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h1{font-size:1.4rem}.workspace-svg{height:350px}.sidebar{flex-direction:column}.monomer-palette,.legend-card{min-width:100%}.control-bar{flex-direction:column}.btn{width:100%}}:root{--lernkarte-primary: #f59e0b;--lernkarte-available: #3b82f6;--lernkarte-completed: #22c55e;--lernkarte-locked: #94a3b8}.lernkarte-app{max-width:1200px;margin:0 auto;padding:20px;min-height:100vh}.lernkarte-header{text-align:center;padding:20px;color:#fff}.lernkarte-header h1{font-size:2rem;font-weight:700;margin-bottom:8px;text-shadow:2px 2px 4px rgba(0,0,0,.2)}.lernkarte-subtitle{font-size:1.1rem;opacity:.9}.lernkarte-main{background:#fff;border-radius:16px;box-shadow:0 20px 40px #0003;padding:24px;min-height:500px}.progress-bar-container{margin-bottom:20px}.progress-bar-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.progress-bar-label{font-weight:600;color:#1e293b}.progress-bar-count{color:#64748b;font-size:.9rem}.progress-bar-track{height:12px;background:#e2e8f0;border-radius:6px;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--lernkarte-primary),#fbbf24);border-radius:6px;transition:width .5s ease}.concept-map-container{background:linear-gradient(135deg,#475569,#334155);border-radius:12px;padding:20px;min-height:400px;position:relative;overflow:hidden}.concept-map-svg{width:100%;height:400px}.topic-node{cursor:pointer}.topic-node--locked{cursor:not-allowed}.topic-node-circle{transition:all .2s ease}.topic-node:hover .topic-node-circle{filter:brightness(1.15);stroke:#fff;stroke-width:3}.topic-node-icon{font-size:28px;pointer-events:none}.topic-node-title{font-size:11px;font-weight:600;fill:#fff;pointer-events:none}.topic-node-status{font-size:16px;pointer-events:none}.connection-line{stroke:#cbd5e1;stroke-width:2;fill:none}.connection-line--bidirectional{stroke-dasharray:8 4}.connection-line--unlocks{stroke:#94a3b8;marker-end:url(#arrowhead)}.lernkarte-legend{display:flex;justify-content:center;gap:24px;margin-top:16px;padding-top:16px;border-top:1px solid #e2e8f0}.legend-item{display:flex;align-items:center;gap:8px;font-size:.9rem;color:#64748b}.legend-dot{width:16px;height:16px;border-radius:50%}.legend-dot--available{background:var(--lernkarte-available)}.legend-dot--completed{background:var(--lernkarte-completed)}.legend-dot--locked{background:var(--lernkarte-locked)}.topic-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.topic-modal{background:#fff;border-radius:16px;max-width:700px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 25px 50px #0000004d}.topic-modal-header{padding:24px;border-bottom:1px solid #e2e8f0;display:flex;align-items:center;gap:16px}.topic-modal-icon{font-size:48px}.topic-modal-title{flex:1}.topic-modal-title h2{font-size:1.5rem;color:#1e293b;margin:0 0 4px}.topic-modal-title p{color:#64748b;margin:0}.topic-modal-close{background:none;border:none;font-size:24px;cursor:pointer;color:#94a3b8;padding:8px;border-radius:8px;transition:all .2s}.topic-modal-close:hover{background:#f1f5f9;color:#1e293b}.topic-modal-content{padding:24px}.topic-description{font-size:1rem;color:#475569;line-height:1.6;margin-bottom:24px}.exercises-section{margin-top:24px}.exercises-section h3{font-size:1.1rem;color:#1e293b;margin-bottom:16px}.exercise-card{background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:16px;margin-bottom:12px;cursor:pointer;transition:all .2s}.exercise-card:hover{border-color:var(--lernkarte-primary);transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.exercise-card--completed{background:#f0fdf4;border-color:var(--lernkarte-completed)}.exercise-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.exercise-card-title{font-weight:600;color:#1e293b}.exercise-card-badge{padding:4px 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#0000001a}.dragdrop-item:active{cursor:grabbing}.dragdrop-item--dragging{opacity:.5}.dragdrop-targets{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}.dragdrop-target{background:#fff;border:2px solid #e2e8f0;border-radius:12px;padding:16px;min-height:150px;transition:all .2s}.dragdrop-target--dragover{border-color:var(--lernkarte-primary);background:#fffbeb}.dragdrop-target-title{font-weight:600;color:#1e293b;margin-bottom:12px;text-align:center;padding-bottom:8px;border-bottom:1px solid #e2e8f0}.dragdrop-target-items{display:flex;flex-direction:column;gap:8px}.dragdrop-placed-item{padding:8px 12px;background:#f0fdf4;border:1px solid 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auto;max-width:400px}.flashcard{position:relative;width:100%;height:250px;cursor:pointer;transform-style:preserve-3d;transition:transform .6s}.flashcard--flipped{transform:rotateY(180deg)}.flashcard-face{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;box-shadow:0 8px 24px #0000001a}.flashcard-front{background:linear-gradient(135deg,#3b82f6,#1d4ed8);color:#fff}.flashcard-back{background:#fff;border:2px solid #e2e8f0;transform:rotateY(180deg)}.flashcard-front h3{font-size:1.8rem;margin:0}.flashcard-front p{margin-top:16px;opacity:.8;font-size:.9rem}.flashcard-back p{color:#475569;font-size:1rem;line-height:1.6;text-align:center}.flashcard-navigation{display:flex;justify-content:center;align-items:center;gap:20px;margin-top:20px}.flashcard-nav-btn{padding:10px 20px;background:#f1f5f9;border:1px solid #e2e8f0;border-radius:8px;cursor:pointer;font-size:1rem;transition:all .2s}.flashcard-nav-btn:hover:not(:disabled){background:#e2e8f0}.flashcard-nav-btn:disabled{opacity:.5;cursor:not-allowed}.flashcard-counter{color:#64748b;font-size:.9rem}.flashcard-complete-btn{display:block;width:100%;max-width:300px;margin:20px auto 0;padding:14px;background:var(--lernkarte-completed);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s}.flashcard-complete-btn:hover{background:#16a34a}.quiz-exercise{padding:20px}.quiz-progress{text-align:center;color:#64748b;font-size:.9rem;margin-bottom:16px}.quiz-question{background:#f8fafc;border-radius:12px;padding:20px;margin-bottom:20px}.quiz-question h3{color:#1e293b;font-size:1.1rem;line-height:1.5;margin:0}.quiz-options{display:flex;flex-direction:column;gap:10px}.quiz-option{display:flex;align-items:center;gap:12px;padding:14px 16px;background:#fff;border:2px solid #e2e8f0;border-radius:10px;cursor:pointer;transition:all .2s;text-align:left;font-size:.95rem}.quiz-option:hover:not(:disabled){border-color:var(--lernkarte-primary);background:#fffbeb}.quiz-option--selected{border-color:var(--lernkarte-primary);background:#fef3c7}.quiz-option--correct{border-color:var(--lernkarte-completed);background:#dcfce7}.quiz-option--wrong{border-color:#ef4444;background:#fef2f2}.quiz-option-letter{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:#e2e8f0;border-radius:50%;font-weight:600;font-size:.85rem;flex-shrink:0}.quiz-option--selected .quiz-option-letter{background:var(--lernkarte-primary);color:#fff}.quiz-option--correct .quiz-option-letter{background:var(--lernkarte-completed);color:#fff}.quiz-option--wrong .quiz-option-letter{background:#ef4444;color:#fff}.quiz-option-text{flex:1}.quiz-feedback{text-align:center;padding:12px;border-radius:8px;margin-top:16px;font-weight:600}.quiz-feedback--correct{background:#dcfce7;color:#15803d}.quiz-feedback--wrong{background:#fef2f2;color:#dc2626}.quiz-buttons{margin-top:20px}.quiz-btn{padding:14px 24px;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s}.quiz-btn--primary{background:var(--lernkarte-primary);color:#fff;width:100%}.quiz-btn--primary:hover{background:#d97706}.quiz-btn--primary:disabled{background:#94a3b8;cursor:not-allowed}.quiz-result{text-align:center;padding:30px;border-radius:16px;margin-bottom:20px}.quiz-result--success{background:linear-gradient(135deg,#dcfce7,#bbf7d0)}.quiz-result--retry{background:linear-gradient(135deg,#fef3c7,#fde68a)}.quiz-result h3{font-size:1.5rem;margin:0 0 12px}.quiz-score{font-size:1.2rem;font-weight:600;margin-bottom:8px}.simulator-link-exercise{padding:20px}.simulator-link-card{background:linear-gradient(135deg,#1e3a5f,#4a3a6e);border-radius:16px;padding:30px;text-align:center;color:#fff}.simulator-link-icon{font-size:48px;margin-bottom:16px}.simulator-link-card h3{font-size:1.3rem;margin:0 0 12px}.simulator-link-card p{opacity:.9;margin-bottom:20px;line-height:1.5}.simulator-link-btn{display:inline-block;padding:14px 28px;background:var(--lernkarte-primary);color:#fff;text-decoration:none;border-radius:8px;font-weight:600;transition:all .2s}.simulator-link-btn:hover{background:#d97706;transform:translateY(-2px)}.simulator-link-confirm{margin-top:20px;padding:16px;background:#f8fafc;border-radius:12px;text-align:center}.simulator-link-confirm p{color:#64748b;margin-bottom:12px}.exercise-card-badge--simulator{background:#dbeafe;color:#1d4ed8}.lernkarte-footer{text-align:center;padding:20px;color:#ffffffb3;font-size:.9rem}@media (max-width: 768px){.lernkarte-app{padding:12px}.lernkarte-header h1{font-size:1.5rem}.lernkarte-legend{flex-wrap:wrap;gap:12px}.topic-modal{margin:10px;max-height:95vh}.dragdrop-targets{grid-template-columns:1fr}.flashcard{height:200px}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh}.back-button{position:fixed;top:16px;right:16px;z-index:1000;display:flex;align-items:center;gap:8px;padding:10px 16px;background:#fffffff2;border:none;border-radius:8px;font-size:.9rem;font-weight:600;color:#1e293b;cursor:pointer;box-shadow:0 2px 8px #00000026;transition:all .2s ease;text-decoration:none}.back-button:hover{background:#fff;transform:translateY(-2px);box-shadow:0 4px 12px #0003}.back-button span{font-size:1.1rem}