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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* 确保 header 样式与 portal 一致 */
.header {
    padding: 1rem 0 !important;
}

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

/* Page Header (工具页面标题，区别于导航 header) */
.page-header {
    text-align: center;
    margin-bottom: 30px;
    margin-top: 20px;
}

.page-title {
    font-size: 32px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 10px;
}

.page-subtitle {
    font-size: 16px;
    color: #7f8c8d;
}

/* Upload Section */
.upload-section {
    margin-bottom: 30px;
}

.upload-area {
    border: 2px dashed #d0d0d0;
    border-radius: 8px;
    padding: 60px 20px;
    text-align: center;
    background-color: #fff;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover {
    border-color: #3498db;
    background-color: #f8f9fa;
}

.upload-area.dragover {
    border-color: #3498db;
    background-color: #e8f4f8;
}

.upload-icon {
    width: 64px;
    height: 64px;
    color: #95a5a6;
    margin: 0 auto 20px;
}

.upload-text {
    font-size: 18px;
    color: #34495e;
    margin-bottom: 10px;
}

.upload-or {
    font-size: 14px;
    color: #95a5a6;
    margin-bottom: 20px;
}

.upload-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.button-icon {
    width: 20px;
    height: 20px;
}

.privacy-notice {
    font-size: 12px;
    color: #95a5a6;
    margin-top: 20px;
}

/* Preview Section */
.preview-section {
    margin-bottom: 30px;
}

.preview-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.preview-panel {
    background-color: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background-color: #f8f9fa;
    border-bottom: 1px solid #e0e0e0;
}

.panel-icon {
    width: 20px;
    height: 20px;
    color: #7f8c8d;
}

.panel-title {
    font-size: 16px;
    font-weight: 500;
    color: #2c3e50;
}

.preview-content {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.preview-image {
    max-width: 100%;
    max-height: 500px;
    object-fit: contain;
    display: none;
}

.preview-image.active {
    display: block;
}

.preview-placeholder {
    text-align: center;
    color: #bdc3c7;
}

.placeholder-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 10px;
    opacity: 0.5;
}

/* Settings Section */
.settings-section {
    background-color: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 30px;
}

.settings-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid #ecf0f1;
}

.settings-icon {
    width: 24px;
    height: 24px;
    color: #3498db;
}

.settings-title {
    font-size: 20px;
    font-weight: 600;
    color: #2c3e50;
}

.settings-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

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

.setting-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-label {
    font-size: 14px;
    font-weight: 500;
    color: #34495e;
}

.setting-input,
.setting-select {
    padding: 10px 12px;
    border: 1px solid #d0d0d0;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.setting-input:focus,
.setting-select:focus {
    outline: none;
    border-color: #3498db;
}

/* Slider */
.slider-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: #e0e0e0;
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #3498db;
    cursor: pointer;
    transition: background 0.3s ease;
}

.slider::-webkit-slider-thumb:hover {
    background: #2980b9;
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #3498db;
    cursor: pointer;
    border: none;
    transition: background 0.3s ease;
}

.slider::-moz-range-thumb:hover {
    background: #2980b9;
}

.slider-value {
    min-width: 60px;
    text-align: right;
    font-size: 14px;
    color: #7f8c8d;
    font-weight: 500;
}

/* Color Picker */
.color-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.color-picker {
    width: 50px;
    height: 40px;
    border: 1px solid #d0d0d0;
    border-radius: 6px;
    cursor: pointer;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker::-webkit-color-swatch {
    border: none;
    border-radius: 5px;
}

.color-input {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid #d0d0d0;
    border-radius: 6px;
    font-size: 14px;
    font-family: monospace;
}

/* Radio Group */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: #34495e;
}

.radio-label input[type="radio"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Download Button */
.download-button {
    padding: 12px 24px;
    background-color: #27ae60;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-top: 10px;
}

.download-button:hover {
    background-color: #229954;
}

.download-button:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

/* Responsive */
@media (max-width: 768px) {
    .preview-container {
        grid-template-columns: 1fr;
    }
    
    .settings-content {
        grid-template-columns: 1fr;
    }
    
    .title {
        font-size: 24px;
    }
}