:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;background:#f0f2f5;color:#333;font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400}#root{max-width:800px;margin:0 auto;padding:2rem;text-align:center;width:100%}.container{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 4px 6px #0000001a;display:flex;flex-direction:column;align-items:center;gap:1.5rem}h1{font-size:2.2rem;line-height:1.1;color:#1a1a1a;margin-bottom:.5rem}h2{font-size:1.5rem;margin-bottom:1rem}p.description{color:#666;max-width:600px;margin-bottom:2rem}button{border-radius:8px;border:1px solid transparent;padding:.8em 1.5em;font-size:1em;font-weight:500;font-family:inherit;background-color:#007bff;color:#fff;cursor:pointer;transition:all .25s;width:100%;max-width:400px}button:hover{background-color:#0056b3}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;width:100%;max-width:600px}@media(max-width:600px){.options-grid{grid-template-columns:1fr}}.option-btn{background-color:#f8f9fa;color:#333;border:1px solid #ddd;text-align:left;display:flex;align-items:center;justify-content:center;min-height:60px;padding:10px}.option-btn:hover:not(:disabled){background-color:#e2e6ea;transform:translateY(-2px);box-shadow:0 2px 4px #0000001a}.option-btn.correct{background-color:#d4edda!important;border-color:#c3e6cb!important;color:#155724!important}.option-btn.wrong{background-color:#f8d7da!important;border-color:#f5c6cb!important;color:#721c24!important}.option-btn:disabled{cursor:default;opacity:.8}.grade-badge{font-size:3rem;font-weight:700;background:#f8f9fa;border-radius:50%;width:160px;height:160px;display:flex;align-items:center;justify-content:center;margin:1rem auto;border:4px solid #007bff;color:#007bff}.grade-1{border-color:#28a745;color:#28a745}.grade-2{border-color:#8bc34a;color:#8bc34a}.grade-3{border-color:#ffc107;color:#ffc107}.grade-4{border-color:#ff9800;color:#ff9800}.grade-5{border-color:#ff5722;color:#ff5722}.grade-6{border-color:#dc3545;color:#dc3545}.feedback-text{font-size:1.2rem;margin:1rem 0}.progress-text{color:#888;font-size:.9rem;margin-top:-1rem;margin-bottom:1rem}.chapter-list{display:flex;flex-direction:column;gap:1rem;width:100%;max-width:600px}.chapter-card{background:#f8f9fa;border:1px solid #ddd;padding:1.5rem;border-radius:8px;text-align:left;transition:transform .2s}.chapter-card:hover{transform:translateY(-2px);box-shadow:0 4px 6px #0000001a}.chapter-card h3{margin-top:0;color:#007bff}.chapter-card button{margin-top:1rem;width:auto}.option-btn.active{background-color:#cce5ff;border-color:#b8daff;font-weight:700}.grade-sehr-gut{background-color:#28a745;border-color:#1e7e34;color:#fff}.grade-gut{background-color:#8bc34a;border-color:#7cb342;color:#fff}.grade-befriedigend{background-color:#ffc107;border-color:#ffb300;color:#333}.grade-failed{background-color:#dc3545;border-color:#bd2130;color:#fff}.grade-badge{font-size:2rem;font-weight:700;border-radius:50%;width:140px;height:140px;display:flex;align-items:center;justify-content:center;margin:1rem auto;border:5px solid;text-align:center;padding:10px;line-height:1.2}.result-screen .percentage{font-size:1.5rem;font-weight:700}.status-indicator{font-size:.9rem;margin-top:.5rem;color:#555;font-weight:700}.status-done.grade-sehr-gut{border-left:5px solid #28a745}.status-done.grade-gut{border-left:5px solid #8bc34a}.status-done.grade-befriedigend{border-left:5px solid #ffc107}.status-done.grade-failed{border-left:5px solid #dc3545}.summary-row{display:flex;justify-content:space-between;border-bottom:1px solid #eee;padding:.5rem 0}.action-bar{margin-top:2rem;display:flex;justify-content:center;align-items:center;position:relative;min-height:50px}.btn-skip{position:absolute;left:0;font-size:.85rem;padding:.5em 1em;background-color:#6c757d;width:auto;border:none}.btn-skip:hover{background-color:#5a6268}.btn-send{width:auto;min-width:200px;font-size:1.1rem}@media(max-width:600px){.action-bar{flex-direction:column-reverse;gap:1.5rem;position:static}.btn-skip{position:static;width:100%;background-color:transparent;color:#6c757d;border:1px solid #ccc}.btn-send{width:100%}}.action-bar{margin-top:2rem;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;width:100%;gap:1rem}.btn-skip{justify-self:start;grid-column:1;position:static;font-size:.9rem;padding:.6em 1.2em;background-color:transparent;color:#6c757d;border:1px solid #ced4da;width:auto}.btn-skip:hover{background-color:#f8f9fa;color:#495057}.btn-send{grid-column:2;width:auto;min-width:180px;font-size:1.1rem}@media(max-width:600px){.action-bar{display:flex;flex-direction:column-reverse;gap:1rem}.btn-skip{width:100%;border:none;color:#6c757d;text-decoration:underline}.btn-send{width:100%}}.global-logout-btn{position:fixed;top:1rem;right:1rem;width:auto;padding:.5rem 1rem;font-size:.9rem;background-color:#dc3545;color:#fff;border:none;border-radius:4px;z-index:1000;box-shadow:0 2px 4px #0003}.global-logout-btn:hover{background-color:#c82333}.status-progress{border-left:5px solid #17a2b8}