:root{--navy: #0F172A;--primary: #2563EB;--primary-dark:#1A4FD0;--accent: #FFC700;--accent-dark: #E6B200;--light-blue: #DBEAFE;--slate: #64748B;--bg: #F8FAFF;--card: #FFFFFF;--text: #0F172A;--subtext: #64748B;--border: #DBEAFE;--neutral: #64748B;--correct: #16a34a;--correct-bg: #dcfce7;--wrong: #dc2626;--wrong-bg: #fee2e2}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;padding:24px 16px;display:flex;flex-direction:column}.hidden{display:none!important}#login-screen,#start-screen,#quiz-screen,#browse-screen,#results-screen,#stats-screen,#fehlerPool-screen{flex:1}.container{max-width:760px;margin:0 auto}header{text-align:center;margin-bottom:28px}header h1{font-size:1.7rem;font-weight:700;color:var(--navy)}header p{color:var(--subtext);margin-top:4px;font-size:.95rem}.progress-bar-wrap{background:var(--border);border-radius:99px;height:8px;margin-bottom:20px;overflow:hidden}.progress-bar{height:100%;background:var(--primary);border-radius:99px;transition:width .3s ease}.progress-text{text-align:right;font-size:.85rem;color:var(--subtext);margin-bottom:16px}.card{background:var(--card);border-radius:12px;padding:28px 28px 24px;box-shadow:0 1px 3px #00000014,0 4px 16px #0000000a;margin-bottom:20px}.question-text{font-size:1.08rem;font-weight:600;line-height:1.55;margin-bottom:20px;white-space:pre-wrap}.multi-hint{font-size:.82rem;font-weight:400;color:var(--primary);background:#eff6ff;border-radius:4px;padding:2px 8px;margin-left:8px;vertical-align:middle}.options{display:flex;flex-direction:column;gap:10px}.option{display:flex;align-items:flex-start;gap:12px;padding:12px 16px;border:2px solid var(--border);border-radius:8px;cursor:pointer;transition:border-color .15s,background .15s;-webkit-user-select:none;user-select:none}.option:hover:not(.disabled){border-color:var(--primary);background:#eff6ff}.option.selected{border-color:var(--primary);background:#eff6ff}.option.correct{border-color:var(--correct);background:var(--correct-bg)}.option.wrong{border-color:var(--wrong);background:var(--wrong-bg)}.option.missed{border-color:var(--correct);background:var(--correct-bg);opacity:.75}.option.disabled{cursor:default}.letter-badge{min-width:28px;height:28px;border-radius:50%;background:var(--border);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;flex-shrink:0;margin-top:1px;transition:background .15s}.option.selected .letter-badge{background:var(--primary);color:#fff}.option.correct .letter-badge{background:var(--correct);color:#fff}.option.wrong .letter-badge{background:var(--wrong);color:#fff}.option.missed .letter-badge{background:var(--correct);color:#fff}.option-text{font-size:.97rem;line-height:1.5}.feedback{margin-top:16px;padding:12px 16px;border-radius:8px;font-size:.92rem;display:none}.feedback.show{display:block}.feedback.correct-fb{background:var(--correct-bg);color:var(--correct);border:1px solid #bbf7d0}.feedback.wrong-fb{background:var(--wrong-bg);color:var(--wrong);border:1px solid #fecaca}.explanation{margin-top:10px;padding:10px 14px;border-radius:6px;background:#f8fafc;border:1px solid var(--border);font-size:.9rem;color:var(--text);line-height:1.55}.explanation-label{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--subtext);margin-bottom:4px}.btn-row{display:flex;gap:12px;justify-content:flex-end;margin-top:20px;flex-wrap:wrap}button{padding:10px 24px;border-radius:8px;border:none;font-size:.97rem;font-weight:600;cursor:pointer;transition:background .15s,transform .1s}button:active{transform:scale(.97)}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{background:var(--light-blue);color:var(--navy)}.btn-secondary:hover{background:#bfdbfe}.btn-cta{background:var(--accent);color:var(--navy);font-weight:700}.btn-cta:hover{background:var(--accent-dark)}button:disabled{opacity:.4;cursor:not-allowed;transform:none}.results{text-align:center}.score-circle{width:140px;height:140px;border-radius:50%;border:8px solid var(--primary);display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 auto 24px}.score-num{font-size:2.4rem;font-weight:800;color:var(--primary);line-height:1}.score-label{font-size:.82rem;color:var(--subtext)}.score-pct{font-size:1.3rem;font-weight:700;margin-bottom:6px}.score-msg{color:var(--subtext);margin-bottom:28px}.review-tabs{display:none;margin-top:28px;text-align:left}.review-tabs.show{display:block}.tab-bar{display:flex;gap:2px;border-bottom:2px solid var(--border);margin-bottom:20px}.tab-btn{padding:9px 20px;border:none;background:none;font-size:.9rem;font-weight:600;color:var(--subtext);cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-2px;border-radius:0;transition:color .15s}.tab-btn:hover{color:var(--text)}.tab-btn:active{transform:none}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}.tab-content{display:none}.tab-content.active{display:block}.review-card{background:#fff;border:1px solid var(--border);border-radius:10px;padding:20px 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.card{padding:40px}.big-title{font-size:2rem;font-weight:800;color:var(--navy);margin-bottom:8px}.tagline{color:var(--subtext);margin-bottom:28px;font-size:1rem}.stats{display:flex;gap:24px;justify-content:center;margin-bottom:32px;flex-wrap:wrap}.stat{text-align:center}.stat-num{font-size:1.8rem;font-weight:800;color:var(--primary)}.stat-label{font-size:.82rem;color:var(--subtext)}.count-row{margin:22px 0 20px;text-align:center}.count-label{display:block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--subtext);margin-bottom:10px}.count-input-row{display:flex;align-items:center;justify-content:center;gap:10px}.count-big{width:88px;padding:10px;border:2px solid var(--border);border-radius:8px;font-size:1.4rem;font-weight:700;text-align:center;color:var(--text);background:#fff;outline:none;transition:border-color 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16px}.cat-check-item{display:flex;align-items:center;gap:8px;padding:5px 6px;border-radius:6px;cursor:pointer;transition:background .1s;font-size:.88rem;color:var(--text)}.cat-check-item:hover{background:#e8edf2}.cat-check-item input[type=checkbox]{width:15px;height:15px;accent-color:var(--primary);cursor:pointer;flex-shrink:0}.cat-count{font-size:.75rem;color:var(--subtext)}.range-inputs{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}.range-field{display:flex;flex-direction:column;align-items:center;gap:5px}.range-field label{font-size:.75rem;color:var(--subtext);font-weight:700;text-transform:uppercase;letter-spacing:.05em}.range-field input{width:80px;padding:8px;border:2px solid var(--border);border-radius:6px;font-size:1.05rem;text-align:center;color:var(--text);background:#fff;outline:none;transition:border-color .15s}.range-field input:focus{border-color:var(--primary)}.range-field 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a:hover{text-decoration:underline}.error-msg{color:var(--wrong);font-size:.875rem;margin-top:8px;min-height:20px}.success-msg{color:var(--correct);font-size:.875rem;margin-top:8px;min-height:20px}.guest-divider{display:flex;align-items:center;gap:12px;margin:20px 0 12px;color:var(--subtext);font-size:.85rem}.guest-divider:before,.guest-divider:after{content:"";flex:1;height:1px;background:var(--border)}.stats-screen-inner{max-width:760px;margin:0 auto}.stats-card-header{display:flex;align-items:center;gap:14px;margin-bottom:18px}.stats-card-header h2{font-size:1.1rem;font-weight:700;flex:1}.stats-total-label{font-size:.85rem;color:var(--subtext);margin-bottom:16px}.stats-row{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--border);font-size:.87rem}.stats-row:last-child{border-bottom:none}.stats-cat{flex:2}.stats-bar-wrap{flex:3;height:8px;background:var(--border);border-radius:4px;overflow:hidden}.stats-bar{height:100%;border-radius:4px;background:var(--primary)}.stats-pct{font-weight:700;min-width:42px;text-align:right}.stats-count{font-size:.75rem;color:var(--subtext);min-width:52px;text-align:right}.stats-hint{font-size:.87rem;color:var(--subtext);font-style:italic}.stats-empty{text-align:center;color:var(--subtext);padding:32px 0;font-size:.95rem}.fp-toolbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border)}.fp-total{font-size:.9rem;color:var(--subtext);font-weight:500}.fp-toolbar-actions{display:flex;align-items:center;gap:8px}.fp-link-btn{background:none;border:none;color:var(--primary);font-size:.85rem;font-weight:600;cursor:pointer;padding:2px 4px;border-radius:4px}.fp-link-btn:hover{background:var(--light-blue);transform:none}.fp-cat-block{margin-bottom:16px;border:1px solid var(--border);border-radius:10px;overflow:hidden}.fp-cat-header{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--light-blue);cursor:pointer;-webkit-user-select:none;user-select:none}.fp-cat-header label{display:flex;align-items:center;gap:8px;cursor:pointer;flex:1;font-weight:700;font-size:.92rem;color:var(--navy)}.fp-cat-count{font-size:.8rem;color:var(--slate);font-weight:400;margin-left:auto}.fp-cat-chevron{font-size:.65rem;color:var(--slate);transition:transform .2s}.fp-cat-chevron.open{transform:rotate(180deg)}.fp-question-list{padding:4px 0}.fp-question-item{display:flex;align-items:flex-start;gap:10px;padding:9px 14px;border-top:1px solid var(--border);cursor:pointer;transition:background .1s}.fp-question-item:hover{background:#f8faff}.fp-question-item 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0;cursor:pointer;-webkit-user-select:none;user-select:none}.cat-group-header.collapsed{border-radius:8px}.cat-group-name{font-weight:700;font-size:.97rem}.cat-group-meta{display:flex;align-items:center;gap:10px}.cat-group-score{font-size:.88rem;font-weight:700}.cat-group-bar-wrap{width:80px;height:7px;background:var(--border);border-radius:4px;overflow:hidden}.cat-group-bar{height:100%;border-radius:4px}.cat-group-chevron{font-size:.65rem;color:var(--subtext);transition:transform .2s;margin-left:6px}.cat-group-chevron.open{transform:rotate(180deg)}.cat-group-body{border:1px solid var(--border);border-top:none;border-radius:0 0 8px 8px;overflow:hidden}.cat-group-body.hidden{display:none}.app-footer{text-align:center;padding:20px 16px 28px;background:var(--navy);margin:8px -16px -24px;border-radius:0}.footer-nav{display:flex;justify-content:center;gap:24px;flex-wrap:wrap}.footer-link{background:none;border:none;color:#94a3b8;font-size:.82rem;padding:4px 0;cursor:pointer;font-weight:400;text-decoration:underline;text-underline-offset:3px;border-radius:0}.footer-link:hover{color:#fff;transform:none}.footer-link:active{transform:none}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:flex;align-items:center;justify-content:center;padding:16px;z-index:1000}.modal-card{background:#fff;border-radius:14px;max-width:560px;width:100%;max-height:85vh;display:flex;flex-direction:column;box-shadow:0 8px 40px #0000002e}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px 16px;border-bottom:1px solid var(--border)}.modal-header h2{font-size:1.15rem;font-weight:700}.modal-close{background:none;border:none;font-size:1rem;color:var(--subtext);cursor:pointer;padding:4px 8px;border-radius:6px;line-height:1}.modal-close:hover{background:var(--border);color:var(--text);transform:none}.modal-close:active{transform:none}.account-info{background:var(--light-blue);border-radius:10px;padding:16px 20px;margin-bottom:24px}.account-row{display:flex;justify-content:space-between;align-items:center;padding:6px 0;border-bottom:1px solid #c7d9fd}.account-row:last-child{border-bottom:none}.account-label{font-size:.85rem;color:var(--slate);font-weight:500}.account-value{font-size:.9rem;font-weight:600;color:var(--navy)}.account-danger-zone{border:1.5px solid #fca5a5;border-radius:10px;padding:16px 20px;background:#fff5f5}.account-danger-zone h3{font-size:.9rem;font-weight:700;color:var(--wrong);margin-bottom:8px;text-transform:uppercase;letter-spacing:.05em}.account-danger-zone p{font-size:.88rem;color:#7f1d1d;margin-bottom:16px;line-height:1.5}.btn-danger{width:100%;padding:10px 16px;background:var(--wrong);color:#fff;border:none;border-radius:8px;font-size:.9rem;font-weight:700;cursor:pointer;transition:background .15s}.btn-danger:hover{background:#b91c1c}.modal-body{padding:20px 24px 24px;overflow-y:auto;font-size:.92rem;line-height:1.65;color:var(--text)}.modal-body h3{font-size:.88rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--subtext);margin:18px 0 6px}.modal-body h3:first-child{margin-top:0}.modal-body p{margin-bottom:8px}.guest-banner{background:#eff6ff;border:1px solid #bfdbfe;border-radius:8px;padding:10px 14px;font-size:.85rem;color:#1e40af;margin-bottom:16px}