/* ==================== 
   OpenClaw PWA - 惊艳样式 v3.0
   现代设计：玻璃拟态 + 动态渐变 + 微交互
   ==================== */

/* CSS 变量 */
:root {
    /* 颜色 */
    --primary: #4f46e5;
    --primary-hover: #6366f1;
    --primary-light: rgba(79, 70, 229, 0.15);
    --primary-glow: rgba(79, 70, 229, 0.4);
    --secondary: #7c3aed;
    --secondary-light: rgba(124, 58, 237, 0.15);
    
    --bg-dark: #0a0a14;
    --bg-card: rgba(26, 26, 46, 0.8);
    --bg-card-solid: #1a1a2e;
    --bg-hover: rgba(37, 37, 66, 0.8);
    --bg-input: rgba(22, 22, 42, 0.9);
    
    --text-primary: #f5f5f7;
    --text-secondary: #a0a0b2;
    --text-muted: #6b6b80;
    
    --border-color: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --border-glass: rgba(255, 255, 255, 0.08);
    
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.4);
    --error: #ef4444;
    --error-glow: rgba(239, 68, 68, 0.4);
    --warning: #f59e0b;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* 圆角 */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 60px rgba(79, 70, 229, 0.25);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255,255,255,0.05);
    
    /* 过渡 */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* 安全区域 */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
}

/* ==================== 基础重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'Roboto', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 动态背景 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(79, 70, 229, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(124, 58, 237, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
    animation: bgPulse 10s ease-in-out infinite;
}

@keyframes bgPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

#app {
    height: 100%;
    width: 100%;
}

.hidden {
    display: none !important;
}

/* ==================== 屏幕（登录/聊天） ==================== */
.screen {
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
}

/* ==================== 登录界面 ==================== */
#login-screen {
    background: transparent;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
}

.login-container {
    width: 100%;
    max-width: 400px;
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.logo-icon {
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 8px 30px rgba(79, 70, 229, 0.4));
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.logo-text {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.logo-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

.login-form {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-glass), var(--shadow-glow);
    border: 1px solid var(--border-glass);
    position: relative;
    overflow: hidden;
}

.login-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
}

.input-group {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.input-group input {
    width: 100%;
    padding: var(--spacing-md);
    padding-right: 48px;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 16px;
    transition: all var(--transition-fast);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
}

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

.toggle-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    transition: color var(--transition-fast);
}

.toggle-btn:hover {
    color: var(--text-primary);
}

.login-btn {
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--primary-glow), 0 0 0 1px var(--primary);
}

.login-btn:hover::before {
    left: 100%;
}

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

.login-btn.loading .btn-text {
    visibility: hidden;
}

.login-btn.loading .btn-loader {
    display: block;
}

.btn-loader {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.error-message {
    color: var(--error);
    font-size: 14px;
    margin-top: var(--spacing-md);
    text-align: center;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* ==================== 头部导航 ==================== */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + var(--safe-top));
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    position: relative;
    z-index: 100;
}

.header-left, .header-right {
    display: flex;
    gap: var(--spacing-sm);
}

.header-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.header-title {
    font-size: 18px;
    font-weight: 600;
}

.header-status {
    font-size: 11px;
    color: var(--success);
    display: flex;
    align-items: center;
    gap: 4px;
}

.header-status::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.header-status.disconnected {
    color: var(--error);
}

.header-status.disconnected::before {
    background: var(--error);
}

.icon-btn {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.icon-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.icon-btn.small {
    width: 32px;
    height: 32px;
}

/* ==================== 侧边栏 ==================== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 300px;
    height: 100%;
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    z-index: 200;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    display: flex;
    flex-direction: column;
}

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

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + var(--safe-top));
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.history-item {
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
    margin-bottom: var(--spacing-xs);
}

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

.history-item-title {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-item-time {
    font-size: 12px;
    color: var(--text-muted);
}

.empty-hint {
    text-align: center;
    color: var(--text-muted);
    padding: var(--spacing-xl);
    font-size: 14px;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 199;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.sidebar-overlay:not(.hidden) {
    opacity: 1;
}

/* ==================== 搜索面板 ==================== */
.search-panel {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-dark);
    z-index: 300;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease;
}

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

.search-header {
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + var(--safe-top));
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.search-input-wrap {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-input);
    border-radius: var(--radius-full);
    padding: var(--spacing-sm) var(--spacing-md);
}

.search-input-wrap svg {
    color: var(--text-muted);
    flex-shrink: 0;
}

.search-input-wrap input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
}

.search-input-wrap input::placeholder {
    color: var(--text-muted);
}

.search-results {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.search-result-item {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-result-item:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.search-result-role {
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.search-result-content {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.search-result-time {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.search-highlight {
    background: var(--primary-light);
    color: var(--primary);
    padding: 0 2px;
    border-radius: 2px;
}

/* ==================== 聊天主区域 ==================== */
.chat-main {
    flex: 1;
    overflow-y: auto;
    scroll-behavior: smooth;
}

.messages {
    padding: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

/* 欢迎消息 */
.welcome-message {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.welcome-icon {
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.welcome-message h2 {
    font-size: 24px;
    margin-bottom: var(--spacing-sm);
}

.welcome-message p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.loading-hint {
    color: var(--text-muted);
    font-size: 14px;
}

/* 消息气泡 */
.message {
    margin-bottom: var(--spacing-md);
    animation: messageIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes messageIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* 用户消息特殊动画 */
.message.user {
    display: flex;
    justify-content: flex-end;
}

.message.user .message-bubble {
    animation: userMessageIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 4px 20px var(--primary-glow);
}

@keyframes userMessageIn {
    from {
        opacity: 0;
        transform: translateX(30px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

/* AI 消息流式输出动画 */
.message.assistant .message-bubble {
    animation: assistantMessageIn 0.5s ease;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
}

@keyframes assistantMessageIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 流式输出光标效果 */
.streaming-cursor::after {
    content: '▊';
    animation: cursorBlink 0.6s infinite;
    color: var(--primary);
    margin-left: 2px;
    font-size: 14px;
}

@keyframes cursorBlink {
    0%, 45% { opacity: 1; }
    50%, 95% { opacity: 0; }
    100% { opacity: 1; }
}

.message-bubble {
    max-width: 80%;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    position: relative;
}

.message.user .message-bubble {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-bottom-right-radius: var(--spacing-xs);
}

.message.assistant .message-bubble {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: var(--spacing-xs);
}

.message-content {
    font-size: 15px;
    line-height: 1.7;
    word-wrap: break-word;
}

.message-time {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
    text-align: right;
    opacity: 0.7;
}

.message.user .message-time {
    color: rgba(255, 255, 255, 0.7);
}

.message-content p {
    margin-bottom: var(--spacing-sm);
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content code {
    background: rgba(0, 0, 0, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 13px;
}

.message-content pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    overflow-x: auto;
    margin: var(--spacing-sm) 0;
}

.message-content pre code {
    background: none;
    padding: 0;
}

.message-content ul, .message-content ol {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
}

.message-content li {
    margin-bottom: var(--spacing-xs);
}

.message-content a {
    color: var(--primary);
    text-decoration: none;
}

.message-content a:hover {
    text-decoration: underline;
}

.message-content blockquote {
    border-left: 3px solid var(--primary);
    padding-left: var(--spacing-md);
    margin: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

/* 打字指示器 */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--spacing-md);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

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

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

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    30% {
        transform: translateY(-8px);
        opacity: 1;
    }
}

/* ==================== 输入区域 ==================== */
.input-area {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-glass);
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + var(--safe-bottom));
}

.attachments-preview {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    overflow-x: auto;
    padding-bottom: var(--spacing-xs);
}

.attachment-preview {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
    background: var(--bg-hover);
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
}

.attachment-preview:hover {
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: 0 4px 16px var(--primary-glow);
}

.attachment-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.attachment-preview .file-icon {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 28px;
    gap: 4px;
}

.attachment-preview .file-name {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 4px;
    font-size: 9px;
    color: var(--text-muted);
    background: rgba(0,0,0,0.6);
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.attachment-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    background: rgba(0, 0, 0, 0.6);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-sm);
    max-width: 900px;
    margin: 0 auto;
}

.attach-btn {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-hover);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
    flex-shrink: 0;
    border: 1px solid var(--border-color);
}

.attach-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
    transform: scale(1.05);
}

.attach-btn input {
    display: none;
}

.input-wrap {
    flex: 1;
    min-width: 0;
}

#message-input {
    width: 100%;
    padding: 14px 18px;
    min-height: 48px;
    max-height: 120px;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 16px;
    font-family: inherit;
    resize: none;
    line-height: 1.4;
    transition: all var(--transition-normal);
    box-sizing: border-box;
}

#message-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light), 0 0 20px var(--primary-glow);
    background: rgba(30, 30, 50, 0.9);
}

#message-input::placeholder {
    color: var(--text-muted);
}

.send-btn {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-normal);
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.send-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(255,255,255,0.3) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.send-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 4px 20px var(--primary-glow), 0 0 0 2px var(--primary-light);
}

.send-btn:hover::before {
    opacity: 1;
}

.send-btn:active {
    transform: scale(0.95);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* 发送按钮发送中动画 */
.send-btn.sending {
    animation: sendPulse 0.6s ease infinite;
}

@keyframes sendPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.4);
    }
    50% {
        box-shadow: 0 0 0 12px rgba(79, 70, 229, 0);
    }
}

/* 发送按钮成功动画 */
.send-btn.sent {
    animation: sendSuccess 0.3s ease;
}

@keyframes sendSuccess {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* ==================== PWA 提示条 ==================== */
.pwa-tip {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + var(--safe-bottom));
    z-index: 999;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

.pwa-tip.show {
    transform: translateY(0);
}

.pwa-tip-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

.pwa-tip-content span {
    font-size: 14px;
    flex: 1;
}

.pwa-tip-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.btn-primary-small {
    background: white;
    color: var(--primary);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary-small:hover {
    transform: scale(1.05);
}

.btn-text-small {
    background: rgba(255,255,255,0.2);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-text-small:hover {
    background: rgba(255,255,255,0.3);
}

/* ==================== Toast 提示 ==================== */
.toast {
    position: fixed;
    bottom: calc(100px + var(--safe-bottom));
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    opacity: 0;
    transition: all var(--transition-normal);
}

.toast:not(.hidden) {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

#toast-message {
    font-size: 14px;
    color: var(--text-primary);
}

.toast.error {
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

.toast.success {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

/* ==================== PWA 安装提示 ==================== */
.pwa-prompt {
    position: fixed;
    bottom: var(--spacing-lg);
    left: var(--spacing-lg);
    right: var(--spacing-lg);
    max-width: 400px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    animation: slideUp 0.3s ease;
}

.pwa-prompt-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.pwa-prompt-icon {
    flex-shrink: 0;
}

.pwa-prompt-text {
    flex: 1;
}

.pwa-prompt-text h4 {
    font-size: 16px;
    margin-bottom: 2px;
}

.pwa-prompt-text p {
    font-size: 13px;
    color: var(--text-secondary);
}

.pwa-prompt-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    transition: color var(--transition-fast);
}

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

.btn-primary {
    background: var(--primary);
    border: none;
    color: white;
    font-size: 14px;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary:hover {
    background: var(--primary-hover);
}

/* ==================== 桌面端适配 ==================== */
@media (min-width: 768px) {
    .header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .messages {
        padding: var(--spacing-lg);
    }
    
    .input-area {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    /* 桌面端侧边栏常驻 */
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        width: 280px;
        transform: translateX(0);
        border-right: 1px solid var(--border-color);
    }
    
    .sidebar-overlay {
        display: none !important;
    }
    
    .chat-main {
        margin-left: 280px;
    }
    
    .input-area {
        margin-left: 280px;
    }
    
    #menu-btn {
        display: none;
    }
    
    /* 消息气泡更宽 */
    .message-bubble {
        max-width: 70%;
    }
    
    /* 登录界面更大 */
    .login-container {
        max-width: 420px;
    }
    
    .logo-icon svg {
        width: 100px;
        height: 100px;
    }
    
    .logo-text {
        font-size: 36px;
    }
    
    /* 搜索面板不占满屏 */
    .search-panel {
        top: 80px;
        left: 280px;
        border-radius: var(--radius-lg) 0 0 0;
        box-shadow: var(--shadow-lg);
    }
}

/* ==================== 移动端特殊处理 ==================== */
@media (max-width: 767px) {
    /* 移动端消息更宽 */
    .message-bubble {
        max-width: 85%;
    }
    
    /* 输入框更大 */
    #message-input {
        font-size: 16px; /* 防止 iOS 缩放 */
    }
    
    /* PWA 提示全宽 */
    .pwa-prompt {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }
}

/* ==================== 滚动条美化 ==================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

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

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

/* ==================== 代码块增强 ==================== */
.hljs {
    background: transparent !important;
    padding: 0 !important;
}

/* ==================== Markdown 表格 ==================== */
.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-sm) 0;
}

.message-content th,
.message-content td {
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm);
    text-align: left;
}

.message-content th {
    background: var(--bg-hover);
}

/* ==================== 图片消息 ==================== */
.message-content img {
    max-width: 100%;
    border-radius: var(--radius-sm);
    margin: var(--spacing-sm) 0;
}

/* ==================== 深色模式滚动条（Firefox） ==================== */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}