/* File-Rocket 2.0 Blog-Style UI Design System */
:root {
    /* 基础颜色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-card: #ffffff;
    --bg-header: #ffffff;
    --bg-sidebar: #f9fafb;
    --bg-footer: #f3f4f6;
    
    /* 主色调 - 博客风格配色 */
    --primary-color: #4b5563;
    --primary-light: #e5e7eb;
    --secondary-color: #6b7280;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --success-color: #10b981;
    --danger-color: #ef4444;
    
    /* 点缀配色 */
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-green: #10b981;
    --accent-amber: #f59e0b;
    --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    
    /* 文本颜色 */
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-muted: #d1d5db;
    
    /* 边框和阴影 */
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    
    /* 过渡效果 */
    --transition: all 0.2s ease;
    
    /* 布局尺寸 */
    --header-height: 70px;
    --footer-height: 80px;
    --sidebar-width: 280px;
    --content-max-width: 1200px;
    --content-padding: 2rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 导航栏 */
.navbar {
    background-color: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.navbar-container {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--accent-color);
}







/* 容器 */
.container {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
    flex: 1;
}

/* 主内容区 */
.main-content {
    padding: 3rem 0;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

/* 博客文章式卡片容器 */
.blog-posts {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

/* 博客文章式卡片样式 */
.post-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.post-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.post-card-header {
    padding: 2rem;
    text-align: center;
    border-bottom: 1px solid var(--border-light);
}

.post-card-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.post-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.post-card-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.post-card-content {
    padding: 2rem;
}

/* 按钮样式 */
.btn-primary {
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
    text-decoration: none;
    text-align: center;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(1px);
}

/* 特性列表 */
.features {
    background-color: var(--bg-secondary);
    padding: 3rem var(--content-padding);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin: 2rem auto;
    width: 100%;
    max-width: none;
}

.features-title {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    text-align: left;
    padding: 1.5rem 2rem;
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    width: 100%;
}

.feature:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    font-size: 2rem;
    margin-right: 1.5rem;
    color: var(--accent-color);
    flex-shrink: 0;
}

.feature-text {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 1rem;
    flex: 1;
}

/* 页脚 */
.footer {
    background-color: var(--bg-footer);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: auto;
}

.footer-container {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
    text-align: center;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* 上传和接收页面样式 */
.page-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 0;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* 博客风格表单容器 */
.form-container {
    background-color: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.form-container h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

/* 文件拖拽区域 */
.file-drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 4rem 2rem;
    text-align: center;
    transition: var(--transition);
    background-color: var(--bg-secondary);
    margin-bottom: 2rem;
}

.file-drop-zone:hover, .file-drop-zone.drag-over {
    border-color: var(--accent-color);
    background-color: #eff6ff;
}

.upload-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

/* 文件详情 */
.file-details {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
    border: 1px solid var(--border-light);
}

.file-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
}

.file-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.file-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.file-size {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 取件码显示 */
.pickup-code-display {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    border: 2px dashed var(--accent-color);
}

.pickup-code {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-color);
    letter-spacing: 0.5rem;
    font-family: 'Monaco', 'Courier New', monospace;
    margin: 1.5rem 0;
}

.code-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 状态指示器 */
.status-indicator {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-md);
}

.pulse {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.1); opacity: 1; }
}

/* 进度条 */
.progress-container {
    width: 100%;
    height: 6px;
    background-color: var(--bg-secondary);
    border-radius: 999px;
    overflow: hidden;
    margin: 1.5rem 0;
    border: 1px solid var(--border-light);
}

.progress-fill {
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 999px;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.4);
}

.progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* 完成状态 */
.success-message {
    text-align: center;
    padding: 3rem 2rem;
}

.success-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    color: var(--success-color);
}

.success-message h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.success-message p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* 错误状态 */
.error-message {
    text-align: center;
    padding: 3rem 2rem;
}

.error-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    color: var(--danger-color);
}

.error-message h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.error-message p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* 取件码输入 */
.code-input-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.code-input-wrapper {
    position: relative;
    display: flex;
    gap: 1.25rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.code-box {
    width: 60px;
    height: 68px;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-color);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.code-box.active {
    border-color: var(--accent-color);
    background-color: #eff6ff;
    box-shadow: var(--shadow-md);
}

.code-box.filled {
    background-color: #eff6ff;
    border-color: var(--accent-color);
}

.code-box.pop {
    animation: popBox 0.3s ease;
}

@keyframes popBox {
    0% { transform: scale(0.95); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

#pickupCodeInput {
    position: absolute;
    opacity: 0;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    cursor: pointer;
}

.input-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
}

/* 其他按钮 */
.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
}

.btn-secondary:hover {
    background-color: #e5e7eb;
    box-shadow: var(--shadow-sm);
}

.btn-success {
    background-color: var(--success-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-success:hover {
    background-color: #059669;
    box-shadow: var(--shadow-md);
}

/* 返回按钮 */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
}

.back-link:hover {
    background-color: #e5e7eb;
}

/* 移动端底部返回按钮 */
.mobile-back-btn {
    display: none;
    margin-top: 2rem;
}

/* 阶段切换 */
.stage {
    display: none;
    width: 100%;
}

.stage.active {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .navbar-container {
        padding: 0 1rem;
    }
    
    .main-content {
        padding: 2rem 0;
    }
    
    .blog-posts {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 1rem;
    }
    
    .post-card-header,
    .post-card-content {
        padding: 1.5rem;
    }
    
    .post-card-title {
        font-size: 1.25rem;
    }
    
    .features {
        padding: 2rem 1rem;
        margin: 0 1rem;
    }
    
    .features-title {
        font-size: 1.5rem;
    }
    
    .features-list {
        gap: 0.75rem;
    }
    
    .feature {
        padding: 1rem 1.5rem;
    }
    
    .feature-icon {
        font-size: 1.5rem;
        margin-right: 1rem;
    }
    
    .feature-text {
        font-size: 0.9rem;
    }
    
    .page-container {
        padding: 2rem 1rem;
    }
    
    .form-container {
        padding: 1.5rem;
    }
    
    .pickup-code {
        font-size: 2.25rem;
        letter-spacing: 0.375rem;
    }
    
    .code-input-wrapper {
        gap: 0.75rem;
    }
    
    .code-box {
        width: 50px;
        height: 58px;
        font-size: 1.25rem;
    }
    
    .file-details {
        padding: 1rem;
        gap: 1rem;
    }
    
    .file-icon {
        font-size: 2rem;
    }
    
    .mobile-back-btn {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.75rem 1.5rem;
        background-color: var(--bg-secondary);
        color: var(--text-primary);
        text-decoration: none;
        border-radius: var(--radius-sm);
        font-weight: 500;
        border: 1px solid var(--border-color);
    }
    
    .navbar .back-link {
        display: none;
    }
}

@media (max-width: 480px) {
    .nav-links {
        gap: 1rem;
    }
    
    .nav-links a {
        font-size: 0.875rem;
    }
    
    .post-card-icon {
        font-size: 3rem;
    }
    
    .pickup-code {
        font-size: 2rem;
        letter-spacing: 0.25rem;
    }
    
    .code-box {
        width: 44px;
        height: 52px;
        font-size: 1.125rem;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        padding: 0.75rem 1rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.stage.active {
    animation: fadeInUp 0.5s ease-out;
}

.navbar {
    animation: slideDown 0.5s ease-out;
}

/* 状态文本 */
#statusText {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 2rem;
}

/* 下载信息 */
#downloadFileName {
    color: var(--accent-color);
    font-weight: 600;
}

/* 文件路径显示 */
#filePathDisplay {
    font-size: 0.875rem;
    color: var(--text-secondary);
    background-color: var(--bg-secondary);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    word-break: break-all;
    max-width: 100%;
    text-align: center;
    margin-top: 1rem;
}

/* 等待状态 */
#waiting-stage {
    text-align: center;
}

/* 连接中状态 */
#connecting-stage {
    text-align: center;
}

#connecting-stage h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.25rem;
}

#connecting-stage p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}