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20px}.library-empty-title{font-family:var(--font-pixel);font-size:11px;color:var(--text-muted);margin-bottom:10px}.library-empty-hint{font-size:14px;color:var(--text-faint);line-height:1.6}.course-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--r-lg);overflow:hidden;transition:border-color .15s,box-shadow .15s}.course-card-open{border-color:var(--accent);box-shadow:var(--shadow-sm)}.course-card-header{display:flex;align-items:center;gap:10px;padding:14px 16px;cursor:pointer;-webkit-user-select:none;user-select:none;transition:background .12s}.course-card-header:hover{background:var(--bg-muted)}.course-card-name{font-weight:700;font-size:14px;margin-bottom:2px}.course-card-meta{font-size:11px;color:var(--text-faint)}.course-expand-chevron{font-size:10px;color:var(--text-faint);transition:transform .15s}.course-card-body{padding:4px 16px 14px;border-top:1px solid var(--border-soft)}.course-exam-row{display:flex;align-items:center;gap:10px;padding:10px 0 8px;font-size:12px}.course-exam-label{color:var(--text-faint);font-weight:600;flex-shrink:0}.course-exam-set-btn{background:none;border:none;cursor:pointer;padding:3px 8px;border:1px solid var(--border);border-radius:var(--r-sm);font-family:var(--font-body);font-size:12px;color:var(--accent-dark);transition:background .12s,border-color .12s}.course-exam-set-btn:hover{background:var(--bg-muted);border-color:var(--accent)}.course-exam-input{border:1px solid var(--accent);border-radius:var(--r-sm);padding:3px 8px;font-size:12px;background:var(--bg-muted);color:var(--text)}.library-section-list{display:flex;flex-direction:column;gap:6px;margin-top:4px}.library-section-row{display:flex;align-items:flex-start;gap:10px;padding:10px 12px;background:var(--bg-muted);border-radius:var(--r-md);border:1px solid var(--border-soft)}.library-section-title{font-weight:600;font-size:13px;margin-bottom:2px}.library-section-summary{font-size:11px;color:var(--text-faint);line-height:1.4}.library-section-actions{display:flex;flex-direction:column;gap:5px;flex-shrink:0;align-items:flex-end}.course-card-footer{display:flex;justify-content:flex-end;margin-top:10px;padding-top:10px;border-top:1px solid var(--border-soft)}.exam-badge{display:inline-block;background:#154360;color:#85c1e9;border-radius:var(--r-sm);font-size:10px;font-weight:700;padding:2px 7px;font-family:var(--font-pixel)}.exam-badge-urgent{background:#4a1a1a;color:var(--red);animation:pulse-urgent 2s ease-in-out infinite}@keyframes pulse-urgent{0%,to{opacity:1}50%{opacity:.7}}.btn-xs{font-size:11px;padding:4px 10px;border-radius:var(--r-sm);font-family:var(--font-pixel);cursor:pointer;white-space:nowrap;transition:background .12s,border-color .12s}.btn-outline{background:transparent;border:1.5px solid var(--border);color:var(--text-muted)}.btn-outline:hover{border-color:var(--accent);color:var(--accent-dark)}.btn-green-outline{background:transparent;border:1.5px solid var(--green-dark);color:var(--green-dark)}.btn-green-outline:hover{background:var(--green-light)}.library-tab-wrap{border:1.5px solid var(--border);border-top:none;border-radius:0 0 var(--r-md) var(--r-md);padding:12px;background:var(--bg-muted)}.library-course-row{margin-bottom:6px}.library-course-btn{display:flex;align-items:center;gap:8px;width:100%;text-align:left;background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--r-md);padding:10px 12px;cursor:pointer;transition:border-color .12s,background .12s;font-family:var(--font-body)}.library-course-btn:hover{border-color:var(--accent);background:var(--bg-muted)}.library-course-row-active .library-course-btn{border-color:var(--green-dark);background:#4a7c5914}.library-course-name{font-weight:600;font-size:13px;color:var(--text)}.library-course-meta{font-size:11px;color:var(--text-faint)}.save-course-prompt{margin-top:10px;padding:12px;background:#4a7c5912;border:1.5px dashed var(--green-dark);border-radius:var(--r-md)}.save-course-label{font-size:12px;font-weight:600;color:var(--green-dark);margin-bottom:8px;display:block}.exam-warning-banner{display:flex;align-items:center;gap:8px;padding:10px 14px;background:#4a1a1a99;border:1.5px solid var(--red);border-radius:var(--r-md);font-size:13px}.exam-warning-icon{font-size:14px;flex-shrink:0}.exam-warning-text{flex:1;color:var(--text);line-height:1.4}.exam-warning-text strong{color:var(--red)}.next-due-btn{position:relative;overflow:hidden}.next-due-btn:before{content:"";position:absolute;top:0;left:-100%;width:60%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.07),transparent);animation:shimmer-next 2s ease-in-out infinite}@keyframes shimmer-next{0%{left:-100%}to{left:200%}}