/* 全局样式 */
:root {
    --primary-bg: #000000;
    --secondary-bg: #0a0a0a;
    --tertiary-bg: #121212;
    --hover-bg: #1a1a1a;
    --primary-text: #ffffff;
    --secondary-text: #a0a0a0;
    --border-color: #262626;
    --accent-color: #ffffff;
    --accent-hover: #cccccc;
    --glow-color: rgba(255, 255, 255, 0.03);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--primary-bg);
    color: var(--primary-text);
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
    position: relative;
}

/* 背景效果 */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.glow-effect {
    position: absolute;
    top: 20%;
    left: 50%;
    width: 60vw;
    height: 60vh;
    background: radial-gradient(circle, var(--glow-color) 0%, rgba(0,0,0,0) 70%);
    transform: translate(-50%, -50%);
    opacity: 0.7;
    filter: blur(50px);
    animation: pulse 15s infinite alternate;
}

@keyframes pulse {
    0% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1);
    }
    100% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.3);
    }
}

/* 应用容器 */
.app-container {
    display: flex;
    height: 100vh;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(5px);
}

/* 侧边栏样式 */
.sidebar {
    width: 260px;
    background-color: var(--secondary-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
}

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

.logo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 16px;
}

.header-logo {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 16px;
    margin-top: 10px;
    background-color: transparent;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-text);
    letter-spacing: 1px;
    text-align: center;
}

.new-chat-btn {
    background-color: var(--border-color);
    color: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px;
    font-size: 14px;
    font-weight: 500;
    width: 100%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
    margin-top: 5px;
}

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

.conversations {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.conv-header {
    font-size: 12px;
    color: var(--secondary-text);
    margin-bottom: 12px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
}

.conv-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.conv-item {
    padding: 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all 0.2s;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.conv-item:hover {
    background-color: var(--hover-bg);
    transform: translateX(2px);
}

.conv-item.active {
    background-color: var(--tertiary-bg);
    border-left: 2px solid var(--accent-color);
    padding-left: 8px;
}

.conv-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

.delete-conv-btn {
    opacity: 0;
    color: var(--secondary-text);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.conv-item:hover .delete-conv-btn {
    opacity: 1;
}

.delete-conv-btn:hover {
    color: #ff4444;
    background-color: rgba(255, 68, 68, 0.1);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar {
    width: 32px;
    height: 32px;
    background-color: var(--border-color);
    border: 1px solid var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 14px;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
}

.settings-btn {
    color: var(--secondary-text);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: all 0.2s;
}

.settings-btn:hover {
    background-color: var(--hover-bg);
    color: var(--primary-text);
}

/* 主内容区样式 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    background-color: var(--primary-bg);
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    padding-bottom: 40px;
}

/* 欢迎屏幕 */
.welcome-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    margin-top: 20px;
    padding-bottom: 80px;
}

.welcome-logo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 30px;
}

.main-logo {
    width: 180px;
    height: 180px;
    object-fit: contain;
    margin-bottom: 25px;
    background-color: transparent;
}

.welcome-logo {
    font-size: 46px;
    font-weight: 700;
    color: var(--primary-text);
    letter-spacing: 2px;
    background: linear-gradient(to right, #ffffff, #a0a0a0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeIn 1s ease-out;
}

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

.welcome-screen h1 {
    font-size: 28px;
    margin-bottom: 12px;
    font-weight: 600;
    animation: fadeIn 1s ease-out 0.2s both;
    margin-top: 10px;
}

.welcome-screen p {
    color: var(--secondary-text);
    margin-bottom: 30px;
    font-size: 16px;
    animation: fadeIn 1s ease-out 0.4s both;
}

/* 示例查询 */
.example-queries {
    animation: fadeIn 1s ease-out 0.8s both;
    width: 100%;
    margin-top: 10px;
    position: relative;
    bottom: 20px;
}

.example-queries h3 {
    font-size: 16px;
    margin-bottom: 16px;
    font-weight: 500;
}

.query-suggestions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.query-item {
    background-color: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.query-item:hover {
    border-color: var(--accent-color);
    background-color: var(--hover-bg);
    transform: translateY(-2px);
}

/* 聊天消息 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
    display: none;
    scroll-behavior: smooth;
    margin-bottom: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-left: 220px;
}

.message-container {
    padding: 16px;
    margin: 0 auto;
    max-width: 800px;
    width: 100%;
    display: flex;
    align-items: flex-start;
    opacity: 0;
    animation: messageAppear 0.3s forwards;
    padding-right: 20px;
}

@keyframes messageAppear {
    to {
        opacity: 1;
    }
}

.message-container.user {
    background-color: transparent;
    justify-content: flex-end;
    padding-right: 40px;
    flex-direction: row-reverse;
}

.message-container.user .message-avatar {
    margin-right: 0;
    margin-left: 12px;
}

.message.user {
    color: var(--primary-text);
    background-color: rgba(40, 40, 40, 0.7);
    align-items: flex-end;
    order: 1;
}

.message-container.user .message-avatar {
    order: 2;
}

.message-container.bot {
    background-color: transparent;
    width: 100%;
    backdrop-filter: none;
    justify-content: flex-start;
    padding-left: 0;
}

.message {
    padding: 10px 15px;
    max-width: 80%;
    width: auto;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
}

.message.user {
    color: var(--primary-text);
    background-color: rgba(40, 40, 40, 0.7);
    align-items: flex-end;
}

.message.bot {
    color: var(--primary-text);
    background-color: rgba(30, 30, 30, 0.7);
    align-items: flex-start;
    border-radius: 10px;
    margin-left: 0;
}

.message-content {
    font-size: 15px;
    line-height: 1.6;
    word-break: break-word;
}

/* 消息头像样式 */
.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    background-color: #2d2d2d;
    flex-shrink: 0;
    border: 1px solid var(--border-color);
}

.user-text-avatar {
    font-size: 20px;
    color: #fff;
    font-weight: 500;
}

.message-avatar .avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 调整加载指示器位置 */
#loading-container {
    margin-top: 10px;
    justify-content: flex-start;
    padding-left: 0;
    background-color: transparent;
}

#loading-container .loading-indicator {
    margin-top: 8px;
    margin-left: 12px;
    background-color: rgba(30, 30, 30, 0.7);
}

.loading-indicator {
    display: flex;
    padding: 10px 15px;
    background-color: rgba(30, 30, 30, 0.7);
    border-radius: 10px;
    margin-left: 12px;
}

.loading-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-color);
    border-radius: 50%;
    margin: 0 4px;
    animation: pulse 1.5s infinite;
}

.loading-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.2;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1);
    }
}

/* 聊天输入 */
.chat-input-container {
    border-top: 1px solid var(--border-color);
    padding: 16px;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
    position: fixed;
    bottom: 0;
    left: 220px;
    right: 0;
    background-color: var(--primary-bg);
    z-index: 10;
}

.chat-input-wrapper {
    display: flex;
    align-items: center;
    background-color: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px;
    transition: border-color 0.2s;
}

.chat-input-wrapper:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.05);
}

#chat-input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--primary-text);
    font-size: 15px;
    resize: none;
    outline: none;
    font-family: var(--font-family);
    min-height: 36px;
    max-height: 120px;
    height: auto;
    padding: 8px;
    margin: 0 5px;
    overflow-y: auto;
}

#chat-input::placeholder {
    color: var(--secondary-text);
}

.input-btn {
    background: transparent;
    border: none;
    color: var(--accent-color);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
}

.input-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

#send-btn:hover {
    transform: translateY(-2px);
}

#send-btn:disabled {
    color: var(--secondary-text);
    cursor: not-allowed;
    transform: none;
}

#upload-btn:hover {
    transform: scale(1.05);
}

.arrow-icon {
    font-size: 22px;
    font-weight: 600;
    line-height: 1;
}

.upload-icon {
    font-size: 24px;
    font-weight: 500;
    line-height: 1;
}

.input-footer {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 8px;
    padding: 0 4px;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .chat-input-container {
        left: 0;
    }
    
    .query-suggestions {
        grid-template-columns: 1fr;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

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

/* 选择文本样式 */
::selection {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent-color);
}