:root{--y:#ffe21a;--yr:255,226,26;--y-dim:rgba(var(--yr),.14);--bg:#000;--panel:#0e0e0e;--line:#262626;--text:#f5f5f0;--muted:#9b9b94;--display:'Bricolage Grotesque','Inter',system-ui,sans-serif;--body:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 var(--body);-webkit-font-smoothing:antialiased;overflow-x:hidden;padding-bottom:env(safe-area-inset-bottom,0px)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--y);outline-offset:3px;border-radius:6px}
::selection{background:var(--y);color:#000}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
section{padding:84px 0}
.progress{position:fixed;inset:0 0 auto 0;height:3px;z-index:60;background:var(--y);transform:scaleX(0);transform-origin:0 50%;pointer-events:none}

/* nav */
.nav-wrap{position:fixed;inset:0 0 auto 0;z-index:50;display:flex;justify-content:center;padding:calc(14px + env(safe-area-inset-top,0px)) 14px 0;pointer-events:none}
.nav{pointer-events:auto;position:relative;display:flex;align-items:center;gap:28px;padding:7px 8px 7px 14px;background:rgba(10,10,10,.82);border:1px solid var(--line);border-radius:999px;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:0 12px 40px -10px rgba(var(--yr),.18)}
.brand{display:flex;align-items:center;gap:10px;font:800 18px var(--display)}
.brand img{width:36px;height:36px;border-radius:50%;object-fit:cover;border:2px solid var(--y)}
.nav nav{display:flex;align-items:center;gap:4px}
.nb{padding:9px 18px;border-radius:999px;font-size:14.5px;font-weight:500;color:var(--muted);transition:background .2s,color .2s}
.nb:hover{color:var(--text);background:#1c1c1c}
.nb.active{color:#000;background:var(--y);font-weight:600}
.nb-hot{margin-left:6px;color:var(--y);border:1.5px solid var(--y);font-weight:600}
.nb-hot:hover{background:var(--y);color:#000}
.burger{display:none}

/* hero */
.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:56px;align-items:center;padding-top:170px;padding-bottom:90px}
.open{display:inline-flex;align-items:center;gap:9px;margin-bottom:26px;padding:7px 14px;border:1px solid var(--line);border-radius:999px;font-size:13.5px;color:var(--muted)}
.open i{width:8px;height:8px;border-radius:50%;background:var(--y);animation:ping 2s infinite}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(var(--yr),.6)}70%,100%{box-shadow:0 0 0 9px rgba(var(--yr),0)}}
h1{margin:0;font:800 clamp(40px,6.2vw,76px)/1.03 var(--display);letter-spacing:-.035em}
.nf .code{display:block;font:800 clamp(88px,18vw,190px)/.9 var(--display);letter-spacing:-.05em;color:var(--y)}
.nf h1{margin-top:12px;font-size:clamp(30px,4.6vw,52px)}
.nfrow{display:flex;align-items:center;flex-wrap:wrap;gap:6px clamp(10px,3vw,28px)}
.walrus-big{height:clamp(150px,28vw,330px);width:auto;max-width:100%;filter:drop-shadow(0 10px 24px rgba(0,0,0,.55));animation:bob 3.2s ease-in-out infinite;user-select:none;-webkit-user-select:none}
@keyframes bob{50%{transform:translateY(-6px) rotate(-2deg)}}
.lead{margin:20px 0 0;max-width:52ch;font-size:18px;color:var(--muted);border-left:3px solid var(--y);padding-left:16px}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.btn{display:inline-flex;align-items:center;padding:13px 24px;border-radius:12px;background:var(--y);color:#000;font-weight:600;font-size:15px;border:0;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 28px -8px rgba(var(--yr),.5)}
.btn.ghost{background:transparent;color:var(--text);border:1.5px solid var(--line)}
.btn.ghost:hover{border-color:var(--y);color:var(--y);box-shadow:none}
.status-card{position:relative;padding:26px;background:var(--y);color:#000;border-radius:20px;box-shadow:8px 8px 0 color-mix(in srgb,var(--y) 16%,#000)}
.status-card h2{margin:0 0 4px;font:800 22px var(--display)}
.status-card>p{margin:0 0 14px;font-size:14px;opacity:.75}
.srow{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0;border-top:1.5px solid rgba(0,0,0,.18);font-weight:600}
.srow small{display:block;font-weight:500;font-size:13px;opacity:.65}
.status-card .spinhint{margin:12px 0 0;padding-top:12px;border-top:1.5px solid rgba(0,0,0,.18);font-size:12.5px;font-weight:600;opacity:.7}
.switch{position:relative;flex:none;width:54px;height:30px;padding:0;border:0;border-radius:999px;background:#000;cursor:pointer}
.switch i{position:absolute;top:4px;left:4px;width:22px;height:22px;border-radius:50%;background:#77776e;transition:transform .2s,background .2s}
.switch[aria-checked=true] i{transform:translateX(24px);background:var(--y)}

/* section headings */
.h2{margin:0;font:800 clamp(30px,4.4vw,46px)/1.1 var(--display);letter-spacing:-.025em}
.h2::after{content:"";display:block;width:56px;height:5px;margin-top:14px;background:var(--y);border-radius:3px}
.sub{margin:16px 0 36px;color:var(--muted);max-width:56ch}

/* tool panels */
.tool{background:var(--panel);border:1px solid var(--line);border-radius:20px;overflow:hidden}
.tabs{display:flex;gap:6px;padding:10px;border-bottom:1px solid var(--line);overflow-x:auto}
.tabs button{padding:9px 18px;border:0;border-radius:999px;background:transparent;color:var(--muted);font-size:14.5px;font-weight:500;cursor:pointer;white-space:nowrap;transition:background .2s,color .2s}
.tabs button:hover{color:var(--text);background:#1c1c1c}
.tabs button[aria-selected=true]{background:var(--y);color:#000;font-weight:600}
.panel{padding:24px}
.panel[hidden]{display:none}
.panel label{display:block;margin:0 0 8px;font-size:13.5px;color:var(--muted)}
.panel label+.outrow,.panel textarea+label{margin-top:18px}
textarea{width:100%;resize:vertical;padding:12px 14px;background:#0a0a0a;color:var(--text);border:1px solid var(--line);border-radius:12px;font:15px/1.5 var(--body)}
textarea:focus{border-color:var(--y);outline:0}
.outrow{display:flex;align-items:stretch;gap:8px}
.mono{flex:1;min-width:0;display:block;padding:12px 14px;background:#0a0a0a;border:1px solid var(--line);border-radius:12px;font:14px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;word-break:break-all;color:var(--y)}
.mini{padding:0 16px;border:1.5px solid var(--line);border-radius:12px;background:transparent;color:var(--text);font-weight:600;font-size:14px;cursor:pointer;transition:border-color .2s,color .2s}
.mini:hover{border-color:var(--y);color:var(--y)}
.mini.big{padding:11px 22px}
.popts{display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px;margin-top:18px}
.popts label{margin:0}
.rng{display:flex!important;align-items:center;gap:10px;flex:1 1 240px}
.rng b{min-width:2ch;color:var(--text)}
.rng input{flex:1;accent-color:var(--y)}
.chk{display:flex!important;align-items:center;gap:7px;cursor:pointer}
.chk input{accent-color:var(--y);width:16px;height:16px}
.pstr{margin:14px 0 0;font-size:13px;color:var(--muted)}

/* calculator */
.calcwrap{display:grid;grid-template-columns:minmax(0,360px) 1fr;gap:28px;align-items:start}
.calc{padding:14px;background:#0a0a0a;border:1px solid var(--line);border-radius:18px}
.calc:focus-visible{outline-offset:4px}
.cdisp{min-height:92px;padding:10px 12px 14px;text-align:right;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden}
#cres{min-height:1.4em;font-size:15px;color:var(--muted)}
#cexpr{font:800 34px/1.15 var(--display);word-break:break-all}
.ckeys{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.ckeys button{height:52px;border:0;border-radius:12px;background:#1a1a1a;color:var(--text);font:600 18px var(--body);cursor:pointer;transition:transform .08s,background .15s}
.ckeys button:hover{background:#242424}
.ckeys button:active{transform:scale(.94)}
.ckeys .fn{color:var(--y);background:#141414}
.ckeys .op{background:rgba(var(--yr),.16);color:var(--y)}
.ckeys .eq{background:var(--y);color:#000}
.histbox h3{margin:4px 0 10px;font:800 17px var(--display);color:var(--y)}
.hist{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.hist li{padding:10px 14px;background:#121212;border:1px solid var(--line);border-radius:12px;font-size:14px;color:var(--muted);cursor:pointer}
.hist li:hover{border-color:var(--y)}
.hist li b{display:block;color:var(--text);font-size:17px}
.hist li.empty{cursor:default;border-style:dashed}
.hist li.empty:hover{border-color:var(--line)}

/* arcade */
.gwrap{display:grid;grid-template-columns:minmax(0,320px) 1fr;gap:28px;align-items:start}
.gside{display:flex;flex-direction:column;align-items:flex-start;gap:14px;min-width:0}
.gstat{margin:0;font:700 17px var(--display);color:var(--text)}
.hint{margin:0;font-size:13px;color:var(--muted);max-width:34ch}
.seg{display:inline-flex;flex-wrap:wrap;gap:4px;padding:4px;background:#0a0a0a;border:1px solid var(--line);border-radius:999px}
.seg button{padding:7px 14px;border:0;border-radius:999px;background:transparent;color:var(--muted);font-size:13.5px;font-weight:600;cursor:pointer}
.seg button:hover{color:var(--text)}
.seg button[aria-pressed=true]{background:var(--y);color:#000}
.score{display:flex;flex-wrap:wrap;gap:10px}
.score span{display:flex;flex-direction:column;align-items:center;min-width:74px;padding:8px 12px;background:#141414;border:1px solid var(--line);border-radius:12px}
.score b{font:800 24px/1.1 var(--display)}
.score i{font-style:normal;font-size:12px;color:var(--muted)}
.ttt{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;width:min(100%,300px)}
.cell{aspect-ratio:1;width:100%;border:0;border-radius:14px;background:#161616;color:var(--text);font:800 clamp(30px,9vw,46px)/1 var(--display);cursor:pointer;transition:background .15s,transform .08s}
.cell:hover{background:#212121}
.cell:active{transform:scale(.95)}
.cell[data-m=X]{color:var(--y)}
.cell[data-m=O]{color:#fff}
.cell.win,.cell.win:hover{background:var(--y);color:#000}
.mem{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;width:min(100%,320px)}
.mc{aspect-ratio:1;width:100%;border:0;border-radius:12px;background:#161616;color:var(--muted);font:700 26px/1 var(--display);cursor:pointer;transition:background .15s,transform .08s}
.mc:hover{background:#212121}
.mc:active{transform:scale(.95)}
.mc.up{background:#222;color:var(--text)}
.mc.done{background:rgba(var(--yr),.2);color:var(--text);cursor:default}
.rarea{display:block;width:100%;min-height:200px;border:0;border-radius:16px;background:#161616;color:var(--text);font:800 clamp(20px,4vw,28px) var(--display);cursor:pointer;user-select:none;-webkit-user-select:none;touch-action:manipulation}
.rarea.wait{background:#3a1414;color:#fca5a5}
.rarea.go{background:var(--y);color:#000}
#p-react .gstat{margin-top:14px;font-size:15px;font-weight:600;color:var(--muted)}
#sc{display:block;width:min(100%,300px);height:auto;aspect-ratio:1;background:#0a0a0a;border:1px solid var(--line);border-radius:14px;touch-action:none}
.dpad{display:none;grid-template-columns:repeat(3,54px);grid-template-areas:". u ." "l d r";gap:6px;margin-top:4px}
.dpad button{height:54px;border:0;border-radius:12px;background:#1a1a1a;color:var(--y);font-size:20px;cursor:pointer}
.dpad [data-d=u]{grid-area:u}.dpad [data-d=l]{grid-area:l}.dpad [data-d=d]{grid-area:d}.dpad [data-d=r]{grid-area:r}
@media (pointer:coarse){.dpad{display:grid}}
.tprompt{margin:0 0 14px;padding:14px 16px;background:#0a0a0a;border:1px solid var(--line);border-radius:12px;font:500 clamp(15px,2.4vw,18px)/1.8 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--muted)}
.tprompt .ok{color:var(--text)}
.tprompt .bad{color:#fca5a5;background:rgba(239,68,68,.25)}
.tprompt .cur{color:var(--text);border-bottom:2px solid var(--y)}
.trow{margin-top:14px;align-items:center;justify-content:space-between}
.trow .mini{padding:10px 16px}

/* footer, dock, toast */
footer{padding:34px 0 46px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
.frow{display:flex;justify-content:space-between;flex-wrap:wrap;gap:6px 14px}
.frow+.frow{margin-top:8px}
footer a:hover{color:var(--y)}
.dock{position:fixed;right:14px;bottom:calc(14px + env(safe-area-inset-bottom,0px));z-index:40;display:flex;align-items:center;gap:8px;padding:6px 6px 6px 12px;background:rgba(10,10,10,.85);border:1px solid var(--line);border-radius:999px;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.dots{display:flex;gap:7px}
.dots button{width:18px;height:18px;padding:0;border:2px solid transparent;border-radius:50%;cursor:pointer;transition:transform .15s}
.dots button:hover{transform:scale(1.18)}
.dots button[aria-pressed=true]{border-color:#fff}
.dock #up{width:34px;height:34px;border:0;border-radius:50%;background:var(--y);color:#000;font-size:17px;font-weight:800;cursor:pointer}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));z-index:70;transform:translate(-50%,20px);opacity:0;pointer-events:none;padding:11px 20px;background:var(--y);color:#000;border-radius:999px;font-weight:600;font-size:14px;transition:opacity .25s,transform .25s}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* scroll reveal */
html.js .rv{opacity:0;transform:translateY(20px);transition:opacity .7s,transform .7s}
html.js .rv.in{opacity:1;transform:none}

/* responsive */
@media (max-width:860px){
  .hero{grid-template-columns:1fr;gap:36px;padding-top:130px}
  .gwrap,.calcwrap{grid-template-columns:1fr}
  .frow{flex-direction:column}
  .nav{width:100%;max-width:520px;justify-content:space-between;border-radius:22px}
  .burger{display:grid;gap:5px;place-content:center;width:42px;height:42px;background:var(--y);border:0;border-radius:50%;cursor:pointer}
  .burger i{display:block;width:18px;height:2px;background:#000;transition:transform .25s,opacity .25s}
  .burger[aria-expanded=true] i:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .burger[aria-expanded=true] i:nth-child(2){opacity:0}
  .burger[aria-expanded=true] i:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav nav{position:absolute;top:calc(100% + 10px);left:0;right:0;flex-direction:column;align-items:stretch;gap:4px;padding:10px;background:rgba(10,10,10,.96);border:1px solid var(--line);border-radius:20px;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .2s,transform .2s,visibility .2s}
  .nav nav.show{opacity:1;visibility:visible;transform:none}
  .nb{padding:13px 18px;text-align:left}
  .nb-hot{margin:4px 0 0;text-align:center}
}
@media (min-width:861px) and (max-width:1000px){.nb{padding:9px 13px}}
@media (max-width:480px){.dots{display:none}.dock{padding:6px}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}html.js .rv{opacity:1;transform:none}}