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h2{font-size:20px}.flashcard-counter{color:var(--text-muted);font-size:14px;font-weight:600}.flashcard-progress-bar{background:#e0e0e0;border-radius:2px;height:4px;margin-bottom:24px;overflow:hidden}.flashcard-progress-fill{background:var(--primary);height:100%;transition:width .3s}.flashcard{background:var(--surface);border-radius:var(--radius);cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:center;align-items:center;min-height:280px;padding:48px 32px;transition:box-shadow .2s;display:flex;box-shadow:0 2px 12px #0000001a}.flashcard:hover{box-shadow:0 4px 20px #00000026}.flashcard-front,.flashcard-back{text-align:center;width:100%}.flashcard-label{text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:16px;font-size:11px;font-weight:700}.flashcard-text{font-size:18px;line-height:1.6}.flashcard-hint{color:var(--text-muted);margin-top:24px;font-size:13px}.flashcard-back{background:0 0}.flashcard-back .flashcard-text{color:var(--primary);font-weight:600}.flashcard-buttons{justify-content:center;gap:12px;margin-top:24px;display:flex}.btn-incorrect{color:#fff;border-radius:var(--radius);cursor:pointer;background:#c62828;border:none;padding:12px 32px;font-size:15px;font-weight:600}.btn-incorrect:hover{background:#b71c1c}.btn-correct{color:#fff;border-radius:var(--radius);cursor:pointer;background:#2e7d32;border:none;padding:12px 32px;font-size:15px;font-weight:600}.btn-correct:hover{background:#1b5e20}.flashcard-done{text-align:center;max-width:500px;margin:0 auto}.flashcard-done h1{margin-bottom:24px}.flashcard-score{background:var(--surface);border-radius:var(--radius);margin-bottom:20px;padding:32px;box-shadow:0 2px 8px #00000014}.score-number{color:var(--primary);margin-bottom:8px;font-size:64px;font-weight:800;line-height:1}.flashcard-score p{color:var(--text-muted);font-size:15px}.flashcard-stats{justify-content:center;gap:12px;margin-bottom:24px;display:flex}.stat{border-radius:var(--radius);padding:6px 16px;font-size:14px;font-weight:600}.stat.correct{color:#2e7d32;background:#e8f5e9}.stat.incorrect{color:#c62828;background:#ffebee}.flashcard-actions{justify-content:center;gap:12px;display:flex}.slide{margin-bottom:16px}.slide h4{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;font-size:13px}.slide h5{margin-bottom:6px;font-size:17px}.slide p{margin-bottom:6px;line-height:1.6}.slide-images{margin:12px 0}.slide img{border-radius:var(--radius)}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:8px;display:grid}.stat-card{background:var(--surface);border-radius:var(--radius);text-align:center;padding:20px;box-shadow:0 1px 3px #0000000f}.stat-value{color:var(--primary);margin-bottom:4px;font-size:32px;font-weight:800;line-height:1}.stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:12px;font-weight:600}.mini-progress{align-items:center;gap:8px;display:flex}.mini-progress-bar{background:#e0e0e0;border-radius:3px;width:60px;height:6px;overflow:hidden}.mini-progress-fill{background:var(--primary);height:100%}.mini-progress span{color:var(--text-muted);font-size:12px}.forum-filters{border-bottom:2px solid var(--border);gap:0;margin-bottom:20px;display:flex}.forum-filter{cursor:pointer;color:var(--text-muted);background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-2px;padding:8px 16px;font-size:13px;font-weight:600}.forum-filter:hover{color:var(--text)}.forum-filter.active{color:var(--primary);border-bottom-color:var(--primary)}.forum-create-form{background:var(--surface);border-radius:var(--radius);flex-direction:column;gap:12px;margin-bottom:20px;padding:20px;display:flex;box-shadow:0 1px 3px #0000000f}.forum-create-form input,.forum-create-form textarea{border:1px solid var(--border);border-radius:var(--radius);width:100%;padding:10px 14px;font-family:inherit;font-size:14px}.forum-create-form textarea{resize:vertical;min-height:100px}.forum-posts{flex-direction:column;gap:0;display:flex}.forum-post-card{background:var(--surface);border-bottom:1px solid var(--border);color:var(--text);justify-content:space-between;align-items:center;padding:16px 20px;text-decoration:none;display:flex}.forum-post-card:first-child{border-radius:var(--radius) var(--radius) 0 0}.forum-post-card:last-child{border-radius:0 0 var(--radius) var(--radius);border-bottom:none}.forum-post-card:hover{background:#fafafa;text-decoration:none}.forum-post-left{align-items:flex-start;gap:12px;display:flex}.forum-status-dot{border-radius:50%;width:10px;min-width:10px;height:10px;margin-top:6px}.forum-status-dot.open{background:var(--primary)}.forum-status-dot.resolved{background:var(--success)}.forum-post-card h3{margin-bottom:2px;font-size:15px}.forum-post-meta{color:var(--text-muted);font-size:12px}.forum-detail-header{justify-content:space-between;align-items:flex-start;margin-bottom:16px;display:flex}.forum-detail-header h1{font-size:22px}.forum-detail-body{background:var(--surface);border-radius:var(--radius);padding:24px;line-height:1.7;box-shadow:0 1px 3px #0000000f}.forum-replies{flex-direction:column;gap:12px;margin-bottom:24px;display:flex}.forum-reply{background:var(--surface);border-radius:var(--radius);padding:16px 20px;box-shadow:0 1px 3px #0000000f}.forum-reply.instructor{border-left:3px solid var(--primary)}.forum-reply-header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.forum-reply-user{align-items:center;gap:8px;display:flex}.forum-reply-body{font-size:14px;line-height:1.6}.forum-reply-form{flex-direction:column;gap:12px;display:flex}.forum-reply-form textarea{border:1px solid var(--border);border-radius:var(--radius);resize:vertical;min-height:80px;padding:12px 16px;font-family:inherit;font-size:14px}.certificate-empty{text-align:center;padding:60px 20px}.certificate-empty h1{margin-bottom:12px}.certificate-empty p{color:var(--text-muted);margin-bottom:24px}.certificate-page{justify-content:center;padding:20px 0;display:flex}.certificate-card{width:100%;max-width:700px}.certificate-preview{background:var(--surface);border:2px solid var(--navbar-bg);border-radius:var(--radius);text-align:center;padding:48px 40px;position:relative}.cert-badge{text-transform:uppercase;letter-spacing:.1em;color:var(--primary);margin-bottom:24px;font-size:13px;font-weight:700}.certificate-preview h2{margin-bottom:8px;font-size:28px}.certificate-preview h3{color:var(--primary);margin:8px 0;font-size:22px}.certificate-preview p{color:var(--text-muted);margin:4px 0;font-size:15px}.cert-footer{color:var(--text-muted);justify-content:space-between;margin-top:32px;font-size:12px;display:flex}.certificate-actions{text-align:center;margin-top:20px}.toast{border-radius:var(--radius);color:#fff;cursor:pointer;z-index:1000;align-items:center;gap:10px;padding:14px 24px;font-size:14px;font-weight:500;animation:.3s ease-out toast-in;display:flex;position:fixed;bottom:24px;right:24px;box-shadow:0 4px 16px #0003}@keyframes toast-in{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.toast-success{background:var(--success)}.toast-error{background:var(--danger)}.toast-info{background:var(--navbar-bg)}.toast-icon{font-size:18px;font-weight:700}.empty{color:var(--text-muted);text-align:center;padding:24px;font-size:14px}.loading{min-height:200px;color:var(--text-muted);justify-content:center;align-items:center;display:flex}.site-footer{text-align:center;color:var(--text-muted);border-top:1px solid var(--border);margin-top:48px;padding:24px;font-size:13px}.site-footer a{color:var(--primary);font-weight:500;text-decoration:none}.site-footer a:hover{text-decoration:underline}