.topic-hub-bleed{position:relative;width:100vw;margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw);background:#f7f8fc;min-height:100%}.topic-hub-bleed--has-bg{background:transparent}.topic-hub-page-bg{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none}.topic-hub-page-bg__img{width:100%;height:100%;object-fit:cover;object-position:center top}.topic-hub-page-bg__scrim{position:absolute;inset:0;background:linear-gradient(180deg,rgba(247,248,252,.55),rgba(247,248,252,.82) 38%,rgba(247,248,252,.94))}.topic-hub-page{position:relative;z-index:1;--th-primary:#6c4cf1;--th-bg:#f7f8fc;--th-surface:#fff;--th-text:#1a1a2e;--th-heading:#112;--th-muted:#8a8a9e;--th-body:#5b5b72;--th-border:#eeeef3;--th-soft:#f7f7fb;--th-tag-bg:#efebff;--th-ease:300ms cubic-bezier(0.4,0,0.2,1);box-sizing:border-box;max-width:1440px;margin:0 auto;padding:24px 40px 60px}.topic-hub-bleed:not(.topic-hub-bleed--has-bg) .topic-hub-page{background:var(--th-bg)}.topic-hub-bleed--has-bg .topic-hub-card{background:hsla(0,0%,100%,.94);backdrop-filter:blur(10px)}@media (max-width:768px){.topic-hub-page{padding:16px 20px 48px}}.topic-hub-back{display:inline-flex;align-items:center;gap:12px;margin-bottom:20px;text-decoration:none;color:inherit}.topic-hub-back__icon{width:36px;height:36px;border-radius:10px;background:var(--th-surface);display:flex;align-items:center;justify-content:center;box-shadow:0 1px 2px rgba(0,0,0,.06);flex-shrink:0;color:#4b4b63;font-size:16px;line-height:1}.topic-hub-back__label{font-size:15px;font-weight:600;color:var(--th-text)}.topic-hub-layout{display:flex;flex-wrap:wrap;gap:24px;align-items:flex-start}.topic-hub-main{flex:2 1 620px;min-width:320px;display:flex;flex-direction:column;gap:24px}.topic-hub-sidebar{flex:1 1 300px;min-width:280px;display:flex;flex-direction:column;gap:20px}.topic-hub-card{background:var(--th-surface);border-radius:20px;padding:28px;box-shadow:0 1px 3px rgba(0,0,0,.05);box-sizing:border-box}.topic-hub-card--compact{padding:22px}.topic-hub-banner{position:relative;width:100%;height:340px;border-radius:16px;overflow:hidden;margin-bottom:24px;background:linear-gradient(135deg,#ffe07d,#ffb86b 35%,#7fcbea 70%,#5aa7de)}.topic-hub-banner__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.topic-hub-banner__actions{position:absolute;top:16px;right:16px;display:flex;gap:10px;z-index:2;align-items:flex-start;flex-wrap:wrap;justify-content:flex-end;max-width:calc(100% - 32px)}.topic-hub-banner__action{width:40px;height:40px;border-radius:12px;background:hsla(0,0%,100%,.9);border:none;display:flex;align-items:center;justify-content:center;box-shadow:0 1px 4px rgba(0,0,0,.1);font-size:16px;cursor:pointer;color:var(--th-text)}.topic-hub-banner__action--active{color:var(--th-primary)}.topic-hub-banner__action:disabled{opacity:.55;cursor:not-allowed}.topic-hub-banner__notice{flex:0 0 100%;text-align:right;padding:6px 10px;border-radius:8px;background:hsla(0,0%,100%,.95);box-shadow:0 2px 8px rgba(0,0,0,.12);font-size:12px;font-weight:600;color:var(--th-primary);line-height:1.35;max-width:280px;margin-left:auto}.topic-hub-title{font-size:34px;font-weight:800;margin:0 0 12px;color:var(--th-heading);letter-spacing:-.02em}.topic-hub-lead{font-size:15px;line-height:1.6;color:var(--th-body);margin:0 0 20px;max-width:640px}.topic-hub-lead--clamp{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.topic-hub-cta--disabled{opacity:.55;cursor:default;pointer-events:none}.topic-hub-stats{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:24px}.topic-hub-stat{flex:1 1 120px;background:var(--th-soft);border-radius:14px;padding:14px 18px;min-width:120px}.topic-hub-stat__label{font-size:13px;color:var(--th-muted);margin-bottom:6px}.topic-hub-stat__value{font-size:20px;font-weight:700;color:var(--th-text)}.topic-hub-stat__value--accent{color:var(--th-primary)}.topic-hub-cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:28px}.topic-hub-cta{display:inline-flex;align-items:center;gap:8px;background:var(--th-primary);color:#fff;border:none;border-radius:12px;padding:15px 28px;font-size:15px;font-weight:700;text-decoration:none;cursor:pointer;transition:transform var(--th-ease),box-shadow var(--th-ease)}.topic-hub-cta:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 24px rgba(108,76,241,.35)}.topic-hub-cta:disabled{opacity:.65;cursor:wait}.topic-hub-progress-inline{flex:1 1 220px;min-width:200px}.topic-hub-progress-inline__head{display:flex;justify-content:space-between;font-size:13px;color:var(--th-muted);margin-bottom:6px}.topic-hub-progress-inline__head strong{font-weight:700;color:var(--th-text)}.topic-hub-progress-inline__track{width:100%;height:8px;background:#ededf4;border-radius:6px;overflow:hidden}.topic-hub-progress-inline__fill{height:100%;background:var(--th-primary);border-radius:6px;transition:width .4s ease}.topic-hub-tabs-card{padding:0;overflow:hidden}.topic-hub-tabs{display:flex;flex-wrap:wrap;gap:32px;padding:0 28px;border-bottom:1px solid var(--th-border)}.topic-hub-tab{padding:18px 0;font-size:14px;font-weight:600;color:var(--th-muted);background:none;border:none;border-bottom:2px solid transparent;margin-bottom:-1px;cursor:pointer;display:inline-flex;align-items:center;gap:6px}.topic-hub-tab--active{font-weight:700;color:var(--th-primary);border-bottom-color:var(--th-primary)}.topic-hub-tab__badge{background:var(--th-tag-bg);color:var(--th-primary);font-size:11px;font-weight:700;padding:2px 7px;border-radius:8px}.topic-hub-tab-panel{padding:28px}.topic-hub-tab-grid{display:flex;flex-wrap:wrap;gap:24px}.topic-hub-tab-col{flex:1 1 280px;min-width:260px}.topic-hub-tab-col h3{font-size:17px;font-weight:700;margin:0 0 14px;color:var(--th-text)}.topic-hub-tab-col p{font-size:14px;line-height:1.6;color:var(--th-body);margin:0 0 18px}.topic-hub-checklist{display:flex;flex-direction:column;gap:12px;margin-bottom:20px;list-style:none;padding:0;margin-top:0}.topic-hub-checklist li{display:flex;align-items:center;gap:10px;font-size:14px;color:#3a3a4e}.topic-hub-checklist__icon{width:20px;height:20px;border-radius:6px;background:var(--th-tag-bg);color:var(--th-primary);display:flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0}.topic-hub-show-more{margin:-12px 0 20px;width:100%;background:var(--th-soft);border:none;border-radius:12px;padding:14px;font-size:14px;font-weight:600;color:var(--th-primary);cursor:pointer}.topic-hub-sidebar-block__title{font-size:16px;font-weight:700;color:var(--th-text);margin:0 0 14px}.topic-hub-sample{flex:1 1 320px;min-width:280px;background:#fafafd;border-radius:16px;padding:22px;box-sizing:border-box}.topic-hub-card--compact .topic-hub-sample{flex:none;min-width:0;background:transparent;padding:0;border-radius:0}.topic-hub-sample h3{font-size:16px;font-weight:700;margin:0 0 16px;color:var(--th-text)}.topic-hub-sample__q{display:flex;align-items:flex-start;gap:8px;font-size:14px;font-weight:600;color:var(--th-text);margin-bottom:16px}.topic-hub-sample__q-mark{color:#b9b9c8}.topic-hub-sample__options{display:flex;flex-direction:column;gap:12px}.topic-hub-sample__row{display:flex;flex-wrap:wrap;gap:12px}.topic-hub-sample__opt{flex:1 1 130px;border:1px solid #e7e7ef;border-radius:10px;padding:13px 16px;font-size:14px;font-weight:600;color:#3a3a4e}.topic-hub-sample__opt--correct{border:2px solid var(--th-primary);background:#f5f2ff;color:var(--th-primary);display:flex;align-items:center;justify-content:space-between;gap:8px}.topic-hub-sample__check{width:18px;height:18px;border-radius:50%;background:var(--th-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:11px;flex-shrink:0}.topic-hub-sample__dots{display:flex;justify-content:center;gap:8px;margin-top:22px}.topic-hub-sample__dot{width:8px;height:8px;padding:0;border:none;border-radius:50%;background:#e2e2ea;cursor:pointer}.topic-hub-sample__dot--active{background:var(--th-primary)}.topic-hub-sample__dot--answered:not(.topic-hub-sample__dot--active){background:#c8c8d4}.topic-hub-sample__q--answered{opacity:.72}.topic-hub-sample__start{display:flex;align-items:center;justify-content:center;width:100%;margin-top:18px;min-height:44px;padding:0 16px;border:none;border-radius:12px;background:var(--th-primary);color:#fff;font-size:14px;font-weight:700;cursor:pointer;transition:opacity .15s ease,transform .15s ease}.topic-hub-sample__start:hover:not(:disabled){opacity:.92}.topic-hub-sample__start:disabled{opacity:.55;cursor:wait}.topic-hub-modes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}.topic-hub-mode-tile{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:18px;min-height:130px;border-radius:16px;border:1px solid var(--th-border);background:var(--th-soft);text-decoration:none;color:inherit;transition:transform var(--th-ease),box-shadow var(--th-ease)}.topic-hub-mode-tile:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(108,76,241,.12)}.topic-hub-mode-tile__emoji{font-size:28px;line-height:1}.topic-hub-mode-tile__name{font-size:15px;font-weight:700;color:var(--th-text)}.topic-hub-mode-tile__meta{margin-top:auto;font-size:13px;font-weight:600;color:var(--th-primary)}.topic-hub-sidebar-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.topic-hub-sidebar-head__title{font-size:16px;font-weight:700;color:var(--th-text);margin-bottom:4px}.topic-hub-sidebar-head__sub{font-size:13px;color:var(--th-muted)}.topic-hub-ring{position:relative;width:64px;height:64px;flex-shrink:0}.topic-hub-ring,.topic-hub-ring__inner{border-radius:50%;display:flex;align-items:center;justify-content:center}.topic-hub-ring__inner{width:48px;height:48px;background:var(--th-surface);font-size:13px;font-weight:700;color:var(--th-text)}.topic-hub-sidebar-rows{display:flex;flex-direction:column;gap:14px}.topic-hub-sidebar-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.topic-hub-sidebar-row__label{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--th-body)}.topic-hub-sidebar-row__label span:first-child{color:var(--th-muted)}.topic-hub-sidebar-row__value{font-size:14px;font-weight:700;color:var(--th-text)}.topic-hub-achievements-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.topic-hub-achievements-head__title{font-size:16px;font-weight:700;color:var(--th-text)}.topic-hub-achievements-head__count{font-size:13px;font-weight:600;color:var(--th-muted)}.topic-hub-achievements-grid{display:flex;gap:14px;margin-bottom:18px}.topic-hub-achievement-tile{flex:1;display:flex;flex-direction:column;align-items:center;text-align:center}.topic-hub-achievement-tile--locked{opacity:.45}.topic-hub-achievement-tile__icon{width:56px;height:56px;border-radius:14px;background:#f5f2ff;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:8px}.topic-hub-achievement-tile--locked .topic-hub-achievement-tile__icon{background:#f2f2f6}.topic-hub-achievement-tile__name{font-size:12px;font-weight:700;color:var(--th-text)}.topic-hub-achievement-tile__hint{font-size:11px;color:#b0b0c0}.topic-hub-link-btn{display:block;text-align:center;font-size:14px;font-weight:600;color:var(--th-primary);text-decoration:none}.topic-hub-link-btn:hover{text-decoration:underline}.topic-hub-players-head{display:flex;flex-direction:column;align-items:flex-start;gap:4px;margin-bottom:18px}.topic-hub-players-head__hint{margin:0;font-size:.75rem;line-height:1.35;color:var(--ink-muted,#64748b)}.topic-hub-players-list{display:flex;flex-direction:column;gap:16px}.topic-hub-player{display:grid;grid-template-columns:20px 38px minmax(0,1fr) minmax(0,1.35fr) auto;align-items:center;gap:12px}.topic-hub-player--topic-scoped{grid-template-columns:20px 38px minmax(0,1fr) auto}.topic-hub-player__topic-col{min-width:0}.topic-hub-player__topic{width:100%;max-width:100%}.topic-hub-player__topic-empty{font-size:13px;color:#b0b0c0}.topic-hub-player__rank{width:20px;font-size:14px;text-align:center;flex-shrink:0}.topic-hub-player__rank--num{font-size:13px;color:#b0b0c0;font-weight:700}.topic-hub-player__avatar{width:38px;height:38px;border-radius:50%;background:#e8e8f0;flex-shrink:0;overflow:hidden}.topic-hub-player__name{font-size:14px;font-weight:600;color:var(--th-text);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topic-hub-player__xp{font-size:13px;font-weight:700;color:var(--th-text);flex-shrink:0}.topic-hub-skeleton{animation:topic-hub-pulse 1.4s ease-in-out infinite;background:linear-gradient(90deg,#eef1f6 25%,#f8f9fc 50%,#eef1f6 75%);background-size:200% 100%;border-radius:20px;min-height:400px}.topic-hub-empty{font-size:14px;color:var(--th-muted)}@keyframes topic-hub-pulse{0%{background-position:200% 0}to{background-position:-200% 0}}.topic-hub-suggested-topics{margin-top:24px}.topic-hub-suggested-topics__title{margin:0 0 16px;font-size:18px;font-weight:700;color:var(--th-text)}.topic-hub-categories{margin-top:48px}.topic-hub-categories--section-only,.topic-hub-categories--section-only.home-v2-section{margin-top:0}.topic-hub-categories--section-only .home-v2-section-sub{max-width:48rem}.topic-hub-section-description{margin-top:24px;margin-bottom:0}.topic-hub-quizzes{margin-top:32px}.topic-hub-quizzes__title{margin:0 0 16px;font-size:1.25rem;font-weight:700;color:var(--ink,#1d2340)}.topic-hub-quizzes__grid{display:grid;align-items:stretch;gap:20px;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));margin:20px 0 0;padding:20px;list-style:none;background:#fff;border-radius:16px}.topic-hub-quizzes__list{display:flex;flex-direction:column;gap:12px;margin:20px 0 0;padding:0;list-style:none}@media (max-width:768px){.topic-hub-categories{margin-top:32px}}