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

.legacy-content .lesson-header .kicker {color:var(--ds)}.legacy-content .l-callout b {color:var(--ds)}.legacy-content .ds-table-wrap {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-card);overflow-x:auto}.legacy-content .ds-table {width:100%;border-collapse:collapse;min-width:760px}.legacy-content .ds-table th {font-size:11.5px;font-weight:800;letter-spacing:.5px;color:var(--sub);text-align:left;padding:12px 14px;border-bottom:1.5px solid var(--border);background:rgba(0,0,0,.015);white-space:nowrap}.legacy-content .ds-table td {font-size:13px;color:var(--sub);line-height:1.65;padding:13px 14px;border-bottom:1px solid var(--border);vertical-align:top}.legacy-content .ds-table tr:last-child td {border-bottom:none}.legacy-content .ds-table tbody tr {transition:background .15s}.legacy-content .ds-table tbody tr:hover {background:var(--ds-soft)}.legacy-content .ds-table .st-name {font-size:14px;font-weight:800;color:var(--text);white-space:nowrap}.legacy-content .ds-table .st-name .ic {margin-right:6px}.legacy-content .ds-table .st-motto {font-weight:700;color:var(--ds-deep);white-space:nowrap}.legacy-content .ds-table .st-good {color:var(--success);font-weight:600}.legacy-content .ds-table .st-bad {color:var(--danger);font-weight:600}.legacy-content .ds-table .st-ai b {color:var(--text)}.legacy-content .ds-table .st-lesson {font-size:11.5px;font-weight:800;color:var(--ds);background:var(--ds-soft);border-radius:99px;padding:2px 10px;white-space:nowrap}.legacy-content .ds-table .st-sub {display:block;font-size:11px;color:var(--sub);font-weight:600;margin-top:3px}.legacy-content .table-hint {font-size:12px;color:var(--sub);font-weight:600;margin-top:9px}.legacy-content .pick-grid {display:grid;grid-template-columns:repeat(4,1fr);gap:11px}.legacy-content .pick-card {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:15px 14px;box-shadow:var(--shadow-card);cursor:pointer;transition:border-color .15s,transform .15s,box-shadow .15s;text-align:left;font-family:inherit;position:relative}.legacy-content .pick-card:hover {border-color:var(--ds-line);transform:translateY(-2px)}.legacy-content .pick-card.active {border-color:var(--ds);box-shadow:0 0 0 2px var(--ds-line)}.legacy-content .pick-card.seen::after {content:'✓';position:absolute;top:8px;right:10px;font-size:12px;font-weight:900;color:var(--success)}.legacy-content .pick-card .pk-icon {font-size:22px;margin-bottom:6px}.legacy-content .pick-card .pk-text {font-size:13px;font-weight:700;color:var(--text);line-height:1.55}.legacy-content .pick-reveal {margin-top:14px;background:var(--card);border:1.5px solid var(--ds-line);border-radius:var(--radius);padding:18px 22px;box-shadow:var(--shadow-card);opacity:0;transform:translateY(6px);transition:opacity .3s,transform .3s;min-height:0}.legacy-content .pick-reveal.show {opacity:1;transform:translateY(0)}.legacy-content .pick-reveal .pr-answer {display:flex;align-items:center;gap:10px;margin-bottom:8px}.legacy-content .pick-reveal .pr-answer .pr-ic {font-size:26px}.legacy-content .pick-reveal .pr-answer .pr-name {font-size:17px;font-weight:900;color:var(--ds-deep)}.legacy-content .pick-reveal .pr-why {font-size:13.5px;color:var(--sub);line-height:1.8}.legacy-content .pick-reveal .pr-why b {color:var(--text)}.legacy-content .pick-reveal .pr-ai {margin-top:10px;font-size:12.5px;font-weight:700;color:var(--ds-deep);background:var(--ds-soft);border-radius:var(--radius-sm);padding:9px 14px}.legacy-content .pick-done {margin-top:14px;padding:15px 20px;background:linear-gradient(135deg,#f0fdf4,#dcfce7);border:1.5px solid #bbf7d0;border-radius:var(--radius);font-size:14px;font-weight:700;color:#166534;line-height:1.8;opacity:0;transform:translateY(6px);transition:opacity .4s,transform .4s;display:none}.legacy-content .pick-done.show {display:block;opacity:1;transform:translateY(0)}.legacy-content .pick-progress {font-size:12.5px;color:var(--sub);font-weight:600;margin-top:10px}.legacy-content .pick-progress b {color:var(--ds)}.legacy-content .quiz-list {display:flex;flex-direction:column;gap:12px}.legacy-content .quiz-card {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:17px 20px;box-shadow:var(--shadow-card)}.legacy-content .quiz-q {font-size:14.5px;font-weight:800;color:var(--text);margin-bottom:11px;line-height:1.6}.legacy-content .quiz-q .qn {color:var(--ds);margin-right:6px}.legacy-content .quiz-opts {display:flex;gap:9px;flex-wrap:wrap}.legacy-content .quiz-opt {border:1.5px solid var(--border);background:var(--card);border-radius:999px;padding:7px 20px;font-size:13.5px;font-weight:700;color:var(--text);cursor:pointer;font-family:inherit;transition:all .15s}.legacy-content .quiz-opt:hover:not(:disabled) {border-color:var(--ds-line)}.legacy-content .quiz-opt:disabled {cursor:default;opacity:.55}.legacy-content .quiz-opt.right {background:rgba(22,163,74,.12);border-color:var(--success);color:#15803d;opacity:1}.legacy-content .quiz-opt.wrong {background:rgba(220,38,38,.1);border-color:var(--danger);color:var(--danger);opacity:1}.legacy-content .quiz-exp {font-size:12.5px;color:var(--sub);line-height:1.75;margin-top:10px;padding-top:10px;border-top:1px dashed var(--border);display:none}.legacy-content .quiz-exp.show {display:block}.legacy-content .quiz-exp b {color:var(--ds-deep)}.legacy-content .quiz-exp .verdict-ok {color:var(--success);font-weight:800}.legacy-content .quiz-exp .verdict-no {color:var(--danger);font-weight:800}.legacy-content .quiz-score {margin-top:14px;padding:15px 20px;background:var(--ds-soft);border:1.5px dashed var(--ds-line);border-radius:var(--radius);font-size:14px;font-weight:700;color:var(--ds-deep);line-height:1.8;display:none}.legacy-content .quiz-score.show {display:block}.legacy-content .takeaway-box {background:linear-gradient(135deg,#f0f9ff,#e0f2fe);border:1.5px solid #bae6fd;border-radius:var(--radius);padding:24px 28px;margin-top:36px}.legacy-content .takeaway-box h3 {font-size:17px;font-weight:800;color:var(--ds-deep);margin-bottom:10px}.legacy-content .takeaway-box ul {list-style:none;padding:0;margin:0}.legacy-content .takeaway-box li {font-size:14.5px;color:#0c4a6e;line-height:1.8;padding:4px 0 4px 22px;position:relative}.legacy-content .takeaway-box li::before {content:'';position:absolute;left:0;top:13px;width:8px;height:8px;border-radius:50%;background:var(--ds)}@media (max-width:768px){.legacy-content .pick-grid {grid-template-columns:1fr 1fr}.legacy-content .quiz-opts {flex-direction:column}.legacy-content .quiz-opt {text-align:center}}

.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)}