: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:#fffffff0;backdrop-filter:blur(16px) saturate(180%);-webkit-backdrop-filter:blur(16px) saturate(180%);padding:0 1.5rem;border-bottom:1px solid rgba(226,232,240,.8);box-shadow:0 10px 25px -5px #0f172a0d,0 8px 10px -6px #0f172a08;position:fixed;top:0;left:0;width:100%;z-index:1000;height:var(--header-height);display:flex;justify-content:center;align-items:center}.header:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#0284c7,#38bdf8,#0369a1)}.header-content{max-width:1050px;margin:0 auto;width:100%;display:flex;justify-content:space-between;align-items:center;height:100%}.header-title-container{display:flex;align-items:center;gap:12px;transition:transform .2s ease}.header-title-container:hover{transform:translateY(-1px)}.header-logo-badge{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,#0284c7,#0369a1);display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px #0284c740;flex-shrink:0;transition:all .3s ease}.header-title-container:hover .header-logo-badge{box-shadow:0 6px 16px #0284c761;transform:scale(1.04) rotate(-3deg)}.header-logo-icon{font-size:1.4rem;line-height:1}.header-title{text-align:left}.header-brand-row{display:flex;align-items:center;gap:8px}.header h1{margin:0;background:linear-gradient(135deg,#0284c7,#0369a1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-size:1.6rem;font-weight:800;letter-spacing:-.03em;line-height:1.1}.header h1 sup{font-size:.85rem;vertical-align:super;background:linear-gradient(135deg,#eab308,#ca8a04);-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-weight:900;margin-left:1px}.header-amc-tag{background:#f0f9ff;color:#0369a1;border:1px solid #bae6fd;font-size:.65rem;font-weight:700;padding:2px 7px;border-radius:9999px;letter-spacing:.05em;text-transform:uppercase}.header p{margin:.15rem 0 0;color:#64748b;font-size:.78rem;text-align:left;font-weight:500}.header p a{color:#0284c7;font-weight:600;text-decoration:none;transition:color .15s ease}.header p a:hover{color:#0369a1;text-decoration:underline}.heart-icon{display:inline-block;transition:transform .2s ease}.header p:hover .heart-icon{transform:scale(1.25)}.header-user-area{position:relative;display:flex;align-items:center;gap:12px}.user-profile{position:relative;display:flex;align-items:center;gap:10px}.header-tier-pill{cursor:pointer;-webkit-user-select:none;user-select:none;transition:transform .15s ease}.header-tier-pill:hover{transform:scale(1.05)}.badge-shield{display:inline-flex;align-items:center;gap:4px;font-size:.72rem;font-weight:700;padding:4px 10px;border-radius:9999px;letter-spacing:.02em;box-shadow:0 2px 6px #0000000a}.badge-admin{background:linear-gradient(135deg,#f3e8ff,#e9d5ff);color:#7e22ce;border:1px solid #d8b4fe}.badge-trial{background:linear-gradient(135deg,#fefce8,#fef08a);color:#854d0e;border:1px solid #fde047}.badge-pro{background:linear-gradient(135deg,#f0fdf4,#dcfce7);color:#15803d;border:1px solid #86efac}.avatar-wrapper{position:relative;cursor:pointer;display:inline-block}.user-avatar{width:44px;height:44px;border-radius:50%;cursor:pointer;border:2px solid #0284c7;box-shadow:0 0 0 3px #0284c726;transition:all .2s ease;object-fit:cover}.avatar-wrapper:hover .user-avatar{transform:scale(1.05);box-shadow:0 0 0 4px #0284c74d}.status-online-dot{position:absolute;bottom:2px;right:2px;width:11px;height:11px;background-color:#22c55e;border:2px solid #ffffff;border-radius:50%;box-shadow:0 0 0 1px #22c55e4d}.login-btn{background:linear-gradient(135deg,#0284c7,#0369a1);color:#fff;padding:.55rem 1.25rem;border-radius:10px;font-weight:700;font-size:.88rem;border:none;box-shadow:0 4px 12px #0284c740;display:inline-flex;align-items:center;gap:6px;transition:all .2s ease;cursor:pointer}.login-btn:hover{background:linear-gradient(135deg,#0369a1,#075985);transform:translateY(-1px);box-shadow:0 6px 16px #0284c759}.login-btn-icon{font-size:1rem}.user-dropdown{position:absolute;top:54px;right:0;background:#fff;border-radius:16px;box-shadow:0 20px 25px -5px #0f172a1f,0 8px 10px -6px #0f172a14,0 0 0 1px #0f172a0d;z-index:1001;width:270px;overflow:hidden;animation:dropdownSlideIn .2s cubic-bezier(.16,1,.3,1)}@keyframes dropdownSlideIn{0%{opacity:0;transform:translateY(-8px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}.user-info{padding:1rem;background:#f8fafc;border-bottom:1px solid #e2e8f0;text-align:left}.user-info-header{display:flex;align-items:center;gap:10px;margin-bottom:6px}.dropdown-avatar{width:36px;height:36px;border-radius:50%;border:1px solid #cbd5e1}.user-info strong{display:block;font-size:.92rem;color:#0f172a;font-weight:700;line-height:1.2}.user-email-text{display:block;font-size:.78rem;color:#64748b;word-break:break-all;margin-top:2px}.user-sub-badge-row{margin-top:6px}.dropdown-btn{width:100%;padding:.75rem 1rem;text-align:left;background:none;border:none;border-bottom:1px solid #f1f5f9;font-size:.88rem;font-weight:600;color:#334155;cursor:pointer;display:flex;align-items:center;gap:10px;transition:all .15s ease}.dropdown-btn:last-child{border-bottom:none}.dropdown-btn:hover{background-color:#f0f9ff;color:#0284c7;padding-left:1.2rem}.dropdown-btn.highlight-btn{color:#0284c7;background-color:#f0f9ff}.dropdown-btn.highlight-btn:hover{background-color:#e0f2fe}.dropdown-btn.logout-btn:hover{background-color:#fef2f2;color:#ef4444}.dropdown-btn-icon{font-size:1.1rem}.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}.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:#5a6268;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}.btn-text{background:none;color:var(--secondary-color);text-decoration:underline;padding:.5rem}.btn-text:hover{color:var(--text-color)}.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}.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:#5a6268}.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}.standalone-guidelines-card{background:linear-gradient(135deg,#0d3b66,#007bff);color:#fff;border-radius:12px;padding:1.5rem;margin-bottom:2rem;box-shadow:0 6px 18px #007bff40;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease;display:flex;align-items:center;gap:1.5rem}.standalone-guidelines-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #007bff59}.standalone-guidelines-card .icon{font-size:3.5rem;line-height:1}.standalone-guidelines-content{flex:1}.standalone-guidelines-content h3{margin:0 0 .4rem;font-size:1.4rem;font-weight:700;color:#fff}.standalone-guidelines-content p{margin:0 0 .8rem;font-size:.95rem;opacity:.9}.standalone-guidelines-card .progress-bar-container{background-color:#ffffff40;margin-top:.5rem}.standalone-guidelines-card .progress-bar{background-color:#28a745}.section-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin-bottom:2rem}.section-card{background-color:var(--card-bg);border-radius:12px;padding:1.5rem;box-shadow:var(--shadow);border:1px solid var(--border-color);cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;display:flex;flex-direction:column;justify-content:space-between}.section-card:hover{transform:translateY(-5px);box-shadow:0 8px 18px #0000001f;border-color:var(--primary-color)}.section-card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.75rem}.section-card .icon{font-size:2.5rem;line-height:1}.section-card-badge{background-color:#e7f3ff;color:var(--primary-color);font-size:.8rem;font-weight:600;padding:.25rem .65rem;border-radius:20px;white-space:nowrap}.section-weight-badge{background-color:#28a745;color:#fff;font-size:.8rem;font-weight:700;padding:.25rem .65rem;border-radius:20px;white-space:nowrap;letter-spacing:.2px;box-shadow:0 2px 4px #28a74533}.section-card h3{margin:0 0 .4rem;font-size:1.25rem;color:var(--text-color);font-weight:700}.section-card p{margin:0 0 1rem;font-size:.9rem;color:var(--secondary-color);line-height:1.4;flex:1}.section-header-banner{background:var(--card-bg);padding:1.5rem;border-radius:12px;box-shadow:var(--shadow);margin-bottom:1.5rem;display:flex;align-items:center;gap:1.25rem;border-left:5px solid var(--primary-color)}.section-header-banner .icon{font-size:3rem;line-height:1}.section-header-banner h2{margin:0 0 .25rem;font-size:1.5rem;color:var(--text-color)}.section-header-banner p{margin:0;font-size:.95rem;color:var(--secondary-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}.subject-card:hover{transform:translateY(-5px);box-shadow:0 6px 12px #00000026}.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}.progress-bar-container{height:8px;width:100%;background-color:#e9ecef;border-radius:var(--border-radius);overflow:hidden;margin-top:1rem}.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}.topic-item:hover{background-color:#e9ecef}.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)}.question-text{font-size:1.2rem;margin-top:0;margin-bottom:1.5rem;font-weight:500}.options-grid{display:grid;gap:1rem;position:relative}.trial-ended-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background-color:#ffffffe6;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:#f1f3f5;border:2px solid transparent;border-radius:var(--border-radius);cursor:pointer;transition:background-color .2s,border-color .2s}.option-btn:hover:not(:disabled){background-color:#e9ecef}.option-btn:disabled{cursor:default;opacity:1;color:var(--text-color);background-color:#f8f9fa;border-color:transparent}.option-btn.selected{background-color:var(--selected-bg);border-color:var(--primary-color)}.option-btn.correct{background-color:var(--correct-bg);border-color:var(--correct-border);color:var(--correct-border);font-weight:700}.option-btn.incorrect{background-color:var(--incorrect-bg);border-color:var(--incorrect-border);color:var(--incorrect-border)}.explanation{margin-top:1.5rem;padding:1.5rem;background-color:#e7f3ff;border:1px solid #b3d7ff;border-radius:var(--border-radius)}.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:.5;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)}}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.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}.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 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