/* 全局样式 */
:root {
    --primary-color: #ff3366;
    --secondary-color: #6c63ff;
    --accent-color: #4caf50;
    --background-color: #f5f5f5;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-light: #666666;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --animation-speed: 0.3s;
    --sidebar-width: 300px;
}

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color var(--animation-speed) ease;
}

a:hover {
    color: var(--secondary-color);
}

/* 导航栏样式 */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 15px 0;
    box-shadow: 0 2px 5px var(--shadow-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 32px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-links a {
    color: white;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 4px;
    transition: background-color var(--animation-speed) ease;
}

.nav-links a:hover, .nav-links a.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* 流量统计样式 */
.traffic-stats {
    display: flex;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.2);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: white;
    white-space: nowrap;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    animation: pulse 2s infinite;
}

.traffic-stats i {
    margin-right: 5px;
    color: rgba(255, 255, 255, 0.9);
}

.traffic-stats strong {
    font-weight: 700;
    color: rgba(255, 255, 255, 0.95);
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.3);
    }
    70% {
        box-shadow: 0 0 0 6px rgba(255, 255, 255, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
    }
}

/* 搜索部分样式 */
.search-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 50px 0;
    color: white;
    text-align: center;
}

.search-title {
    font-size: 2rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    border-radius: 50px;
    overflow: hidden;
}

.search-input {
    flex: 1;
    padding: 15px 25px;
    border: none;
    outline: none;
    font-size: 1rem;
}

.search-button {
    background-color: white;
    color: var(--primary-color);
    border: none;
    padding: 0 25px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: background-color var(--animation-speed) ease;
}

.search-button:hover {
    background-color: #f0f0f0;
}

/* 侧边栏切换按钮 */
.sidebar-toggle {
    position: fixed;
    left: 20px;
    top: 150px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--animation-speed) ease, background-color var(--animation-speed) ease;
}

.sidebar-toggle:hover {
    background-color: var(--secondary-color);
    transform: scale(1.05);
}

/* 遮罩层 */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 98;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--animation-speed) ease, visibility var(--animation-speed) ease;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 筛选器侧边栏 */
.sidebar-container {
    position: fixed;
    top: 0;
    left: -110%; /* 使用更大的负值确保完全隐藏 */
    width: var(--sidebar-width);
    height: 100%;
    background-color: white;
    z-index: 99;
    box-shadow: 2px 0 10px var(--shadow-color);
    transition: left var(--animation-speed) ease, visibility var(--animation-speed) ease;
    overflow-y: auto; /* 保留整个侧边栏的滚动 */
    visibility: hidden; /* 添加隐藏属性 */
}

.sidebar-container.active {
    left: 0;
    visibility: visible; /* 激活时显示 */
}

.filters-container {
    padding: 20px;
}

.filters-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--primary-color);
}

.filter-group {
    margin-bottom: 20px;
}

.filter-title {
    font-size: 1.1rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--secondary-color);
}

.total-count {
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: normal;
}

.filter-search {
    margin-bottom: 10px;
}

.filter-search-input {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--animation-speed) ease;
}

.filter-search-input:focus {
    border-color: var(--primary-color);
}

.filter-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    /* 移除最大高度限制和滚动条 */
    max-height: none;
    overflow-y: visible;
}

.filter-item {
    display: flex;
    align-items: center;
}

.filter-checkbox {
    margin-right: 8px;
    cursor: pointer;
}

.filter-label {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    width: 100%;
    flex-wrap: wrap; /* 允许在小屏幕上换行 */
}

.filter-count {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 筛选按钮 */
.filter-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    position: sticky; /* 使按钮固定在底部 */
    bottom: 20px;
    background-color: white;
    padding-top: 10px;
    z-index: 2;
}

.apply-filters-btn, .reset-filters-btn {
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color var(--animation-speed) ease, transform var(--animation-speed) ease;
}

.apply-filters-btn {
    background-color: var(--primary-color);
    color: white;
    flex: 2;
}

.reset-filters-btn {
    background-color: #e0e0e0;
    color: var(--text-color);
    flex: 1;
}

.apply-filters-btn:hover, .reset-filters-btn:hover {
    transform: translateY(-2px);
}

.apply-filters-btn:hover {
    background-color: var(--secondary-color);
}

.reset-filters-btn:hover {
    background-color: #d0d0d0;
}

/* 主要内容 */
.main-content {
    padding: 30px 0;
    min-height: 60vh;
}

.content-wrapper {
    transition: margin-left var(--animation-speed) ease;
}

.content-wrapper.sidebar-active {
    margin-left: var(--sidebar-width);
}

/* 加载指示器 */
.loading-indicator {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 51, 102, 0.2);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}

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

/* 错误消息 */
.error-message {
    text-align: center;
    padding: 40px 0;
    color: #d32f2f;
    font-size: 1.2rem;
}

.no-results {
    text-align: center;
    padding: 40px 0;
    color: var(--text-light);
    font-size: 1.2rem;
}

/* 谱面卡片网格 */
.levels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

/* 谱面卡片样式 */
.level-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: transform var(--animation-speed) ease, box-shadow var(--animation-speed) ease;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.5s forwards;
    animation-delay: calc(var(--card-index) * 0.1s);
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative; /* 添加相对定位，方便放置绝对定位元素 */
}

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

.level-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-color);
}

.card-image {
    position: relative;
    height: 180px;
    overflow: hidden;
    flex-shrink: 0;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--animation-speed) ease;
}

.level-card:hover .card-image img {
    transform: scale(1.05);
}

/* 添加卡片描述样式 */
.card-description {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 15px;
    background-color: rgba(0, 0, 0, 0.75);
    color: white;
    font-size: 0.9rem;
    transform: translateY(-100%);
    transition: transform var(--animation-speed) ease;
    z-index: 2;
    max-height: 180px;
    overflow-y: auto;
}

.level-card:hover .card-description {
    transform: translateY(0);
}

/* 添加同行评审标记样式 */
.peer-reviewed-badge {
    background-color: var(--accent-color);
    color: white;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    font-size: 0.7rem;
    margin-right: 5px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    position: relative;
    top: -1px;
}

.difficulty-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

.easy {
    background-color: var(--accent-color);
}

.medium {
    background-color: #ff9800;
}

.tough {
    background-color: #f44336;
}

.expert {
    background-color: #9c27b0;
}

.card-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-title {
    font-size: 1.2rem;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-artist {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 15px;
}

.card-tag {
    background-color: #f0f0f0;
    padding: 3px 8px;
    border-radius: 15px;
    font-size: 0.8rem;
    color: var(--text-light);
}

.card-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: auto; /* 推到底部 */
}

.download-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    text-align: center;
    transition: background-color var(--animation-speed) ease;
    display: inline-block;
}

.primary-download {
    flex: 2;
}

.secondary-download {
    flex: 1;
    background-color: var(--secondary-color);
    font-size: 0.9rem;
}

.download-button.disabled {
    background-color: #cccccc;
    cursor: not-allowed;
    color: #666666;
}

.download-button:hover:not(.disabled) {
    background-color: var(--secondary-color);
    color: white;
}

.secondary-download:hover {
    background-color: var(--primary-color);
}

/* 分页样式 */
.pagination {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
    flex-wrap: wrap;
    z-index: 90;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.15);
    max-width: 90%;
    transition: opacity 0.3s ease, transform 0.3s ease;
    opacity: 0.5;
    transform: translateY(0);
}

.pagination:hover {
    opacity: 1;
    transform: translateY(-5px);
}

.page-info {
    margin: 0 10px;
    color: var(--text-light);
    font-size: 0.85rem;
    white-space: nowrap;
}

.page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: white;
    color: var(--text-color);
    font-weight: 500;
    transition: background-color var(--animation-speed) ease, color var(--animation-speed) ease;
    box-shadow: 0 2px 5px var(--shadow-color);
}

.page-link.active {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 3px 8px rgba(255, 51, 102, 0.3);
}

.page-link:hover:not(.active):not(.disabled) {
    background-color: #f0f0f0;
    transform: translateY(-2px);
}

.page-link.disabled {
    color: var(--text-light);
    opacity: 0.5;
    cursor: default;
    background-color: #f5f5f5;
    box-shadow: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 10px;
    }
    
    .search-box {
        flex-direction: column;
        border-radius: 10px;
    }
    
    .search-input {
        border-radius: 10px 10px 0 0;
    }
    
    .search-button {
        border-radius: 0 0 10px 10px;
        padding: 10px;
    }
    
    .levels-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .content-wrapper.sidebar-active {
        margin-left: 0; /* 不移动内容区 */
    }
    
    .sidebar-container {
        width: 85%; /* 在移动设备上减小宽度 */
        left: -110%; /* 确保彻底隐藏 */
    }
    
    /* 流量统计在移动设备上的样式 */
    .traffic-stats {
        margin-top: 10px;
        font-size: 0.8rem;
        padding: 4px 10px;
        width: 100%;
        justify-content: center;
        order: 3;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
    }
    
    .nav-links a {
        margin: 5px;
    }
    
    /* 优化移动端筛选器样式 */
    .filter-group {
        margin-bottom: 15px;
    }
    
    .filter-label {
        font-size: 0.95rem;
    }
    
    .filter-actions {
        position: sticky;
        bottom: 0;
        padding: 15px 0;
        background-color: white;
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
        margin: 0 -20px;
        padding: 15px 20px;
        width: calc(100% + 40px);
    }
    
    .apply-filters-btn, .reset-filters-btn {
        padding: 12px 15px;
        font-size: 1rem;
    }
    
    /* 调整侧边栏切换按钮位置 */
    .sidebar-toggle {
        top: auto;
        bottom: 80px;
        left: 15px;
    }
    
    .page-info {
        display: none;  /* 在移动设备上隐藏页码信息文本 */
    }
    
    .pagination {
        padding: 8px;
        bottom: 15px;
        right: 15px;
    }
    
    .page-link {
        width: 35px;
        height: 35px;
    }
    
    /* 调整移动端的卡片描述 */
    .card-description {
        font-size: 0.8rem;
        padding: 10px;
    }
    
    .peer-reviewed-badge {
        width: 20px;
        height: 20px;
        font-size: 0.8rem;
    }
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: white;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: #ccc;
}

.footer-links a:hover {
    color: white;
}

.footer-copyright {
    color: #999;
    text-align: center;
    font-size: 0.9rem;
    margin-top: 10px;
}