@keyframes _si{from{opacity:0}to{opacity:1}}

.legacy-content .lesson-header .kicker {color:var(--al)}.legacy-content .iq-intro {background:var(--card);border:1.5px solid var(--border);border-radius:12px;padding:18px 22px;margin-bottom:28px}.legacy-content .iq-intro-title {font-size:15px;font-weight:800;color:var(--text);margin-bottom:10px}.legacy-content .iq-intro-lead {font-size:14px;color:var(--sub);line-height:1.7;margin-bottom:12px}.legacy-content .iq-role-rows {display:flex;flex-direction:column;gap:8px;margin-bottom:12px}.legacy-content .iq-role-row {display:flex;align-items:baseline;gap:10px;padding:9px 13px;border-radius:9px;font-size:14px;line-height:1.6}.legacy-content .iq-role-row .rr-name {font-weight:800;flex-shrink:0;white-space:nowrap}.legacy-content .iq-role-row .rr-desc {color:var(--sub)}.legacy-content .iq-intro-foot {font-size:14px;color:var(--sub);line-height:1.7}.legacy-content .iq-intro-foot strong {color:var(--text)}.legacy-content .iq-card {background:var(--card);border:1.5px solid var(--border);border-radius:14px;padding:22px 24px;margin-bottom:22px;box-shadow:var(--shadow-card)}.legacy-content .iq-head {display:flex;align-items:center;gap:10px;margin-bottom:12px}.legacy-content .iq-num {font-size:13px;font-weight:900;color:var(--sub);letter-spacing:.5px;font-family:"SF Mono","Fira Code",Menlo,monospace}.legacy-content .iq-who {font-size:12px;font-weight:800;padding:3px 11px;border-radius:99px;letter-spacing:.3px}.legacy-content .iq-q {font-size:17.5px;font-weight:800;color:var(--text);line-height:1.55;margin-bottom:16px}.legacy-content .iq-block {margin-bottom:14px}.legacy-content .iq-label {display:flex;align-items:center;gap:6px;font-size:12px;font-weight:800;letter-spacing:.5px;margin-bottom:6px}.legacy-content .iq-intent .iq-label {color:var(--amber)}.legacy-content .iq-intent .iq-body {font-size:14px;color:var(--sub);line-height:1.75;background:rgba(217,119,6,.05);border:1px solid rgba(217,119,6,.14);border-radius:9px;padding:10px 14px}.legacy-content .iq-intent .iq-body strong {color:var(--text)}.legacy-content .iq-frame .iq-label {color:var(--accent)}.legacy-content .iq-frame ol {margin:0;padding-left:0;list-style:none;counter-reset:iqstep;display:flex;flex-direction:column;gap:7px}.legacy-content .iq-frame li {counter-increment:iqstep;position:relative;padding:9px 13px 9px 40px;background:rgba(0,102,255,.04);border:1px solid rgba(0,102,255,.1);border-radius:9px;font-size:14px;color:var(--sub);line-height:1.65}.legacy-content .iq-frame li::before {content:counter(iqstep);position:absolute;left:12px;top:10px;width:19px;height:19px;border-radius:50%;background:var(--accent);color:#fff;font-size:11.5px;font-weight:800;display:flex;align-items:center;justify-content:center}.legacy-content .iq-frame li strong {color:var(--text)}.legacy-content .iq-bonus {font-size:13.5px;color:var(--text);line-height:1.7;background:rgba(22,163,74,.06);border:1px solid rgba(22,163,74,.18);border-radius:9px;padding:10px 14px;margin-bottom:14px}.legacy-content .iq-bonus b {color:var(--success);font-weight:800;margin-right:4px}.legacy-content .iq-refs {display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;padding-top:12px;border-top:1px dashed var(--border)}.legacy-content .iq-refs-label {font-size:12px;font-weight:700;color:var(--sub);flex-shrink:0}.legacy-content .iq-refs a {font-size:12.5px;font-weight:700;color:var(--accent);text-decoration:none;background:rgba(0,102,255,.07);padding:4px 11px;border-radius:99px;transition:background .15s}.legacy-content .iq-refs a:hover {background:rgba(0,102,255,.14)}.legacy-content .who-hr {background:rgba(0,102,255,.1);color:var(--accent)}.legacy-content .who-boss {background:rgba(217,119,6,.12);color:var(--amber)}.legacy-content .who-dev {background:rgba(124,58,237,.1);color:var(--purple)}@media (max-width:768px){.legacy-content .iq-card {padding:18px 16px}.legacy-content .iq-q {font-size:16px}}

.legacy-content .xa-tldr {margin:18px 0 4px;padding:14px 18px;background:rgba(0,102,255,0.04);border:1px solid rgba(0,102,255,0.16);border-radius:10px}.legacy-content .xa-tldr .xa-tldr-tag {display:block;font-size:11px;font-weight:800;letter-spacing:1px;color:var(--accent,#0066ff);margin-bottom:6px}.legacy-content .xa-tldr p {margin:0;font-size:15px;line-height:1.8;color:var(--text,#1f2937)}