:root{--primary-color: #007bff;--primary-hover: #0056b3;--secondary-color: #495057;--tertiary-color: #28a745;--tertiary-hover: #218838;--info-color: #17a2b8;--info-hover: #117a8b;--danger-color: #dc3545;--danger-hover: #c82333;--flag-color: #f39c12;--flag-hover: #e67e22;--background-color: #f0f2f5;--card-bg: #ffffff;--text-color: #111111;--light-text: #ffffff;--border-color: #ced4da;--correct-bg: #d4edda;--correct-border: #28a745;--incorrect-bg: #f8d7da;--incorrect-border: #dc3545;--shadow: 0 4px 12px rgba(0,0,0,.1);--border-radius: 8px;--selected-bg: #e7f3ff;--header-height: 80px;--favourite-color: #ffc107;--highlight-yellow: rgba(255, 255, 0, .4);--highlight-pink: rgba(255, 105, 180, .4);--highlight-cyan: rgba(0, 255, 255, .4);--note-color-1: #e0f7fa;--note-color-2: #f1f8e9;--note-color-3: #fffde7;--note-color-4: #fce4ec;--note-color-5: #f3e5f5;--pearls-container-bg: #fdf8e1;--main-nav-bar-height: 75px}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:Roboto,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.6}body.fullscreen-active{overflow:hidden}#root{display:flex;flex-direction:column;min-height:100vh}.app-container{max-width:900px;margin:0 auto;padding:1rem 2rem;width:100%;padding-top:var(--header-height)}.header{background-color:var(--card-bg);padding:1rem 2rem;border-bottom:1px solid var(--border-color);box-shadow:0 2px 4px #0000000d;position:fixed;top:0;left:0;width:100%;z-index:1000;height:var(--header-height);display:flex;justify-content:center;align-items:center}.header-content{max-width:900px;margin:0 auto;width:100%;display:flex;justify-content:space-between;align-items:center;height:100%}.header-title{text-align:left}.header h1{margin:0;color:var(--primary-color);font-size:2rem;font-weight:700;text-align:left}.header p{margin:.25rem 0 0;color:var(--secondary-color);font-size:1rem;text-align:left}.header-user-area,.user-profile{position:relative}.user-avatar{width:48px;height:48px;border-radius:50%;cursor:pointer;border:2px solid var(--primary-color)}.login-btn{background-color:var(--tertiary-color);color:var(--light-text);padding:.6rem 1.2rem}.login-btn:hover{background-color:var(--tertiary-hover)}.user-dropdown{position:absolute;top:60px;right:0;background:var(--card-bg);border-radius:var(--border-radius);box-shadow:var(--shadow);z-index:1001;width:250px;overflow:hidden;animation:fadeIn .2s ease-out}.user-info{padding:1rem;border-bottom:1px solid var(--border-color);text-align:left}.user-info strong{display:block;font-size:1rem;color:var(--text-color)}.user-info span{display:block;font-size:.85rem;color:var(--secondary-color);word-break:break-all}.subscription-status{padding:.25rem .5rem;border-radius:4px;font-size:.8rem;font-weight:700;color:#fff;margin-top:.5rem;display:inline-block}.subscription-trial,.subscription-status.subscription-trial{background-color:var(--secondary-color)}.subscription-paid,.subscription-status.subscription-6-month,.subscription-status.subscription-1-year{background-color:var(--tertiary-color)}.subscription-countdown{font-size:.8rem;color:var(--secondary-color);margin-top:.25rem}.dropdown-btn{width:100%;padding:1rem;background:none;border:none;text-align:left;cursor:pointer;font-size:1rem;display:flex;align-items:center;gap:.75rem;color:var(--text-color)}.dropdown-btn:hover{background-color:#f1f3f5}.dropdown-btn-icon{font-size:1.2rem;line-height:1}.btn{padding:.75rem 1.5rem;font-size:1rem;font-weight:500;border-radius:var(--border-radius);border:none;cursor:pointer;transition:all .2s ease-in-out;text-align:center}.btn-primary{background-color:var(--primary-color);color:var(--light-text)}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover);transform:translateY(-2px);box-shadow:0 2px 5px #0003}.btn-primary:disabled{background-color:#a0c9f7;cursor:not-allowed}.btn-secondary{background-color:var(--secondary-color);color:var(--light-text)}.btn-secondary:hover:not(:disabled){background-color:#343a40;transform:translateY(-2px);box-shadow:0 2px 5px #0003}.btn-secondary:disabled{background-color:#ccc;cursor:not-allowed}.btn-tertiary{background-color:var(--tertiary-color);color:var(--light-text)}.btn-tertiary:hover:not(:disabled){background-color:var(--tertiary-hover);transform:translateY(-2px);box-shadow:0 2px 5px #0003}.btn-tertiary:disabled{background-color:#89d89a;cursor:not-allowed}.btn-info{background-color:var(--info-color);color:var(--light-text)}.btn-info:hover:not(:disabled){background-color:var(--info-hover)}.btn-sm{padding:.4rem .8rem;font-size:.85rem}.nav-bar{position:sticky;top:var(--header-height);background-color:var(--background-color);z-index:990;padding:1rem 0 .5rem;margin-bottom:1.5rem;border-bottom:1px solid var(--border-color)}.nav-bar-main{display:flex;justify-content:space-between;align-items:center;width:100%;gap:1rem}.nav-bar-left,.nav-bar-right{flex:1 1 0}.nav-bar-right{display:flex;justify-content:flex-end}.nav-bar-center{flex:3 1 auto;text-align:center;overflow:hidden}.nav-bar-title{margin:0;font-size:1.5rem;color:var(--primary-color);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;justify-content:center;align-items:center}.nav-back-btn{background:none;border:1px solid var(--secondary-color);color:var(--secondary-color);padding:.5rem 1.25rem;font-weight:700}.nav-back-btn:hover{background:var(--secondary-color);color:var(--light-text)}.nav-action-btn{background-color:var(--secondary-color);color:var(--light-text);padding:.5rem 1.25rem;font-size:.9rem}.nav-action-btn:hover{background-color:#343a40}.nav-bar .progress-bar-container{margin-top:1rem;height:10px}.view-content-wrapper{padding-top:1rem}.card{background:var(--card-bg);padding:1.5rem;border-radius:var(--border-radius);box-shadow:var(--shadow);margin-bottom:1.5rem;color:var(--text-color)}.home-view-header{display:flex;justify-content:center;align-items:center;gap:1rem;margin-bottom:2rem}.home-view-header h2{margin:0;font-size:1.8rem;color:var(--text-color)}.favourites-star-btn{background:none;border:none;padding:0;cursor:pointer;font-size:2rem;line-height:1;transition:transform .2s ease;color:var(--favourite-color)}.favourites-star-btn:hover{transform:scale(1.2)}.mode-selection{display:flex;justify-content:center;gap:1rem;margin-bottom:2.5rem}.subject-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1.5rem}.subject-card{background-color:var(--card-bg);border-radius:var(--border-radius);padding:1.5rem;text-align:center;box-shadow:var(--shadow);border:1px solid var(--border-color);cursor:pointer;transition:transform .2s ease,box-shadow .2s ease;display:flex;flex-direction:column;justify-content:space-between;color:var(--text-color)}.subject-card:hover{transform:translateY(-5px);box-shadow:0 6px 16px #00000026;border-color:var(--primary-color)}.subject-card.highlight{transition:all .5s ease-in-out;box-shadow:0 0 15px 5px var(--primary-color);border-color:var(--primary-color);transform:translateY(-5px) scale(1.03)}.subject-card .icon{font-size:3rem;line-height:1}.subject-card-header{display:flex;align-items:center;justify-content:center;gap:.5rem;margin-top:1rem}.subject-card-header h3{margin:0;font-size:1.25rem;color:var(--text-color)}.progress-bar-container{height:8px;width:100%;background-color:#e9ecef;border-radius:var(--border-radius);overflow:hidden;margin-top:1rem;border:1px solid #dee2e6}.progress-bar{height:100%;width:0;background-color:var(--primary-color);transition:width .3s ease-in-out}.topic-list{list-style:none;padding:0;margin:0}.topic-item{background:var(--card-bg);padding:1.25rem;border-radius:var(--border-radius);margin-bottom:1rem;box-shadow:var(--shadow);cursor:pointer;transition:background-color .2s ease;font-size:1.1rem;font-weight:500;display:flex;justify-content:space-between;align-items:center;color:var(--text-color);border:1px solid var(--border-color)}.topic-item:hover{background-color:#f1f3f5;border-color:var(--primary-color)}.topic-item.highlight-transient{transition:all .5s ease-in-out;box-shadow:0 0 15px 3px var(--primary-color);border:1px solid var(--primary-color);transform:scale(1.02)}.completion-tick{font-size:1.2rem;margin-left:.5rem}.practice-view{padding-bottom:100px}.favourite-btn{background:none;border:none;font-size:1.8rem;line-height:1;padding:0 .5rem;color:var(--secondary-color);transition:color .2s,transform .2s}.favourite-btn.favourited{color:var(--favourite-color)}.favourite-btn:hover{transform:scale(1.2)}.question-container{background:var(--card-bg);padding:2rem;border-radius:var(--border-radius);box-shadow:var(--shadow);border:1px solid var(--border-color)}.question-text{font-size:1.25rem;margin-top:0;margin-bottom:1.5rem;font-weight:500;color:#000;line-height:1.5}.options-grid{display:grid;gap:1rem;position:relative}.trial-ended-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background-color:#fffffff2;z-index:10;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:1rem;border-radius:var(--border-radius);border:2px dashed var(--primary-color)}.trial-ended-overlay h3{color:var(--primary-color)}.option-btn{display:block;width:100%;padding:1rem;font-size:1rem;text-align:left;background-color:#fff;color:#212529;border:1px solid var(--border-color);border-radius:var(--border-radius);cursor:pointer;transition:all .2s;font-weight:500;box-shadow:0 1px 3px #0000000d}.option-btn:hover:not(:disabled){background-color:#f8f9fa;border-color:#adb5bd}.option-btn:disabled{cursor:default;opacity:1}.option-btn.selected{background-color:var(--selected-bg);border-color:var(--primary-color);color:var(--primary-color);font-weight:700;box-shadow:0 0 0 1px var(--primary-color)}.option-btn.correct{background-color:var(--correct-bg);border-color:var(--correct-border);color:#155724;font-weight:700}.option-btn.incorrect{background-color:var(--incorrect-bg);border-color:var(--incorrect-border);color:#721c24}.explanation{margin-top:1.5rem;padding:1.5rem;background-color:#e7f3ff;border:1px solid #b3d7ff;border-radius:var(--border-radius);color:var(--text-color)}.explanation h4{margin-top:0;color:var(--primary-color)}.learning-zone{margin-top:2rem;border-top:1px solid var(--border-color);padding-top:2rem;display:flex;gap:1.5rem;justify-content:center;flex-wrap:wrap}.learning-zone-btn{flex:1;min-width:200px;max-width:280px;padding:1rem 1.5rem;font-size:1.25rem;font-weight:700;border-radius:var(--border-radius);border:2px solid var(--border-color);background-color:var(--card-bg);cursor:pointer;transition:all .2s ease-in-out;text-align:center;display:flex;align-items:center;justify-content:center;gap:.75rem;box-shadow:0 2px 4px #0000000d}.learning-zone-btn:hover:not(:disabled){transform:translateY(-5px);box-shadow:0 6px 12px #0000001a}.learning-zone-btn:disabled{opacity:.6;cursor:not-allowed;background-color:#f8f9fa;color:var(--secondary-color);border-color:var(--border-color)}.learning-zone-btn:nth-of-type(1){color:#8b4513;border-color:#d4af37}.learning-zone-btn:nth-of-type(1):hover:not(:disabled){background-color:var(--pearls-container-bg);border-color:#c5a034;color:#3d3d3d}.learning-zone-btn:nth-of-type(2){color:var(--info-color);border-color:var(--info-color)}.learning-zone-btn:nth-of-type(2):hover:not(:disabled){background-color:var(--info-color);color:#fff}.learning-zone-btn:nth-of-type(3){color:var(--tertiary-color);border-color:var(--tertiary-color)}.learning-zone-btn:nth-of-type(3):hover:not(:disabled){background-color:var(--tertiary-color);color:#fff}.practice-footer{position:fixed;bottom:0;left:0;width:100%;background:var(--card-bg);border-top:1px solid var(--border-color);box-shadow:0 -2px 5px #0000000d;z-index:1000}.practice-footer-content{max-width:900px;margin:0 auto;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.pearls-section{margin-top:1.5rem;border-top:1px solid var(--border-color);padding-top:1.5rem}.pearls-btn{background-color:#9b59b6;color:var(--light-text);font-weight:500;width:100%}.pearls-btn:hover:not(:disabled){background-color:#8e44ad;transform:translateY(-2px);box-shadow:0 2px 5px #0003}.pearls-btn:disabled{background-color:#bdc3c7;cursor:wait}.pearls-container{margin-top:1rem;padding:1.5rem;background-color:var(--pearls-container-bg);border-left:5px solid #d4af37;border-radius:var(--border-radius);font-family:Georgia,serif;color:#3d3d3d;line-height:1.7;animation:fadeIn .5s ease-in-out}.pearls-container ul{padding-left:20px;margin-top:0}.pearls-container li{margin-bottom:.5rem}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.pearls-container h4{color:#8b4513;border-bottom:2px solid #d4af37;padding-bottom:.5rem;margin-top:0}.pearls-error{color:var(--incorrect-border);font-weight:700;background-color:var(--incorrect-bg);border-left-color:var(--incorrect-border)}.chatbox{margin-top:1.5rem;border-top:1px solid var(--border-color);padding-top:1.5rem;display:flex;flex-direction:column}.chatbox-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}.chatbox h4{color:var(--primary-color);margin:0}.chat-history{max-height:300px;overflow-y:auto;padding:1rem;background-color:#f8f9fa;border-radius:var(--border-radius);margin-bottom:1rem;display:flex;flex-direction:column;gap:1rem;border:1px solid var(--border-color)}.chat-message{padding:.75rem 1rem;border-radius:var(--border-radius);max-width:80%;line-height:1.5}.chat-message.user{background-color:var(--selected-bg);color:var(--text-color);align-self:flex-end;border-bottom-right-radius:2px}.chat-message.model{background-color:var(--card-bg);color:var(--text-color);align-self:flex-start;border:1px solid var(--border-color);border-bottom-left-radius:2px}.chat-message p{margin:0}.chat-loading{color:var(--secondary-color)}.chat-input-area{display:flex;gap:.5rem}.chat-input-area input{flex-grow:1;padding:.75rem;border:1px solid var(--border-color);border-radius:var(--border-radius);font-size:1rem;color:var(--text-color)}.chat-input-area button{padding:.75rem 1.25rem}.btn-link{background:none;border:none;color:var(--primary-color);cursor:pointer;padding:.25rem 0;font-size:.9rem;font-weight:700;text-align:left;display:inline-block;margin-top:.5rem}.btn-link:hover{text-decoration:underline}.suggested-questions{margin-top:1rem;padding-top:1rem;border-top:1px dashed var(--border-color)}.suggested-questions p{margin:0 0 .5rem;font-size:.9rem;font-weight:700;color:var(--secondary-color)}.btn-suggestion{background-color:#e9ecef;border:1px solid var(--border-color);border-radius:var(--border-radius);padding:.5rem 1rem;font-size:.9rem;cursor:pointer;transition:background-color .2s;margin-right:.5rem;margin-bottom:.5rem;color:var(--text-color)}.btn-suggestion:hover{background-color:#dee2e6}.exam-setup-view{padding-bottom:90px}.exam-setup-view .view-content-wrapper,.exam-history-view .view-content-wrapper,.exam-results-view .view-content-wrapper{padding-top:0}.exam-config-card{background:var(--card-bg);padding:1.5rem;border-radius:var(--border-radius);box-shadow:var(--shadow);margin-bottom:1.5rem}.exam-config-card h3{margin-top:0;border-bottom:1px solid var(--border-color);padding-bottom:.75rem;color:var(--text-color)}.subject-selection-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:.75rem}.checkbox-label,.radio-label{display:flex;align-items:center;gap:.5rem;padding:.5rem;border-radius:var(--border-radius);transition:background-color .2s;cursor:pointer;color:var(--text-color)}.checkbox-label:hover,.radio-label:hover{background-color:#f1f3f5}.num-questions-selection{display:flex;gap:1.5rem;flex-wrap:wrap}.exam-setup-footer{position:fixed;bottom:0;left:0;width:100%;background:var(--card-bg);border-top:1px solid var(--border-color);box-shadow:0 -2px 5px #0000000d;z-index:999}.exam-setup-footer-content{max-width:900px;margin:0 auto;padding:1rem 2rem}.exam-setup-footer .start-exam-btn{width:100%;font-size:1.2rem}.exam-inprogress-view{display:flex;flex-direction:column;height:calc(100vh - 80px);max-height:calc(100vh - 80px);position:fixed;top:var(--header-height);left:0;right:0;bottom:0;max-width:900px;margin:0 auto}.exam-header{display:flex;flex-direction:column;padding:.75rem 1rem;background-color:var(--card-bg);border-bottom:1px solid var(--border-color);flex-shrink:0}.exam-header-main{display:flex;justify-content:space-between;align-items:center;width:100%}.exam-header .timer{font-size:1.2rem;font-weight:700;color:var(--primary-color)}.exam-header-info{font-weight:500}.finish-exam-header-btn{background-color:var(--danger-color);color:var(--light-text);padding:.5rem 1rem;font-size:.9rem}.finish-exam-header-btn:hover{background-color:var(--danger-hover)}.exam-header .progress-bar-container{margin-top:.75rem;width:100%;height:10px}.exam-content-area{flex-grow:1;overflow-y:auto;padding:1.5rem 1rem}.exam-inprogress-view .question-container{flex-grow:1;overflow-y:auto;margin:0}.exam-footer{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;border-top:1px solid var(--border-color);background:var(--card-bg);flex-shrink:0}.flag-btn{background-color:var(--flag-color);color:#fff}.flag-btn.flagged{background-color:var(--flag-hover)}.flag-btn:hover:not(:disabled){background-color:var(--flag-hover)}.exam-review-panel{animation:fadeIn .3s ease-in-out;padding:1.5rem}.modal-content.exam-review-panel{max-width:700px;max-height:90vh;display:flex;flex-direction:column}.exam-review-header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-color);padding-bottom:1rem;margin-bottom:1rem}.exam-review-header h3{margin:0;color:var(--primary-color)}.close-review-btn{background:none;border:none;font-size:2rem;line-height:1;cursor:pointer;color:var(--secondary-color)}.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(50px,1fr));gap:.75rem;margin-bottom:1.5rem;overflow-y:auto;flex:1;padding-right:5px}.review-q-btn{position:relative;aspect-ratio:1 / 1;border:1px solid var(--border-color);border-radius:var(--border-radius);background-color:var(--card-bg);cursor:pointer;transition:all .2s ease;font-weight:700;font-size:1.1rem;color:var(--text-color)}.review-q-btn:hover{transform:scale(1.05);border-color:var(--primary-color)}.review-q-btn.answered{background-color:var(--correct-bg);border-color:var(--correct-border)}.review-q-btn.current{background-color:var(--selected-bg);border-color:var(--primary-color);transform:scale(1.1)}.review-q-btn.correct-answer{background-color:var(--correct-bg);border-color:var(--correct-border)}.review-q-btn.incorrect-answer{background-color:var(--incorrect-bg);border-color:var(--incorrect-border)}.review-flag{position:absolute;top:-5px;right:-5px;font-size:1rem;line-height:1}.review-legend{display:flex;flex-wrap:wrap;gap:1.5rem;font-size:.9rem;align-items:center}.review-legend>div{display:flex;align-items:center;gap:.5rem}.legend-box{width:15px;height:15px;border:1px solid var(--border-color);border-radius:3px}.legend-box.answered{background-color:var(--correct-bg);border-color:var(--correct-border)}.legend-box.current{background-color:var(--selected-bg);border-color:var(--primary-color)}.legend-box.correct-answer{background-color:var(--correct-bg);border-color:var(--correct-border)}.legend-box.incorrect-answer{background-color:var(--incorrect-bg);border-color:var(--incorrect-border)}.review-legend .legend-box{display:inline-flex;justify-content:center;align-items:center;vertical-align:middle}.review-legend .review-flag{position:static;font-size:11px}.exam-results-view{padding-bottom:100px}.results-summary.card,.subject-performance.card,.answer-review.card{padding:1.5rem}.subject-performance .progress-bar-container{margin-top:.5rem}.subject-perf-item{margin-bottom:1rem}.subject-perf-item span:first-child{font-weight:500}.subject-perf-item span:nth-child(2){float:right;color:var(--secondary-color)}.review-question-container{padding:1.5rem 0 0}.review-question-container .explanation{margin-bottom:0}.exam-results-footer{position:fixed;bottom:0;width:100%;max-width:900px;background:var(--card-bg);border-top:1px solid var(--border-color);box-shadow:0 -2px 5px #0000000d;z-index:1000;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;left:50%;transform:translate(-50%)}.start-review-container{text-align:center;margin-top:2rem}.start-review-btn{font-size:1.2rem;padding:1rem 2rem;width:100%;max-width:400px}.collapsible-header{display:flex;justify-content:space-between;align-items:center;cursor:pointer}.collapsible-header h3{margin:0}.collapse-icon{font-size:1rem;color:var(--secondary-color);transition:transform .2s ease-in-out}.collapsible-content{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border-color);animation:fadeIn .4s ease}.history-list{list-style:none;padding:0}.history-item{cursor:pointer;transition:transform .2s,box-shadow .2s;border:1px solid var(--border-color)}.history-item:hover{transform:translateY(-3px);box-shadow:0 6px 12px #0000001a;border-color:var(--primary-color)}.history-item-date{font-weight:700;color:var(--primary-color)}.history-item-score{font-size:1.1rem;margin:.5rem 0}.history-item-subjects{font-size:.9rem;color:var(--secondary-color)}.history-item-details{float:right;font-size:.9rem;color:var(--secondary-color)}.note-editor{margin-top:1.5rem;border-top:1px solid var(--border-color);padding-top:1.5rem;display:flex;flex-direction:column}.note-editor h4{margin-top:0;color:var(--primary-color)}.note-editor-toolbar{background:#f1f3f5;border:1px solid var(--border-color);border-bottom:none;padding:5px;border-radius:var(--border-radius) var(--border-radius) 0 0;display:flex;gap:5px}.note-editor-toolbar button{background:#fff;border:1px solid var(--border-color);border-radius:4px;cursor:pointer;font-size:1rem;line-height:1;width:30px;height:30px;padding:0;transition:background-color .2s;color:#000}.note-editor-toolbar button:hover{background-color:#e9ecef}.toolbar-spacer{flex-grow:1}.btn-fullscreen{background:none!important;border:none!important;font-size:1.2rem;color:var(--secondary-color)}.btn-fullscreen:hover{color:var(--primary-color);transform:scale(1.1)}.note-editor-content{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:0 0 var(--border-radius) var(--border-radius);font-family:inherit;font-size:1rem;line-height:1.5;min-height:120px;resize:vertical;overflow:auto;background-color:var(--card-bg);color:var(--text-color)}.note-editor-content:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #007bff40}.note-editor-content:empty:before{content:attr(data-placeholder);color:#6c757d;pointer-events:none}.note-options{margin-top:.75rem}.note-options label{display:flex;align-items:center;gap:.5rem;font-size:.9rem;color:var(--secondary-color);cursor:pointer}.floating-notes-toggle-btn{position:fixed;top:50%;right:0;transform:translateY(-50%);background-color:var(--primary-color);color:#fff;border:none;border-radius:8px 0 0 8px;padding:1rem .75rem;cursor:pointer;z-index:1010;box-shadow:-2px 2px 8px #0003;font-size:1.5rem;transition:transform .3s ease,opacity .3s ease}.floating-notes-toggle-btn.open{transform:translateY(-50%) translate(-350px);opacity:0;pointer-events:none}.floating-notes-panel{position:fixed;top:0;right:0;width:350px;height:100vh;background-color:var(--background-color);box-shadow:var(--shadow);z-index:1009;transform:translate(100%);transition:transform .3s ease-in-out;display:flex;flex-direction:column}.floating-notes-panel.open{transform:translate(0)}.floating-notes-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;border-bottom:1px solid var(--border-color);background-color:var(--card-bg);flex-shrink:0;position:sticky;top:0;z-index:1}.floating-notes-header h3{margin:0;color:var(--primary-color);font-size:1.2rem}.floating-notes-header button{background:none;border:none;font-size:2rem;line-height:1;cursor:pointer;color:var(--secondary-color);padding:0;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:background-color .2s ease}.floating-notes-header button:hover{background-color:#e9ecef}.floating-notes-content{flex-grow:1;overflow-y:auto;padding:1rem}.floating-notes-content .no-notes-message{padding:0 .5rem}.notes-date-group{margin-top:1.5rem}.notes-date-group:first-of-type{margin-top:0}.notes-date-header{font-size:.9rem;font-weight:700;color:var(--secondary-color);padding-left:.5rem;margin-bottom:.75rem;text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border-color);padding-bottom:.5rem}.floating-note-item{margin-bottom:.5rem;border-radius:var(--border-radius);overflow:hidden;transition:background-color .2s;border:1px solid transparent}.floating-note-item.highlight-transient{transition:all .5s ease-in-out;box-shadow:0 0 15px 3px var(--primary-color);border:1px solid var(--primary-color);transform:scale(1.02)}.floating-note-header-clickable{padding:.75rem 1rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:500}.floating-note-header-clickable:hover .expand-indicator{transform:translate(3px)}.floating-note-header-clickable h4{margin:0;font-size:1rem;color:#333;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.expand-indicator{font-size:.8rem;transition:transform .2s;flex-shrink:0;margin-left:.5rem}.note-detail-view{padding-bottom:80px}.note-detail-footer{position:sticky;bottom:-1rem;left:-1rem;right:-1rem;padding:1rem 1.5rem;background-color:var(--card-bg);border-top:1px solid var(--border-color);box-shadow:0 -2px 5px #0000000d;display:flex;gap:1rem;z-index:10}.note-detail-footer .btn{flex:1}.note-part{padding:1rem;border-radius:var(--border-radius);margin-bottom:1.5rem}.note-part h5{margin-top:0;margin-bottom:.75rem;padding-bottom:.5rem;border-bottom:1px solid rgba(0,0,0,.1)}.note-part-user{background-color:#ffffffb3}.note-part-pearls{background-color:var(--pearls-container-bg)}.note-part-ai{background-color:#f1f3f5}.note-content-display p:first-child,.note-content-display div:first-child{margin-top:0}.note-content-display p:last-child,.note-content-display div:last-child{margin-bottom:0}.note-chat-history{display:flex;flex-direction:column;gap:.75rem;max-height:250px;overflow-y:auto}.note-chat-message{padding:.5rem .75rem;border-radius:var(--border-radius);max-width:95%}.note-chat-message.user{background-color:var(--selected-bg);align-self:flex-end}.note-chat-message.model{background-color:var(--card-bg);border:1px solid var(--border-color);align-self:flex-start}.note-color-1{background-color:var(--note-color-1)}.note-color-2{background-color:var(--note-color-2)}.note-color-3{background-color:var(--note-color-3)}.note-color-4{background-color:var(--note-color-4)}.note-color-5{background-color:var(--note-color-5)}.highlight-toolbar{position:absolute;z-index:2001;background:#333;border-radius:6px;padding:5px 8px;display:flex;gap:5px;align-items:center;box-shadow:0 2px 10px #0000004d;-webkit-user-select:none;user-select:none}.highlight-tool-btn{background:none;border:none;color:#fff;font-size:18px;cursor:pointer;padding:2px 4px;transition:transform .1s ease}.highlight-tool-btn:hover{transform:scale(1.2)}.highlight-separator{width:1px;height:20px;background-color:#555;margin:0 4px}.highlight-color-btn{width:24px;height:24px;border-radius:50%;border:2px solid white;cursor:pointer;transition:transform .1s ease;padding:0}.highlight-color-btn:hover{transform:scale(1.2)}.highlight-yellow{background-color:var(--highlight-yellow)}.highlight-pink{background-color:var(--highlight-pink)}.highlight-cyan{background-color:var(--highlight-cyan)}mark.highlight-yellow{background-color:var(--highlight-yellow)}mark.highlight-pink{background-color:var(--highlight-pink)}mark.highlight-cyan{background-color:var(--highlight-cyan)}.loading-dots{display:flex;align-items:center;justify-content:center}.loading-dots span{display:inline-block;width:8px;height:8px;border-radius:50%;background-color:var(--secondary-color);margin:0 3px;animation:loading-pulse 1.4s infinite ease-in-out}.loading-dots span:nth-child(1){animation-delay:-.32s}.loading-dots span:nth-child(2){animation-delay:-.16s}@keyframes loading-pulse{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}@keyframes slide-in-bottom{0%{transform:translateY(100px);opacity:0}to{transform:translateY(0);opacity:1}}.toast-notification{position:fixed;bottom:20px;left:50%;transform:translate(-50%);background-color:var(--tertiary-color);color:var(--light-text);padding:1rem 1.5rem;border-radius:50px;box-shadow:0 4px 12px #0003;display:flex;align-items:center;gap:1rem;z-index:9999;animation:toast-in .5s ease-out,toast-out .5s ease-in 2.5s}@keyframes toast-in{0%{transform:translate(-50%,100px);opacity:0}to{transform:translate(-50%);opacity:1}}@keyframes toast-out{0%{transform:translate(-50%);opacity:1}to{transform:translate(-50%,100px);opacity:0}}.toast-icon{font-size:1.5rem}.toast-message{font-weight:500}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#212529cc;display:flex;justify-content:center;align-items:center;z-index:2000;animation:fadeIn .3s ease;padding:1rem;cursor:default}.modal-content{background:linear-gradient(135deg,#fff,#f7f9fc);padding:2.5rem;border-radius:var(--border-radius);box-shadow:0 10px 25px #0003;text-align:center;max-width:500px;width:100%;position:relative;border-top:5px solid var(--primary-color);animation:slide-in-bottom .4s cubic-bezier(.25,.46,.45,.94) both}.modal-content h3{text-align:center;margin-top:0;color:var(--primary-color);font-size:1.75rem;font-weight:700}.modal-content p{color:var(--secondary-color);line-height:1.6;margin:.5rem 0 1rem}.modal-content p.modal-subtitle{text-align:center;margin-bottom:2rem;font-size:1.1rem}.modal-content p strong{color:var(--text-color)}.benefits-list{list-style:none;padding:0;margin:2rem 0;text-align:left}.benefit-item{display:flex;align-items:flex-start;gap:1rem;margin-bottom:1.5rem}.benefit-icon{font-size:1.75rem;margin-top:0;line-height:1;color:var(--primary-color)}.benefit-text strong{display:block;color:var(--text-color);margin-bottom:.25rem}.benefit-text p{margin:0;font-size:.95rem;line-height:1.5;color:var(--secondary-color)}.btn-google{display:inline-flex;align-items:center;justify-content:center;gap:.75rem;font-size:1.1rem;margin-top:1rem;width:100%;padding:.9rem;font-weight:700}.btn-google svg{width:24px;height:24px}.modal-actions{display:flex;justify-content:flex-end;gap:1rem;margin-top:2rem}.fullscreen-modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#212529cc;display:flex;justify-content:center;align-items:center;z-index:2000;animation:fadeIn .3s ease;padding:1rem}.fullscreen-modal-content{background:var(--card-bg);border-radius:var(--border-radius);box-shadow:0 10px 25px #0003;width:100%;height:100%;max-width:1200px;max-height:95vh;display:flex;flex-direction:column;animation:slide-in-bottom .4s cubic-bezier(.25,.46,.45,.94) both;overflow:hidden}.fullscreen-modal-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;border-bottom:1px solid var(--border-color);flex-shrink:0}.fullscreen-modal-header h2{margin:0;font-size:1.5rem;color:var(--primary-color)}.fullscreen-modal-close-btn{background:none;border:none;font-size:2.5rem;line-height:1;cursor:pointer;color:var(--secondary-color);padding:.25rem;border-radius:50%;width:44px;height:44px;display:flex;align-items:center;justify-content:center;transition:background-color .2s ease,color .2s ease}.fullscreen-modal-close-btn:hover{background-color:#f1f3f5;color:var(--primary-color)}.fullscreen-modal-body{flex-grow:1;overflow-y:auto;padding:1.5rem;position:relative}.fullscreen-modal-body .pearls-section{padding-top:0;margin-top:0;border-top:none}.fullscreen-modal-body .note-editor,.fullscreen-modal-body .chatbox{margin-top:0;border-top:none;padding-top:0;height:100%}.fullscreen-modal-body .note-editor{display:flex;flex-direction:column}.fullscreen-modal-body .note-editor-content{flex-grow:1;min-height:200px;resize:none}.fullscreen-modal-body .chatbox{display:flex;flex-direction:column}.fullscreen-modal-body .chat-history{flex-grow:1;max-height:none}.subscription-modal{padding:1.5rem}.subscription-plans{display:flex;gap:1.5rem;margin:2rem 0}.plan-card{flex:1;padding:1rem;border:2px solid var(--border-color);border-radius:var(--border-radius);text-align:center;transition:all .2s ease-in-out;background-color:#fff;color:var(--text-color)}.plan-card h4{margin-top:0;color:var(--primary-color)}.plan-card .price{font-size:1.8rem;font-weight:700;margin:.5rem 0}.plan-card .duration{color:var(--secondary-color)}.plan-card.recommended{border-color:var(--primary-color);border-width:3px;position:relative;transform:scale(1.05)}.plan-badge-container{position:absolute;top:-15px;left:50%;transform:translate(-50%);display:flex;gap:5px}.plan-badge{padding:4px 10px;border-radius:12px;font-size:.7rem;font-weight:700;color:#fff;text-transform:uppercase}.recommended-badge{background-color:var(--primary-color)}.savings-badge{background-color:var(--tertiary-color)}.choice-badge{font-size:.8rem;color:var(--tertiary-color);font-weight:700;margin-top:.5rem}.collapsible-bank-details{margin:1.5rem 0;border:1px solid var(--border-color);border-radius:var(--border-radius);overflow:hidden}.collapsible-header-btn{display:flex;justify-content:space-between;align-items:center;width:100%;padding:1rem;background:#f8f9fa;border:none;border-bottom:1px solid var(--border-color);cursor:pointer;text-align:left}.collapsible-header-btn[aria-expanded=false]{border-bottom:none}.collapsible-header-btn h4{margin:0;font-size:1.1rem;color:var(--text-color)}.collapsible-header-btn .collapse-icon{transition:transform .3s ease}.collapsible-header-btn[aria-expanded=true] .collapse-icon{transform:rotate(180deg)}.bank-details{padding:1rem;background-color:#f1f3f5;text-align:left;font-size:.9rem}.bank-details p{margin:.5rem 0;display:flex;justify-content:space-between;align-items:center}.copy-btn{background:none;border:none;cursor:pointer;font-size:1.2rem;opacity:.6;transition:opacity .2s;padding:0 .5rem}.copy-btn:hover{opacity:1}.upload-section{margin-top:1.5rem}.upload-label{display:inline-block;padding:.75rem 1.5rem;background-color:var(--tertiary-color);color:#fff;border-radius:var(--border-radius);cursor:pointer;transition:background-color .2s}.upload-label:hover{background-color:var(--tertiary-hover)}#receipt-upload{display:none}.upload-caption{font-size:.8rem;color:var(--secondary-color);margin-top:.5rem;display:block}.receipt-error{color:var(--danger-color);font-weight:700;margin-top:1rem}.support-modal-content{display:flex;flex-direction:column;gap:1rem;margin-top:1.5rem}.support-modal-content a{text-decoration:none}.support-modal-content .btn{width:100%;display:flex;align-items:center;justify-content:center;gap:.75rem;font-size:1.1rem}.support-whatsapp{background-color:#25d366;color:#fff}.support-whatsapp:hover{background-color:#128c7e}.support-email{background-color:var(--secondary-color);color:#fff}.support-email:hover{background-color:#343a40}.install-prompt-modal h3{font-size:1.5rem}.install-prompt-modal .close-review-btn{position:absolute;top:10px;right:10px}.ios-install-instructions{margin-top:1rem}.ios-install-instructions ol{text-align:left;padding-left:20px;line-height:2}.ios-install-instructions li{margin-bottom:1rem;display:flex;align-items:center}.share-icon{display:inline-block;vertical-align:middle;width:24px;height:24px;margin:0 4px}.android-install-instructions{margin-top:1.5rem}.btn-install{width:100%;margin-top:1rem;font-size:1.1rem;padding:.9rem}.admin-view .view-content-wrapper{padding-top:0}.admin-view h2{margin-top:0;margin-bottom:1.5rem;color:var(--primary-color)}.admin-error{color:var(--danger-color);font-weight:500;padding:1.5rem;background-color:var(--incorrect-bg);border:1px solid var(--incorrect-border);border-radius:var(--border-radius)}.admin-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.5rem;margin-bottom:2rem}.admin-card{background:var(--card-bg);padding:1.5rem;border-radius:var(--border-radius);box-shadow:var(--shadow);color:var(--text-color)}.admin-card h3{margin-top:0;font-size:1rem;color:var(--secondary-color)}.admin-card p{margin:.5rem 0 0;font-size:2rem;font-weight:700;color:var(--primary-color)}.admin-sub-details{display:flex;flex-direction:column;gap:.5rem;font-size:.9rem}.admin-charts{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:1.5rem;margin-bottom:2rem}.admin-chart-container{background:var(--card-bg);padding:1.5rem;border-radius:var(--border-radius);box-shadow:var(--shadow)}.admin-chart-container h4{margin-top:0;text-align:center;color:var(--secondary-color)}.admin-search-bar{width:100%;padding:.75rem;font-size:1rem;border:1px solid var(--border-color);border-radius:var(--border-radius);margin-bottom:1.5rem;color:var(--text-color)}.admin-user-table-container{overflow-x:auto}.admin-user-table{width:100%;border-collapse:collapse;font-size:.9rem;white-space:nowrap}.admin-user-table th,.admin-user-table td{padding:.75rem;text-align:left;border-bottom:1px solid var(--border-color)}.admin-user-table th{background-color:#f8f9fa;font-weight:600;color:var(--text-color)}.admin-user-table tbody tr:hover{background-color:#f1f3f5}.admin-pagination{display:flex;justify-content:center;align-items:center;gap:1rem;margin-top:1.5rem}.admin-pagination button{padding:.5rem 1rem}.admin-pagination button:disabled{opacity:.5;cursor:not-allowed}.admin-user-modal{max-width:600px;text-align:left}.admin-user-details{display:flex;align-items:center;gap:1.5rem;margin-bottom:1.5rem}.admin-user-avatar{width:80px;height:80px;border-radius:50%}.admin-user-modal h4{margin-top:1.5rem;margin-bottom:.5rem;border-bottom:1px solid var(--border-color);padding-bottom:.5rem;color:var(--primary-color)}.admin-subscription-control{display:flex;gap:1rem;align-items:center;flex-wrap:wrap}.admin-subscription-control select{padding:.5rem;font-size:1rem;border-radius:var(--border-radius);border:1px solid var(--border-color)}.admin-user-progress,.admin-user-exams{max-height:200px;overflow-y:auto;padding-right:1rem}.admin-user-exams ul{list-style:none;padding:0}.admin-user-exams li{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem;padding:.5rem 0;border-bottom:1px solid #f1f3f5}@media(max-width:768px){html{font-size:17px}.app-container,.header,.practice-footer-content,.exam-setup-footer-content,.exam-results-footer{padding-left:1rem;padding-right:1rem}.header h1{font-size:1.5rem}.header p{font-size:.8rem}.modal-content{padding:1.5rem}.subject-grid{grid-template-columns:1fr}.subscription-plans{flex-direction:column}.admin-charts{grid-template-columns:1fr}.nav-bar-left,.nav-bar-right{flex-grow:0}}@media(max-width:480px){html{font-size:16.5px}.nav-bar-main{flex-wrap:nowrap;justify-content:space-between;gap:.5rem}.nav-bar-left,.nav-bar-right{flex:0 0 auto;flex-basis:auto}.nav-bar-center{flex:1 1 auto;order:initial;flex-basis:auto;margin-bottom:0;min-width:0}.nav-bar-title{font-size:1.2rem}.nav-back-btn{padding:.5rem .75rem}.exam-footer{flex-wrap:wrap;gap:.5rem;justify-content:center}.exam-footer>.btn{flex-basis:45%}.floating-notes-panel{width:100%}.floating-notes-toggle-btn.open{transform:translateY(-50%) translate(-100vw)}.chat-input-area{flex-wrap:nowrap}.chat-input-area input{min-width:0}.chat-input-area button{padding:.75rem;flex-shrink:0}.question-container{padding:1.5rem 1rem}.option-btn{padding:.8rem;font-size:.95rem}.exam-results-footer{gap:.5rem}.exam-results-footer .btn{flex:1;padding-left:.5rem;padding-right:.5rem;font-size:.9rem}@media(max-width:768px){.modal-content.exam-review-panel{max-height:80vh;width:95%;overflow-y:scroll}}.floating-ref-btn{position:fixed;top:calc(50% + 70px);right:0;transform:translateY(-50%);background-color:var(--info-color, #17a2b8);color:#fff;border:none;border-radius:8px 0 0 8px;padding:.8rem .65rem;cursor:pointer;font-size:1.5rem;z-index:1008;box-shadow:-2px 2px 6px #00000026;transition:transform .3s cubic-bezier(.25,.8,.25,1),box-shadow .3s ease,background-color .3s ease;display:flex;align-items:center;justify-content:center}.floating-ref-btn:hover{transform:translateY(-50%) translate(-5px);box-shadow:-4px 4px 12px #00000040;filter:brightness(1.1)}.floating-ref-btn:active{transform:translateY(-50%) translate(0);box-shadow:-1px 1px 3px #0003}@media(max-width:768px){.floating-ref-btn{padding:.6rem .5rem;font-size:1.25rem;top:calc(50% + 60px);opacity:.9}}}