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

:root {
    --primary-color: #1a1a1a;
    --secondary-color: #2d2d2d;
    --accent-color: #0066ff;
    --accent-hover: #0052cc;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f5;
    --text-primary: #1a1a1a;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --border-color: #e9ecef;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --error-color: #dc3545;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-secondary);
    margin: 0;
    padding: 0;
    color: var(--text-primary);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
}

.container {
    max-width: 100%;
    margin: 0;
    background: var(--bg-primary);
    height: 100vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.main-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}

header {
    background: var(--primary-color);
    color: white;
    padding: 24px 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo svg {
    color: var(--accent-color);
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    margin: 0;
}

.header-subtitle {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
    font-weight: 400;
}

/* 侧边栏样式 */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    height: 100%;
    overflow: hidden;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.new-chat-btn {
    width: 100%;
    padding: 10px 16px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.new-chat-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.new-chat-btn span {
    font-size: 1.2em;
    line-height: 1;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 16px;
    min-height: 0;
}

.sidebar-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    padding: 0 8px;
}

.conversations-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.conversation-item {
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.conversation-item:hover {
    background: var(--bg-tertiary);
}

.conversation-item.active {
    background: var(--bg-primary);
    border-color: var(--accent-color);
}

.conversation-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.conversation-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* 对话界面样式 */
.chat-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
    background: var(--bg-primary);
    overflow: hidden;
    height: 100%;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 24px;
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.message {
    margin-bottom: 24px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    animation: fadeIn 0.3s ease-in;
    width: 100%;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.user {
    flex-direction: row-reverse;
    justify-content: flex-end;
}

.message.system {
    justify-content: center;
    margin-bottom: 16px;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
    margin-top: 2px;
}

.message.user .message-avatar {
    background: var(--accent-color);
    color: white;
}

.message.assistant .message-avatar {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.message.system .message-avatar {
    display: none;
}

.message-content {
    flex: 0 1 auto;
    max-width: 70%;
    min-width: 120px;
    display: flex;
    flex-direction: column;
}

.message.user .message-content {
    align-items: flex-end;
    margin-left: auto;
}

.message.assistant .message-content {
    align-items: flex-start;
    margin-right: auto;
}

.message.system .message-content {
    max-width: 90%;
    align-items: center;
    margin: 0 auto;
}

.message-bubble {
    padding: 12px 16px;
    border-radius: 8px;
    word-wrap: break-word;
    word-break: break-word;
    line-height: 1.6;
    box-shadow: var(--shadow-sm);
    white-space: pre-wrap;
}

.message.user .message-bubble {
    background: var(--accent-color);
    color: white;
    border-bottom-right-radius: 2px;
}

.message.assistant .message-bubble {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 2px;
}

.message.assistant .message-bubble pre {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: inherit;
}

.message.system .message-bubble {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.875rem;
    padding: 10px 16px;
    width: 100%;
}

.message-time {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-top: 4px;
    padding: 0 2px;
    font-weight: 400;
}

/* MCP调用区域 */
.mcp-call-section {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
    width: 100%;
}

.mcp-call-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}

.mcp-call-label::before {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
}

.mcp-call-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.chat-input-container {
    display: flex;
    gap: 12px;
    padding: 20px 24px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.chat-input-container input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9375rem;
    outline: none;
    transition: all 0.2s;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.chat-input-container input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.chat-input-container input::placeholder {
    color: var(--text-muted);
}

.chat-input-container button {
    padding: 12px 24px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all 0.2s;
    white-space: nowrap;
}

.chat-input-container button:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.chat-input-container button:active {
    transform: translateY(0);
}

/* MCP调用详情按钮 */
.mcp-detail-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-primary);
    color: var(--accent-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.mcp-detail-btn:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.mcp-detail-btn:active {
    transform: translateY(0);
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    overflow: auto;
    animation: fadeIn 0.2s ease-in;
}

.modal-content {
    background-color: var(--bg-primary);
    margin: 5% auto;
    padding: 0;
    border-radius: 12px;
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.modal-header h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1.5rem;
    line-height: 1;
    transition: all 0.2s;
    border: none;
    background: transparent;
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.detail-section {
    margin-bottom: 24px;
}

.detail-section:last-child {
    margin-bottom: 0;
}

.detail-section h3 {
    color: var(--text-primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9375rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-item {
    margin-bottom: 10px;
    padding: 8px 0;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.detail-item strong {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    min-width: 80px;
}

.detail-item span {
    color: var(--text-primary);
    font-size: 0.875rem;
}

.code-block {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    font-family: 'SF Mono', 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 0.8125rem;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
    max-height: 400px;
    overflow-y: auto;
    color: var(--text-primary);
}

.code-block.error {
    background: #fff5f5;
    border-color: var(--error-color);
    color: var(--error-color);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    body {
        height: 100vh;
        overflow: hidden;
    }
    
    .container {
        border-radius: 0;
        height: 100vh;
        overflow: hidden;
    }
    
    header {
        padding: 16px 20px;
        flex-shrink: 0;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .header-subtitle {
        display: none;
    }
    
    .main-layout {
        overflow: hidden;
        min-height: 0;
    }
    
    .sidebar {
        height: 100%;
        overflow: hidden;
    }
    
    .sidebar-content {
        min-height: 0;
    }
    
    .chat-container {
        height: 100%;
        overflow: hidden;
    }
    
    .chat-messages {
        padding: 16px;
        min-height: 0;
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .chat-input-container {
        padding: 16px;
        flex-shrink: 0;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}