/* 全局样式 */
:root {
    --primary-color: #007AFF;
    --background-color: #F5F5F7;
    --text-color: #1D1D1F;
    --border-radius: 12px;
    --sidebar-width: 260px;
    --top-bar-height: 60px;
    --sidebar-background: #ffffff;
    --content-background: #F5F5F7;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-color);
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
}

/* 应用布局 */
.app {
    display: flex;
    height: 100vh;
}

/* 侧边栏样式 */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-background);
    border-right: 1px solid #E5E5E5;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid #E5E5E5;
}

.sidebar-header h1 {
    font-size: 1.2rem;
    font-weight: 600;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0;
}

.nav-group {
    margin-bottom: 1.5rem;
}

.nav-group h3 {
    padding: 0.5rem 1.5rem;
    font-size: 0.9rem;
    color: #86868B;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-group ul {
    list-style: none;
}

.nav-group li a {
    display: block;
    padding: 0.8rem 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.nav-group li.active a {
    background: #E8F2FF;
    color: var(--primary-color);
}

.nav-group li a:hover {
    background: #F5F5F7;
}

/* 主内容区样式 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--content-background);
    overflow: hidden;
}

/* 顶部栏样式 */
.top-bar {
    height: var(--top-bar-height);
    background: var(--sidebar-background);
    border-bottom: 1px solid #E5E5E5;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
}

.tool-title {
    font-size: 1.1rem;
    font-weight: 500;
}

.tool-actions {
    display: flex;
    gap: 1rem;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: #F5F5F7;
}

.theme-toggle svg {
    fill: #86868B;
}

/* 工具容器样式 */
.tool-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
}

/* 工具内容样式 */
.tool-content {
    max-width: 1200px;
    margin: 0 auto;
}

/* 保持原有的上传区域、预览区域等样式不变 */
/* ... */

/* 响应式设计 */
@media (max-width: 768px) {
    .app {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
    }

    .sidebar-nav {
        display: none;
    }

    .tool-container {
        padding: 1rem;
    }
}

/* 上传区域样式 */
.upload-area {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.upload-box {
    border: 2px dashed #E5E5E5;
    border-radius: var(--border-radius);
    padding: 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-box:hover {
    border-color: var(--primary-color);
}

.upload-icon {
    width: 48px;
    height: 48px;
    fill: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-hint {
    color: #86868B;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* 预览区域样式 */
.preview-area {
    flex: 2;
    display: flex;
    flex-direction: column;
    max-height: 100%;
    overflow-y: auto;
}

.preview-container {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.preview-box {
    flex: 1;
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.preview-box h3 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.preview-box img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    transition: opacity 0.3s ease;
}

.preview-box img:not([src]) {
    opacity: 0;
}

.file-info {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #f0f0f0;
    color: #86868B;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
}

/* 控制区域样式 */
.controls {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.quality-control {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

input[type="range"] {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    background: #E5E5E5;
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
}

.download-btn {
    width: 100%;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: #0056b3;
    transform: translateY(-1px);
}

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

/* 添加图片后的上传区域样式 */
.has-image .upload-area {
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.has-image .upload-box {
    padding: 1rem;
}

.has-image .upload-icon {
    width: 32px;
    height: 32px;
    margin-bottom: 0.8rem;
}

.has-image .upload-hint {
    font-size: 0.8rem;
}

/* 响应式设计补充 */
@media (max-width: 768px) {
    .preview-container {
        flex-direction: column;
        gap: 1rem;
    }

    .preview-box {
        padding: 1rem;
    }

    .controls {
        padding: 1rem;
    }

    .quality-control {
        flex-wrap: wrap;
    }

    .quality-control label {
        min-width: 70px;
    }
}

/* 工具头部样式 */
.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}

.tool-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.tool-description {
    color: #86868B;
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* 压缩容器样式 */
.compression-container {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

/* 压缩设置区域 */
.compression-settings {
    flex: 1;
    min-width: 300px;
}

/* 上传区域样式优化 */
.upload-area {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.upload-box {
    border: 2px dashed #E5E5E5;
    border-radius: var(--border-radius);
    padding: 2rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.upload-title {
    font-size: 1.1rem;
    font-weight: 500;
    margin: 1rem 0;
}

/* 压缩选项样式 */
.compression-options {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.compression-options h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.quality-control {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.quality-slider {
    display: flex;
    align-items: center;
    gap: 1rem;
}

input[type="range"] {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    background: #E5E5E5;
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
}

.quality-hint {
    font-size: 0.85rem;
    color: #86868B;
}

/* 预览区域样式优化 */
.preview-area {
    flex: 2;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.preview-image-container {
    position: relative;
    background: #f8f8f8;
    border-radius: var(--border-radius);
    overflow: hidden;
    min-height: 200px;
}

.preview-image-container img {
    width: 100%;
    height: auto;
    display: block;
}

.file-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #f0f0f0;
    color: #86868B;
    font-size: 0.9rem;
}

.compression-ratio {
    color: var(--primary-color);
    margin-left: 1rem;
}

/* 预览操作区域 */
.preview-actions {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.download-btn:hover {
    background: #0056b3;
    transform: translateY(-1px);
}

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

.download-btn svg {
    fill: currentColor;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .compression-container {
        flex-direction: column;
    }

    .compression-settings,
    .preview-area {
        width: 100%;
    }

    .preview-container {
        flex-direction: column;
        gap: 1rem;
    }
}

/* 预览模态框样式 */
.preview-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.preview-modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
}

.preview-modal-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--border-radius);
}

.close-preview {
    position: absolute;
    top: -40px;
    right: -40px;
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    padding: 10px;
}

/* 添加鼠标样式 */
.preview-image-container img {
    cursor: zoom-in;
}