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var(--border);border-radius:var(--radius);width:100%;height:min(78vh,900px);position:relative;overflow:hidden}.viewer-frame{border:0;width:100%;height:100%;display:block}.viewer-loading{flex-direction:column;justify-content:center;align-items:center;gap:10px;display:flex;position:absolute;inset:0}.viewer-fallback{text-align:center;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;justify-content:center;align-items:center;gap:12px;height:min(78vh,900px);padding:24px;display:flex}.spinner{border:3px solid var(--border-strong);border-top-color:var(--primary);border-radius:50%;width:28px;height:28px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.spinner{animation:none}.nav-card:hover{transform:none}}.split-details{align-self:start}.detail-table{flex-direction:column;display:flex}.detail-row{border-block-end:1px solid var(--border);grid-template-columns:96px 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(max-width:860px){.split-viewer{grid-template-columns:1fr}.split-embed{position:static}.viewer-frame-wrap,.viewer-fallback{height:70vh}}.hero-sub{color:#fff;font-size:clamp(1.15rem,2.4vw,1.6rem);font-family:var(--font-display);max-width:640px;margin-inline:auto;font-weight:600;line-height:1.7}.hero-cta{flex-wrap:wrap;justify-content:center;gap:16px;display:flex}.landing-band{background:var(--surface-2);padding-block:56px}.landing-band-title{text-align:center;color:var(--text);margin-block-end:40px;padding-block-end:14px;position:relative}.landing-band-title:after{content:"";bottom:0;background:linear-gradient(90deg, var(--primary), var(--accent));border-radius:2px;width:52px;height:3px;position:absolute;inset-inline-start:50%;transform:translate(50%)}.feature-card{background:var(--surface);border-radius:var(--radius-lg);border:1px solid var(--border);padding:28px;transition:box-shadow .3s,transform 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var(--primary);text-align:center;padding:20px;font-family:IBM Plex Mono,ui-monospace,monospace;font-size:1.1rem}.feedback-panel{border-radius:var(--radius);margin-block-start:8px;padding:20px}.feedback-ok{background:var(--success-soft);border-inline-start:4px solid var(--success);color:#065f46}.feedback-bad{background:var(--danger-soft);border-inline-start:4px solid var(--danger);color:#991b1b}.feedback-info{background:var(--primary-soft);border-inline-start:4px solid var(--primary);color:var(--primary-700)}.feedback-warm{background:var(--warning-soft);border-inline-start:4px solid var(--warning);color:#92400e}.feedback-panel .fb-icon{font-size:1.4rem}.feedback-panel .fb-title{margin-block:6px 4px;font-weight:700}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;display:grid}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px}.stat-card .stat-num{font-family:var(--font-display);color:var(--primary);font-size:2.2rem;font-weight:700;line-height:1.1}.stat-card .stat-label{color:var(--text-muted);margin-block-start:4px;font-size:.85rem}.stat-card.accent{border-block-start:3px solid var(--accent)}@media (max-width:860px){.task-pane{grid-template-columns:1fr}.task-side{position:static}}.question-block{border-block-end:1px solid var(--border);padding-block-end:20px}.question-block:last-of-type{border-block-end:0;padding-block-end:0}.grade-high{color:var(--success);font-weight:700}.grade-mid{color:var(--warning);font-weight:700}.grade-low{color:var(--danger);font-weight:700}.status-completed{background:var(--success-soft);color:#065f46}.status-pending{background:var(--warning-soft);color:#92400e}.status-overdue{background:var(--danger-soft);color:#991b1b}.insight-item{background:var(--surface-2);border-inline-start:4px solid var(--primary);border-radius:var(--radius-sm);margin-block-end:10px;padding:14px 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#0284c74d}.practice-gate-icon{flex:none;font-size:2.4rem;line-height:1}.practice-gate-main{flex:auto}.practice-gate-title{font-family:var(--font-display);color:#fff;font-size:1.6rem;font-weight:700}.practice-gate-sub{color:#ffffffe6;margin-top:2px;font-size:.95rem}.practice-gate-arrow{color:#fff;flex:none;font-size:1.6rem}@media (prefers-reduced-motion:reduce){.practice-gate:hover{transform:none}}.nav-card.grade-accent{border-block-start:3px solid var(--grade-color,var(--primary))}.about-hero{flex-wrap:wrap;align-items:center;gap:22px;display:flex}.about-portrait{background:var(--primary-soft);border:1px solid var(--border);border-radius:50%;flex:none;justify-content:center;align-items:center;width:96px;height:96px;display:flex}.about-intro{flex:auto;min-width:200px}.about-role{font-family:var(--font-display);color:var(--primary);margin:4px 0 2px;font-size:1.05rem;font-weight:600}.detail-hierarchy{flex-wrap:wrap;align-items:baseline;gap:8px 12px;margin-block-end:14px;display:flex}.dh-grade{font-family:var(--font-display);color:var(--grade-color,var(--primary));border-radius:var(--radius-sm);background:color-mix(in srgb, var(--grade-color,var(--primary)) 10%, transparent);padding:2px 12px;font-size:1.5rem;font-weight:700;text-decoration:none}.dh-grade:hover{filter:brightness(.92);text-decoration:none}.dh-domain{color:var(--primary-600);font-size:1.05rem;font-weight:600;text-decoration:none}.dh-domain:hover{text-decoration:underline}.dh-domain-static{color:var(--text-muted);font-weight:500}@keyframes raz-fade-up{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}.hero .inner{animation:.55s both raz-fade-up}.reveal{opacity:0;transition:opacity .6s,transform .6s;transform:translateY(22px)}.reveal.revealed{opacity:1;transform:none}@media (prefers-reduced-motion:reduce){.hero .inner{animation:none}.reveal{opacity:1;transition:none;transform:none}}.floating-wa{bottom:20px;z-index:60;color:#fff;background:#25d366;border-radius:50%;justify-content:center;align-items:center;width:52px;height:52px;transition:transform .25s,box-shadow .25s;display:inline-flex;position:fixed;inset-inline-end:20px;box-shadow:0 8px 20px #00000040}.floating-wa:hover{color:#fff;text-decoration:none;transform:translateY(-3px);box-shadow:0 12px 26px #0000004d}@media (prefers-reduced-motion:reduce){.floating-wa:hover{transform:none}}.footer-contact-row{color:var(--text-faint);align-items:center;gap:9px;margin-block-end:8px;display:flex}.footer-contact-row svg{color:#7dd3fc;flex:none}.topbar-contacts{align-items:center;gap:16px;display:flex}.social-row{flex-wrap:wrap;gap:10px;margin-block-start:4px;display:flex}.social-btn{color:#d6d6d4;background:#ffffff14;border:1px solid #ffffff24;border-radius:50%;justify-content:center;align-items:center;width:38px;height:38px;transition:background .25s,color .25s,transform .25s;display:inline-flex}.social-btn:hover{background:var(--primary);color:#fff;text-decoration:none;transform:translateY(-2px)}.social-labeled{flex-direction:column;gap:8px;display:flex}.social-labeled-row{color:var(--primary-600);align-items:center;gap:10px;width:fit-content;padding:6px 4px;font-weight:500;display:inline-flex}.social-labeled-row:hover{color:var(--primary);text-decoration:none}.social-labeled-row .social-ico{background:var(--primary-soft);width:34px;height:34px;color:var(--primary);border-radius:50%;flex:none;justify-content:center;align-items:center;display:inline-flex}