:root{--bg: #04050a;--card: #181a26;--card-2: #222536;--line: #2f3350;--text: #f6f7fb;--muted: #b3b9d0;--pink: #ff5fa8;--pink-deep: #b3306f;--cyan: #67e8f9;--cyan-deep: #2b9db3;--yellow: #e4f15a;--grey: #4a4e63;--radius: 14px;--font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}h1,h2,h3,p,ul,ol{margin:0}ul,ol{padding:0;list-style:none}a{color:var(--cyan)}code{background:var(--card-2);padding:2px 6px;border-radius:6px;font-size:.9em}img,svg{max-width:100%}button{font-family:inherit}.muted{color:var(--muted)}.mt{margin-top:14px}.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}.skip-link{position:absolute;left:12px;top:-60px;z-index:100;background:var(--cyan);color:#04050a;padding:10px 16px;border-radius:8px;font-weight:700}.skip-link:focus{top:12px}:focus-visible{outline:3px solid var(--cyan);outline-offset:3px;border-radius:6px}main:focus{outline:none}.btn{--btn: var(--pink);--btn-deep: var(--pink-deep);--btn-text: #14040c;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 26px;border:0;border-radius:12px;cursor:pointer;background:var(--btn);color:var(--btn-text);font-weight:800;font-size:1rem;text-decoration:none;line-height:1.1;box-shadow:0 5px 0 var(--btn-deep);transition:transform .08s ease,box-shadow .08s ease,filter .15s ease}.btn:hover{filter:brightness(1.08)}.btn:active:not(:disabled){transform:translateY(4px);box-shadow:0 1px 0 var(--btn-deep)}.btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:0 5px 0 var(--btn-deep)}.btn-pink{--btn: var(--pink);--btn-deep: var(--pink-deep);--btn-text: #14040c}.btn-cyan{--btn: var(--cyan);--btn-deep: var(--cyan-deep);--btn-text: #031317}.btn-outline{background:transparent;color:var(--cyan);box-shadow:inset 0 0 0 2px var(--cyan)}.btn-outline:active:not(:disabled){transform:translateY(2px);box-shadow:inset 0 0 0 2px var(--cyan)}.btn-ghost{background:var(--card-2);color:var(--text);box-shadow:0 4px #0c0d15}.btn-small{padding:10px 18px;font-size:.95rem}.btn-block{width:100%}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}.card h2{font-size:1.25rem;font-weight:800;letter-spacing:-.01em}.label{font-size:.8rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}.label-pink{color:var(--pink)}.label-cyan{color:var(--cyan)}.page-title{font-size:clamp(2rem,4vw,2.75rem);font-weight:800;letter-spacing:-.02em;margin-bottom:20px}.notice{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:grid;gap:14px;justify-items:start;max-width:560px}.notice-error{border-color:var(--pink)}.skeleton{border-radius:var(--radius);background:linear-gradient(90deg,#14161f 25%,#1f2231,#14161f 75%);background-size:200% 100%;animation:shimmer 1.4s linear infinite}.page-loading{display:grid;gap:14px;width:min(760px,100%)}.center-page{min-height:100vh;display:grid;place-items:center;padding:24px}.bar{height:14px;background:#0c0d15;border:2px solid var(--line);border-radius:4px;overflow:hidden;margin:12px 0 6px}.bar>span{display:block;height:100%;background:var(--cyan);transition:width .5s steps(12)}.bar-pink>span{background:var(--pink)}.form-error{color:#ff8ec1;min-height:1.5em;font-weight:600}.logo{display:inline-flex;align-items:center;gap:8px;color:var(--text);text-decoration:none;font-weight:900;letter-spacing:.02em;font-size:1.1rem}.logo-star{color:var(--pink)}.home-top{display:flex;align-items:center;justify-content:space-between;padding:22px clamp(20px,5vw,64px)}.hero{display:grid;grid-template-columns:1.05fr 1fr;align-items:center;gap:24px;padding:24px clamp(20px,5vw,64px) 40px;max-width:1280px;margin:0 auto}.eyebrow{color:var(--cyan);font-weight:800;font-size:.9rem;letter-spacing:.04em;text-transform:uppercase;margin-bottom:18px}.hero-title{display:grid;font-weight:900;letter-spacing:-.03em;line-height:1;font-size:clamp(2.6rem,6.4vw,5rem)}.hero-line-white{color:var(--text)}.hero-line-pink{color:var(--pink);font-size:.82em;margin-top:10px}.hero-line-future{color:var(--pink);background:linear-gradient(90deg,#fff 0%,#ffd2e7 40%,var(--pink) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero-sub{color:#e2e5f2;max-width:30em;margin:24px 0 30px;font-size:1.1rem}.hero-actions{display:flex;flex-wrap:wrap;gap:16px}.hero-art{display:grid;place-items:center}.pixel-brain{width:min(100%,560px);height:auto;filter:drop-shadow(0 0 26px rgba(255,95,168,.28))}.brain-body{animation:brain-float 4.5s ease-in-out infinite;transform-box:fill-box}.brain-pulse{animation:dash 3.2s linear infinite}.brain-node{animation:blink 2.6s steps(2,jump-none) infinite}.topics{padding:8px clamp(20px,5vw,64px) 72px;max-width:1280px;margin:0 auto}.topics-title{font-size:1.1rem;font-weight:800;margin-bottom:18px}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.topic-card{background:var(--card);border-radius:var(--radius);padding:24px 24px 28px;border:1px solid var(--line)}.topic-card h3{font-size:1.15rem;font-weight:800;margin:14px 0 8px}.topic-card p{color:var(--muted)}.topic-dash{display:block;width:44px;height:6px}.topic-dash-pink{background:var(--pink)}.topic-dash-cyan{background:var(--cyan)}.topic-dash-yellow{background:var(--yellow)}.topics-note{margin-top:24px;color:var(--muted)}.auth-page{min-height:100vh;display:flex;flex-direction:column}.auth-main{position:relative;flex:1;display:grid;place-items:center;padding:24px 20px 64px;overflow:hidden}.auth-card{position:relative;z-index:1;width:min(440px,100%);background:#0a0b12;border:2px solid var(--pink);border-radius:14px;padding:36px 32px 32px;box-shadow:0 0 0 4px #ff5fa81f,0 0 40px #ff5fa82e;display:grid;gap:18px}.auth-card h1{font-size:2.25rem;font-weight:800;letter-spacing:-.02em}.field{display:grid;gap:8px}.field label{font-weight:700}.field input{width:100%;background:#10111a;color:var(--text);border:2px solid var(--line);border-radius:8px;padding:13px 14px;font:inherit;font-size:1rem;min-height:48px}.field input:focus{border-color:var(--cyan);outline:none;box-shadow:0 0 0 3px #67e8f94d}.hint{color:var(--muted);font-size:.9rem}.pw-wrap{position:relative}.pw-wrap input{padding-right:76px}.pw-toggle{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:none;border:0;color:var(--cyan);font-weight:700;padding:8px;cursor:pointer}.auth-switch{text-align:center;font-weight:700;color:var(--muted)}.auth-switch a{color:var(--cyan)}.plus-deco{position:absolute;width:44px;height:44px;opacity:.9;animation:brain-float 5s ease-in-out infinite}.shell{min-height:100vh;display:grid;grid-template-columns:96px 1fr;grid-template-rows:auto 1fr;grid-template-areas:"top top" "nav main"}.shell-top{grid-area:top;padding:20px 28px}.shell-nav{grid-area:nav;display:flex;flex-direction:column;align-items:center;gap:10px;padding:12px 8px;border-right:1px solid var(--line)}.shell-nav .profile-menu{margin-top:auto}.shell-main{grid-area:main;padding:8px clamp(20px,4vw,56px) 80px;min-width:0}.nav-item{display:flex;flex-direction:column;align-items:center;gap:4px;width:72px;padding:10px 4px;background:none;border:2px solid transparent;border-radius:12px;color:var(--muted);text-decoration:none;cursor:pointer;font-size:.72rem;font-weight:700}.nav-item:hover{color:var(--text)}.nav-item.active{color:var(--cyan);border-color:var(--cyan);background:#67e8f914}.nav-item svg{width:26px;height:26px}.profile-menu{position:relative}.menu-pop{position:absolute;z-index:50;background:var(--card-2);border:1px solid var(--line);border-radius:12px;padding:14px;display:grid;gap:12px;min-width:200px;box-shadow:0 12px 30px #00000080}.profile-menu-side .menu-pop{left:80px;bottom:0}.profile-menu-top .menu-pop{right:0;top:52px}.menu-name{color:var(--muted);font-size:.9rem;overflow-wrap:anywhere}.menu-name strong{color:var(--text)}.profile-menu-top .nav-item{flex-direction:row;width:auto;padding:6px 10px}.profile-menu-top .nav-label{display:none}.path-intro{margin:-8px 0 24px}.path{position:relative;width:100%;max-width:760px}.path-lines{position:absolute;left:0;top:0}.path-node{position:absolute}.lesson-box{position:absolute;right:0;min-height:84px;padding:14px 18px;display:grid;gap:2px;align-content:center;background:#05060b;border:2px solid var(--cyan);border-radius:4px;color:var(--text);text-decoration:none;box-shadow:0 0 18px #67e8f92e;transition:transform .12s ease,box-shadow .12s ease}a.lesson-box:hover{transform:translate(4px);box-shadow:0 0 26px #67e8f959}.lesson-box.is-locked{border-color:var(--grey);box-shadow:none;color:var(--muted)}.lesson-box-name{font-weight:800;font-size:1.05rem}.lesson-box-title{color:var(--muted);font-size:.92rem}.lesson-box-status{font-size:.85rem;font-weight:700;margin-top:2px}.status-open{color:var(--pink)}.status-progress{color:var(--yellow)}.status-done{color:var(--cyan)}.status-locked{color:var(--muted)}.pixel-node{position:relative;display:inline-grid;place-items:center}.pixel-node svg{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.pixel-node-pink polygon{fill:var(--pink)}.pixel-node-cyan polygon{fill:var(--cyan)}.pixel-node-grey polygon{fill:#2a2d3f}.pixel-node-label{position:relative;font-weight:900;color:#0a0510;font-size:calc(var(--s, 72px) * .42);line-height:1}.pixel-node-grey .pixel-node-label{color:var(--muted)}.pixel-node-badge{position:absolute;right:-4px;bottom:-4px;width:26px;height:26px;display:grid;place-items:center;background:#05060b;color:var(--cyan);border:2px solid var(--cyan);border-radius:4px}.pixel-node-badge-lock{color:var(--muted);border-color:var(--grey)}.lesson-page{min-height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between;padding:20px clamp(20px,5vw,56px)}.topbar-nav{display:flex;align-items:center;gap:28px}.topbar-nav a{color:var(--text);text-decoration:none;font-weight:700;padding:6px 2px;border-bottom:3px solid transparent}.topbar-nav a.active{border-bottom-color:var(--cyan)}.avatar,.avatar-btn{width:40px;height:40px;display:grid;place-items:center;background:var(--pink);color:#14040c;font-weight:900;border-radius:10px}.avatar-btn{border:0;cursor:pointer;font-size:1rem;font-family:inherit}.lesson-wrap{max-width:1120px;margin:0 auto;padding:8px clamp(20px,5vw,56px) 80px}.crumb{color:var(--cyan);font-weight:800;font-size:.85rem;letter-spacing:.04em;text-transform:uppercase;margin-bottom:6px}.lesson-title{font-size:clamp(1.9rem,4vw,3rem);font-weight:800;letter-spacing:-.02em;line-height:1.12}.lesson-sub{margin:8px 0 24px}.lesson-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:start}.lesson-main{display:grid;gap:24px}.lesson-blocks{display:grid;gap:14px;font-size:1.05rem}.lesson-blocks h3{font-size:1.2rem;font-weight:800}.lesson-blocks ul{display:grid;gap:10px;padding-left:0}.lesson-blocks li{position:relative;padding-left:22px}.lesson-blocks li:before{content:"";position:absolute;left:0;top:.6em;width:8px;height:8px;background:var(--pink)}.callout{border-left:4px solid var(--cyan);background:#11131d;padding:14px 16px;display:grid;gap:4px}.callout-tip{border-left-color:var(--yellow)}.callout strong{font-weight:800}.compare{display:grid;grid-template-columns:1fr 1fr;gap:14px}.compare>div{padding:14px 16px;border-radius:10px;display:grid;gap:6px;align-content:start}.compare span{font-weight:800;font-size:.85rem}.compare-weak{background:#231520;border:1px solid #5a2a46}.compare-weak span{color:#ff8ec1}.compare-strong{background:#10222a;border:1px solid #1f5360}.compare-strong span{color:var(--cyan)}.quiz{border:0;padding:0;margin:0;min-width:0}.quiz legend{font-size:1.3rem;font-weight:800;padding:0;margin-bottom:16px;line-height:1.3}.options{display:grid;gap:12px}.option{position:relative;display:grid;grid-template-columns:34px 1fr auto;align-items:center;gap:12px;background:var(--card-2);border:2px solid transparent;border-radius:12px;padding:14px 16px;cursor:pointer;min-height:56px;transition:border-color .12s ease,background .12s ease,transform .08s ease}.option:hover{border-color:#4a5078}.option input{position:absolute;opacity:0;top:0;right:0;bottom:0;left:0;margin:0;cursor:pointer}.option:has(input:focus-visible){outline:3px solid var(--cyan);outline-offset:3px}.option-letter{width:32px;height:32px;display:grid;place-items:center;background:#0d0e17;border-radius:6px;font-weight:800;color:var(--muted)}.option.is-picked{border-color:var(--cyan);background:#1a2a36}.option.is-picked .option-letter{background:var(--cyan);color:#031317}.option.is-right{border-color:var(--cyan);background:#123038}.option.is-right .option-letter{background:var(--cyan);color:#031317}.option.is-wrong{border-color:var(--pink);background:#3a1830;animation:shake .35s}.option.is-wrong .option-letter{background:var(--pink);color:#14040c}.option-mark{display:grid;place-items:center}.option.is-right .option-mark{color:var(--cyan)}.option.is-wrong .option-mark{color:var(--pink)}fieldset:disabled .option{cursor:default}fieldset:disabled .option:hover{border-color:transparent}fieldset:disabled .option.is-right:hover{border-color:var(--cyan)}fieldset:disabled .option.is-wrong:hover{border-color:var(--pink)}.feedback-region{margin-top:16px;display:grid;gap:10px}.feedback{border-radius:12px;padding:14px 16px;display:block}.feedback p{margin-top:6px;color:#e6e9f5}.feedback-good{background:#0f2a32;border:1px solid var(--cyan)}.feedback-good strong{color:var(--cyan)}.feedback-bad{background:#32142a;border:1px solid var(--pink)}.feedback-bad strong{color:#ff8ec1}.reward-panel{position:sticky;top:16px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px}.reward-xp{font-size:2.6rem;font-weight:900;color:var(--pink);letter-spacing:-.02em;line-height:1.1;margin-bottom:6px}.reward-note{font-size:.92rem}.reward-count{margin-top:24px;margin-bottom:0}.bar-caption{font-size:.9rem;margin-bottom:18px}.results{display:grid;gap:24px;margin-top:20px;max-width:760px}.results-card{position:relative;display:grid;gap:12px;text-align:center;justify-items:center;padding:36px 24px;overflow:hidden}.results-card h2{font-size:2rem}.big-score{font-size:4.5rem;font-weight:900;line-height:1;color:var(--pink)}.big-score span{font-size:1.6rem;color:var(--muted)}.xp-earned{display:grid;gap:4px;justify-items:center;margin-top:8px}.xp-amount{font-size:2.4rem;font-weight:900;color:var(--cyan);animation:pop .5s ease-out}.new-badges{width:100%;text-align:left;background:#11131d;border:1px solid var(--line);border-radius:12px;padding:16px;margin-top:10px}.new-badges h3{font-size:1rem;margin-bottom:10px}.new-badges ul{display:grid;gap:12px}.new-badges li{display:flex;gap:14px;align-items:center}.results-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:12px}.review-list{display:grid;gap:16px}.review-list li{display:grid;grid-template-columns:28px 1fr;gap:12px}.review-icon{width:28px;height:28px;display:grid;place-items:center;border-radius:6px}.review-ok .review-icon{background:var(--cyan);color:#031317}.review-bad .review-icon{background:var(--pink);color:#14040c}.review-q{font-weight:700}.review-why{margin-top:4px;color:#d7dbed;font-size:.95rem}.burst{position:absolute;left:50%;top:90px;width:0;height:0}.burst i{position:absolute;width:10px;height:10px;background:var(--c);animation:burst .9s ease-out forwards}.dash{display:grid;grid-template-columns:minmax(0,1fr) 120px;gap:24px;max-width:1100px}.dash-main{display:grid;gap:22px}.dash-row{display:grid;grid-template-columns:1fr 1fr;gap:22px}.stairs{width:120px;height:260px;justify-self:end;margin-top:24px}.streak-card{display:grid;grid-template-columns:auto 1fr;grid-template-areas:"node body" "week week";gap:14px 22px;align-items:center;border-radius:16px}.streak-card .pixel-node{grid-area:node}.streak-card .pixel-node-label{font-size:2.4rem}.streak-body{grid-area:body;display:grid;gap:4px}.streak-body h2{font-size:1.8rem}.week{grid-area:week;display:flex;gap:12px;flex-wrap:wrap}.week li{display:grid;justify-items:center;gap:6px}.week-letter{font-size:.8rem;font-weight:800;color:var(--muted)}.week-box{width:34px;height:34px;border-radius:8px;background:#4a4e63;display:grid;place-items:center;color:#031317}.week-box.is-done{background:var(--cyan)}.week .is-today .week-box{outline:2px solid var(--pink);outline-offset:2px}.big-number{font-size:2.6rem;font-weight:900;margin-top:6px;letter-spacing:-.02em}.big-number span{font-size:1.1rem;color:var(--muted);font-weight:700}.mini-list{display:grid;gap:8px;margin-top:10px}.mini-list li{display:flex;justify-content:space-between;gap:12px}.continue-title{font-weight:800;font-size:1.1rem;margin:10px 0 14px}.badge-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:14px;margin-top:14px}.badge{display:grid;justify-items:center;text-align:center;gap:6px;padding:14px 8px;border-radius:12px;background:#11131d;border:1px solid var(--line);opacity:.75}.badge.is-earned{opacity:1;border-color:var(--pink)}.badge-name{font-weight:800}.badge-desc{font-size:.82rem;color:var(--muted)}.recent{display:grid;gap:12px;margin-top:12px}.recent li{display:grid;grid-template-columns:1fr auto auto;gap:14px;align-items:center}.tag{font-weight:800;font-size:.85rem;padding:4px 10px;border-radius:6px}.tag-good{background:#0f2a32;color:var(--cyan)}.tag-bad{background:#32142a;color:#ff8ec1}@keyframes shimmer{to{background-position:-200% 0}}@keyframes brain-float{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}@keyframes dash{0%{stroke-dashoffset:0}to{stroke-dashoffset:-148}}@keyframes blink{0%,to{opacity:1}50%{opacity:.35}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}@keyframes pop{0%{transform:scale(.6);opacity:0}70%{transform:scale(1.12)}to{transform:scale(1);opacity:1}}@keyframes burst{0%{transform:rotate(var(--a)) translate(0);opacity:1}to{transform:rotate(var(--a)) translate(var(--d));opacity:0}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.burst{display:none}}@media (max-width: 1000px){.lesson-grid{grid-template-columns:1fr}.reward-panel{position:static}}@media (max-width: 820px){.hero{grid-template-columns:1fr}.hero-art{order:-1}.pixel-brain{width:min(100%,380px)}.topic-grid,.dash{grid-template-columns:1fr}.stairs{display:none}.dash-row,.compare{grid-template-columns:1fr}}@media (max-width: 700px){.shell{grid-template-columns:1fr;grid-template-rows:auto 1fr;grid-template-areas:"top" "main"}.shell-top{padding:14px 20px}.shell-main{padding-bottom:110px}.shell-nav{position:fixed;left:0;right:0;bottom:0;z-index:40;flex-direction:row;justify-content:space-around;background:#07080e;border-right:0;border-top:1px solid var(--line);padding:8px 8px calc(8px + env(safe-area-inset-bottom))}.shell-nav .profile-menu{margin-top:0}.profile-menu-side .menu-pop{left:auto;right:0;bottom:74px}.lesson-box{left:auto;right:0;min-height:78px;padding:10px 12px}.lesson-box-name{font-size:.98rem}.topbar-nav{gap:14px}.reward-panel{position:fixed;left:0;right:0;top:auto;bottom:0;z-index:40;border-radius:16px 16px 0 0;padding:12px 16px calc(12px + env(safe-area-inset-bottom));display:grid;grid-template-columns:1fr auto;gap:4px 14px;align-items:center}.reward-info{display:none}.reward-panel .bar,.reward-panel .bar-caption{grid-column:1;margin:0}.reward-panel .reward-btn{grid-column:2;grid-row:1 / span 2;width:auto}.lesson-wrap{padding-bottom:150px}.auth-card{padding:28px 20px}.recent li{grid-template-columns:1fr auto}.recent li .muted{grid-column:1 / -1}}