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

:root {
    /* 主色调 */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-warm: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    
    /* 中性色 */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --border-color: #e5e7eb;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    /* 状态色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #3b82f6;
}

/* ==================== 深色模式 ==================== */
[data-theme="dark"] {
    /* 主色调 - 深色模式下稍微调亮 */
    --primary-color: #818cf8;
    --primary-dark: #6366f1;
    --primary-light: #a5b4fc;
    --secondary-color: #a78bfa;
    --accent-color: #f472b6;
    
    /* 中性色 - 深色模式 */
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --border-color: #374151;
    --bg-primary: #1f2937;
    --bg-secondary: #111827;
    --bg-tertiary: #0f172a;
    
    /* 阴影 - 深色模式下更柔和 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* 字体 */
    --font-primary: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Noto Serif SC', serif;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background: var(--bg-secondary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==================== 背景装饰 ==================== */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float 20s infinite ease-in-out;
}

.circle-1 {
    width: 600px;
    height: 600px;
    background: var(--gradient-primary);
    top: -300px;
    right: -300px;
    animation-delay: 0s;
}

.circle-2 {
    width: 400px;
    height: 400px;
    background: var(--gradient-accent);
    bottom: -200px;
    left: -200px;
    animation-delay: 7s;
}

.circle-3 {
    width: 500px;
    height: 500px;
    background: var(--gradient-warm);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* 主题切换按钮 - 浮动按钮 */
#themeToggle {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--gradient-primary);
    border: none;
    cursor: pointer;
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    box-shadow: var(--shadow-xl);
    z-index: 999;
    transition: all 0.3s ease;
}

#themeToggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-2xl);
}

.theme-icon {
    width: 24px;
    height: 24px;
    color: white;
    position: absolute;
    transition: opacity 0.3s, transform 0.3s;
}

.theme-icon.sun-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.theme-icon.moon-icon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .theme-icon.sun-icon {
    opacity: 0;
    transform: rotate(-90deg);
}

[data-theme="dark"] .theme-icon.moon-icon {
    opacity: 1;
    transform: rotate(0deg);
}

/* ==================== 主要内容区 ==================== */
.main-content {
    position: relative;
    z-index: 1;
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - 200px);
}

/* ==================== 英雄区域 ==================== */
.hero-section {
    margin-bottom: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
}

.hero-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.hero-logo {
    width: 120px;
    height: 120px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.15));
}

.hero-logo:hover {
    transform: scale(1.05) rotate(5deg);
}

.hero-text {
    flex: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    text-align: left;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: left;
}

/* ==================== 内容网格 ==================== */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

/* ==================== 卡片样式 ==================== */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.title-icon {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

.card-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ==================== 表单样式 ==================== */
.certificate-form {
    padding: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.label-required {
    color: var(--error-color);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.3s;
    background: var(--bg-secondary);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.input-hint {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.textarea-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xs);
}

.char-count {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* ==================== 模板选择 ==================== */
.template-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.template-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.template-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.template-grid-expanded {
    grid-template-columns: repeat(3, 1fr);
}

.template-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
}

.template-btn:hover {
    background: var(--bg-primary);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.template-emoji {
    font-size: 2rem;
}

.template-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
    background: var(--bg-primary);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-download {
    background: var(--gradient-accent);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.form-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

/* ==================== 预览区域 ==================== */
.preview-card {
    position: sticky;
    top: 20px;
}

.preview-container {
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.preview-placeholder {
    text-align: center;
    padding: var(--spacing-2xl);
}

.placeholder-icon {
    width: 120px;
    height: 120px;
    color: var(--text-tertiary);
    margin: 0 auto var(--spacing-xl);
    opacity: 0.5;
}

.placeholder-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.placeholder-subtext {
    font-size: 1.125rem;
    color: var(--text-tertiary);
}

.preview-image-container {
    width: 100%;
    text-align: center;
}

.certificate-image {
    max-width: 100%;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.image-actions {
    margin-top: var(--spacing-lg);
}

/* 加载动画 */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--spacing-md);
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    font-weight: 600;
    color: var(--text-secondary);
}

/* 预览提示 */
.preview-tips {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.tip-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.tip-icon {
    width: 18px;
    height: 18px;
    color: var(--success-color);
}

/* ==================== 使用指南 ==================== */
.guide-card {
    margin-top: var(--spacing-xl);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.guide-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.guide-list {
    padding-left: var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 2;
}

.guide-list li {
    margin-bottom: var(--spacing-xs);
}

/* ==================== 统计卡片 ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-2px);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.stat-icon-primary {
    background: var(--gradient-primary);
}

.stat-icon-success {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s;
}

.footer-link:hover {
    color: var(--primary-color);
}

/* ==================== Toast 通知 ==================== */
.toast-container {
    position: fixed;
    top: 100px;
    right: var(--spacing-xl);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.toast {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 300px;
    max-width: 400px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: 2px;
}

.toast-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.toast-success .toast-icon {
    color: var(--success-color);
}

.toast-error .toast-icon {
    color: var(--error-color);
}

.toast-warning .toast-icon {
    color: var(--warning-color);
}

.toast-info .toast-icon {
    color: var(--info-color);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .preview-card {
        position: static;
    }
}

@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-logo {
        width: 80px;
        height: 80px;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-title {
        font-size: 2rem;
        text-align: center;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        text-align: center;
    }
    
    .template-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-actions {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }
    
    .toast {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .template-grid {
        grid-template-columns: 1fr;
    }
    
    .preview-tips {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* ==================== 新增功能样式 ==================== */

/* 个性化选项 */
.advanced-options {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-md);
    align-items: end;
}

.form-input-sm {
    padding: var(--spacing-sm) var(--spacing-md);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: var(--spacing-sm) 0;
}

.checkbox-label input[type="checkbox"] {
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

/* 快捷操作按钮 */
.quick-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.btn-quick {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-quick svg {
    width: 16px;
    height: 16px;
}

.btn-quick:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.btn-quick-clear:hover {
    border-color: var(--error-color);
    color: var(--error-color);
}

.btn-quick-random:hover {
    border-color: var(--info-color);
    color: var(--info-color);
}

/* 分享和全屏按钮 */
.btn-share,
.btn-fullscreen {
    background: var(--bg-primary);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-share:hover,
.btn-fullscreen:hover {
    background: var(--primary-color);
    color: white;
}

.image-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.image-actions .btn {
    flex: 1;
    min-width: 120px;
}

/* 历史记录 */
.history-section {
    margin-top: var(--spacing-xl);
}

.history-card .card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 0.875rem;
    font-family: inherit;
    transition: color 0.3s;
    padding: var(--spacing-xs) var(--spacing-md);
}

.btn-text:hover {
    color: var(--error-color);
}

.history-list {
    padding: var(--spacing-md);
    max-height: 400px;
    overflow-y: auto;
}

.history-empty {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    color: var(--text-tertiary);
}

.empty-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    opacity: 0.3;
}

.history-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    cursor: pointer;
    transition: all 0.3s;
}

.history-item:hover {
    border-color: var(--primary-color);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.history-thumbnail {
    width: 80px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.history-info {
    flex: 1;
}

.history-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
}

.history-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.history-delete {
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: color 0.3s;
}

.history-delete:hover {
    color: var(--error-color);
}

.history-delete svg {
    width: 18px;
    height: 18px;
}

/* 全屏模态框 */
.fullscreen-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
}

.fullscreen-modal.active {
    display: block;
}

.fullscreen-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
}

.fullscreen-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
}

.fullscreen-content img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2xl);
    animation: zoomIn 0.3s ease-out;
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.fullscreen-close {
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.fullscreen-close:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: rotate(90deg);
}

.fullscreen-close svg {
    width: 24px;
    height: 24px;
}

/* 分享模态框 */
.share-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9998;
}

.share-modal.active {
    display: block;
}

.share-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.share-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-2xl);
    min-width: 400px;
    max-width: 90%;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translate(-50%, -40%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.share-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.share-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.share-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.share-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
    color: var(--text-primary);
}

.share-option:hover {
    border-color: var(--primary-color);
    background: var(--bg-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.share-option svg {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.share-option span {
    font-size: 0.875rem;
    font-weight: 500;
}

.share-close {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.share-close:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* 响应式优化 */
@media (max-width: 768px) {
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .template-grid-expanded {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .image-actions {
        flex-direction: column;
    }
    
    .image-actions .btn {
        width: 100%;
    }
    
    .share-content {
        min-width: auto;
        width: 90%;
    }
    
    .share-options {
        grid-template-columns: 1fr;
    }
    
    .history-list {
        max-height: 300px;
    }
}

@media (max-width: 480px) {
    .template-grid-expanded {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        flex-direction: column;
    }
    
    .fullscreen-content {
        padding: var(--spacing-lg);
    }
}