:root{--bg:#0b1020;--bg2:#111833;--card:#172044;--card2:#1f2a58;--line:#3a4a85;--text:#f1f4ff;--muted:#b4bee3;--cyan:#2ee6ff;--cyan-d:#0f9fb4;--violet:#a78bfa;--violet-d:#6d4fd6;--gold:#ffc542;--gold-d:#b8860b;--ok:#5df2a3;--danger:#ff8a98;--danger-d:#b3263a;--r:14px;--shadow-glow:0 0 22px #2ee6ff24;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;font-family:ui-rounded,Trebuchet MS,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:radial-gradient(1100px 500px at 80% -10%, #1d2a66 0%, transparent 60%), var(--bg);color:var(--text);background-attachment:fixed;min-height:100vh;margin:0;font-size:1rem;line-height:1.55;overflow-x:hidden}body.modal-open{overflow:hidden}h1,h2,h3{letter-spacing:.01em;margin:0 0 .5rem;font-weight:800;line-height:1.2}h1{font-size:1.75rem}h2{font-size:1.3rem}h3{font-size:1.1rem}p{margin:0 0 .75rem}a{color:var(--cyan);text-underline-offset:3px}.muted{color:var(--muted)}.mono{font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}:focus-visible{outline:3px solid var(--gold);outline-offset:2px;border-radius:6px}h1:focus{outline:none}.skip{background:var(--gold);color:#1a1200;z-index:100;border-radius:8px;padding:8px 12px;font-weight:800;position:absolute;top:-60px;left:8px}.skip:focus{top:8px}.wrap{width:100%;max-width:1100px;margin:0 auto;padding:0 16px}main.wrap{min-height:70vh;padding-top:20px;padding-bottom:110px}.header{z-index:30;border-bottom:2px solid var(--line);background:#0b1020;position:sticky;top:0}.header .wrap{justify-content:space-between;align-items:center;gap:12px;min-height:60px;display:flex}.brand{color:var(--text);letter-spacing:.04em;align-items:center;gap:10px;font-size:1.25rem;font-weight:900;text-decoration:none;display:flex}.brand b{color:var(--cyan)}.nav{gap:6px;display:flex}.nav a{color:var(--muted);border:2px solid #0000;border-radius:10px;align-items:center;min-height:44px;padding:10px 14px;font-weight:800;text-decoration:none;display:inline-flex}.nav a:hover{color:var(--text);background:var(--card)}.nav a[aria-current=page]{color:#04121f;background:var(--cyan);border-color:var(--cyan);box-shadow:0 3px 0 var(--cyan-d)}@media (width<=767px){.nav{z-index:40;border-top:2px solid var(--line);padding:6px 6px calc(6px + env(safe-area-inset-bottom));background:#0e1530;justify-content:space-around;gap:2px;position:fixed;bottom:0;left:0;right:0}.nav a{text-align:center;flex:1;justify-content:center;min-width:0;padding:8px 2px;font-size:.8125rem}}.menu-wrap{position:relative}.menu-btn{background:var(--card);border:2px solid var(--line);color:var(--text);min-height:44px;font:inherit;cursor:pointer;border-radius:12px;align-items:center;gap:8px;padding:4px 10px 4px 4px;font-weight:700;display:flex}.menu-btn .name{text-overflow:ellipsis;white-space:nowrap;max-width:110px;overflow:hidden}@media (width<=420px){.menu-btn .name{display:none}.menu-btn{padding-right:6px}.brand span.brand-t{font-size:1.05rem}}.menu{background:var(--card);border:2px solid var(--line);border-radius:var(--r);z-index:50;gap:2px;min-width:230px;padding:8px;display:grid;position:absolute;top:calc(100% + 8px);right:0;box-shadow:0 10px 30px #00000080}.menu a,.menu button{text-align:left;color:var(--text);font:inherit;cursor:pointer;background:0 0;border:0;border-radius:8px;width:100%;min-height:44px;padding:10px 12px;text-decoration:none;display:block}.menu a:hover,.menu button:hover{background:var(--card2)}.menu hr{border:0;border-top:1px solid var(--line);width:100%;margin:4px 0}.card{background:var(--card);border:2px solid var(--line);border-radius:var(--r);box-shadow:0 4px 0 #0a1030, var(--shadow-glow);padding:16px}.card.glow-gold{border-color:var(--gold);box-shadow:0 4px #0a1030,0 0 24px #ffc5422e}.card.glow-violet{border-color:var(--violet)}.grid{gap:14px;display:grid}.grid.cols-2{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}.grid.cols-3{grid-template-columns:repeat(auto-fit,minmax(min(100%,200px),1fr))}.stack{gap:10px;margin-bottom:12px;display:grid}.stack>*{margin:0}.row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.row.between{justify-content:space-between}.row.end{justify-content:flex-end;margin-top:12px}.page-title{margin-bottom:16px}.page-title h1{margin-bottom:4px}.section{margin-top:26px}.section>h2{margin-bottom:10px}.stat-label{letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-size:.875rem;font-weight:800}.stat-val{color:var(--gold);text-shadow:0 0 14px #ffc54259;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:2.4rem;font-weight:900;line-height:1.1}.stat-val small{color:var(--muted);text-shadow:none;font-size:1rem;font-weight:700}.hero{align-items:center;gap:14px;display:flex}.big-date{font-size:1.35rem;font-weight:900}.btn{font:inherit;letter-spacing:.02em;color:var(--text);background:var(--card2);border:3px solid var(--line);cursor:pointer;border-radius:10px;justify-content:center;align-items:center;gap:8px;min-height:46px;padding:8px 16px;font-weight:800;text-decoration:none;transition:transform 80ms,box-shadow 80ms,background .15s;display:inline-flex;box-shadow:0 4px #0a1030}.btn:hover{background:#2a3870}.btn:active:not(:disabled){transform:translateY(3px);box-shadow:0 1px #0a1030}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--cyan);color:#04121f;box-shadow:0 4px 0 var(--cyan-d);border-color:#8bf2ff}.btn-primary:hover{background:#6bf0ff}.btn-primary:active:not(:disabled){box-shadow:0 1px 0 var(--cyan-d)}.btn-gold{background:var(--gold);color:#231800;box-shadow:0 4px 0 var(--gold-d);border-color:#ffe08f}.btn-gold:hover{background:#ffd36e}.btn-gold:active:not(:disabled){box-shadow:0 1px 0 var(--gold-d)}.btn-danger{color:var(--danger);border-color:var(--danger);background:#3a1822;box-shadow:0 4px #1d0a10}.btn-ghost{box-shadow:none;border-color:var(--line);background:0 0}.btn-sm{min-height:40px;padding:4px 12px;font-size:.9375rem}.btn-xl{width:100%;min-height:64px;padding:12px 24px;font-size:1.25rem}.btn-ok{color:var(--ok);border-color:var(--ok);background:#123a2a;box-shadow:0 4px #082015}.btn-link{color:var(--cyan);font:inherit;cursor:pointer;background:0 0;border:0;min-height:40px;padding:6px 0;text-decoration:underline}.field{gap:4px;margin-bottom:12px;display:grid}label{font-weight:700}input,select,textarea{font:inherit;color:var(--text);border:2px solid var(--line);background:#0d1430;border-radius:10px;width:100%;min-height:46px;padding:10px 12px}textarea{resize:vertical}input[type=checkbox],input[type=radio]{width:24px;height:24px;min-height:0;accent-color:var(--cyan);flex:none}input:disabled,select:disabled{opacity:.6}.hint{color:var(--muted);margin:0;font-size:.9375rem}.check{border:2px solid var(--line);cursor:pointer;background:#0d1430;border-radius:10px;align-items:flex-start;gap:12px;padding:10px 12px;font-weight:600;display:flex}.check.on{border-color:var(--cyan)}.check.off{opacity:.8;cursor:default}.form-err{color:var(--danger);font-weight:700}.pill{border:2px solid var(--line);white-space:nowrap;background:#0d1430;border-radius:999px;align-items:center;gap:6px;padding:2px 10px;font-size:.875rem;font-weight:800;display:inline-flex}.pill-ok{border-color:var(--ok);color:var(--ok)}.pill-warn{border-color:var(--gold);color:var(--gold)}.pill-bad{border-color:var(--danger);color:var(--danger)}.pill-info{border-color:var(--cyan);color:var(--cyan)}.rarity{background:#0d1430;border:2px solid;border-radius:6px;align-items:center;gap:6px;padding:2px 10px;font-size:.875rem;font-weight:800;display:inline-flex}.rarity-common{color:#d7def5;border-style:solid;border-color:#8793c0}.rarity-rare{color:#5fd5ff;border:4px double #2e9ed1}.rarity-epic{color:#cdb6ff;border-style:dashed;border-color:#8f6df0}.rarity-legendary{color:var(--gold);border-color:var(--gold);box-shadow:0 0 12px #ffc54259}.avatar{border:3px solid var(--line);background:var(--bg2);border-radius:50%;flex:none;display:inline-block;overflow:hidden}.avatar svg{display:block}.frame-rare{border:4px double #5fd5ff;box-shadow:0 0 10px #5fd5ff73}.frame-epic{border:3px dashed #cdb6ff;box-shadow:0 0 12px #a78bfa99}.frame-legendary{border:4px solid var(--gold);box-shadow:0 0 16px #ffc542b3,inset 0 0 6px #ffc54280}.badge-card{gap:6px;display:grid}.badge-card.locked{opacity:.92;border-style:dashed}.badge-card.earned{border-color:var(--gold)}.badge-icon{border:2px solid var(--line);background:#0d1430;border-radius:12px;place-items:center;width:48px;height:48px;font-size:1.5rem;display:grid}.earned .badge-icon{border-color:var(--gold);color:var(--gold);box-shadow:0 0 14px #ffc54266}.badge-unlock{animation:.6s ease-out pop}@keyframes pop{0%{opacity:0;transform:scale(.6)}60%{opacity:1;transform:scale(1.12)}to{transform:scale(1)}}.progress{align-items:center;gap:10px;display:flex}.progress-track{border:2px solid var(--line);background:#0d1430;border-radius:4px;flex:1;height:14px;overflow:hidden}.progress-fill{background:repeating-linear-gradient(90deg, var(--cyan) 0 8px, #1aa9c0 8px 10px);height:100%;transition:width .5s}.progress-text{text-align:right;min-width:52px;font-family:ui-monospace,monospace;font-weight:800}.table-wrap{border-radius:10px;overflow-x:auto}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:10px}th{color:var(--muted);text-transform:uppercase;letter-spacing:.06em;white-space:nowrap;font-size:.875rem}td.num,th.num{text-align:right;font-family:ui-monospace,monospace}.list{gap:10px;margin:0;padding:0;list-style:none;display:grid}.lb-row{grid-template-columns:44px 1fr auto;align-items:center;gap:10px;padding:10px 12px;display:grid}.lb-row.me{border-color:var(--cyan);box-shadow:0 0 0 2px var(--cyan), 0 4px 0 #0a1030}.rank{text-align:center;color:var(--gold);font-family:ui-monospace,monospace;font-size:1.4rem;font-weight:900}.lb-main{align-items:center;gap:12px;min-width:0;display:flex}.lb-name{overflow-wrap:anywhere;font-weight:800}.lb-pts{text-align:right;color:var(--gold);font-family:ui-monospace,monospace;font-size:1.3rem;font-weight:900}.lb-pts small{color:var(--muted);font-size:.8125rem;font-weight:700;display:block}.lesson-card{gap:10px;display:grid}.lesson-actions{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}@media (width<=420px){.lesson-actions .btn{padding:8px 4px}}.status-line{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.tabs{flex-wrap:wrap;gap:8px;display:flex}.explain{border-left:4px solid var(--violet);background:#0d1430;border-radius:6px;padding:10px 12px}.callout{border:2px solid var(--gold);background:#ffc54214;border-radius:10px;padding:10px 12px}.callout-danger{border-color:var(--danger);background:#ff8a9814}.invite-link{word-break:break-all;border:2px dashed var(--cyan);background:#0d1430;border-radius:8px;padding:10px}.state{text-align:center;padding:28px 16px}.state-error{border-color:var(--danger)}.skeleton-wrap{gap:12px;display:grid}.skeleton{border-radius:var(--r);background:linear-gradient(90deg, var(--card) 25%, var(--card2) 50%, var(--card) 75%);border:2px solid var(--line);background-size:200% 100%;animation:1.4s linear infinite shimmer}@keyframes shimmer{to{background-position:-200% 0}}.toasts{z-index:90;pointer-events:none;justify-items:center;gap:8px;display:grid;position:fixed;bottom:84px;left:12px;right:12px}@media (width>=768px){.toasts{bottom:20px}}.toast{pointer-events:auto;background:var(--card2);border:2px solid var(--ok);border-radius:10px;max-width:520px;padding:10px 14px;font-weight:700;animation:.25s ease-out slide;box-shadow:0 8px 24px #00000080}.toast-err{border-color:var(--danger)}@keyframes slide{0%{opacity:0;transform:translateY(12px)}}.modal-backdrop{z-index:80;background:#040712bf;place-items:start center;padding:16px;display:grid;position:fixed;inset:0;overflow-y:auto}.modal{width:100%;max-width:520px;margin:4vh 0}.modal-wide{max-width:820px}.modal-head{justify-content:space-between;align-items:flex-start;gap:8px;display:flex}.auth{max-width:460px;margin:24px auto}.auth .tabs{margin-bottom:14px}.center{text-align:center}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}.btn:active:not(:disabled){transform:none}}@media (forced-colors:active){.btn,.card,input,select,textarea{border:2px solid buttontext}}.stats{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.stats .card{padding:12px}.stats .muted{margin:2px 0 0;font-size:.875rem;line-height:1.35}@media (width<=600px){.stats .stat-label{letter-spacing:.04em;font-size:.75rem}.stats .stat-val{font-size:1.9rem}.stats .stat-val small{font-size:.8rem;display:block}}