@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:400;src:url(./inter-latin-400-normal-C38fXH4l.woff2) format("woff2"),url(./inter-latin-400-normal-CyCys3Eg.woff) format("woff")}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:500;src:url(./inter-latin-500-normal-Cerq10X2.woff2) format("woff2"),url(./inter-latin-500-normal-BL9OpVg8.woff) format("woff")}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:600;src:url(./inter-latin-600-normal-LgqL8muc.woff2) format("woff2"),url(./inter-latin-600-normal-CiBQ2DWP.woff) format("woff")}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:700;src:url(./inter-latin-700-normal-Yt3aPRUw.woff2) format("woff2"),url(./inter-latin-700-normal-BLAVimhd.woff) format("woff")}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:400;src:url(./source-serif-4-latin-400-normal-DJ5YJwmz.woff2) format("woff2"),url(./source-serif-4-latin-400-normal-Dn3IlU-Z.woff) format("woff")}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:600;src:url(./source-serif-4-latin-600-normal-DouSKlru.woff2) format("woff2"),url(./source-serif-4-latin-600-normal-DMD1h6_f.woff) format("woff")}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:700;src:url(./source-serif-4-latin-700-normal-CGGdTIBe.woff2) format("woff2"),url(./source-serif-4-latin-700-normal-3V4Pv1hj.woff) format("woff")}:root{font-family:Inter,ui-sans-serif,system-ui,sans-serif;color:#132139;background:var(--page);--accent: #075fc7;--accent-strong: #0755b1;--accent-soft: #edf5ff;--ink: #102039;--muted: #607087;--border: #dce2ea;--surface: #ffffff;--page: #fcfbf7;--sidebar: #f8fafc;--callout: #eef6ff;--focus-shade: rgba(247, 249, 252, .72);--article-size: 18px;--article-leading: 1.72;--sidebar-width: 400px;--header-height: 80px}:root[data-theme=white]{--page: #ffffff;--sidebar: #fafbfc;--focus-shade: rgba(255, 255, 255, .72)}:root[data-theme=blue]{--page: #f3f8fd;--sidebar: #eef5fb;--surface: #f9fcff;--callout: #e4f1ff;--focus-shade: rgba(229, 240, 250, .74)}:root[data-theme=dark]{color-scheme:dark;--ink: #edf3fb;--muted: #aab8ca;--border: #334258;--surface: #182235;--page: #111a2a;--sidebar: #151f31;--callout: #1d3048;--accent: #61a8ff;--accent-strong: #8bc0ff;--accent-soft: #1d3553;--focus-shade: rgba(10, 16, 27, .72)}*{box-sizing:border-box}html{max-width:100%;overflow-x:hidden;background:var(--page);scroll-behavior:smooth}body{margin:0;max-width:100%;min-width:320px;min-height:100vh;overflow-x:hidden;background:var(--page);color:var(--ink);-webkit-font-smoothing:antialiased}button,input,textarea{font:inherit}button{color:inherit}button:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 34%,transparent);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.reader-shell{max-width:100%;min-height:100vh;overflow-x:hidden;background:var(--page)}.reader-shell.font-small{--article-size: 16px}.reader-shell.font-medium{--article-size: 18px}.reader-shell.font-large{--article-size: 21px}.reader-shell.spacing-compact{--article-leading: 1.5}.reader-shell.spacing-comfortable{--article-leading: 1.72}.reader-shell.spacing-spacious{--article-leading: 2}.reader-shell.sidebar-is-collapsed{--sidebar-width: 58px}.topbar{position:fixed;inset:0 0 auto 0;z-index:40;height:var(--header-height);display:grid;grid-template-columns:420px minmax(180px,1fr) auto;align-items:center;gap:28px;padding:0 28px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--surface) 96%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.brand{display:inline-flex;align-items:center;gap:14px;padding:0;border:0;background:transparent;color:var(--accent-strong);text-align:left;cursor:pointer}.brand span{display:grid;gap:2px}.brand strong{font:700 20px/1.15 Inter,sans-serif}.brand small{color:var(--ink);font-size:12px}.progress-wrap{display:grid;gap:7px;width:min(100%,400px);justify-self:center}.progress-wrap>span{font:500 11px/1 Inter,sans-serif}.progress-track{height:5px;overflow:hidden;background:var(--border);border-radius:99px}.progress-track i{display:block;height:100%;border-radius:inherit;background:var(--accent);transition:width .24s ease}.top-actions{display:flex;align-items:center;gap:12px}.top-search{position:relative}.search-box{display:flex;width:300px;height:44px;align-items:center;gap:10px;padding:0 12px;border:1px solid var(--border);border-radius:6px;background:var(--surface);color:var(--muted)}.search-box input{width:100%;border:0;outline:0;background:transparent;color:var(--ink);font-family:"Source Serif 4",Georgia,serif;font-size:15px}.search-box input::placeholder{color:var(--muted)}.search-box kbd{border:0;padding:2px 4px;color:var(--muted);font:500 11px Inter,sans-serif;white-space:nowrap}.search-box--compact{width:100%;height:42px}.search-box--compact input{font-family:Inter,sans-serif;font-size:14px}.search-results{position:absolute;top:calc(100% + 8px);right:0;z-index:70;width:min(520px,calc(100vw - 32px));max-height:520px;overflow:auto;padding:8px;border:1px solid var(--border);border-radius:8px;background:var(--surface);box-shadow:0 18px 55px #0f20372b}.search-results button{width:100%;display:flex;gap:12px;padding:12px;border:0;border-radius:5px;background:transparent;text-align:left;cursor:pointer}.search-results button:hover{background:var(--accent-soft)}.search-results button>span{display:grid;gap:4px;min-width:0}.search-results strong{font-size:14px}.search-results small{overflow:hidden;color:var(--muted);font:400 12px/1.4 Inter,sans-serif;white-space:nowrap;text-overflow:ellipsis}.search-results p{margin:18px;color:var(--muted)}.icon-button{display:inline-grid;width:36px;height:36px;place-items:center;border:0;border-radius:5px;background:transparent;cursor:pointer}.icon-button:hover{background:var(--accent-soft);color:var(--accent)}.icon-button.is-bookmarked{color:var(--accent);background:var(--accent-soft)}.sidebar{position:fixed;inset:var(--header-height) auto 0 0;z-index:25;width:var(--sidebar-width);overflow:hidden;border-right:1px solid var(--border);background:var(--sidebar);transition:width .18s ease,transform .18s ease}.sidebar--collapsed{display:flex;justify-content:center;padding-top:18px}.sidebar-search-row{display:flex;align-items:center;gap:7px;padding:18px 14px 14px 20px}.contents-list{height:calc(100% - 75px);overflow-y:auto;padding-bottom:36px;scrollbar-width:thin}.contents-utility,.chapter-nav__heading,.chapter-nav__lessons button{width:100%;border:0;background:transparent;text-align:left;cursor:pointer}.contents-utility{display:flex;align-items:center;gap:12px;padding:12px 26px;font:500 15px/1.35 "Source Serif 4",Georgia,serif}.contents-utility:hover,.contents-utility.is-active{color:var(--accent);background:var(--accent-soft)}.chapter-nav{position:relative;border-top:1px solid var(--border)}.chapter-nav.is-active:before{content:"";position:absolute;inset:0 auto 0 0;width:3px;background:var(--accent)}.chapter-nav__heading{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;padding:15px 24px 15px 27px;font:600 15px/1.45 "Source Serif 4",Georgia,serif}.chapter-nav__heading:hover{color:var(--accent)}.chapter-nav__lessons{padding:0 0 10px}.chapter-nav__lessons button{display:flex;align-items:flex-start;gap:12px;padding:10px 24px 10px 36px;color:var(--muted);font:400 14px/1.4 "Source Serif 4",Georgia,serif}.chapter-nav__lessons button:hover{color:var(--accent);background:color-mix(in srgb,var(--accent-soft) 55%,transparent)}.chapter-nav__lessons button.is-current{color:var(--accent-strong);background:var(--accent-soft)}.lesson-dot{flex:0 0 7px;height:7px;margin-top:6px;border:1px solid currentColor;border-radius:50%}.is-current .lesson-dot{border-color:var(--accent);background:var(--accent)}.reading-pane{min-height:100vh;margin-left:var(--sidebar-width);padding:calc(var(--header-height) + 34px) 48px 60px;transition:margin-left .18s ease}.article-wrap{width:min(100%,984px);margin-inline:auto}.breadcrumbs{display:flex;align-items:center;gap:8px;min-height:22px;color:var(--muted);font:400 13px/1.4 Inter,sans-serif}.breadcrumbs button{border:0;padding:0;background:transparent;color:var(--accent-strong);cursor:pointer}.lesson-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-top:24px}.lesson-head h1{min-width:0;margin:0;overflow-wrap:anywhere;font:700 clamp(34px,4vw,47px)/1.08 "Source Serif 4",Georgia,serif;letter-spacing:-.025em}.lesson-actions{display:flex;justify-content:flex-end;gap:12px;margin:18px 0 38px}.lesson-actions button,.lesson-footer button{display:inline-flex;align-items:center;gap:8px;min-height:42px;padding:0 18px;border:1px solid var(--border);border-radius:5px;background:var(--surface);color:var(--ink);cursor:pointer}.lesson-actions button.primary{border-color:var(--accent);background:var(--accent);color:#fff}.lesson-actions button:disabled,.lesson-footer button:disabled{opacity:.4;cursor:not-allowed}.article-body{min-width:0;overflow-wrap:anywhere;color:var(--ink);font:400 var(--article-size)/var(--article-leading) "Source Serif 4",Georgia,serif}.article-body>.section>h2:first-child{margin-top:0}.article-body h1,.article-body h2,.article-body h3,.article-body h4{color:var(--ink)}.article-body h2{margin:1.65em 0 .65em;font:700 1.65em/1.18 "Source Serif 4",Georgia,serif;letter-spacing:-.018em}.article-body h3{margin:1.45em 0 .6em;font:700 1.08em/1.25 Inter,sans-serif}.article-body p{max-width:66ch;margin:0 0 1.35em}.article-body ol,.article-body ul{max-width:65ch;padding-left:1.45em}.article-body li{margin:.35em 0;padding-left:.25em}.article-body a{color:var(--accent-strong);text-decoration-thickness:1px;text-underline-offset:3px;cursor:pointer}.article-body .learning_objectives{max-width:100%;margin:1.3em 0 1.75em;padding:25px 28px 24px 70px;border-left:3px solid var(--accent);background:var(--callout);position:relative}.article-body .learning_objectives:before{content:"◎";position:absolute;top:24px;left:28px;color:var(--accent);font:700 27px/1 Inter,sans-serif}.article-body .learning_objectives h3{margin:0 0 15px;color:var(--accent-strong);font-size:16px;letter-spacing:.08em;text-transform:uppercase}.article-body .learning_objectives ol{margin:0}.article-body .callout,.article-body .exercises,.article-body .key_takeaways,.article-body .collaboration{max-width:66ch;margin:1.7em 0;padding:20px 24px;border:1px solid var(--border);border-left:3px solid var(--accent);background:color-mix(in srgb,var(--callout) 62%,var(--page))}.article-body .callout>:last-child,.article-body .exercises>:last-child{margin-bottom:0}.article-body .margin_term{position:relative;border-bottom:1px dotted var(--accent)}.article-body .glossdef{display:none;position:absolute;z-index:15;top:calc(100% + 8px);left:0;width:280px;padding:12px 14px;border:1px solid var(--border);border-radius:5px;background:var(--surface);color:var(--ink);box-shadow:0 12px 30px #0f233c26;font:400 14px/1.45 Inter,sans-serif}.article-body .margin_term:hover .glossdef,.article-body .margin_term:focus-within .glossdef{display:block}.article-body table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:1.5em 0;font-family:Inter,sans-serif;font-size:.82em}.article-body th,.article-body td{padding:10px 12px;border:1px solid var(--border);text-align:left;vertical-align:top}.article-body th{background:var(--accent-soft)}.article-body .informalfigure,.article-body .figure,.article-body .mediaobject{max-width:100%;margin:1.8em 0}.article-body img{display:block;max-width:min(100%,860px);height:auto;margin:0;border:1px solid color-mix(in srgb,var(--border) 80%,transparent);border-radius:4px;background:#fff;box-shadow:0 8px 26px #14263e14;cursor:zoom-in;image-rendering:auto}.article-body img:hover{border-color:var(--accent);box-shadow:0 10px 34px #14468229}.practice-lab{scroll-margin-top:calc(var(--header-height) + 26px);margin-top:64px;padding-top:22px;border-top:1px solid var(--border);font-family:Inter,sans-serif}.practice-heading{display:grid;grid-template-columns:minmax(220px,1fr) minmax(180px,260px) auto;align-items:center;gap:28px;margin-bottom:18px}.practice-title-row{display:flex;align-items:center;gap:13px;min-width:0}.practice-title-icon{display:grid;flex:0 0 38px;height:38px;place-items:center;border:1px solid var(--accent);border-radius:50%;color:var(--accent)}.practice-title-row h2{margin:0;font:700 28px/1.1 "Source Serif 4",Georgia,serif}.practice-title-row p{margin:4px 0 0;color:var(--muted);font-size:11px}.practice-progress{display:grid;gap:7px}.practice-progress>span{font:500 12px/1 Inter,sans-serif}.practice-level{display:flex;align-items:center;justify-content:flex-end;gap:8px;color:var(--accent-strong);font-size:13px;white-space:nowrap}.practice-list{display:grid;gap:12px}.practice-task{display:grid;grid-template-columns:30px minmax(0,1fr);gap:13px;padding:18px 18px 17px 14px;border:1px solid var(--border);border-radius:6px;background:var(--surface);transition:border-color .16s ease,background .16s ease}.practice-task.is-complete{border-color:color-mix(in srgb,#178457 42%,var(--border));background:color-mix(in srgb,#eaf8f1 34%,var(--surface))}.task-number{display:grid;width:28px;height:28px;place-items:center;border-radius:50%;background:var(--accent);color:#fff;font:600 12px/1 Inter,sans-serif}.practice-task.is-complete .task-number{background:#178457}.task-content{min-width:0}.task-eyebrow{display:block;margin-bottom:5px;color:var(--accent-strong);font:600 10px/1.2 Inter,sans-serif;letter-spacing:.075em;text-transform:uppercase}.task-content h3{margin:0;overflow-wrap:anywhere;font:600 17px/1.45 "Source Serif 4",Georgia,serif}.task-content>p{margin:5px 0 14px;color:var(--muted);font-size:12px;line-height:1.45}.task-content textarea{display:block;width:100%;min-height:84px;resize:vertical;padding:12px 13px;border:1px solid var(--border);border-radius:5px;outline:0;background:var(--page);color:var(--ink);font:400 15px/1.5 "Source Serif 4",Georgia,serif}.task-content textarea:focus{border-color:var(--accent)}.task-content textarea::placeholder{color:var(--muted)}.task-actions{display:flex;justify-content:space-between;gap:12px;margin-top:12px}.task-actions button{display:inline-flex;min-height:38px;align-items:center;justify-content:center;gap:7px;padding:0 14px;border:1px solid var(--accent);border-radius:5px;background:var(--surface);color:var(--accent-strong);font-size:12px;font-weight:600;cursor:pointer}.task-actions .practice-save{background:var(--accent);color:#fff}.task-actions .practice-complete.is-complete{border-color:#178457;color:#178457}.practice-status{display:flex;justify-content:space-between;gap:16px;min-height:34px;align-items:center;padding:6px 2px 0;color:#178457;font:500 11px/1.4 Inter,sans-serif}.practice-status span:last-child{color:var(--muted)}.achievements{display:grid;grid-template-columns:minmax(150px,1fr) 1fr 1fr;align-items:center;gap:20px;margin-top:14px;padding:17px 18px;border:1px solid var(--border);border-radius:6px;background:var(--surface)}.achievements h3{margin:0;font:700 18px/1.2 "Source Serif 4",Georgia,serif}.achievement{display:flex;align-items:center;gap:12px;color:var(--muted)}.achievement+.achievement{padding-left:20px;border-left:1px solid var(--border)}.achievement-icon{display:grid;flex:0 0 42px;height:42px;place-items:center;border:1px solid var(--border);border-radius:50%}.achievement>span:last-child{display:grid;gap:2px}.achievement strong{color:var(--ink);font:600 12px/1.2 Inter,sans-serif}.achievement small{font-size:11px}.achievement.is-earned{color:var(--accent)}.achievement.is-earned .achievement-icon{border-color:var(--accent)}.achievement.is-earned small{color:#178457}.lesson-footer{display:flex;justify-content:space-between;gap:18px;margin-top:52px;padding-top:24px;border-top:1px solid var(--border)}.lesson-footer button:last-child{margin-left:auto}.license-note{margin:38px 0 0;color:var(--muted);font-size:11px;text-align:center}.loading-state{display:grid;gap:16px;margin-top:60px}.loading-state span{height:18px;border-radius:4px;background:var(--border);animation:pulse 1.2s infinite alternate}.loading-state span:nth-child(2){width:82%}.loading-state span:nth-child(3){width:68%}@keyframes pulse{to{opacity:.38}}.reading-tools-wrap{position:relative}.reading-tools-button{display:inline-flex;height:44px;align-items:center;gap:9px;padding:0 14px;border:1px solid var(--border);border-radius:5px;background:var(--surface);cursor:pointer}.reading-tools-button:hover,.reading-tools-button.is-open{border-color:var(--accent);color:var(--accent-strong)}.reading-tools-panel{position:absolute;top:calc(100% + 10px);right:0;z-index:80;width:320px;padding:16px;border:1px solid var(--border);border-radius:7px;background:var(--surface);box-shadow:0 18px 55px #0f20372e}.tools-title-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.tools-title-row h2{margin:0;font:700 19px/1.2 "Source Serif 4",Georgia,serif}.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0 16px;border-bottom:1px solid var(--border);cursor:pointer}.toggle-row>span:first-child{display:flex;align-items:center;gap:8px;font-size:14px}.toggle-row input{position:absolute;opacity:0}.switch{width:42px;height:24px;padding:3px;border-radius:20px;background:var(--border);transition:background .15s ease}.switch:before{content:"";display:block;width:18px;height:18px;border-radius:50%;background:#fff;box-shadow:0 1px 4px #00000038;transition:transform .15s ease}.toggle-row input:checked+.switch{background:var(--accent)}.toggle-row input:checked+.switch:before{transform:translate(18px)}.tool-group{margin:16px 0 0;padding:0;border:0}.tool-group legend{margin-bottom:8px;font:600 12px/1 Inter,sans-serif}.segmented{display:flex}.segmented button{flex:1;min-height:38px;padding:0 7px;border:1px solid var(--border);background:var(--surface);font:500 12px/1 Inter,sans-serif;cursor:pointer}.segmented button:first-child{border-radius:5px 0 0 5px}.segmented button:last-child{border-radius:0 5px 5px 0}.segmented button+button{border-left:0}.segmented button.is-selected{background:var(--accent-soft);color:var(--accent-strong)}.theme-options{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.theme-options button{display:grid;gap:6px;justify-items:center;padding:0;border:0;background:transparent;cursor:pointer}.theme-swatch{display:block;width:48px;height:42px;border:1px solid var(--border);border-radius:5px}.theme-options .is-selected .theme-swatch{outline:2px solid var(--accent);outline-offset:2px}.theme-swatch--paper{background:#fcfbf7}.theme-swatch--white{background:#fff}.theme-swatch--blue{background:#edf5fc}.theme-swatch--dark{background:#172235}.theme-options small{color:var(--muted);font-size:10px}.reset-tools{margin-top:18px;padding:0;border:0;background:transparent;color:var(--accent-strong);font-size:12px;cursor:pointer}.focus-layer{position:relative;z-index:11;pointer-events:none}.focus-shade{position:fixed;left:var(--sidebar-width);right:0;background:var(--focus-shade);-webkit-backdrop-filter:saturate(.72);backdrop-filter:saturate(.72)}.focus-shade--top{top:var(--header-height)}.focus-shade--bottom{bottom:0}.focus-band{position:fixed;left:var(--sidebar-width);right:0;height:54px;border-top:1px solid color-mix(in srgb,var(--accent) 18%,transparent);border-bottom:1px solid color-mix(in srgb,var(--accent) 18%,transparent)}.image-viewer{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;display:grid;grid-template-rows:64px 1fr;background:#060c17f5;color:#fff}.image-viewer__toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 22px;border-bottom:1px solid rgba(255,255,255,.18)}.image-viewer__toolbar>span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.image-viewer__toolbar>div{display:flex;align-items:center;gap:6px}.image-viewer__toolbar button{min-width:48px;height:34px;border:1px solid rgba(255,255,255,.22);border-radius:4px;background:transparent;color:#fff;cursor:pointer}.image-viewer__toolbar button.is-selected{background:#fff;color:#0b1728}.image-viewer__canvas{overflow:auto;padding:34px;text-align:center;overscroll-behavior:contain}.image-viewer__canvas img{display:block;max-width:none;height:auto;margin:auto;background:#fff;box-shadow:0 20px 70px #00000073}.mobile-only,.mobile-scrim{display:none}@media(max-width:1180px){.topbar{grid-template-columns:330px 1fr auto;gap:16px;padding:0 20px}.brand strong{font-size:17px}.search-box{width:230px}.reading-tools-button span{display:none}.progress-wrap{width:200px}.lesson-actions{margin:16px 0 30px}}@media(max-width:820px){:root{--header-height: 66px;--sidebar-width: 0px}.desktop-only{display:none!important}.mobile-only{display:inline-grid}.topbar{grid-template-columns:auto 1fr auto;gap:10px;padding:0 12px}.mobile-menu{display:inline-grid;place-items:center;width:38px;height:38px;padding:0;border:0;background:transparent}.brand svg{width:30px}.brand strong{font-size:14px}.brand small,.progress-wrap,.top-search{display:none}.reading-tools-button{width:40px;padding:0;justify-content:center}.reading-tools-panel{position:fixed;top:72px;right:10px;width:min(320px,calc(100vw - 20px))}.sidebar{width:min(88vw,360px);transform:translate(-102%);box-shadow:20px 0 50px #0a192d33}.sidebar.sidebar--mobile-open{transform:translate(0)}.sidebar--collapsed{display:none}.mobile-scrim{display:block;position:fixed;inset:var(--header-height) 0 0 0;z-index:24;border:0;background:#09121f7a}.reading-pane{margin-left:0;padding:calc(var(--header-height) + 22px) 20px 42px}.breadcrumbs{align-items:flex-start;font-size:11px}.lesson-head{margin-top:18px}.lesson-head h1{font-size:clamp(30px,9vw,40px)}.lesson-actions{justify-content:space-between;margin:22px 0 26px}.lesson-actions button{padding:0 13px}.article-body .learning_objectives{padding:20px 18px 20px 50px}.article-body .learning_objectives:before{left:18px;top:21px;font-size:22px}.article-body .learning_objectives h3{font-size:13px}.practice-lab{margin-top:46px}.practice-heading{grid-template-columns:1fr auto;gap:16px}.practice-progress{grid-column:1 / -1;grid-row:2}.practice-level{grid-column:2;grid-row:1}.practice-task{grid-template-columns:26px minmax(0,1fr);gap:10px;padding:15px 13px 14px 11px}.task-number{width:25px;height:25px}.task-content h3{font-size:16px}.task-actions{flex-direction:column}.task-actions button{width:100%}.practice-status{align-items:flex-start;flex-direction:column;gap:2px}.achievements{grid-template-columns:1fr;gap:14px}.achievement+.achievement{padding:14px 0 0;border-top:1px solid var(--border);border-left:0}.lesson-footer{flex-direction:column}.lesson-footer button{width:100%;justify-content:center}.focus-shade,.focus-band{left:0}.image-viewer__toolbar{padding:0 10px}.image-viewer__toolbar>span{display:none}.image-viewer__toolbar>div{width:100%;justify-content:flex-end}.image-viewer__canvas{padding:20px}}@media print{.topbar,.sidebar,.lesson-actions,.lesson-footer,.reading-tools-panel,.focus-layer,.practice-lab{display:none!important}.reading-pane{margin:0;padding:0}.article-body{font-size:11pt}.article-body a{color:#000}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}