:root{--primary:#4f46e5;--primary-hover:#4338ca;--success:#10b981;--success-hover:#059669;--bg-color:#f3f4f6;--card-bg:#fff;--text-main:#1f2937;--text-muted:#6b7280;--border-color:#e5e7eb}*{box-sizing:border-box;margin:0;padding:0;font-family:Segoe UI,system-ui,sans-serif}body{background-color:var(--bg-color);color:var(--text-main);line-height:1.6}.container{max-width:800px;margin:0 auto;padding:0 20px}.hidden{display:none!important}.navbar{background-color:var(--primary);margin-bottom:30px;padding:15px 0;box-shadow:0 2px 4px #0000001a}.brand{color:#fff;font-size:1.5rem;font-weight:700;text-decoration:none}.text-center{text-align:center}.mb-sm{margin-bottom:10px}.mb-md{margin-bottom:20px}.mt-sm{margin-top:10px}.mt-lg{margin-top:30px}.my-lg{margin:40px 0}.row{flex-wrap:wrap;gap:20px;display:flex}.col{flex:1;min-width:250px}.header-action{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;margin-bottom:20px;padding:25px;box-shadow:0 4px 6px #0000000d}.form-group{margin-bottom:20px}.drop-zone{border:2px dashed var(--border-color);border-radius:8px;transition:all .2s;position:relative}.drop-zone.dragover{border-color:var(--primary);background:#eef2ff}.drop-zone textarea{background:0 0;border:none;width:100%;padding:12px;font-size:1rem;display:block}.drop-zone-overlay{color:#fff;opacity:0;pointer-events:none;background:#4f46e5e6;border-radius:6px;justify-content:center;align-items:center;width:100%;height:100%;transition:opacity .2s;display:flex;position:absolute;top:0;left:0}.drop-zone.dragover .drop-zone-overlay{opacity:1}.file-list{flex-wrap:wrap;gap:8px;display:flex}.file-item{background:#e5e7eb;border-radius:4px;align-items:center;gap:6px;padding:4px 10px;font-size:.85rem;display:flex}.file-item .remove-file{cursor:pointer;color:#991b1b;font-weight:700}label{color:var(--text-main);margin-bottom:8px;font-weight:600;display:block}input[type=text],input[type=file],select,textarea{border:1px solid var(--border-color);border-radius:8px;width:100%;padding:12px;font-size:1rem;transition:border-color .2s}input[type=text]:focus,select:focus,textarea:focus{border-color:var(--primary);outline:none}textarea{resize:vertical}.btn{cursor:pointer;text-align:center;border:none;border-radius:8px;padding:12px 20px;font-size:1rem;font-weight:600;transition:all .2s;display:inline-block}.btn-block{width:100%;padding:15px;font-size:1.1rem}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:var(--success-hover)}.btn-outline{border:2px solid var(--primary);color:var(--primary);background:0 0}.btn-outline:hover{background:var(--primary);color:#fff}.vraag-header{justify-content:space-between;align-items:center;margin-bottom:15px;display:flex}.tag{color:var(--primary);background:#e0e7ff;border-radius:20px;padding:4px 10px;font-size:.85rem;font-weight:600}.vraag-text{margin-bottom:20px;font-size:1.1rem;font-weight:600}.optie-label{cursor:pointer;border:1px solid var(--border-color);background:#f9fafb;border-radius:8px;align-items:center;gap:10px;margin-bottom:12px;padding:12px;transition:background .2s;display:flex}.optie-label:hover{background:#f3f4f6}.chat-wrapper{border-top:1px solid var(--border-color);margin-top:20px;padding-top:20px}.chat-messages{border:1px solid var(--border-color);background:#f9fafb;border-radius:8px;flex-direction:column;gap:10px;max-height:250px;margin-bottom:15px;padding:10px;display:flex;overflow-y:auto}.chat-bubble{border-radius:14px;max-width:80%;padding:10px 14px;font-size:.95rem;line-height:1.4;animation:.3s ease-out fadeIn}.chat-bubble.user{background:var(--primary);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}.chat-bubble.ai{color:var(--text-main);background:#e5e7eb;border-bottom-left-radius:4px;align-self:flex-start}.chat-input-group{gap:10px;display:flex}.chat-input-group input{flex:1}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.result-card{border-left:5px solid}.success-card{border-left-color:var(--success)}.warning-card{border-left-color:#f59e0b}.primary-card{border-left-color:var(--primary)}.feedback-item{margin-bottom:20px}.feedback-header{border-radius:8px 8px 0 0;padding:12px;font-weight:600}.feedback-body{border:1px solid var(--border-color);background:#fff;border-top:none;border-radius:0 0 8px 8px;padding:15px}.status-correct{color:#065f46;background:#d1fae5}.status-deels{color:#92400e;background:#fef3c7}.status-incorrect{color:#991b1b;background:#fee2e2}.spinner{border:4px solid var(--border-color);border-top:4px solid var(--primary);border-radius:50%;width:40px;height:40px;margin:0 auto 15px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.progress-bar-bg{background:#e5e7eb;border-radius:5px;width:100%;max-width:400px;height:10px;margin:0 auto;overflow:hidden}.progress-bar-fill{background:var(--primary);width:0%;height:100%;transition:width .3s}.alert-info{color:#1e40af;background:#dbeafe;border:1px solid #bfdbfe;border-radius:8px;margin-bottom:20px;padding:15px}