:root{--space-0:0;--space-0-5:.125rem;--space-1:.25rem;--space-1-5:.375rem;--space-2:.5rem;--space-2-5:.625rem;--space-3:.75rem;--space-3-5:.875rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-7:1.75rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--font-family-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-family-display:var(--font-family-sans);--font-weight-regular:400;--font-weight-medium:500;--font-weight-semibold:600;--font-weight-bold:700;--font-weight-heavy:800;--line-height-tight:1.05;--line-height-snug:1.2;--line-height-normal:1.5;--line-height-relaxed:1.7;--line-height-reading:1.8;--letter-spacing-tight:-.02em;--letter-spacing-normal:0;--letter-spacing-wide:.04em;--letter-spacing-caps:.08em;--font-size-2xs:.66rem;--font-size-xs:.75rem;--font-size-sm:.875rem;--font-size-base:1rem;--font-size-lg:1.125rem;--font-size-xl:1.25rem;--font-size-2xl:1.5rem;--font-size-3xl:2rem;--font-size-4xl:2.5rem;--font-size-fluid-title:clamp(1.75rem, 7vw, 2rem);--font-size-fluid-dialog:clamp(1.5rem, 3vw, 2rem);--radius-none:0;--radius-xs:.25rem;--radius-sm:.5rem;--radius-md:.75rem;--radius-lg:1rem;--radius-pill:999px;--radius-round:50%;--duration-fast:.15s;--duration-base:.2s;--duration-slow:.24s;--duration-skeleton:1.95s;--easing-standard:ease;--easing-emphasized:ease-in-out;--lightningcss-light:initial;--lightningcss-dark: ;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--text-scale:1;--bg-primary:#f8fafc;--sidebar-bg:#fff;--card-bg:#fff;--surface-overlay:#ffffff1a;--mobile-topbar-bg:#fffffff2;--figure-select-bg:#fffffff5;--text-primary:#0f172a;--text-secondary:#64748b;--text-body:#334155;--text-ink-strong:#111;--text-ink-warm:#24160a;--text-ink-preface:#18110a;--text-on-dark:#fff;--accent-color:#9a5b00;--accent-word-family:#9e2f68;--accent-audio-meaning-match:#0b6567;--accent-semantic-nuance:#765b84;--accent-vocabulary:#765b84;--accent-vocabulary-gap:var(--accent-vocabulary);--accent-vocabulary-meaning:#2f6f9f;--accent-vocabulary-usage:#8a3f8d;--accent-link-multi:#6a5a8b;--hover-bg:#fef3c7;--border-color:#e2e8f0;--border-sidebar:#d6d6d6;--border-section:#e5e7eb;--divider-strong:#0f172a80;--focus-dark-subtle:#0f172a59;--tooltip-bg:#1a222df7;--tooltip-bg-soft:#1a222df5;--tooltip-shadow:0 16px 38px #0f172a38;--tooltip-shadow-soft:0 12px 30px #0f172a33;--shadow-soft:0 4px 6px #0000000d;--shadow-card:0 4px 6px -1px #0000001a;--shadow-offset:6px 6px 0 #11111114;--shadow-offset-strong:8px 8px 0 #1111111f;--input-focus-ring:0 0 0 2px #f59e0b33;--state-success-border:#22c55e;--state-success-bg:#f0fdf4;--state-success-text:#166534;--state-warning-border:#f59e0b;--state-warning-bg:#fff7e6;--state-warning-text:#b45309;--state-danger-border:#ef4444;--state-danger-bg:#fef2f2;--state-danger-text:#991b1b;--length-hint-border:#94a3b8b3;--example-note-color:#f8d98a;--primary:var(--accent-color);--secondary:var(--text-primary);--glass-border:var(--border-color);--reading-success-surface:color-mix(in srgb, var(--state-success-bg) 92%, white);--reading-danger-surface:color-mix(in srgb, var(--state-danger-bg) 92%, white);--overlay-scrim:#0f172a6b;--overlay-scrim-strong:#0f172a80;--sidebar-mobile-shadow:22px 0 48px #0f172a38;--surface-shadow-lifted-sm:4px 4px 0 #11111114;--surface-shadow-lifted-md:5px 5px 0 #1111111f;--theme-toggle-sun-color:#c97a00;--theme-toggle-moon-color:var(--text-primary)}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--text-scale:1;--bg-primary:#0f172a;--sidebar-bg:#162033;--card-bg:#172235;--surface-overlay:#ffffff14;--mobile-topbar-bg:#0f172ae6;--figure-select-bg:#0f172af0;--text-primary:#d9e2f0;--text-secondary:#94a3b8;--text-body:#c2ccda;--text-ink-strong:#e6eef8;--text-ink-warm:#f6ddb0;--text-ink-preface:#f7e7c1;--text-on-dark:#eef4fb;--accent-color:#fbbf24;--accent-word-family:#f472b6;--accent-audio-meaning-match:#2dd4bf;--accent-semantic-nuance:#c4a7d5;--accent-vocabulary:color-mix(in srgb, var(--accent-color) 35%, var(--accent-word-family));--accent-vocabulary-gap:var(--accent-vocabulary);--accent-vocabulary-meaning:#93c5fd;--accent-vocabulary-usage:#f0abfc;--accent-link-multi:color-mix(in srgb, var(--accent-color) 52%, var(--accent-word-family));--hover-bg:#36260a;--border-color:#334155;--border-sidebar:#253047;--border-section:#334155;--divider-strong:#e2e8f052;--focus-dark-subtle:#94a3b873;--tooltip-bg:#020617f7;--tooltip-bg-soft:#0f172af5;--tooltip-shadow:0 18px 44px #02061780;--tooltip-shadow-soft:0 14px 34px #02061775;--shadow-soft:0 12px 28px #02061747;--shadow-card:0 12px 28px #02061757;--shadow-offset:6px 6px 0 #0206175c;--shadow-offset-strong:8px 8px 0 #0206177a;--input-focus-ring:0 0 0 2px #fbbf243d;--state-success-border:#4ade80;--state-success-bg:#10271a;--state-success-text:#bbf7d0;--state-warning-border:#fbbf24;--state-warning-bg:#3a2a0d;--state-warning-text:#fde68a;--state-danger-border:#f87171;--state-danger-bg:#36161a;--state-danger-text:#fecaca;--length-hint-border:#94a3b88f;--example-note-color:#f3c969;--primary:var(--accent-color);--secondary:var(--text-primary);--glass-border:var(--border-color);--reading-success-surface:color-mix(in srgb, var(--state-success-bg) 82%, var(--card-bg));--reading-danger-surface:color-mix(in srgb, var(--state-danger-bg) 82%, var(--card-bg));--overlay-scrim:#0206179e;--overlay-scrim-strong:#020617b8;--sidebar-mobile-shadow:22px 0 48px #0206176b;--surface-shadow-lifted-sm:4px 4px 0 #02061757;--surface-shadow-lifted-md:5px 5px 0 #02061770;--theme-toggle-sun-color:var(--text-primary);--theme-toggle-moon-color:#dbe7ff}.app-container[data-book-key=biene-maja]{--accent-color:#f59e0b;--accent-word-family:#d95798;--accent-audio-meaning-match:#0f8b8d;--accent-semantic-nuance:#8f6f9f;--accent-vocabulary:color-mix(in srgb, var(--accent-color) 35%, var(--accent-word-family));--accent-vocabulary-meaning:#3b82c4;--accent-vocabulary-usage:#a34fa6;--accent-link-multi:color-mix(in srgb, var(--accent-color) 52%, var(--accent-word-family))}:root[data-theme=dark] .app-container[data-book-key=biene-maja]{--accent-color:#fbbf24;--accent-word-family:#f472b6;--accent-audio-meaning-match:#2dd4bf;--accent-semantic-nuance:#c4a7d5;--accent-vocabulary:color-mix(in srgb, var(--accent-color) 35%, var(--accent-word-family));--accent-vocabulary-meaning:#93c5fd;--accent-vocabulary-usage:#f0abfc;--accent-link-multi:color-mix(in srgb, var(--accent-color) 52%, var(--accent-word-family))}:root[data-text-scale=large]{--text-scale:1.15}:root[data-text-scale=xlarge]{--text-scale:1.3}:root{--content-width-reading:50rem;--content-width-exercise:57.5rem;--content-width-legal:60rem;--content-width-shell:77.5rem;--content-width-skeleton-card:53.75rem;--sidebar-width:18.75rem;--sidebar-width-collapsed:6.5rem;--sidebar-width-mobile:min(21rem, 86vw);--page-padding-x:var(--space-8);--page-padding-y:var(--space-16);--page-padding-mobile-x:var(--space-4);--page-padding-mobile-y:var(--space-6);--surface-card-padding:var(--space-8);--surface-card-padding-mobile:var(--space-5);--focus-outline-width:2px;--focus-outline-offset-sm:2px;--focus-outline-offset-md:3px;--control-size-sm:2rem;--control-size-md:2.2rem;--control-size-lg:2.4rem;--control-size-xl:2.75rem;--control-size-2xl:2.85rem;--icon-size-sm:1.35rem;--icon-size-md:1.45rem;--icon-size-lg:1.55rem;--surface-shadow-card:var(--shadow-card);--surface-shadow-raised:var(--shadow-offset);--surface-shadow-raised-strong:var(--shadow-offset-strong)}*{box-sizing:border-box}html{font-size:calc(16px * var(--text-scale,1));scrollbar-gutter:stable;scrollbar-width:thin;scrollbar-color:color-mix(in srgb, var(--text-secondary) 24%, var(--bg-primary)) color-mix(in srgb, var(--bg-primary) 92%, white)}[data-theme=dark] html{scrollbar-color:color-mix(in srgb, var(--text-primary) 52%, var(--border-color)) color-mix(in srgb, var(--bg-primary) 78%, #0b1220)}html::-webkit-scrollbar{width:.72rem}html::-webkit-scrollbar-track{background:color-mix(in srgb, var(--bg-primary) 92%, white)}html::-webkit-scrollbar-thumb{background:color-mix(in srgb, var(--text-secondary) 24%, var(--bg-primary));border:.16rem solid color-mix(in srgb, var(--bg-primary) 92%, white)}html::-webkit-scrollbar-thumb:hover{background:color-mix(in srgb, var(--text-secondary) 38%, var(--bg-primary))}[data-theme=dark] html::-webkit-scrollbar-track{background:color-mix(in srgb, var(--bg-primary) 78%, #0b1220)}[data-theme=dark] html::-webkit-scrollbar-thumb{background:color-mix(in srgb, var(--text-primary) 52%, var(--border-color));border-color:color-mix(in srgb, var(--bg-primary) 78%, #0b1220)}[data-theme=dark] html::-webkit-scrollbar-thumb:hover{background:color-mix(in srgb, var(--text-primary) 68%, var(--border-color))}body{font-family:var(--font-family-sans);font-size:var(--font-size-base);line-height:var(--line-height-normal);background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--duration-base) var(--easing-standard), color var(--duration-base) var(--easing-standard);margin:0}button,input,select,textarea{font:inherit}button{-webkit-tap-highlight-color:transparent}#root{min-height:100vh;display:flex}.bookarium-portal.portal-status-page,:root[data-theme=dark] .bookarium-portal.portal-status-page{background:var(--portal-canvas)}.portal-status-page .portal-status{min-height:0;padding-block:clamp(2rem,5vh,4rem)}.bookarium-portal .portal-status-copy{width:min(100%,44rem);box-shadow:none;text-align:center;background:0 0;border:0;border-radius:0;margin-inline:auto;padding:0;overflow:visible}.portal-status-lake{width:100%;height:auto;margin:0 auto clamp(1.5rem,4vh,2.5rem);display:block}.portal-status-lake[hidden]{display:none}.bookarium-portal .portal-status-copy h1{letter-spacing:-.025em;text-wrap:balance;max-width:28ch;margin-inline:auto;font-size:clamp(1.5rem,3.5vw,2.25rem);line-height:1.2}.bookarium-portal .portal-status-copy>p:last-of-type{text-wrap:pretty;max-width:42ch;margin-top:.875rem}.bookarium-portal .portal-status-copy .portal-primary-action{border-color:var(--portal-action);background:var(--portal-action);color:#fff;min-height:2.75rem;margin-top:1.5rem}.bookarium-portal .portal-status-copy .portal-primary-action:hover{border-color:var(--portal-action-hover);background:var(--portal-action-hover);color:#fff}.bookarium-portal .portal-status-copy .portal-primary-action:focus-visible{outline:2px solid var(--portal-focus);outline-offset:4px}.progress-sync-notice{inset-inline:var(--space-4);bottom:calc(var(--space-4) + env(safe-area-inset-bottom));z-index:1500;max-width:34rem;padding:var(--space-4);color:var(--text-primary);background:var(--card-bg);border:1px solid var(--border-color);box-shadow:var(--surface-shadow-card);margin-inline:auto;position:fixed}.progress-sync-notice p{margin:0}.progress-sync-notice .bookarium-button{background:var(--card-bg);color:var(--text-primary)}.progress-sync-notice .bookarium-button:focus-visible{outline:2px solid var(--accent-color);outline-offset:3px}.bookarium-app{background:radial-gradient(circle at 12% 4%, color-mix(in srgb, var(--accent-color) 10%, transparent), transparent 32rem), var(--bg-primary);width:100%;min-width:0;min-height:100vh;color:var(--text-primary);flex:auto}.bookarium-page{width:min(100% - 2 * var(--space-5), 72rem);padding:clamp(var(--space-8), 8vw, var(--space-12)) 0;margin:0 auto}.bookarium-hero{max-width:46rem;margin-bottom:var(--space-8)}.bookarium-hero h1{margin:var(--space-2) 0 var(--space-3);font-size:clamp(2rem,6vw,4rem);line-height:var(--line-height-tight)}.bookarium-hero>p:last-child{color:var(--text-secondary);font-size:var(--font-size-lg);line-height:var(--line-height-relaxed)}.bookarium-eyebrow{color:var(--accent-color);font-size:var(--font-size-xs);font-weight:var(--font-weight-heavy);letter-spacing:var(--letter-spacing-caps);text-transform:uppercase;margin:0}.bookarium-grid{gap:var(--space-5);grid-template-columns:repeat(auto-fit,minmax(min(100%,21rem),1fr));display:grid}.bookarium-card{gap:var(--space-4);min-height:11rem;padding:var(--space-6);border:1px solid var(--border-color);background:var(--card-bg);color:var(--text-primary);box-shadow:var(--surface-shadow-card);transition:transform var(--duration-base) var(--easing-standard), border-color var(--duration-base) var(--easing-standard);grid-template-columns:auto 1fr auto;align-items:center;text-decoration:none;display:grid}.bookarium-card:hover,.bookarium-card:focus-visible{border-color:var(--accent-color);transform:translateY(-3px)}.bookarium-card:focus-visible{outline:var(--focus-outline-width) solid var(--accent-color);outline-offset:var(--focus-outline-offset-md)}.bookarium-card-icon{background:color-mix(in srgb, var(--accent-color) 13%, var(--card-bg));width:3.25rem;height:3.25rem;color:var(--accent-color);place-items:center;display:grid}.bookarium-card-copy h2,.bookarium-card-copy p{margin:0}.bookarium-card-copy h2{margin:var(--space-1) 0 var(--space-2)}.bookarium-card-copy p{color:var(--text-secondary)}.bookarium-card-meta{font-size:var(--font-size-xs);font-weight:var(--font-weight-bold);text-transform:uppercase;letter-spacing:var(--letter-spacing-caps)}.bookarium-card-locked{opacity:.72}.bookarium-chapter-list{border-top:1px solid var(--border-color);margin:0;padding:0;list-style:none}.bookarium-chapter-list li{border-bottom:1px solid var(--border-color)}.bookarium-chapter-link{align-items:center;gap:var(--space-4);padding:var(--space-5) var(--space-3);color:var(--text-primary);grid-template-columns:minmax(7rem,.4fr) 1fr auto;text-decoration:none;display:grid}.bookarium-chapter-link:hover,.bookarium-chapter-link:focus-visible{background:color-mix(in srgb, var(--accent-color) 7%, transparent)}.bookarium-chapter-number{color:var(--text-secondary);font-size:var(--font-size-sm);font-weight:var(--font-weight-bold)}.bookarium-chapter-title{align-items:center;gap:var(--space-2);font-weight:var(--font-weight-semibold);display:inline-flex}.bookarium-status{place-items:center;min-height:calc(100vh - 4.25rem);display:grid}.bookarium-status-card{width:min(100%,36rem);padding:var(--space-8);border:1px solid var(--border-color);background:var(--card-bg);text-align:center;box-shadow:var(--surface-shadow-card)}.bookarium-status-card h1{margin:var(--space-2) 0}.bookarium-status-card>p:last-of-type{color:var(--text-secondary);line-height:var(--line-height-relaxed)}.bookarium-button{margin-top:var(--space-4);padding:var(--space-3) var(--space-5);border:1px solid var(--accent-color);background:var(--accent-color);color:var(--text-on-accent,white);font:inherit;font-weight:var(--font-weight-bold);cursor:pointer}.bookarium-reader-shell{flex-direction:column;height:100vh;display:flex;overflow:hidden}.app-main-content>.bookarium-reader-shell{height:100%}.bookarium-reader-shell .chapter-view{flex:1;min-height:0}.bookarium-app .app-content-skeleton-view{background:var(--bg-primary)}.bookarium-supplemental-status{border-bottom:1px solid color-mix(in srgb, var(--border-color) 72%, transparent);background:color-mix(in srgb, var(--accent-color) 10%, var(--card-bg));color:var(--text-primary);text-align:center;padding:.65rem 1rem;font-size:.9rem;line-height:1.4}@media (width<=680px){.bookarium-chapter-link{grid-template-columns:1fr auto}.bookarium-chapter-number{grid-column:1/-1}}.app-container{background:var(--bg-primary);width:100%;height:100vh;min-height:100vh;display:flex}.app-main-shell{flex-direction:column;flex:1;min-width:0;height:100vh;display:flex}.app-main-shell-sidebar-collapsed{flex-basis:0}.app-main-content{flex:1;min-height:0}.app-main-content:focus,.app-main-content:focus-visible{outline:none}.app-main-content-sidebar-collapsed{width:100%}.app-status-card{flex-direction:column;gap:1rem;display:flex}.app-status-card h2,.app-status-card p{margin:0}.backend-unavailable-view{min-height:100%;padding:clamp(var(--space-5), 6vh, var(--space-12)) clamp(var(--space-4), 3vw, var(--space-8));background:radial-gradient(circle at 50% 22%, #bfe2e147, transparent 38%), linear-gradient(180deg, color-mix(in srgb, var(--bg-primary) 92%, #edf7f4), var(--bg-primary));place-items:center;display:grid}.backend-unavailable-view .backend-unavailable-card{width:min(100%,72rem);box-shadow:none;text-align:center;background:0 0;border:0;border-radius:0;align-items:center;gap:0;padding:0}.backend-unavailable-illustration{aspect-ratio:1672/941;background:linear-gradient(135deg, color-mix(in srgb, #dcefe8 82%, var(--card-bg)), color-mix(in srgb, #c5e4e5 76%, var(--card-bg)));width:100%;box-shadow:none;border-radius:0;position:relative;overflow:hidden}.backend-unavailable-illustration:before,.backend-unavailable-illustration:after{content:"";pointer-events:none;position:absolute}.backend-unavailable-illustration:before{background:linear-gradient(168deg,#0000 0 39%,#93b879b3 40% 48%,#0000 49%),linear-gradient(192deg,#0000 0 44%,#759e6f9e 45% 53%,#0000 54%);inset:18% 0 0}.backend-unavailable-illustration:after{background:linear-gradient(#b8dcdfc7,#82bcc6ad);inset:55% 0 0}.backend-unavailable-image{object-fit:cover;width:100%;height:100%;display:block}.backend-unavailable-image-frame{--backend-frame-inset:clamp(.45rem, 1vw, .8rem);z-index:1;box-sizing:border-box;filter:drop-shadow(0 1.1rem 2.5rem #20312d29);position:absolute;inset:0;overflow:hidden}.backend-unavailable-image-viewport{z-index:1;position:absolute;inset:0}.backend-unavailable-image-frame:before,.backend-unavailable-image-frame:after{content:"";z-index:2;pointer-events:none;position:absolute}.backend-unavailable-image-frame:before{border:2px solid #b39f7f;inset:0;box-shadow:inset 0 0 0 .3rem #f8f1e4e0,inset 0 0 0 .42rem #81653b38}.backend-unavailable-image-frame:after{inset:var(--backend-frame-inset);background:linear-gradient(#8b6d42 0 0) 0 0/2rem 2px no-repeat,linear-gradient(#8b6d42 0 0) 0 0/2px 2rem no-repeat,linear-gradient(#8b6d42 0 0) 100% 0/2rem 2px no-repeat,linear-gradient(#8b6d42 0 0) 100% 0/2px 2rem no-repeat,linear-gradient(#8b6d42 0 0) 0 100%/2rem 2px no-repeat,linear-gradient(#8b6d42 0 0) 0 100%/2px 2rem no-repeat,linear-gradient(#8b6d42 0 0) 100% 100%/2rem 2px no-repeat,linear-gradient(#8b6d42 0 0) 100% 100%/2px 2rem no-repeat,radial-gradient(circle at 0 0,#8b6d42e0 0 .16rem,#0000 .18rem),radial-gradient(circle at 100% 0,#8b6d42e0 0 .16rem,#0000 .18rem),radial-gradient(circle at 0 100%,#8b6d42e0 0 .16rem,#0000 .18rem),radial-gradient(circle at 100% 100%,#8b6d42e0 0 .16rem,#0000 .18rem)}.backend-unavailable-image[hidden]{display:none}.backend-unavailable-action{z-index:2;left:50%;bottom:var(--space-5);position:absolute;transform:translate(-50%)}.backend-unavailable-copy{z-index:2;top:clamp(var(--space-3), 4vw, var(--space-6));width:calc(100% - (2 * var(--space-6)));position:absolute;left:50%;transform:translate(-50%)}.backend-unavailable-copy h2{color:#20312d;font-size:clamp(var(--font-size-2xl), 5vw, var(--font-size-3xl));line-height:var(--line-height-tight);text-shadow:0 1px #fffc,0 3px 14px #ffffffd9}.backend-unavailable-copy p{margin-top:var(--space-2);color:#000;font-size:clamp(var(--font-size-sm), 2.1vw, var(--font-size-base));font-weight:var(--font-weight-semibold);letter-spacing:normal;text-transform:none;text-shadow:0 1px #ffffffb8,0 2px 10px #ffffffc7}.shell-view .empty-content{max-width:var(--content-width-legal);width:100%;margin:var(--space-12) auto;box-shadow:none;border-radius:var(--radius-none);padding:var(--space-10) var(--space-7) var(--space-12);background:0 0}.legal-card,.legal-copy{text-align:left}.legal-card h2{font-size:var(--font-size-2xl)}.legal-copy h3{margin-top:var(--space-6);margin-bottom:var(--space-2);font-size:var(--font-size-lg)}.legal-copy p{margin-bottom:var(--space-3);font-size:var(--font-size-base);line-height:var(--line-height-relaxed)}.legal-copy ul{padding-left:var(--space-5);margin-bottom:var(--space-3)}.legal-copy a{color:var(--accent-color);text-underline-offset:.14em;text-decoration:underline;text-decoration-thickness:.08em}.legal-copy a:hover,.legal-copy a:focus-visible{color:var(--text-primary)}.legal-copy a:focus-visible{outline:var(--focus-outline-width) solid var(--accent-color);outline-offset:var(--focus-outline-offset-md);border-radius:4px}.app-status-detail{font-size:var(--font-size-sm);line-height:var(--line-height-normal);color:var(--text-secondary)}.app-status-action{min-width:12rem;padding:var(--space-3) var(--space-4);border:1px solid var(--border-color);background:var(--bg-primary);color:var(--text-primary);font:inherit;font-weight:var(--font-weight-bold);cursor:pointer;transition:border-color var(--duration-base) var(--easing-standard), background-color var(--duration-base) var(--easing-standard), color var(--duration-base) var(--easing-standard);align-self:center}.app-status-action:hover,.app-status-action:focus-visible{border-color:var(--accent-color)}.app-status-action:focus-visible{outline:var(--focus-outline-width) solid var(--accent-color);outline-offset:var(--focus-outline-offset-md)}.app-sidebar-backdrop,.mobile-topbar{display:none}.mobile-topbar-actions{align-items:center;gap:.6rem;display:inline-flex}.mobile-topbar-account-button{width:var(--control-size-lg);height:var(--control-size-lg);color:var(--text-primary);cursor:pointer;transition:color var(--duration-base) var(--easing-standard), background-color var(--duration-base) var(--easing-standard);background:0 0;border:0;justify-content:center;align-items:center;margin-left:-.25rem;padding:0;display:inline-flex}.mobile-topbar-account-button:hover{background:color-mix(in srgb, var(--text-primary) 8%, transparent)}.mobile-topbar-account-button:focus-visible{outline:var(--focus-outline-width) solid var(--accent-color);outline-offset:var(--focus-outline-offset-md)}.mobile-topbar-account-icon{width:var(--icon-size-sm);height:var(--icon-size-sm)}.mobile-topbar-dictionary-toggle{width:var(--control-size-lg);height:var(--control-size-lg);color:var(--text-primary);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;padding:0;transition:color .15s;display:inline-flex;position:relative}.mobile-topbar-dictionary-toggle:hover,.mobile-topbar-dictionary-toggle:focus-visible,.mobile-topbar-dictionary-toggle-active{color:var(--accent-word-family)}.mobile-topbar-dictionary-toggle-active .mobile-topbar-dictionary-icon path{fill:color-mix(in srgb, var(--accent-word-family) 12%, transparent)}.mobile-topbar-dictionary-toggle:focus-visible{outline:2px solid var(--accent-word-family);outline-offset:2px}.mobile-topbar-dictionary-icon{width:var(--icon-size-sm);height:var(--icon-size-sm)}.mobile-topbar-dictionary-toggle-loading .mobile-topbar-dictionary-icon{opacity:.55}.mobile-topbar-dictionary-toggle-disabled,.mobile-topbar-dictionary-toggle:disabled{cursor:not-allowed;opacity:.5}.mobile-topbar-dictionary-toggle-disabled:hover,.mobile-topbar-dictionary-toggle:disabled:hover{color:var(--text-primary)}.mobile-topbar-dictionary-spinner{border:2px solid color-mix(in srgb, var(--accent-word-family) 24%, transparent);border-top-color:var(--accent-word-family);pointer-events:none;border-radius:50%;animation:.8s linear infinite mobile-topbar-dictionary-spin;position:absolute;inset:.35rem}.desktop-dictionary-loading-toggle{right:clamp(1rem, calc((100vw - var(--content-width-reading)) / 2 + 1rem), 3rem);bottom:calc(1rem + env(safe-area-inset-bottom,0px));z-index:20;position:fixed}.desktop-dictionary-loading-toggle .chapter-dictionary-floating-toggle-disabled{cursor:not-allowed;opacity:.5}@keyframes mobile-topbar-dictionary-spin{to{transform:rotate(360deg)}}.mobile-account-button{border-color:var(--border-color);background:var(--card-bg)}.skeleton-block{border-radius:var(--radius-none);background:color-mix(in srgb, var(--border-color) 58%, var(--card-bg));position:relative;overflow:hidden}.skeleton-block:after{content:"";animation:skeleton-shimmer var(--duration-skeleton) var(--easing-emphasized) infinite;background:linear-gradient(90deg,#0000 0%,#ffffff57 50%,#0000 100%);position:absolute;inset:0;transform:translate(-100%)}.app-content-skeleton-view{min-height:100%;display:block}.app-content-skeleton-status,.app-route-announcer{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.app-content-skeleton-shell{max-width:var(--content-width-shell);padding:var(--page-padding-y) var(--page-padding-x);gap:var(--space-8);box-sizing:border-box;grid-template-columns:minmax(0,1fr);min-height:100%;margin:0 auto;display:grid}.app-content-skeleton-card{max-width:var(--content-width-skeleton-card);width:100%;padding:var(--surface-card-padding);background:var(--card-bg);box-shadow:var(--surface-shadow-card);box-sizing:border-box;min-height:100%;margin:0 auto}.app-content-skeleton-header{flex-direction:column;align-items:center;gap:.9rem;margin-bottom:2rem;display:flex}.app-content-skeleton-kicker{width:6.5rem;height:.85rem}.app-content-skeleton-title{border-radius:1rem;width:min(30rem,88%);height:2.6rem}.app-content-skeleton-title-secondary{width:min(18rem,62%);height:1rem}.app-content-skeleton-audio{border:1px solid var(--border-color);flex-direction:column;gap:.8rem;margin-bottom:1.75rem;padding:1rem 1.1rem;display:flex}.app-content-skeleton-audio-label{width:5rem;height:.8rem}.app-content-skeleton-audio-bar{border-radius:.9rem;width:100%;height:2.75rem}.app-content-skeleton-copy{flex-direction:column;gap:.9rem;display:flex}.app-content-skeleton-copy-secondary{margin-top:1.75rem}.app-content-skeleton-exercise-content{flex-direction:column;gap:1rem;display:flex}.app-content-skeleton-exercise-heading{justify-content:space-between;align-items:center;gap:.75rem;display:flex}.app-content-skeleton-exercise-badge{border-radius:.7rem;width:7rem;height:1rem}.app-content-skeleton-exercise-meta{border-radius:.7rem;width:4.5rem;height:.95rem}.app-content-skeleton-exercise-title{border-radius:.8rem;width:min(24rem,92%);height:1.45rem}.app-content-skeleton-exercise-panel{border:1px solid var(--border-color);flex-direction:column;gap:.8rem;padding:1rem;display:flex}.app-content-skeleton-exercise-panel-secondary{margin-top:.2rem}.app-content-skeleton-exercise-actions{flex-wrap:wrap;gap:.7rem;display:flex}.app-content-skeleton-exercise-action{border-radius:.8rem;width:min(8.5rem,48%);min-width:6.5rem;height:2.4rem}.app-content-skeleton-exercise-action-secondary{width:min(10.5rem,56%)}.app-content-skeleton-line{border-radius:.7rem;width:100%;height:1rem}.app-content-skeleton-line-short{width:72%}@keyframes skeleton-shimmer{to{transform:translate(100%)}}@media (width<=959.98px){.backend-unavailable-view{padding:var(--space-4) var(--page-padding-mobile-x) calc(var(--space-8) + env(safe-area-inset-bottom,0px));place-items:start center}.backend-unavailable-illustration{align-items:center;gap:var(--space-4);aspect-ratio:auto;background:0 0;flex-direction:column;display:flex;overflow:visible}.backend-unavailable-illustration:before,.backend-unavailable-illustration:after{display:none}.backend-unavailable-image-frame{aspect-ratio:1672/941;order:2;width:100%;position:relative;inset:auto}.backend-unavailable-copy{order:1;width:100%;position:static;transform:none}.backend-unavailable-copy p{color:#5e6b68}:root[data-theme=dark] .backend-unavailable-copy h2,:root[data-theme=dark] .backend-unavailable-copy p{color:var(--text-on-dark);text-shadow:none}.backend-unavailable-action{order:3;position:static;transform:none}.backend-unavailable-action .app-status-action{color:#20312d;background:#fff;border-color:#d7dad9}.shell-view .empty-content{margin:0 auto}.app-container{height:100dvh;min-height:100dvh;position:relative;overflow:hidden}.app-main-shell{height:100dvh}.app-sidebar-backdrop{background:var(--overlay-scrim);opacity:0;pointer-events:none;transition:opacity var(--duration-base) var(--easing-standard);z-index:1100;will-change:opacity;border:0;padding:0;display:block;position:fixed;inset:0}.app-sidebar-backdrop.visible{opacity:1;pointer-events:auto}.mobile-topbar{padding:calc(.85rem + env(safe-area-inset-top,0px)) calc(1rem + env(safe-area-inset-right,0px)) .85rem calc(1rem + env(safe-area-inset-left,0px));border-bottom:1px solid var(--border-section);background:var(--mobile-topbar-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);align-items:center;gap:.7rem;display:flex}.mobile-menu-button{min-height:var(--control-size-xl);min-width:var(--control-size-xl);padding:var(--space-2-5);border:1px solid var(--border-color);background:var(--card-bg);color:var(--text-primary);font:inherit;font-weight:var(--font-weight-bold);cursor:pointer;flex:none;justify-content:center;align-items:center;display:inline-flex}.mobile-menu-button:focus-visible{outline:var(--focus-outline-width) solid var(--accent-color);outline-offset:var(--focus-outline-offset-md)}.mobile-menu-icon{flex:none}.mobile-menu-label{display:none}.mobile-topbar-copy{flex-direction:column;flex:1;gap:.15rem;min-width:0;display:flex}.mobile-topbar-kicker,.mobile-topbar-title{margin:0}.mobile-topbar-kicker{font-size:var(--font-size-xs);font-weight:var(--font-weight-heavy);letter-spacing:var(--letter-spacing-caps);text-transform:uppercase;color:var(--text-secondary);text-overflow:ellipsis;white-space:nowrap;line-height:1.1;overflow:hidden}.mobile-topbar-kicker-tooltip-trigger{min-width:0}.mobile-topbar-kicker-tooltip-trigger:focus-visible{outline:var(--focus-outline-width) solid var(--accent-color);outline-offset:2px;border-radius:2px}.mobile-topbar-title{color:var(--text-primary);font-size:.95rem;font-weight:700;line-height:1.2}.mobile-topbar-title-row{align-items:baseline;gap:.4rem;min-width:0;display:flex}.mobile-topbar-title-row .mobile-topbar-title{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.mobile-topbar .difficulty-badge.mobile-topbar-difficulty-badge{flex-shrink:0;width:1.2rem;min-width:1.2rem;min-height:1.2rem}.mobile-topbar-actions{flex:none}.legal-view{padding:var(--space-3) var(--page-padding-mobile-x) calc(var(--page-padding-mobile-y) + var(--space-4))}.legal-view .legal-card.empty-content{margin:0 auto;padding-top:0}.app-content-skeleton-shell{padding:var(--page-padding-mobile-y) var(--page-padding-mobile-x) calc(var(--page-padding-mobile-y) + var(--space-4));gap:var(--space-5)}.app-content-skeleton-card{box-shadow:none;background:0 0;padding:0}.app-content-skeleton-header{align-items:flex-start;margin-bottom:1.4rem}.app-content-skeleton-title{width:min(18rem,100%);height:2rem}.app-content-skeleton-title-secondary{width:min(11rem,80%)}.app-content-skeleton-exercise-heading{flex-direction:column;align-items:flex-start}.app-content-skeleton-exercise-badge{width:6rem}.app-content-skeleton-exercise-meta{width:5.5rem}.app-content-skeleton-exercise-title{width:min(16rem,100%)}.app-content-skeleton-exercise-action,.app-content-skeleton-exercise-action-secondary{width:100%}}.app-route-state{color:#183b2b;text-align:center;background:#f6f1e7;place-content:center;justify-items:center;gap:1rem;min-height:100dvh;padding:2rem;display:grid}.app-route-state h1,.app-route-state p{margin:0}.app-route-state button{color:#fff;font:inherit;cursor:pointer;background:#183b2b;border:0;border-radius:999px;padding:.75rem 1.1rem}.app-route-state__spinner{border:.2rem solid #183b2b33;border-top-color:#183b2b;border-radius:50%;width:2rem;height:2rem;animation:.7s linear infinite app-route-spin}@keyframes app-route-spin{to{transform:rotate(1turn)}}@media (prefers-reduced-motion:reduce){.app-route-state__spinner{animation-duration:1.5s}}