/* 全局样式 */
:root {
    --primary-color: #0071e3;
    --secondary-color: #86b7fe;
    --light-gray: #f5f5f7;
    --medium-gray: #d2d2d7;
    --dark-gray: #86868b;
    --text-color: #1d1d1f;
    --success-color: #34c759;
    --danger-color: #ff3b30;
    --border-radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: #fff;
    color: var(--text-color);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 页头样式 */
header {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--medium-gray);
    padding: 16px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.back-home {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 12px;
    border-radius: 10px;
    background: var(--light-gray);
    border: 1px solid var(--medium-gray);
    color: var(--text-color);
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    transition: background-color 0.2s ease;
}

.back-home:hover {
    background-color: #e5e5ea;
}

h1 {
    font-size: 20px;
    font-weight: 600;
}

.logo-icon {
    fill: var(--primary-color);
}

h1 {
    font-size: 20px;
    font-weight: 600;
}

/* 主要内容区域 */
main {
    flex: 1;
    padding: 24px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* 上传区域样式 */
.upload-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.upload-area {
    border: 2px dashed var(--medium-gray);
    border-radius: var(--border-radius);
    background-color: var(--light-gray);
    padding: 48px;
    text-align: center;
    width: 100%;
    max-width: 600px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(0, 113, 227, 0.05);
}

.upload-icon {
    fill: var(--dark-gray);
    margin-bottom: 16px;
}

.file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    overflow: hidden;
}

/* 编辑器容器样式 */
.editor-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 24px;
    margin-top: 24px;
}

.editor-container.hidden {
    display: none;
}

/* 工具栏样式 */
.toolbox {
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    padding: 16px;
    height: fit-content;
}

.tool-group {
    margin-bottom: 24px;
}

.tool-group h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tool-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.size-input {
    width: 80px;
    padding: 6px 12px;
    border-radius: var(--border-radius);
    border: 1px solid var(--medium-gray);
    font-size: 14px;
}

.tool-btn {
    background-color: var(--light-gray);
    border: 1px solid var(--medium-gray);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.tool-btn:hover {
    background-color: #e5e5ea;
}

input[type="range"] {
    width: 100%;
    -webkit-appearance: none;
    height: 6px;
    background: var(--medium-gray);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    border: 1px solid var(--medium-gray);
    cursor: pointer;
    box-shadow: var(--shadow);
}

.format-options {
    display: flex;
    gap: 16px;
}

.action-buttons {
    display: flex;
    gap: 12px;
    margin-top: 32px;
}

.reset-btn {
    background-color: white;
    border: 1px solid var(--medium-gray);
    color: var(--text-color);
    padding: 10px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    flex: 1;
    transition: all 0.2s ease;
}

.reset-btn:hover {
    background-color: var(--light-gray);
}

.download-btn {
    background-color: var(--primary-color);
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    flex: 1;
    transition: all 0.2s ease;
}

.download-btn:hover {
    background-color: #0062cc;
}

/* 预览区域样式 */
.preview-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: relative;
}

.preview-wrapper {
    background-color: #f9f9f9;
    background-image: linear-gradient(45deg, #e0e0e0 25%, transparent 25%),
        linear-gradient(-45deg, #e0e0e0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e0e0e0 75%),
        linear-gradient(-45deg, transparent 75%, #e0e0e0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    border-radius: var(--border-radius);
    min-height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid #ccc;
}

canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

.image-info {
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    padding: 12px 16px;
    font-size: 14px;
    display: flex;
    justify-content: space-between;
}

/* 工具提示样式 */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

input[type="checkbox"] {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 4px;
    border: 1px solid var(--medium-gray);
    background-color: white;
    cursor: pointer;
    position: relative;
}

input[type="checkbox"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

input[type="checkbox"]:checked:after {
    content: "";
    position: absolute;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    top: 3px;
    left: 6px;
    transform: rotate(45deg);
}

/* 页脚样式 */
footer {
    padding: 24px;
    text-align: center;
    color: var(--dark-gray);
    font-size: 14px;
    border-top: 1px solid var(--medium-gray);
}

.site-footer {
    margin-top: auto;
    padding: 14px 10px 6px;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    column-gap: 14px;
    row-gap: 8px;
    text-align: center;
    font-size: 12px;
    color: #666;
}

.footer-contact,
.footer-icp {
    white-space: nowrap;
}

.site-footer a {
    color: inherit;
    text-decoration: none;
}

.site-footer a:hover {
    text-decoration: underline;
}

.footer-email {
    user-select: text;
}

.footer-copy-btn {
    margin-left: 0;
    padding: 3px 8px;
    border-radius: 999px;
    border: 1px solid #ccc;
    background: #f5f5f5;
    color: #444;
    cursor: pointer;
    font-size: 12px;
    line-height: 1.2;
    white-space: nowrap;
}

.footer-copy-btn:hover {
    background: #e9e9e9;
}

/* 辅助类 */
.hidden {
    display: none !important;
}

/* 裁剪区域样式 */
.crop-overlay {
    position: absolute;
    border: 2px dashed white;
    background-color: rgba(0, 0, 0, 0.3);
    cursor: move;
    z-index: 10;
}

.crop-handle {
    width: 10px;
    height: 10px;
    background-color: white;
    border: 1px solid var(--dark-gray);
    position: absolute;
    z-index: 11;
}

.crop-handle-nw {
    top: -5px;
    left: -5px;
    cursor: nw-resize;
}

.crop-handle-ne {
    top: -5px;
    right: -5px;
    cursor: ne-resize;
}

.crop-handle-sw {
    bottom: -5px;
    left: -5px;
    cursor: sw-resize;
}

.crop-handle-se {
    bottom: -5px;
    right: -5px;
    cursor: se-resize;
}

/* 预览反馈 */
.preview-feedback {
    position: absolute;
    top: 20px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 12px;
    z-index: 100;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.preview-feedback.active {
    opacity: 1;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .editor-container {
        grid-template-columns: 1fr;
    }
    
    .image-info {
        flex-direction: column;
        gap: 8px;
    }
}

/* 调试按钮 */
.debug-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    z-index: 1000;
}