.verify-icon[data-v-8d5711ea]{width:56px;height:56px;border-radius:50%;border:1.5px solid var(--fg);display:flex;align-items:center;justify-content:center;margin:4px auto 12px}.code-boxes[data-v-8d5711ea]{display:flex;gap:8px;justify-content:center}.code-boxes input[data-v-8d5711ea]{width:46px;height:54px;text-align:center;font-size:22px;font-weight:700;font-family:var(--mono);padding:0}.link-btn[data-v-8d5711ea]:disabled{color:var(--muted);cursor:default;text-decoration:none}.footer-grid[data-v-da0d947e]{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:28px}.footer-brand .brand[data-v-da0d947e]{color:var(--fg)}.footer-brand p[data-v-da0d947e]{margin:10px 0 0;max-width:340px}.footer-title[data-v-da0d947e]{color:var(--fg);font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:1px;margin-bottom:10px}.footer-grid a[data-v-da0d947e]:not(.brand){display:block;text-decoration:none;padding:3px 0;transition:color .2s,transform .2s}.footer-grid a[data-v-da0d947e]:not(.brand):hover{color:var(--fg);transform:translate(3px)}.footer-bottom[data-v-da0d947e]{border-top:1px solid var(--line);padding-top:18px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px}.footer-credit[data-v-da0d947e]{display:inline-flex;align-items:center;gap:6px}.footer-credit a[data-v-da0d947e]{color:var(--fg);text-decoration:none}.footer-icon[data-v-da0d947e]{display:inline-flex;padding:4px;border-radius:4px}.footer-icon[data-v-da0d947e]:hover{background:var(--bg-alt)}@media (max-width: 700px){.footer-grid[data-v-da0d947e]{grid-template-columns:1fr 1fr;gap:24px}.footer-brand[data-v-da0d947e]{grid-column:1 / -1}.footer-bottom[data-v-da0d947e]{flex-direction:column;align-items:flex-start}}:root{--bg: #ffffff;--bg-alt: #f7f7f5;--fg: #111111;--fg-soft: #333333;--muted: #6b6b6b;--line: #e2e2e0;--line-strong: #c9c9c6;--code-bg: #f4f4f2;--ok: #1b7a36;--bad: #b3261e;--warn: #8a5a00;--radius: 6px;--font: Arial, Helvetica, sans-serif;--mono: Consolas, "Cascadia Mono", "Courier New", monospace;--container: 1160px;--header-h: 62px}[data-theme=dark]{--bg: #121212;--bg-alt: #191919;--fg: #ededed;--fg-soft: #cfcfcf;--muted: #9a9a9a;--line: #2a2a2a;--line-strong: #3a3a3a;--code-bg: #1c1c1c;--ok: #5cc27a;--bad: #ef7a72;--warn: #e0b250}*{box-sizing:border-box}html{scroll-behavior:smooth}html,body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit}h1,h2,h3,h4{line-height:1.25;margin:0 0 12px;letter-spacing:-.01em}h1{font-size:30px}h2{font-size:22px}h3{font-size:18px}p{margin:0 0 12px}code,pre,textarea.code{font-family:var(--mono)}::selection{background:var(--fg);color:var(--bg)}.container{max-width:var(--container);margin:0 auto;padding:0 24px}.container-narrow{max-width:780px;margin:0 auto;padding:0 24px}.site-header{position:sticky;top:0;z-index:40;height:var(--header-h);background:color-mix(in srgb,var(--bg) 92%,transparent);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}.header-inner{height:100%;display:flex;align-items:center;gap:28px}.brand{display:inline-flex;align-items:center;gap:8px;text-decoration:none;flex-shrink:0}.brand-name{font-size:21px;font-weight:700;letter-spacing:.3px}.brand-tag{border:1.5px solid var(--fg);padding:0 6px;font-size:12px;font-weight:700;line-height:18px}.nav-main{display:flex;align-items:center;gap:4px;flex:1}.nav-link{padding:7px 12px;text-decoration:none;color:var(--muted);border-radius:var(--radius);font-size:15px}.nav-link:hover{color:var(--fg);background:var(--bg-alt)}.nav-link.active{color:var(--fg);font-weight:700}.nav-right{display:flex;align-items:center;gap:8px}.icon-btn{width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);background:var(--bg);color:var(--fg);border-radius:var(--radius);cursor:pointer}.icon-btn:hover{border-color:var(--fg)}.menu-toggle{display:none}.user-menu{position:relative}.user-btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--bg);color:var(--fg);padding:4px 10px 4px 4px;border-radius:999px;cursor:pointer;font:inherit;font-size:14px}.user-btn:hover{border-color:var(--fg)}.avatar{width:28px;height:28px;border-radius:50%;background:var(--fg);color:var(--bg);display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}.dropdown{position:absolute;right:0;top:calc(100% + 8px);min-width:200px;background:var(--bg);border:1px solid var(--line-strong);border-radius:var(--radius);padding:6px;box-shadow:0 8px 24px #00000014}.dropdown a,.dropdown button{display:block;width:100%;text-align:left;padding:8px 10px;border:none;background:none;color:var(--fg);font:inherit;font-size:14px;text-decoration:none;border-radius:4px;cursor:pointer}.dropdown a:hover,.dropdown button:hover{background:var(--bg-alt)}.dropdown-head{padding:8px 10px;border-bottom:1px solid var(--line);margin-bottom:4px;font-size:13px;color:var(--muted)}.dropdown-head strong{display:block;color:var(--fg);font-size:14px}.mobile-nav{display:none}@media (max-width: 900px){.nav-main,.nav-right .hide-sm{display:none}.menu-toggle{display:inline-flex}.header-inner{justify-content:space-between}.mobile-nav{display:block;position:fixed;top:var(--header-h);left:0;right:0;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 16px 16px;z-index:39}.mobile-nav a{display:block;padding:11px 6px;border-bottom:1px solid var(--line);text-decoration:none}.mobile-nav a.active{font-weight:700}.mobile-nav .row{margin-top:12px}}.site-footer{border-top:1px solid var(--line);margin-top:80px;padding:44px 0 26px;color:var(--muted);font-size:14px;background:var(--bg-alt)}.footer-inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.footer-links{display:flex;gap:18px;flex-wrap:wrap}.footer-links a{text-decoration:none}.footer-links a:hover{color:var(--fg)}.page{padding-top:40px}.page-head{margin-bottom:28px}.page-head h1{margin-bottom:6px}.page-head p{color:var(--muted);margin:0;max-width:680px}.eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:1.5px;color:var(--muted);font-weight:700;margin-bottom:8px}.section{padding:56px 0 0}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:20px;flex-wrap:wrap}.section-head h2{margin:0}.muted{color:var(--muted)}.small{font-size:14px}.xs{font-size:12px}.row{display:flex;align-items:center;flex-wrap:wrap}.gap-sm{gap:8px}.gap{gap:14px}.between{justify-content:space-between}.mt{margin-top:16px}.mt-lg{margin-top:32px}.mb{margin-bottom:16px}.grid{display:grid;gap:16px}.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.grid-3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.grid-4{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}.ok{color:var(--ok)}.bad{color:var(--bad)}.nowrap{white-space:nowrap}.card{border:1px solid var(--line);border-radius:var(--radius);padding:20px;background:var(--bg)}.card-alt{background:var(--bg-alt)}.card-link{text-decoration:none;display:block;transition:border-color .15s}.card-link:hover{border-color:var(--fg)}.stat{border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}.stat-value{font-size:26px;font-weight:700;line-height:1.2}.stat-label{color:var(--muted);font-size:13px;margin-top:2px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 16px;border:1px solid var(--line-strong);background:var(--bg);color:var(--fg);font:inherit;font-size:15px;cursor:pointer;text-decoration:none;line-height:1.3;border-radius:var(--radius);transition:border-color .15s,background .15s}.btn:hover{border-color:var(--fg)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--fg);color:var(--bg);border-color:var(--fg)}.btn-primary:hover{opacity:.88}.btn-ghost{border-color:transparent}.btn-danger{border-color:var(--bad);color:var(--bad)}.btn-sm{padding:5px 11px;font-size:14px}.btn-lg{padding:12px 22px;font-size:16px}.btn-block{width:100%}input,select,textarea{font:inherit;color:var(--fg);background:var(--bg);border:1px solid var(--line-strong);border-radius:var(--radius);padding:9px 11px;width:100%}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--fg);box-shadow:0 0 0 3px color-mix(in srgb,var(--fg) 10%,transparent)}input[type=checkbox],input[type=radio]{width:auto;box-shadow:none}label{display:block;font-size:14px;margin-bottom:5px;color:var(--fg-soft);font-weight:700}.field{margin-bottom:16px}.alert{border:1px solid var(--line);border-left:4px solid var(--fg);border-radius:var(--radius);padding:12px 16px;margin-bottom:16px;background:var(--bg-alt)}.alert-error{border-left-color:var(--bad)}.alert-ok{border-left-color:var(--ok)}.progress{height:6px;background:var(--line);border-radius:999px;overflow:hidden}.progress>div{height:100%;background:var(--fg);border-radius:999px;transition:width .3s}.badge{display:inline-block;border:1px solid var(--line-strong);border-radius:999px;padding:1px 10px;font-size:12px;color:var(--muted);white-space:nowrap}.badge-dark{border-color:var(--fg);background:var(--fg);color:var(--bg)}.badge-ok{border-color:var(--ok);color:var(--ok)}.tabs{display:flex;flex-wrap:wrap;gap:4px;border-bottom:1px solid var(--line);margin-bottom:20px}.tab{padding:9px 14px;border:none;border-bottom:2px solid transparent;margin-bottom:-1px;background:none;color:var(--muted);cursor:pointer;font:inherit;font-size:15px;text-decoration:none}.tab:hover{color:var(--fg)}.tab.active{color:var(--fg);border-bottom-color:var(--fg);font-weight:700}.segmented{display:inline-flex;border:1px solid var(--line-strong);border-radius:var(--radius);overflow:hidden}.segmented button{border:none;background:var(--bg);color:var(--muted);padding:7px 14px;font:inherit;font-size:14px;cursor:pointer}.segmented button+button{border-left:1px solid var(--line-strong)}.segmented button.active{background:var(--fg);color:var(--bg)}table{width:100%;border-collapse:collapse;font-size:15px}th,td{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}th{font-size:13px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.5px}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius)}.table-wrap table tr:last-child td{border-bottom:none}.empty{border:1px dashed var(--line-strong);border-radius:var(--radius);padding:28px;text-align:center;color:var(--muted)}.hero{padding:64px 0 24px;display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center}.hero h1{font-size:44px;line-height:1.12;letter-spacing:-.02em;margin-bottom:18px}.hero p.lead{font-size:18px;color:var(--fg-soft);margin-bottom:26px;max-width:520px}.window{border:1px solid var(--line-strong);border-radius:8px;overflow:hidden;background:var(--code-bg)}.window-bar{display:flex;align-items:center;gap:6px;padding:10px 12px;border-bottom:1px solid var(--line);background:var(--bg);font-size:12px;color:var(--muted)}.window-bar i{width:10px;height:10px;border-radius:50%;border:1px solid var(--line-strong);display:inline-block}.window-bar span{margin-left:8px}.window pre{margin:0;padding:18px;font-size:14px;line-height:1.6;overflow-x:auto}.window .out{border-top:1px solid var(--line);padding:12px 18px;font-family:var(--mono);font-size:13px;color:var(--muted);background:var(--bg)}.strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--radius);margin-top:40px}.strip>div{padding:18px 20px}.strip>div+div{border-left:1px solid var(--line)}.steps{counter-reset:step}.step{position:relative;padding-left:48px}.step:before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:32px;height:32px;border:1.5px solid var(--fg);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}.level-card{display:flex;flex-direction:column;gap:10px;height:100%}.level-card .row{flex-wrap:nowrap;gap:8px;align-items:flex-start}.level-num{font-size:13px;color:var(--muted);font-weight:700;letter-spacing:1px;text-transform:uppercase}.continue{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}@media (max-width: 900px){.hero{grid-template-columns:1fr;padding-top:36px;gap:28px}.hero h1{font-size:32px}.strip{grid-template-columns:repeat(2,1fr)}.strip>div:nth-child(3){border-left:none}.strip>div:nth-child(n+3){border-top:1px solid var(--line)}}.module-block{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:16px;overflow:hidden}.module-head{display:flex;gap:16px;align-items:flex-start;justify-content:space-between;padding:18px 20px;cursor:pointer;background:var(--bg);border:none;width:100%;text-align:left;font:inherit;color:inherit}.module-head:hover{background:var(--bg-alt)}.module-body{border-top:1px solid var(--line)}.lesson-list{list-style:none;padding:0;margin:0}.lesson-list li+li{border-top:1px solid var(--line)}.lesson-list a{display:flex;gap:12px;align-items:center;padding:11px 20px;text-decoration:none}.lesson-list a:hover{background:var(--bg-alt)}.lesson-no{width:34px;color:var(--muted);font-size:13px;font-family:var(--mono);flex-shrink:0}.check{width:18px;height:18px;border:1.5px solid var(--line-strong);border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:11px;flex-shrink:0;margin-left:auto}.check.done{background:var(--fg);border-color:var(--fg);color:var(--bg)}.lesson-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:48px;align-items:start}.toc{position:sticky;top:calc(var(--header-h) + 24px);max-height:calc(100vh - var(--header-h) - 48px);overflow-y:auto;font-size:14px}.toc-title{font-weight:700;margin-bottom:4px}.toc a{display:flex;gap:8px;padding:6px 10px;text-decoration:none;color:var(--muted);border-left:2px solid var(--line)}.toc a:hover{color:var(--fg)}.toc a.active{color:var(--fg);border-left-color:var(--fg);font-weight:700}.toc a .check{width:14px;height:14px;font-size:9px;margin-left:auto}.lesson-main{max-width:760px;min-width:0}.lesson-layout>*{min-width:0}.crumb{font-size:14px;color:var(--muted);margin-bottom:10px}.crumb a{text-decoration:none}.crumb a:hover{color:var(--fg)}.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}.pager a{border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;text-decoration:none}.pager a:hover{border-color:var(--fg)}.pager .next{text-align:right;grid-column:2}@media (max-width: 900px){.lesson-layout{grid-template-columns:minmax(0,1fr);gap:20px}.toc{position:static;max-height:none}.toc-list{display:none}.toc.open .toc-list{display:block}}.prose{line-height:1.75;font-size:16.5px}.prose h2{margin-top:32px}.prose h3{margin-top:34px;font-size:19px}.prose ul,.prose ol{padding-left:22px;margin:0 0 16px}.prose li{margin-bottom:4px}.prose code{background:var(--code-bg);border:1px solid var(--line);border-radius:4px;padding:1px 5px;font-size:14px}.prose pre{background:var(--code-bg);padding:16px;overflow-x:auto;margin:0;font-size:14px;line-height:1.6}.prose pre code{background:none;border:none;padding:0;font-size:14px}.prose table{margin:0;font-size:15px}.prose .table-wrap{margin:0 0 18px}.prose blockquote{border-left:3px solid var(--fg);margin:0 0 16px;padding:4px 16px;color:var(--muted)}.code-block{margin:0 0 18px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.code-bar{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:5px 8px 5px 14px;font-size:12px;color:var(--muted);background:var(--bg);min-height:38px}.code-bar .btn{font-size:13px;padding:4px 10px}.editor{width:100%;min-height:260px;resize:vertical;font-family:var(--mono);font-size:14px;line-height:1.6;-moz-tab-size:2;tab-size:2;white-space:pre;background:var(--code-bg);padding:14px;border-radius:var(--radius)}.console{border:1px solid var(--line);border-radius:var(--radius);background:var(--code-bg);font-family:var(--mono);font-size:14px;min-height:80px;max-height:380px;overflow:auto;padding:10px 14px}.console-line{white-space:pre-wrap;word-break:break-word;padding:2px 0;border-bottom:1px dotted var(--line)}.console-line:last-child{border-bottom:none}.console-line.info{color:var(--muted)}.console-line.warn{color:var(--warn)}.console-line.error{color:var(--bad)}.preview-frame{width:100%;height:360px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;display:block}.pg-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;align-items:start}.pg-pane-title{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px;min-height:30px}.pg-pane-title .btn{font-weight:400;text-transform:none;letter-spacing:0}@media (max-width: 960px){.pg-layout{grid-template-columns:1fr}}.question{white-space:pre-wrap;margin-bottom:14px;font-size:16px}.option{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);border-radius:var(--radius);padding:11px 14px;margin-bottom:8px;cursor:pointer;font-weight:400;color:var(--fg);font-size:15px}.option:hover{border-color:var(--line-strong);background:var(--bg-alt)}.option.selected{border-color:var(--fg)}.option.correct{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 6%,transparent)}.option.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 6%,transparent)}.option input{margin-top:4px}.q-head{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:12px;flex-wrap:wrap}.q-num{font-size:13px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}.side-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:32px;align-items:start}.side-list{position:sticky;top:calc(var(--header-h) + 24px)}.side-list button{display:block;width:100%;text-align:left;border:none;border-left:2px solid var(--line);background:none;padding:8px 12px;font:inherit;font-size:14px;color:var(--muted);cursor:pointer}.side-list button:hover{color:var(--fg)}.side-list button.active{border-left-color:var(--fg);color:var(--fg);font-weight:700}.side-list .xs{display:block;font-weight:400}@media (max-width: 900px){.side-layout{grid-template-columns:1fr}.side-list{position:static;display:flex;overflow-x:auto;gap:6px;padding-bottom:6px}.side-list button{border:1px solid var(--line);border-radius:999px;white-space:nowrap;width:auto}.side-list button.active{border-color:var(--fg)}.side-list .xs{display:none}}.auth-wrap{max-width:420px;margin:56px auto 0;padding:0 20px}.auth-wrap h1{margin-bottom:6px}.admin-shell{min-height:100vh;background:var(--bg-alt)}.admin-layout{display:flex;min-height:100vh;background:var(--bg-alt)}.admin-sidebar{width:248px;flex-shrink:0;background:var(--bg);border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;padding:18px 14px}.admin-brand{padding:4px 8px 18px;border-bottom:1px solid var(--line);margin-bottom:14px}.admin-menu{display:flex;flex-direction:column;gap:2px;flex:1;overflow-y:auto}.admin-menu-label{font-size:11px;text-transform:uppercase;letter-spacing:1.2px;color:var(--muted);font-weight:700;padding:14px 10px 6px}.admin-menu a,.admin-menu button{display:flex;align-items:center;gap:11px;padding:9px 10px;border-radius:var(--radius);text-decoration:none;color:var(--muted);font:inherit;font-size:15px;background:none;border:none;cursor:pointer;text-align:left;width:100%}.admin-menu a:hover,.admin-menu button:hover{background:var(--bg-alt);color:var(--fg)}.admin-menu a.active{background:var(--fg);color:var(--bg);font-weight:700}.admin-user{display:flex;align-items:center;gap:10px;border-top:1px solid var(--line);padding-top:14px;font-size:14px}.truncate{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.admin-content{flex:1;min-width:0}.admin-topbar{height:62px;display:flex;align-items:center;gap:12px;padding:0 28px;background:var(--bg);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.admin-topbar h1{font-size:19px;margin:0}.admin-toggle{display:none}.admin-body{padding:28px;max-width:1180px}.admin-body .card{background:var(--bg)}.admin-backdrop{display:none}@media (max-width: 900px){.admin-sidebar{position:fixed;left:0;z-index:50;transform:translate(-100%);transition:transform .2s}.nav-open .admin-sidebar{transform:none}.nav-open .admin-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;z-index:45}.admin-toggle{display:inline-flex}.admin-topbar{padding:0 16px}.admin-body{padding:18px 16px}}.actions{display:flex;gap:4px;flex-wrap:wrap}.actions .icon-btn{width:32px;height:32px}.icon-btn.danger{color:var(--bad)}.icon-btn.danger:hover{border-color:var(--bad)}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;background:#00000073;display:flex;align-items:center;justify-content:center;padding:20px;animation:fade .15s ease-out}.modal{width:100%;max-width:420px;max-height:calc(100vh - 40px);overflow-y:auto;background:var(--bg);border:1px solid var(--line-strong);border-radius:10px;padding:26px;box-shadow:0 20px 50px #0003;position:relative;animation:pop .18s ease-out}.modal-lg{max-width:560px}.modal-close{position:absolute;top:14px;right:14px}.modal h2{margin-bottom:4px}.modal-sub{color:var(--muted);font-size:14px;margin-bottom:18px}.modal-switch{text-align:center;font-size:14px;margin-top:16px;color:var(--muted)}.link-btn{background:none;border:none;padding:0;font:inherit;color:var(--fg);font-weight:700;cursor:pointer;text-decoration:underline}@keyframes fade{0%{opacity:0}}@keyframes pop{0%{opacity:0;transform:translateY(8px) scale(.98)}}.auth-btns{display:flex;gap:6px}.auth-btns .btn{gap:7px}@media (max-width: 520px){.auth-btns .btn span{display:none}.auth-btns .btn{padding:8px}}@media print{.no-print,.site-header,.site-footer{display:none!important}}.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.2,1)}.reveal.is-visible{opacity:1;transform:none}.page-enter-active,.page-leave-active{transition:opacity .22s ease,transform .22s ease}.page-enter-from{opacity:0;transform:translateY(10px)}.page-leave-to{opacity:0;transform:translateY(-6px)}.hero>*{animation:rise .7s cubic-bezier(.2,.7,.2,1) both}.hero>*:nth-child(2){animation-delay:.15s}.hero h1{animation:rise .7s .05s cubic-bezier(.2,.7,.2,1) both}@keyframes rise{0%{opacity:0;transform:translateY(22px)}}.window{transition:transform .35s ease,box-shadow .35s ease}.window:hover{transform:translateY(-4px);box-shadow:0 18px 40px #00000014}.window pre{white-space:pre-wrap;word-break:break-word}.window .out span{display:block;opacity:0;animation:type-in .4s ease forwards}.window .out span:nth-child(1){animation-delay:.9s}.window .out span:nth-child(2){animation-delay:1.3s}.window .out .cursor{display:inline-block;width:8px;height:14px;background:currentColor;vertical-align:-2px;margin-left:4px;animation:blink 1s steps(1) infinite;opacity:1}@keyframes type-in{0%{opacity:0;transform:translate(-6px)}to{opacity:1;transform:none}}@keyframes blink{50%{opacity:0}}.card-link{transition:border-color .2s,transform .25s ease,box-shadow .25s ease}.card-link:hover{transform:translateY(-3px);box-shadow:0 10px 24px #0000000f}.btn{transition:border-color .15s,background .15s,transform .15s,opacity .15s}.btn:active:not(:disabled){transform:scale(.97)}.btn-primary:hover{transform:translateY(-1px)}.nav-link{position:relative;transition:color .2s,background .2s}.nav-link:after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--fg);transform:scaleX(0);transition:transform .25s ease}.nav-link.active:after,.nav-link:hover:after{transform:scaleX(1)}.nav-link:hover{background:none}.step:before{transition:background .25s,color .25s}.step:hover:before{background:var(--fg);color:var(--bg)}.stat,.strip>div{transition:transform .25s ease}.strip>div:hover{transform:translateY(-2px)}.module-body{animation:drop .25s ease}@keyframes drop{0%{opacity:0;transform:translateY(-6px)}}.dropdown{animation:drop .15s ease;transform-origin:top right}.mobile-nav{animation:drop .2s ease}.progress>div{transition:width .8s cubic-bezier(.2,.7,.2,1)}.option{transition:border-color .15s,background .15s,transform .15s}.option:hover{transform:translate(2px)}.scroll-top{position:fixed;right:22px;bottom:22px;z-index:60;width:50px;height:50px;border-radius:50%;border:1px solid var(--line-strong);background:var(--bg);color:var(--fg);cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px #0000001f;transition:transform .2s,background .2s,color .2s}.scroll-top:hover{transform:translateY(-3px);background:var(--fg);color:var(--bg)}.scroll-ring{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.pop-enter-active,.pop-leave-active{transition:opacity .25s,transform .25s}.pop-enter-from,.pop-leave-to{opacity:0;transform:translateY(12px) scale(.85)}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-delay:0ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}.reveal{opacity:1;transform:none}}.level-card .row .xs{white-space:nowrap}.card-link.row{display:flex;align-items:flex-start;flex-wrap:nowrap}@media (max-width: 900px){.page{padding-top:28px}.section{padding-top:44px}.page-head{margin-bottom:22px}.side-layout{gap:18px}}@media (max-width: 640px){html,body{font-size:15px}.container,.container-narrow{padding:0 16px}h1{font-size:25px}h2{font-size:20px}.hero{padding-top:28px}.hero h1{font-size:29px}.hero p.lead{font-size:16px}.hero .btn-lg{flex:1}.window pre{font-size:12.5px;padding:14px}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.stat{padding:12px 14px}.stat-value{font-size:21px}.strip{margin-top:28px}.strip>div{padding:14px}.strip .stat-value{font-size:19px}.steps.grid-4{grid-template-columns:1fr;gap:18px}.card{padding:16px}.module-head{padding:14px 16px}.module-head h2{font-size:18px!important}.lesson-list a{padding:11px 16px}.continue .btn{width:100%}.prose{font-size:15.5px}.prose pre,.prose pre code{font-size:13px}.prose h3{font-size:17.5px;margin-top:28px}.code-bar .btn{font-size:12px;padding:4px 8px}.pager{grid-template-columns:1fr}.pager .next{grid-column:auto}.editor{min-height:240px!important;font-size:13px}.preview-frame{height:300px}.page-head.row{align-items:flex-start!important}.option{padding:10px 12px}.question{font-size:15px}.modal-backdrop{align-items:flex-end;padding:0}.modal{max-width:none;border-radius:14px 14px 0 0;padding:22px 18px 26px;max-height:92vh;animation:sheet .25s ease-out}.modal-lg{max-width:none}.scroll-top{width:44px;height:44px;right:14px;bottom:14px}.site-footer{margin-top:56px}.admin-body{padding:16px 12px}.admin-topbar h1{font-size:17px}}@keyframes sheet{0%{transform:translateY(40px);opacity:0}}.code-boxes input{flex:1 1 0;min-width:0;max-width:46px}@media (max-width: 700px){.table-wrap.stack{border:none;overflow:visible;background:none!important}.table-wrap.stack table,.table-wrap.stack tbody,.table-wrap.stack tr,.table-wrap.stack td{display:block;width:100%}.table-wrap.stack thead{display:none}.table-wrap.stack tr{border:1px solid var(--line);border-radius:var(--radius);background:var(--bg);padding:6px 14px;margin-bottom:10px}.table-wrap.stack td{border:none;padding:6px 0;display:flex;gap:12px;justify-content:space-between;align-items:center;text-align:right}.table-wrap.stack td:before{content:attr(data-label);font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;text-align:left;flex-shrink:0}.table-wrap.stack td[data-label=""]{justify-content:flex-start;text-align:left}.table-wrap.stack td[data-label=""]:before{display:none}.table-wrap.stack td.row{display:flex}}