.course-content .sd-quiz{--q-ok:var(--c-ok);--q-bad:var(--c-bad);margin:2.2rem 0;border:1px solid var(--c-line-strong);background:var(--c-surface);font-size:.94em;line-height:1.55}.course-content .sd-quiz[data-aced]{border-color:var(--c-signal)}.course-content .sd-quiz-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 12px;padding:8px 12px;border-bottom:1px solid var(--c-line);font-family:var(--sd-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase}.course-content .sd-quiz-tag{padding:2px 6px;background:var(--c-signal);color:var(--c-on-signal);font-weight:600}.course-content .sd-quiz-score{color:var(--c-fg-3);font-variant-numeric:tabular-nums}.course-content .sd-quiz[data-complete] .sd-quiz-score{color:var(--c-fg);font-weight:600}.course-content .sd-quiz-title{margin:0;padding:14px 16px 0;font-family:var(--sd-display);font-size:1.15em;font-weight:700;letter-spacing:-.02em;line-height:1.2;color:var(--c-fg)}.course-content .sd-quiz-qs{list-style:none;margin:0;padding:4px 16px}.course-content .sd-quiz-q{margin:0;padding:14px 0 16px;border-bottom:1px dashed var(--c-line)}.course-content .sd-quiz-q:last-child{border-bottom:0}.course-content .sd-quiz-prompt{margin:0 0 12px;font-weight:600;color:var(--c-fg)}.course-content .sd-quiz-qn{display:inline-block;margin-right:4px;padding:0 5px;border:1px solid var(--c-line-strong);font-family:var(--sd-mono);font-size:11px;font-weight:500;letter-spacing:.04em;line-height:18px;vertical-align:2px;color:var(--c-fg-3)}.course-content .sd-quiz-opts{list-style:none;margin:0;padding:0;display:grid;gap:8px}.course-content .sd-quiz-opt{margin:0}.course-content .sd-quiz-btn{display:flex;align-items:flex-start;gap:12px;width:100%;min-height:48px;padding:11px 12px;border:1px solid var(--c-line);background:var(--c-bg);color:var(--c-fg);font:inherit;text-align:left;cursor:pointer;transition:border-color .12s ease,background-color .12s ease,opacity .2s ease}.course-content .sd-quiz-btn:disabled{cursor:default;opacity:1}.course-content .sd-quiz:not([data-quiz-ready]) .sd-quiz-btn{border-color:transparent;background:transparent;min-height:0;padding:4px 0}.course-content .sd-quiz[data-quiz-ready] .sd-quiz-btn:not(:disabled):hover{border-color:var(--c-fg-4);background:var(--c-surface-2)}.course-content .sd-quiz-btn:focus-visible{outline:2px solid var(--c-signal);outline-offset:2px}.course-content .sd-quiz-key{flex:none;display:inline-grid;place-items:center;width:24px;height:24px;margin-top:1px;border:1px solid var(--c-line-strong);font-family:var(--sd-mono);font-size:12px;font-weight:600;line-height:1;color:var(--c-fg-2)}.course-content .sd-quiz-txt{flex:1 1 auto;min-width:0}.course-content .sd-quiz-mark{flex:none;align-self:center;font-family:var(--sd-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase}.course-content .sd-quiz-mark:empty{display:none}.course-content .sd-quiz-q:not([data-state=idle]) .sd-quiz-btn:not([data-picked]):not([data-correct]){opacity:.55}.course-content .sd-quiz-btn[data-correct]{border-color:var(--q-ok);background:color-mix(in srgb,var(--q-ok) 10%,transparent)}.course-content .sd-quiz-btn[data-correct] .sd-quiz-key{border-color:var(--q-ok);background:var(--q-ok);color:#000}.course-content .sd-quiz-btn[data-correct] .sd-quiz-mark{color:var(--q-ok)}.course-content .sd-quiz-btn[data-picked]:not([data-correct]){border-color:var(--q-bad);background:color-mix(in srgb,var(--q-bad) 10%,transparent)}.course-content .sd-quiz-btn[data-picked]:not([data-correct]) .sd-quiz-key{border-color:var(--q-bad);background:var(--q-bad);color:#fff}.course-content .sd-quiz-btn[data-picked]:not([data-correct]) .sd-quiz-mark{color:var(--c-bad-text)}.course-content .sd-quiz-q[data-state=wrong] .sd-quiz-btn[data-correct]:not([data-picked]){border-style:dashed;background:transparent}@keyframes sd-quiz-shake{0%,to{transform:translateX(0)}20%{transform:translateX(-6px)}40%{transform:translateX(5px)}60%{transform:translateX(-3px)}80%{transform:translateX(2px)}}@keyframes sd-quiz-glow{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--q-ok) 55%,transparent)}to{box-shadow:0 0 0 10px color-mix(in srgb,var(--q-ok) 0%,transparent)}}.course-content .sd-quiz-q[data-fresh][data-state=wrong] .sd-quiz-btn[data-picked]{animation:sd-quiz-shake .42s ease-in-out}.course-content .sd-quiz-q[data-fresh][data-state=right] .sd-quiz-btn[data-picked]{animation:sd-quiz-glow .7s ease-out}@media (prefers-reduced-motion:reduce){.course-content .sd-quiz-q[data-fresh] .sd-quiz-btn[data-picked]{animation:none}}.course-content .sd-quiz-status{margin:10px 0 0;font-family:var(--sd-mono);font-size:12px;letter-spacing:.04em}.course-content .sd-quiz-status:empty{display:none}.course-content .sd-quiz-q[data-state=right] .sd-quiz-status{color:var(--q-ok)}.course-content .sd-quiz-q[data-state=wrong] .sd-quiz-status{color:var(--c-bad-text)}.course-content .sd-quiz-why{margin:10px 0 0}.course-content .sd-quiz-why-sum{display:inline-flex;align-items:center;gap:6px;min-height:40px;cursor:pointer;list-style:none;font-family:var(--sd-mono);font-size:12px;letter-spacing:.04em;color:var(--c-fg-3)}.course-content .sd-quiz-why-sum::-webkit-details-marker{display:none}.course-content .sd-quiz-why-sum:before{content:"▸";color:var(--c-fg-4)}.course-content .sd-quiz-why[open]>.sd-quiz-why-sum:before{content:"▾"}.course-content .sd-quiz-why-sum:hover{color:var(--c-fg)}.course-content .sd-quiz-q[data-state=idle] .sd-quiz-why:not([open]) .sd-quiz-why-sum{color:var(--c-fg-4)}.course-content .sd-quiz-why-body{margin-top:4px;padding:2px 0 2px 14px;border-left:2px solid var(--c-line-strong);color:var(--c-fg-2)}.course-content .sd-quiz-why-body p{margin:0 0 .6em}.course-content .sd-quiz-why-body p:last-child{margin-bottom:0}.course-content .sd-quiz-answer{font-family:var(--sd-mono);font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--c-fg)}.course-content .sd-quiz[data-quiz-ready] .sd-quiz-q[data-state=idle] .sd-quiz-answer{color:var(--c-fg-3)}.course-content .sd-quiz-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 12px;padding:10px 16px 12px;border-top:1px solid var(--c-line)}.course-content .sd-quiz:not([data-started]) .sd-quiz-foot{display:none}.course-content .sd-quiz-result{font-family:var(--sd-mono);font-size:12px;letter-spacing:.04em;color:var(--c-fg-2)}.course-content .sd-quiz[data-aced] .sd-quiz-result{color:var(--c-signal-text);font-weight:600}.course-content .sd-quiz-retry{margin-left:auto}.course-content .sd-practice{margin:2rem 0;border:1px dashed var(--c-line-strong);background:var(--c-bg);font-size:15px;line-height:1.45}.course-content .sd-practice-quiz{margin:0;border-width:1px 0 0}.course-content .sd-practice-label{margin:0;padding:10px 16px 0;font-family:var(--sd-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--c-signal-text)}.course-content .sd-practice-list{list-style:none;margin:0;padding:8px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(240px,100%),1fr));gap:6px}.course-content .sd-practice-item{margin:0}.course-content .sd-practice-link{display:grid;grid-template-columns:1fr auto;gap:2px 12px;height:100%;padding:10px;border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-fg);text-decoration:none}.course-content .sd-practice-link:hover{border-color:var(--c-signal);color:var(--c-fg)}.course-content .sd-practice-kind{grid-column:1/-1;font-family:var(--sd-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--c-fg-3)}.course-content .sd-practice-name{font-family:var(--sd-display);font-size:18px;font-weight:700;letter-spacing:-.02em}.course-content .sd-practice-go{grid-row:2/span 2;grid-column:2;align-self:end;font-family:var(--sd-mono);font-size:12px;color:var(--c-signal-text)}.course-content .sd-practice-hook{font-size:14px;color:var(--c-fg-3)}