/* Biology Subject - Color Variables */
:root {
    --biology-primary: #4CAF50;
    --biology-secondary: #66BB6A;
    --biology-accent: #A5D6A7;
    --biology-light: #E8F5E9;
    --biology-dark: #2E7D32;
}

/* Hero Section Styling */
.subject-hero {
    background: linear-gradient(135deg, var(--biology-light) 0%, rgba(232, 245, 233, 0.8) 100%);
    padding: var(--spacing-xxl) 0;
}

.subject-hero-content h1 {
    color: var(--biology-dark);
}

.subject-hero-content .gradient-text {
    background: linear-gradient(90deg, var(--biology-primary), var(--biology-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.subject-description {
    color: var(--text-light);
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
}

.section-header .gradient-text {
    background: linear-gradient(90deg, var(--biology-primary), var(--biology-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Topics Section Styling */
.topic-card {
    transition: all 0.3s ease;
}

.topic-card:hover {
    border-color: var(--biology-secondary);
}

.topic-icon {
    background-color: rgba(76, 175, 80, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
}

.topic-icon i {
    font-size: 24px;
    color: var(--biology-primary);
}

/* AI Assistant Section */
.ai-assistant-section {
    background-color: var(--bg-color);
    padding: var(--spacing-xxl) 0;
}

.chat-header {
    background-color: var(--biology-primary);
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
    color: white;
}

.chat-header i {
    font-size: 24px;
    margin-right: var(--spacing-sm);
}

.assistant-features .feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: rgba(76, 175, 80, 0.1);
    margin-right: var(--spacing-md);
}

.assistant-features .feature-icon i {
    font-size: 20px;
    color: var(--biology-primary);
}

/* Logo styling */
.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
}

.logo i {
    font-size: 24px;
    margin-right: var(--spacing-xs);
    color: var(--biology-primary);
}

/* Classification Section Styling */
.classification-section {
    padding: var(--spacing-xxl) 0;
}

.classification-container {
    background-color: var(--bg-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    position: relative;
}

.classification-controls {
    margin-bottom: var(--spacing-lg);
}

.button-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
    flex-wrap: wrap;
}

.property-btn {
    padding: 0.5rem 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--bg-dark);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

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

.taxonomy-wrapper {
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--bg-dark);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

/* Virtual Lab Section */
.virtual-lab-section {
    padding: var(--spacing-xxl) 0;
}

.lab-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.lab-card {
    background-color: var(--bg-color);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.lab-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--biology-secondary);
}

.lab-icon {
    background-color: rgba(76, 175, 80, 0.1);
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin: 0 auto var(--spacing-md);
}

.lab-icon i {
    font-size: 28px;
    color: var(--biology-primary);
}

.lab-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}

.lab-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--biology-primary);
    color: var(--biology-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

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

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

/* Custom button styles */
.btn-primary {
    background-color: var(--biology-primary);
    border-color: var(--biology-primary);
}

.btn-primary:hover {
    background-color: var(--biology-dark);
    border-color: var(--biology-dark);
}

/* Quiz section customization */
.quiz-section .btn-primary {
    background-color: var(--biology-primary);
    border-color: var(--biology-primary);
}

.quiz-option.selected {
    background-color: var(--biology-secondary);
    border-color: var(--biology-secondary);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .button-group {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: var(--spacing-sm);
    }
    
    .taxonomy-wrapper {
        min-height: 300px;
    }
    
    .lab-options {
        grid-template-columns: 1fr;
    }
}

/* Profile Button styling */
.profile-button {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
}

.profile-button:hover {
    background-color: var(--bg-light);
}

.profile-button i {
    margin-right: var(--spacing-xs);
    color: var(--biology-primary);
    font-size: 18px;
}

/* 遗传学页面样式 */
:root {
    --primary-color: #4caf50;
    --secondary-color: #2196f3;
    --accent-color: #ff6b6b;
    --light-bg: #f9f9f9;
    --dark-bg: #333;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* 通用卡片样式 */
.concept-card, .info-card, .highlight-box, .definition-box, .fact-box {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.concept-card:hover, .info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

.concept-card h3, .info-card h4, .highlight-box h4, .definition-box h4 {
    color: var(--primary-color);
    margin-top: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 多列布局 */
.two-column, .three-column {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.two-column > * {
    flex: 1 1 calc(50% - 1.5rem);
    min-width: 250px;
}

.three-column > * {
    flex: 1 1 calc(33.333% - 1.5rem);
    min-width: 200px;
}

/* 特殊框样式 */
.highlight-box {
    background-color: rgba(76, 175, 80, 0.1);
    border-left: 4px solid var(--primary-color);
}

.definition-box {
    background-color: rgba(33, 150, 243, 0.1);
    border-left: 4px solid var(--secondary-color);
}

.fact-box {
    background-color: rgba(255, 107, 107, 0.1);
    border-left: 4px solid var(--accent-color);
}

/* 按钮样式 */
.trait-btn, .action-btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

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

.trait-btn.secondary {
    background-color: transparent;
    color: var(--secondary-color);
    border: 1px solid var(--secondary-color);
}

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

.trait-btn:hover, .action-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.trait-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin: 1rem 0;
}

/* 互动模块样式 */
.interactive-module {
    margin-bottom: 2rem;
}

.interactive-animation {
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.interactive-animation img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.animation-controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

/* 遗传实验相关样式 */
.parent-setup {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.parent-card {
    flex: 1 1 calc(50% - 1.5rem);
    min-width: 200px;
    padding: 1rem;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    text-align: center;
}

.allele-input {
    width: 40px;
    height: 40px;
    text-align: center;
    font-size: 1.2rem;
    font-weight: bold;
    border: 2px solid var(--primary-color);
    border-radius: 4px;
    margin: 0 0.25rem;
}

.genotype-input {
    margin: 1rem 0;
}

/* 棋盘法分析 */
.punnett-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 2px;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
}

.punnett-cell {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 60px;
    font-weight: bold;
    border-radius: 4px;
}

.punnett-header {
    background-color: rgba(33, 150, 243, 0.2);
}

.punnett-result {
    background-color: rgba(76, 175, 80, 0.2);
}

.ratio-display {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1rem 0;
}

.ratio-item {
    background-color: var(--light-bg);
    padding: 0.75rem;
    border-radius: var(--border-radius);
    text-align: center;
    flex: 1;
    min-width: 100px;
}

.ratio-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.ratio-label {
    font-size: 0.9rem;
    color: var(--dark-bg);
}

/* 基因表达步骤 */
.gene-expression {
    margin-top: 1.5rem;
}

.expression-steps {
    position: relative;
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.expression-step {
    position: relative;
    padding: 1rem 1rem 1rem 3rem;
    margin-bottom: 1.5rem;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
}

.step-number {
    position: absolute;
    left: -1.5rem;
    top: 50%;
    transform: translateY(-50%);
    width: 3rem;
    height: 3rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
}

/* 序列分析工具 */
.sequence-analyzer {
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.sequence-input {
    width: 100%;
    height: 80px;
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-family: monospace;
    margin: 0.5rem 0 1rem;
    resize: vertical;
}

.analysis-results {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-top: 1rem;
}

/* 碱基颜色 */
.base-a { color: #4CAF50; }
.base-t { color: #F44336; }
.base-g { color: #2196F3; }
.base-c { color: #FFC107; }

/* 测验样式 */
.quiz-container {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.quiz-question {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #eee;
}

.quiz-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
    margin: 1rem 0;
}

.quiz-option {
    padding: 0.75rem;
    background-color: var(--light-bg);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.quiz-option:hover {
    background-color: rgba(76, 175, 80, 0.1);
}

.quiz-option.selected {
    background-color: rgba(33, 150, 243, 0.1);
    border: 2px solid var(--secondary-color);
}

.quiz-option.correct {
    background-color: rgba(76, 175, 80, 0.2);
    border: 2px solid var(--primary-color);
}

.quiz-option.incorrect {
    background-color: rgba(244, 67, 54, 0.1);
    border: 2px solid #F44336;
}

.quiz-feedback {
    padding: 0.75rem;
    border-radius: 4px;
    margin-top: 0.75rem;
    display: none;
}

.quiz-feedback.correct {
    background-color: rgba(76, 175, 80, 0.1);
    color: var(--primary-color);
}

.quiz-feedback.incorrect {
    background-color: rgba(244, 67, 54, 0.1);
    color: #F44336;
}

.quiz-result {
    margin-top: 1.5rem;
}

/* 资源链接 */
.resource-link {
    display: inline-block;
    margin-right: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.resource-link:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* 数据库链接和资源链接容器 */
.database-links, .resource-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.resource-links {
    margin-top: 0.5rem;
}

.database-links .info-card {
    flex: 1 1 calc(33.333% - 1rem);
    min-width: 250px;
}

@media (max-width: 768px) {
    .database-links .info-card {
        flex: 1 1 100%;
    }
    
    .resource-links {
        flex-direction: column;
    }
    
    .resource-links .resource-link {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }
}

/* DNA结构标签页固定样式 */
#dna-panel {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

#dna-panel .info-card {
    word-wrap: break-word;
    overflow-wrap: break-word;
}

#dna-panel img {
    max-width: 100%;
    height: auto;
}

#dna-panel .three-column {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    width: 100%;
}

#dna-panel .three-column > * {
    flex: 1 1 calc(33.333% - 1rem);
    min-width: 250px;
    word-break: break-word;
}

.dna-explorer {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.dna-display {
    flex: 1 1 60%;
    min-width: 300px;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 1rem;
    text-align: center;
    overflow: hidden;
}

.dna-info {
    flex: 1 1 35%;
    min-width: 250px;
}

.dna-canvas {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.base-sequence {
    font-family: monospace;
    font-size: 1.2rem;
    background-color: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    overflow-x: auto;
    white-space: nowrap;
}

/* 基因组学标签页固定样式 */
#analysis-panel {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

#analysis-panel .info-card {
    word-wrap: break-word;
    overflow-wrap: break-word;
}

#analysis-panel img {
    max-width: 100%;
    height: auto;
}

#analysis-panel .three-column {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    width: 100%;
}

#analysis-panel .three-column > * {
    flex: 1 1 calc(33.333% - 1rem);
    min-width: 250px;
    word-break: break-word;
}

/* 移动端响应式适配 */
@media (max-width: 768px) {
    .two-column > *, .three-column > * {
        flex: 1 1 100%;
    }

    .parent-card {
        flex: 1 1 100%;
    }

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

    .punnett-cell {
        height: 50px;
    }

    .trait-controls {
        justify-content: center;
    }

    .step-number {
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1.2rem;
    }

    .expression-step {
        padding-left: 2rem;
    }
    
    /* 移动端基因组学标签页修复 */
    #analysis-panel .three-column > * {
        flex: 1 1 100%;
        min-width: 100%;
    }
    
    #analysis-panel .info-card {
        padding: 1rem;
    }
    
    /* 移动端DNA结构标签页修复 */
    #dna-panel .three-column > * {
        flex: 1 1 100%;
        min-width: 100%;
    }
    
    #dna-panel .info-card {
        padding: 1rem;
    }
    
    .dna-explorer {
        flex-direction: column;
    }
    
    .dna-display, .dna-info {
        width: 100%;
    }
}

/* 平板端响应式适配 */
@media (min-width: 769px) and (max-width: 1024px) {
    .three-column > * {
        flex: 1 1 calc(50% - 1.5rem);
    }
    
    .punnett-grid {
        max-width: 250px;
    }
    
    /* 平板端基因组学标签页修复 */
    #analysis-panel .three-column > * {
        flex: 1 1 calc(50% - 1rem);
    }
    
    /* 平板端DNA结构标签页修复 */
    #dna-panel .three-column > * {
        flex: 1 1 calc(50% - 1rem);
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.tab-panel {
    animation: fadeIn 0.5s ease;
}

/* 工具提示样式 */
[data-tooltip] {
    position: relative;
    cursor: help;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    width: max-content;
    max-width: 250px;
    background-color: var(--dark-bg);
    color: white;
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    z-index: 10;
}

[data-tooltip]:hover::after {
    opacity: 1;
    bottom: 110%;
}