.ai-chat-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    border-left: 1px solid rgba(128, 128, 128, 0.12);
    position: relative;
}

/* Resize Handle */
.ai-resize-handle {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    cursor: col-resize;
    z-index: 10;
    transition: background 0.15s ease;
}

.ai-resize-handle:hover,
.ai-resize-handle.active {
    background: rgba(22, 119, 255, 0.5);
}

/* Header */
.ai-chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(128, 128, 128, 0.1);
    flex-shrink: 0;
}

.ai-chat-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.ai-chat-header-left .ai-logo {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    font-size: 16px;
    font-weight: 700;
    flex-shrink: 0;
}

.ai-chat-header-left .ai-title {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.ai-chat-header-right {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Messages Area */
.ai-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.ai-chat-messages::-webkit-scrollbar {
    width: 5px;
}

.ai-chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.ai-chat-messages::-webkit-scrollbar-thumb {
    background: rgba(128, 128, 128, 0.3);
    border-radius: 3px;
}

/* Welcome */
.ai-chat-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 40px 20px;
    text-align: center;
    flex: 1;
}

.ai-chat-welcome .welcome-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    font-size: 28px;
}

.ai-chat-welcome .welcome-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.ai-chat-welcome .quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-top: 8px;
}

.ai-chat-welcome .quick-action-btn {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid;
}

.ai-chat-welcome .quick-action-btn:hover {
    background: rgba(99, 102, 241, 0.12) !important;
    border-color: rgba(99, 102, 241, 0.3) !important;
    color: #818cf8 !important;
}

/* IDE Style Messages */
.ai-ide-message {
    padding: 12px 16px;
    animation: ai-msg-in 0.2s ease-out;
}

@keyframes ai-msg-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-ide-message-header {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.ai-ide-message-content {
    font-size: 13px;
    line-height: 1.6;
    word-break: break-word;
    /* Remove pre-wrap here, as it conflicts with ReactMarkdown's block rendering */
}

/* Markdown Styles Override */
.ai-markdown-content {
    white-space: normal;
}
.ai-markdown-content p {
    margin: 0 0 10px;
}
.ai-markdown-content p:last-child {
    margin-bottom: 0;
}
.ai-markdown-content h1,
.ai-markdown-content h2,
.ai-markdown-content h3,
.ai-markdown-content h4,
.ai-markdown-content h5,
.ai-markdown-content h6 {
    margin: 16px 0 8px;
    line-height: 1.4;
    font-weight: 600;
}
.ai-markdown-content h1:first-child,
.ai-markdown-content h2:first-child,
.ai-markdown-content h3:first-child,
.ai-markdown-content h4:first-child,
.ai-markdown-content h5:first-child,
.ai-markdown-content h6:first-child {
    margin-top: 0;
}
.ai-markdown-content pre {
    margin: 10px 0;
    border-radius: 4px;
    padding: 10px;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 12px;
    overflow-x: auto;
    border: 1px solid rgba(128, 128, 128, 0.15);
    background: rgba(0, 0, 0, 0.2);
}
.ai-markdown-content code {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    background: rgba(128, 128, 128, 0.15);
    padding: 2px 4px;
    border-radius: 3px;
    font-size: 0.95em;
}
.ai-markdown-content ul, .ai-markdown-content ol {
    margin: 0 0 10px;
    padding-left: 20px;
}
.ai-markdown-content li {
    margin-bottom: 4px;
}

/* Advanced Typing/Blinker indicator */
.ai-blinking-cursor {
    display: inline-block;
    width: 6px;
    height: 14px;
    background-color: currentColor;
    border-radius: 1px;
    vertical-align: middle;
    margin-left: 4px;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

@keyframes ai-dot-bounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
}

/* History Drawer Styles */
.ai-history-list::-webkit-scrollbar {
    width: 4px;
}
.ai-history-list::-webkit-scrollbar-thumb {
    background: rgba(128, 128, 128, 0.2);
    border-radius: 4px;
}
.ai-history-list:hover::-webkit-scrollbar-thumb {
    background: rgba(128, 128, 128, 0.4);
}

.ai-history-item:hover {
    background: rgba(128, 128, 128, 0.08) !important;
}

.ai-history-item .ai-history-delete-btn {
    opacity: 0;
    transition: opacity 0.2s, background 0.2s;
}

.ai-history-item:hover .ai-history-delete-btn,
.ai-history-item.active .ai-history-delete-btn {
    opacity: 1;
}

/* Input Area */
.ai-chat-input-area {
    padding: 12px 16px 16px;
    border-top: 1px solid rgba(128, 128, 128, 0.1);
    flex-shrink: 0;
}

/* Textarea scrollbar */
.ai-chat-input-wrapper textarea {
    scrollbar-width: thin;
    scrollbar-color: rgba(128, 128, 128, 0.3) transparent;
}

.ai-chat-input-wrapper textarea::-webkit-scrollbar {
    width: 4px;
}

.ai-chat-input-wrapper textarea::-webkit-scrollbar-track {
    background: transparent;
}

.ai-chat-input-wrapper textarea::-webkit-scrollbar-thumb {
    background: rgba(128, 128, 128, 0.3);
    border-radius: 2px;
}

.ai-chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    border-radius: 6px;
    border: 1px solid transparent;
    border-bottom-color: rgba(128, 128, 128, 0.4);
    padding: 6px 10px;
    transition: all 0.2s ease;
    background: transparent !important;
    box-shadow: none !important;
}

.ai-chat-input-wrapper:focus-within {
    border-color: var(--ant-primary-color, #1677ff) !important;
    background: rgba(128, 128, 128, 0.05) !important;
}

.ai-chat-input-wrapper textarea {
    width: 100%;
    border: none;
    outline: none;
    background: transparent;
    resize: none;
    font-size: 13px;
    line-height: 1.5;
    min-height: 28px;
    max-height: 200px;
    padding: 0;
    font-family: inherit;
    overflow-y: auto;
}

.ai-chat-input-wrapper textarea::placeholder {
    opacity: 0.4;
}

.ai-chat-send-btn {
    width: 26px;
    height: 26px;
    border-radius: 4px;
    display: grid;
    place-items: center;
    border: none;
    cursor: pointer;
    flex-shrink: 0;
    transition: transform 0.15s ease, opacity 0.15s ease;
}

.ai-chat-send-btn:hover {
    transform: scale(1.06);
}

.ai-chat-send-btn:active {
    transform: scale(0.96);
}

.ai-chat-send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.ai-ide-message:hover .ai-message-actions {
    opacity: 1 !important;
}