.pb-reader *,.pb-reader *::before,.pb-reader *::after{ box-sizing:border-box} .pb-reader{ --pb-sidebar-w:260px;--pb-topbar-h:52px;--pb-sidebar-bg:#f8fafc;--pb-sidebar-border:#e2e8f0;--pb-sidebar-text:#0f172a;--pb-sidebar-active-bg:#ede9fe;--pb-sidebar-active-text:#0f172a;--pb-sidebar-hover-bg:#f1f5f9;--pb-content-bg:#ffffff;--pb-topbar-bg:#ffffff;--pb-topbar-border:#e2e8f0;--pb-topbar-text:#0f172a;--pb-accent:#7c3aed;--pb-accent-hover:#6d28d9;--pb-primary:#6366f1;--pb-primary-dark:#4f46e5;--pb-success:#10b981;--pb-line-height-reading:2.0;--pb-growth:linear-gradient(135deg,#6366f1 0%,#8b5cf6 50%,#a855f7 100%);--pb-radius:14px;--pb-transition:150ms cubic-bezier(0.4,0,0.2,1);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;color:#0f172a} .pb-reader{ display:flex;flex-direction:column;min-height:80vh;background:var(--pb-content-bg)} .pb-reader__topbar{ display:flex;align-items:center;height:var(--pb-topbar-h);background:var(--pb-topbar-bg);color:var(--pb-topbar-text);padding:0 24px;gap:16px;position:sticky;top:0;z-index:100;border-bottom:2px solid transparent;border-image:var(--pb-growth) 1;backdrop-filter:blur(10px);box-shadow:0 2px 8px rgba(0,0,0,0.04)} .pb-reader__hamburger{ font-size:18px;line-height:1} .pb-reader__sidebar-toggle{ background:linear-gradient(135deg,#e0f2fe 0%,#ede9fe 100%);border:none;color:var(--pb-primary);cursor:pointer;padding:10px;border-radius:8px;transition:all var(--pb-transition);box-shadow:0 2px 4px rgba(14,165,233,0.1)} .pb-reader__sidebar-toggle:hover{ background:linear-gradient(135deg,#bae6fd 0%,#ddd6fe 100%);transform:translateY(-1px);box-shadow:0 4px 8px rgba(14,165,233,0.15)} .pb-reader__topbar-title{ font-weight:700;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#0f172a;letter-spacing:-0.01em} .pb-reader__topbar-lesson{ font-size:11px;font-weight:500;color:#64748b;line-height:1.3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%} .pb-reader__topbar-lesson:empty{ display:none} .pb-reader__topbar-brand{ flex:1;display:flex;flex-direction:column;justify-content:center;min-width:0;gap:1px} .pb-reader__runtime-label{ font-size:9px;font-weight:600;letter-spacing:0.2em;text-transform:uppercase;color:#94a3b8;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;line-height:1} .pb-reader__phase-badge{ display:inline-block;font-size:10px;font-weight:600;letter-spacing:0.12em;text-transform:uppercase;color:#6366f1;background:#eef2ff;border:1px solid #c7d2fe;padding:3px 9px;border-radius:4px;white-space:nowrap;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;flex-shrink:0} .pb-reader__free-badge{ display:inline-block;font-size:10px;font-weight:700;letter-spacing:0.12em;text-transform:uppercase;color:#1d4ed8;background:#eff6ff;border:1px solid #bfdbfe;padding:3px 9px;border-radius:4px;white-space:nowrap;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;flex-shrink:0} .pb-reader__home-link{ display:inline-flex;align-items:center;gap:6px;color:#64748b;font-size:13px;font-weight:600;text-decoration:none;white-space:nowrap;padding:6px 12px;border-radius:6px;transition:all var(--pb-transition)} .pb-reader__home-link:hover{ color:var(--pb-primary);background:#f8fafc} .pb-reader__icon-link{ width:32px;height:32px;justify-content:center;padding:0} .pb-reader__icon-link svg{ display:block} .pb-reader__topbar-actions{ display:flex !important;align-items:center;gap:8px;margin-left:auto;flex-shrink:0;visibility:visible !important;opacity:1 !important} .pb-view-toolbar{ display:flex !important;flex-direction:row;align-items:center;gap:2px;background:rgba(0,0,0,0.05);border:1px solid #e2e8f0;border-radius:8px;padding:3px} .pb-view-btn{ display:flex;align-items:center;justify-content:center;width:32px;min-width:32px;padding:0;height:28px;border:none;background:transparent;color:#64748b;border-radius:6px;cursor:pointer;transition:all var(--pb-transition)} .pb-view-btn:hover{ color:var(--pb-primary);background:#f1f5f9} .pb-view-btn.is-active{ background:#ede9fe;color:var(--pb-primary)} .pb-view-btn svg{ display:block} .pb-view-toolbar--floating{ position:fixed;top:72px;right:18px;z-index:280;box-shadow:0 8px 24px rgba(15,23,42,0.18);background:#ffffff} .pb-reader__body{ display:flex;flex:1;overflow:hidden} .pb-reader__sidebar{ width:var(--pb-sidebar-w);min-width:var(--pb-sidebar-w);background:var(--pb-sidebar-bg);border-right:1px solid var(--pb-sidebar-border);overflow-y:auto;overflow-x:hidden;transition:all var(--pb-transition);height:calc(100vh - var(--pb-topbar-h));max-height:calc(100vh - var(--pb-topbar-h));min-height:400px;position:sticky;top:var(--pb-topbar-h);display:flex;flex-direction:column;box-shadow:inset -2px 0 8px rgba(0,0,0,0.02)} .pb-reader__sidebar.is-collapsed{ width:0;min-width:0;overflow:hidden} .pb-reader__sidebar::-webkit-scrollbar{ width:4px} .pb-reader__sidebar::-webkit-scrollbar-track{ background:transparent} .pb-reader__sidebar::-webkit-scrollbar-thumb{ background:#cbd5e1;border-radius:2px} .pb-reader__sidebar::-webkit-scrollbar-thumb:hover{ background:#94a3b8} .pb-sidebar{ padding:12px 0;flex:1} .pb-sidebar__header{ padding:16px 20px;border-bottom:1px solid #e2e8f0;margin-bottom:8px} .pb-sidebar__progress{ margin-top:12px} .pb-sidebar__progress-label{ display:flex;justify-content:space-between;font-size:11px;font-weight:600;color:#64748b;margin-bottom:6px;text-transform:uppercase;letter-spacing:0.05em} .pb-sidebar__tree-actions{ display:flex;gap:6px;margin-bottom:8px} .pb-sidebar__tree-btn{ font-size:11px;border:1px solid #dbeafe;background:#eff6ff;color:#1d4ed8;border-radius:999px;padding:3px 8px;cursor:pointer;font-weight:700} .pb-sidebar__tree-btn:hover{ background:#dbeafe} .pb-sidebar__progress-bar{ height:6px;background:#f1f5f9;border-radius:3px;overflow:hidden;position:relative} .pb-sidebar__progress-fill{ height:100%;background:var(--pb-growth);border-radius:3px;transition:width 0.6s cubic-bezier(0.4,0,0.2,1);position:relative;overflow:hidden} .pb-sidebar__progress-fill::after{ content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.3),transparent);animation:pb-shimmer 2s infinite} @keyframes pb-shimmer{ 0%{ transform:translateX(-100%)} 100%{ transform:translateX(100%)} } .pb-sidebar__chapter{ margin-bottom:2px} .pb-sidebar__chapter-header{ display:flex;align-items:stretch} .pb-sidebar__chapter-toggle{ display:flex;align-items:center;justify-content:center;flex-shrink:0;width:36px;background:none;border:none;color:#94a3b8;cursor:pointer;padding:0;transition:color var(--pb-transition),background var(--pb-transition);border-radius:6px;margin:4px 0 4px 8px} .pb-sidebar__chapter-toggle:hover{ color:var(--pb-primary);background:rgba(99,102,241,0.08)} .pb-sidebar__chapter-title-link{ flex:1;display:flex;align-items:center;gap:10px;padding:10px 16px 10px 4px;color:var(--pb-sidebar-text);text-decoration:none;font-size:13px;font-weight:600;line-height:1.5;transition:all var(--pb-transition);cursor:pointer;border-left:3px solid transparent;position:relative} .pb-sidebar__chapter-title-link:hover{ background:var(--pb-sidebar-hover-bg);color:var(--pb-primary)} .pb-sidebar__chapter-title-link.is-active{ background:var(--pb-sidebar-active-bg);color:var(--pb-primary);border-left-color:var(--pb-accent);font-weight:700} .pb-sidebar__chapter-title-link.is-done{ color:#94a3b8} .pb-sidebar__chapter-title{ flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap} .pb-sidebar__chapter-arrow{ display:inline-block;font-size:10px;transition:transform var(--pb-transition)} .pb-sidebar__chapter-toggle[aria-expanded="false"] .pb-sidebar__chapter-arrow{ transform:rotate(-90deg)} .pb-sidebar__chapter-children{ overflow:hidden;padding-left:14px;border-left:2px solid #e2e8f0;margin-left:18px;margin-top:2px;margin-bottom:4px} .pb-sidebar__chapter-toggle[aria-expanded="false"]+.pb-sidebar__chapter-children{ display:none} .pb-sidebar__chapter.is-collapsed>.pb-sidebar__chapter-children{ display:none} @media (max-width:1100px){ .pb-reader__phase-badge,.pb-reader__icon-link{ display:none} } .pb-sidebar__lesson{ display:flex;align-items:flex-start;gap:12px;padding:10px 20px 10px 24px;color:var(--pb-sidebar-text);text-decoration:none;font-size:13px;font-weight:500;line-height:1.5;transition:all var(--pb-transition);cursor:pointer;border-left:3px solid transparent;position:relative;margin:2px 0} .pb-sidebar__lesson:hover{ background:var(--pb-sidebar-hover-bg);transform:translateX(2px)} .pb-sidebar__lesson.is-active{ background:var(--pb-sidebar-active-bg);border-left-color:transparent;border-image:var(--pb-growth) 1;box-shadow:inset 0 0 0 1px rgba(14,165,233,0.1)} .pb-sidebar__lesson.is-active::after{ content:'';position:absolute;right:20px;top:50%;transform:translateY(-50%);width:4px;height:4px;background:var(--pb-primary);border-radius:50%;animation:pb-pulse 2s ease-in-out infinite} @keyframes pb-pulse{ 0%,100%{ opacity:1;transform:translateY(-50%) scale(1)} 50%{ opacity:0.5;transform:translateY(-50%) scale(1.5)} } .pb-sidebar__lesson.is-done{ color:#94a3b8} .pb-sidebar__done-badge{ font-size:11px;color:var(--pb-success);flex-shrink:0;opacity:0.7} .pb-sidebar__state-dot{ font-size:8px;color:#475569;flex-shrink:0} .pb-sidebar__state-dot.is-active{ font-size:9px;color:var(--pb-accent)} .pb-sidebar__dot{ font-size:8px;color:#cbd5e1;flex-shrink:0} .pb-sidebar__lesson-body{ flex:1;display:flex;flex-direction:column;gap:2px;min-width:0} .pb-sidebar__lesson-title{ overflow:hidden;text-overflow:ellipsis;white-space:nowrap} .pb-sidebar__signal-tag{ font-size:9px;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;padding:1px 5px;border-radius:3px;width:fit-content} .pb-sidebar__signal-tag--friction{ color:#92400e;background:#fef3c7;border:1px solid #fde68a} .pb-reader__content{ flex:1;overflow-y:auto;padding:56px 52px 80px;min-height:calc(100vh - var(--pb-topbar-h));background:var(--pb-content-bg);max-width:850px;margin:0 auto} #pb-reader.pb-reader--narrow .pb-reader__content{ max-width:680px} #pb-reader.pb-reader--medium .pb-reader__content{ max-width:850px} #pb-reader.pb-reader--wide .pb-reader__content{ max-width:100%;margin:0} .pb-lesson-header{ margin-bottom:32px;padding-bottom:24px;border-bottom:2px solid #f1f5f9} .pb-lesson-header__type{ display:inline-block;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:0.18em;color:#6366f1;background:transparent;border:1px solid #c7d2fe;padding:3px 10px;border-radius:4px;margin-bottom:16px;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace} .pb-lesson-header__title{ margin:0;font-size:32px;font-weight:800;line-height:1.25;color:#0f172a;letter-spacing:-0.03em} .pb-reader__content h1,.pb-reader__content h2,.pb-reader__content h3{ font-family:ui-serif,Georgia,"Times New Roman",serif;letter-spacing:-0.02em;line-height:1.3;color:#0f172a;margin-top:2em;margin-bottom:0.75em} .pb-reader__content h1{ font-size:2em;font-weight:700;background:var(--pb-growth);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text} .pb-reader__content h2{ font-size:1.5em;font-weight:600;color:var(--pb-primary-dark)} .pb-reader__content h3{ font-size:1.25em;font-weight:600} .pb-reader__content p{ line-height:var(--pb-line-height-reading);margin-bottom:1.75em;color:#334155} .pb-reader__content p+p{ margin-top:-0.5em} .pb-reader__content a{ color:var(--pb-primary);text-decoration:underline;text-decoration-color:rgba(14,165,233,0.3);text-underline-offset:2px;transition:all var(--pb-transition)} .pb-reader__content a:hover{ color:var(--pb-primary-dark);text-decoration-color:var(--pb-primary)} .pb-reader__content ul,.pb-reader__content ol{ margin-bottom:1.5em;padding-left:1.75em} .pb-reader__content li{ margin-bottom:0.5em;line-height:var(--pb-line-height-reading)} .pb-reader__content blockquote{ border-left:4px solid;border-image:var(--pb-growth) 1;padding:1em 1.5em;margin:1.5em 0;background:linear-gradient(90deg,#f8fafc 0%,#ffffff 100%);font-style:italic;color:#475569} .pb-reader__content.is-loading{ opacity:.5;pointer-events:none} .pb-gate-overlay{ display:flex;align-items:center;justify-content:center;min-height:400px} .pb-gate-card{ text-align:center;max-width:400px;padding:48px 32px;background:#f8fafc;border:1px solid #e2e8f0;border-radius:16px} .pb-gate-icon{ font-size:48px;margin-bottom:20px} .pb-gate-title{ font-size:20px;font-weight:700;color:#0f172a;margin:0 0 12px} .pb-gate-desc{ font-size:14px;color:#64748b;margin:0 0 24px} .pb-gate-btn{ display:inline-block;padding:10px 28px;background:var(--pb-accent);color:#fff;text-decoration:none;border-radius:6px;font-weight:700;font-size:14px;transition:background var(--pb-transition)} .pb-gate-btn:hover{ background:#2563eb} .pb-reader-info,.pb-lesson-empty{ padding:40px;color:#64748b;font-size:14px;text-align:center} .pb-lesson-nav{ display:flex;justify-content:space-between;margin-top:40px;padding-top:20px;border-top:1px solid #e2e8f0} .pb-lesson-nav__btn{ display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:#f1f5f9;border:1px solid #e2e8f0;border-radius:6px;color:#334155;font-size:13px;font-weight:600;cursor:pointer;text-decoration:none;transition:background var(--pb-transition)} .pb-lesson-nav__btn:hover{ background:#e2e8f0} .pb-lesson-nav__btn:disabled{ opacity:.4;cursor:not-allowed} .pb-submission-section{ margin-top:48px} .pb-submission-divider{ border:none;border-top:2px solid var(--pb-border,#e2e8f0);margin-bottom:0} .pb-submission-section__title{ font-size:17px;font-weight:700;color:var(--pb-text,#1e293b);margin:0 0 16px} .pb-submission-section .pb-submission-block{ border-top:none;border-radius:0 0 10px 10px} .pb-complete-btn{ display:block;width:100%;margin-top:28px;padding:12px;background:#22c55e;color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:700;cursor:pointer;text-align:center;transition:background var(--pb-transition)} .pb-complete-btn:hover{ background:#16a34a} .pb-complete-btn.is-done{ background:#86efac;cursor:default} .pb-reader__backdrop{ position:fixed;inset:0;background:rgba(15,23,42,0.6);z-index:150;opacity:0;pointer-events:none;transition:opacity var(--pb-transition)} .pb-reader__backdrop.is-visible{ opacity:1;pointer-events:auto} @media (max-width:767px){ .pb-reader__sidebar{ position:fixed;left:0;top:var(--pb-topbar-h);height:calc(100vh - var(--pb-topbar-h));z-index:200;transform:translateX(0);transition:transform var(--pb-transition);box-shadow:4px 0 16px rgba(0,0,0,.3)} .pb-reader__sidebar.is-collapsed{ width:var(--pb-sidebar-w);min-width:var(--pb-sidebar-w);transform:translateX(-100%);overflow:auto} .pb-reader__content{ padding:20px 16px;min-width:0} .pb-reader__sidebar-toggle{ padding:10px 12px;font-size:20px} .pb-view-toolbar{ display:none !important} .pb-reader__runtime-label{ display:none} .pb-sidebar__lesson{ padding:12px 20px 12px 28px;font-size:14px} .pb-sidebar__chapter-toggle{ padding:10px 16px} body.pb-drawer-open{ overflow:hidden} .pb-lesson-nav__btn{ padding:10px 14px;font-size:14px} .pb-complete-btn{ font-size:16px;padding:14px} } .pb-mini-submission{ position:relative;margin:40px 0;padding:32px;background:linear-gradient(135deg,#f8fafc 0%,#f1f5f9 100%);border:2px solid #e2e8f0;border-radius:16px;box-shadow:0 4px 20px rgba(15,52,96,0.06);transition:all var(--pb-transition)} .pb-mini-submission:hover{ border-color:#cbd5e1;box-shadow:0 8px 28px rgba(15,52,96,0.1)} .pb-mini-submission__header{ display:flex;align-items:flex-start;gap:16px;margin-bottom:24px;padding-bottom:20px;border-bottom:2px solid #e2e8f0} .pb-mini-submission__icon{ display:flex;align-items:center;justify-content:center;width:48px;height:48px;background:linear-gradient(135deg,#0f3460 0%,#1e4a7e 100%);border-radius:12px;font-size:24px;line-height:1;box-shadow:0 4px 12px rgba(15,52,96,0.25);flex-shrink:0} .pb-mini-submission__title-wrap{ flex:1} .pb-mini-submission__title{ font-size:18px;font-weight:800;color:#0f172a;margin:0 0 6px;letter-spacing:-0.01em} .pb-mini-submission__subtitle{ font-size:13px;color:#64748b;margin:0;line-height:1.5} .pb-mini-submission__time-badge{ display:inline-flex;align-items:center;gap:4px;padding:4px 12px;background:#fff;border:1px solid #e2e8f0;border-radius:999px;font-size:11px;font-weight:700;color:#64748b;flex-shrink:0} .pb-mini-submission__form{ display:flex;flex-direction:column;gap:20px} .pb-mini-submission__field{ display:flex;flex-direction:column;gap:10px} .pb-mini-submission__label{ font-size:14px;font-weight:700;color:#0f172a;margin:0} .pb-mini-submission__input,.pb-mini-submission__textarea{ width:100%;padding:14px 18px;background:#fff;border:2px solid #e2e8f0;border-radius:10px;font-size:15px;font-family:inherit;color:#1e293b;transition:all var(--pb-transition);outline:none} .pb-mini-submission__input:focus,.pb-mini-submission__textarea:focus{ border-color:#3b82f6;box-shadow:0 0 0 4px rgba(59,130,246,0.1)} .pb-mini-submission__input::placeholder,.pb-mini-submission__textarea::placeholder{ color:#94a3b8} .pb-mini-submission__textarea{ min-height:120px;resize:vertical;line-height:1.6} .pb-mini-submission__hint{ font-size:12px;color:#64748b;margin:-6px 0 0;line-height:1.5} .pb-mini-submission__submit{ display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:16px;background:linear-gradient(135deg,#0f3460 0%,#1e4a7e 100%);border:none;border-radius:10px;color:#fff;font-size:15px;font-weight:700;cursor:pointer;transition:all var(--pb-transition);box-shadow:0 4px 14px rgba(15,52,96,0.3);text-transform:none} .pb-mini-submission__submit:hover:not(:disabled){ transform:translateY(-2px);box-shadow:0 6px 20px rgba(15,52,96,0.4)} .pb-mini-submission__submit:active:not(:disabled){ transform:translateY(0)} .pb-mini-submission__submit:disabled{ opacity:0.6;cursor:not-allowed;transform:none} .pb-mini-submission__submit-icon{ font-size:18px;line-height:1} .pb-mini-submission__spinner{ display:inline-block;width:18px;height:18px;border:3px solid rgba(255,255,255,0.3);border-top-color:#fff;border-radius:50%;animation:pb-spin 0.8s linear infinite} @keyframes pb-spin{ to{ transform:rotate(360deg)} } .pb-mini-submission__status{ display:flex;align-items:center;gap:12px;padding:16px 20px;border-radius:10px;font-size:14px;font-weight:600;margin-top:16px;animation:pb-slide-in 0.3s ease} @keyframes pb-slide-in{ from{ opacity:0;transform:translateY(-10px)} to{ opacity:1;transform:translateY(0)} } .pb-mini-submission__status--success{ background:#f0fdf4;color:#15803d;border:2px solid #86efac} .pb-mini-submission__status--error{ background:#fff1f2;color:#be123c;border:2px solid #fda4af} .pb-mini-submission__status-icon{ font-size:20px;line-height:1;flex-shrink:0} .pb-mini-submission__status-text{ flex:1;line-height:1.5} .pb-mini-submission--completed{ background:linear-gradient(135deg,#f0fdf4 0%,#dcfce7 100%);border-color:#86efac} .pb-mini-submission--completed .pb-mini-submission__icon{ background:linear-gradient(135deg,#09825d 0%,#15803d 100%)} .pb-mini-submission--completed .pb-mini-submission__submit{ background:#86efac;color:#166534;cursor:default;box-shadow:none} .pb-mini-submission--completed .pb-mini-submission__submit:hover{ transform:none} .pb-mini-submission__score{ display:flex;align-items:center;justify-content:center;gap:12px;padding:20px;background:#fff;border:2px solid #e2e8f0;border-radius:12px;margin-top:16px} .pb-mini-submission__score-label{ font-size:14px;font-weight:700;color:#64748b} .pb-mini-submission__score-value{ font-size:32px;font-weight:900;background:linear-gradient(135deg,#0f3460 0%,#3b82f6 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1} .pb-mini-submission__score-max{ font-size:18px;color:#94a3b8;font-weight:700} .pb-mini-submission__feedback{ padding:16px 20px;background:#fffbeb;border-left:4px solid #f59e0b;border-radius:8px;margin-top:16px} .pb-mini-submission__feedback-title{ font-size:13px;font-weight:700;color:#92400e;margin:0 0 8px;text-transform:uppercase;letter-spacing:0.05em} .pb-mini-submission__feedback-text{ font-size:14px;color:#78350f;margin:0;line-height:1.6} .pb-mini-submission::before{ content:'';position:absolute;top:-2px;left:-2px;right:-2px;bottom:-2px;background:linear-gradient(135deg,#3b82f6,#8b5cf6,#ec4899,#3b82f6);background-size:300% 300%;border-radius:18px;opacity:0;z-index:-1;transition:opacity var(--pb-transition);animation:pb-gradient-shift 6s ease infinite} @keyframes pb-gradient-shift{ 0%,100%{ background-position:0% 50%} 50%{ background-position:100% 50%} } .pb-mini-submission:hover::before{ opacity:0.15} .pb-mini-submission--completed::before{ display:none} @media (max-width:767px){ .pb-mini-submission{ padding:24px 20px;margin:28px 0} .pb-mini-submission__header{ flex-direction:column;gap:12px} .pb-mini-submission__icon{ width:40px;height:40px;font-size:20px} .pb-mini-submission__title{ font-size:16px} .pb-mini-submission__subtitle{ font-size:12px} .pb-mini-submission__input,.pb-mini-submission__textarea{ padding:12px 16px;font-size:16px} .pb-mini-submission__submit{ padding:14px} .pb-mini-submission__score-value{ font-size:28px} } .pb-mini-submission__pending-review{ margin:8px 0 12px;text-align:center} .pb-mini-submission__pending-badge{ display:inline-block;padding:4px 12px;background:#fef9c3;color:#a16207;border-radius:6px;font-size:12px;font-weight:700} .pb-state-signal-bar{ padding:12px 14px 10px;border-bottom:1px solid var(--pb-sidebar-border,#e2e8f0);display:flex;flex-direction:column;gap:6px} .pb-state-signal{ font-size:11.5px;line-height:1.45;color:#64748b;padding:5px 9px;border-radius:6px;background:#f1f5f9;font-style:italic} .pb-state-signal--absence{ color:#1e40af;background:#eff6ff} .pb-state-signal--friction{ color:#92400e;background:#fffbeb} .pb-state-signal--phase{ color:#475569;background:#f8fafc;font-style:normal} .pb-sidebar__lesson.is-next-step{ border-left:2px solid var(--pb-accent,#7c3aed);padding-left:calc(var(--pb-sidebar-lesson-pl,16px) - 2px)} .pb-sidebar__lesson.is-next-step .pb-sidebar__lesson-title{ color:var(--pb-accent,#7c3aed)} [data-pb-embed="desk"].pb-reader{ min-height:0} [data-pb-embed="desk"] .pb-reader__topbar{ position:sticky;top:0;z-index:100;backdrop-filter:none} [data-pb-embed="desk"] .pb-reader__body{ overflow:visible} [data-pb-embed="desk"] .pb-reader__content{ overflow:visible;min-height:0;padding-top:32px} @media (min-width:768px){ [data-pb-embed="desk"] .pb-reader__sidebar{ position:sticky;top:var(--pb-topbar-h);height:calc(100vh - var(--pb-topbar-h));max-height:calc(100vh - var(--pb-topbar-h));min-height:0} } @media (min-width:768px) and (max-width:1100px){ .pb-reader__sidebar{ width:220px;min-width:220px} .pb-reader__content{ padding:40px 28px 72px} [data-pb-embed="desk"] .pb-reader__content{ padding:40px 28px 72px} }