/* 欧姆定律演示样式文件 */

/* CSS变量定义 */
:root {
    /* 主色调 */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-blue: #3498db;
    --primary-red: #e74c3c;
    --primary-green: #2ecc71;
    --primary-orange: #f39c12;
    --primary-purple: #9b59b6;
    
    /* 中性色 */
    --background-color: #f5f7fa;
    --card-background: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --border-color: #e9ecef;
    
    /* 状态色 */
    --success-color: #27ae60;
    --error-color: #e74c3c;
    --warning-color: #f1c40f;
    --info-color: #3498db;
    
    /* 电路颜色 */
    --wire-color: #2c3e50;
    --voltage-color: #e74c3c;
    --current-color: #3498db;
    --resistance-color: #f39c12;
    --power-color: #9b59b6;
}

/* 基础重置和全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
}

/* 头部样式 */
header {
    background: var(--primary-gradient);
    color: white;
    text-align: center;
    padding: 1.5rem 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: relative;
}

.nav-bar {
    position: absolute;
    top: 1rem;
    left: 2rem;
}

.back-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.back-link:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateX(-3px);
}

h1 {
    text-align: center;
    margin-top: 1rem;
    font-size: 2.5rem;
    font-weight: 300;
}

/* 主要内容区域 */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* 响应式网格布局 */
.container {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 2rem;
    }
}

/* 卡片样式 */
.card {
    background-color: var(--card-background);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.card h2 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    border-bottom: 2px solid var(--primary-blue);
    padding-bottom: 0.5rem;
}

.card h3 {
    color: var(--text-primary);
    margin-bottom: 0.8rem;
    font-size: 1.2rem;
}

/* 模拟容器样式 */
.simulation-container {
    grid-column: span 2;
}

@media (max-width: 1024px) {
    .simulation-container {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .simulation-container {
        grid-column: span 1;
    }
}

.simulation {
    position: relative;
    margin-bottom: 1rem;
}

#circuit-canvas {
    width: 100%;
    height: 300px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background-color: #fafafa;
}

/* 实时信息显示 */
.real-time-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: 4px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem;
    background-color: white;
    border-radius: 4px;
    border-left: 4px solid var(--primary-blue);
}

.info-item:nth-child(1) { border-left-color: var(--voltage-color); }
.info-item:nth-child(2) { border-left-color: var(--current-color); }
.info-item:nth-child(3) { border-left-color: var(--resistance-color); }
.info-item:nth-child(4) { border-left-color: var(--power-color); }

/* 控制按钮样式 */
.controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.button {
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-blue);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s;
    min-width: 100px;
}

.button:hover {
    background-color: #2980b9;
    transform: translateY(-1px);
}

.button:active {
    transform: translateY(0);
}

.button:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
    transform: none;
}

#start-btn {
    background-color: var(--success-color);
}

#start-btn:hover {
    background-color: #229954;
}

#stop-btn {
    background-color: var(--error-color);
}

#stop-btn:hover {
    background-color: #c0392b;
}

#reset-btn {
    background-color: var(--warning-color);
    color: var(--text-primary);
}

#reset-btn:hover {
    background-color: #d4ac0d;
}
/* 参数设置样式 */
.parameters {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* 动态添加的参数容器 */
#current-slider-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    animation: fadeIn 0.3s ease-out;
}

.parameter {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.parameter label {
    font-weight: 600;
    color: var(--text-primary);
}

.parameter input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
}

.parameter input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-blue);
    cursor: pointer;
    transition: all 0.2s;
}

.parameter input[type="range"]::-webkit-slider-thumb:hover {
    background: #2980b9;
    transform: scale(1.1);
}

.parameter input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-blue);
    cursor: pointer;
    border: none;
}

.parameter span {
    font-weight: bold;
    color: var(--primary-blue);
    text-align: center;
    padding: 0.25rem;
    background-color: #f8f9fa;
    border-radius: 4px;
}

/* 参数模式选择 */
.parameter-mode {
    margin-top: 1rem;
}

.parameter-mode label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: normal;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.radio-group label:hover {
    background-color: #f8f9fa;
}

.radio-group input[type="radio"] {
    margin: 0;
}

/* 物理量显示样式 */
.physics-values {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.physics-value {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background-color: #f8f9fa;
    border-radius: 4px;
    border-left: 4px solid var(--primary-blue);
}

.physics-value:nth-child(2) { border-left-color: var(--voltage-color); }
.physics-value:nth-child(3) { border-left-color: var(--current-color); }
.physics-value:nth-child(4) { border-left-color: var(--resistance-color); }
.physics-value:nth-child(5) { border-left-color: var(--power-color); }
.physics-value:nth-child(6) { border-left-color: var(--primary-purple); }

.physics-value span:first-child {
    font-weight: 600;
    color: var(--text-primary);
}

.physics-value span:last-child {
    font-weight: bold;
    color: var(--primary-blue);
    font-family: 'Courier New', monospace;
}

/* 图表容器样式 */
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.chart-wrapper {
    height: 400px;
    position: relative;
}

.chart-wrapper h3 {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.chart-wrapper canvas {
    width: 100% !important;
    height: calc(100% - 3rem) !important;
}

/* 教学内容样式 */
.explanation {
    margin-bottom: 2rem;
}

.explanation p {
    margin-bottom: 1rem;
    text-align: justify;
    line-height: 1.8;
}

.key-concepts,
.key-formulas,
.thinking-questions,
.applications {
    margin-bottom: 2rem;
}

.key-concepts ul,
.thinking-questions ul,
.applications ul {
    list-style-type: none;
    padding-left: 0;
}

.key-concepts li,
.thinking-questions li,
.applications li {
    margin-bottom: 0.8rem;
    padding: 0.8rem;
    background-color: #f8f9fa;
    border-radius: 4px;
    border-left: 4px solid var(--primary-blue);
    transition: all 0.2s;
}

.key-concepts li:hover,
.thinking-questions li:hover,
.applications li:hover {
    background-color: #e9ecef;
    transform: translateX(5px);
}

.key-concepts li strong {
    color: var(--primary-blue);
}

.formula {
    background-color: #f8f9fa;
    padding: 1.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    font-family: 'Courier New', monospace;
}

.formula p {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.formula strong {
    color: var(--primary-blue);
}

/* 知识检测样式 */
.interactive-quiz {
    margin-bottom: 2rem;
}

.quiz-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.quiz-question {
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.quiz-question p {
    margin-bottom: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.quiz-question input[type="number"] {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    width: 150px;
    margin-right: 1rem;
}

.quiz-question input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.quiz-question button {
    margin-right: 1rem;
}

.quiz-question span {
    font-weight: bold;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.quiz-question span.correct {
    background-color: var(--success-color);
    color: white;
}

.quiz-question span.incorrect {
    background-color: var(--error-color);
    color: white;
}

/* 页脚样式 */
footer {
    background-color: var(--text-primary);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

/* 动画效果 */
.transition {
    transition: all 0.3s ease;
}

.hover-effect:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.loading {
    animation: pulse 1.5s infinite;
}

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

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* 电路动画效果 */
@keyframes current-flow {
    0% { stroke-dashoffset: 0; }
    100% { stroke-dashoffset: -20; }
}

.current-animation {
    stroke-dasharray: 5 5;
    animation: current-flow 1s linear infinite;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .real-time-info {
        grid-template-columns: 1fr;
    }
    
    .controls {
        flex-direction: column;
        align-items: center;
    }
    
    .charts-container {
        grid-template-columns: 1fr;
    }
    
    .quiz-question {
        text-align: center;
    }
    
    .quiz-question input[type="number"] {
        width: 100%;
        margin-bottom: 1rem;
        margin-right: 0;
    }
    
    .quiz-question button {
        width: 100%;
        margin-bottom: 0.5rem;
        margin-right: 0;
    }
}

/* 打印样式 */
@media print {
    .controls,
    .interactive-quiz {
        display: none;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
    
    body {
        background-color: white;
    }
}