/* Windows 10 磁贴风格CSS */
:root {
    --primary-color: #0078D4;
    --primary-hover: #106EBE;
    --secondary-color: #00BCF2;
    --accent-color: #FFB900;
    --success-color: #107C10;
    --warning-color: #FF8C00;
    --error-color: #E81123;
    --info-color: #5E5E5E;
    
    --tile-bg-primary: #0078D4;
    --tile-bg-secondary: #00BCF2;
    --tile-bg-info: #5E5E5E;
    --tile-bg-warning: #FF8C00;
    --tile-bg-success: #107C10;
    
    --bg-color: #F3F2F1;
    --surface-color: #FFFFFF;
    --text-primary: #323130;
    --text-secondary: #605E5C;
    --text-light: #A19F9D;
    --border-color: #EDEBE9;
    
    --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-heavy: 0 8px 16px rgba(0,0,0,0.2);
    
    --border-radius: 4px;
    --transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px 0;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* 主内容区域 */
.main-content {
    width: 100%;
}

/* 节切换 */
.hidden {
    display: none !important;
}

/* 主菜单磁贴网格 */
.tiles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.tile {
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    overflow: hidden;
    position: relative;
    min-height: 150px;
}

.tile:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.tile:active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

.tile-primary {
    background-color: var(--tile-bg-primary);
}

.tile-secondary {
    background-color: var(--tile-bg-secondary);
}

.tile-info {
    background-color: var(--tile-bg-info);
}

.tile-warning {
    background-color: var(--tile-bg-warning);
}

.tile-content {
    padding: 24px;
    color: white;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.tile-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.tile-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.tile-desc {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* 内容节样式 */
.content-section {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    padding: 24px;
    margin-top: 20px;
}

.section-header {
    display: flex;
    align-items: center;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

.back-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 1rem;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    margin-right: 16px;
}

.back-btn:hover {
    background-color: rgba(0, 120, 212, 0.1);
}

.section-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* 学习模式样式 */
.learning-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.search-input {
    flex: 1;
    min-width: 200px;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 120, 212, 0.2);
}

.view-toggle {
    display: flex;
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.toggle-btn {
    padding: 10px 16px;
    border: none;
    background: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

.toggle-btn:not(.active):hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.amino-acids-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.amino-acids-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* 分组显示样式 */
.amino-acids-grouped {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.amino-acids-list-grouped {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.group-header {
    margin-bottom: 16px;
}

.group-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.group-line {
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), transparent);
    width: 100%;
}

.amino-group-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.amino-group-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* 宽屏列表格式 - 紧凑显示 */
@media (min-width: 768px) {
    .amino-group-list {
        gap: 8px;
    }
    
    .amino-card {
        display: flex;
        align-items: center;
        padding: 12px 16px;
    }
    
    .amino-card-header {
        flex: 0 0 auto;
        margin-bottom: 0;
        margin-right: 16px;
        align-items: center;
    }
    
    .amino-name {
        font-size: 1rem;
        margin-right: 12px;
    }
    
    .amino-single {
        font-size: 1rem;
        padding: 2px 6px;
    }
    
    .amino-card-body {
        flex: 1;
        display: flex;
        align-items: center;
        gap: 16px;
        flex-wrap: wrap;
    }
    
    .amino-three {
        font-size: 0.95rem;
    }
    
    .amino-property,
    .amino-pkr {
        font-size: 0.85rem;
        margin: 0;
    }
}

.amino-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    transition: var(--transition);
    cursor: pointer;
}

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

.amino-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.amino-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.amino-single {
    background-color: var(--primary-color);
    color: white;
    padding: 4px 8px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1.1rem;
}

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

.amino-three {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.amino-property {
    font-size: 0.9rem;
    padding: 2px 8px;
    border-radius: 12px;
    background-color: var(--bg-color);
    color: var(--text-secondary);
}

.amino-pkr {
    font-size: 0.9rem;
    padding: 2px 8px;
    border-radius: 12px;
    background-color: var(--accent-color);
    color: white;
    font-weight: 500;
}

/* 测验模式样式 */
.quiz-setup {
    text-align: center;
    padding: 40px 20px;
}

.quiz-setup h3 {
    font-size: 1.5rem;
    margin-bottom: 32px;
    color: var(--text-primary);
}

.quiz-categories {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.quiz-category {
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow-light);
}

.quiz-category h4 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 16px;
    text-align: center;
    font-weight: 600;
}

.quiz-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.quiz-option-btn {
    padding: 20px;
    background-color: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    font-weight: 500;
}

.quiz-option-btn:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-light);
}

.quiz-content {
    max-width: 600px;
    margin: 0 auto;
}

.quiz-progress {
    text-align: center;
    margin-bottom: 24px;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.quiz-question {
    background-color: var(--bg-color);
    padding: 24px;
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    text-align: center;
}

.quiz-question h3 {
    font-size: 1.4rem;
    color: var(--text-primary);
}

.answer-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.answer-option {
    padding: 16px;
    background-color: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    font-size: 1rem;
}

.answer-option:hover:not(.disabled) {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-light);
}

.answer-option.selected {
    border-color: var(--primary-color);
    background-color: rgba(0, 120, 212, 0.1);
}

.answer-option.correct {
    border-color: var(--success-color);
    background-color: rgba(16, 124, 16, 0.1);
}

.answer-option.incorrect {
    border-color: var(--error-color);
    background-color: rgba(232, 17, 35, 0.1);
}

.answer-option.disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.quiz-controls {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.quiz-btn {
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    font-weight: 500;
}

.quiz-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

.quiz-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.feedback {
    padding: 16px;
    border-radius: var(--border-radius);
    margin-top: 16px;
    text-align: center;
    font-weight: 500;
}

.feedback.correct {
    background-color: rgba(16, 124, 16, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.feedback.incorrect {
    background-color: rgba(232, 17, 35, 0.1);
    color: var(--error-color);
    border: 1px solid var(--error-color);
}

.quiz-result {
    text-align: center;
    padding: 40px 20px;
}

.quiz-result h3 {
    font-size: 1.8rem;
    margin-bottom: 32px;
    color: var(--text-primary);
}

.result-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.stat-item {
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: var(--border-radius);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--primary-color);
}

.result-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* 进度页面样式 */
.progress-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.progress-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
}

.progress-card h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
}

.amino-progress-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.amino-progress-item {
    position: relative;
    padding: 12px;
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 8px;
}

.amino-progress-name {
    font-weight: 500;
    color: var(--text-primary);
    position: relative;
    z-index: 2;
}

.amino-progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background-color: var(--border-color);
    border-radius: var(--border-radius);
    z-index: 1;
}

.amino-progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    transition: width 0.3s ease;
    z-index: 1;
}

.amino-progress-text {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.8rem;
    color: var(--text-secondary);
    z-index: 2;
    font-weight: 500;
}

.progress-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* 设置页面样式 */
.settings-content {
    max-width: 600px;
    margin: 0 auto;
}

.setting-group {
    margin-bottom: 32px;
}

.setting-group h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-item:last-child {
    border-bottom: none;
}

.setting-item label {
    font-weight: 500;
    color: var(--text-primary);
}

.setting-item select,
.setting-item input[type="checkbox"] {
    cursor: pointer;
}

.setting-item select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--surface-color);
    font-size: 0.9rem;
}

.setting-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
}

.setting-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 32px;
}

.action-btn {
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    font-weight: 500;
}

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

.action-btn.secondary {
    background-color: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.action-btn.secondary:hover {
    background-color: var(--border-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 16px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .tiles-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 16px;
    }
    
    .amino-acids-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 16px;
    }
    
    .answer-options {
        grid-template-columns: 1fr;
    }
    
    .quiz-options {
        grid-template-columns: 1fr;
    }
    
    .learning-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .back-btn {
        margin-bottom: 12px;
        margin-right: 0;
    }
}

@media (max-width: 480px) {
    .tile-content {
        padding: 16px;
    }
    
    .tile-icon {
        font-size: 2rem;
    }
    
    .tile-title {
        font-size: 1.1rem;
    }
    
    .content-section {
        padding: 16px;
    }
    
    .result-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-grid {
        grid-template-columns: 1fr;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 120, 212, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 120, 212, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 120, 212, 0);
    }
}

.pulse {
    animation: pulse 2s infinite;
}