/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #343541;
    --bg-secondary: #40414f;
    --bg-tertiary: #2d2e39;
    --bg-sidebar: #202123;
    --text-primary: #ececf1;
    --text-secondary: #8e8ea0;
    --border-color: #565869;
    --accent-color: #10a37f;
    --accent-hover: #0d8f6e;
    --user-msg-bg: #343541;
    --assistant-msg-bg: #444654;
    --input-bg: #40414f;
    --input-border: #565869;
    --shadow: rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* 侧边栏样式 */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.sidebar-header {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 8px;
    align-items: center;
}

.new-chat-btn {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s;
}

.new-chat-btn:hover {
    background-color: var(--bg-secondary);
}

.sidebar-toggle {
    padding: 8px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 4px;
    display: none;
}

.sidebar-toggle:hover {
    background-color: var(--bg-secondary);
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.chat-history-item {
    padding: 12px;
    margin-bottom: 4px;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 14px;
    transition: background-color 0.2s;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chat-history-item:hover {
    background-color: var(--bg-secondary);
}

.chat-history-item.active {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}


/* 主内容区 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.top-bar {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    gap: 12px;
}

.menu-btn {
    display: none;
    padding: 8px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 4px;
}

.menu-btn:hover {
    background-color: var(--bg-secondary);
}

.app-title {
    flex: 1;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.api-selector {
    padding: 6px 12px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
    min-width: 120px;
}

.api-selector:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-color);
}

.api-selector:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(16, 163, 127, 0.1);
}

.icon-btn {
    padding: 8px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.icon-btn:hover {
    background-color: var(--bg-secondary);
}

/* 聊天容器 */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px 0;
    scroll-behavior: smooth;
}

.chat-messages {
    max-width: 768px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 欢迎屏幕 */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
}

.welcome-content h2 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.welcome-content p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.suggestions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 500px;
}

.suggestion-btn {
    padding: 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    text-align: left;
    transition: background-color 0.2s, border-color 0.2s;
}

.suggestion-btn:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-color);
}

/* 消息样式 */
.message {
    display: flex;
    gap: 24px;
    padding: 24px 0;
    animation: messageSlideIn 0.3s ease-out;
}

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

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 600;
    font-size: 14px;
}

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

.message.assistant .message-avatar {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message-text {
    line-height: 1.75;
    color: var(--text-primary);
    word-wrap: break-word;
}

/* Markdown渲染后的元素样式 */
.message-text h1,
.message-text h2,
.message-text h3,
.message-text h4,
.message-text h5,
.message-text h6 {
    margin: 16px 0 8px 0;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}

.message-text h1 {
    font-size: 1.75em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.message-text h2 {
    font-size: 1.5em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
}

.message-text h3 {
    font-size: 1.25em;
}

.message-text h4 {
    font-size: 1.1em;
}

.message-text h5 {
    font-size: 1em;
}

.message-text h6 {
    font-size: 0.9em;
    color: var(--text-secondary);
}

.message-text p {
    margin: 12px 0;
}

.message-text ul,
.message-text ol {
    margin: 12px 0;
    padding-left: 24px;
}

.message-text li {
    margin: 6px 0;
}

.message-text ul {
    list-style-type: disc;
}

.message-text ol {
    list-style-type: decimal;
}

.message-text blockquote {
    margin: 12px 0;
    padding: 12px 16px;
    border-left: 4px solid var(--accent-color);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 4px;
}

.message-text blockquote p {
    margin: 0;
}

.message-text a {
    color: var(--accent-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.message-text a:hover {
    border-bottom-color: var(--accent-color);
}

.message-text table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    overflow-x: auto;
    display: block;
}

.message-text table thead {
    background-color: var(--bg-tertiary);
}

.message-text table th,
.message-text table td {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.message-text table th {
    font-weight: 600;
    color: var(--text-primary);
}

.message-text table tbody tr:nth-child(even) {
    background-color: var(--bg-tertiary);
}

.message-text hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 24px 0;
}

.message-text img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 12px 0;
}

.message-text code {
    background-color: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
    color: var(--text-primary);
}

.message-text pre {
    background-color: var(--bg-tertiary);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 12px 0;
    border: 1px solid var(--border-color);
    position: relative;
}

.message-text pre code {
    background: none;
    padding: 0;
    font-size: 0.9em;
    color: inherit;
}

/* 代码高亮样式调整 */
.message-text pre.hljs {
    background-color: var(--bg-tertiary);
    padding: 16px;
}

/* 代码复制按钮 */
.message-text pre .copy-code-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 8px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    opacity: 0;
    z-index: 10;
}

.message-text pre:hover .copy-code-btn {
    opacity: 1;
}

.message-text pre .copy-code-btn:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--accent-color);
}

.message-text pre .copy-code-btn.copied {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    opacity: 1;
}

.message-text pre .copy-code-btn svg {
    width: 16px;
    height: 16px;
    display: block;
}

.message-text strong {
    font-weight: 600;
    color: var(--text-primary);
}

.message-text em {
    font-style: italic;
}

.message-text del {
    text-decoration: line-through;
    opacity: 0.7;
}

/* 输入区域 */
.input-container {
    padding: 24px;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.input-wrapper {
    max-width: 768px;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: flex-end;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 12px;
    padding: 12px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-wrapper:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(16, 163, 127, 0.1);
}

.message-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 16px;
    font-family: inherit;
    resize: none;
    max-height: 200px;
    overflow-y: auto;
    padding: 0;
    line-height: 1.5;
}

.message-input:focus {
    outline: none;
}

.message-input::placeholder {
    color: var(--text-secondary);
}

.send-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background-color: var(--accent-color);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, transform 0.1s;
    flex-shrink: 0;
    margin-left: 8px;
}

.send-btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

.send-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.input-footer {
    text-align: center;
    margin-top: 12px;
}

.disclaimer {
    font-size: 12px;
    color: var(--text-secondary);
}

/* API警告提示 */
.api-warning {
    background-color: #f59e0b;
    color: white;
    padding: 12px 16px;
    margin: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    animation: slideDown 0.3s ease-out;
}

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

.api-warning-content {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 768px;
    margin: 0 auto;
    font-size: 14px;
}

.api-warning-content svg {
    color: white;
}

/* 打字指示器 */
.typing-indicator {
    padding: 24px 0;
    display: flex;
    justify-content: center;
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    animation: typingDot 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(1) {
    animation-delay: 0s;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingDot {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* 遮罩层 */
.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .overlay.show {
        display: block;
    }

    .menu-btn {
        display: block;
    }

    .sidebar-toggle {
        display: block;
    }

    .chat-messages {
        padding: 0 16px;
    }

    .input-container {
        padding: 16px;
    }

    .welcome-content h2 {
        font-size: 24px;
    }

    .suggestions {
        max-width: 100%;
    }
}

/* 滚动条样式 */
.chat-container::-webkit-scrollbar,
.chat-history::-webkit-scrollbar {
    width: 8px;
}

.chat-container::-webkit-scrollbar-track,
.chat-history::-webkit-scrollbar-track {
    background: transparent;
}

.chat-container::-webkit-scrollbar-thumb,
.chat-history::-webkit-scrollbar-thumb {
    background-color: var(--bg-secondary);
    border-radius: 4px;
}

.chat-container::-webkit-scrollbar-thumb:hover,
.chat-history::-webkit-scrollbar-thumb:hover {
    background-color: var(--border-color);
}