/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f7f9fc;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    color: white;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

header h1 {
    color: white;
    margin-bottom: 15px;
    font-weight: 700;
    font-size: 2.5rem;
}

header p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    font-weight: 300;
}

/* 主要内容区域 */
main {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 上传区域样式 */
.upload-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.drop-area {
    border: 3px dashed #3498db;
    border-radius: 10px;
    padding: 40px 20px;
    text-align: center;
    background-color: #ecf0f1;
    transition: all 0.3s ease;
    cursor: pointer;
}

.drop-area:hover,
.drop-area.active {
    background-color: #d6eaf8;
    border-color: #2980b9;
}

.drop-area i {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 15px;
}

.drop-area p {
    margin-bottom: 15px;
    color: #7f8c8d;
}

.upload-btn {
    display: inline-block;
    background-color: #3498db;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.upload-btn:hover {
    background-color: #2980b9;
}

/* 文件夹路径输入样式 */
.folder-input-section {
    margin: 20px 0;
    padding: 20px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border: 1px solid #f0f0f0;
}

.folder-input-section label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
    color: #34495e;
}

.folder-input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.folder-path-input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.folder-path-input:focus {
    outline: none;
    border-color: #3498db;
}

.folder-btn {
    background-color: #27ae60;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.folder-btn:hover {
    background-color: #229954;
}

.folder-btn:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

/* 预览区域样式 */
.preview-container {
    background-color: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border: 1px solid #f0f0f0;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.image-count {
    background-color: #3498db;
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: 500;
}

.preview-container h3 {
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
    font-size: 1.2rem;
}

.preview-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    margin-bottom: 15px;
    max-height: 300px;
    overflow-y: auto;
    padding: 5px;
}

.preview-image-container {
    position: relative;
    border-radius: 5px;
    overflow: hidden;
    /* aspect-ratio: 1; */
    /* 移除此行以允许容器适应图片真实比例 */
}

.preview-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.preview-image-container:hover .preview-image {
    transform: scale(1.05);
}

.remove-image {
    position: absolute;
    top: 5px;
    right: 5px;
    background-color: rgba(231, 76, 60, 0.8);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.preview-image-container:hover .remove-image {
    opacity: 1;
}

.preview-controls {
    display: flex;
    justify-content: flex-end;
}

.control-btn {
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

.control-btn:hover {
    background-color: #c0392b;
}

/* 设置区域样式 */
.settings-section {
    background-color: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    text-align: center;
}

.settings-section h3 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-weight: 600;
    font-size: 1.2rem;
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    header {
        margin-bottom: 20px;
        padding: 20px 0;
    }

    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 1rem;
    }

    main {
        gap: 20px;
    }

    .settings-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .preview-images {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: 8px;
        max-height: 200px;
    }

    .action-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .primary-btn,
    .secondary-btn {
        min-width: auto;
        width: 100%;
    }

    .drop-area {
        padding: 30px 15px;
    }

    .drop-area i {
        font-size: 2.5rem;
    }

    .notification {
        left: 10px;
        right: 10px;
        max-width: none;
    }

    .loading-content {
        margin: 0 20px;
        min-width: auto;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 5px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .preview-images {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
        gap: 5px;
    }

    .drop-area {
        padding: 20px 10px;
    }

    .drop-area i {
        font-size: 2rem;
    }

    .size-inputs {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .radio-group {
        flex-direction: column;
        gap: 10px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .preview-image-container:hover .remove-image {
        opacity: 1;
    }

    .remove-image {
        opacity: 0.8;
        width: 28px;
        height: 28px;
        font-size: 14px;
    }

    .upload-btn {
        padding: 12px 24px;
        font-size: 1.1rem;
    }

    .primary-btn,
    .secondary-btn {
        padding: 18px 30px;
        font-size: 1.2rem;
    }

    input[type="range"] {
        height: 40px;
    }

    input[type="number"],
    select {
        padding: 12px;
        font-size: 1.1rem;
    }
}

.setting-group {
    margin-bottom: 15px;
}

.setting-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #34495e;
}

.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.radio-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.radio-group input[type="radio"] {
    margin-right: 8px;
}

.radio-group span {
    display: flex;
    align-items: center;
}

.radio-group i {
    margin-right: 5px;
}

input[type="range"],
input[type="number"],
input[type="color"],
select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

input[type="color"] {
    height: 40px;
    cursor: pointer;
}

#spacingValue {
    margin-left: 10px;
    font-size: 0.9rem;
    color: #7f8c8d;
}

.size-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 10px;
}

.maintain-ratio-option {
    margin-top: 5px;
}

.maintain-ratio-option label {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.maintain-ratio-option input[type="checkbox"] {
    margin-right: 8px;
}

.upload-options {
    display: flex;
    gap: 20px;
    flex-direction: column;
}

@media (min-width: 768px) {
    .upload-options {
        flex-direction: row;
        align-items: stretch;
    }
    
    .drop-area {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    
    .folder-select-btn {
        height: auto;
        min-height: 180px;
        width: 180px;
    }
}

.folder-select-btn {
    background-color: #27ae60;
    color: white;
    border: none;
    padding: 25px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 500;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.2);
}

.folder-select-btn i {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.folder-select-btn:hover {
    background-color: #229954;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(39, 174, 96, 0.3);
}

.action-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.primary-btn,
.secondary-btn,
.combo-btn {
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-width: 160px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.primary-btn {
    background-color: #3498db;
    color: white;
}

.primary-btn:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.secondary-btn {
    background-color: #2ecc71;
    color: white;
}

.secondary-btn:hover {
    background-color: #27ae60;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(46, 204, 113, 0.3);
}

.combo-btn {
    background: linear-gradient(135deg, #3498db 0%, #2ecc71 100%);
    color: white;
    min-width: 200px;
}

.combo-btn:hover {
    background: linear-gradient(135deg, #2980b9 0%, #27ae60 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.primary-btn:disabled,
.secondary-btn:disabled,
.combo-btn:disabled {
    background: #95a5a6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 结果区域样式 */
.result-section {
    background-color: white;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid #f0f0f0;
    display: none;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.result-section h3 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-weight: 600;
    font-size: 1.2rem;
}

.result-container {
    display: flex;
    justify-content: center;
    overflow: auto;
    max-width: 100%;
    max-height: 600px;
    border: 1px solid #eaeaea;
    border-radius: 5px;
    background-color: #f9f9f9;
}

#resultCanvas {
    max-width: 100%;
    height: auto;
}

/* 页脚样式 */
footer {
    text-align: center;
    padding: 20px 0;
    color: #7f8c8d;
    font-size: 0.9rem;
    border-top: 1px solid #eaeaea;
}

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: #34495e;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -60px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

/* 拖拽排序样式 */
.dragging {
    opacity: 0.5;
    transform: scale(0.95);
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, .3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 加载状态覆盖层 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-content {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    min-width: 250px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #f0f0f0;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 15px;
}

.progress-fill {
    height: 100%;
    background-color: #3498db;
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

/* 通知提示组件 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    max-width: 400px;
    animation: slideInRight 0.3s ease-out;
}

.notification-content {
    background-color: white;
    border-radius: 8px;
    padding: 15px 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    border-left: 4px solid #3498db;
    display: flex;
    align-items: center;
    gap: 12px;
}

.notification.success .notification-content {
    border-left-color: #2ecc71;
}

.notification.error .notification-content {
    border-left-color: #e74c3c;
}

.notification.warning .notification-content {
    border-left-color: #f39c12;
}

.notification-icon {
    font-size: 18px;
    flex-shrink: 0;
}

.notification.success .notification-icon::before {
    content: "✓";
    color: #2ecc71;
}

.notification.error .notification-icon::before {
    content: "✕";
    color: #e74c3c;
}

.notification.warning .notification-icon::before {
    content: "⚠";
    color: #f39c12;
}

.notification.info .notification-icon::before {
    content: "ℹ";
    color: #3498db;
}

.notification-message {
    flex: 1;
    color: #333;
    font-size: 14px;
    line-height: 1.4;
}

.notification-close {
    background: none;
    border: none;
    font-size: 18px;
    color: #999;
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notification-close:hover {
    color: #666;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }

    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

.notification.slide-out {
    animation: slideOutRight 0.3s ease-in forwards;
}