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h3{font-size:1.75rem;margin-bottom:2rem;text-align:center;color:var(--text-primary)}.included-list{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}.included-item{display:flex;align-items:flex-start;gap:1rem;font-size:1.1rem;color:var(--text-primary)}.check-icon{color:var(--accent-success);font-weight:700;font-size:1.25rem;flex-shrink:0}.preview-note{display:inline-flex;align-items:center;gap:1rem;padding:1.25rem 2.5rem;border-radius:100px;font-size:1rem;color:var(--text-primary)}.unlocked-content{max-width:1200px;margin:0 auto;padding:2rem}.access-badge{display:inline-block;background:linear-gradient(135deg,var(--accent-success),#2ecc71);color:#fff;padding:.5rem 1.5rem;border-radius:100px;font-family:var(--font-mono);font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;margin-bottom:3rem}.browse-container{max-width:1000px;margin:0 auto;padding-bottom:5rem}.progress-header{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:24px;padding:2.5rem;margin-bottom:3rem;display:flex;align-items:center;gap:3rem;position:relative;overflow:hidden}.progress-info{flex:1}.progress-info h3{font-size:1.5rem;margin-bottom:1rem;color:var(--text-primary)}.progress-bar-outer{height:12px;background:var(--bg-primary);border-radius:100px;overflow:hidden;margin:1.5rem 0 .5rem}.progress-bar-inner{height:100%;background:linear-gradient(90deg,var(--accent-primary),var(--accent-gold));border-radius:100px;transition:width 1s ease-out}.progress-stats-row{display:flex;justify-content:space-between;font-family:var(--font-mono);font-size:.9rem;color:var(--text-secondary)}.filter-bar{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:3rem;background:var(--bg-secondary);padding:1rem;border-radius:16px;border:1px solid var(--border-color)}.filter-group{display:flex;align-items:center;gap:.75rem;flex:1;min-width:200px}.filter-label{font-size:.8rem;font-family:var(--font-mono);text-transform:uppercase;color:var(--text-muted)}.filter-select{flex:1;padding:.75rem;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:8px;color:var(--text-primary);font-family:var(--font-body);font-size:.95rem;outline:none;cursor:pointer}.filter-select:focus{border-color:var(--accent-primary)}.filter-checkbox-label{display:flex;align-items:center;gap:.5rem;font-size:.9rem;color:var(--text-primary);cursor:pointer;-webkit-user-select:none;user-select:none}.filter-checkbox-label input{width:auto;margin:0}.reset-filters{padding:.75rem 1.5rem;background:transparent;border:1px solid var(--border-color);border-radius:8px;color:var(--text-secondary);font-family:var(--font-mono);font-size:.85rem;cursor:pointer;transition:all .2s}.reset-filters:hover{color:var(--accent-primary);border-color:var(--accent-primary)}.topics-list{display:flex;flex-direction:column;gap:2rem}.topic-section{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;overflow:hidden}.topic-header{padding:1.5rem 2rem;display:flex;justify-content:space-between;align-items:center;background:#9b7dd40d;border-bottom:1px solid var(--border-color);cursor:pointer;transition:background .2s}.topic-header:hover{background:#9b7dd41a}.topic-title-group{display:flex;align-items:center;gap:1.5rem}.topic-icon{font-size:1.8rem}.topic-name{font-size:1.4rem;font-weight:700;color:var(--text-primary)}.topic-meta{display:flex;align-items:center;gap:1.5rem}.topic-progress-text{font-family:var(--font-mono);font-size:.85rem;color:var(--text-secondary)}.topic-content{padding:2rem}.subtopics-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.25rem}.subtopic-card{background:var(--bg-primary);border:1px 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var(--border-color);display:flex;justify-content:space-between;align-items:center}.preview-q-text{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-right:2rem;color:var(--text-primary);font-weight:500}.preview-actions{display:flex;justify-content:space-between;margin-top:3rem}.btn-start-random{position:fixed;bottom:2rem;right:2rem;padding:1rem 2rem;background:var(--accent-primary);color:#fff;border-radius:100px;font-weight:700;box-shadow:0 10px 30px #9b7dd466;display:flex;align-items:center;gap:1rem;border:none;cursor:pointer;transition:all .3s;z-index:100}.btn-start-random:hover{transform:scale(1.05) translateY(-5px);box-shadow:0 15px 40px #9b7dd499}.ready-screen{display:flex;align-items:center;justify-content:center;min-height:60vh;padding:2rem}.ready-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:32px;padding:3.5rem 4rem;text-align:center;max-width:520px;width:100%;box-shadow:0 20px 60px #00000026;animation:fadeInUp .5s ease-out}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.ready-title{font-size:2.2rem;font-weight:800;color:var(--text-primary);margin-bottom:2.5rem;letter-spacing:-.02em}.ready-stats{display:flex;align-items:center;justify-content:center;gap:1.5rem;padding:2rem;background:var(--bg-primary);border-radius:20px;margin-bottom:2rem}.ready-stat{display:flex;flex-direction:column;align-items:center;gap:.5rem}.ready-stat .stat-value{font-size:1.8rem;font-weight:800;color:var(--accent-primary);line-height:1}.ready-stat .stat-label{font-size:.75rem;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted)}.ready-divider{width:1px;height:40px;background:var(--border-color)}.timer-toggle{display:flex;gap:.75rem;justify-content:center;margin-bottom:2rem}.toggle-btn{padding:.85rem 1.75rem;border-radius:100px;border:2px solid var(--border-color);background:transparent;color:var(--text-secondary);font-weight:600;font-size:.95rem;cursor:pointer;transition:all .25s ease}.toggle-btn:hover{border-color:var(--accent-primary);color:var(--accent-primary)}.toggle-btn.active{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff;box-shadow:0 4px 20px #9b7dd466}.start-btn-big{width:100%;padding:1.25rem 2rem;background:linear-gradient(135deg,var(--accent-primary),#7c5fc2);border:none;border-radius:16px;color:#fff;font-size:1.2rem;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:1rem;transition:all .3s ease;box-shadow:0 8px 30px #9b7dd466}.start-btn-big:hover{transform:translateY(-3px);box-shadow:0 12px 40px #9b7dd499}.start-btn-big:active{transform:translateY(0)}.start-arrow{font-size:1.4rem;transition:transform .3s ease}.start-btn-big:hover .start-arrow{transform:translate(5px)}.back-link-subtle{display:inline-block;margin-top:1.5rem;padding:.75rem 1.5rem;background:transparent;border:none;color:var(--text-muted);font-size:.9rem;font-family:var(--font-mono);cursor:pointer;transition:color .2s ease}.back-link-subtle:hover{color:var(--accent-primary)}@media(max-width:600px){.ready-card{padding:2.5rem 1.5rem}.ready-stats{flex-direction:column;gap:1.5rem}.ready-divider{width:60px;height:1px}.timer-toggle{flex-direction:column}.toggle-btn{width:100%}}.result-header h1{font-size:clamp(2rem,5vw,3rem)}.score-summary-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin:3rem 0}.score-card{background:var(--bg-secondary);padding:2.5rem;border-radius:24px;text-align:center;border:1px solid var(--border-color)}.score-total{font-size:2rem;color:var(--text-muted)}.score-label{margin-top:1rem;font-size:1.2rem;font-weight:700;color:var(--text-primary)}.stat-box{background:var(--bg-secondary);padding:1.5rem;border-radius:16px;display:flex;justify-content:space-between;align-items:center;border:1px solid var(--border-color)}.stat-val{font-size:2rem;font-weight:800;color:var(--text-primary)}.stat-name{color:var(--text-secondary);font-family:var(--font-mono);font-size:.8rem;text-transform:uppercase}.solutions-section{margin-top:4rem}.solution-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;margin-bottom:2rem;overflow:hidden;transition:all .3s ease}.solution-card.correct{border-left:8px solid #2ecc71}.solution-card.incorrect{border-left:8px solid #e74c3c}.solution-card.unattempted{border-left:8px solid #95a5a6}.solution-header{padding:1.5rem 2rem;display:flex;align-items:center;gap:1.5rem}.solution-status{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.2rem;color:#fff}.correct .solution-status{background:#2ecc71}.incorrect .solution-status{background:#e74c3c}.unattempted .solution-status{background:#95a5a6}.solution-body{padding:0 2rem 2rem}.answer-summary{background:var(--bg-primary);padding:1.5rem;border-radius:12px;margin-bottom:2rem}.btn-hint-toggle{display:flex;align-items:center;gap:.75rem;padding:.75rem 1.5rem;background:#9b7dd41a;border:1px solid var(--accent-primary);border-radius:100px;color:var(--accent-primary);font-weight:700;cursor:pointer;transition:all .2s;margin:1rem 0}.btn-hint-toggle:hover{background:var(--accent-primary);color:#fff}.hint-content{background:var(--bg-primary);padding:2rem;border-radius:16px;border:1px dashed var(--accent-primary);margin-top:1.5rem;animation:slideDown .3s ease-out}.hint-content p{margin-bottom:1rem;line-height:1.7}.hint-content ul{list-style:none;padding:0;margin-top:1.5rem}.hint-content li{padding:.75rem 0 .75rem 2rem;position:relative;border-top:1px solid var(--border-color)}.hint-content li:before{content:"⚡";position:absolute;left:0}.modal-overlay{position:fixed;inset:0;background:#000c;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:3000}.modal{background:var(--bg-secondary);padding:3rem;border-radius:32px;max-width:500px;width:90%;border:1px solid var(--border-color);text-align:center}.modal h3{font-size:2rem;margin-bottom:1rem}.modal input{width:100%;padding:1rem 1.5rem;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:12px;margin-bottom:1.5rem;color:var(--text-primary);font-size:1.1rem}@media(max-width:992px){.included-list{grid-template-columns:1fr}.pricing-card{padding:3rem 2rem}}@media(max-width:768px){.page-header h1{font-size:2.5rem}.price-tag-large{font-size:3.5rem}.locked-content h2{font-size:2rem}.progress-header{flex-direction:column;gap:2rem;text-align:center}.filter-group{min-width:100%}}.notes-page{min-height:100vh;padding-top:var(--navbar-height);background-color:var(--bg-primary);position:relative;overflow-x:hidden;transition:background-color var(--transition-base)}.notes-page.quiz-mode{padding-top:0}.notes-page .container{max-width:1200px;margin:0 auto;padding:0 1.5rem;position:relative;z-index:2}.page-header{text-align:center;padding:4rem 0 3rem}.page-header h1{font-size:clamp(2.5rem,6vw,4rem);margin-bottom:1rem;color:var(--text-primary)}.page-header p{font-size:1.15rem;color:var(--text-secondary);font-style:italic}.config-container{max-width:700px;margin:0 auto;padding-bottom:4rem}.config-section{padding:2.5rem;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:24px;margin-bottom:2rem}.section-header{display:flex;align-items:center;gap:1rem;margin-bottom:2rem}.section-icon{font-size:1.5rem;color:var(--accent-gold)}.config-section h3{font-size:1.5rem;color:var(--text-primary);margin:0}.upload-zone{border:2px dashed var(--border-color);border-radius:20px;padding:4rem 2rem;text-align:center;cursor:pointer;transition:all var(--transition-base);background:var(--bg-primary)}.upload-zone:hover{border-color:var(--accent-primary);background:#9b7dd40d;transform:translateY(-4px)}.upload-icon{font-size:3rem;margin-bottom:1.5rem;color:var(--accent-primary)}.upload-text{font-size:1.25rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.upload-hint{font-size:.9rem;color:var(--text-secondary)}.notes-textarea{width:100%;padding:1.5rem;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:16px;font-family:var(--font-body);font-size:1.1rem;color:var(--text-primary);resize:vertical;min-height:180px;outline:none;transition:border-color var(--transition-fast)}.notes-textarea:focus{border-color:var(--accent-primary)}.option-buttons{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1rem}.option-btn{padding:1rem;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:12px;font-family:var(--font-mono);font-size:.9rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;cursor:pointer;transition:all var(--transition-fast)}.option-btn:hover{border-color:var(--accent-primary);color:var(--accent-primary)}.option-btn.active{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff;box-shadow:0 8px 16px var(--shadow-color)}.loading-container{max-width:600px;margin:0 auto;text-align:center;padding:8rem 2rem}.loading-spinner{width:80px;height:80px;border:4px solid var(--bg-secondary);border-top:4px solid var(--accent-primary);border-radius:50%;margin:0 auto 3rem;animation:spin 1s linear infinite}.progress-bar-container{width:100%;height:6px;background:var(--bg-secondary);border-radius:100px;margin:2rem 0 1rem;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent-primary),var(--accent-gold));width:100%;animation:progressFlow 10s ease-in-out infinite}.loading-subtext{font-style:italic;color:var(--text-secondary);font-size:1rem}@keyframes progressFlow{0%{transform:translate(-100%)}50%{transform:translate(0)}to{transform:translate(100%)}}@keyframes spin{to{transform:rotate(360deg)}}.result-container{max-width:900px;margin:0 auto;padding-bottom:6rem}.result-header{text-align:center;margin-bottom:4rem}.result-header h1{font-size:3rem;margin-bottom:.5rem}.score-summary-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin-bottom:3rem}.score-card.main-score{background:var(--bg-secondary);padding:3rem;border-radius:32px;text-align:center;border:1px solid var(--border-color)}.score-circle{display:flex;align-items:baseline;justify-content:center;gap:.5rem;margin-bottom:1rem}.score-number{font-size:5rem;font-weight:800;color:var(--accent-primary);line-height:1}.score-total{font-size:2rem;color:var(--text-secondary)}.score-label{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.quick-stats{display:flex;flex-direction:column;gap:1rem}.stat-box{background:var(--bg-secondary);padding:1.5rem;border-radius:20px;display:flex;justify-content:space-between;align-items:center;border:1px solid var(--border-color)}.stat-val{font-size:2rem;font-weight:800}.stat-name{color:var(--text-secondary);text-transform:uppercase;font-size:.8rem;letter-spacing:.1em}.analysis-breakdown{margin-bottom:4rem}.insights-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem}.insight-card{background:#9b7dd40d;padding:1.5rem;border-radius:16px;display:flex;align-items:center;gap:1rem;border:1px solid rgba(155,125,212,.1)}.insight-icon{font-size:1.5rem}.solutions-section h3{margin-bottom:2rem;font-size:1.75rem}.solution-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;margin-bottom:1.5rem;overflow:hidden;transition:all var(--transition-base)}.solution-card.correct{border-left:6px solid #4CAF50}.solution-card.incorrect{border-left:6px solid #FF5252}.solution-card.unattempted{border-left:6px solid #9E9E9E}.solution-header{padding:1.5rem 2rem;display:flex;align-items:center;gap:1.5rem;cursor:pointer}.solution-status{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:900}.correct .solution-status{background:#4caf50;color:#fff}.incorrect .solution-status{background:#ff5252;color:#fff}.unattempted .solution-status{background:#9e9e9e;color:#fff}.solution-info{flex:1}.solution-meta{display:flex;gap:.5rem;margin-bottom:.5rem}.tag-pill{font-size:.65rem;padding:.2rem .6rem;border-radius:100px;text-transform:uppercase;font-weight:700}.source-tag{background:var(--bg-primary);color:var(--accent-gold)}.diff-tag{background:var(--bg-primary);color:var(--text-secondary)}.rel-tag{background:var(--accent-primary);color:#fff}.solution-q-text{font-weight:500;color:var(--text-primary)}.solution-toggle{font-size:.8rem;color:var(--accent-primary);font-weight:600}.solution-body{padding:2rem;background:var(--bg-primary);border-top:1px solid var(--border-color)}.q-content-box{margin-bottom:2rem;padding:1.5rem;background:var(--bg-secondary);border-radius:12px}.option-review{padding:1rem 1.5rem;border:1px solid var(--border-color);border-radius:12px;margin-bottom:.75rem;position:relative;display:flex;justify-content:space-between;align-items:center}.correct-option{background:#4caf501a;border-color:#4caf50}.wrong-option{background:#ff52521a;border-color:#ff5252}.selection-badge,.correct-badge{font-size:.6rem;text-transform:uppercase;font-weight:800;padding:.2rem .5rem;border-radius:4px}.selection-badge{background:#ff5252;color:#fff}.correct-badge{background:#4caf50;color:#fff}.answer-summary{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:2rem 0}.answer-item{padding:1.5rem;border-radius:16px;display:flex;flex-direction:column;gap:.5rem}.answer-item span{font-size:.8rem;color:var(--text-secondary)}.answer-item strong{font-size:1.5rem}.answer-item.correct{background:#4caf500d;color:#4caf50}.answer-item.incorrect{background:#ff52520d;color:#ff5252}.solution-explanation{background:var(--bg-secondary);padding:2rem;border-radius:20px}.explanation-header{font-weight:800;margin-bottom:1rem;color:var(--accent-gold)}.result-actions{display:flex;justify-content:center;gap:1.5rem}@media(max-width:768px){.score-summary-grid,.answer-summary{grid-template-columns:1fr}}:root{--cat-blue: #4a86e8;--cat-blue-dark: #3c6dbb;--cat-red: #ff0000;--cat-bg: #f5f7f9;--cat-border: #d1d9e0;--cat-status-answered: #28a745;--cat-status-not-answered: #dc3545;--cat-status-not-visited: #7e8c9a;--cat-status-marked: #6f42c1}.cat-quiz-container{display:flex!important;flex-direction:column!important;height:100vh!important;background-color:var(--cat-bg)!important;color:#333!important;font-family:Inter,system-ui,-apple-system,sans-serif!important;position:fixed!important;inset:0!important;z-index:1000!important}.cat-header{height:45px!important;background-color:var(--cat-blue)!important;display:flex!important;justify-content:space-between!important;align-items:center!important;padding:0 10px!important;flex-shrink:0!important}.cat-section-tabs{display:flex!important;height:100%!important}.section-tab{background:#1a4d8c!important;color:#fff!important;border:none!important;padding:0 25px!important;font-weight:600!important;font-size:.9rem!important;cursor:pointer!important;height:35px!important;align-self:center!important;border-radius:4px!important;margin-left:5px!important}.cat-timer{background:#fff!important;padding:5px 15px!important;border-radius:4px!important;display:flex!important;align-items:center!important;gap:10px!important;height:35px!important}.timer-label{color:#555!important;font-size:.9rem!important}.timer-value{color:#c00!important;font-weight:700!important;font-size:1.2rem!important;font-family:monospace!important}.timer-value.warning{animation:cat-pulse 1s infinite!important}.cat-question-info{background-color:#e8f1f8!important;border-bottom:1px solid var(--cat-border)!important;padding:8px 20px!important;display:flex!important;gap:30px!important;flex-shrink:0!important}.question-type,.question-marks{color:var(--cat-red)!important;font-weight:600!important;font-size:.85rem!important}.cat-body{display:grid!important;grid-template-columns:1fr 300px!important;flex:1!important;overflow:hidden!important}.cat-question-panel{background:#fff!important;display:flex!important;flex-direction:column!important;overflow-y:auto!important;border-right:1px solid var(--cat-border)!important;padding:25px!important}.question-number{font-size:1.1rem!important;font-weight:700!important;margin-bottom:20px!important;color:#222!important}.question-text{font-size:1.05rem!important;line-height:1.6!important;margin-bottom:25px!important;padding:20px!important;border:1px solid #eee!important;background:#fafafa!important;border-radius:6px!important;white-space:pre-wrap!important}.question-header-row{display:flex!important;justify-content:space-between!important;align-items:center!important;margin-bottom:20px!important}.question-actions{display:flex!important;align-items:center!important;gap:15px!important}.bookmark-btn{background:none!important;border:1px solid var(--cat-border)!important;padding:5px 12px!important;border-radius:4px!important;font-size:.85rem!important;font-weight:600!important;color:#666!important;cursor:pointer!important;transition:all .2s!important}.bookmark-btn:hover{background-color:#f8f9fa!important;border-color:var(--cat-blue)!important;color:var(--cat-blue)!important}.bookmark-btn.active{background-color:#fff9e6!important;border-color:#f39c12!important;color:#f39c12!important}.question-counter{font-family:monospace!important;font-weight:700!important;background:#eee!important;padding:2px 8px!important;border-radius:4px!important;font-size:.9rem!important}.options-list{display:flex!important;flex-direction:column!important;gap:12px!important}.quiz-option{display:flex!important;align-items:center!important;padding:12px 15px!important;border:1px solid #e0e0e0!important;border-radius:6px!important;background:#fff!important;cursor:pointer!important;transition:all .2s!important;text-align:left!important;width:100%!important}.quiz-option:hover{background-color:#f0f7ff!important;border-color:#bed6f3!important}.quiz-option.selected{background-color:#eaf1fb!important;border-color:var(--cat-blue)!important;position:relative!important;padding-left:20px!important}.quiz-option.selected:before{content:""!important;position:absolute!important;left:0!important;top:0!important;bottom:0!important;width:5px!important;background:var(--cat-blue)!important;border-radius:6px 0 0 6px!important}.option-radio{margin-right:15px!important;font-size:1.2rem!important;color:var(--cat-blue)!important}.option-text{font-size:1rem!important;color:#444!important}.tita-section{max-width:400px!important}.tita-input-display{height:50px!important;border:2px solid var(--cat-blue)!important;background:#fff!important;display:flex!important;align-items:center!important;padding:0 15px!important;font-size:1.5rem!important;font-weight:600!important;margin-bottom:20px!important;border-radius:4px!important}.tita-cursor{color:var(--cat-blue)!important;animation:cat-blink 1s infinite!important}.number-pad{display:flex!important;flex-direction:column!important;gap:5px!important}.numpad-grid{display:grid!important;grid-template-columns:repeat(3,1fr)!important;gap:5px!important}.numpad-btn{height:45px!important;background:#fff!important;border:1px solid #ccc!important;border-radius:4px!important;font-size:1.1rem!important;font-weight:600!important;cursor:pointer!important;transition:background .2s!important}.numpad-btn:hover{background:#f0f0f0!important}.numpad-btn.backspace,.numpad-btn.clear-all{width:100%!important}.cat-controls{margin-top:auto!important;padding-top:30px!important;display:flex!important;justify-content:space-between!important;border-top:1px solid #eee!important}.controls-left,.controls-right{display:flex!important;gap:15px!important;flex:1!important}.controls-center{display:flex!important;gap:15px!important;justify-content:center!important;flex:2!important}.controls-right{justify-content:flex-end!important}.cat-btn{padding:10px 20px!important;border-radius:4px!important;font-weight:600!important;font-size:.9rem!important;cursor:pointer!important;transition:all .2s!important;border:1px solid transparent!important}.cat-btn.mark-review{background-color:#5b6e84!important;color:#fff!important}.cat-btn.clear{background-color:#e9ecef!important;color:#343a40!important;border-color:#ced4da!important}.cat-btn.save-next{background-color:var(--cat-blue)!important;color:#fff!important}.cat-btn:hover:not(:disabled){filter:brightness(.9)!important}.cat-btn.prev{background-color:#f8f9fa!important;color:#333!important;border:1px solid #ccc!important}.cat-btn:disabled{opacity:.5!important;cursor:not-allowed!important}.cat-sidebar{background-color:#f0f4f8!important;display:flex!important;flex-direction:column!important;padding:0!important;border-left:1px solid var(--cat-border)!important}.cat-stats-legend{display:grid!important;grid-template-columns:1fr 1fr!important;gap:8px!important;padding:15px!important;background:#fff!important;border-bottom:1px solid var(--cat-border)!important}.cat-legend{display:grid!important;grid-template-columns:1fr!important;gap:8px!important;padding:15px!important;background:#fff!important;border-top:1px solid var(--cat-border)!important;border-bottom:1px solid var(--cat-border)!important;margin-top:auto!important}.legend-item{display:flex!important;align-items:center!important;gap:10px!important;font-size:.8rem!important;color:#444!important}.legend-box{width:22px!important;height:22px!important;border-radius:2px!important;border:1px solid #ddd!important}.legend-box.answered{background-color:var(--cat-status-answered)!important}.legend-box.not-answered{background-color:var(--cat-status-not-answered)!important;border-radius:0 0 8px 8px!important}.legend-box.not-visited{background-color:#fff!important;border:1px solid #ccc!important}.legend-box.marked{background-color:var(--cat-status-marked)!important;border-radius:50%!important}.legend-box.answered-marked{background-color:var(--cat-status-answered)!important;position:relative!important}.legend-box.answered-marked:after{content:""!important;position:absolute!important;width:8px!important;height:8px!important;background:var(--cat-status-marked)!important;border-radius:50%!important;top:-3px!important;right:-3px!important;border:1px solid white!important}.cat-section-header{background-color:var(--cat-blue)!important;color:#fff!important;padding:8px 15px!important;font-weight:600!important;font-size:.9rem!important}.cat-nav-title{padding:10px 15px!important;font-weight:700!important;font-size:.85rem!important;color:#444!important}.cat-question-grid{display:grid!important;grid-template-columns:repeat(4,1fr)!important;gap:10px!important;padding:0 15px 15px!important;overflow-y:auto!important}.grid-btn{width:100%!important;aspect-ratio:1!important;display:flex!important;align-items:center!important;justify-content:center!important;background:#fff!important;border:1px solid #ccc!important;border-radius:2px!important;font-weight:600!important;cursor:pointer!important;font-size:.9rem!important;position:relative!important}.grid-btn.current{box-shadow:0 0 0 2px var(--cat-blue) inset!important}.grid-btn.answered{background-color:var(--cat-status-answered)!important;color:#fff!important;border-color:var(--cat-status-answered)!important}.grid-btn.not-answered{background-color:var(--cat-status-not-answered)!important;color:#fff!important;border-color:var(--cat-status-not-answered)!important;border-radius:0 0 10px 10px!important}.grid-btn.marked{background-color:var(--cat-status-marked)!important;color:#fff!important;border-color:var(--cat-status-marked)!important;border-radius:50%!important}.grid-btn.answered-marked{background-color:var(--cat-status-answered)!important;color:#fff!important;border-color:var(--cat-status-answered)!important}.grid-btn.answered-marked:after{content:""!important;position:absolute!important;width:10px!important;height:10px!important;background:var(--cat-status-marked)!important;border-radius:50%!important;top:-4px!important;right:-4px!important;border:1px solid white!important}.cat-submit-btn{margin:auto 15px 15px!important;padding:12px!important;background-color:var(--cat-blue)!important;color:#fff!important;border:none!important;border-radius:4px!important;font-weight:700!important;cursor:pointer!important;transition:background .2s!important}.cat-submit-btn:hover{background-color:var(--cat-blue-dark)!important}.modal-overlay{position:fixed!important;inset:0!important;background:#0009!important;display:flex!important;align-items:center!important;justify-content:center!important;z-index:2000!important;-webkit-backdrop-filter:blur(4px)!important;backdrop-filter:blur(4px)!important}.modal-content{background:#fff!important;padding:30px!important;border-radius:12px!important;width:90%!important;max-width:450px!important;box-shadow:0 20px 40px #0003!important}.modal-content h3{margin-top:0!important;font-size:1.5rem!important;color:#222!important}.modal-stats{background:#f8f9fa!important;padding:20px!important;border-radius:8px!important;margin:20px 0!important}.modal-stats p{margin:8px 0!important;display:flex!important;justify-content:space-between!important}.modal-warning{color:#dc3545!important;font-size:.9rem!important;font-weight:600!important}.modal-actions{display:flex!important;gap:15px!important;margin-top:25px!important}.modal-btn{flex:1!important;padding:12px!important;border-radius:6px!important;font-weight:700!important;cursor:pointer!important;border:none!important}.modal-btn.cancel{background:#e9ecef!important;color:#495057!important}.modal-btn.confirm{background:var(--cat-blue)!important;color:#fff!important}@keyframes cat-pulse{0%{opacity:1}50%{opacity:.7}to{opacity:1}}@keyframes cat-blink{50%{opacity:0}}.cat-quiz-wrapper{position:fixed;inset:0;z-index:2000;display:flex;flex-direction:column;background:#e8eaef;font-family:Segoe UI,system-ui,-apple-system,sans-serif;color:#222}.cat-top-header{display:flex;justify-content:space-between;align-items:center;padding:.5rem 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.negative{color:#dc3545;font-weight:600}.cat-main-layout{display:flex;flex:1;overflow:hidden}.cat-question-area{flex:1;display:flex;flex-direction:column;background:#fff;overflow:hidden}.question-scroll-container{flex:1;overflow-y:auto;padding:2rem 3rem}.cat-q-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:2px solid #eee}.q-number{font-size:1.2rem;font-weight:700;color:#333;margin:0}.action-btn.bookmark{background:none;border:1px solid #666;padding:.4rem .8rem;border-radius:4px;cursor:pointer;font-size:.85rem;color:#666;transition:all .2s}.action-btn.bookmark.active{background:#ffc107;border-color:#ffc107;color:#333}.cat-question-text{font-size:1.15rem;line-height:1.8;color:#222;margin-bottom:2rem}.cat-question-text p{margin:0}.cat-options{display:flex;flex-direction:column;gap:.75rem}.cat-option{display:flex;align-items:flex-start;gap:1rem;padding:1rem 1.25rem;background:#fafafa;border:2px solid 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#ddd;display:flex;flex-direction:column;flex-shrink:0}.sidebar-scroll{flex:1;overflow-y:auto;padding:1rem}.panel-header{font-size:1rem;font-weight:700;color:#333;padding-bottom:.75rem;margin-bottom:.75rem;border-bottom:2px solid #4a86e8}.palette-stats{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1rem}.ps-item{font-size:.75rem;padding:.25rem .5rem;border-radius:3px;font-weight:600}.ps-item.answered{background:#d4edda;color:#155724}.ps-item.not-answered{background:#f8d7da;color:#721c24}.ps-item.marked{background:#e2d4f0;color:#6f42c1}.question-palette{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-bottom:1.5rem}.palette-btn{width:100%;aspect-ratio:1;border:1px solid #ccc;border-radius:4px;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .15s;background:#fff;color:#333}.palette-btn.current{box-shadow:0 0 0 3px #4a86e8}.palette-btn.answered{background:#28a745;border-color:#28a745;color:#fff}.palette-btn.not-answered{background:#dc3545;border-color:#dc3545;color:#fff}.palette-btn.not-visited{background:#e9ecef;border-color:#ced4da;color:#495057}.palette-btn.marked{background:#6f42c1;border-color:#6f42c1;color:#fff}.palette-btn.answered-marked{background:linear-gradient(135deg,#28a745 50%,#6f42c1 50%);border-color:#28a745;color:#fff}.palette-legend{display:flex;flex-direction:column;gap:.4rem;font-size:.8rem;color:#555}.legend-item{display:flex;align-items:center;gap:.5rem}.lg-box{width:16px;height:16px;border-radius:3px;border:1px solid #ccc}.lg-box.answered{background:#28a745;border-color:#28a745}.lg-box.not-answered{background:#dc3545;border-color:#dc3545}.lg-box.not-visited{background:#e9ecef}.lg-box.marked{background:#6f42c1;border-color:#6f42c1}.lg-box.answered-marked{background:linear-gradient(135deg,#28a745 50%,#6f42c1 50%)}.cat-submit-test{margin:1rem;padding:.75rem;background:#4a86e8;border:none;border-radius:6px;color:#fff;font-size:1rem;font-weight:700;cursor:pointer;transition:background .2s}.cat-submit-test:hover{background:#3a76d8}.calc-modal{position:fixed;top:50px;right:50px;z-index:3000}.calc-container{background:#f0f0f0;border:1px solid #999;border-radius:8px;box-shadow:0 8px 32px #0000004d;overflow:hidden;width:260px}.calc-header{display:flex;justify-content:space-between;align-items:center;padding:.5rem .75rem;background:#4a86e8;color:#fff;font-weight:600}.calc-close{background:none;border:none;color:#fff;font-size:1rem;cursor:pointer;padding:.25rem}.calc-display{background:#fff;padding:.5rem .75rem;text-align:right;border-bottom:1px solid #ccc}.calc-expression{min-height:1rem;font-size:.85rem;color:#666}.calc-result{font-size:1.5rem;font-weight:700;color:#222;font-family:monospace}.calc-buttons{padding:.5rem}.calc-row{display:flex;gap:4px;margin-bottom:4px}.calc-row.memory button{flex:1;padding:.35rem;font-size:.75rem;background:#e8e8e8;border:1px solid #ccc;border-radius:3px;cursor:pointer}.calc-row button{flex:1;padding:.5rem;font-size:.95rem;background:#f8f8f8;border:1px solid #ccc;border-radius:3px;cursor:pointer;transition:background .15s}.calc-row button:hover{background:#e0e0e0}.calc-row button.fn-btn{background:#e8e8e8}.calc-row button.fn-btn.red{background:#fcc;color:#c00}.calc-row button.fn-btn.green{background:#28a745;color:#fff}.calc-row button.equals{grid-row:span 2}.cat-modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:4000}.cat-modal{background:#fff;border-radius:12px;padding:2rem;max-width:400px;width:90%;box-shadow:0 16px 48px #0000004d}.cat-modal h3{margin:0 0 1rem;font-size:1.4rem;color:#222}.cat-modal p{color:#555;line-height:1.6}.modal-summary{background:#f8f9fa;padding:1rem;border-radius:8px;margin-bottom:1rem}.modal-summary p{margin:.3rem 0;color:#333}.modal-summary .good{color:#28a745;font-weight:700}.modal-summary .warn{color:#dc3545;font-weight:700}.warning-text{color:#dc3545;font-weight:600;margin:1rem 0}.modal-btns{display:flex;gap:1rem;margin-top:1.5rem}.modal-btn{flex:1;padding:.75rem 1rem;font-size:1rem;font-weight:600;border:none;border-radius:6px;cursor:pointer;transition:all .2s}.modal-btn.cancel{background:#e9ecef;color:#495057}.modal-btn.cancel:hover{background:#dee2e6}.modal-btn.submit{background:#28a745;color:#fff}.modal-btn.submit:hover{background:#218838}.modal-btn.exit{background:#dc3545;color:#fff}.modal-btn.exit:hover{background:#c82333}@media(max-width:900px){.cat-main-layout{flex-direction:column}.cat-sidebar-panel{width:100%;max-height:40vh;border-left:none;border-top:1px solid #ddd}.question-palette{grid-template-columns:repeat(8,1fr)}.question-scroll-container{padding:1.5rem}.cat-bottom-controls{flex-wrap:wrap;padding:1rem}.controls-left,.controls-right{width:100%;justify-content:center}}@media(max-width:600px){.cat-top-header{padding:.4rem .75rem}.question-scroll-container{padding:1rem}.cat-question-text{font-size:1rem}.cat-option{padding:.75rem 1rem}.option-content{font-size:.95rem}.question-palette{grid-template-columns:repeat(6,1fr)}.palette-btn{font-size:.75rem}.cat-ctrl-btn{padding:.5rem .75rem;font-size:.8rem}}.premium-badge{display:flex;align-items:center;justify-content:center;gap:.75rem;padding:1rem 2rem;background:linear-gradient(135deg,#9b7dd426,#ffb74d1a);border:1px solid var(--accent-primary);border-radius:16px;margin-bottom:2rem}.premium-badge .badge-icon{font-size:1.5rem}.premium-badge .badge-text{font-size:.95rem;font-weight:600;color:var(--accent-primary);letter-spacing:.02em}.section-header 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bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.winner-name{font-size:3rem;font-weight:900;color:gold;text-shadow:0 0 40px rgba(255,215,0,.3);margin-bottom:.25rem}.winner-title{font-size:1rem;color:#64648c;text-transform:uppercase;letter-spacing:.3em}.final-score{margin-bottom:3rem}.final-score-text{font-size:4rem;font-weight:800;color:#1a1a2e}.final-actions{display:flex;gap:1rem;justify-content:center}.rematch-btn,.exit-btn{display:inline-flex;align-items:center;gap:.5rem;font-size:1rem;font-weight:600;padding:1rem 2rem;border-radius:12px;cursor:pointer;transition:all .2s;text-decoration:none}.rematch-btn{background:linear-gradient(135deg,#00d4aa,#00b894);color:#fff;border:none}.rematch-btn:hover{transform:translateY(-2px)}.exit-btn{background:#f8f8fc;border:1px solid #e5e5f0;color:#1a1a2e}.exit-btn:hover{background:#f0f0ff;border-color:#5b4cfd}@media(max-width:600px){.player-inputs{flex-direction:column}.vs-badge{margin-top:0}.half-question p{font-size:1.1rem}.half-options{grid-template-columns:1fr 1fr}.final-actions{flex-direction:column}}@media(orientation:landscape)and (max-height:500px){.challenge-page.split-screen{flex-direction:row}.player1-half{transform:rotate(90deg);border-bottom:none;border-right:2px solid #e5e5f0}.center-divider{flex-direction:column;width:auto;height:100%;padding:1rem .5rem}}:root{--font-display: "Playfair Display", serif;--font-body: "Instrument Sans", sans-serif;--font-mono: "Space Mono", monospace;--bg-primary: #FDFBF7;--bg-secondary: #F7F3EB;--text-primary: #1A1614;--text-secondary: #5C544D;--text-light: #8E847B;--accent-primary: #6B4C9A;--accent-gold: #B88E44;--accent-success: #3D8B6E;--border-color: rgba(26, 22, 20, .08);--border-prominent: rgba(26, 22, 20, .15);--shadow-color: rgba(0, 0, 0, .04);--glass-bg: rgba(253, 251, 247, .85);--container: 1200px;--navbar-height: 80px;--space-unit: 1rem;--section-padding: 8rem;--transition-fast: .2s cubic-bezier(.16, 1, .3, 1);--transition-base: .5s cubic-bezier(.16, 1, .3, 1)}[data-theme=dark]{--bg-primary: #0D0B0E;--bg-secondary: #161318;--text-primary: #E8E4E0;--text-secondary: #A39B94;--text-light: #6E6660;--accent-primary: #A385D9;--accent-gold: #D4AF5A;--accent-success: #4CAF8C;--border-color: rgba(232, 228, 224, .08);--border-prominent: rgba(232, 228, 224, .15);--shadow-color: rgba(0, 0, 0, .4);--glass-bg: rgba(13, 11, 14, .85)}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-body);line-height:1.6;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-base),color var(--transition-base);overflow-x:hidden}#root{width:100%}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:700;color:var(--text-primary);line-height:1.05;letter-spacing:-.01em}a{color:var(--accent-primary);text-decoration:none;transition:all var(--transition-fast)}p{color:var(--text-secondary);font-size:1.125rem;font-weight:400;line-height:1.6}.container{max-width:var(--container);margin:0 auto;padding:0 2rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.75rem;padding:1rem 2rem;font-family:var(--font-body);font-size:.95rem;font-weight:600;border-radius:8px;border:none;cursor:pointer;transition:all var(--transition-base);text-decoration:none;position:relative;overflow:hidden;letter-spacing:.01em}.btn-primary{background:var(--accent-primary);color:#fff;box-shadow:0 2px 10px #6b4c9a26}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6b4c9a40;background:#7a5bb1}.btn-secondary{background:transparent;color:var(--text-primary);border:1px solid var(--border-prominent)}.btn-secondary:hover{background:var(--bg-secondary);border-color:var(--accent-primary)}.btn-shimmer:after{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:linear-gradient(45deg,transparent 20%,rgba(255,255,255,.1) 50%,transparent 80%);transform:rotate(45deg);animation:shimmer 5s infinite}@keyframes shimmer{0%{transform:translate(-100%) rotate(45deg)}to{transform:translate(100%) rotate(45deg)}}.glass{background:var(--glass-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-color)}.section-airy{padding:var(--section-padding) 0}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-prominent);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-light)}