.learning-app{background:var(--color-paper);min-height:100vh;color:var(--color-ink)}.learning-app .focus-ring:focus-visible{outline-offset:3px;outline:3px solid #527896}.learning-app h1,.learning-app h2,.learning-app h3{font-family:var(--font-display);letter-spacing:-.035em}.learning-sidebar{display:none}.learning-main{max-width:1248px;padding:28px 20px calc(108px + env(safe-area-inset-bottom));margin:0 auto}.learning-page-heading{margin-bottom:32px}.learning-page-heading h1{font-size:clamp(1.9rem,4vw,2.4rem);font-weight:650;line-height:1.2}.learning-page-heading p{max-width:650px;color:var(--color-ink-soft);margin-top:9px;font-size:14px;line-height:1.75}.learning-mobile-header{padding:max(12px, env(safe-area-inset-top)) 20px 12px;border-bottom:1px solid var(--color-line);background:#fff;justify-content:space-between;align-items:center;display:flex}.learning-mobile-header>a:last-child{background:var(--color-paper);border-radius:12px;place-items:center;width:44px;height:44px;display:grid}.learning-mobile-nav{z-index:50;padding:8px 12px max(10px, env(safe-area-inset-bottom));border-top:1px solid var(--color-line);backdrop-filter:blur(16px);background:#ffffffed;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;display:grid;position:fixed;bottom:0;left:0;right:0}.learning-mobile-nav a{min-height:56px;color:var(--color-ink-soft);border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:5px;font-size:11px;font-weight:600;display:flex}.learning-mobile-nav a[aria-current]{color:var(--color-teal);background:var(--color-paper-deep)}.learning-back{min-height:44px;color:var(--color-ink-soft);border-radius:6px;align-items:center;gap:8px;margin:-12px 0 12px;font-size:13px;display:inline-flex}.learning-stack{gap:32px;display:grid}.learning-next{border:1px solid var(--color-line);background:#fff;border-radius:24px;grid-template-columns:minmax(0,1fr);display:grid;overflow:hidden}.learning-next-copy{min-width:0;padding:26px}.learning-next h2{letter-spacing:-.015em;font-size:17px;font-weight:600}.learning-next-context{color:var(--color-ink-soft);margin-top:24px;font-size:12px;line-height:1.6}.learning-next h3{margin-top:8px;font-size:clamp(1.6rem,3vw,2.15rem);font-weight:650;line-height:1.2}.learning-next-description{max-width:600px;color:var(--color-ink-soft);margin-top:12px;font-size:14px;line-height:1.8}.learning-button{background:var(--color-teal);color:#fff;border-radius:12px;justify-content:center;align-items:center;gap:12px;min-height:48px;margin-top:24px;padding:12px 20px;font-size:14px;font-weight:650;display:inline-flex}.learning-button:hover{background:var(--color-teal-dark)}.learning-next-aside{display:none}.learning-section-heading{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 20px;margin-bottom:18px;display:flex}.learning-section-heading h2,.learning-panel h2{font-size:21px;font-weight:650}.learning-section-heading p{color:var(--color-ink-soft);font-size:13px}.learning-course-grid{gap:16px;display:grid}.learning-course-card{border:1px solid var(--color-line);background:#fff;border-radius:20px;flex-direction:column;min-width:0;padding:24px;transition:border-color .15s,box-shadow .15s;display:flex}.learning-course-card:hover{border-color:#a4b2bf;box-shadow:0 6px 24px #30305006}.learning-icon{background:var(--color-paper);width:46px;height:46px;color:var(--color-ink-soft);border-radius:14px;flex-shrink:0;place-items:center;display:grid}.learning-course-card h3{margin-top:20px;font-size:23px;font-weight:650;line-height:1.3}.learning-course-card p{color:var(--color-ink-soft);max-width:400px;margin-top:8px;font-size:14px;line-height:1.8}.learning-course-footer{border-top:1px solid var(--color-line);color:var(--color-ink-soft);justify-content:space-between;align-items:center;gap:16px;margin-top:24px;padding-top:18px;font-size:12px;display:flex}.learning-footnote{color:var(--color-ink-soft);font-size:12px;line-height:2}.learning-footnote a,.learning-text-link{color:var(--color-teal-dark);text-underline-offset:4px;border-radius:4px;text-decoration:underline}.learning-loading{min-height:240px;color:var(--color-ink-soft);padding:48px 0}.learning-notice{background:#fff9ed;border:1px solid #e2d3ac;border-radius:12px;padding:16px;font-size:13px;line-height:1.7}.learning-panel{border:1px solid var(--color-line);background:#fff;border-radius:20px;min-width:0;padding:22px}.learning-panel>p{color:var(--color-ink-soft);margin-top:8px;font-size:14px;line-height:1.8}.learning-row{border-top:1px solid var(--color-line);align-items:center;gap:16px;min-height:80px;padding:16px 0;display:flex}.learning-row:first-child{border-top:0}.learning-panel.learning-row{border:1px solid var(--color-line);padding:20px}.learning-row-copy{flex:1;min-width:0}.learning-row-copy strong{font-size:14px;font-weight:650;display:block}.learning-row-copy small{color:var(--color-ink-soft);margin-top:5px;font-size:12px;line-height:1.7;display:block}.learning-row>svg:last-child{color:#8b8c9f;flex-shrink:0}.learning-row:hover .learning-row-copy strong{color:var(--color-teal-dark)}.learning-chapters{gap:12px;display:grid}.learning-chapter{border:1px solid var(--color-line);background:#fff;border-radius:16px;overflow:clip}.learning-chapter summary{cursor:pointer;align-items:center;gap:16px;padding:20px;list-style:none;display:flex}.learning-chapter summary::-webkit-details-marker{display:none}.learning-chapter-number{background:var(--color-paper);width:32px;height:32px;color:var(--color-ink-soft);border-radius:10px;flex-shrink:0;place-items:center;font-size:12px;display:grid}.learning-chapter summary strong{font-size:15px;font-weight:650;line-height:1.5;display:block}.learning-chapter summary small{color:var(--color-ink-soft);margin-top:4px;font-size:12px;display:block}.learning-chapter summary>svg{color:var(--color-ink-soft);flex-shrink:0;margin-left:auto}.learning-chapter[open] summary>svg{transform:rotate(180deg)}.learning-chapter-lessons{border-top:1px solid var(--color-line);padding:0 20px 6px}.learning-lesson-status{width:24px;height:24px;color:var(--color-teal);flex-shrink:0;place-items:center;display:grid}.learning-secondary-grid{gap:16px;display:grid}.learning-tabs{flex-wrap:wrap;gap:8px;display:flex}.learning-tabs button{border:1px solid var(--color-line);background:#fff;border-radius:10px;min-height:44px;padding:10px 16px;font-size:13px}.learning-tabs button[aria-pressed=true]{border-color:var(--color-teal);background:var(--color-teal);color:#fff}.learning-search{margin:20px 0 6px;display:block}.learning-search span{color:var(--color-ink-soft);margin-bottom:8px;font-size:12px;display:block}.learning-search input{border:1px solid var(--color-line);background:var(--color-paper);border-radius:10px;width:100%;min-height:48px;padding:12px 14px;font-size:14px}.learning-panel .learning-stat{color:var(--color-ink);font-size:32px;font-weight:650;line-height:1.3;font-family:var(--font-display);margin-top:22px}.learning-lesson-body{max-width:820px}.learning-lesson-body h2{margin-bottom:14px;font-size:22px;font-weight:650}.learning-lesson-body p,.learning-lesson-body li{color:var(--color-ink-soft);font-size:15px;line-height:1.9}.learning-checks{gap:14px;display:grid}.learning-checks li{align-items:flex-start;gap:12px;display:flex}.learning-checks svg{color:var(--color-teal);flex-shrink:0;margin-top:6px}.learning-identity{border-top:1px solid var(--color-line);align-items:center;gap:10px;margin-top:18px;padding:18px 10px 0;display:flex}.learning-identity>span:last-child{min-width:0}.learning-identity strong{text-overflow:ellipsis;white-space:nowrap;font-size:12px;display:block;overflow:hidden}.learning-identity small{color:var(--color-ink-soft);margin-top:5px;font-size:10px;line-height:1.5;display:block}.learning-avatar{background:var(--color-paper-deep);width:32px;height:32px;color:var(--color-ink-soft);border-radius:50%;flex-shrink:0;place-items:center;font-size:12px;display:grid}@media (width>=640px){.learning-main{padding:40px 32px 112px}.learning-course-grid,.learning-secondary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.learning-next-copy{padding:32px}.learning-panel{padding:28px}}@media (width>=1024px){.learning-app{grid-template-columns:228px minmax(0,1fr);display:grid}.learning-sidebar{border-right:1px solid var(--color-line);background:#fff;flex-direction:column;height:100dvh;padding:32px 18px 20px;display:flex;position:sticky;top:0}.learning-sidebar>a{width:fit-content;margin-left:14px}.learning-desktop-nav{gap:6px;margin-top:48px;display:grid}.learning-desktop-nav a,.learning-account-link{min-height:48px;color:var(--color-ink-soft);border-radius:12px;align-items:center;gap:12px;padding:12px 16px;font-size:14px;font-weight:600;display:flex}.learning-desktop-nav a:hover,.learning-account-link:hover{background:var(--color-paper)}.learning-desktop-nav a[aria-current],.learning-account-link[aria-current]{color:var(--color-teal-dark);background:var(--color-paper-deep)}.learning-sidebar-bottom{margin-top:auto;padding-top:32px}.learning-legal{color:var(--color-ink-soft);flex-wrap:wrap;gap:10px;margin:20px 12px 0;font-size:10px;display:flex}.learning-mobile-header,.learning-mobile-nav{display:none}.learning-main{padding:48px clamp(32px,4vw,64px) 80px}.learning-main-wrap{min-width:0}.learning-next{grid-template-columns:minmax(0,1fr) 180px}.learning-next-aside{border-left:1px solid var(--color-line);color:var(--color-teal);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:24px;margin:28px 28px 28px 0;display:flex}.learning-next-aside span{color:var(--color-ink-soft);font-size:13px;line-height:1.9}}@media (prefers-reduced-motion:reduce){.learning-app *,.learning-app :before,.learning-app :after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}