/* 课程卡片样式（类似Unity页面） */

/* 统一的页面标题区域样式（和Unity页面完全一致） */
.course-page-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0 1.5rem 0;
}

.course-page-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: #1a2e53;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.course-page-header p {
    font-size: 1rem;
    color: #6c757d;
    margin: 0;
    line-height: 1.6;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

/* 课程卡片容器 */
#courseCardsContainer {
    margin-top: 2rem;
}

/* 确保卡片网格布局和Unity页面完全一致 */
#courseCardsContainer .row {
    margin-left: -1rem;
    margin-right: -1rem;
}

#courseCardsContainer .row > [class*="col-"] {
    padding-left: 1rem;
    padding-right: 1rem;
    margin-bottom: 1.5rem;
}

/* 课程卡片样式（和Unity页面完全一致 - 2行3列网格布局） */
.course-card-modern {
    background: #fff;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.06);
    margin-bottom: 0;
}

/* 卡片悬停时的动态效果（和Unity页面完全一致） */
.course-card-modern:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

/* 卡片光效动画（和Unity页面完全一致） */
.course-card-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
    z-index: 1;
    pointer-events: none;
}

.course-card-modern:hover::before {
    left: 100%;
}

/* 卡片头部布局（和Unity页面完全一致 - 图标在左上角，标题在右侧，标签在标题下方） */
.course-card-header {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
    width: 100%;
}

/* 标题和标签容器（和Unity页面完全一致） */
.course-header-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 0; /* 防止内容溢出 */
    align-items: flex-start;
}

/* 课程图标样式（和Unity页面完全一致 - 左上角蓝色圆形播放图标） */
.course-icon {
    width: 48px !important;
    height: 48px !important;
    min-width: 48px !important;
    min-height: 48px !important;
    border-radius: 50% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: #fff !important;
    font-size: 1.5rem !important;
    flex-shrink: 0 !important;
    transition: transform 0.3s ease;
    /* 强制所有图标都是蓝色圆形，和Unity页面完全一致 */
    background: #2196f3 !important;
    box-shadow: 0 2px 8px rgba(33, 150, 243, 0.25) !important;
    margin: 0 !important;
    padding: 0 !important;
    order: -1; /* 确保图标在最左边 */
}

.course-icon:hover {
    transform: scale(1.1);
}

/* 确保所有图标类都使用蓝色 */
.course-icon.icon-blue,
.course-icon.icon-orange,
.course-icon.icon-red,
.course-icon.icon-pink,
.course-icon[class*="icon"] {
    background: #2196f3 !important;
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3) !important;
}

.course-icon i {
    color: #fff !important;
    font-size: 1.75rem !important;
}

/* 强制所有图标都是播放图标样式，和Unity页面完全一致 */
.course-icon i.fa-play-circle,
.course-icon i.fa-code,
.course-icon i.fa-java,
.course-icon i.fa-html5,
.course-icon i.fa-palette,
.course-icon i.fa-book,
.course-icon i[class*="fa-"] {
    color: #fff !important;
    font-size: 1.75rem !important;
}

/* 标签基础样式（和Unity页面完全一致） */
.course-tag {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
    width: fit-content;
    align-self: flex-start;
    letter-spacing: 0.01em;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    margin-top: 0.25rem;
    /* 不设置默认颜色，由具体标签类控制 */
}

/* 标签颜色样式（和Unity页面完全一致） */
.course-tag.tag-free {
    background: #4caf50 !important;
    color: #fff !important;
}

.course-tag.tag-advanced {
    background: #ff9800 !important;
    color: #fff !important;
}

.course-tag.tag-practical {
    background: #2196f3 !important;
    color: #fff !important;
}

.course-tag.tag-expert {
    background: #f44336 !important;
    color: #fff !important;
}

/* 确保所有标签都有默认样式 */
.course-tag:not(.tag-free):not(.tag-advanced):not(.tag-practical):not(.tag-expert) {
    background: #4caf50 !important;
    color: #fff !important;
}

/* 移除重复的默认样式，避免覆盖标签颜色 */

.course-card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 2;
}

/* 课程标题样式（和Unity页面完全一致） */
.course-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #1a2e53;
    margin: 0;
    line-height: 1.4;
    letter-spacing: -0.01em;
    width: 100%;
    word-wrap: break-word;
}

.course-description {
    color: #666;
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    flex: 1;
    min-height: 3rem;
}

.course-learning-points {
    list-style: none;
    padding: 0;
    margin: 0 0 1.25rem 0;
}

.course-learning-points li {
    padding: 0.4rem 0;
    color: #333;
    font-size: 0.875rem;
    line-height: 1.6;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.course-learning-points li i {
    margin-top: 0.15rem;
    flex-shrink: 0;
    color: #4caf50 !important;
    font-size: 0.85rem;
}

.course-learning-points li span {
    flex: 1;
    color: #333;
}

.course-learning-points li:last-child {
    border-bottom: none;
}


.course-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid #f0f0f0;
}

.course-duration {
    color: #666;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    font-weight: 500;
}

.course-duration i {
    margin-right: 0.25rem;
}

.btn-start-learning {
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: none !important;
    background: #2196f3 !important;
    color: #fff !important;
    letter-spacing: 0.01em;
    box-shadow: 0 2px 6px rgba(33, 150, 243, 0.25);
}

.btn-start-learning:hover,
.btn-start-learning:focus,
.btn-start-learning:active {
    background: #1976d2 !important;
    color: #fff !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

/* 确保所有开始学习按钮都使用相同的蓝色背景（和Unity页面完全一致） */
button.btn-start-learning,
a.btn-start-learning,
.btn.btn-start-learning,
.btn-primary.btn-start-learning {
    background: #2196f3 !important;
    color: #fff !important;
    border: none !important;
    box-shadow: 0 2px 8px rgba(33, 150, 243, 0.25) !important;
}

/* 覆盖Bootstrap的btn-primary样式 */
.btn-primary.btn-start-learning:not(:hover):not(:focus):not(:active) {
    background-color: #2196f3 !important;
    border-color: #2196f3 !important;
}

/* 响应式设计 - 移动端 */
@media (max-width: 768px) {
    .course-page-header {
        margin-bottom: 2rem;
        padding: 1.5rem 1rem;
    }
    
    .course-page-header h2 {
        font-size: 1.75rem;
        line-height: 1.3;
    }
    
    .course-page-header p {
        font-size: 0.95rem;
        padding: 0 0.5rem;
    }
    
    #courseCardsContainer {
        margin-top: 1.5rem;
    }
    
    #courseCardsContainer .row > [class*="col-"] {
        margin-bottom: 1.25rem;
    }
    
    .course-card-modern {
        padding: 1.25rem;
    }
    
    .course-card-header {
        gap: 0.6rem;
        margin-bottom: 0.75rem;
    }
    
    .course-icon {
        width: 44px !important;
        height: 44px !important;
        min-width: 44px !important;
        min-height: 44px !important;
        font-size: 1.25rem !important;
    }
    
    .course-icon i {
        font-size: 1.35rem !important;
    }
    
    .course-title {
        font-size: 1.05rem;
        line-height: 1.4;
    }
    
    .course-description {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }
    
    .course-learning-points li {
        font-size: 0.85rem;
        padding: 0.35rem 0;
    }
    
    .course-footer {
        flex-direction: column;
        gap: 0.75rem;
        padding-top: 0.75rem;
    }
    
    .btn-start-learning {
        width: 100%;
        min-height: 48px;
        padding: 0.65rem 1.25rem;
        font-size: 0.95rem;
    }
    
    .course-duration {
        font-size: 0.85rem;
    }
}

@media (max-width: 576px) {
    .course-page-header {
        margin-bottom: 1.5rem;
        padding: 1rem 0.5rem;
    }
    
    .course-page-header h2 {
        font-size: 1.5rem;
    }
    
    .course-page-header p {
        font-size: 0.9rem;
    }
    
    .course-card-modern {
        padding: 1rem;
    }
    
    .course-icon {
        width: 40px !important;
        height: 40px !important;
        min-width: 40px !important;
        min-height: 40px !important;
        font-size: 1.1rem !important;
    }
    
    .course-title {
        font-size: 1rem;
    }
    
    .course-tag {
        font-size: 0.7rem;
        padding: 0.2rem 0.6rem;
    }
    
    .btn-start-learning {
        min-height: 44px;
        font-size: 0.9rem;
    }
}