/* ========================================
   设计灵感来源：
   1. Yayoi Kusama（草间弥生）- 波点元素、鲜艳色彩、童趣感
   2. Charles & Ray Eames - 模块化设计、功能美学、温暖质感
   
   转译说明：
   - 草间弥生：提取其标志性的波点图案作为装饰元素，
     运用高饱和度的对比色彩（黄、橙、粉、蓝绿），
     创造充满活力和想象力的视觉体验
   - Eames：采用圆润的几何形态、模块化卡片布局、
     温暖的木质纹理感，营造亲切友好的学习氛围
   ======================================== */

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes wiggle {
    0%, 100% { transform: rotate(-3deg); }
    50% { transform: rotate(3deg); }
}

@keyframes sparkle {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.8); }
}

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

@keyframes bounceIn {
    0% { opacity: 0; transform: scale(0.3); }
    50% { transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { opacity: 1; transform: scale(1); }
}

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

@keyframes rotate {
    100% { transform: rotate(360deg); }
}

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

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

:root {
    /* 主色调 - 活泼鲜艳的儿童友好配色 */
    --primary: #FF6B35;        /* 活力橙 */
    --primary-light: #FF8F65;
    --primary-dark: #E55A2B;
    
    --secondary: #4ECDC4;      /* 清新青绿 */
    --secondary-light: #7EDDD6;
    --secondary-dark: #3DBDB5;
    
    --accent-yellow: #FFE66D;  /* 阳光黄 */
    --accent-pink: #FF6B9D;    /* 甜蜜粉 */
    --accent-purple: #A855F7;  /* 梦幻紫 */
    --accent-blue: #60A5FA;    /* 天空蓝 */
    --accent-green: #34D399;   /* 草地绿 */
    
    /* 状态色 */
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #3B82F6;
    
    /* 学习状态色 */
    --unknown: #FF6B6B;
    --known: #FFD93D;
    --mastered: #6BCB77;
    
    /* 中性色 */
    --bg-primary: #FFF9F0;     /* 温暖米白 */
    --bg-secondary: #FFFFFF;
    --bg-card: #FFFFFF;
    --text-primary: #2D3748;
    --text-secondary: #4A5568;
    --text-muted: #718096;
    --border-color: #E2E8F0;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(255, 107, 53, 0.08);
    --shadow-md: 0 4px 16px rgba(255, 107, 53, 0.12);
    --shadow-lg: 0 8px 32px rgba(255, 107, 53, 0.16);
    --shadow-xl: 0 16px 48px rgba(255, 107, 53, 0.2);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 9999px;
    
    /* 间距 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    
    /* 字体 */
    --font-display: 'Nunito', 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', 'Nunito', sans-serif;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 装饰性波点背景 - 草间弥生灵感 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 10% 20%, var(--accent-yellow) 2px, transparent 2px),
        radial-gradient(circle at 90% 80%, var(--accent-pink) 3px, transparent 3px),
        radial-gradient(circle at 30% 70%, var(--secondary) 2px, transparent 2px),
        radial-gradient(circle at 70% 30%, var(--primary-light) 2px, transparent 2px),
        radial-gradient(circle at 50% 50%, var(--accent-purple) 1px, transparent 1px);
    background-size: 100px 100px, 150px 150px, 120px 120px, 80px 80px, 60px 60px;
    opacity: 0.3;
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* 页面基础样式 */
.page {
    display: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    min-height: 90vh;
    animation: slideIn 0.4s ease-out;
    position: relative;
}

/* 页面头部 */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-pink) 50%, var(--accent-purple) 100%);
    color: white;
    padding: var(--space-md) var(--space-lg);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: 10%;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
}

.header-content {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 900;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.header h1 i {
    font-size: 2.2rem;
    animation: wiggle 2s ease-in-out infinite;
}

.header-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-top: var(--space-xs);
    font-weight: 500;
}

.top-right-buttons {
    display: flex;
    gap: var(--space-sm);
}

.back-btn, .refresh-btn {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.back-btn:hover, .refresh-btn:hover {
    background: rgba(255, 255, 255, 0.35);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}


/* 主菜单网格 */
.main-menu {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    padding: var(--space-2xl);
}

.menu-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-md);
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.menu-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.menu-card:hover::before {
    transform: scaleX(1);
}

.menu-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.menu-card:nth-child(1) .menu-icon { background: linear-gradient(135deg, #FF6B35, #FF8F65); }
.menu-card:nth-child(2) .menu-icon { background: linear-gradient(135deg, #4ECDC4, #7EDDD6); }
.menu-card:nth-child(3) .menu-icon { background: linear-gradient(135deg, #FFE66D, #FFF0A0); }
.menu-card:nth-child(4) .menu-icon { background: linear-gradient(135deg, #FF6B9D, #FF9DC0); }
.menu-card:nth-child(5) .menu-icon { background: linear-gradient(135deg, #A855F7, #C084FC); }
.menu-card:nth-child(6) .menu-icon { background: linear-gradient(135deg, #60A5FA, #93C5FD); }

.menu-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.menu-card:hover .menu-icon {
    transform: scale(1.1) rotate(5deg);
    animation: pulse 1s ease-in-out infinite;
}

.menu-icon i {
    font-size: 2.2rem;
    color: white;
}

.menu-card h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.menu-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* 内容区域 */
.content {
    padding: var(--space-xl);
    max-height: calc(100vh - 200px);
    overflow-y: auto;
}

.content::-webkit-scrollbar {
    width: 8px;
}

.content::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: var(--radius-full);
}

.content::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: var(--radius-full);
}

/* 卡片组件 */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 3px solid transparent;
    border-image: linear-gradient(90deg, var(--primary), var(--secondary)) 1;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.card h3 i {
    color: var(--primary);
}

/* 按钮系统 */
.btn {
    font-family: var(--font-display);
    font-weight: 700;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning), #D97706);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #DC2626);
    color: white;
}

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

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

/* 默认按钮样式 */
.btn:not([class*="btn-"]) {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

/* 表单元素 */
input[type="text"],
input[type="number"],
input[type="date"],
input[type="file"],
select,
textarea {
    font-family: var(--font-body);
    font-size: 1rem;
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.3s ease;
    width: 100%;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.15);
}

input::placeholder {
    color: var(--text-muted);
}


/* 单词卡片网格 */
.word-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.word-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 3px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    height: 340px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.word-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 107, 53, 0.03) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 0;
}

.word-card:hover::before {
    opacity: 1;
}

.word-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.word-card h4 {
    font-family: var(--font-display);
    position: relative;
    z-index: 1;
    font-size: 1.8rem;
    font-weight: 800;
    margin: var(--space-md) 0;
    color: var(--text-primary);
    cursor: pointer;
    word-break: break-word;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 4px;
}

.word-card h4:hover {
    color: var(--primary);
    transform: scale(1.02);
}

.word-card h4:active {
    transform: scale(0.98);
}

.word-card h4 i {
    transition: all 0.3s ease;
}

.word-card h4:hover i {
    opacity: 1 !important;
    color: var(--primary);
    transform: scale(1.2);
}

.word-info {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin: var(--space-sm) 0;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    word-wrap: break-word;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.word-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    position: relative;
    z-index: 2;
}

.action-btn {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    color: white;
    border: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    padding: 0;
    line-height: 1;
}

.action-btn i {
    font-size: 1.1rem;
    color: white;
    display: block;
}

.action-btn:hover {
    transform: scale(1.15);
    box-shadow: var(--shadow-md);
    opacity: 0.9;
}

.action-btn:active {
    transform: scale(1.05);
}

/* 卡片模式切换按钮 */
.mode-btn {
    font-family: var(--font-display);
    font-weight: 600;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    background: transparent;
    color: var(--text-muted);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.mode-btn:hover {
    color: var(--primary);
    background: rgba(255, 107, 53, 0.1);
}

.mode-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-sm);
}

.status-indicator {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
}

.count-indicator {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    background: var(--bg-primary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
}

.status-unknown { background: linear-gradient(135deg, var(--unknown), #FF8585); }
.status-known { background: linear-gradient(135deg, var(--known), #FFE066); }
.status-mastered { background: linear-gradient(135deg, var(--mastered), #85E095); }

/* 进度条 */
.progress-container {
    width: 100%;
    background: var(--bg-primary);
    border-radius: var(--radius-full);
    margin: var(--space-lg) 0;
    height: 24px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent-yellow));
    background-size: 200% 100%;
    border-radius: var(--radius-full);
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    animation: shimmer 2s linear infinite;
    position: relative;
}

/* 复习卡片 */
.review-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

.review-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 3px solid transparent;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.review-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, var(--primary-light), transparent 30%);
    opacity: 0;
    transition: opacity 0.5s ease;
    animation: rotate 4s linear infinite;
}

.review-card:hover::before {
    opacity: 0.1;
}

.review-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.review-card:nth-child(1) { --card-color: var(--primary); }
.review-card:nth-child(2) { --card-color: var(--secondary); }
.review-card:nth-child(3) { --card-color: var(--accent-purple); }
.review-card:nth-child(4) { --card-color: var(--accent-pink); }
.review-card:nth-child(5) { --card-color: var(--accent-blue); }

.review-card .review-icon {
    width: 70px;
    height: 70px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--card-color), color-mix(in srgb, var(--card-color) 70%, white));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    box-shadow: var(--shadow-md);
}

.review-card .review-icon i {
    font-size: 1.8rem;
    color: white;
}

.review-card h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    border: none;
    padding: 0;
}

.review-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}


/* 答题区域 */
.quiz-area {
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    margin: var(--space-lg) 0;
    border: 2px solid var(--border-color);
}

.quiz-word {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 900;
    color: var(--text-primary);
    margin: var(--space-lg) 0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quiz-word:hover {
    color: var(--primary);
    transform: scale(1.05);
}

.quiz-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin: var(--space-xl) 0;
}

.quiz-option {
    background: var(--bg-card);
    border: 3px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.quiz-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.quiz-option:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.quiz-option:hover::before {
    opacity: 0.1;
}

.quiz-option.correct {
    background: linear-gradient(135deg, #D1FAE5, #A7F3D0);
    border-color: var(--success);
    animation: bounceIn 0.5s ease;
}

.quiz-option.incorrect {
    background: linear-gradient(135deg, #FEE2E2, #FECACA);
    border-color: var(--danger);
    animation: wiggle 0.5s ease;
}

/* 词库详情 */
.lib-detail-container {
    display: flex;
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

.unit-list {
    width: 280px;
    background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    max-height: 500px;
    overflow-y: auto;
    box-shadow: var(--shadow-sm);
}

.unit-list h4 {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--primary);
}

.unit-item {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    border: 2px solid transparent;
}

.unit-item:hover {
    background: var(--bg-card);
    border-color: var(--primary-light);
    transform: translateX(4px);
}

.unit-item.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-color: var(--primary);
}

.word-list-container {
    flex: 1;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
}

.word-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.word-table th {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: var(--space-md);
    text-align: left;
    font-weight: 700;
}

.word-table th:first-child {
    border-radius: var(--radius-md) 0 0 0;
}

.word-table th:last-child {
    border-radius: 0 var(--radius-md) 0 0;
}

.word-table td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease;
}

.word-table tr:hover td {
    background: var(--bg-primary);
}

/* 词库卡片 */
.lib-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.lib-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent-yellow));
}

.lib-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.lib-card h4 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.lib-card p {
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

/* 统计容器 */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-md);
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin-top: var(--space-md);
}

.stat-item {
    text-align: center;
    padding: var(--space-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-4px);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: var(--space-xs);
}


/* 学习设置 */
.learning-settings {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    align-items: center;
    background: var(--bg-primary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
}

.setting-group {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.setting-label {
    font-weight: 700;
    color: var(--text-secondary);
}

.setting-radio {
    display: flex;
    gap: var(--space-md);
}

.setting-radio label {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    cursor: pointer;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    transition: all 0.3s ease;
    border: 2px solid var(--border-color);
}

.setting-radio label:hover {
    border-color: var(--primary);
    background: rgba(255, 107, 53, 0.05);
}

.setting-radio input[type="radio"] {
    width: auto;
    accent-color: var(--primary);
}

/* 发音选择器 */
.pronunciation-selector {
    display: flex;
    gap: var(--space-md);
    align-items: center;
    margin: var(--space-md) 0;
}

.pronunciation-option {
    padding: var(--space-md) var(--space-lg);
    border: 3px solid var(--border-color);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.pronunciation-option:hover {
    border-color: var(--primary);
    background: rgba(255, 107, 53, 0.05);
}

.pronunciation-option.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

/* 拼写区域 */
.spelling-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: var(--space-lg) 0;
}

.spelling-display {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: 4px;
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    padding: var(--space-lg) var(--space-2xl);
    border-radius: var(--radius-lg);
    min-width: 350px;
    text-align: center;
    margin: var(--space-lg) 0;
    border: 3px solid var(--primary-light);
    box-shadow: var(--shadow-md);
    color: var(--text-primary);
}

.letter-tiles {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
    max-width: 550px;
}

.letter-tile {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 800;
    border-radius: var(--radius-md);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
}

.letter-tile:hover {
    transform: translateY(-4px) scale(1.1);
    background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
    box-shadow: var(--shadow-lg);
}

.letter-tile:active {
    transform: scale(0.95);
}

.spelling-result {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    margin: var(--space-md) 0;
    min-height: 36px;
    text-align: center;
}

.spelling-controls {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.spelling-hint {
    background: linear-gradient(135deg, var(--accent-yellow), #FFF0A0);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-top: var(--space-lg);
    text-align: center;
    display: none;
    box-shadow: var(--shadow-md);
    border: 2px solid var(--warning);
}

/* 艾宾浩斯计划 */
.ebbinghaus-student-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

.ebbinghaus-student-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.ebbinghaus-student-card:hover {
    border-color: var(--accent-purple);
    box-shadow: var(--shadow-md);
}

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

.ebbinghaus-student-name {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--text-primary);
}

.plan-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.plan-tab {
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    background: var(--bg-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.plan-tab:hover {
    border-color: var(--accent-purple);
}

.plan-tab.active {
    background: linear-gradient(135deg, var(--accent-purple), #C084FC);
    color: white;
    box-shadow: var(--shadow-md);
}

.plan-calendar {
    margin-top: var(--space-lg);
}

.plan-calendar-toolbar {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-md);
    align-items: center;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--border-color);
}

.plan-calendar-nav {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.plan-calendar-title {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 800;
    color: var(--text-primary);
    justify-content: center;
    position: relative;
}

.plan-calendar-title i {
    color: var(--info);
}

.plan-calendar-title-btn {
    border: none;
    background: transparent;
    color: inherit;
    font: inherit;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    transition: background 0.2s ease, box-shadow 0.2s ease;
}

.plan-calendar-title-btn:hover {
    background: rgba(255, 107, 53, 0.08);
}

.plan-calendar-title-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.18);
}


.plan-calendar-view-toggle {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-xs);
}

.plan-calendar-btn {
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    padding: 6px 12px;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.plan-calendar-btn:hover {
    background: var(--bg-primary);
    border-color: var(--primary-light);
    color: var(--text-primary);
}

.plan-calendar-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-color: transparent;
}

.plan-calendar-today {
    color: var(--primary);
}

.plan-calendar-filters {
    margin-top: var(--space-md);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
}

.plan-filter-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: 4px 8px 4px 10px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.plan-filter-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.plan-filter-item input {
    accent-color: var(--primary);
}

.plan-filter-delete {
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: var(--radius-full);
    transition: all 0.2s ease;
}

.plan-filter-delete:hover {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.plan-filter-dot,
.plan-event-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--plan-color, var(--primary));
    flex-shrink: 0;
}

.plan-filter-label {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.plan-calendar-body {
    margin-top: var(--space-md);
    overflow-x: auto;
}

.plan-calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, minmax(120px, 1fr));
    gap: var(--space-sm);
    font-weight: 700;
    color: var(--text-secondary);
    text-align: center;
    min-width: 840px;
}

.plan-calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(120px, 1fr));
    gap: var(--space-sm);
    margin-top: var(--space-sm);
    min-width: 840px;
}

.plan-calendar-cell {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: var(--space-sm);
    min-height: 140px;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.plan-calendar-cell.is-outside {
    opacity: 0.45;
}

.plan-calendar-cell.is-today {
    background: #FEE2E2;
    border-color: var(--danger);
}

.plan-calendar-date {
    font-weight: 700;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.plan-calendar-events {
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
    max-height: 120px;
    padding-right: 2px;
}

.plan-calendar-event {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 6px;
    border-radius: var(--radius-sm);
    border: 1px solid;
    border-left-width: 4px;
    font-size: 0.78rem;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: background 0.2s ease, transform 0.1s ease;
}

.plan-calendar-event:hover {
    transform: translateY(-1px);
}

.plan-calendar-event.type-study {
    border-color: #22C55E;
}

.plan-calendar-event.type-review {
    border-color: #F59E0B;
}

.plan-calendar-event.is-overdue {
    border-color: var(--danger);
    color: var(--danger);
}

.plan-calendar-event.is-complete .plan-calendar-event-title {
    text-decoration: line-through;
    color: var(--text-muted);
}

.plan-event-checkbox {
    width: 14px;
    height: 14px;
    accent-color: var(--primary);
}

.plan-calendar-week-view {
    display: grid;
    grid-template-columns: repeat(7, minmax(160px, 1fr));
    gap: var(--space-sm);
    min-width: 980px;
}

.plan-calendar-week-day {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: var(--space-sm);
    min-height: 220px;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.plan-calendar-week-day.is-today {
    background: #FEE2E2;
    border-color: var(--danger);
}

.plan-calendar-week-header {
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.plan-calendar-day-view {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: var(--space-md);
}

.plan-calendar-day-view.is-today {
    background: #FEE2E2;
    border-color: var(--danger);
}

.plan-calendar-day-header {
    display: flex;
    justify-content: space-between;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.plan-calendar-day-events {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.plan-calendar-empty {
    text-align: center;
    color: var(--text-muted);
    padding: var(--space-lg);
    font-weight: 600;
}

@media (max-width: 900px) {
    .plan-calendar-toolbar {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .plan-calendar-nav,
    .plan-calendar-view-toggle {
        justify-content: center;
    }
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.calendar-day {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid var(--border-color);
}

.calendar-day:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.calendar-date {
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.calendar-status {
    font-size: 0.85rem;
    font-weight: 700;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    display: inline-block;
    color: white;
}

.status-complete { background: linear-gradient(135deg, var(--mastered), #85E095); }
.status-incomplete { background: linear-gradient(135deg, var(--unknown), #FF8585); }
.status-noclass { background: linear-gradient(135deg, #94A3B8, #CBD5E1); }
.status-leave { background: linear-gradient(135deg, var(--warning), #FBBF24); }


/* 记录卡片 */
.record-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-sm);
    border-left: 5px solid var(--primary);
    transition: all 0.3s ease;
}

.record-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.record-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.record-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.record-meta {
    display: flex;
    gap: var(--space-lg);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.record-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.status-badge {
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    color: white;
}

.learning-badge { background: linear-gradient(135deg, var(--info), #3B82F6); }
.review-badge { background: linear-gradient(135deg, var(--accent-pink), #FF9DC0); }

/* 报告样式 */
.report-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
}

.report-header {
    text-align: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 3px solid transparent;
    border-image: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent-yellow)) 1;
}

.report-header h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
}

.report-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-card h3 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    border: none;
    padding: 0;
    margin: 0;
}

.stat-card p {
    color: var(--text-muted);
    font-weight: 600;
    margin-top: var(--space-sm);
}

.word-list {
    margin-top: var(--space-lg);
}

.word-item {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s ease;
    border-radius: var(--radius-sm);
}

.word-item:hover {
    background: var(--bg-primary);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: var(--space-lg);
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    width: 100%;
    max-width: 650px;
    box-shadow: var(--shadow-xl);
    max-height: 90vh;
    overflow-y: auto;
    animation: bounceIn 0.4s ease;
    position: relative;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-md);
    border-bottom: 3px solid transparent;
    border-image: linear-gradient(90deg, var(--primary), var(--secondary)) 1;
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.close-btn {
    background: var(--bg-primary);
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: var(--danger);
    color: white;
    transform: rotate(90deg);
}

.template-format {
    background: linear-gradient(135deg, var(--bg-primary), #FFF5E6);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin: var(--space-md) 0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    border-left: 4px solid var(--primary);
    line-height: 1.8;
}

.batch-add-area {
    width: 100%;
    height: 200px;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    font-family: 'Courier New', monospace;
    margin: var(--space-md) 0;
    resize: vertical;
    transition: border-color 0.3s ease;
}

.batch-add-area:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.15);
}


/* 导入标签 */
.import-tabs {
    display: flex;
    margin-bottom: var(--space-lg);
    border-bottom: 2px solid var(--border-color);
}

.import-tab {
    padding: var(--space-md) var(--space-xl);
    background: transparent;
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    transition: all 0.3s ease;
    position: relative;
}

.import-tab::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.import-tab:hover {
    color: var(--primary);
}

.import-tab.active {
    color: var(--primary);
    background: var(--bg-primary);
}

.import-tab.active::after {
    transform: scaleX(1);
}

/* 筛选区域 */
.filter-section {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    align-items: flex-end;
    background: var(--bg-primary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
}

.filter-item {
    display: flex;
    flex-direction: column;
    min-width: 200px;
    gap: var(--space-sm);
}

.filter-item label {
    font-weight: 700;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 单词详情 */
.word-detail-section {
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
}

.word-detail-section h4 {
    font-family: var(--font-display);
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--secondary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.word-detail-section h4 i {
    color: var(--secondary);
}

.word-detail-item {
    margin: var(--space-sm) 0;
    padding: var(--space-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary);
}

.word-detail-header {
    text-align: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--border-color);
}

.word-detail-word {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    cursor: pointer;
    transition: color 0.3s ease;
}

.word-detail-word:hover {
    color: var(--primary);
}

.word-detail-phonetic {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.word-detail-meaning {
    font-size: 1.3rem;
    color: var(--primary);
    font-weight: 600;
}

.word-detail-loading {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--primary);
}

.word-detail-error {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--danger);
}

.word-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: var(--space-xs);
}

.word-tag:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

/* 计划状态标签 */
.plan-status-tag {
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    margin-left: var(--space-sm);
}

.status-not-started { background: linear-gradient(135deg, #94A3B8, #CBD5E1); color: white; }
.status-in-progress { background: linear-gradient(135deg, var(--known), #FFE066); color: var(--text-primary); }
.status-completed { background: linear-gradient(135deg, var(--mastered), #85E095); color: white; }

/* 响应式设计 */
@media (max-width: 992px) {
    .word-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
    
    .lib-detail-container {
        flex-direction: column;
    }
    
    .unit-list {
        width: 100%;
    }
    
    .learning-settings {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
}

@media (max-width: 768px) {
    .quiz-options {
        grid-template-columns: 1fr;
    }
    
    .word-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
    
    .record-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .calendar-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .main-menu {
        padding: var(--space-lg);
        gap: var(--space-lg);
    }
    
    .spelling-display {
        min-width: 280px;
        font-size: 2rem;
    }
    
    .letter-tile {
        width: 48px;
        height: 48px;
        font-size: 1.4rem;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.5rem;
    }
    
    .header h1 i {
        font-size: 1.3rem;
    }
    
    .main-menu {
        grid-template-columns: 1fr;
    }
    
    .word-grid {
        grid-template-columns: 1fr;
    }
    
    .quiz-word {
        font-size: 2rem;
    }
    
    .spelling-controls {
        flex-direction: column;
    }
    
    .spelling-controls .btn {
        width: 100%;
        justify-content: center;
    }
    
    .top-right-buttons {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .back-btn, .refresh-btn {
        font-size: 0.85rem;
        padding: var(--space-xs) var(--space-sm);
    }
}

/* Layout overrides: full-width and square cards */
body {
    background: #fff;
    width: 100%;
    margin: 0;
}

body::before {
    display: none;
}

.container {
    max-width: 100%;
    margin: 0;
    padding: 0;
}

.page {
    border-radius: 0;
    box-shadow: none;
    min-height: 100vh;
}

.header {
    border-radius: 0;
}

.card,
.menu-card,
.word-card,
.review-card,
.record-card,
.report-card,
.stat-card,
.stat-item,
.ebbinghaus-student-card {
    border-radius: 0;
}

/* Layout override: remove content bottom overlay */
.content {
    max-height: none;
    overflow-y: visible;
}

/* Layout override: compact page actions */
.page:not(#mainPage) > .header {
    display: none;
}

.page-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    flex-wrap: wrap;
}

.pill-btn {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    padding: 6px 12px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: none;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

/* Layout override: study session word list */
#studySessionPage .word-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

#studySessionPage .word-card {
    height: auto;
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    display: grid;
    grid-template-columns: 48px auto minmax(0, 1fr) auto;
    align-items: center;
    column-gap: var(--space-md);
    border-width: 1px;
    border-left-width: 4px;
    box-shadow: none;
}

#studySessionPage .word-card::before {
    display: none;
}

#studySessionPage .word-card:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
    border-color: var(--border-color);
}

#studySessionPage .word-row-index {
    font-weight: 700;
    color: var(--text-muted);
    text-align: right;
}

#studySessionPage .status-indicator {
    position: static;
    white-space: nowrap;
}

#studySessionPage .count-indicator {
    position: absolute;
    top: -14px;
    right: -16px;
    white-space: nowrap;
    min-width: 22px;
    text-align: center;
    font-weight: 700;
    color: var(--danger);
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.25);
    padding: 1px 6px;
    border-radius: 999px;
    z-index: 1;
}

#studySessionPage .word-row-main {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

#studySessionPage .word-card h4 {
    margin: 0;
    font-size: 1.4rem;
    justify-content: flex-start;
    display: flex;
    align-items: center;
    gap: 12px;
}

#studySessionPage .word-card h4:hover,
#studySessionPage .word-card h4:active {
    transform: none;
    color: inherit;
}

#studySessionPage .word-card h4:hover i {
    transform: none;
    color: inherit;
}

#studySessionPage .word-info {
    margin: 0;
    align-items: center;
    gap: 0;
    flex-wrap: nowrap;
    flex-direction: row;
    white-space: nowrap;
    overflow: visible;
    flex: 1;
    line-height: 1.2;
}

#studySessionPage .word-info span {
    min-width: 0;
}

#studySessionPage .word-info .word-info-en {
    overflow: visible;
}

#studySessionPage .word-title,
#studySessionPage .word-info-en {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    position: relative;
    flex: 0 0 auto;
    padding-right: 28px;
    overflow: visible;
    font-size: 1.4rem;
    line-height: 1.2;
}

#studySessionPage .word-title-speaker,
#studySessionPage .word-info-speaker {
    color: var(--primary);
    opacity: 0.7;
    font-size: 0.8em;
    cursor: pointer;
}

#studySessionPage .word-info-speaker {
    margin-left: 8px;
}

#studySessionPage .word-info-meta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-left: 15px;
    color: var(--text-secondary);
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1 1 auto;
    white-space: nowrap;
    font-size: 1rem;
}

#studySessionPage .word-info-pos {
    color: var(--primary);
    font-weight: 600;
}

#studySessionPage .word-info-meaning {
    color: var(--text-secondary);
}

#studySessionPage .word-info-phonetic {
    color: var(--text-muted);
}

#studySessionPage .word-card[data-status="unknown"]:hover {
    background: #FFF5F5;
}

#studySessionPage .word-card[data-status="known"]:hover {
    background: #FFFBEB;
}

#studySessionPage .word-card[data-status="mastered"]:hover {
    background: #F0FDF4;
}

#studySessionPage .word-actions {
    margin-top: 0;
    justify-content: flex-end;
    gap: var(--space-sm);
    justify-self: end;
}

#studySessionPage .action-btn:hover,
#studySessionPage .action-btn:active {
    transform: none;
    box-shadow: var(--shadow-sm);
}

#studySessionPage .action-btn {
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
}

#studySessionPage .word-card[data-status="unknown"] {
    border-left-color: var(--unknown);
}

#studySessionPage .word-card[data-status="known"] {
    border-left-color: var(--known);
}

#studySessionPage .word-card[data-status="mastered"] {
    border-left-color: var(--mastered);
}

.word-list-header-actions {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.word-card-pill {
    border: none;
    background: linear-gradient(135deg, var(--primary), var(--accent-pink));
    color: white;
    border-radius: 999px;
    padding: 8px 16px;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.word-card-pill:active {
    transform: translateY(0);
}

.word-card-mode {
    max-width: 920px;
}

.word-card-mode-toolbar {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
}

.word-card-setting {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: 6px 12px;
    font-weight: 600;
    color: var(--text-secondary);
}

.word-card-setting input {
    width: 70px;
    padding: 4px 6px;
    text-align: center;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.word-card-stage {
    padding: var(--space-md);
    background: linear-gradient(135deg, #FFF7ED, #FFFDF8);
    border-radius: var(--radius-xl);
    border: 2px solid rgba(255, 107, 53, 0.2);
    margin-bottom: var(--space-lg);
}

.word-card-main {
    position: relative;
    background: #FFFDF6;
    border: 3px solid #1F2937;
    border-radius: 28px;
    padding: 48px 36px;
    min-height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: var(--space-md);
    cursor: pointer;
}

.word-card-progress {
    position: absolute;
    top: 18px;
    left: 18px;
    padding: 4px 10px;
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-color);
    border-radius: 999px;
}

.word-card-audio {
    position: absolute;
    top: 16px;
    right: 18px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid #1F2937;
    background: #E7F7EF;
    color: #0F766E;
    font-size: 1.1rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.word-card-english {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
}

.word-card-phonetic {
    font-size: 1.2rem;
    color: var(--text-muted);
    letter-spacing: 2px;
}

.word-card-hint {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.word-card-chinese {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: none;
}

.word-card-main.is-flipped .word-card-chinese {
    display: block;
}

.word-card-main.is-flipped .word-card-hint {
    display: none;
}

.word-card-flip {
    position: absolute;
    bottom: 18px;
    right: 18px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid #1F2937;
    background: #F0FDF4;
    color: #15803D;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.word-card-mode-toggles {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-full);
    border: 2px dashed rgba(16, 185, 129, 0.4);
    background: rgba(16, 185, 129, 0.08);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.word-card-mode-toggles input {
    margin-right: var(--space-sm);
    accent-color: var(--success);
}

.word-card-mode-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.plan-calendar-year-row {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    color: var(--text-secondary);
}

.plan-calendar-year-row select {
    flex: 1;
}

.plan-calendar-month-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-sm);
}

.plan-calendar-month-btn {
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    padding: 8px 0;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.plan-calendar-month-btn:hover {
    background: var(--bg-primary);
    border-color: var(--primary-light);
    color: var(--text-primary);
}

.plan-calendar-month-btn.is-active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-color: transparent;
}

@media (max-width: 768px) {
    #studySessionPage .word-card {
        grid-template-columns: 1fr;
        row-gap: var(--space-sm);
    }

    #studySessionPage .word-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .word-card-pill {
        width: 100%;
        justify-content: center;
    }

    .word-card-mode {
        max-width: 95vw;
    }

    .word-card-english {
        font-size: 2.2rem;
    }

    .word-card-main {
        padding: 36px 20px;
        min-height: 260px;
    }
}

/* 复习模式顶部信息栏 */
.review-mode-info-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #FFF5EE 0%, #FFF0E6 100%);
    padding: var(--space-sm) var(--space-lg);
    margin: 0;
    border-bottom: 1px solid rgba(255, 107, 53, 0.15);
}

.review-mode-info-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.review-mode-icon {
    color: var(--primary);
    font-size: 1.1rem;
}

.review-mode-title {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--primary);
    font-size: 0.95rem;
}

.review-mode-list {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
}

.review-mode-count {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.review-mode-info-right {
    display: flex;
    align-items: center;
}

.pronunciation-btn-group {
    display: flex;
    gap: 0;
}

.pronunciation-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-body);
}

.pronunciation-btn:first-child {
    border-radius: 0;
}

.pronunciation-btn:last-child {
    border-radius: 0;
    border-left: none;
}

.pronunciation-btn:hover {
    background: var(--bg-primary);
    color: var(--primary);
    border-color: var(--primary-light);
}

.pronunciation-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-color: var(--primary);
}

.pronunciation-btn i {
    font-size: 0.75rem;
}

@media (max-width: 768px) {
    .review-mode-info-bar {
        flex-direction: column;
        gap: var(--space-sm);
        padding: var(--space-sm);
    }
    
    .review-mode-info-left {
        justify-content: center;
        text-align: center;
    }
    
    .review-mode-info-right {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .pronunciation-btn {
        padding: 4px 8px;
        font-size: 0.75rem;
    }
    
    .pronunciation-btn i {
        font-size: 0.7rem;
    }
}


/* ========================================
   登录页面样式
   ======================================== */

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    padding: var(--space-lg);
}

.login-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: var(--space-xl);
    width: 100%;
    max-width: 420px;
    animation: bounceIn 0.6s ease-out;
}

.login-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.login-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-md);
    background: linear-gradient(135deg, var(--primary), var(--accent-pink));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    box-shadow: 0 8px 20px rgba(255, 107, 53, 0.3);
    animation: float 3s ease-in-out infinite;
}

.login-header h1 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    font-weight: 900;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.login-form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
}

.login-form-group label i {
    margin-right: var(--space-xs);
    color: var(--primary);
}

.login-form-group input {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.login-form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

.login-btn {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(135deg, var(--primary), var(--accent-pink));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

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

.login-message {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    font-size: 0.9rem;
    text-align: center;
}

.login-message.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.login-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.login-message.info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info);
    border: 1px solid var(--info);
}

.login-footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.login-footer p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: var(--space-xs);
}

.login-footer p i {
    margin-right: var(--space-xs);
    color: var(--info);
}

/* ========================================
   用户信息显示样式
   ======================================== */

.user-info {
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.user-info-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    color: white;
    font-size: 0.95rem;
}

.user-info-content i {
    margin-right: var(--space-xs);
}

.user-info-compact {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    color: white;
    font-size: 0.9rem;
    white-space: nowrap;
}

.user-info-compact .user-name {
    font-weight: 600;
}

.user-info-compact i {
    margin-right: var(--space-xs);
}

.account-type {
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
}

.account-type.admin {
    background: rgba(168, 85, 247, 0.9);
    color: white;
}

.account-type.trial {
    background: rgba(245, 158, 11, 0.9);
    color: white;
}

.account-type.formal {
    background: rgba(16, 185, 129, 0.9);
    color: white;
}

.remaining-days {
    padding: var(--space-xs) var(--space-md);
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
}

.btn-logout {
    padding: var(--space-xs) var(--space-md);
    background: rgba(239, 68, 68, 0.9);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-logout:hover {
    background: rgba(220, 38, 38, 0.9);
    transform: translateY(-1px);
}

/* ========================================
   账号管理页面样式
   ======================================== */

.account-badge {
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
}

.account-badge.admin {
    background: rgba(168, 85, 247, 0.1);
    color: var(--accent-purple);
    border: 1px solid var(--accent-purple);
}

.account-badge.trial {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border: 1px solid var(--warning);
}

.account-badge.formal {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.status-badge {
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
}

.status-badge.active {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.status-badge.expired {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.btn-small {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.85rem;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    margin-right: var(--space-xs);
    font-weight: 600;
}

.btn-small:last-child {
    margin-right: 0;
}

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

.btn-small.btn-info:hover {
    background: #2563EB;
    transform: translateY(-1px);
}

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

.btn-small.btn-success:hover {
    background: #059669;
    transform: translateY(-1px);
}

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

.btn-small.btn-warning:hover {
    background: #D97706;
    transform: translateY(-1px);
}

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

.btn-small.btn-danger:hover {
    background: #DC2626;
    transform: translateY(-1px);
}

.btn-small i {
    margin-right: var(--space-xs);
}