;
    animation: typing 1s infinite ease-in-out;
}
.typing-dots span:nth-child(1) { animation-delay: 0s; }
.typing-dots span:nth-child(2) { animation-delay: 0.15s; }
.typing-dots span:nth-child(3) { animation-delay: 0.3s; }

@keyframes typing {
    0% { transform: translateY(0); opacity: 0.4; }
    50% { transform: translateY(-6px); opacity: 1; }
    100% { transform: translateY(0); opacity: 0.4; }
}

/* start info image */
#vp-chat-messages img.start-icon {
    max-width: 120px;
    margin-bottom: 12px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}