:root {
    --primary-color: #007AFF;
    --primary-hover: #0056b3;
    --background-color: #F5F5F7;
    --card-background: rgba(255, 255, 255, 0.95);
    --text-color: #1D1D1F;
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(135deg, #F5F5F7 0%, #E8E8E8 100%);
    color: var(--text-color);
    line-height: 1.5;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* 标题样式 */
header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
}

header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    background: linear-gradient(135deg, #1a1a1a 0%, #4a4a4a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

header p {
    color: #86868B;
    font-size: 1.2rem;
    font-weight: 500;
}

/* 上传区域样式 */
.upload-section {
    margin-bottom: 2rem;
}

.upload-area {
    background: var(--card-background);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    border: 2px dashed #E5E5E5;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}

.upload-area:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.upload-icon {
    width: 64px;
    height: 64px;
    fill: var(--primary-color);
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.upload-area:hover .upload-icon {
    transform: scale(1.1);
}

.upload-content p {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.upload-hint {
    color: #86868B;
    font-size: 1rem;
}

/* 预览区域样式 */
.preview-section {
    background: var(--card-background);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    animation: fadeIn 0.5s ease-out;
}

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

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

.preview-box {
    flex: 1;
    text-align: center;
}

.preview-box h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1D1D1F;
}

.image-container {
    margin: 1rem 0;
    background: rgba(245, 245, 247, 0.6);
    border-radius: var(--border-radius);
    padding: 1rem;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.image-container:hover {
    background: rgba(245, 245, 247, 0.8);
}

.image-container img {
    max-width: 100%;
    max-height: 300px;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

/* 控制区域样式 */
.controls {
    padding-top: 1.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

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

.quality-control label {
    font-weight: 500;
    min-width: 90px;
}

input[type="range"] {
    flex: 1;
    height: 6px;
    background: linear-gradient(to right, var(--primary-color) 0%, var(--primary-color) 80%, #E5E5E5 80%, #E5E5E5 100%);
    border-radius: 3px;
    -webkit-appearance: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: #FFFFFF;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

#qualityValue {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 60px;
}

.download-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.2);
}

.download-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 122, 255, 0.3);
}

.file-info {
    margin-top: 1rem;
    color: #86868B;
    font-size: 0.95rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    .preview-container {
        flex-direction: column;
    }

    .quality-control {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .quality-control label {
        text-align: center;
    }

    #qualityValue {
        text-align: center;
    }

    .download-btn {
        width: 100%;
    }
}

.images-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.image-card {
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.image-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.image-preview {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: #f5f5f7;
}

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

.image-info {
    padding: 1rem;
}

.file-name {
    font-weight: 500;
    margin-bottom: 0.5rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.size-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #86868B;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.card-actions button {
    flex: 1;
    padding: 0.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.compress-btn {
    background: var(--primary-color);
    color: white;
}

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

.delete-btn {
    background: #FF3B30;
    color: white;
}

.delete-btn:hover {
    background: #dc3545;
}

.batch-controls {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.primary-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.2);
}

.primary-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 122, 255, 0.3);
}

@media (max-width: 768px) {
    .images-grid {
        grid-template-columns: 1fr;
    }

    .batch-controls {
        flex-direction: column;
    }

    .batch-controls button {
        width: 100%;
    }
}

.control-group {
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.size-control {
    margin: 1.5rem 0;
}

.size-inputs {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.5rem;
}

.input-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-group input {
    width: 100px;
    padding: 0.5rem;
    border: 1px solid #E5E5E5;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.input-group input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.1);
}

.size-separator {
    color: #86868B;
    font-weight: 500;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-container input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.crop-control {
    margin-top: 1.5rem;
}

.crop-control select {
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.5rem;
    border: 1px solid #E5E5E5;
    border-radius: 8px;
    font-size: 1rem;
    background-color: white;
    cursor: pointer;
    transition: var(--transition);
}

.crop-control select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.1);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .size-inputs {
        flex-direction: column;
        align-items: stretch;
    }

    .input-group {
        width: 100%;
    }

    .input-group input {
        width: 100%;
    }
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    opacity: 1;
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 1200px;
    height: 90vh;
    margin: 2vh auto;
    display: flex;
    flex-direction: column;
}

.close-modal {
    position: absolute;
    right: 20px;
    top: 10px;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    z-index: 1001;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 50%;
    transition: var(--transition);
}

.close-modal:hover {
    background: rgba(0, 0, 0, 0.5);
    transform: scale(1.1);
}

#modalImage {
    max-width: 100%;
    max-height: calc(90vh - 60px);
    object-fit: contain;
    margin: auto;
}

.modal-info {
    color: white;
    padding: 1rem;
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    margin-top: 1rem;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.image-preview {
    cursor: zoom-in;
}

/* 添加图片悬停效果 */
.image-preview::after {
    content: '点击查看原图';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    opacity: 0;
    transition: var(--transition);
}

.image-preview:hover::after {
    opacity: 1;
}