:root {
    color-scheme: light dark;
    --side-pad: max(16px, env(safe-area-inset-left));
    --side-pad-r: max(16px, env(safe-area-inset-right));
    --safe-bottom: max(16px, env(safe-area-inset-bottom));
    --safe-top: max(16px, env(safe-area-inset-top));

    /* Apple HIG Design System - Typography - Optimized for Chinese */
    --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", ui-sans-serif, -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", sans-serif;
    --font-chinese: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
    --size-title: clamp(22px, 3.2vw, 28px);  /* 对应 SF Pro Display */
    --size-sub: clamp(17px, 2vw, 20px);      /* 小标题/按钮 */
    --size-body: 16px;                        /* ≥11pt */
    --size-caption: 13px;

    /* Professional Design System Colors - Light mode */
    --bg: #ffffff;
    --surface: #ffffff;
    --surface-secondary: #f6f8fa;
    --surface-tertiary: #f1f3f4;

    /* Text hierarchy with WCAG AA compliant contrast - Light mode */
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --text-tertiary: #656d76;
    --text-muted: #8c959f;

    /* Border system with defined contrast - Light mode */
    --border-light: #d0d7de;
    --border-medium: #afb8c1;
    --border-strong: #8c959f;

    /* Brand and interaction - iOS Blue */
    --brand-primary: #007AFF;
    --brand-secondary: #5AC8FA;
    --brand-tertiary: #64D2FF;
    --brand-bg: color-mix(in oklab, #007AFF 12%, Canvas 88%);
    --brand-hover: #005FCC;

    /* Semantic colors - iOS system colors */
    --success: #34C759;
    --success-bg: color-mix(in oklab, #34C759 12%, Canvas 88%);
    --danger: #FF3B30;
    --danger-bg: color-mix(in oklab, #FF3B30 12%, Canvas 88%);
    --warning: #FF9500;
    --warning-bg: color-mix(in oklab, #FF9500 12%, Canvas 88%);
    --info: #007AFF;
    --info-bg: color-mix(in oklab, #007AFF 12%, Canvas 88%);

    /* Apple Materials & Depth */
    --shadow-xs: 0 1px 2px 0 color-mix(in oklab, CanvasText 8%, transparent);
    --shadow-sm: 0 1px 3px 0 color-mix(in oklab, CanvasText 12%, transparent), 0 1px 2px -1px color-mix(in oklab, CanvasText 8%, transparent);
    --shadow-md: 0 4px 6px -1px color-mix(in oklab, CanvasText 15%, transparent), 0 2px 4px -2px color-mix(in oklab, CanvasText 12%, transparent);
    --shadow-lg: 0 10px 15px -3px color-mix(in oklab, CanvasText 18%, transparent), 0 4px 6px -4px color-mix(in oklab, CanvasText 15%, transparent);
    --shadow-strong: 0 12px 30px color-mix(in oklab, CanvasText 25%, transparent);

    /* Grid system - 8pt grid */
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    --spacing-12: 48px;

    /* Border radius - iOS style */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --radius-xl: 12px;
    --radius-xxl: 16px;

    /* Apple Standard Easing Functions */
    --ease-standard: cubic-bezier(0.42, 0, 0.58, 1);
    --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-in: cubic-bezier(0.42, 0, 1, 1);
    --ease-interactive: cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Dark mode professional colors - Enhanced contrast */
        --bg: #0d1117;
        --surface: #21262d;
        --surface-secondary: #30363d;
        --surface-tertiary: #484f58;

        /* Dark text hierarchy - WCAG AA compliant */
        --text-primary: #f6f8fa;
        --text-secondary: #c9d1d9;
        --text-tertiary: #8b949e;
        --text-muted: #6e7681;

        /* Dark borders */
        --border-light: #30363d;
        --border-medium: #21262d;
        --border-strong: #484f58;

        /* Dark brand colors - iOS Blue (maintain hue consistency) */
        --brand-primary: #0A84FF;
        --brand-secondary: #64D2FF;
        --brand-tertiary: #40A7FF;
        --brand-bg: color-mix(in oklab, #0A84FF 15%, Canvas 85%);
        --brand-hover: #409CFF;

        /* Dark semantic colors */
        --success: #3fb950;
        --success-bg: #033a16;
        --danger: #f85149;
        --danger-bg: #490202;
        --warning: #d29922;
        --warning-bg: #341a00;
        --info: #58a6ff;
        --info-bg: #0c2d6b;
    }
}

/* 兜底：当 <html data-theme="dark"> 时强制暗色变量 */
:root[data-theme="dark"] {
    /* Dark mode professional colors - Enhanced contrast */
    --bg: #0d1117;
    --surface: #21262d;
    --surface-secondary: #30363d;
    --surface-tertiary: #484f58;

    /* Dark text hierarchy - WCAG AA compliant */
    --text-primary: #f6f8fa;
    --text-secondary: #c9d1d9;
    --text-tertiary: #8b949e;
    --text-muted: #6e7681;

    /* Dark borders */
    --border-light: #30363d;
    --border-medium: #21262d;
    --border-strong: #484f58;

    /* Dark brand colors - iOS Blue (maintain hue consistency) */
    --brand-primary: #0A84FF;
    --brand-secondary: #64D2FF;
    --brand-tertiary: #40A7FF;
    --brand-bg: color-mix(in oklab, #0A84FF 15%, Canvas 85%);
    --brand-hover: #409CFF;

    /* Dark semantic colors */
    --success: #3fb950;
    --success-bg: #033a16;
    --danger: #f85149;
    --danger-bg: #490202;
    --warning: #d29922;
    --warning-bg: #341a00;
    --info: #58a6ff;
    --info-bg: #0c2d6b;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100svh;
    min-height: 100dvh;
    overflow: auto;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: var(--size-body);
    letter-spacing: -0.01em;
}

/* Typography Hierarchy - Optimized for Chinese */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-chinese);
    font-weight: 600; /* Heavier weight for Chinese readability */
    letter-spacing: 0.02em; /* Better spacing for Chinese characters */
    line-height: 1.7; /* Improved line height for Chinese */
    margin: 0;
}

h1 { font-size: var(--size-title); font-weight: 700; }
h2 { font-size: var(--size-sub); font-weight: 600; }
h3 { font-size: var(--size-body); font-weight: 600; }

label, .meta {
    font-size: var(--size-caption);
    color: var(--text-tertiary);
    font-weight: 500;
}

/* Main App Container - Professional Layout */
.app-container {
    display: grid;
    grid-template-columns: minmax(320px, 420px) 1fr;
    min-height: 100vh;
    min-height: 100svh;
    min-height: 100dvh;
    background: var(--bg);
    gap: clamp(12px, 2vw, 32px);
    padding: clamp(12px, 3vw, 24px);
    padding-left: max(clamp(12px, 3vw, 24px), env(safe-area-inset-left));
    padding-right: max(clamp(12px, 3vw, 24px), env(safe-area-inset-right));
    padding-top: max(clamp(12px, 3vw, 24px), env(safe-area-inset-top));
    padding-bottom: max(clamp(12px, 3vw, 24px), env(safe-area-inset-bottom));
}

/* Left Panel - Controls */
.left-panel {
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    min-width: 0; /* Allow shrinking in grid */
}

.left-panel header {
    background: var(--surface);
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
    padding: var(--spacing-6);
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

.left-panel header h1 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-1);
    color: var(--text-primary);
}

.subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 400;
}

.controls-section {
    padding: var(--spacing-6);
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-gutter: stable;
    overscroll-behavior: contain;
}

/* Right Panel - Results & History */
.right-panel {
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    min-width: 0; /* Allow shrinking in grid */
}

.history-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border-light);
    padding: var(--spacing-4) var(--spacing-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(16px) saturate(1.2);
    -webkit-backdrop-filter: blur(16px) saturate(1.2);
    background: color-mix(in oklab, var(--surface) 85%, transparent);
    border-bottom: 1px solid color-mix(in oklab, var(--border-light) 60%, transparent);
}

.history-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.history-controls {
    display: flex;
    gap: var(--spacing-2);
}

.history-btn {
    background: var(--surface-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
}

.history-btn:hover {
    background: var(--surface-tertiary);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

/* Tabs */
.history-tabs {
    display: flex;
    background: var(--surface-secondary);
    border-bottom: 1px solid var(--border-light);
    padding: var(--spacing-1);
    gap: var(--spacing-1);
}

.tab-btn {
    flex: 1;
    min-height: 44px;
    padding: var(--spacing-3) var(--spacing-4);
    background: transparent;
    color: var(--text-secondary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
}

.tab-btn:hover {
    background: var(--surface-tertiary);
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--brand-primary);
    background: var(--brand-bg);
    border: 1px solid var(--brand-primary);
}

.tab-content {
    display: none;
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-gutter: stable;
    overscroll-behavior: contain;
    padding: var(--spacing-6);
}

.tab-content.active {
    display: block;
}

/* Results Grid - Large images for current generation */
.results-grid {
    display: flex;
    flex-direction: column;
    gap: 25px;
    align-items: center;
}

.results-grid .generation-item {
    width: 100%;
    max-width: 800px;
    min-height: 400px;
}

.results-grid .generation-item img {
    width: 100%;
    height: auto;
    max-height: 600px;
    object-fit: contain;
}

/* History Grid - Adaptive thumbnails with optimal density */
.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: clamp(12px, 1vw, 16px);
    padding: var(--spacing-1);
}

.history-grid .generation-item {
    max-height: 250px;
}

.history-grid .generation-item img {
    max-height: 200px;
    object-fit: cover;
}

.generation-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    box-shadow: var(--shadow-xs);
}

.generation-item:hover {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-md);
}

.generation-item img {
    width: 100%;
    height: auto;
    display: block;
}

.generation-meta {
    padding: var(--spacing-3);
    background: var(--surface-secondary);
    border-top: 1px solid var(--border-light);
    font-size: 12px;
    color: var(--text-secondary);
}

.generation-meta .timestamp {
    display: block;
    margin-bottom: var(--spacing-1);
    font-weight: 500;
    color: var(--text-tertiary);
}

.generation-meta .prompt-preview {
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-secondary);
    line-height: 1.3;
}

/* Generation footer with actions bar */
.generation-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.6) 70%, transparent 100%);
    padding: var(--spacing-3) var(--spacing-2);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.generation-item:hover .generation-footer {
    opacity: 1;
}

/* Always show on touch devices */
@media (hover: none) and (pointer: coarse) {
    .generation-footer {
        opacity: 1;
        background: linear-gradient(to top, rgba(0, 0, 0, 0.75) 0%, rgba(0, 0, 0, 0.5) 70%, transparent 100%);
    }
}

.generation-timestamp {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    text-align: center;
}

.generation-actions-bar {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2);
}

.action-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 18px;
    color: white;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-icon:hover {
    background: rgba(255, 255, 255, 0.35);
    transform: scale(1.1);
}

.action-icon:active {
    transform: scale(0.95);
}

/* Textarea size controls */
.textarea-size-controls {
    display: flex;
    gap: 4px;
}

.size-control-btn {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border-medium);
    background: var(--surface);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
}

.size-control-btn:hover {
    background: var(--brand-primary);
    color: white;
    border-color: var(--brand-primary);
    transform: scale(1.05);
}

.size-control-btn:active {
    transform: scale(0.95);
}

/* Mobile optimized size controls */
@media (max-width: 768px) {
    .size-control-btn {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }

    .textarea-size-controls {
        gap: 6px;
    }

    .form-group textarea {
        font-size: 16px;
    }
}

/* 极小屏幕优化 */
@media (max-width: 380px) {
    .prompt-with-action {
        flex-direction: column;
    }

    .generate-btn-inline {
        min-height: 50px;
        width: 100%;
        flex-direction: row;
    }

    .prompt-with-action textarea {
        min-height: 100px;
    }
}

/* ============================= */
/* 结构化指令编辑器 (SDE) 样式
/* ============================= */

/* 模式容器 */
.prompt-mode {
    transition: opacity 0.3s var(--ease-out),
                transform 0.3s var(--ease-out);
}

/* 提示词输入框与生成按钮组合布局 (移动端) */
.prompt-with-action {
    display: flex;
    gap: var(--spacing-3);
    align-items: flex-start;
}

.prompt-with-action textarea {
    flex: 1;
    min-height: 120px;
    font-size: 16px;
}

.generate-btn-inline {
    min-height: 120px;
    min-width: 80px;
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--brand-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

.generate-btn-inline:hover {
    background: var(--brand-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.generate-btn-inline:active {
    transform: translateY(0);
}

.generate-btn-inline:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--text-muted);
}

.generate-btn-inline .spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* SDE模块样式 */
.sde-module {
    padding: var(--spacing-4);
    background: var(--surface-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    margin-bottom: var(--spacing-4);
}

.sde-module:last-child {
    margin-bottom: 0;
}

.sde-module label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--size-sub);
    margin-bottom: var(--spacing-2);
}

/* 模块一：参考协议选择器 */
.sde-module select {
    width: 100%;
    padding: var(--spacing-3);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text-primary);
    font-size: var(--size-body);
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
}

.sde-module select:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px var(--brand-bg);
}

/* 模块二：场景描述输入 */
.sde-module textarea {
    width: 100%;
    padding: var(--spacing-3);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text-primary);
    font-size: var(--size-body);
    font-family: var(--font-chinese);
    line-height: 1.6;
    resize: vertical;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
}

.sde-module textarea:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px var(--brand-bg);
}

.sde-module textarea::placeholder {
    color: var(--text-muted);
}

/* 模块三：风格化协议复选框 */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    border-radius: 4px;
    border: 2px solid var(--border-medium);
    background: var(--surface);
    cursor: pointer;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    position: relative;
}

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

.checkbox-group input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.checkbox-group label {
    cursor: pointer;
    user-select: none;
    font-weight: 500;
    margin: 0;
}

/* 提示词预览区域 */
.sde-preview {
    background: var(--surface-tertiary);
    border: 2px dashed var(--border-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
}

.prompt-preview-textarea {
    background: var(--surface);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    font-style: italic;
    cursor: not-allowed;
}

.sde-preview label {
    color: var(--brand-primary);
    font-weight: 600;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .sde-module {
        padding: var(--spacing-3);
        margin-bottom: var(--spacing-3);
    }

    .sde-module label {
        font-size: 14px;
    }

    .checkbox-group input[type="checkbox"] {
        width: 20px;
        height: 20px;
    }

    .checkbox-group label {
        font-size: 14px;
    }
}

/* 暗色模式适配 */
@media (prefers-color-scheme: dark) {
    .sde-module {
        background: rgba(255, 255, 255, 0.03);
        border-color: rgba(255, 255, 255, 0.1);
    }

    .checkbox-group input[type="checkbox"] {
        border-color: rgba(255, 255, 255, 0.3);
        background: rgba(255, 255, 255, 0.05);
    }

    .prompt-preview-textarea {
        background: rgba(0, 0, 0, 0.2);
        border-color: rgba(255, 255, 255, 0.1);
    }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-12) var(--spacing-6);
    color: var(--text-tertiary);
}

.empty-state p {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: var(--spacing-2);
    color: var(--text-secondary);
}

.empty-state small {
    font-size: 13px;
    color: var(--text-tertiary);
    line-height: 1.4;
}

/* Enhanced Empty State */
.empty-state-enhanced {
    text-align: center;
    padding: var(--spacing-12) var(--spacing-8);
    background: linear-gradient(135deg, #faf5ff 0%, #ffffff 100%);
    border: 2px dashed var(--border-light);
    border-radius: var(--radius-xl);
    max-width: 700px;
    margin: 0 auto;
}

.empty-icon {
    font-size: 80px;
    margin-bottom: var(--spacing-6);
    animation: float 3s ease-in-out infinite;
    display: inline-block;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.empty-state-enhanced h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-3);
}

.empty-state-enhanced > p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

.quick-examples {
    margin-bottom: var(--spacing-8);
}

.quick-examples h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-4);
}

.example-prompt {
    display: inline-block;
    margin: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    background: white;
    border: 2px solid var(--brand-primary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    color: var(--brand-primary);
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    min-height: 44px;
    min-width: 44px;
}

.example-prompt:hover {
    background: var(--brand-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.example-prompt:active {
    transform: translateY(0);
}

.feature-hints {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
    flex-wrap: wrap;
}

.feature-hints span {
    font-size: 14px;
    color: var(--text-secondary);
    padding: var(--spacing-2) var(--spacing-4);
    background: rgba(124, 58, 237, 0.08);
    border-radius: var(--radius-md);
    border: 1px solid rgba(124, 58, 237, 0.15);
}

@media (max-width: 768px) {
    .empty-state-enhanced {
        padding: var(--spacing-8) var(--spacing-4);
    }

    .empty-icon {
        font-size: 60px;
    }

    .empty-state-enhanced h3 {
        font-size: 20px;
    }

    .example-prompt {
        display: block;
        width: 100%;
        margin: var(--spacing-2) 0;
    }

    .feature-hints {
        flex-direction: column;
        gap: var(--spacing-2);
    }

    .feature-hints span {
        width: 100%;
    }
}

/* Generation Info */
.generation-info {
    background: var(--brand-bg);
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    font-size: 0.85rem;
    color: #ccc;
}

/* Cards */
.card {
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-5);
    margin-bottom: var(--spacing-4);
    box-shadow: var(--shadow-xs);
    transition: border-color 0.2s ease;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-4);
}

.card-header h2 {
    color: var(--text-primary);
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.settings-toggle-btn {
    min-height: 44px;
    min-width: 44px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--brand-primary);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-sm);
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    display: flex;
    align-items: center;
    justify-content: center;
}

.settings-toggle-btn:hover {
    background: var(--brand-bg);
    color: var(--brand-hover);
}

.settings-toggle-btn:focus-visible {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

.card.collapsed .settings-content {
    display: none;
}

.card.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.toggle-icon {
    color: var(--brand-primary);
    transition: transform 0.3s;
    font-size: 0.8rem;
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-4);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-3);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: 14px;
    background: var(--surface);
    color: var(--text-primary);
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px var(--brand-bg);
}

.form-group textarea {
    resize: vertical;
    font-family: inherit;
    font-size: 15px;
    line-height: 1.6;
}

.form-group input[type="file"] {
    padding: 8px;
    background: var(--surface-secondary);
    border: 2px dashed var(--border-light);
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
}

.help-text {
    display: block;
    margin-top: var(--spacing-1);
    font-size: 12px;
    color: var(--text-tertiary);
    line-height: 1.4;
}

.help-text a {
    color: var(--brand-primary);
    text-decoration: none;
}

.help-text a:hover {
    text-decoration: underline;
}

/* Settings Grid */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-4);
}

/* Image Preview */
.image-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: var(--spacing-3);
    margin-top: var(--spacing-3);
}

@media (max-width: 768px) {
    .image-preview {
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        gap: var(--spacing-2);
    }
}

.image-preview-item {
    position: relative;
    border-radius: 6px;
    overflow: hidden;
    background: var(--surface-secondary);
    aspect-ratio: 1;
    border: 2px solid var(--border-light);
    transition: opacity 0.3s var(--ease-out),
                transform 0.3s var(--ease-out);
}

.image-preview-item.uploading {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.1);
}

.image-preview-item.uploaded {
    border-color: var(--success);
    box-shadow: 0 0 0 2px color-mix(in oklab, var(--success) 10%, transparent);
}

.image-preview-item.upload-failed {
    border-color: var(--danger);
    box-shadow: 0 0 0 2px color-mix(in oklab, var(--danger) 10%, transparent);
}

.image-preview-item:hover {
    border-color: var(--brand-primary);
    transform: scale(1.05);
    box-shadow: 0 4px 8px color-mix(in oklab, var(--brand-primary) 20%, transparent);
}

.image-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.image-preview-item:hover img {
    opacity: 0.95;
}

.image-preview-item .remove-btn {
    position: absolute;
    top: 2px;
    right: 2px;
    background: rgba(255, 59, 48, 0.9);
    color: white;
    border: none;
    border-radius: 12px;
    min-width: 44px;
    min-height: 44px;
    width: 44px;
    height: 44px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    transition: background-color 0.18s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 2px 8px rgba(255, 59, 48, 0.25);
}

.image-preview-item .remove-btn:hover {
    background: rgba(255, 59, 48, 1);
    transform: scale(1.1);
}

/* Individual image upload status */
.image-upload-status {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    padding: 4px;
    font-size: 10px;
    text-align: center;
    transition: opacity 0.3s ease;
    z-index: 3;
}

.upload-progress-mini {
    height: 3px;
    background: var(--surface-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 2px;
}

.upload-progress-mini-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--brand-primary), var(--brand-hover));
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 0;
}

.uploaded .upload-progress-mini-bar {
    background: linear-gradient(90deg, var(--success), var(--success));
}

.upload-failed .upload-progress-mini-bar {
    background: linear-gradient(90deg, var(--danger), var(--danger));
}

.upload-status-text {
    display: block;
    color: var(--text-secondary);
    font-weight: 500;
}

.uploaded .upload-status-text {
    color: var(--success);
}

.upload-failed .upload-status-text {
    color: var(--danger);
}

/* Loading Preview */
.loading-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-secondary);
    border: 2px dashed var(--border-light);
}

.loading-placeholder {
    text-align: center;
    padding: 10px;
}

.loading-placeholder .spinner {
    width: 24px;
    height: 24px;
    margin: 0 auto 6px;
    border: 2px solid rgba(118, 75, 162, 0.2);
    border-top-color: var(--brand-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-placeholder p {
    font-size: 0.7rem;
    color: #666;
    margin: 0;
    word-break: break-all;
    max-width: 90px;
}

/* Buttons */
.generate-btn {
    width: 100%;
    padding: var(--spacing-4) var(--spacing-5);
    background: var(--brand-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    box-shadow: var(--shadow-sm);
}

.generate-btn:hover {
    background: var(--brand-hover);
    box-shadow: var(--shadow-md);
}

.generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--text-muted);
}

.clear-all-btn {
    min-height: 44px;
    padding: 5px 10px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.3s var(--ease-out),
                transform 0.3s var(--ease-out);
}

.clear-all-btn:hover {
    background: var(--danger);
    transform: translateY(-1px);
}

/* Status Messages */
.status-message {
    margin-top: var(--spacing-4);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-md);
    display: none;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid transparent;
}

.status-message.info {
    background: var(--info-bg);
    color: var(--info);
    border-color: var(--info);
    display: block;
}

.status-message.success {
    background: var(--success-bg);
    color: var(--success);
    border-color: var(--success);
    display: block;
}

.status-message.error {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger);
    display: block;
}

.status-message.warning {
    background: var(--warning-bg);
    color: var(--warning);
    border-left: 4px solid var(--warning);
    display: block;
}

/* Progress Logs */
.progress-logs {
    margin-top: 10px;
    padding: 10px;
    background: var(--surface-secondary);
    border-radius: 6px;
    max-height: 150px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-gutter: stable;
    display: none;
    font-size: 0.75rem;
}

.progress-logs.active {
    display: block;
}

.progress-logs .log-entry {
    padding: 3px 0;
    color: #666;
    border-bottom: 1px solid var(--border-light);
}

.progress-logs .log-entry:last-child {
    border-bottom: none;
}

/* Spinner Animation */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Flash Animation */
@keyframes flash {
    0% {
        background-color: rgba(118, 75, 162, 0.1);
    }
    50% {
        background-color: rgba(118, 75, 162, 0.2);
        border-color: var(--brand-primary);
    }
    100% {
        background-color: rgba(118, 75, 162, 0.1);
    }
}

/* Sidebar Toggle Button (initially hidden) */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: max(var(--spacing-4), env(safe-area-inset-top));
    left: max(var(--spacing-4), env(safe-area-inset-left));
    z-index: 1000;
    background: var(--brand-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    width: 48px;
    height: 48px;
    min-width: 44px;
    min-height: 44px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    font-size: 18px;
    align-items: center;
    justify-content: center;
}

.sidebar-toggle:hover {
    background: var(--brand-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(124, 58, 237, 0.4);
}

/* Drawer overlay */
.drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s var(--ease-out),
                transform 0.3s var(--ease-out);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.drawer-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* Drawer container - Apple Materials */
.drawer {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(88vw, 480px);
    transform: translateX(-100%);
    transition: transform 0.35s ease;
    z-index: 1000;
    backdrop-filter: blur(22px) saturate(180%);
    -webkit-backdrop-filter: blur(22px) saturate(180%);
    background: color-mix(in oklab, Canvas 72%, CanvasText 8%);
    border-right: 1px solid color-mix(in oklab, CanvasText 18%, transparent);
    box-shadow: var(--shadow-strong);
    overflow: hidden;
    overscroll-behavior: contain;
    display: flex;
    flex-direction: column;
}

.drawer.open {
    transform: translateX(0);
}

/* Prevent body scroll when drawer is open */
body.drawer-open {
    overflow: hidden;
    overscroll-behavior: none;
}

/* Container query fallback using viewport queries */

/* Enhanced breakpoints for different screen sizes */
/* iPad Air portrait (768px) and larger keep dual-pane for complete experience */
@media (min-width: 768px) {
    .app-container {
        grid-template-columns: minmax(280px, 380px) 1fr;
        gap: clamp(12px, 1.5vw, 24px);
    }

    /* Ensure sidebar toggle is hidden on larger screens */
    .sidebar-toggle {
        display: none;
    }

    /* Hide quick dock on larger screens */
    .quick-dock {
        display: none !important;
    }
}

/* Only narrow mobile screens (< 768px) use drawer mode */
@media (max-width: 767px) {
    .app-container {
        grid-template-columns: 1fr;
        gap: 0;
        padding: var(--spacing-3);
    }

    /* Only hide main layout left panel, not drawer content */
    .app-container > .left-panel {
        display: none;
    }

    /* Ensure drawer left panel stays visible */
    .drawer .left-panel {
        display: flex;
    }

    .sidebar-toggle {
        display: flex;
    }

    .right-panel {
        min-height: calc(100vh - 2 * var(--spacing-3));
    }
}

/* Tablet optimizations for iPad Air portrait */
@media (min-width: 768px) and (max-width: 1024px) {
    .app-container {
        grid-template-columns: minmax(300px, 350px) 1fr;
        gap: clamp(16px, 2vw, 20px);
        padding: var(--spacing-4);
    }

    /* Optimize history grid for tablet */
    .history-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: var(--spacing-3);
    }
}

@media (min-width: 1025px) and (max-width: 1366px) {
    .app-container {
        gap: clamp(16px, 1.5vw, 24px);
        grid-template-columns: minmax(300px, 380px) 1fr;
    }
}

@media (min-width: 1367px) {
    .app-container {
        gap: clamp(20px, 2vw, 32px);
        grid-template-columns: minmax(320px, 420px) 1fr;
    }

    /* Enhanced history density for large screens */
    .history-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: clamp(16px, 1.2vw, 20px);
    }

    .history-grid .generation-item {
        max-height: 280px;
    }

    .history-grid .generation-item img {
        max-height: 220px;
    }
}

@media (min-width: 1600px) {
    /* Ultra-wide screens: even better density */
    .history-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: clamp(18px, 1.3vw, 24px);
    }

    .history-grid .generation-item {
        max-height: 320px;
    }

    .history-grid .generation-item img {
        max-height: 260px;
    }
}

@media (max-width: 768px) {
    .controls-section,
    .tab-content {
        padding: var(--spacing-4);
    }

    .history-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--spacing-3);
    }

    .drawer {
        width: min(92vw, 400px);
    }
}

@media (max-width: 600px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }

    .results-grid, .history-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: var(--spacing-2);
    }

    .history-controls {
        flex-direction: column;
        gap: var(--spacing-2);
    }

    .history-btn {
        width: 100%;
        text-align: center;
    }

    .drawer {
        width: min(95vw, 350px);
    }
}

/* Touch-friendly enhancements */
@media (hover: none) and (pointer: coarse) {
    /* 放大触控目标 */
    button, .btn, .action-btn {
        min-height: 44px;
        min-width: 44px;
        padding: 12px 16px;
    }

    /* 历史项目操作按钮始终可见 */
    .item-actions {
        opacity: 1;
    }

    /* 确保悬停操作按钮在触控设备上可见 */
    .use-as-input-btn {
        opacity: 1;
    }

    /* Enhanced touch targets for drawer */
    .sidebar-toggle {
        width: 52px;
        height: 52px;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(118, 75, 162, 0.5);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(118, 75, 162, 0.7);
}

/* Custom size fields visibility */
.custom-size {
    transition: opacity 0.3s var(--ease-out),
                transform 0.3s var(--ease-out);
}

/* Image Modal/Lightbox */
.image-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.95);
    animation: fadeIn 0.3s;
}

.image-modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

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

.modal-content {
    max-width: 90%;
    max-height: 80vh;
    object-fit: contain;
    animation: zoomIn 0.3s;
    transition: transform 0.3s ease;
    cursor: grab;
    transform-origin: center;
    user-select: none;
}

@keyframes zoomIn {
    from { transform: scale(0.8); }
    to { transform: scale(1); }
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: var(--text-secondary);
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
    z-index: 1001;
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover,
.modal-close:focus {
    color: var(--brand-primary);
}

.modal-caption {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: white;
    background: rgba(0, 0, 0, 0.7);
    padding: 15px 25px;
    border-radius: 8px;
    max-width: 80%;
}

.modal-caption #modalCaption {
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.modal-use-btn {
    background: linear-gradient(135deg, var(--brand-secondary) 0%, var(--brand-primary) 100%);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.3s var(--ease-out),
                transform 0.3s var(--ease-out);
}

.modal-use-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(118, 75, 162, 0.5);
}

/* Make history images clickable */
.history-grid .generation-item {
    cursor: pointer;
}

.history-grid .generation-item:hover {
    transform: scale(1.05);
}
/* ============================= */
/* UI Polish: Enhanced Theming, Progress, and Interactions */
/* ============================= */

/* Theme tokens for new styles */
:root {
  --brand-primary: #007AFF;
  --brand-secondary: #5AC8FA;
  --brand-accent: #64D2FF;
  --brand-dark: #1a1a2e;
  --brand-muted: #2d2d2d;
  --success: #22c55e;
  --danger: #ef4444;
  --info: #0ea5e9;
  --warning: #f59e0b;
  --surface: #ffffff;
  --shadow-soft: 0 8px 20px rgba(0,0,0,0.08);
  --shadow-strong: 0 12px 30px rgba(0,0,0,0.15);
}

/* Right panel sticky header and subtle translucency */
.right-panel .history-header {
  position: sticky;
  top: 0;
  z-index: 15;
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  background: rgba(24,24,28,0.6);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

/* Cards: subtle border and elevation */
.card {
  border: 1px solid rgba(124, 58, 237, 0.10);
  box-shadow: var(--shadow-soft);
}

/* Inputs: improved focus ring and hover */
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.05s ease;
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
  border-color: var(--brand-accent);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.12);
}

/* Tabs: pill-like top borders and better active state */
.history-tabs {
  padding: 4px 6px 0;
}

.tab-btn {
  border-radius: 10px 10px 0 0;
  margin: 0 6px;
  border: 1px solid transparent;
}

.tab-btn.active {
  border-color: rgba(255,255,255,0.12);
  border-bottom-color: transparent;
  box-shadow: inset 0 -2px 0 0 var(--brand-accent);
}

/* Generate button: enhanced hover/active states */
.generate-btn {
  background: linear-gradient(135deg, var(--brand-secondary) 0%, var(--brand-primary) 100%);
  box-shadow: 0 10px 24px rgba(124,58,237,0.25);
}

.generate-btn:hover {
  transform: translateY(-2px) scale(1.01);
  box-shadow: 0 14px 30px rgba(124,58,237,0.35);
}

.generate-btn:active {
  transform: translateY(0) scale(0.995);
}

/* Current results tiles: subtle border and soft hover */
.results-grid .generation-item {
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: var(--shadow-soft);
}

.results-grid .generation-item:hover {
  box-shadow: var(--shadow-strong);
}

/* History thumbnails: refined hover */
.history-grid .generation-item {
  border: 1px solid rgba(255,255,255,0.08);
}

.history-grid .generation-item img {
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.history-grid .generation-item:hover img {
  transform: scale(1.03);
  opacity: 0.95;
}

/* Use-as-input button improved visibility */
.use-as-input-btn {
  background: linear-gradient(135deg, var(--brand-secondary), var(--brand-primary));
  box-shadow: 0 8px 18px rgba(124,58,237,0.28);
}

/* Status messages: subtle icons via border colors */
.status-message.info {
  border-left-color: var(--info);
}

.status-message.success {
  border-left-color: var(--success);
}

.status-message.error {
  border-left-color: var(--danger);
}

.status-message.warning {
  border-left-color: var(--warning);
}

/* Global upload progress container (top-level) */
.upload-progress-container {
  margin-top: 12px;
  background: rgba(55, 48, 163, 0.8); /* Deeper purple background for better contrast */
  border: 1px solid rgba(124,58,237,0.6);
  border-radius: 10px;
  padding: 10px 12px;
  box-shadow: var(--shadow-soft);
  color: white; /* Ensure text is white for readability */
}

.upload-progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255,255,255,0.2);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.upload-progress-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--brand-secondary), var(--brand-primary));
  border-radius: 6px;
  transition: width 0.25s ease;
}

.upload-progress-fill.complete {
  background: linear-gradient(90deg, var(--success), var(--success));
}

.upload-progress-text {
  margin-top: 8px;
  font-size: 0.85rem;
  color: white; /* Set to white explicitly */
  font-weight: 600;
}

/* Individual image upload status (mini) */
.image-upload-status {
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  background: rgba(255,255,255,0.95);
  padding: 4px 6px;
  font-size: 10px;
  text-align: center;
  transition: opacity 0.3s ease;
  z-index: 3;
}

.upload-progress-mini {
  height: 3px;
  background: var(--surface-tertiary);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 3px;
}

.upload-progress-mini-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-hover));
  border-radius: 2px;
  transition: width 0.25s ease;
  width: 0;
}

.image-preview-item.uploaded .upload-progress-mini-bar {
  background: linear-gradient(90deg, var(--success), var(--success));
}

.image-preview-item.upload-failed .upload-progress-mini-bar {
  background: linear-gradient(90deg, var(--danger), var(--danger));
}

.upload-status-text {
  display: inline-block;
  color: var(--text-secondary);
  font-weight: 600;
}

.image-preview-item.uploaded .upload-status-text {
  color: var(--success);
}

.image-preview-item.upload-failed .upload-status-text {
  color: var(--danger);
}

/* Make remove buttons always accessible without overlapping status */
.image-preview-item .remove-btn {
  z-index: 4;
}

/* Modal: crisp border shadow and enhanced zoom */
.modal-content {
  border-radius: 12px;
  box-shadow: var(--shadow-strong);
}

/* Keyboard navigation styles */
.keyboard-nav *:focus {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.keyboard-nav *:focus:not(:focus-visible) {
    outline: none;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--brand-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: 9999;
}

.skip-link:focus {
    top: 6px;
}

/* Scroll area polish */
.right-panel {
  scrollbar-gutter: stable;
}

/* Minor polish on help links */
.help-text a {
  color: var(--brand-accent);
}

/* 中文字体优化 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* 中文文本优化 */
label, .form-group label {
    font-weight: 500;
    letter-spacing: 0.01em;
}

/* 按钮文字优化 */
/* Touch-friendly buttons with 44pt minimum */
button, .btn {
    min-height: 44px;
    min-width: 44px;
    padding: 10px 14px;
    border-radius: 12px;
    border: none;
    font-weight: 500;
    font-size: max(16px, 1rem);
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: transform 0.18s ease, filter 0.18s ease, box-shadow 0.18s ease;
    background: var(--brand);
    color: white;
    line-height: 1.2;
}

/* iPad hover effects - 吸附感 */
@media (hover: hover) and (pointer: fine) {
    button:hover, .btn:hover {
        transform: translateY(-1px) scale(1.02);
        filter: brightness(1.05);
        box-shadow: 0 8px 24px color-mix(in oklab, CanvasText 14%, transparent);
    }

    .card:hover {
        transform: translateY(-1px) scale(1.005);
        box-shadow: 0 8px 24px color-mix(in oklab, CanvasText 14%, transparent);
        transition: transform 0.18s ease, box-shadow 0.18s ease;
    }

    .tab-btn:hover {
        transform: translateY(-1px) scale(1.02);
        box-shadow: 0 6px 18px color-mix(in oklab, CanvasText 12%, transparent);
    }

    .btn-icon:hover, .btn-test:hover {
        transform: translateY(-1px) scale(1.05);
        box-shadow: 0 4px 12px color-mix(in oklab, var(--brand-primary) 20%, transparent);
    }

    .settings-toggle-btn:hover {
        transform: scale(1.1);
        box-shadow: 0 4px 12px color-mix(in oklab, var(--brand-primary) 15%, transparent);
    }

    .clear-all-btn:hover {
        transform: translateY(-1px) scale(1.02);
        box-shadow: 0 4px 12px color-mix(in oklab, var(--danger) 25%, transparent);
    }

    .result-item:hover, .history-item:hover {
        transform: translateY(-2px) scale(1.02);
        box-shadow: 0 8px 24px color-mix(in oklab, CanvasText 16%, transparent);
        transition: transform 0.18s ease, box-shadow 0.18s ease;
    }

    .modal-close:hover {
        transform: scale(1.1);
        text-shadow: 0 0 10px currentColor;
    }

    input:hover, textarea:hover, select:hover {
        transform: translateY(-1px);
        box-shadow: 0 4px 12px color-mix(in oklab, CanvasText 8%, transparent);
        transition: transform 0.18s ease, box-shadow 0.18s ease;
    }
}

button:active, .btn:active {
    transform: translateY(0);
    filter: brightness(0.95);
}

/* 状态消息中文优化 */
.status-message {
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* 提示文本优化 */
.help-text, small {
    font-weight: 400;
    opacity: 0.8;
}

/* 日志文本优化 */
.log-entry {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Mono', 'PingFang SC', monospace;
    font-size: 0.85rem;
    line-height: 1.4;
}

/* 标签页文字优化 */
.tab-btn {
    font-weight: 500;
    letter-spacing: 0.01em;
}

/* 表单输入框中文优化 */
input, textarea, select {
    font-family: inherit;
    line-height: 1.5;
}

/* 模态框中文优化 */
.modal-caption {
    font-weight: 400;
    line-height: 1.6;
    letter-spacing: 0.01em;
}

/* API Key Input Group */
.api-key-input-group {
    display: flex;
    gap: var(--spacing-2);
    align-items: stretch;
}

.api-key-input-group input {
    flex: 1;
    margin: 0;
}

.btn-icon, .btn-test {
    min-height: 44px;
    min-width: 44px;
    padding: var(--spacing-3) var(--spacing-3);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    background: var(--surface-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    white-space: nowrap;
}

.btn-icon {
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-test {
    font-weight: 600;
}

.btn-icon:hover, .btn-test:hover {
    background: var(--surface-tertiary);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

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

.btn-test:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.api-key-status {
    margin-top: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    font-size: 13px;
    font-weight: 500;
    display: none;
}

.api-key-status.success {
    background: var(--success-bg);
    color: var(--success);
    border-color: var(--success);
    display: block;
}

.api-key-status.error {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger);
    display: block;
}

.api-key-status.testing {
    background: var(--info-bg);
    color: var(--info);
    border-color: var(--info);
    display: block;
}

/* Upload limits styling */
.upload-limits {
    color: var(--text-tertiary);
    font-size: 12px;
    margin-top: var(--spacing-1);
    margin-bottom: var(--spacing-2);
    font-weight: 400;
}

/* Item actions for history grid */
.item-actions {
    position: absolute;
    top: var(--spacing-2);
    right: var(--spacing-2);
    display: flex;
    gap: var(--spacing-1);
    opacity: 0;
    transition: opacity 0.2s ease;
    background: rgba(0, 0, 0, 0.7);
    border-radius: var(--radius-md);
    padding: var(--spacing-1);
    backdrop-filter: blur(8px);
}

.generation-item:hover .item-actions {
    opacity: 1;
}

.action-btn {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: var(--spacing-3);
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.18s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.4);
}

.favorite-btn.favorited {
    background: var(--warning);
    color: white;
    border-color: var(--warning);
}

.use-input-btn {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
}

.copy-url-btn:hover {
    background: var(--info);
    border-color: var(--info);
}

.copy-prompt-btn:hover {
    background: var(--success);
    border-color: var(--success);
}

/* High contrast mode support */
@media (prefers-contrast: more) {
    :root {
        /* Enhanced borders for high contrast */
        --border-light: var(--border-strong);
        --border-medium: color-mix(in oklab, CanvasText 40%, transparent);
    }

    .card {
        border-color: var(--border-strong);
        box-shadow: var(--shadow-md);
    }

    .btn, button {
        outline: 2px solid color-mix(in oklab, CanvasText 30%, transparent);
        outline-offset: 1px;
    }

    .status-message {
        border-width: 2px;
        box-shadow: var(--shadow-sm);
    }

    .tab-btn.active {
        box-shadow: var(--shadow-md);
    }

    .generate-btn {
        box-shadow: var(--shadow-lg);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    /* Keep essential animations but reduce them */
    .spinner {
        animation: none !important;
    }

    .drawer {
        transition: none !important;
    }

    .drawer-overlay {
        transition: none !important;
    }

    .toast {
        animation: none !important;
        transition: none !important;
    }

    .modal-content {
        animation: none !important;
    }

    .banner {
        transition: none !important;
    }

    /* Disable transform animations that could cause motion sickness */
    .image-preview-item:hover {
        transform: none !important;
    }

    .btn:hover {
        transform: none !important;
    }
}

/* iPad pointer hover enhancements */
@media (hover: hover) and (pointer: fine) {
    .card:hover {
        transform: translateY(-1px);
        box-shadow: var(--shadow-md);
        transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .generate-btn:hover {
        transform: translateY(-1px);
        box-shadow: var(--shadow-lg);
    }

    .btn:hover,
    .history-btn:hover {
        transform: translateY(-1px);
        box-shadow: var(--shadow-sm);
    }

    .result-item:hover,
    .history-item:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    /* Magnetic pointer effect for key controls */
    .tab-btn:hover {
        transform: translateY(-1px);
        box-shadow: var(--shadow-sm);
    }
}

/* Enhanced focus-visible styles for accessibility (WCAG AA) */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
.action-btn:focus-visible,
.remove-btn:focus-visible {
    outline: 3px solid var(--brand-primary);
    outline-offset: 2px;
    border-radius: 6px;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.8);
}

/* Tab navigation improvements */
.tab-btn:focus-visible {
    outline: 2px solid var(--brand-primary);
    outline-offset: -2px;
}

/* Quick Dock for narrow screens */
.quick-dock {
    display: none;
    position: sticky;
    bottom: 0;
    background: color-mix(in oklab, var(--surface) 92%, transparent);
    backdrop-filter: blur(16px) saturate(1.2);
    -webkit-backdrop-filter: blur(16px) saturate(1.2);
    border-top: 1px solid var(--border-light);
    padding: var(--spacing-3) var(--spacing-4);
    gap: var(--spacing-3);
    align-items: stretch;
    z-index: 20;
}

.quick-dock input {
    flex: 1;
    min-height: 50px;
    padding: var(--spacing-3) var(--spacing-4);
    border: 2px solid var(--border-medium);
    border-radius: var(--radius-lg);
    background: var(--surface);
    color: var(--text-primary);
    font-size: 16px;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
}

.quick-dock input:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px var(--brand-bg);
}

.dock-generate-btn {
    min-height: 44px;
    min-width: 80px;
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--brand-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    white-space: nowrap;
}

.dock-generate-btn:hover {
    background: var(--brand-hover);
    transform: translateY(-1px);
}

/* Show quick dock only on very narrow screens */
@media (max-width: 767px) {
    .quick-dock {
        display: flex;
    }

    /* Hide dock when drawer is open */
    .drawer.open ~ .app-container .quick-dock {
        display: none;
    }
}

/* ============================= */
/* Apple HIG Enhanced Progress & Notifications */
/* ============================= */

/* Enhanced Progress Ring for Generate Button */
.generate-btn {
    position: relative;
    overflow: hidden;
}

.generate-btn[aria-busy="true"] {
    pointer-events: none;
    opacity: 0.8;
}

.generate-btn .progress-ring {
    position: absolute;
    inset: -4px;
    border-radius: 999px;
    border: 2px solid color-mix(in oklab, var(--brand-primary) 60%, transparent);
    border-top-color: transparent;
    animation: spin 0.8s linear infinite;
}

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

/* Skeleton Loading States */
.skeleton {
    background: linear-gradient(90deg, transparent, color-mix(in oklab, CanvasText 8%, transparent), transparent);
    background-size: 200% 100%;
    animation: shimmer 1.4s infinite;
}

@keyframes shimmer {
    0% { background-position: -100% 0; }
    100% { background-position: 200% 0; }
}

.preview-skeleton {
    width: 100%;
    height: 200px;
    border-radius: var(--radius-lg);
    background: var(--surface-secondary);
}

/* Non-intrusive Banner System */
.banner {
    position: fixed;
    top: max(var(--spacing-4), env(safe-area-inset-top));
    left: 50%;
    transform: translateX(-50%);
    z-index: 1100;
    backdrop-filter: blur(22px) saturate(180%);
    -webkit-backdrop-filter: blur(22px) saturate(180%);
    background: color-mix(in oklab, Canvas 72%, CanvasText 8%);
    border: 1px solid color-mix(in oklab, CanvasText 18%, transparent);
    border-radius: var(--radius-xl);
    padding: var(--spacing-3) var(--spacing-5);
    box-shadow: var(--shadow-lg);
    max-width: 90vw;
    transition: opacity 0.3s var(--ease-out),
                transform 0.3s var(--ease-out);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-20px);
}

.banner.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.banner.success {
    border-color: var(--success);
    background: color-mix(in oklab, var(--success) 15%, Canvas 85%);
}

.banner.error {
    border-color: var(--danger);
    background: color-mix(in oklab, var(--danger) 15%, Canvas 85%);
}

.banner.warning {
    border-color: var(--warning);
    background: color-mix(in oklab, var(--warning) 15%, Canvas 85%);
}

/* Toast System - Bottom Right */
.toasts {
    position: fixed;
    bottom: max(var(--spacing-6), env(safe-area-inset-bottom));
    right: max(var(--spacing-6), env(safe-area-inset-right));
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    pointer-events: none;
}

.toast {
    backdrop-filter: blur(22px) saturate(180%);
    -webkit-backdrop-filter: blur(22px) saturate(180%);
    background: color-mix(in oklab, Canvas 82%, CanvasText 18%);
    border: 1px solid color-mix(in oklab, CanvasText 18%, transparent);
    border-radius: var(--radius-xl);
    padding: var(--spacing-4) var(--spacing-5);
    box-shadow: var(--shadow-lg);
    max-width: 350px;
    pointer-events: auto;
    transition: opacity 0.3s var(--ease-out),
                transform 0.3s var(--ease-out);
    opacity: 0;
    transform: translateX(100%);
    color: var(--text-primary);
    font-size: var(--size-caption);
    font-weight: 500;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.success {
    border-color: var(--success);
    background: color-mix(in oklab, var(--success) 12%, Canvas 88%);
}

.toast.error {
    border-color: var(--danger);
    background: color-mix(in oklab, var(--danger) 12%, Canvas 88%);
}

.toast.warning {
    border-color: var(--warning);
    background: color-mix(in oklab, var(--warning) 12%, Canvas 88%);
}

.toast.info {
    border-color: var(--info);
    background: color-mix(in oklab, var(--info) 12%, Canvas 88%);
}

.toast-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-2);
    font-weight: 600;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-1);
    border-radius: var(--radius-sm);
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
    font-size: 16px;
    line-height: 1;
}

.toast-close:hover {
    background: color-mix(in oklab, CanvasText 10%, transparent);
    color: var(--text-primary);
}

/* Enhanced Progress Logs */
.progress-logs {
    margin-top: var(--spacing-4);
    background: var(--surface-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    max-height: 120px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-gutter: stable;
    display: none;
    font-family: ui-monospace, 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-size: 12px;
}

.progress-logs.active {
    display: block;
}

.progress-logs .log-entry {
    padding: var(--spacing-2) var(--spacing-3);
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
    line-height: 1.4;
}

.progress-logs .log-entry:last-child {
    border-bottom: none;
}

.progress-logs .log-entry.success {
    color: var(--success);
}

.progress-logs .log-entry.error {
    color: var(--danger);
}

.progress-logs .log-entry.warning {
    color: var(--warning);
}

/* Collapsed progress details */
.progress-details-toggle {
    background: none;
    border: none;
    color: var(--brand-primary);
    cursor: pointer;
    font-size: var(--size-caption);
    padding: var(--spacing-2) 0;
    text-decoration: underline;
    transition: color 0.2s ease;
}

.progress-details-toggle:hover {
    color: var(--brand-hover);
}

/* Micro progress indicators for history */
.generation-meta::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
    display: inline-block;
    margin-right: var(--spacing-2);
}

.generation-meta.processing::before {
    background: var(--warning);
    animation: pulse 1.5s ease-in-out infinite;
}

.generation-meta.failed::before {
    background: var(--danger);
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* Toast action buttons */
.toast-actions {
    margin-top: var(--spacing-3);
    display: flex;
    gap: var(--spacing-2);
}

.toast-action {
    background: var(--brand-primary);
    color: white;
    border: none;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    font-size: var(--size-caption);
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s var(--ease-interactive),
                border-color 0.2s var(--ease-interactive),
                color 0.2s var(--ease-interactive),
                transform 0.18s var(--ease-out);
}

.toast-action:hover {
    background: var(--brand-hover);
    transform: translateY(-1px);
}

/* Enhanced button states */
.generate-btn:not([aria-busy="true"]):hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px color-mix(in oklab, var(--brand-primary) 35%, transparent);
}

.generate-btn:not([aria-busy="true"]):active {
    transform: translateY(0) scale(0.98);
}

/* Form enhancements */
.form-group input:hover:not(:focus),
.form-group textarea:hover:not(:focus),
.form-group select:hover:not(:focus) {
    border-color: var(--border-medium);
    background: var(--surface-secondary);
}

/* Card hover enhancements */
.card:hover {
    border-color: color-mix(in oklab, var(--brand-primary) 25%, transparent);
    box-shadow: var(--shadow-md);
}

/* History item enhancements */
.generation-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* API Key status enhancements */
.api-key-status.testing::before {
    content: "⏳ ";
}

.api-key-status.success::before {
    content: "✓ ";
}

.api-key-status.error::before {
    content: "⚠ ";
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .progress-ring,
    .skeleton,
    .generation-meta.processing::before {
        animation: none;
    }

    .banner,
    .toast {
        transition: opacity 0.1s ease;
    }

    .banner.show,
    .toast.show {
        transform: translateX(-50%) translateY(0);
    }

    .generate-btn:hover,
    .generation-item:hover,
    .card:hover {
        transform: none;
    }
}

/* API Key Onboarding Highlight Animation */
@keyframes pulse-highlight {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(0, 122, 255, 0);
        border-color: var(--border-light);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(0, 122, 255, 0.15),
                    0 0 20px rgba(0, 122, 255, 0.1);
        border-color: var(--brand-primary);
    }
}

/* Settings Floating Button */
.settings-floating-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--surface-primary);
    border: 1px solid var(--border-light);
    font-size: 24px;
    cursor: pointer;
    z-index: 999;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.settings-floating-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Settings Modal */
.settings-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.settings-modal.show {
    display: flex;
}

.settings-modal-content {
    background: var(--surface-primary);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.settings-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4);
    border-bottom: 1px solid var(--border-light);
}

.settings-modal-header h2 {
    margin: 0;
    font-size: var(--font-lg);
}

.modal-close-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: transparent;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.modal-close-btn:hover {
    background: var(--surface-secondary);
    color: var(--text-primary);
}

.settings-modal-body {
    padding: var(--spacing-4);
}

.settings-modal-body .form-group {
    margin-bottom: var(--spacing-4);
}

@media (max-width: 768px) {
    .settings-floating-btn {
        display: none;
    }
}