/* 52stu图片处理工具 - 样式文件 */

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

:root {
    --bg: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-secondary: #64748b;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --success: #22c55e;
    --danger: #ef4444;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-lg: 12px;
}

[data-theme="dark"] {
    --bg: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --border: #334155;
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --primary: #60a5fa;
    --primary-hover: #93c5fd;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.3);
}

body {
    font-family: 'JetBrains Mono', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

/* Header - 固定顶部 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: box-shadow 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .header {
    background: rgba(30, 41, 59, 0.85);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
    transition: transform 0.3s ease;
}

.logo:hover .logo-icon {
    transform: scale(1.1) rotate(-5deg);
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.5px;
}

.header-actions {
    display: flex;
    gap: 8px;
}

.btn-icon-header {
    width: 38px;
    height: 38px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.btn-icon-header:hover {
    background: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-icon-header:hover svg {
    color: white;
}

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

.btn-icon-header svg {
    width: 18px;
    height: 18px;
    color: var(--text);
    transition: color 0.2s ease;
}

/* Tabs - 固定在Header下方 */
.tabs {
    position: fixed;
    top: 62px;
    left: 0;
    right: 0;
    z-index: 999;
    display: flex;
    gap: 2px;
    padding: 8px 24px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.tabs::-webkit-scrollbar {
    display: none;
}

[data-theme="dark"] .tabs {
    background: rgba(30, 41, 59, 0.95);
}

.tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.tab:hover {
    background: var(--bg-tertiary);
    color: var(--text);
}

.tab.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.tab-icon {
    width: 16px;
    height: 16px;
}

/* Main */
.main {
    padding: 100px 0 20px;
}

/* Dropzone */
.dropzone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 64px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.dropzone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.02) 0%, rgba(37, 99, 235, 0.08) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.dropzone:hover, .dropzone.dragover {
    border-color: var(--primary);
    border-style: solid;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.15);
}

.dropzone:hover::before, .dropzone.dragover::before {
    opacity: 1;
}

.dropzone-icon {
    width: 56px;
    height: 56px;
    color: var(--primary);
    margin-bottom: 16px;
    transition: transform 0.3s ease;
}

.dropzone:hover .dropzone-icon {
    transform: scale(1.1) translateY(-4px);
}

.dropzone-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 4px;
}

.dropzone-hint {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.dropzone-formats {
    font-size: 12px;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* File List */
.file-list-container {
    margin-top: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
}

.file-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.file-list-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
}

.file-list {
    max-height: 200px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.2s;
}

.file-item:last-child {
    border-bottom: none;
}

.file-item:hover {
    background: var(--bg-tertiary);
}

.file-item.active {
    background: rgba(99, 102, 241, 0.1);
}

.file-thumb {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.file-info {
    flex: 1;
    min-width: 0;
}

.file-name {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-meta {
    font-size: 11px;
    color: var(--text-secondary);
}

.file-dim {
    margin-left: 8px;
}

.file-result {
    font-size: 11px;
    color: var(--success);
    margin-left: 8px;
}

.file-remove {
    width: 24px;
    height: 24px;
    border: none;
    background: var(--danger);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.file-remove:hover {
    opacity: 1;
}

/* Preview */
.preview-container {
    margin-top: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(to right, var(--bg-tertiary), var(--bg-secondary));
}

.preview-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.preview-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.preview-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: repeating-conic-gradient(var(--bg-tertiary) 0% 25%, var(--bg) 0% 50%) 50% / 16px 16px;
    min-height: 200px;
    max-height: 450px;
    overflow: hidden;
}

#previewCanvas {
    max-width: 100%;
    max-height: 400px;
    border-radius: 4px;
    box-shadow: var(--shadow);
}

.avatar-active .preview-wrapper {
    background: #fff;
    background-image: 
        linear-gradient(45deg, #ddd 25%, transparent 25%),
        linear-gradient(-45deg, #ddd 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #ddd 75%),
        linear-gradient(-45deg, transparent 75%, #ddd 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

.avatar-active .result-preview {
    background: #fff;
    background-image: 
        linear-gradient(45deg, #ddd 25%, transparent 25%),
        linear-gradient(-45deg, #ddd 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #ddd 75%),
        linear-gradient(-45deg, transparent 75%, #ddd 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

.preview-info {
    padding: 10px 16px;
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
    border-top: 1px solid var(--border);
}

/* Options Panel */
.options-panel {
    margin-top: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 16px;
}

.options-panel.hidden {
    display: none;
}

.option-group {
    margin-bottom: 16px;
}

.option-group:last-child {
    margin-bottom: 0;
}

.option-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.option-value {
    color: var(--primary);
    font-weight: 600;
}

.option-hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Format Selector */
.format-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.format-btn {
    padding: 6px 12px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    font-family: inherit;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.format-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.format-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* Slider */
.slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: var(--shadow);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 14px;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.2s;
}

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

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

.btn-text {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    padding: 4px 8px;
    border-radius: 4px;
}

.btn-text:hover {
    background: rgba(99, 102, 241, 0.1);
}

.btn-icon {
    width: 16px;
    height: 16px;
}

.btn-preset {
    padding: 6px 12px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    font-family: inherit;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.btn-preset:hover, .btn-preset.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.btn-tool {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.btn-tool:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.btn-tool svg {
    width: 20px;
    height: 20px;
    color: var(--text);
}

.button-group {
    display: flex;
    gap: 8px;
}

/* Inputs */
.input-text, .input-small {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text);
    font-size: 13px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.input-text:focus, .input-small:focus {
    border-color: var(--primary);
}

.input-small {
    width: 80px;
}

/* Range Slider */
.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 3px solid var(--bg-secondary);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: transform 0.15s, background 0.15s;
    margin-top: -6px;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    background: var(--primary-hover);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 3px solid var(--bg-secondary);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.slider::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 3px;
}

.slider::-moz-range-track {
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
}

.resize-options {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.resize-x {
    color: var(--text-secondary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
}

/* Position Grid */
.position-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
    max-width: 140px;
}

.position-btn {
    width: 40px;
    height: 32px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.position-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.position-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* Color Picker */
.color-picker {
    display: flex;
    align-items: center;
    gap: 8px;
}

.color-picker input[type="color"] {
    width: 40px;
    height: 36px;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    padding: 2px;
}

/* Toggle Group */
.toggle-group {
    display: flex;
    gap: 4px;
}

.toggle-btn {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    font-family: inherit;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.toggle-btn:hover {
    border-color: var(--primary);
}

.toggle-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* Filters */
.filter-presets, .effect-presets, .frame-presets, .avatar-shapes, .collage-layouts {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.filter-btn, .effect-btn, .frame-btn, .shape-btn, .layout-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 11px;
    font-family: inherit;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.filter-preview, .effect-preview, .frame-preview {
    width: 36px;
    height: 36px;
    border-radius: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.shape-btn span {
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.filter-btn:hover, .effect-btn:hover, .frame-btn:hover, .shape-btn:hover, .layout-btn:hover {
    border-color: var(--primary);
}

.filter-btn.active, .effect-btn.active, .frame-btn.active, .shape-btn.active, .layout-btn.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.15);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.layout-preview {
    display: grid;
    gap: 2px;
    width: 40px;
    height: 30px;
}

.layout-preview span {
    background: var(--primary);
    border-radius: 2px;
}

/* Crop Presets Grid */
.crop-presets-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

/* Size Inputs */
.size-inputs {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.size-input-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.size-input-group label {
    font-size: 11px;
    color: var(--text-secondary);
}

.size-x {
    font-size: 18px;
    color: var(--text-secondary);
    margin-top: 16px;
}

.size-presets {
    display: flex;
    gap: 6px;
}

/* Watermark */
.watermark-config {
    padding: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 12px;
}

.watermark-preview {
    position: relative;
    display: inline-block;
    margin-top: 8px;
}

.watermark-preview img {
    max-width: 100px;
    max-height: 60px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

.btn-remove {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 20px;
    height: 20px;
    border: none;
    background: var(--danger);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    font-size: 12px;
    line-height: 1;
}

/* Avatar Shapes */
.shape-btn span {
    border: 2px solid currentColor;
}

/* Collage Layouts */
.layout-btn {
    flex-direction: row;
}

/* Action Bar */
.action-bar {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 16px 0;
}

/* Progress */
.progress-container {
    margin-top: 16px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

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

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.progress-text {
    font-size: 13px;
    color: var(--text);
}

.progress-percent {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
}

.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #3b82f6);
    border-radius: 4px;
    transition: width 0.3s;
    width: 0%;
}

/* Result */
.result-container {
    margin-top: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
}

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

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.result-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.result-actions {
    display: flex;
    gap: 8px;
}

.result-preview {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: repeating-conic-gradient(var(--bg-tertiary) 0% 25%, var(--bg) 0% 50%) 50% / 16px 16px;
    position: relative;
    min-height: 300px;
}

.avatar-preview .result-preview {
    background: #fff;
    background-image: 
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(-45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f0f0f0 75%),
        linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

.result-preview img {
    max-width: 100%;
    max-height: 400px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
}

.result-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border: none;
    background: var(--bg-secondary);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: all 0.2s ease;
    z-index: 10;
}

.result-nav:hover {
    background: var(--primary);
    transform: translateY(-50%) scale(1.1);
}

.result-nav:hover svg {
    color: white;
}

.result-nav svg {
    width: 20px;
    height: 20px;
    color: var(--text);
    transition: color 0.2s ease;
}

.result-nav-prev {
    left: 16px;
}

.result-nav-next {
    right: 16px;
}

.result-info {
    padding: 12px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    text-align: center;
    border-top: 1px solid var(--border);
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 1000;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    animation: slideIn 0.3s ease;
}

.toast-out {
    animation: slideOut 0.2s ease forwards;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

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

.toast.success .toast-icon { color: var(--success); }
.toast.error .toast-icon { color: var(--danger); }
.toast.info .toast-icon { color: var(--primary); }

.toast-message {
    font-size: 13px;
    color: var(--text);
}

/* Footer */
.footer {
    padding: 20px 0;
    text-align: center;
    border-top: 1px solid var(--border);
    margin-top: 20px;
}

.back-to-main {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s;
    margin-bottom: 8px;
}

.back-to-main:hover {
    color: var(--primary);
}

.copyright {
    color: var(--text-secondary);
    font-size: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 12px;
    }

    .tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 12px;
        -webkit-overflow-scrolling: touch;
    }

    .tab {
        flex-shrink: 0;
        padding: 6px 10px;
        font-size: 12px;
    }

    .tab-icon {
        width: 14px;
        height: 14px;
    }

    .dropzone {
        padding: 32px 16px;
    }

    .format-selector {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 4px;
    }

    .format-btn {
        flex-shrink: 0;
    }

    .filter-presets, .effect-presets {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 4px;
    }

    .filter-btn, .effect-btn {
        flex-shrink: 0;
    }

    .result-actions {
        flex-direction: column;
    }

    .position-grid {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 16px;
    }

    .header {
        padding: 12px 0;
    }

    .preview-wrapper {
        padding: 12px;
        min-height: 150px;
    }

    .button-group {
        flex-wrap: wrap;
    }

    .watermark-config .option-group {
        margin-bottom: 12px;
    }
}

/* 书签提示 */
.bookmark-hint {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.bookmark-hint-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 360px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.2s ease;
}

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

.bookmark-hint-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
}

.bookmark-hint-content p {
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-size: 14px;
    line-height: 1.6;
}

.bookmark-hint-content kbd {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 8px;
    font-family: inherit;
    font-size: 13px;
    color: var(--text);
}

.bookmark-hint-tip {
    font-size: 12px;
    color: var(--text-secondary);
    opacity: 0.8;
}

.bookmark-hint-close {
    margin-top: 20px;
    padding: 10px 24px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.2s;
}

.bookmark-hint-close:hover {
    background: var(--primary-hover);
}