.learn-page{margin:0;background:var(--paper,#f5f5f7);color:var(--ink,#1d1d1f);font:14px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
.learn-page *{box-sizing:border-box}.learn-main a,.learn-topbar a{color:var(--green,#0066cc);text-underline-offset:4px}.learn-page .app-sidebar a{text-decoration:none}.learn-page h1,.learn-page h2,.learn-page h3,.learn-page p{margin:0}.learn-page h1{font-size:38px;line-height:1.16;letter-spacing:-.04em;font-weight:650}.learn-page h1 br{display:block}.learn-page h2{font-size:22px;line-height:1.3;letter-spacing:-.025em;font-weight:650}
.learn-skip:not(:focus){position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.learn-skip:focus{position:fixed;top:12px;left:260px;background:white;padding:12px;z-index:200}
.learn-topbar{display:flex;align-items:center;justify-content:flex-end;gap:20px;margin-inline:auto}.learn-page .app-page-label{margin-right:auto}.learn-main{max-width:1120px;margin:auto;padding:42px 36px 24px;min-width:0}.learn-intro{max-width:630px;margin-bottom:30px}.learn-eyebrow{font-size:11px;letter-spacing:.1em;font-weight:650;color:#5e5e64;margin-bottom:10px!important}.learn-intro>p:last-child{color:#5e5e64;font-size:16px;margin-top:16px;max-width:560px}
.learn-topbar>a{display:inline-flex;align-items:center;min-height:44px}
.learn-practice{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:40px;padding:30px 32px;margin-bottom:44px;border:1px solid #dcdce2;border-radius:12px;background:#eef4ff}.learn-practice p{color:#5e5e64;max-width:570px;margin:12px 0 20px}.learn-pill{display:inline-block;color:#5e5e64;font-size:12px;margin-bottom:12px}.learn-button{display:inline-flex;align-items:center;justify-content:center;gap:14px;min-height:44px;padding:11px 18px;border:1px solid #0066cc;border-radius:8px;background:#0066cc;color:white!important;text-decoration:none!important;font-size:13px;font-weight:600;line-height:1.5;transition:background 160ms,transform 160ms}.learn-button:hover{background:#0055aa}.learn-button:active{transform:translateY(1px)}.learn-practice>ol{list-style:none;margin:0;padding:0;align-self:center;display:grid;gap:12px}.learn-practice>ol>li{display:flex;align-items:center;gap:14px;min-height:44px}.learn-practice>ol span{display:inline-flex;justify-content:center;align-items:center;width:32px;height:32px;border:1px solid #b8c6d8;border-radius:50%;font-size:11px;color:#5e5e64}.learn-practice>ol b{font-size:13px;font-weight:600}
.learn-section-heading{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:20px}.learn-section-heading>p{font-size:13px;color:#5e5e64}.learn-lessons>details{border-top:1px solid #dcdce2;scroll-margin-top:100px}.learn-lessons>details:last-child{border-bottom:1px solid #dcdce2}.learn-lessons summary{display:flex;align-items:center;gap:18px;padding:22px 4px;min-height:88px;cursor:pointer;list-style:none}.learn-lessons summary::-webkit-details-marker{display:none}.learn-number{font-size:12px;color:#5e5e64;align-self:start;padding-top:3px}.learn-lessons summary b{display:block;font-size:16px;font-weight:600;line-height:1.4}.learn-lessons summary small{display:block;font-size:13px;color:#5e5e64;margin-top:3px;line-height:1.6}.learn-plus{margin-left:auto;font-size:22px;color:#0066cc}.learn-plus::before{content:"+"}.learn-lessons details[open] .learn-plus::before{content:"−"}.learn-lesson-body{padding:0 38px 28px;max-width:820px}.learn-lesson-body>p{margin-bottom:18px}.learn-lesson-body>ol{padding-left:22px;margin:18px 0 22px;display:grid;gap:12px}.learn-note,.learn-example{background:#eef4ff;border-left:3px solid #6d9bd0;padding:16px 18px;margin:20px 0}.learn-note b{font-size:14px}.learn-note p{color:#5e5e64;margin-top:6px}.learn-example>span{font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:#5e5e64}.learn-example>p{margin-top:5px}.learn-tip{color:#5e5e64}.learn-tip b{color:#1d1d1f}.learn-actions{display:flex;flex-wrap:wrap;gap:12px 22px;align-items:center;margin-top:22px}.learn-actions>a{min-height:44px;display:inline-flex;align-items:center;font-size:13px}
.learn-terms{margin-top:44px}.learn-terms dl{display:grid;grid-template-columns:1fr 1fr;gap:0 32px;margin:0}.learn-terms dl>div{padding:16px 0;border-top:1px solid #dcdce2}.learn-terms dt{font-weight:600;font-size:14px}.learn-terms dd{margin:5px 0 0;color:#5e5e64;font-size:13px}.learn-footer{display:flex;gap:22px;flex-wrap:wrap;padding:28px 0 0;margin-top:32px;border-top:1px solid #dcdce2;font-size:12px;color:#5e5e64}.learn-footer>span{margin-right:auto}.learn-footer a{min-height:44px;display:flex;align-items:center}
@media(max-width:1000px){.learn-main{padding-inline:24px}.learn-practice{gap:24px;padding:24px}}
@media(max-width:760px){.learn-main{padding:28px 18px 20px}.learn-page h1{font-size:32px}.learn-page h2{font-size:21px}.learn-intro{margin-bottom:24px}.learn-intro>p:last-child{font-size:15px}.learn-practice{grid-template-columns:1fr;gap:22px;padding:22px;margin-bottom:32px}.learn-practice>ol{gap:8px}.learn-section-heading{display:block}.learn-section-heading>p{margin-top:8px}.learn-lessons summary{gap:13px;min-height:94px;padding-block:20px}.learn-lessons summary b{font-size:15px}.learn-lessons summary small{font-size:12px}.learn-lesson-body{padding:0 0 24px 28px}.learn-actions{align-items:stretch;flex-direction:column;gap:8px}.learn-actions>a{justify-content:flex-start;white-space:normal}.learn-terms dl{grid-template-columns:1fr}.learn-footer{gap:8px 20px}.learn-footer>span{width:100%;margin:0}.learn-lessons>details{scroll-margin-top:132px}.learn-skip:focus{left:16px}.learn-topbar{gap:12px}}
@media(prefers-reduced-motion:reduce){.learn-page *{animation:none!important;transition:none!important;scroll-behavior:auto!important}.learn-button:active,.learn-lessons details[open] .learn-plus{transform:none}}