:root{--primary:#1e3a8a;--primary-dark:#0f172a;--primary-light:#3b82f6;--secondary:#d97706;--secondary-light:#fef3c7;--accent-gold:#f59e0b;--accent-emerald:#059669;--accent-red:#dc2626;--bg-main:#f8fafc;--bg-card:#fff;--bg-subtle:#f1f5f9;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--border-color:#e2e8f0;--border-focus:#3b82f6;--shadow-sm:0 1px 3px #0000000d;--shadow-md:0 4px 6px -1px #00000012, 0 2px 4px -2px #0000000d;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -4px #0000000a;--shadow-glow:0 0 20px #3b82f640;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--transition:all .25s cubic-bezier(.4, 0, .2, 1)}[data-theme=dark]{--bg-main:#0b0f19;--bg-card:#131c2e;--bg-subtle:#1e293b;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-muted:#64748b;--border-color:#273549;--shadow-sm:0 1px 3px #0000004d;--shadow-md:0 4px 12px #0006}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-main);color:var(--text-primary);min-height:100vh;font-family:Plus Jakarta Sans,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6}#root{flex-direction:column;min-height:100vh;display:flex}.top-header{color:#fff;z-index:100;background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 60%,#172554 100%);padding:.75rem 1.5rem;position:sticky;top:0;box-shadow:0 4px 20px #0f172a26}.header-container{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;max-width:1300px;margin:0 auto;display:flex}.brand-badge{color:inherit;cursor:pointer;align-items:center;gap:.85rem;text-decoration:none;display:flex}.brand-logo-icon{background:linear-gradient(135deg,#f59e0b,#d97706);border-radius:12px;justify-content:center;align-items:center;width:44px;height:44px;font-size:1.4rem;display:flex;box-shadow:0 4px 10px #f59e0b66}.brand-text h1{letter-spacing:-.02em;background:linear-gradient(90deg,#fff,#fef08a);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.15rem;font-weight:800}.brand-text p{color:#93c5fd;font-size:.75rem;font-weight:500}.nav-tabs-wrapper{border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffff14;gap:.4rem;padding:.3rem;display:flex}.nav-tab-btn{color:#e2e8f0;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);background:0 0;border:none;align-items:center;gap:.5rem;padding:.5rem .95rem;font-size:.85rem;font-weight:600;display:flex}.nav-tab-btn:hover{color:#fff;background:#ffffff26}.nav-tab-btn.active{color:var(--primary);box-shadow:var(--shadow-sm);background:#fff}[data-theme=dark] .nav-tab-btn.active{background:var(--primary-light);color:#fff}.header-actions{align-items:center;gap:.5rem;display:flex}.btn-icon{color:#fff;border-radius:var(--radius-md);cursor:pointer;width:38px;height:38px;transition:var(--transition);background:#ffffff1a;border:1px solid #ffffff26;justify-content:center;align-items:center;display:flex}.btn-icon:hover{background:#ffffff40;transform:translateY(-1px)}.main-wrapper{flex:1;width:100%;max-width:1300px;margin:1.5rem auto;padding:0 1rem}.tab-pane{animation:.3s forwards fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.book-hero-card{border-radius:var(--radius-xl);color:#fff;box-shadow:var(--shadow-lg);background:linear-gradient(135deg,#1e3a8a 0%,#1e293b 100%);grid-template-columns:280px 1fr;align-items:center;gap:2.5rem;margin-bottom:2rem;padding:2.5rem;display:grid;position:relative;overflow:hidden}.book-hero-card:after{content:"";pointer-events:none;background:radial-gradient(circle,#f59e0b33 0%,#0000 70%);width:350px;height:350px;position:absolute;top:-40%;right:-10%}.cover-wrapper{perspective:1000px;position:relative}.cover-image{border-radius:var(--radius-lg);width:100%;transition:transform .4s;transform:rotateY(-8deg)rotateX(2deg);box-shadow:-8px 12px 30px #00000080,0 0 0 1px #ffffff1a}.cover-image:hover{transform:rotateY(0)rotateX(0)scale(1.02)}.hero-info{z-index:1}.hero-pill{color:#fef08a;text-transform:uppercase;letter-spacing:.05em;background:#f59e0b33;border:1px solid #f59e0b66;border-radius:9999px;align-items:center;gap:.4rem;margin-bottom:1rem;padding:.35rem .85rem;font-size:.8rem;font-weight:700;display:inline-flex}.hero-title{background:linear-gradient(90deg,#fff,#e0e7ff);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:.85rem;font-size:2rem;font-weight:800;line-height:1.25}.hero-desc{color:#cbd5e1;max-width:650px;margin-bottom:1.5rem;font-size:.95rem}.hero-badges-row{flex-wrap:wrap;gap:.75rem;margin-bottom:1.5rem;display:flex}.badge-item{border-radius:var(--radius-md);background:#ffffff1a;border:1px solid #ffffff26;align-items:center;gap:.4rem;padding:.4rem .85rem;font-size:.8rem;font-weight:600;display:flex}.hero-btn-group{flex-wrap:wrap;gap:.85rem;display:flex}.btn-primary{color:#0f172a;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);background:linear-gradient(135deg,#f59e0b,#d97706);border:none;align-items:center;gap:.5rem;padding:.75rem 1.4rem;font-weight:700;display:inline-flex;box-shadow:0 4px 14px #d9770659}.btn-primary:hover{background:linear-gradient(135deg,#fbbf24,#f59e0b);transform:translateY(-2px);box-shadow:0 6px 20px #d9770680}.btn-secondary{color:#fff;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);background:#ffffff1f;border:1px solid #fff3;align-items:center;gap:.5rem;padding:.75rem 1.4rem;font-weight:600;display:inline-flex}.btn-secondary:hover{background:#ffffff38;transform:translateY(-2px)}.section-header{justify-content:space-between;align-items:flex-end;margin-bottom:1.25rem;display:flex}.section-header h2{color:var(--text-primary);align-items:center;gap:.5rem;font-size:1.4rem;font-weight:800;display:flex}.section-header p{color:var(--text-secondary);font-size:.9rem}.kisi-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem;margin-bottom:2.5rem;display:grid}.kisi-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:var(--transition);flex-direction:column;padding:1.5rem;display:flex}.kisi-card:hover{box-shadow:var(--shadow-md);border-color:var(--primary-light);transform:translateY(-4px)}.kisi-card-header{justify-content:space-between;align-items:flex-start;margin-bottom:1rem;display:flex}.kisi-icon{border-radius:var(--radius-md);justify-content:center;align-items:center;width:44px;height:44px;font-size:1.3rem;display:flex}.kisi-icon.twk{color:#dc2626;background:#fee2e2}.kisi-icon.tiu{color:#4338ca;background:#e0e7ff}.kisi-icon.tkp{color:#d97706;background:#fef3c7}.kisi-icon.skb{color:#059669;background:#dcfce7}.kisi-pg-badge{background:var(--bg-subtle);border:1px solid var(--border-color);color:var(--text-secondary);border-radius:9999px;padding:.3rem .6rem;font-size:.75rem;font-weight:700}.kisi-card h3{margin-bottom:.4rem;font-size:1.1rem;font-weight:700}.kisi-card p{color:var(--text-secondary);flex:1;margin-bottom:1rem;font-size:.85rem}.kisi-list{color:var(--text-secondary);border-top:1px dashed var(--border-color);margin-bottom:1rem;padding-top:.75rem;font-size:.8rem;list-style:none}.kisi-list li{margin-bottom:.4rem;padding-left:1.1rem;position:relative}.kisi-list li:before{content:"✔";color:var(--accent-emerald);font-size:.75rem;position:absolute;left:0}.materi-container{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);grid-template-columns:320px 1fr;gap:1.5rem;margin-bottom:2.5rem;display:grid;overflow:hidden}.materi-sidebar{background:var(--bg-subtle);border-right:1px solid var(--border-color);padding:1.25rem}.materi-sidebar h4{color:var(--text-primary);margin-bottom:.75rem;font-size:.95rem;font-weight:700}.materi-nav-list{flex-direction:column;gap:.4rem;list-style:none;display:flex}.materi-nav-btn{text-align:left;border-radius:var(--radius-md);width:100%;color:var(--text-secondary);cursor:pointer;transition:var(--transition);background:0 0;border:none;justify-content:space-between;align-items:center;padding:.75rem .85rem;font-size:.85rem;font-weight:600;display:flex}.materi-nav-btn:hover{color:var(--primary);background:#0000000a}[data-theme=dark] .materi-nav-btn:hover{background:#ffffff0d}.materi-nav-btn.active{background:var(--primary);color:#fff;box-shadow:0 4px 10px #1e3a8a40}.materi-content-area{max-height:700px;padding:2rem;overflow-y:auto}.materi-content-area h3{color:var(--text-primary);margin-bottom:.5rem;font-size:1.5rem;font-weight:800}.materi-meta-tag{background:var(--secondary-light);color:var(--secondary);border-radius:9999px;margin-bottom:1.25rem;padding:.2rem .6rem;font-size:.75rem;font-weight:700;display:inline-block}.materi-body{color:var(--text-secondary);font-size:.95rem;line-height:1.8}.materi-body h4{color:var(--text-primary);margin-top:1.5rem;margin-bottom:.75rem;font-size:1.15rem;font-weight:700}.materi-body ul,.materi-body ol{margin-bottom:1rem;padding-left:1.5rem}.materi-body li{margin-bottom:.5rem}.formula-box{border-left:4px solid var(--primary-light);border-radius:0 var(--radius-md) var(--radius-md) 0;background:linear-gradient(135deg,#3b82f60f,#f59e0b0f);margin:1.25rem 0;padding:1rem 1.25rem}.materi-table{border-collapse:collapse;width:100%;margin:1.25rem 0;font-size:.85rem}.materi-table th,.materi-table td{border:1px solid var(--border-color);text-align:left;padding:.75rem}.materi-table th{background:var(--bg-subtle);color:var(--text-primary);font-weight:700}.practice-controls{background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid var(--border-color);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1.5rem;padding:1rem 1.5rem;display:flex}.filter-group{flex-wrap:wrap;gap:.5rem;display:flex}.filter-btn{background:var(--bg-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);padding:.45rem .9rem;font-size:.85rem;font-weight:600}.filter-btn:hover{border-color:var(--primary-light);color:var(--primary-light)}.filter-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.search-box{min-width:260px;position:relative}.search-box input{border-radius:var(--radius-md);border:1px solid var(--border-color);background:var(--bg-main);width:100%;color:var(--text-primary);padding:.5rem 1rem .5rem 2.2rem;font-size:.85rem}.search-icon{color:var(--text-muted);position:absolute;top:50%;left:.75rem;transform:translateY(-50%)}.question-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:var(--transition);margin-bottom:1.25rem;padding:1.5rem}.question-card:hover{box-shadow:var(--shadow-md)}.question-header{justify-content:space-between;align-items:center;margin-bottom:1rem;display:flex}.q-badge{border-radius:var(--radius-sm);padding:.25rem .65rem;font-size:.75rem;font-weight:700}.q-badge.twk{color:#dc2626;background:#fee2e2}.q-badge.tiu{color:#4338ca;background:#e0e7ff}.q-badge.tkp{color:#d97706;background:#fef3c7}.q-badge.skb,.q-badge.skb-guru{color:#059669;background:#dcfce7}.q-number{color:var(--primary);font-size:1.05rem;font-weight:800}.q-text{color:var(--text-primary);white-space:pre-line;margin-bottom:1.25rem;font-size:.95rem;font-weight:500;line-height:1.7}.options-container{flex-direction:column;gap:.6rem;margin-bottom:1rem;display:flex}.option-btn{text-align:left;background:var(--bg-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);cursor:pointer;transition:var(--transition);align-items:flex-start;gap:.75rem;padding:.75rem 1rem;font-size:.9rem;display:flex}.option-btn:hover{border-color:var(--primary-light);background:#3b82f614}.opt-letter{color:var(--primary);background:#1e3a8a1a;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;font-size:.8rem;font-weight:700;display:flex}.option-btn.selected{border-color:var(--primary-light);background:#3b82f626;font-weight:600}.option-btn.correct{border-color:var(--accent-emerald);background:#10b98126}.option-btn.correct .opt-letter{background:var(--accent-emerald);color:#fff}.option-btn.wrong{border-color:var(--accent-red);background:#ef44441f}.option-btn.wrong .opt-letter{background:var(--accent-red);color:#fff}.pembahasan-box{border-radius:var(--radius-md);background:linear-gradient(135deg,#3b82f60d,#10b9810d);border:1px solid #10b9814d;margin-top:1rem;padding:1.25rem;animation:.3s fadeIn}.pembahasan-header{color:var(--accent-emerald);align-items:center;gap:.5rem;margin-bottom:.5rem;font-size:.95rem;font-weight:700;display:flex}.pembahasan-content{color:var(--text-secondary);font-size:.88rem;line-height:1.7}.pembahasan-tips{border-left:3px solid var(--accent-gold);color:#b45309;border-radius:0 var(--radius-sm) var(--radius-sm) 0;background:#f59e0b1a;margin-top:.75rem;padding:.5rem .85rem;font-size:.82rem}[data-theme=dark] .pembahasan-tips{color:#fef08a}.site-footer{background:var(--primary-dark);color:#94a3b8;border-top:1px solid #1e293b;margin-top:auto;padding:2.5rem 1rem 1.5rem}.footer-content{flex-wrap:wrap;justify-content:space-between;gap:2rem;max-width:1300px;margin:0 auto 1.5rem;display:flex}.footer-col h4{color:#fff;margin-bottom:.75rem;font-size:.95rem;font-weight:700}.footer-col p{max-width:400px;font-size:.85rem;line-height:1.6}.footer-bottom{text-align:center;border-top:1px solid #ffffff0d;max-width:1300px;margin:0 auto;padding-top:1rem;font-size:.8rem}@media (width<=900px){.book-hero-card{text-align:center;grid-template-columns:1fr;padding:1.75rem}.cover-wrapper{max-width:220px;margin:0 auto}.hero-badges-row,.hero-btn-group{justify-content:center}.materi-container{grid-template-columns:1fr}.materi-sidebar{border-right:none;border-bottom:1px solid var(--border-color)}}.cat-container{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);margin-bottom:2rem;overflow:hidden}.cat-header{color:#fff;background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 100%);border-bottom:3px solid #f59e0b;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;padding:1rem 1.5rem;display:flex}.cat-user-info{align-items:center;gap:1rem;display:flex}.cat-avatar{color:#1e3a8a;width:50px;height:50px;box-shadow:var(--shadow-sm);background:#f1f5f9;border:2px solid #fff;border-radius:50%;justify-content:center;align-items:center;font-size:1.5rem;display:flex}.cat-user-meta h4{color:#fff;font-size:.95rem;font-weight:700}.cat-user-meta p{color:#93c5fd;font-size:.78rem}.cat-timer-box{border-radius:var(--radius-md);text-align:center;background:#000;border:2px solid #ef4444;padding:.5rem 1.25rem;box-shadow:0 0 15px #ef444466}.cat-timer-label{text-transform:uppercase;color:#94a3b8;letter-spacing:.05em;font-size:.65rem;font-weight:700}.cat-timer-digits{color:#f87171;letter-spacing:.05em;font-family:JetBrains Mono,monospace;font-size:1.6rem;font-weight:800}.cat-timer-digits.warning{color:#ef4444;animation:1s infinite pulseTimer}@keyframes pulseTimer{0%,to{opacity:1;transform:scale(1)}50%{opacity:.8;transform:scale(1.03)}}.cat-body{grid-template-columns:1fr 340px;min-height:560px;display:grid}.cat-exam-area{border-right:1px solid var(--border-color);background:var(--bg-card);flex-direction:column;justify-content:space-between;padding:2rem;display:flex}.cat-exam-subhead{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:.85rem;display:flex}.cat-q-title{color:var(--primary);align-items:center;gap:.5rem;font-size:1.15rem;font-weight:800;display:flex}.cat-font-resizer{gap:.35rem;display:flex}.resizer-btn{background:var(--bg-subtle);border:1px solid var(--border-color);cursor:pointer;border-radius:4px;width:28px;height:28px;font-size:.75rem;font-weight:700}.resizer-btn:hover{background:var(--primary-light);color:#fff}.cat-q-statement{color:var(--text-primary);white-space:pre-line;margin-bottom:1.75rem;font-size:1.05rem;line-height:1.8}.cat-choices-list{flex-direction:column;gap:.85rem;margin-bottom:2rem;display:flex}.cat-choice-item{background:var(--bg-subtle);border:2px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);align-items:flex-start;gap:1rem;padding:1rem 1.25rem;display:flex}.cat-choice-item:hover{border-color:var(--primary-light);background:#3b82f60d}.cat-choice-item.active{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary);background:#1e3a8a14}.cat-choice-radio{width:22px;height:22px;transition:var(--transition);border:2px solid #94a3b8;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;margin-top:2px;display:flex}.cat-choice-item.active .cat-choice-radio{border-color:var(--primary);background:var(--primary)}.cat-choice-item.active .cat-choice-radio:after{content:"";background:#fff;border-radius:50%;width:8px;height:8px}.cat-choice-text{color:var(--text-primary);font-size:.95rem;line-height:1.6}.cat-footer-actions{border-top:1px solid var(--border-color);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;padding-top:1.25rem;display:flex}.btn-cat-prev,.btn-cat-next{background:var(--primary);color:#fff;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);border:none;align-items:center;gap:.5rem;padding:.65rem 1.35rem;font-size:.88rem;font-weight:700;display:flex}.btn-cat-prev:hover,.btn-cat-next:hover{background:#172554;transform:translateY(-1px)}.btn-cat-prev:disabled{opacity:.5;cursor:not-allowed}.btn-cat-doubt{color:#b45309;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);background:#fef3c7;border:2px solid #f59e0b;align-items:center;gap:.4rem;padding:.65rem 1.2rem;font-size:.88rem;font-weight:700;display:flex}.btn-cat-doubt:hover{background:#fde68a}.btn-cat-doubt.active{color:#fff;background:#f59e0b}.btn-cat-finish{color:#fff;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);background:linear-gradient(135deg,#ef4444,#dc2626);border:none;align-items:center;gap:.5rem;padding:.65rem 1.35rem;font-size:.88rem;font-weight:800;display:flex;box-shadow:0 4px 10px #ef44444d}.btn-cat-finish:hover{background:#b91c1c;transform:translateY(-1px)}.cat-nav-sidebar{background:var(--bg-subtle);flex-direction:column;padding:1.5rem;display:flex}.cat-nav-title{color:var(--text-primary);justify-content:space-between;align-items:center;margin-bottom:.75rem;font-size:.95rem;font-weight:800;display:flex}.cat-legend{background:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border-color);grid-template-columns:1fr 1fr;gap:.5rem;margin-bottom:1.25rem;padding:.75rem;font-size:.75rem;display:grid}.legend-item{color:var(--text-secondary);align-items:center;gap:.4rem;display:flex}.legend-color{border-radius:3px;width:14px;height:14px}.legend-color.answered{background:#10b981}.legend-color.unanswered{background:#cbd5e1}.legend-color.doubtful{background:#f59e0b}.legend-color.active{background:#3b82f6;border:2px solid #1e3a8a}.cat-grid-wrapper{flex:1;max-height:400px;padding-right:.35rem;overflow-y:auto}.cat-numbers-grid{grid-template-columns:repeat(5,1fr);gap:.5rem;display:grid}.cat-grid-btn{aspect-ratio:1;border:1px solid var(--border-color);background:var(--bg-card);border-radius:var(--radius-sm);color:var(--text-primary);cursor:pointer;transition:var(--transition);justify-content:center;align-items:center;font-size:.85rem;font-weight:700;display:flex}.cat-grid-btn:hover{border-color:var(--primary-light);transform:scale(1.05)}.cat-grid-btn.answered{color:#fff;background:#10b981;border-color:#059669}.cat-grid-btn.doubtful{color:#fff;background:#f59e0b;border-color:#d97706}.cat-grid-btn.active{font-weight:900;box-shadow:0 0 0 3px #2563eb}.cat-result-card{background:var(--bg-card);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);border:1px solid var(--border-color);text-align:center;max-width:850px;margin:1.5rem auto;padding:2.5rem}.result-status-badge{border-radius:9999px;align-items:center;gap:.5rem;margin-bottom:1.5rem;padding:.6rem 1.5rem;font-size:1.15rem;font-weight:800;display:inline-flex}.result-status-badge.passed{color:#065f46;background:#d1fae5;border:2px solid #10b981}.result-status-badge.failed{color:#991b1b;background:#fee2e2;border:2px solid #ef4444}.score-summary-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1.25rem;margin:2rem 0;display:grid}.score-box{background:var(--bg-subtle);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.25rem}.score-box h5{color:var(--text-secondary);margin-bottom:.4rem;font-size:.85rem}.score-val{color:var(--text-primary);font-size:1.8rem;font-weight:800}.score-pg-target{margin-top:.3rem;font-size:.75rem;font-weight:600}.score-pg-target.pass{color:#059669}.score-pg-target.fail{color:#dc2626}@media (width<=900px){.cat-body{grid-template-columns:1fr}.cat-nav-sidebar{border-top:1px solid var(--border-color)}.cat-numbers-grid{grid-template-columns:repeat(8,1fr)}}.print-preview-container{border-radius:var(--radius-lg);background:#525659;margin-bottom:2rem;padding:2rem 1rem}.print-toolbar{border-radius:var(--radius-md);background:#fff;justify-content:space-between;align-items:center;max-width:820px;margin:0 auto 1.5rem;padding:1rem 1.5rem;display:flex;box-shadow:0 4px 15px #0003}.book-sheet{color:#111827;background:#fff;max-width:820px;margin:0 auto 2rem;padding:3rem 3.5rem;font-family:Plus Jakarta Sans,Georgia,serif;line-height:1.7;box-shadow:0 10px 30px #00000059}.book-cover-page{text-align:center;border:4px double #1e3a8a;flex-direction:column;justify-content:space-between;min-height:1000px;padding:3rem 2rem;display:flex;position:relative}.book-cover-page .print-cover-img{border-radius:8px;max-width:380px;margin:1.5rem auto;box-shadow:0 8px 25px #00000040}.cover-header-tag{letter-spacing:.15em;color:#1e3a8a;text-transform:uppercase;font-size:.9rem;font-weight:800}.cover-main-title{color:#0f172a;margin:1rem 0;font-size:2.2rem;font-weight:900;line-height:1.2}.cover-subtitle{color:#475569;font-size:1.1rem;font-weight:600}.cover-meta-info{color:#64748b;border-top:2px solid #e2e8f0;padding-top:1.5rem;font-size:.85rem}.book-toc{margin:2rem 0}.toc-row{align-items:baseline;margin-bottom:.75rem;display:flex}.toc-title{white-space:nowrap;font-weight:600}.toc-leader{border-bottom:1px dotted #94a3b8;flex-grow:1;margin:0 .5rem}.toc-page{color:#1e3a8a;font-weight:700}.print-section-title{color:#1e3a8a;text-transform:uppercase;letter-spacing:.03em;border-bottom:2px solid #1e3a8a;margin:2rem 0 1.5rem;padding-bottom:.5rem;font-size:1.4rem;font-weight:800}.print-q-block{page-break-inside:avoid;margin-bottom:1.5rem}.print-q-num{color:#0f172a;margin-right:.4rem;font-weight:800}.print-q-text{color:#1e293b;margin-bottom:.5rem;font-size:.92rem;display:inline}.print-choices{margin:.4rem 0 0 1.5rem;font-size:.88rem}.print-opt{margin-bottom:.25rem}.print-solution-item{page-break-inside:avoid;border-bottom:1px dashed #cbd5e1;margin-bottom:1.25rem;padding-bottom:1rem}.print-sol-head{color:#1e3a8a;align-items:center;gap:.6rem;margin-bottom:.35rem;font-size:.95rem;font-weight:700;display:flex}.print-sol-key{color:#fff;background:#1e3a8a;border-radius:4px;padding:.15rem .5rem;font-size:.8rem}.print-sol-text{color:#334155;font-size:.85rem;line-height:1.6}@media print{body{color:#000!important;background:#fff!important}.top-header,.site-footer,.print-toolbar,.practice-controls,.hero-btn-group,.btn-cat-finish,.nav-tabs-wrapper,.btn-icon{display:none!important}.print-preview-container{background:0 0!important;padding:0!important}.book-sheet{box-shadow:none!important;max-width:100%!important;margin:0!important;padding:0!important}.page-break{page-break-before:always!important;break-before:page!important}.print-q-block,.print-solution-item{page-break-inside:avoid!important;break-inside:avoid!important}@page{size:A4 portrait;margin:1.8cm 1.5cm}}