.learn-shell{--learn-line:var(--accent);--learn-line-weak:#a9a49c;--learn-node:var(--paper-raised,#fbfaf8);padding:3rem 0 5rem}.learn-head{max-width:44rem;margin-bottom:2.5rem}.learn-head h1{word-break:keep-all;margin:.5rem 0 1rem;font-size:clamp(1.8rem,4.2vw,2.6rem);line-height:1.35}.learn-question{color:var(--ink-soft);word-break:keep-all;margin:0;font-size:1.08rem;line-height:1.8}.learn-byline{margin:1.6rem 0 0}.learn-byline-meta{color:var(--ink-faint,#8b867e);flex-wrap:wrap;gap:.5rem;margin:0 0 .7rem;font-size:.86rem;display:flex}.learn-byline-meta span{white-space:nowrap}.learn-byline-meta a{color:var(--ink);font-weight:600;text-decoration:none}.learn-byline-meta a:hover{text-decoration:underline}.learn-byline-role{font-weight:400}.learn-byline-disclosure{border-left:2px solid var(--border);color:var(--ink-soft);word-break:keep-all;margin:0;padding:.85rem 1rem;font-size:.88rem;line-height:1.75}.learn-byline-disclosure strong{color:var(--ink);font-weight:700}.learn-lead{max-width:42rem;margin-bottom:3.5rem}.learn-lead p{color:var(--ink);word-break:keep-all;margin:0 0 1.1rem;font-size:1.06rem;line-height:1.95}.learn-lead strong{font-weight:700}.learn-section{max-width:42rem;margin-bottom:3.5rem}.learn-section h2{word-break:keep-all;border-top:1px solid var(--border);margin:0 0 1.2rem;padding-top:1.2rem;font-size:1.35rem;line-height:1.45}.learn-section p{color:var(--ink-soft);word-break:keep-all;margin:0 0 1.1rem;line-height:1.95}.learn-section strong{color:var(--ink);font-weight:700}.learn-figure{margin:2rem 0 2.2rem}.learn-figure-svg{width:100%;max-width:30rem;height:auto;margin:0 auto;display:block}.learn-figure figcaption{text-align:center;color:var(--ink-faint);word-break:keep-all;margin-top:.9rem;font-size:.88rem;line-height:1.7}.learn-figure-label{fill:var(--ink);font-size:15px;font-weight:700}.learn-figure-sub{fill:var(--ink-faint);font-size:11.5px}.learn-figure-slot{fill:var(--ink-faint);font-size:13px}.learn-figure-need{fill:var(--accent);font-size:11.5px;font-weight:700}.learn-figure-need.is-time{fill:var(--ink-faint)}.learn-note{border-left:3px solid var(--accent);background:var(--paper);border-radius:0 10px 10px 0;margin:1.8rem 0;padding:1.3rem 1.5rem}.learn-note strong{margin-bottom:.5rem;font-size:.98rem;display:block}.learn-note p{color:var(--ink-soft);margin:0;font-size:.94rem;line-height:1.8}.learn-study{background:var(--accent-pale);border:1px solid var(--accent-soft);border-radius:4px;max-width:42rem;margin:0 0 3.5rem;padding:1.4rem 1.5rem}.learn-study-kicker{letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 .4rem;font-size:.76rem}.learn-study-title{word-break:keep-all;margin:0 0 1.1rem;font-size:1.02rem;font-weight:700;line-height:1.6}.learn-study-metrics{margin:0}.learn-study-metrics>div{border-top:1px solid var(--accent-soft);grid-template-columns:1fr auto;align-items:baseline;gap:.9rem;padding:.7rem 0;display:grid}.learn-study-metrics dt{color:var(--ink-soft);word-break:keep-all;font-size:.92rem;line-height:1.65}.learn-study-metrics dd{font-family:var(--font-mono);color:var(--accent);font-variant-numeric:tabular-nums;white-space:nowrap;margin:0;font-size:1.15rem;font-weight:700}.learn-study-source{border-top:1px solid var(--accent-soft);color:var(--ink-soft);word-break:keep-all;margin:1.1rem 0 0;padding-top:.9rem;font-size:.88rem;line-height:1.75}.learn-study-source a{color:var(--ink);font-weight:600;text-decoration:none}.learn-study-source a:hover{text-decoration:underline}@media (max-width:520px){.learn-study-metrics>div{grid-template-columns:1fr;gap:.25rem}.learn-study-metrics dd{text-align:left}}.learn-limits ul{margin:0;padding-left:1.1rem}.learn-limits li{color:var(--ink-soft);word-break:keep-all;margin-bottom:.7rem;line-height:1.85}.learn-faq details{border-bottom:1px solid var(--border)}.learn-faq summary{cursor:pointer;word-break:keep-all;padding:1rem 0;font-weight:600;line-height:1.6;list-style:none}.learn-faq summary::-webkit-details-marker{display:none}.learn-faq summary:before{content:"＋ ";color:var(--ink-faint)}.learn-faq details[open] summary:before{content:"－ "}.learn-faq details p{color:var(--ink-soft);word-break:keep-all;margin:0 0 1.2rem;line-height:1.9}.learn-more{max-width:42rem;margin-top:3rem}.learn-more h2{margin:0 0 .8rem;font-size:1.1rem}.learn-more ul{margin:0;padding:0;list-style:none}.learn-more li{border-top:1px solid var(--border);padding:.7rem 0}.learn-more a{color:var(--accent);word-break:keep-all;text-decoration:none}.learn-more a:hover{text-decoration:underline}@media (max-width:760px){.learn-figure-svg{max-width:100%}}.learn-shell{isolation:isolate;position:relative}.learn-shell>:not(.page-scenery){z-index:1;position:relative}.learn-group{margin-bottom:3.5rem}.learn-group-head{margin-bottom:1.2rem}.learn-group-head h2{border-top:1px solid var(--border);margin:0 0 .3rem;padding-top:1.2rem;font-size:1.3rem;line-height:1.4}.learn-group-head p{color:var(--ink-faint);word-break:keep-all;margin:0;font-size:.92rem;line-height:1.7}.learn-group .tool-card h3{word-break:keep-all;margin:0;font-size:1.1rem;line-height:1.45}.learn-answer{border-left:3px solid var(--accent);background:var(--paper-raised,#f4f3f0);max-width:42rem;color:var(--ink);word-break:keep-all;margin:0 0 2rem;padding:1.1rem 1.3rem;font-size:1.05rem;line-height:1.9}.learn-answer strong{font-weight:700}.learn-index-head{justify-content:space-between;align-items:end;gap:2rem;margin-bottom:1.2rem;display:flex}.learn-index-head h2{margin:0;font-size:1.45rem}.learn-index-head>p{max-width:25rem;color:var(--ink-faint);margin:0;line-height:1.7}.learn-category-kicker{color:var(--accent);font:700 .72rem/1.4 var(--font-mono);letter-spacing:.08em;margin:0 0 .5rem}.learn-category-index{margin-bottom:4rem}.learn-category-grid{background:var(--border-strong);border:1px solid var(--border-strong);grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;display:grid}.learn-category-card{background:var(--paper-raised);flex-direction:column;min-height:22rem;padding:1.5rem;display:flex}.learn-category-card h3{margin:0 0 .8rem;font-size:1.45rem}.learn-category-card h3 a{color:var(--ink);text-decoration:none}.learn-category-card h3 a:hover{color:var(--accent)}.learn-category-card>p:not(.learn-category-kicker):not(.learn-category-tool){color:var(--ink-soft);margin:0;line-height:1.8}.learn-category-hub{color:var(--ink);margin-top:1.35rem;font-weight:700;line-height:1.65;text-decoration:none;display:block}.learn-category-hub:hover,.learn-category-tool a:hover{color:var(--accent);text-decoration:underline}.learn-category-tool{color:var(--ink-faint);margin:.7rem 0 0;font-size:.84rem;line-height:1.6}.learn-category-tool a{color:var(--accent);text-decoration:none}.learn-category-action{color:var(--accent);margin-top:auto;padding-top:1.35rem;font-weight:700;text-decoration:none;display:inline-block}.learn-category-action:hover{text-decoration:underline}.learn-bridge{margin-bottom:4rem}.learn-bridge-list{border-top:1px solid var(--border);grid-template-columns:repeat(2,minmax(0,1fr));gap:0;margin:0;padding:0;list-style:none;display:grid}.learn-bridge-list li{border-bottom:1px solid var(--border)}.learn-bridge-list a{color:var(--ink);padding:1rem 0;text-decoration:none;display:block}.learn-bridge-list a:hover{color:var(--accent)}.learn-bridge-list strong,.learn-bridge-list span{display:block}.learn-bridge-list strong{margin-bottom:.25rem}.learn-bridge-list span{color:var(--ink-faint);font-size:.88rem;line-height:1.6}.learn-more-category{margin:-.3rem 0 1rem}.learn-more-category a{color:var(--accent);font-weight:700;text-decoration:none}.learn-category-featured{border-left:4px solid var(--accent);background:var(--paper-raised);max-width:52rem;margin:0 0 4rem;padding:1.8rem 2rem}.learn-category-featured h2{margin:0 0 .6rem;font-size:1.55rem}.learn-category-featured h2 a{color:var(--ink);text-decoration:none}.learn-category-featured h2 a:hover{color:var(--accent)}.learn-category-featured>p:not(.learn-category-kicker){color:var(--ink-soft);margin:0;line-height:1.8}.learn-category-featured .learn-category-action{margin-top:1rem;padding-top:0}.learn-category-section{margin-bottom:3.5rem}.learn-category-section-head{border-top:1px solid var(--border);align-items:baseline;gap:.7rem;margin-bottom:1.2rem;padding-top:1.2rem;display:flex}.learn-category-section-head h2{margin:0;font-size:1.3rem}.learn-category-section-head span{color:var(--ink-faint);font:700 .72rem/1 var(--font-mono)}.learn-category-tools{margin-top:1rem}.learn-category-back{border-top:1px solid var(--border);padding-top:1rem;margin-top:1.5rem!important}.learn-category-back a{color:var(--accent);font-weight:700}@media (max-width:760px){.learn-index-head{display:block}.learn-index-head>p{margin-top:.65rem}.learn-category-grid{grid-template-columns:1fr}.learn-category-card{min-height:auto}.learn-bridge-list{grid-template-columns:1fr}.learn-category-featured{padding:1.35rem 1.2rem}}