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.app-root{--background:#fffdf6;--foreground:#33324a;--student-nav-height:4rem;--student-safe-bottom:env(safe-area-inset-bottom,0px);--student-task-bottom:0px;--font-sans:var(--font-nunito), ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-display:var(--font-baloo), "Baloo 2", system-ui, sans-serif;--font-mono:var(--font-geist-mono), ui-monospace, SFMono-Regular, Menlo, monospace;--color-white:#fff;--color-black:#33324a;--color-slate-50:#f8f3ea;--color-slate-100:#f0e9da;--color-slate-200:#e6dcc9;--color-slate-300:#d6cbb4;--color-slate-400:#696d7d;--color-slate-500:#5c6172;--color-slate-600:#464b5c;--color-slate-700:#363a48;--color-slate-800:#272b37;--color-slate-900:#1b1f2a;--color-slate-950:#14171f;--color-gray-50:#f8f3ea;--color-gray-100:#f0e9da;--color-gray-200:#e6dcc9;--color-gray-300:#d6cbb4;--color-gray-400:#696d7d;--color-gray-500:#5c6172;--color-gray-600:#464b5c;--color-gray-700:#363a48;--color-gray-800:#272b37;--color-gray-900:#1b1f2a;--color-gray-950:#14171f;--color-neutral-50:#f8f3ea;--color-neutral-100:#f0e9da;--color-neutral-200:#e6dcc9;--color-neutral-300:#d6cbb4;--color-neutral-400:#696d7d;--color-neutral-500:#5c6172;--color-neutral-600:#464b5c;--color-neutral-700:#363a48;--color-neutral-800:#272b37;--color-neutral-900:#1b1f2a;--color-neutral-950:#14171f;--color-red-50:#fceeea;--color-red-100:#fad9d0;--color-red-200:#f2b5a6;--color-red-300:#e88b78;--color-red-400:#dd6450;--color-red-500:#ce4a35;--color-red-600:#bc3b28;--color-red-700:#9e2f20;--color-red-800:#7f271b;--color-red-900:#6a2218;--color-rose-50:#fcecee;--color-rose-100:#f9d6db;--color-rose-200:#f0aeb8;--color-rose-300:#e3808f;--color-rose-400:#d2596c;--color-rose-500:#bd4054;--color-rose-600:#a23243;--color-rose-700:#842836;--color-amber-50:#fbf3e2;--color-amber-100:#f6e4be;--color-amber-200:#efce8a;--color-amber-300:#e5b257;--color-amber-400:#d99a2e;--color-amber-500:#c9851a;--color-amber-600:#ae6e12;--color-amber-700:#8c5710;--color-amber-800:#6f4513;--color-amber-900:#5a380f;--color-yellow-50:#faf4dd;--color-yellow-100:#f3e7b3;--color-yellow-700:#876a10;--color-yellow-800:#6c5410;--color-emerald-50:#eaf3ec;--color-emerald-100:#cfe6d3;--color-emerald-200:#a6d0ae;--color-emerald-300:#74b583;--color-emerald-400:#479a60;--color-emerald-500:#2f8049;--color-emerald-600:#26693c;--color-emerald-700:#1f5532;--color-emerald-800:#1a4429;--color-green-50:#eaf3ec;--color-green-100:#cfe6d3;--color-green-200:#a6d0ae;--color-green-300:#74b583;--color-green-400:#479a60;--color-green-500:#2f8049;--color-green-600:#26693c;--color-green-700:#1f5532;--color-green-800:#1a4429;--color-blue-50:#ebf0f6;--color-blue-100:#d2deec;--color-blue-200:#aac2dc;--color-blue-300:#7ba0c6;--color-blue-400:#517fb0;--color-blue-500:#3a6699;--color-blue-600:#2f5380;--color-blue-700:#274468;--color-blue-800:#213954;--color-indigo-50:#eceef8;--color-indigo-100:#d6daf0;--color-indigo-500:#4d57a6;--color-indigo-700:#353c7a;--color-sky-100:#d4e6f1;--color-sky-700:#235273;--color-violet-100:#e2dcf2;--color-violet-700:#4a3c84;--color-purple-100:#e6dcf0;--color-purple-600:#6b4a9c;--color-purple-700:#553a80;--color-purple-800:#432f64;background:var(--background);color:var(--foreground);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;min-height:100%}.student-shell{--student-sidebar-width:clamp(10.5rem, 10vw, 11.5rem);--student-task-bottom:calc(var(--student-nav-height) + var(--student-safe-bottom));min-height:100dvh}.student-main{min-width:0;padding-bottom:var(--student-task-bottom)}.student-shell[data-bukki-focus]{height:100dvh;min-height:0;overflow:hidden}.student-shell[data-bukki-focus] .student-navigation{display:none}.student-shell[data-bukki-focus] .student-main{height:100%;min-height:0;padding-bottom:0;overflow:hidden}.student-shell[data-bukki-focus=quiz] .student-main{padding-bottom:env(safe-area-inset-bottom);overflow-y:auto}.student-shell .lesson-feedback{bottom:var(--student-task-bottom)}.student-task{width:100%;height:calc(100svh - var(--student-task-bottom));height:calc(100dvh - var(--student-task-bottom));max-height:calc(100dvh - var(--student-task-bottom));flex-direction:column;min-height:0;display:flex;overflow:hidden}.student-task-header,.student-task-actions{flex:none}.student-task-content{overscroll-behavior-y:contain;-webkit-overflow-scrolling:touch;flex:auto;min-width:0;min-height:0;overflow:hidden auto}.stage-action{flex:none;width:100%}.practice-player .stage-action{color:#fff;background-color:#087a4b;box-shadow:0 5px #055b38}.practice-player .stage-action:disabled{box-shadow:none}.lesson-player .student-task-actions{padding-bottom:max(2rem, var(--student-safe-bottom))}.lesson-controls{padding-bottom:max(.75rem, var(--student-safe-bottom))}.lesson-feedback{padding-bottom:max(1.5rem, env(safe-area-inset-bottom,0px))}@media (max-height:40rem){.student-task-content{scroll-padding-bottom:4.5rem}.exercise-decorative{transform-origin:50%;transform:scale(.82)}}.student-navigation{z-index:40;inset-inline:0;min-width:0;position:fixed;bottom:0}.student-navigation-brand,.student-navigation-profile{display:none}.student-navigation-list{width:min(100%,28rem);padding:0 .25rem env(safe-area-inset-bottom);justify-content:space-around;align-items:stretch;margin-inline:auto;display:flex;position:relative}.student-navigation-item{flex:1 1 0}.student-navigation-link{height:4rem;color:var(--color-slate-500);border-radius:1rem;flex-direction:column;justify-content:center;align-items:center;gap:.2rem;font-size:.6875rem;font-weight:700;transition:color .16s,background-color .16s,transform .16s;display:flex}.student-navigation-link:active{transform:scale(.96)}.student-navigation-link.is-active{color:#08784a;background:#e4f3e9}.student-navigation-icon{width:1.45rem;height:1.45rem}.learn-backdrop{position:fixed;inset:0}.learn-backdrop-media{width:150vw}.learn-backdrop-image{object-position:left center}@media (min-width:48rem) and (any-pointer:fine),(min-width:48rem) and (orientation:landscape){.student-shell{--student-task-bottom:0px;grid-template-columns:var(--student-sidebar-width) minmax(0, 1fr);display:grid}.student-main{grid-column:2;padding-bottom:0}.student-shell[data-bukki-focus]{height:auto;min-height:100dvh;overflow:visible}.student-shell[data-bukki-focus] .student-navigation{display:flex}.student-shell[data-bukki-focus] .student-main{height:auto;min-height:100dvh;padding-bottom:0;overflow:visible}.student-shell .lesson-feedback{bottom:0;inset-inline-start:var(--student-sidebar-width);inset-inline-end:0}.student-navigation{z-index:30;width:var(--student-sidebar-width);background:#fffefa;border-right:1px solid #e9e1d4;flex-direction:column;align-items:stretch;height:100dvh;padding:clamp(1.35rem,3vh,2rem) .7rem 1.25rem;display:flex;position:sticky;top:0;bottom:auto}.student-navigation-frost{display:none}.student-navigation-brand{width:clamp(5rem,6vw,5.625rem);margin-inline:auto;display:block}.student-navigation-list{flex-direction:column;gap:.45rem;width:100%;margin-top:clamp(1.6rem,4vh,2.5rem);padding:0;display:flex}.student-navigation-item{flex:none}.student-navigation-link{border-radius:.875rem;flex-direction:row;justify-content:flex-start;gap:.55rem;height:auto;min-height:2.85rem;padding:.65rem .55rem;font-size:.75rem}.student-navigation-link:hover{color:var(--color-slate-950);background:#f7f2e9;transform:translateY(-1px)}.student-navigation-link.is-active,.student-navigation-link.is-active:hover{color:#176b48;background:#e2f3e9}.student-navigation-icon{flex:none;width:1.3rem;height:1.3rem}.student-navigation-profile{color:#7f3a42;width:2.5rem;height:2.5rem;font-family:var(--font-display);background:#fbd0c7;border:1px solid #d9cdbb;border-radius:.875rem;place-items:center;margin:auto auto 0;font-size:.875rem;font-weight:800;transition:transform .15s;display:grid;position:relative;overflow:hidden;box-shadow:0 3px #d8a099}.student-navigation-profile:hover{transform:translateY(-2px)}.learn-backdrop{inset-inline-start:var(--student-sidebar-width)}.learn-backdrop-media{inset-block:0;width:auto;left:-8rem;right:-8rem}.learn-backdrop-image{object-position:left center}}@media (min-width:64rem) and (any-pointer:fine),(min-width:64rem) and (orientation:landscape){.learn-backdrop-media{left:-5rem;right:-5rem}}@media (min-width:80rem) and (any-pointer:fine),(min-width:80rem) and (orientation:landscape){.learn-backdrop-image{object-position:42% center}}@media (min-width:100rem) and (any-pointer:fine),(min-width:100rem) and (orientation:landscape){.learn-backdrop-image{object-position:46% center}}.app-root .font-display{font-feature-settings:"ss01"}.app-root :focus-visible{outline-offset:2px;border-radius:2px;outline:2px solid #0eaa66}.app-root,.app-root *{scrollbar-width:thin;scrollbar-color:var(--color-slate-300) transparent}.app-root ::-webkit-scrollbar{width:10px;height:10px}.app-root ::-webkit-scrollbar-track{background:0 0}.app-root ::-webkit-scrollbar-thumb{background-color:var(--color-slate-300);border:3px solid var(--background);border-radius:9999px}.app-root ::-webkit-scrollbar-thumb:hover{background-color:var(--color-slate-400)}.app-root ::selection{background:var(--color-flame-200);color:var(--color-flame-900)}@keyframes app-rise{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.app-root .animate-rise{animation:.35s cubic-bezier(.16,1,.3,1) both app-rise}@media (prefers-reduced-motion:reduce){.app-root .animate-rise{animation:none}}@keyframes learn-accordion-in{0%{opacity:0;grid-template-rows:0fr}to{opacity:1;grid-template-rows:1fr}}@keyframes learn-current-pulse{0%,to{box-shadow:0 6px 18px #b638481f}50%{box-shadow:0 7px 22px #b6384838}}@keyframes learn-skeleton-glare{0%{transform:translate(-130%)}to{transform:translate(330%)}}.app-root .learn-accordion-panel{grid-template-rows:1fr;animation:.22s cubic-bezier(.16,1,.3,1) both learn-accordion-in;display:grid}.app-root .learn-level-progress{background:conic-gradient(#2f9d6b 0 var(--level-progress), #2f9d6b29 var(--level-progress) 360deg);box-shadow:inset 0 0 0 1px #2f9d6b33,0 4px 12px #2f80491a}.app-root .learn-welcome-copy{text-shadow:0 1px 2px #fffdf8,0 0 10px #fffdf8f5,0 0 20px #fffdf8d1}.app-root .learn-skeleton:after{content:"";background:linear-gradient(100deg,#0000,#ffffffb8,#0000);width:38%;animation:1.65s ease-in-out infinite learn-skeleton-glare;position:absolute;inset:0;transform:translate(-130%)}@media (prefers-reduced-motion:no-preference){.app-root .learn-current-row{animation:2.6s ease-in-out infinite learn-current-pulse}}@media (prefers-reduced-motion:reduce){.app-root .learn-accordion-panel,.app-root .learn-current-row,.app-root .learn-skeleton:after{transition:none;animation:none}}