.class-card .card-bg-icon{position:absolute;top:1rem;right:1rem;font-size:4rem;color:var(--primary);opacity:.05;transition:transform .3s,opacity .3s}.class-card .card-bg-icon svg{width:100%;height:100%}.class-card:hover .card-bg-icon{transform:rotate(5deg) scale(1.1);opacity:.08}.card-action{font-weight:600;color:var(--primary);transition:transform .2s}.class-card:hover .card-action{transform:translateX(5px)}.breadcrumb-container{max-width:var(--max-width);margin:0 auto;padding:1rem var(--padding-x)}.breadcrumb{display:flex;flex-wrap:wrap;padding:0;margin:0;list-style:none}.breadcrumb-item{display:flex;align-items:center}.breadcrumb-item a{color:var(--text-secondary);text-decoration:none}.breadcrumb-item a:hover{color:var(--primary)}.breadcrumb-item.active{color:var(--text-primary);font-weight:500}.breadcrumb-item+.breadcrumb-item::before{content:"/";display:inline-block;padding:0 .5rem;color:var(--text-secondary)}.topic-header{max-width:800px;margin:0 auto 2rem auto;padding:0 var(--padding-x)}.progress-container{display:flex;align-items:center;gap:1rem;margin-top:1rem}.progress-container span{font-size:.9rem;color:var(--text-secondary);white-space:nowrap}.progress-bar{width:100%;height:8px;background-color:var(--border-color);border-radius:4px;overflow:hidden}.progress-bar div{height:100%;background-color:var(--primary);border-radius:4px}.micro-topic-list{max-width:800px;margin:2rem auto;display:flex;flex-direction:column;gap:1rem}.micro-topic-item{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;background-color:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);text-decoration:none;color:var(--text-primary);transition:transform .2s,box-shadow .2s}.micro-topic-item.unlocked:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.micro-topic-content h3{margin:0 0 .25rem 0;font-size:1.2rem;color:var(--text-headings)}.micro-topic-content p{margin:0;color:var(--text-secondary)}.micro-topic-action .btn{padding:.5rem 1.5rem;font-weight:600}.micro-topic-item.locked{background-color:var(--bg-secondary);cursor:not-allowed;opacity:.7}.micro-topic-item.locked .micro-topic-content h3,.micro-topic-item.locked .micro-topic-content p{color:var(--text-muted)}.micro-topic-item.locked .lock-icon{font-size:1.5rem;color:var(--text-muted)}.learn-container{max-width:800px;margin:2rem auto;background-color:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);overflow:hidden}.learn-header{padding:2rem 2rem 1rem 2rem}.learn-header h1{margin:0}.learn-body{padding:1rem 2rem 2rem 2rem;font-size:1.1rem;line-height:1.6}.learn-footer{display:flex;justify-content:flex-end;gap:1rem;padding:1rem 2rem 2rem 2rem;background-color:var(--bg-secondary);border-top:1px solid var(--border-color)}