:root{--web-content-width:78rem;--web-gutter:clamp(1rem,4vw,4rem);--web-surface:var(--lexync-color-surface);--web-subtle:var(--lexync-color-surface-subtle);--web-strong:var(--lexync-color-surface-strong);--web-ink:var(--lexync-color-ink);--web-muted:var(--lexync-color-ink-muted);--web-line:var(--lexync-color-border);--web-line-strong:var(--lexync-color-border-strong);--web-primary:var(--lexync-color-brand-primary);--web-primary-hover:var(--lexync-color-brand-primary-hover);--web-primary-active:var(--lexync-color-brand-primary-active);--lexync-type-family-display:var(--web-font),"Segoe UI",system-ui,sans-serif;--lexync-type-family-body:var(--web-font),"Segoe UI",system-ui,sans-serif;--lexync-type-family-material:var(--web-font),"Noto Sans","Noto Sans JP","Noto Naskh Arabic","Noto Sans Devanagari","Segoe UI",system-ui,sans-serif;--web-quiet:var(--lexync-color-border-quiet);--web-dim:var(--lexync-color-surface-muted);--web-outline:var(--lexync-border-regular) solid var(--lexync-color-border-strong);--web-outline-quiet:var(--lexync-border-regular) solid var(--lexync-color-border);--web-lift:var(--lexync-elevation-medium);--web-lift-low:var(--lexync-elevation-low);--web-press:none;--web-state:var(--lexync-motion-duration-fast) var(--lexync-motion-easing-standard);--web-ground-base:var(--lexync-color-ground);--web-ground:var(--lexync-gradient-ground);--web-ground-density:1;--web-selected:var(--lexync-color-surface-selected);--web-skeleton:var(--lexync-color-surface-skeleton);--web-mark:var(--lexync-color-mark);--web-panel-head:var(--lexync-color-surface-strong);--web-shell-max:96rem;--web-measure:64rem;--web-edge:var(--lexync-elevation-edge);--web-brand-deep:var(--lexync-color-brand-deep);--web-brand-soft:var(--lexync-color-brand-soft);--web-brand-sweep:var(--lexync-gradient-brand-sweep);--web-glass:var(--lexync-glass-fill);--web-glass-strong:var(--lexync-glass-fill-strong);--web-glass-quiet:var(--lexync-glass-fill-quiet);--web-glass-border:var(--lexync-glass-border);--web-glass-blur:var(--lexync-glass-blur);--web-glass-highlight:var(--lexync-glass-highlight);--web-control-radius:var(--lexync-radius-pill);--web-lift-high:var(--lexync-elevation-high);--web-chevron:url("data:image/svg+xml,%3Csvg 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var(--lexync-focus-color);outline-offset:var(--lexync-focus-offset);box-shadow:var(--lexync-focus-ring)}.hero,.learning-loop,.privacy-layout,.site-header,.surfaces,footer{padding-left:var(--web-gutter);padding-right:var(--web-gutter)}.site-header{position:relative;z-index:var(--lexync-z-sticky);min-height:4.75rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;border-bottom:var(--lexync-border-hairline) solid var(--web-glass-border);background:var(--web-glass);-webkit-backdrop-filter:var(--web-glass-blur);backdrop-filter:var(--web-glass-blur);box-shadow:var(--lexync-elevation-edge),var(--web-glass-highlight)}.auth-brand,.brand{display:inline-flex;align-items:center;flex:0 0 auto;text-decoration:none}.brand-artwork,.brand-artwork img{display:block}.brand-artwork img{width:8.5rem;height:auto}.footer-meta,.site-header-actions{display:flex;align-items:center;flex-wrap:wrap;gap:1rem}.site-header-actions{font-size:var(--lexync-type-size-sm);font-weight:var(--lexync-type-weight-bold)}.footer-meta a,.site-header-actions a{text-decoration:none}.header-action-primary{display:inline-flex;min-height:2.75rem;align-items:center;justify-content:center;padding:.7rem 1rem;border:var(--web-outline);border-radius:var(--web-control-radius);background:var(--web-primary);color:var(--lexync-color-white);font-size:var(--lexync-type-size-sm);font-weight:var(--lexync-type-weight-bold);text-decoration:none;box-shadow:var(--web-lift);transition:background var(--web-state),box-shadow var(--web-state),transform var(--web-state)}.header-action-primary:hover{background:var(--web-primary-hover)}.header-action-primary:active,.primary-button:active,.secondary-button:active{box-shadow:var(--lexync-elevation-quiet);filter:brightness(.96)}.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(min(100%,20rem),.9fr);align-items:center;gap:clamp(2rem,6vw,4.5rem);max-width:82rem;margin:0 auto;padding-top:clamp(3rem,6vw,5.5rem);padding-bottom:clamp(3rem,6vw,5.5rem)}.hero-copy{max-width:39rem}h1,h2{color:var(--web-ink);font-family:var(--lexync-type-family-display);font-weight:var(--lexync-type-weight-bold);letter-spacing:var(--lexync-type-tracking-tight)}h1{max-width:30ch;font-size:clamp(2.25rem,5vw,3.5rem);line-height:1.05}.hero-intro{max-width:36rem;margin:1.75rem 0 2rem;color:var(--web-muted);font-size:var(--lexync-type-size-lg);line-height:var(--lexync-type-line-relaxed)}.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:1rem}.text-link{display:inline-flex;align-items:center;min-height:2.75rem;color:var(--web-ink);font-size:var(--lexync-type-size-sm);font-weight:var(--lexync-type-weight-bold);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:.28em}.learning-loop{padding-top:clamp(3.5rem,7vw,6rem);padding-bottom:clamp(3.5rem,7vw,6rem);border-top:var(--lexync-border-hairline) solid var(--web-glass-border);background:var(--web-glass-quiet)}.section-heading{max-width:var(--web-content-width);margin:0 auto;padding-bottom:2.5rem}.section-heading h2,.surfaces-heading h2{max-width:28ch;margin-bottom:1rem;font-size:clamp(1.75rem,4vw,2.75rem);line-height:1.1}.section-heading>p:last-child{max-width:36rem;margin-bottom:0;color:var(--web-muted);line-height:var(--lexync-type-line-relaxed)}.principle-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.9fr) minmax(0,1.15fr);align-items:start;max-width:var(--web-content-width);margin:0 auto;column-gap:clamp(1rem,3vw,3rem)}.principle-grid:before{position:absolute;top:2.2rem;right:8%;left:8%;border-top:var(--lexync-border-regular) solid var(--web-line-strong);content:""}.principle-grid article{position:relative;padding:3.5rem 0 0}.principle-grid article:before{position:absolute;top:1.7rem;left:0;width:1rem;height:1rem;border:var(--lexync-border-regular) solid var(--web-line-strong);background:var(--web-primary);content:""}.principle-grid{grid-template-columns:repeat(3,minmax(0,1fr));column-gap:clamp(1.5rem,4vw,3.5rem)}.principle-grid h3,.surface-list h3{margin-bottom:.75rem;color:var(--web-ink);font-family:var(--lexync-type-family-display);font-size:var(--lexync-type-size-xl);font-weight:var(--lexync-type-weight-bold);letter-spacing:var(--lexync-type-tracking-tight)}.principle-grid article>p:last-child,.surface-list article>div>p:last-child{max-width:34rem;margin-bottom:0;color:var(--web-muted);font-size:var(--lexync-type-size-sm);line-height:var(--lexync-type-line-relaxed)}.surfaces{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(2rem,6vw,5rem);max-width:100rem;margin:0 auto;padding-top:clamp(3.5rem,7vw,6rem);padding-bottom:3rem}.surfaces-heading{position:sticky;top:2rem;align-self:start}.surface-list article{padding:0 0 2rem;margin-bottom:2rem;border-bottom:var(--lexync-border-regular) solid var(--web-quiet)}.surface-list h3{font-size:var(--lexync-type-size-2xl)}.web-boundary{grid-column:2;margin:0 0 1rem;color:var(--web-muted);font-size:var(--lexync-type-size-sm);line-height:var(--lexync-type-line-relaxed)}footer{min-height:8rem;display:flex;align-items:center;justify-content:space-between;gap:1.5rem;border-top:var(--lexync-border-hairline) solid var(--web-glass-border);background:var(--web-glass-quiet)}.footer-meta{color:var(--web-ink)}.footer-meta a{font-weight:var(--lexync-type-weight-bold)}.footer-meta a,footer p{font-size:var(--lexync-type-size-sm)}footer p{margin:0;color:var(--web-muted)}.privacy-page{background:var(--web-surface)}.privacy-layout{display:grid;grid-template-columns:minmax(11rem,15rem) minmax(0,48rem);justify-content:center;gap:clamp(2rem,8vw,7rem);max-width:var(--web-content-width);margin:0 auto;padding-top:clamp(3rem,7vw,7rem);padding-bottom:clamp(5rem,10vw,9rem)}.privacy-summary{align-self:start;position:sticky;top:2rem;padding:1.25rem;border:var(--web-outline);border-radius:var(--lexync-radius-lg);background:var(--web-subtle);box-shadow:var(--web-lift)}.privacy-summary p{margin:0 0 1.5rem;color:var(--web-muted);font-size:var(--lexync-type-size-sm);line-height:var(--lexync-type-line-relaxed)}.privacy-summary strong{display:block;margin-bottom:.6rem;color:var(--web-ink);font-family:var(--lexync-type-family-display);font-size:var(--lexync-type-size-lg);font-weight:var(--lexync-type-weight-bold)}.privacy-policy>header{padding-bottom:clamp(2.5rem,6vw,5rem);border-bottom:var(--web-outline)}.privacy-policy h1{max-width:24ch;font-size:clamp(2.25rem,5vw,3.5rem);line-height:1.05}.privacy-policy>header>p:last-child{max-width:42rem;margin:1.75rem 0 0;color:var(--web-muted);font-size:var(--lexync-type-size-lg);line-height:var(--lexync-type-line-relaxed)}.privacy-policy section{padding:clamp(2.25rem,6vw,4rem) 0;border-bottom:var(--lexync-border-regular) solid var(--web-quiet)}.privacy-policy section:last-child{border-bottom:0}.privacy-policy h2{margin-bottom:1.5rem;font-size:var(--lexync-type-size-2xl);line-height:1.1}.privacy-policy h3{margin:2rem 0 .65rem;color:var(--web-ink);font-size:var(--lexync-type-size-md)}.privacy-policy li,.privacy-policy p{max-width:70ch;color:var(--web-muted);line-height:var(--lexync-type-line-relaxed);text-wrap:pretty}.privacy-policy p{margin-bottom:1rem}.privacy-policy ul{display:grid;gap:.45rem;margin:0 0 1.25rem;padding-left:1.25rem}.privacy-policy a{color:var(--web-primary-active);text-decoration-thickness:2px;text-underline-offset:.2em}.privacy-header .text-link{min-height:2rem}.privacy-footer{min-height:7rem}.auth-page{min-height:100dvh;display:grid;grid-template-columns:minmax(16rem,.85fr) 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.auth-brand{margin-bottom:1.75rem}.auth-card h1{max-width:20ch;font-family:var(--lexync-type-family-display);font-size:var(--lexync-type-size-3xl);line-height:1.05}.app-empty,.auth-intro{color:var(--web-muted);line-height:var(--lexync-type-line-relaxed)}.web-auth-form{display:grid;gap:.55rem;margin-top:1.75rem}.web-auth-form .primary-button,.web-auth-form .secondary-button{margin-top:.5rem}.pair-delete-dialog label,.pair-language-form label,.pair-selector-label,.searchable-picker label,.vocabulary-discovery-controls label,.vocabulary-move-panel label,.web-auth-form label{color:var(--web-ink);font-size:var(--lexync-type-size-sm);font-weight:var(--lexync-type-weight-bold);line-height:var(--lexync-type-line-tight)}.app-content select,.pair-delete-dialog input,.pair-language-form input,.searchable-picker input,.vocabulary-discovery-controls input,.vocabulary-discovery-controls select,.vocabulary-editor input,.vocabulary-editor select,.vocabulary-editor textarea,.vocabulary-form 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select,.vocabulary-discovery-controls select,.vocabulary-editor select,.vocabulary-move-panel select,.web-auth-form select{appearance:none;padding-inline-end:2.75rem;background-image:var(--web-chevron);background-position:right .85rem center;background-repeat:no-repeat;background-size:1rem}input:hover,select:hover,textarea:hover{border-color:var(--web-primary)}input:disabled,select:disabled,textarea:disabled{cursor:not-allowed;border-color:var(--web-line);background-color:var(--web-dim);color:var(--web-muted)}.primary-button,.secondary-button{min-height:2.75rem;display:inline-flex;align-items:center;justify-content:center;gap:.4rem;border:var(--web-outline);border-radius:var(--web-control-radius);padding:.7rem 1.15rem;color:var(--lexync-color-white);background:var(--web-primary);font-family:var(--lexync-type-family-body);font-size:var(--lexync-type-size-sm);font-weight:var(--lexync-type-weight-bold);line-height:1.2;text-align:center;text-decoration:none;cursor:pointer;box-shadow:var(--web-lift);transition:background var(--web-state),box-shadow var(--web-state),transform 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var(--web-state)}.app-sidebar-top{display:flex;align-items:center;justify-content:space-between;gap:.5rem;min-height:2.75rem}.app-sidebar .auth-brand{min-width:0}.app-sidebar .brand-artwork img{width:7rem;height:auto}.app-sidebar-mark{width:2.25rem;height:2.25rem}.app-sidebar-toggle{display:grid;width:2rem;height:2rem;flex:0 0 auto;place-items:center;border:var(--lexync-border-hairline) solid var(--web-glass-border);border-radius:var(--lexync-radius-pill);background:var(--web-glass-strong);color:var(--web-muted);cursor:pointer;transition:background var(--web-state),color var(--web-state)}.app-sidebar-toggle:hover{background:var(--web-surface);color:var(--web-ink)}.app-sidebar-bottom{display:grid;gap:.6rem;margin-top:auto}.app-sidebar-bottom .language-switcher,.app-sidebar-bottom .language-switcher-trigger,.app-sidebar-bottom .profile-button{width:100%}.app-sidebar-bottom .language-switcher-menu{right:auto;left:0;bottom:calc(100% + .5rem);top:auto;width:100%;min-width:0}.app-main{display:flex;min-width:0;flex-direction:column}.nav-icon{flex:0 0 auto;width:1.25rem;height:1.25rem}.app-sidebar-toggle .nav-icon{width:1.1rem;height:1.1rem}@media (min-width:56.0625rem){.app-sidebar[data-collapsed=true]{width:5rem;align-items:center;padding-inline:.75rem}.app-sidebar[data-collapsed=true] .app-sidebar-top{display:grid;place-items:center}.app-sidebar[data-collapsed=true] .app-sidebar-top>*{grid-area:1/1}.app-sidebar[data-collapsed=true] .app-sidebar-top .auth-brand{transition:opacity var(--web-state)}.app-sidebar[data-collapsed=true] .app-sidebar-top:focus-within .auth-brand,.app-sidebar[data-collapsed=true] .app-sidebar-top:hover .auth-brand{pointer-events:none}.app-sidebar[data-collapsed=true] .app-sidebar-toggle{position:relative;z-index:1;opacity:0;pointer-events:none;transition:opacity var(--web-state),background var(--web-state)}.app-sidebar[data-collapsed=true] .app-sidebar-top:focus-within .auth-brand,.app-sidebar[data-collapsed=true] .app-sidebar-top:hover .auth-brand{opacity:0}.app-sidebar[data-collapsed=true] .app-sidebar-top:focus-within .app-sidebar-toggle,.app-sidebar[data-collapsed=true] .app-sidebar-top:hover .app-sidebar-toggle{opacity:1;pointer-events:auto}.app-sidebar[data-collapsed=true] .app-sidebar-bottom .language-switcher,.app-sidebar[data-collapsed=true] .app-sidebar-bottom .language-switcher-trigger,.app-sidebar[data-collapsed=true] .app-sidebar-bottom .profile-button{width:auto}.app-sidebar[data-collapsed=true] .app-sidebar-bottom{justify-items:center}.app-sidebar[data-collapsed=true] .app-sidebar-bottom .language-switcher-menu{inset:auto auto 0 calc(100% + .5rem);width:13rem;min-width:0}.app-sidebar[data-collapsed=true] .language-switcher-chevron,.app-sidebar[data-collapsed=true] .language-tag,.app-sidebar[data-collapsed=true] .profile-button-label{display:none}.app-sidebar[data-collapsed=true] .language-switcher-trigger{padding:.35rem .6rem}.app-sidebar[data-collapsed=true] .app-navigation a{justify-content:center;padding-inline:.4rem}.app-sidebar[data-collapsed=true] .app-navigation-label{display:none}}.app-shell h1,.app-shell h2,.app-shell h3,.app-shell h4{font-family:var(--lexync-type-family-display);font-weight:var(--lexync-type-weight-bold);letter-spacing:var(--lexync-type-tracking-tight);line-height:var(--lexync-type-line-tight)}.profile-region{display:flex;align-items:center;gap:.65rem}.profile-button{min-height:2.75rem;display:inline-flex;align-items:center;gap:.55rem;padding:.35rem .85rem .35rem .4rem;border:0;border-radius:var(--lexync-radius-md);background:transparent;color:var(--web-muted);font-size:var(--lexync-type-size-sm);font-weight:var(--lexync-type-weight-bold);text-decoration:none;transition:background var(--web-state),color 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.6rem;border:var(--web-outline);border-radius:var(--web-control-radius);background:var(--web-surface);color:var(--web-ink);font-family:var(--lexync-type-family-body);font-size:var(--lexync-type-size-sm);font-weight:var(--lexync-type-weight-bold);cursor:pointer;box-shadow:var(--lexync-elevation-quiet);transition:background var(--web-state),box-shadow var(--web-state),transform 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