.courses-loading{text-align:center;color:var(--color-text-light);padding:var(--spacing-2xl);font-style:italic}.course-card-skeleton{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-md);animation:1.5s ease-in-out infinite course-skeleton-pulse}.skeleton-image{background:var(--color-border);border-radius:var(--radius-sm);width:100%;height:140px;margin-bottom:var(--spacing-sm)}.skeleton-text{background:var(--color-border);margin-bottom:var(--spacing-xs);border-radius:4px}.skeleton-title{width:70%;height:1.2em}.skeleton-desc{width:100%;height:.9em}.skeleton-desc-short{width:50%;height:.9em}@keyframes course-skeleton-pulse{0%,to{opacity:.5}50%{opacity:1}}.courses-empty{text-align:center;padding:var(--spacing-2xl);border-radius:var(--radius-lg);border:1px solid var(--color-border);background:#fff}.courses-empty p{color:var(--color-text-light);margin:0}.courses-empty-hint{font-size:.875rem;margin-top:var(--spacing-sm)!important}.courses-list{gap:var(--spacing-xl);margin-top:var(--spacing-xl);grid-template-columns:repeat(auto-fill,minmax(280px,1fr));display:grid}.course-card{background:var(--color-bg);border-radius:var(--radius-lg);border:1px solid var(--color-border);color:var(--color-text);text-decoration:none;transition:transform .2s,box-shadow .2s;display:block;overflow:hidden}.course-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.course-card .course-image{object-fit:cover;width:100%;height:auto}.course-card .course-info{padding:var(--spacing-lg)}.course-card h2{margin-bottom:var(--spacing-sm);text-transform:uppercase;font-size:1.1rem}.course-card p{color:var(--color-text-light);font-size:.9rem}.login-prompt-actions{gap:var(--spacing-md);justify-content:flex-end;display:flex}.course-card-meta{color:var(--color-text-light);align-items:center;gap:4px;margin-top:2px;margin-bottom:4px;font-size:.7rem;display:flex}.course-card-number{font-family:var(--font-body)}.course-card-meta-sep{opacity:.5}.course-card-version{color:var(--color-text-light);font-size:.7rem;display:inline-block}.course-card-version.version-clickable{cursor:help;border-bottom:1px dotted var(--color-text-light)}.course-card-version.version-clickable:hover{color:var(--color-primary);border-bottom-color:var(--color-primary)}.course-image-placeholder{aspect-ratio:1024/400;background:linear-gradient(135deg, var(--color-bg-section) 0%, var(--color-border) 100%);border:2px dashed var(--color-border);justify-content:center;align-items:center;width:100%;display:flex}.course-image-placeholder .placeholder-text{color:var(--color-text-light);text-align:center;padding:var(--spacing-md);font-size:.875rem}.course-card-actions{align-items:center;gap:4px;display:flex}.course-sections{gap:var(--spacing-lg);margin-top:var(--spacing-xl);flex-direction:column;display:flex}.course-section .courses-list{margin-top:var(--spacing-md)}.course-new-badge{text-transform:uppercase;letter-spacing:.3px;color:var(--color-warning);border:1px solid var(--color-warning);background:0 0;border-radius:3px;flex-shrink:0;align-items:center;padding:1px 5px;font-size:10px;font-weight:500;display:inline-flex}.course-new-count{color:var(--color-warning);font-weight:600}