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@media (min-width:1024px){.header-module__fCHs_W__header{display:none}}.header-module__fCHs_W__header{z-index:60;height:calc(64px + env(safe-area-inset-top));padding-top:env(safe-area-inset-top);-webkit-backdrop-filter:blur(16px);background:#ffffffed;border-bottom:1px solid #0000;align-items:center;gap:.75rem;padding-left:1rem;padding-right:1.25rem;transition:border-color .25s,box-shadow .25s,background .25s;display:flex;position:fixed;top:0;left:0;right:0}.header-module__fCHs_W__scrolled{background:#fffffffa;border-bottom-color:#e2e8f0;box-shadow:0 2px 12px #0000000f}@media (prefers-color-scheme:dark){.header-module__fCHs_W__header{background:#0f172aed}.header-module__fCHs_W__scrolled{background:#0f172afa;border-bottom-color:#ffffff14}}.header-module__fCHs_W__logoLink{-webkit-tap-highlight-color:transparent;flex-shrink:0;align-items:center;text-decoration:none;display:flex}.header-module__fCHs_W__logo{border-radius:6px;width:auto;height:36px;display:block}.header-module__fCHs_W__titleBlock{flex-direction:column;flex:1;justify-content:center;min-width:0;padding:0 .25rem;display:flex}.header-module__fCHs_W__titleMain{font-family:var(--font-heading,inherit);color:#1e293b;white-space:nowrap;text-overflow:ellipsis;letter-spacing:-.01em;font-size:.95rem;font-weight:800;line-height:1.2;overflow:hidden}.header-module__fCHs_W__titleSub{color:#64748b;white-space:nowrap;text-overflow:ellipsis;margin-top:1px;font-size:.65rem;font-weight:500;line-height:1.3;overflow:hidden}
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:root{--color-numeracy:#4338ca;--color-literacy:#059669;--color-warning:#d97706;--color-success:#0d9488;--color-exam:#7c3aed;--color-bg:#f8fafc;--color-dark-bg:#0f172a;--color-card:#fff;--color-text:#1e293b;--color-text-secondary:#475569;--color-border:#e2e8f0;--indigo-50:#eef2ff;--indigo-100:#e0e7ff;--indigo-200:#c7d2fe;--indigo-300:#a5b4fc;--indigo-400:#818cf8;--indigo-500:#6366f1;--indigo-600:#4f46e5;--indigo-700:#4338ca;--indigo-800:#3730a3;--indigo-900:#312e81;--emerald-50:#ecfdf5;--emerald-100:#d1fae5;--emerald-200:#a7f3d0;--emerald-300:#6ee7b7;--emerald-400:#34d399;--emerald-500:#10b981;--emerald-600:#059669;--emerald-700:#047857;--emerald-800:#065f46;--emerald-900:#064e3b;--emerald-950:#022c22;--amber-50:#fffbeb;--amber-100:#fef3c7;--amber-200:#fde68a;--amber-300:#fcd34d;--amber-400:#fbbf24;--amber-500:#f59e0b;--amber-600:#d97706;--amber-700:#b45309;--amber-800:#92400e;--amber-900:#78350f;--teal-50:#f0fdfa;--teal-100:#ccfbf1;--teal-200:#99f6e4;--teal-300:#5eead4;--teal-400:#2dd4bf;--teal-500:#14b8a6;--teal-600:#0d9488;--teal-700:#0f766e;--teal-800:#115e59;--teal-900:#134e4a;--purple-50:#faf5ff;--purple-100:#f3e8ff;--purple-200:#e9d5ff;--purple-300:#d8b4fe;--purple-400:#c084fc;--purple-500:#a855f7;--purple-600:#9333ea;--purple-700:#7c3aed;--purple-800:#6b21a8;--purple-900:#581c87;--rose-50:#fff1f2;--rose-100:#ffe4e6;--rose-200:#fecdd3;--rose-300:#fda4af;--rose-400:#fb7185;--rose-500:#f43f5e;--rose-600:#e11d48;--rose-700:#be123c;--rose-800:#9f1239;--rose-900:#881337;--rose-950:#4c0519;--cyan-50:#ecfeff;--cyan-100:#cffafe;--cyan-200:#a5f3fc;--cyan-300:#67e8f9;--cyan-400:#22d3ee;--cyan-500:#06b6d4;--cyan-600:#0891b2;--cyan-700:#0e7490;--cyan-800:#155e75;--cyan-900:#164e63;--slate-50:#f8fafc;--slate-100:#f1f5f9;--slate-200:#e2e8f0;--slate-300:#cbd5e1;--slate-400:#94a3b8;--slate-500:#64748b;--slate-600:#475569;--slate-700:#334155;--slate-800:#1e293b;--slate-900:#0f172a;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;--radius-sm:6px;--radius-md:12px;--radius-lg:20px;--radius-full:9999px;--shadow-sm:0 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0}}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-10px)}to{transform:translateY(0)}}.floating-calc{-webkit-backdrop-filter:blur(20px);border:1px solid var(--color-border);border-radius:var(--radius-lg);width:280px;box-shadow:var(--shadow-xl);z-index:9999;transition:opacity var(--transition-fast);background:#ffffffd9;flex-direction:column;display:flex;position:fixed;top:100px;right:40px;overflow:hidden}.floating-calc__header{background:linear-gradient(135deg, var(--color-numeracy), var(--indigo-900));color:#fff;padding:var(--space-3) var(--space-4);cursor:move;font-family:var(--font-heading);font-weight:600;font-size:var(--text-sm);-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;display:flex}.floating-calc__close{color:#fffc;cursor:pointer;transition:color var(--transition-fast);background:0 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#00000008;font-weight:600}.calc-btn:hover{background:var(--slate-100)}.calc-btn:active{transform:scale(.95)}.calc-btn--operator{background:var(--indigo-50);color:var(--color-numeracy)}.calc-btn--operator:hover{background:var(--indigo-100)}.calc-btn--action{background:var(--slate-100);color:var(--slate-700)}.calc-btn--action:hover{background:var(--slate-200)}.calc-btn--equals{background:var(--color-numeracy);color:#fff;grid-column:span 1}.calc-btn--equals:hover{background:var(--indigo-600)}.exam-timer{align-items:center;gap:var(--space-3);background:var(--color-card);border:1px solid var(--color-border);padding:var(--space-2) var(--space-4);border-radius:var(--radius-full);box-shadow:var(--shadow-sm);transition:all 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var(--space-3);font-size:var(--text-sm);cursor:pointer;transition:all var(--transition-fast);font-weight:600}.practice-calc-toggle:hover{background:var(--color-numeracy);color:#fff}.practice-nav-grid{flex-wrap:wrap;gap:6px;max-width:680px;padding:4px;display:flex}.practice-nav-dot{border-radius:var(--radius-sm);background:var(--slate-100);width:32px;height:32px;color:var(--color-text-secondary);border:1px solid var(--color-border);font-size:var(--text-xs);cursor:pointer;transition:all 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(max-width:768px){.practice-layout{flex-direction:column;height:auto;overflow:visible}.practice-left{border-right:none;border-bottom:1px solid var(--color-border);max-height:400px}.practice-header{gap:var(--space-3);flex-direction:column;align-items:flex-start}.practice-header__utilities{justify-content:space-between;width:100%}.practice-nav-grid{max-width:100%}}.results-tab{border-radius:var(--radius-full);border:1.5px solid var(--color-border);background:var(--color-card);color:var(--color-text-secondary);font-size:var(--text-sm);cursor:pointer;transition:all var(--transition-fast);align-items:center;gap:6px;padding:8px 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print{html,body{color:#000!important;background:#fff!important;font-size:12pt!important}.sidebar,.menu-toggle,.theme-toggle,.floating-calc,.exam-timer__btn,.practice-header,.quiz__nav,.chapter-end__tabs,.welcome-page__cta,.sidebar__footer{display:none!important}.main-content{width:100%!important;margin-left:0!important;padding:0!important}.page-content{max-width:100%!important;padding:0!important}.chapter{page-break-after:always}.chapter__section{page-break-inside:avoid;margin-bottom:var(--space-8)!important;padding-top:var(--space-4)!important;border:none!important}.concept-card,.worked-example,.callout-box,.formula-card{page-break-inside:avoid;box-shadow:none!important;margin-bottom:var(--space-4)!important;background:#fff!important;border:1px solid #ccc!important}.quiz__option{border:1px solid #ddd!important}.quiz__feedback{opacity:1!important;background:#f9f9f9!important;border-left:3px solid #333!important;display:block!important}}.study-dashboard{background:linear-gradient(135deg, var(--slate-900), var(--indigo-900));color:#fff;border-radius:var(--radius-lg);margin:var(--space-8) 0 var(--space-12);box-shadow:var(--shadow-lg);padding:clamp(1.5rem,4vw,2.5rem)}.study-dashboard__intro{max-width:650px}.study-dashboard__eyebrow{color:var(--indigo-200);font-weight:700;font-size:var(--text-xs);letter-spacing:.12em}.study-dashboard h2{color:#fff;margin:var(--space-2) 0;font-size:clamp(1.6rem,3vw,2.25rem)}.study-dashboard p{color:var(--slate-300);margin:0;line-height:1.65}.study-dashboard__metrics{gap:var(--space-3);margin:var(--space-6) 0;grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.study-dashboard__metric{padding:var(--space-4);border-radius:var(--radius-md);background:#ffffff17;border:1px solid #ffffff24}.study-dashboard__metric strong{font-size:var(--text-2xl);color:#fff;font-family:var(--font-heading);display:block}.study-dashboard__metric span{color:var(--indigo-100);font-size:var(--text-sm);margin-top:3px;display:block}.study-dashboard__actions{align-items:center;gap:var(--space-4);flex-wrap:wrap;display:flex}.study-dashboard__actions .welcome-page__cta--primary{color:var(--indigo-800);background:#fff}.study-dashboard__text-link{color:var(--indigo-100);font-size:var(--text-sm);text-underline-offset:3px;font-weight:600;text-decoration:underline}.study-dashboard__text-link:hover{color:#fff}.prep-path{gap:var(--space-4);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.prep-path__step{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-5);box-shadow:var(--shadow-sm)}.prep-path__step span{color:var(--color-numeracy);background:var(--indigo-50);border-radius:var(--radius-full);font-weight:700;font-size:var(--text-xs);padding:3px 8px;display:inline-flex}.prep-path__step h3{margin:var(--space-3) 0 var(--space-2);font-size:var(--text-lg)}.prep-path__step p{color:var(--color-text-secondary);font-size:var(--text-sm);margin:0;line-height:1.6}.welcome-page__official-note{margin-top:var(--space-6);padding:var(--space-4) var(--space-5);border-left:4px solid var(--color-exam);background:var(--purple-50);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--color-text-secondary);line-height:1.6}.welcome-page__official-note strong{color:var(--color-text)}.welcome-page__official-note a{color:var(--purple-600);text-underline-offset:2px;font-weight:700;text-decoration:underline}.progress-tracker__checklist{gap:var(--space-3);margin:var(--space-5) 0 0;grid-template-columns:repeat(2,minmax(0,1fr));padding:0;list-style:none;display:grid}.progress-tracker__checklist li{align-items:flex-start;gap:var(--space-2);font-size:var(--text-sm);color:var(--color-text-secondary);display:flex}.progress-tracker__checklist input{accent-color:var(--color-numeracy);margin-top:.2rem}@media (max-width:700px){.study-dashboard__metrics,.prep-path,.progress-tracker__checklist{grid-template-columns:1fr}.study-dashboard__actions{flex-direction:column;align-items:flex-start}}body:has(.practice-page) .page-content{max-width:100%!important;margin:0!important;padding:0!important}@media (max-width:480px){.floating-calc{inset:50% auto auto 50%!important;transform:translate(-50%,-50%)!important;box-shadow:0 10px 25px #00000040!important}}@media (max-width:1023px){.menu-toggle{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);justify-content:center;align-items:center;border:1px solid var(--color-border)!important;box-shadow:var(--shadow-md)!important;width:46px!important;height:46px!important;top:var(--space-4)!important;right:var(--space-4)!important;z-index:var(--z-modal)!important;background:#ffffffd9!important;border-radius:50%!important;display:flex!important;position:fixed!important}[data-theme=dark] .menu-toggle{border-color:var(--slate-700)!important;background:#1e293bd9!important}}body:has(.sidebar--open) .main-content:after{content:"";-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:35;pointer-events:auto;background:#0f172a66;position:fixed;inset:0}
.skip-link{top:-60px;left:var(--space-4);background:var(--color-numeracy,#4338ca);color:#fff;border-radius:0 0 var(--radius-sm) var(--radius-sm);z-index:99999;transition:top var(--transition-fast) ease-out;padding:8px 16px;font-weight:700;text-decoration:none;position:absolute}.skip-link:focus{top:0!important}.sidebar{-webkit-backdrop-filter:blur(16px);border-right:1px solid var(--color-border);width:280px;height:100vh;z-index:var(--z-overlay);transition:transform var(--transition-base);background:#ffffffb3;flex-direction:column;display:flex;position:fixed;top:0;left:0;overflow-y:auto}.sidebar__header{padding:var(--space-6);border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;display:flex}.sidebar__logo{align-items:center;gap:var(--space-3);display:flex}.sidebar__logo-icon{font-size:1.5rem}.sidebar__logo-text{flex-direction:column;display:flex}.sidebar__title{font-family:var(--font-heading);font-size:var(--text-xl);color:var(--color-text);margin:0;font-weight:700}.sidebar__subtitle{font-size:var(--text-xs);color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.05em;margin:0}.sidebar__nav{padding:var(--space-4);flex:1}.sidebar__nav-part{margin-bottom:var(--space-6)}.sidebar__nav-part-title{font-size:var(--text-xs);color:var(--color-text-secondary);margin-bottom:var(--space-2);padding-left:var(--space-3);text-transform:uppercase;font-weight:700}.sidebar__nav-item{align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);color:var(--color-text-secondary);transition:all var(--transition-fast);margin-bottom:var(--space-1);font-weight:500;display:flex}.sidebar__nav-item:hover{background-color:var(--slate-100);color:var(--color-text)}.sidebar__nav-item--active{background-color:var(--indigo-50);color:var(--color-numeracy);font-weight:600}.sidebar__nav-item--active.sidebar__nav-item--literacy{background-color:var(--emerald-50);color:var(--color-literacy)}.sidebar__nav-icon{flex-shrink:0;font-size:1rem}.sidebar__nav-text{font-size:var(--text-sm);text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.sidebar__nav-number{margin-right:2px;font-weight:700}.sidebar__nav-dot{border-radius:50%;flex-shrink:0;width:8px;height:8px}.sidebar__nav-list{gap:var(--space-1);flex-direction:column;display:flex}.sidebar__footer{padding:var(--space-4);border-top:1px solid var(--color-border);justify-content:space-between;align-items:center;display:flex}.theme-toggle{cursor:pointer;color:var(--color-text-secondary);padding:var(--space-2);border-radius:var(--radius-full);transition:background var(--transition-fast);background:0 0;border:none}.theme-toggle:hover{background-color:var(--slate-100);color:var(--color-text)}.menu-toggle{cursor:pointer;padding:var(--space-2);z-index:var(--z-modal);background:0 0;border:none;display:none}.main-content{min-height:100vh;transition:margin var(--transition-base);box-sizing:border-box;width:100%;max-width:100%;margin-left:0}@media (min-width:1024px){.main-content{margin-left:280px}}.page-content{box-sizing:border-box;width:100%;padding:1.25rem 1rem 1.5rem}@media (min-width:1024px){.page-content{max-width:960px;padding:var(--space-8) var(--space-6) 120px var(--space-6);margin:0 auto}}.chapter-header{background:linear-gradient(135deg, var(--indigo-600), var(--purple-600));border-radius:var(--radius-lg);padding:var(--space-8);color:#fff;margin-bottom:var(--space-10);box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.chapter-header:before{content:"";background:radial-gradient(circle,#ffffff1a 0%,#fff0 70%);border-radius:50%;width:400px;height:400px;position:absolute;top:-50%;right:-20%}.concept-card{background:var(--color-card);border-radius:var(--radius-md);box-shadow:var(--shadow-md);border:1px solid var(--color-border);transition:transform var(--transition-fast), box-shadow var(--transition-fast);margin-bottom:var(--space-6);overflow:hidden}.concept-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.worked-example{background:var(--color-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);border:1px solid var(--slate-200);padding:var(--space-6);margin-bottom:var(--space-8);transition:transform var(--transition-fast), box-shadow var(--transition-fast)}.worked-example:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.worked-example__header{align-items:center;gap:var(--space-3);margin-bottom:var(--space-4);border-bottom:1px solid var(--slate-100);padding-bottom:var(--space-3);display:flex}.worked-example__badge{background:var(--indigo-600);color:#fff;padding:var(--space-1) var(--space-3);border-radius:var(--radius-sm);font-family:var(--font-heading);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.05em;font-weight:700}.worked-example__title{font-family:var(--font-heading);font-size:var(--text-lg);color:var(--color-text);margin:0;font-weight:700}.worked-example__problem{font-family:var(--font-body);font-size:var(--text-base);color:var(--color-text);background:var(--slate-50);padding:var(--space-4);border-radius:var(--radius-md);margin-bottom:var(--space-5);border-left:4px solid var(--color-numeracy);line-height:var(--leading-normal)}.worked-example__steps{gap:var(--space-4);margin-bottom:var(--space-5);flex-direction:column;display:flex}.worked-example__step{gap:var(--space-4);align-items:flex-start;display:flex}.worked-example__step-number{background-color:var(--indigo-50);width:28px;height:28px;color:var(--color-numeracy);font-weight:700;font-family:var(--font-heading);font-size:var(--text-sm);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;margin-top:2px;display:flex}.worked-example__step-content{font-family:var(--font-body);font-size:var(--text-base);color:var(--color-text);line-height:var(--leading-normal);flex:1}.worked-example__step-annotation{margin-top:var(--space-2);padding:var(--space-2) var(--space-3);background:var(--slate-50);border:1px solid var(--slate-100);border-radius:var(--radius-sm);font-size:var(--text-sm)}.worked-example__answer{font-family:var(--font-body);font-size:var(--text-base);background:var(--emerald-50);color:var(--emerald-900);padding:var(--space-4);border-radius:var(--radius-md);border:1px solid var(--emerald-200);margin-bottom:var(--space-4);font-weight:700}.comparison-table{border-collapse:collapse;width:100%;margin-bottom:var(--space-6);background:var(--color-card);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);overflow:hidden}.comparison-table th{background-color:var(--slate-50);padding:var(--space-4);text-align:left;border-bottom:2px solid var(--slate-200);font-weight:600}.comparison-table td{padding:var(--space-4);border-bottom:1px solid var(--slate-100)}.comparison-table tr:hover td{background-color:var(--slate-50)}.formula-card{background:var(--indigo-50);border-left:4px solid var(--color-numeracy);padding:var(--space-6);border-radius:var(--radius-md);margin-bottom:var(--space-6)}.formula-card__title{font-family:var(--font-heading);font-size:var(--text-lg);margin:0 0 var(--space-2) 0;color:var(--indigo-900);font-weight:700}.formula-card__display{font-family:var(--font-code);font-size:var(--text-xl);color:var(--color-numeracy);background:var(--color-card);padding:var(--space-4);border-radius:var(--radius-sm);text-align:center;margin:var(--space-3) 0;box-shadow:var(--shadow-sm);font-weight:700}.formula-card__variables{font-family:var(--font-body);font-size:var(--text-sm);color:var(--color-text-secondary);gap:var(--space-1);margin-bottom:var(--space-4);flex-direction:column;display:flex}.formula-card__variable{gap:var(--space-2);align-items:center;display:flex}.formula-card__variable-symbol{font-family:var(--font-code);font-weight:700}.formula-card__example{font-family:var(--font-body);font-size:var(--text-sm);margin-top:var(--space-4);border-top:1px dashed var(--indigo-200);padding-top:var(--space-3)}.formula-card__why{font-family:var(--font-body);font-size:var(--text-sm);margin-top:var(--space-3);cursor:pointer}.formula-card__why-content{padding:var(--space-2) 0 0 0;color:var(--color-text-secondary);line-height:var(--leading-normal)}.visual-summary{gap:var(--space-4);margin-bottom:var(--space-6);grid-template-columns:repeat(auto-fit,minmax(250px,1fr));display:grid}.timeline{gap:var(--space-6);padding:var(--space-4) 0;scroll-snap-type:x mandatory;display:flex;overflow-x:auto}.image-figure{border-radius:var(--radius-md);box-shadow:var(--shadow-md);margin:var(--space-6) 0;overflow:hidden}.image-figure img{width:100%;height:auto;display:block}.progress-tracker{background-color:var(--slate-200);border-radius:var(--radius-full);height:8px;margin:var(--space-4) 0;overflow:hidden}.progress-tracker__fill{background:linear-gradient(90deg, var(--color-numeracy), var(--purple-500));border-radius:var(--radius-full);height:100%;transition:width 1s var(--ease-spring)}.sidebar{transform:translate(-100%)}@media (min-width:1024px){.sidebar{transform:translate(0)}.menu-toggle{display:none!important}}.sidebar--open{transform:translate(0)!important}
.callout-box{gap:var(--space-4);background-color:var(--color-card);border-radius:var(--radius-md);padding:var(--space-5);margin-bottom:var(--space-6);box-shadow:var(--shadow-sm);border:1px solid var(--color-border);transition:transform var(--transition-fast), box-shadow var(--transition-fast);animation:slideUp var(--transition-base) forwards;border-left-width:4px;display:flex}.callout-box:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.callout-box__icon{width:40px;height:40px;font-size:var(--text-xl);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex}.callout-box__content{flex:1}.callout-box__title{font-family:var(--font-heading);font-size:var(--text-base);margin-bottom:var(--space-1);font-weight:700}.callout-box__text{font-size:var(--text-sm);color:var(--color-text);line-height:var(--leading-relaxed)}.callout-box--tip{border-left-color:var(--color-success);background-color:var(--teal-50)}.callout-box--tip .callout-box__icon{background-color:var(--teal-100);color:var(--teal-700)}.callout-box--tip .callout-box__title{color:var(--teal-900)}.callout-box--mistake{border-left-color:var(--color-warning);background-color:var(--amber-50)}.callout-box--mistake .callout-box__icon{background-color:var(--amber-100);color:var(--amber-700)}.callout-box--mistake .callout-box__title{color:var(--amber-900)}.callout-box--remember{border-left-color:var(--color-numeracy);background-color:var(--indigo-50)}.callout-box--remember .callout-box__icon{background-color:var(--indigo-100);color:var(--indigo-700)}.callout-box--remember .callout-box__title{color:var(--indigo-900)}.callout-box--examiner{border-left-color:var(--color-exam);background-color:var(--purple-50)}.callout-box--examiner .callout-box__icon{background-color:var(--purple-100);color:var(--purple-700)}.callout-box--examiner .callout-box__title{color:var(--purple-900)}.callout-box--shortcut{border-left-color:var(--cyan-500);background-color:var(--cyan-50)}.callout-box--shortcut .callout-box__icon{background-color:var(--cyan-100);color:var(--cyan-700)}.callout-box--shortcut .callout-box__title{color:var(--cyan-900)}.callout-box--strategy{border-left-color:var(--color-exam);background-color:var(--purple-50);border-left-style:dotted}.callout-box--strategy .callout-box__icon{background-color:var(--purple-100);color:var(--purple-700)}.callout-box--before-after{border-left:4px solid #0000;border-image:linear-gradient(to bottom, var(--color-warning), var(--color-success)) 1;background-color:var(--slate-50)}.callout-box--before-after .callout-box__content{gap:var(--space-4);display:flex}.callout-box__col{background:var(--color-card);padding:var(--space-3);border-radius:var(--radius-sm);border:1px solid var(--color-border);flex:1}.callout-box--aussie{border-left-color:var(--color-literacy);background-color:var(--emerald-50);position:relative;overflow:hidden}.callout-box--aussie:after{content:"";background:linear-gradient(135deg, transparent 50%, var(--emerald-200) 50%);opacity:.5;width:60px;height:60px;position:absolute;top:0;right:0}.callout-box--aussie .callout-box__icon{background-color:var(--emerald-100);color:var(--emerald-700)}
.quiz,.interactive-quiz{background:var(--color-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:var(--space-8);margin-bottom:var(--space-8);border:1px solid var(--color-border);transition:box-shadow var(--transition-base);position:relative;overflow:hidden}.quiz:hover,.interactive-quiz:hover{box-shadow:var(--shadow-xl)}.quiz__header,.interactive-quiz__header{margin-bottom:var(--space-6);font-family:var(--font-heading);font-weight:700;font-size:var(--text-sm);color:var(--color-exam,#7c3aed);text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--slate-100);padding-bottom:var(--space-3);justify-content:space-between;align-items:center;display:flex}.quiz__progress,.interactive-quiz__progress{font-size:var(--text-sm);color:var(--color-text-secondary);font-weight:600}.quiz__question,.interactive-quiz__text{font-family:var(--font-body);font-size:var(--text-xl);color:var(--color-text);margin-bottom:var(--space-8);font-weight:700;line-height:var(--leading-snug)}.quiz__question strong,.interactive-quiz__text strong{color:var(--color-numeracy);border-bottom:2px dashed var(--indigo-200)}.quiz__options,.interactive-quiz__options{gap:var(--space-4);margin-bottom:var(--space-8);grid-template-columns:1fr;display:grid}.quiz__option,.interactive-quiz__option{width:100%;min-height:60px;padding:var(--space-4) var(--space-5);background-color:var(--color-card);border:2px solid var(--slate-200);border-radius:var(--radius-md);cursor:pointer;font-family:var(--font-body);font-size:var(--text-base);text-align:left;color:var(--color-text);box-shadow:var(--shadow-sm);outline:none;align-items:center;font-weight:600;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex;position:relative}.quiz__option:hover,.interactive-quiz__option:hover{border-color:var(--indigo-300,#a5b4fc);background-color:var(--indigo-50,#eef2ff);box-shadow:var(--shadow-md);transform:translateY(-2px)}.quiz__option:active,.interactive-quiz__option:active{box-shadow:var(--shadow-sm);transform:translateY(0)}.quiz__option-label,.interactive-quiz__option-label{background-color:var(--slate-50);border:1px solid var(--slate-200);border-radius:var(--radius-sm);width:32px;height:32px;margin-right:var(--space-4);color:var(--color-text-secondary);font-weight:700;font-family:var(--font-heading);flex-shrink:0;justify-content:center;align-items:center;transition:all .2s;display:flex}.quiz__option--selected,.interactive-quiz__option--selected{box-shadow:0 0 0 1px var(--indigo-500) inset, var(--shadow-md);border-color:var(--indigo-500,#6366f1)!important;background-color:var(--indigo-50,#eef2ff)!important;color:var(--indigo-900,#312e81)!important}.quiz__option--selected .quiz__option-label,.interactive-quiz__option--selected .interactive-quiz__option-label{background-color:var(--indigo-500,#6366f1)!important;color:#fff!important;border-color:var(--indigo-500,#6366f1)!important}.quiz__option--correct,.interactive-quiz__option--correct{box-shadow:0 0 0 1px var(--emerald-500) inset, var(--shadow-md);animation:.5s ease-in-out pulseCorrect;border-color:var(--emerald-500,#10b981)!important;background-color:var(--emerald-50,#ecfdf5)!important;color:var(--emerald-900,#064e3b)!important}.quiz__option--correct .quiz__option-label,.interactive-quiz__option--correct .interactive-quiz__option-label{background-color:var(--emerald-500,#10b981)!important;border-color:var(--emerald-500,#10b981)!important;color:#fff!important}.quiz__option--incorrect,.interactive-quiz__option--incorrect{box-shadow:0 0 0 1px var(--rose-500) inset, var(--shadow-md);animation:.4s ease-in-out shakeIncorrect;border-color:var(--rose-500,#ef4444)!important;background-color:var(--rose-50,#fef2f2)!important;color:var(--rose-900,#7f1d1d)!important}.quiz__option--incorrect .quiz__option-label,.interactive-quiz__option--incorrect .interactive-quiz__option-label{background-color:var(--rose-500,#ef4444)!important;border-color:var(--rose-500,#ef4444)!important;color:#fff!important}.quiz__option:disabled,.interactive-quiz__option:disabled{cursor:not-allowed;transform:none!important}.quiz__feedback,.interactive-quiz__feedback{margin-top:var(--space-6);padding:var(--space-5) var(--space-6);border-radius:var(--radius-md);border-left:5px solid var(--slate-300);background:var(--slate-50);line-height:var(--leading-relaxed);font-family:var(--font-body);animation:slideUp var(--transition-base)}.quiz__feedback strong,.interactive-quiz__feedback strong{font-size:var(--text-base);font-family:var(--font-heading);margin-bottom:var(--space-2);display:block}.quiz__feedback--correct,.interactive-quiz__feedback--correct{background-color:var(--emerald-50);border-left-color:var(--emerald-500);color:var(--emerald-950)}.quiz__feedback--incorrect,.interactive-quiz__feedback--incorrect{background-color:var(--rose-50);border-left-color:var(--rose-500);color:var(--rose-950)}.quiz__nav,.interactive-quiz__nav{margin-top:var(--space-6);padding-top:var(--space-6);border-top:1px solid var(--slate-100);justify-content:space-between;align-items:center;gap:var(--space-4);display:flex}.interactive-quiz__btn,.quiz__btn{padding:var(--space-3) 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var(--slate-200);cursor:pointer;background:#fff;font-weight:700;transition:all .2s}.flashcard-deck__btn:hover:not(:disabled){background:var(--slate-50)}.flashcard-deck__btn:disabled{opacity:.5;cursor:not-allowed}.flashcard-deck__dots{justify-content:center;gap:6px;display:flex}.flashcard-deck__dot{background:var(--slate-300);cursor:pointer;border-radius:50%;width:8px;height:8px;transition:background .2s}.flashcard-deck__dot.is-active{background:var(--color-exam)}.exam-checklist__checkbox{border:2px solid var(--slate-300);cursor:pointer;appearance:none;width:24px;height:24px;transition:all var(--transition-fast);background:#fff;border-radius:6px;outline:none;position:relative}.exam-checklist__checkbox:checked{background-color:var(--emerald-500)!important;border-color:var(--emerald-500)!important}.exam-checklist__checkbox:checked:after{content:"✓";color:#fff;font-size:14px;font-weight:700;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}@keyframes 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.chapter{animation:fadeIn var(--transition-slow);position:relative}.chapter__section{padding-left:var(--space-8);margin-bottom:var(--space-12);position:relative}.chapter__section:before{content:"";background:var(--slate-200);border-radius:var(--radius-full);width:4px;transition:background var(--transition-base);position:absolute;top:0;bottom:0;left:0}.chapter__section:hover:before{background:var(--indigo-400)}.chapter__section-heading{font-size:var(--text-2xl);margin-bottom:var(--space-6);color:var(--color-text);font-weight:700}.chapter__section-number{background-color:var(--color-card);border:4px solid var(--indigo-500);width:40px;height:40px;color:var(--indigo-600);box-shadow:var(--shadow-sm);z-index:2;border-radius:50%;justify-content:center;align-items:center;font-weight:700;display:flex;position:absolute;top:0;left:-18px}.chapter__content-chunk{margin-bottom:var(--space-6);line-height:var(--leading-relaxed)}.chapter-header__content{z-index:1;position:relative}.chapter-header__part-label{font-size:var(--text-sm);text-transform:uppercase;letter-spacing:.1em;opacity:.85;margin-bottom:var(--space-3);padding:var(--space-1) var(--space-4);border-radius:var(--radius-full);background:#ffffff26;font-weight:600;display:inline-block}.chapter-header__number-bubble{width:72px;height:72px;font-size:var(--text-3xl);font-weight:700;font-family:var(--font-heading);margin-bottom:var(--space-4);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#fff3;border:3px solid 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var(--transition-fast);font-weight:500;font-size:var(--text-sm)}.chapter-end__tab:hover{background:var(--slate-100);transform:translateY(-1px)}.chapter-end__tab--active{background:var(--indigo-600);color:#fff;border-color:var(--indigo-600);box-shadow:var(--shadow-md)}.chapter-end__panel{background:var(--color-card);border-radius:var(--radius-md);padding:var(--space-6);box-shadow:var(--shadow-sm);animation:scaleIn var(--transition-fast);display:none}.chapter-end__panel--active{display:block}.chapter__checklist{background:var(--color-card);border-radius:var(--radius-md);padding:var(--space-6);margin-top:var(--space-6);border:1px solid var(--slate-200)}.chapter__checklist h3{margin-bottom:var(--space-4);font-size:var(--text-xl)}.chapter__checklist ul{padding:0;list-style:none}.chapter__checklist li{margin-bottom:var(--space-3)}.chapter__checklist label{align-items:center;gap:var(--space-3);cursor:pointer;padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);transition:background var(--transition-fast);display:flex}.chapter__checklist label:hover{background:var(--slate-50)}.chapter__checklist input[type=checkbox]{width:20px;height:20px;accent-color:var(--color-numeracy);cursor:pointer}.welcome-page{padding:0;animation:.5s ease-out fadeIn}.welcome-page__hero{background:linear-gradient(135deg, var(--indigo-700), var(--purple-700), var(--indigo-800));border-radius:var(--radius-lg);padding:var(--space-16) var(--space-8);text-align:center;color:#fff;margin-bottom:var(--space-12);position:relative;overflow:hidden;box-shadow:0 20px 60px -12px #4338ca66}.welcome-page__hero:before{content:"";pointer-events:none;background:radial-gradient(circle,#ffffff14 0%,#0000 70%);border-radius:50%;width:600px;height:600px;position:absolute;top:-50%;right:-25%}.welcome-page__hero:after{content:"";pointer-events:none;background:radial-gradient(circle,#7c3aed4d 0%,#0000 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#00000026}.welcome-page__cta--primary:hover{color:var(--indigo-800);transform:translateY(-2px);box-shadow:0 8px 30px #0003}.welcome-page__cta--secondary{background:var(--color-bg-card,#fff);color:var(--color-text,#1e293b);border:1px solid var(--color-slate-300,#cbd5e1);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.welcome-page__cta--secondary:hover{background:var(--color-slate-50,#f8fafc);color:var(--color-text,#1e293b);border-color:var(--color-slate-400,#94a3b8);transform:translateY(-2px)}.welcome-page__hero .welcome-page__cta--secondary{color:#fff;background:#ffffff26;border:1px solid #ffffff4d}.welcome-page__hero .welcome-page__cta--secondary:hover{color:#fff;background:#ffffff40;border-color:#ffffff80}.welcome-page__section{margin-bottom:var(--space-12);padding:0 var(--space-2)}.welcome-page__section--cta{text-align:center;padding:var(--space-10);background:linear-gradient(135deg, var(--slate-50), var(--indigo-50));border-radius:var(--radius-lg);border:1px solid var(--indigo-100)}.welcome-page__section-title{font-size:var(--text-2xl);margin-bottom:var(--space-6);align-items:center;gap:var(--space-3);font-weight:700;display:flex}.welcome-page__section-icon{font-size:1.5em}.welcome-page__section-desc{color:var(--color-text-secondary);max-width:700px;margin-bottom:var(--space-8);line-height:var(--leading-relaxed)}.welcome-page__info-grid{gap:var(--space-6);grid-template-columns:repeat(auto-fit,minmax(240px,1fr));display:grid}.welcome-page__info-card{background:var(--color-card);border-radius:var(--radius-md);padding:var(--space-6);border:1px solid var(--slate-200);transition:all var(--transition-fast);box-shadow:var(--shadow-sm)}.welcome-page__info-card:hover{box-shadow:var(--shadow-lg);border-color:var(--indigo-200);transform:translateY(-4px)}.welcome-page__info-icon{margin-bottom:var(--space-3);font-size:2rem}.welcome-page__info-card h3{font-size:var(--text-lg);margin-bottom:var(--space-2)}.welcome-page__info-card p{font-size:var(--text-sm);line-height:var(--leading-relaxed)}.welcome-page__parts-grid{gap:var(--space-8);grid-template-columns:repeat(auto-fit,minmax(320px,1fr));display:grid}.welcome-page__part{background:var(--color-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);border:1px solid var(--slate-200);transition:transform var(--transition-fast);overflow:hidden}.welcome-page__part:hover{box-shadow:var(--shadow-xl);transform:translateY(-4px)}.welcome-page__part-header{padding:var(--space-6);color:#fff}.welcome-page__part--numeracy .welcome-page__part-header{background:linear-gradient(135deg, var(--indigo-600), var(--purple-600))}.welcome-page__part--literacy .welcome-page__part-header{background:linear-gradient(135deg, var(--emerald-600), var(--teal-600))}.welcome-page__part-label{font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.15em;opacity:.8;margin-bottom:var(--space-1);display:block}.welcome-page__part-header h3{font-size:var(--text-xl);color:#fff;margin-bottom:var(--space-1)}.welcome-page__part-chapters{font-size:var(--text-sm);opacity:.8}.welcome-page__chapter-list{padding:var(--space-4) var(--space-6);list-style:none}.welcome-page__chapter-list li{margin-bottom:var(--space-2)}.welcome-page__chapter-list a{align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-sm);color:var(--color-text);transition:all var(--transition-fast);font-weight:500;text-decoration:none;display:flex}.welcome-page__chapter-list a:hover{background:var(--slate-50);color:var(--color-numeracy);transform:translate(4px)}.welcome-page__part--literacy .welcome-page__chapter-list 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