.topic-page{color:#1a1a1a}.tt-main{max-width:940px;padding:40px 24px 72px;margin:auto;min-height:610px}.tt-hero{text-align:center}.tt-hero h1{font:500 clamp(36px,4.5vw,60px)/1.05 BDO,Arial,sans-serif;letter-spacing:-.03em;margin:0 0 16px}.tt-hero p{font-size:16.8px;line-height:1.6;color:#888;margin:0}.tt-total-stats{font-size:12.8px;color:#94a3b8;font-weight:500;letter-spacing:.01em;margin-top:8px}.tt-hero-progress{display:flex;align-items:center;justify-content:center;gap:10px;margin:14px auto 32px;color:#64748b;font-size:11px}.tt-progress-track{display:block;width:120px;height:7px;border-radius:6px;background:#e5e7eb;overflow:hidden}.tt-progress-track>div,.tt-progress-track>span{display:block;height:100%;background:var(--brand-primary);border-radius:6px;transition:width .4s ease}.tt-hero-progress .tt-progress-track{width:160px;height:5px}.tt-tabs{display:flex;align-items:center;width:max-content;padding:4px;margin:0 auto 10px;background:white;border:1px solid var(--brand-light);border-radius:30px;box-shadow:0 2px 5px color-mix(in srgb, var(--brand-primary) 3.53%, transparent);gap:3px}.tt-tabs button{border:0;background:transparent;border-radius:25px;font:600 12.8px/1.4 Inter,Arial;padding:8px 18px;color:#64748b;min-width:60px}.tt-tabs button.active{background:var(--brand-primary);color:white;box-shadow:0 2px 5px color-mix(in srgb, var(--brand-primary) 14.90%, transparent)}.tt-tabs button:disabled{cursor:default;opacity:.7}.tt-tabs button span{display:inline-block;background:#e8ecf0;border-radius:12px;font-size:10.5px;padding:1px 6px;margin-left:4px;color:var(--brand-primary)}.tt-tabs .active span{background:#ffffff30;color:white}.tt-source-tabs{margin-bottom:40px}.tt-subject-card{border:1px solid var(--brand-border);border-radius:16px;background:white;margin-bottom:12px;box-shadow:0 8px 30px color-mix(in srgb, var(--brand-primary) 7.84%, transparent);overflow:hidden}.tt-subject-header{display:flex;align-items:center;width:100%;text-align:left;gap:16px;padding:18.4px 24px;background:transparent;border:0;border-radius:0;color:#1a1a1a}.tt-subject-icon{background:var(--brand-primary);color:white;border-radius:10px;height:40px;width:40px;display:grid;place-items:center;flex-shrink:0}.tt-subject-icon svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6}.tt-subject-info{flex:1;display:block}.tt-subject-name{display:block;font-size:16.8px;font-weight:600;margin-bottom:3.2px}.tt-subject-stats{display:block;color:#64748b;font-size:12px;font-weight:400}.tt-subject-right{display:flex;align-items:center;gap:20px}.tt-subject-progress-wrap{display:flex;align-items:center;gap:8px;font-size:10.5px;font-weight:600;color:var(--brand-primary)}.tt-chevron{width:14px;height:14px;fill:none;stroke:#94a3b8;stroke-width:1.5;transition:transform .2s}.is-open .tt-chevron{transform:rotate(180deg)}.tt-chapters{padding:14px 24px 24px 79px;animation:tt-reveal .25s ease}.tt-chapters[hidden]{display:none}.tt-chapter-header{display:flex;align-items:center;gap:10.4px}.tt-chapter-number{border-radius:50%;width:24px;height:24px;display:grid;place-items:center;font-size:11px;font-weight:600;background:var(--brand-primary);color:white;flex-shrink:0}.tt-chapter-info{flex:1}.tt-chapter-name{display:block;font-size:14px;font-weight:500}.tt-chapter-meta{display:block;font-size:10.5px;margin-top:3px;color:#64748b}.tt-chapter-right{display:flex;align-items:center;gap:8px;font-size:10.5px;font-weight:600;color:var(--brand-primary)}.tt-test-grid{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:8px;margin-top:9.6px}.tt-test-card{position:relative;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;text-align:left;min-height:60px;border:1px solid var(--brand-light);border-radius:10px;padding:12px 12px 9.6px;background:white;transition:border-color .18s,box-shadow .18s,transform .18s}.tt-test-card:hover{border-color:var(--brand-primary);box-shadow:0 4px 12px color-mix(in srgb, var(--brand-primary) 7.06%, transparent);transform:translateY(-2px)}.tt-test-card:focus-visible{outline:2px solid var(--brand-primary);outline-offset:3px}.tt-test-num{font-size:17.6px;font-weight:700;color:var(--brand-primary)}.tt-test-badge{position:absolute;right:8px;top:6px;font-size:9.6px;font-weight:600;color:#64748b;background:var(--brand-light);border-radius:4px;padding:1px 5px}.tt-test-card.in-progress{background:color-mix(in srgb, var(--brand-light) 45%, white)}.tt-test-resume{font-size:10px;font-weight:600;text-transform:uppercase;color:#475569;margin-top:3px}.tt-test-card.completed{background:#ecfdf5;border-color:#a7f3d0}.tt-test-score{font-size:10px;font-weight:600;color:#047857;margin-top:3px}.tt-page-links{display:flex;justify-content:flex-end;margin-top:22px}.tt-page-links a{font-size:12px;color:#64748b;text-decoration:none}.topic-page .paper-footer{background:#080808;border-radius:24px 24px 0 0}.topic-page .paper-footer h2{font-size:38px}.topic-page .legal-links a{color:#aaa}@keyframes tt-reveal{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}@media(max-width:700px){.tt-main{padding:30px 16px 50px}.tt-subject-header{padding:18px 16px;gap:10px}.tt-subject-right .tt-progress-track{display:none}.tt-subject-right{gap:10px}.tt-subject-name{font-size:14px}.tt-chapters{padding:14px 16px 24px}.tt-test-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.tt-chapter-right .tt-progress-track{width:65px}.tt-source-tabs{margin-bottom:26px}}@media(prefers-reduced-motion:reduce){.tt-chapters{animation:none}.tt-test-card,.tt-progress-track>span,.tt-progress-track>div{transition:none}}
.tt-chapter-item+.tt-chapter-item{margin-top:28px;padding-top:20px;border-top:1px solid #edf0f4}
/* Sectional catalogue: shared question bank, sidebar navigation, compact test rows. */
.st-main{max-width:1440px;margin:0 auto;padding:38px 28px 64px;color:#101827}.st-hero{text-align:center}.st-hero h1{font:600 48px/1.15 BDO,Inter,Arial,sans-serif;letter-spacing:-1.5px;margin:0 0 10px}.st-hero>p{font-size:20px;color:#66758b;margin:0 0 24px}.st-section-tabs{margin-bottom:10px}.st-section-tabs button{font-size:15px;padding:10px 26px;min-width:96px}.st-source-tabs{margin-bottom:0}.st-source-tabs button{font-size:13px;padding:8px 22px}.st-total-stats{font-size:15px;color:#64748b;text-align:center;margin:16px 0 24px}.st-workspace{display:grid;grid-template-columns:340px minmax(0,1fr);gap:18px;align-items:start}.st-sidebar,.st-content{border:1px solid var(--brand-light);border-radius:16px;background:white}.st-sidebar{padding:20px 16px;position:sticky;top:76px}.st-sidebar h2{font:600 23px BDO,Inter,Arial,sans-serif;margin:0 12px 16px;letter-spacing:-.5px}.st-subject+.st-subject{margin-top:12px}.st-subject-button{display:flex;align-items:center;gap:12px;width:100%;background:#fff;border:1px solid var(--brand-light);border-radius:10px;padding:12px;color:#101827;text-align:left;cursor:pointer;font-family:Inter,Arial,sans-serif}.st-subject-button.selected{background:var(--brand-primary);border-color:var(--brand-primary);color:#fff}.st-subject-button strong{font-size:14px;font-weight:600;flex:1}.st-subject-icon{display:flex;flex:0 0 23px}.st-subject-icon svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.st-subject-count{font-size:12px;color:#71829c;white-space:nowrap}.selected .st-subject-count{color:var(--brand-border)}.st-chevron{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:1.5;flex-shrink:0;transition:transform .18s}.st-subject-button[aria-expanded=true] .st-chevron{transform:rotate(180deg)}.st-chapter-links{padding:6px 0 2px 26px;margin:0 8px 0 25px;border-left:1px solid var(--brand-light)}.st-chapter-links[hidden]{display:none}.st-chapter-button{display:flex;align-items:center;gap:12px;border:0;background:transparent;width:100%;padding:9px 12px;border-radius:9px;color:#64748b;font:400 13px/1.5 Inter,Arial,sans-serif;text-align:left;cursor:pointer}.st-chapter-button.selected{background:var(--brand-light);color:var(--brand-primary);font-weight:600}.st-chapter-button:hover{background:var(--brand-light)}.st-chapter-dot{width:8px;height:8px;background:var(--brand-border);border-radius:50%;flex-shrink:0}.selected .st-chapter-dot{background:var(--brand-primary)}.st-chapter-count{margin-left:auto;color:#71829c;font-weight:400}.st-content{padding:24px;min-width:0}.st-content-heading{padding:0 8px;margin-bottom:20px}.st-breadcrumb{font-size:14px;color:#64748b;margin:0 0 8px}.st-content-heading h2{font:600 34px/1.2 BDO,Inter,Arial,sans-serif;letter-spacing:-1px;margin:0 0 8px}.st-content-heading>p:last-child{font-size:17px;color:#64748b;margin:0}.st-test-list{display:flex;flex-direction:column;gap:12px;animation:st-fade .18s ease-out}.st-test-row{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(150px,1fr) 170px;align-items:center;gap:18px;padding:18px;border:1px solid var(--brand-light);border-radius:13px;min-height:94px}.st-test-row.completed{background:#f9fdfa}.st-test-info{display:flex;align-items:center;gap:22px;min-width:0}.st-test-number{display:grid;place-items:center;flex:0 0 52px;height:52px;background:#f1f3f6;color:#9ca3af;border-radius:11px;font:500 25px BDO,Inter,Arial,sans-serif}.st-test-info h3{font-size:16px;font-weight:600;line-height:1.4;margin:0 0 5px}.st-test-info p{font-size:13px;line-height:1.5;color:#64748b;margin:0;white-space:nowrap}.st-test-status{display:flex;align-items:center;gap:14px;min-height:52px;padding-left:24px;border-left:1px solid var(--brand-light);color:#68768c;font-size:14px}.st-test-status svg{width:25px;height:25px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.st-test-status strong{font-weight:500}.completed .st-test-status{color:#086227}.completed .st-test-status svg{color:#298b45}.progress .st-test-status{color:#a45100}.st-test-status p{font-size:13px;color:#64748b;margin:7px 0 0}.st-test-status b{color:var(--brand-primary);font-weight:600}.st-test-action{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;border:0;border-radius:100px;background:var(--brand-primary);color:#fff;padding:14px 16px;font:600 14px Inter,Arial,sans-serif;cursor:pointer;transition:background .18s,transform .18s}.st-test-action.results{color:#086227;background:#e3f5e8}.st-test-action:hover{background:var(--brand-secondary);transform:translateY(-1px)}.st-test-action.results:hover{background:#d2ecdb}.st-test-action:disabled{opacity:.6;cursor:wait}.st-test-action span{font-size:22px;line-height:15px}.st-subject-button:focus-visible,.st-chapter-button:focus-visible,.st-test-action:focus-visible{outline:3px solid var(--brand-accent);outline-offset:2px}.sidebar-topic-page .paper-footer{background:var(--brand-primary);border-radius:0}.sidebar-topic-page .legal-links a{color:var(--brand-border)}
@keyframes st-fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1200px){.st-workspace{grid-template-columns:290px minmax(0,1fr)}.st-main{padding-left:20px;padding-right:20px}.st-sidebar{padding:18px 12px}.st-subject-button{gap:8px;padding:11px 9px}.st-subject-count{font-size:11px}.st-subject-button strong{font-size:13px}.st-chapter-links{margin-left:19px;padding-left:8px}.st-content{padding:20px}.st-test-row{grid-template-columns:minmax(0,1fr) 130px 130px;gap:12px;padding:16px}.st-test-info{gap:12px}.st-test-status{padding-left:14px;gap:8px;font-size:13px}.st-test-status svg{width:22px;height:22px}.st-test-number{flex-basis:42px;height:46px}.st-test-info p{font-size:12px}.st-test-action{font-size:13px}}
@media(max-width:980px){.st-test-row{grid-template-columns:minmax(0,1fr) auto}.st-test-info{grid-column:1/-1}.st-test-status{border:0;padding-left:0;min-height:40px}.st-test-action{width:145px}.st-hero h1{font-size:42px}.st-hero>p{font-size:18px}}
@media(max-width:700px){.st-main{padding:30px 16px 40px}.st-workspace{grid-template-columns:minmax(0,1fr);gap:16px}.st-sidebar{position:static;padding:16px}.st-chapter-links{margin-left:24px;padding-left:18px}.st-subject-button strong{font-size:14px}.st-content{padding:18px}.st-content-heading h2{font-size:30px}.st-section-tabs button{padding:9px 20px;min-width:84px}.st-hero h1{font-size:38px}.st-hero>p{font-size:16px}.st-chapter-button{padding:8px 12px}.st-total-stats{font-size:13px}.st-subject-count{font-size:12px}}
@media(max-width:520px){.sidebar-topic-page .nav-links{gap:16px}.sidebar-topic-page .nav-links>.pill,.sidebar-topic-page .nav-links>.outline{display:none}.sidebar-topic-page .menu-icon{margin-left:0}.st-test-action{width:130px}.st-test-info p{font-size:13px}}
@media(prefers-reduced-motion:reduce){.st-test-list{animation:none}.st-chevron,.st-test-action{transition:none}.st-test-action:hover{transform:none}}
/* Completion belongs to the selected chapter, counting each finished test once. */
.st-content-heading{position:relative;padding-right:155px}
.st-chapter-progress{position:absolute;top:2px;right:8px;width:125px;text-align:right;color:#64748b;font-size:11px;line-height:1.5}
.st-chapter-progress-track{height:5px;width:100%;border-radius:100px;background:#e5e7eb;overflow:hidden;margin-top:7px}
.st-chapter-progress-track>span{display:block;height:100%;background:var(--brand-primary);border-radius:inherit;transition:width .25s ease}
@media(max-width:700px){.st-content-heading{padding-right:117px}.st-chapter-progress{width:100px;right:0;font-size:10px}}
@media(prefers-reduced-motion:reduce){.st-chapter-progress-track>span{transition:none}}