/* Play with a friend (kd 2026-11-07): same neon orange Tron look as arcade.css, standalone page /games/duel/. */
:root{--bg:#030303;--neon:#FF6A00;--hi:#FF9A3D;--line:rgba(255,106,0,.24);--text:#FFE9D6;--muted:#C9A889;--p2:#36E2FF}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font-family:'Chakra Petch',system-ui,sans-serif;-webkit-tap-highlight-color:transparent}
body::before{content:"";position:fixed;inset:auto 0 0 0;height:50vh;pointer-events:none;z-index:-1;background:repeating-linear-gradient(90deg,rgba(255,106,0,.14) 0 1px,transparent 1px 60px),repeating-linear-gradient(0deg,rgba(255,106,0,.12) 0 1px,transparent 1px 60px);transform:perspective(400px) rotateX(58deg);transform-origin:bottom;-webkit-mask-image:linear-gradient(to top,#000,transparent 85%);mask-image:linear-gradient(to top,#000,transparent 85%)}
a{color:var(--hi)}
.px{font-family:'Press Start 2P',monospace;font-size:10px;letter-spacing:.12em;color:var(--neon);text-shadow:0 0 10px rgba(255,106,0,.7);margin:0}
.blink{animation:blink 1.6s steps(2) infinite}@keyframes blink{50%{opacity:.35}}
.dh{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 16px;background:rgba(3,3,3,.9);border-bottom:1px solid var(--line)}
.dh-logo{display:flex;align-items:center;gap:8px;text-decoration:none}.dh-logo img{filter:brightness(0) invert(1);height:28px;width:auto}
.dh-logo i{font-style:normal;font-family:'Press Start 2P',monospace;font-size:8px;color:var(--neon);padding:4px 6px;border-radius:4px;box-shadow:inset 0 0 0 1px var(--neon)}
.dh-me{font-family:Orbitron,sans-serif;font-size:11px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase}
.dm{max-width:720px;margin:0 auto;padding:26px 16px 50px}
h1{font-family:Orbitron,sans-serif;font-weight:900;font-size:clamp(30px,7vw,52px);line-height:1.02;text-transform:uppercase;margin:14px 0 0;text-shadow:0 0 14px rgba(255,106,0,.7)}
h1 span{color:var(--neon)}
.lede{color:var(--muted);font-size:16px;margin:12px 0 22px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 18px;border:0;border-radius:8px;cursor:pointer;text-decoration:none;font:800 12px Orbitron,sans-serif;letter-spacing:.12em;text-transform:uppercase;color:var(--neon);background:transparent;box-shadow:inset 0 0 0 1.5px var(--neon)}
.btn.solid{background:var(--neon);color:#000;box-shadow:0 0 18px rgba(255,106,0,.55)}
.btn.wa{background:#25D366;color:#fff;box-shadow:none;margin-top:10px}
.btn.ghost{box-shadow:inset 0 0 0 1px var(--line);color:var(--muted)}
.btn.small{min-height:36px;font-size:10px;margin-top:18px}
.btn:active{transform:scale(.97)}
.dgames{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.dg{position:relative;text-align:left;cursor:pointer;padding:18px 14px;border:0;border-radius:10px;background:#070504;color:var(--text);box-shadow:inset 0 0 0 1px var(--line);min-height:120px;font-family:inherit;transition:box-shadow .25s}
.dg:hover,.dg.on{box-shadow:inset 0 0 0 1.5px var(--neon),0 0 20px rgba(255,106,0,.35)}
.dg b{display:block;font:800 16px Orbitron,sans-serif;text-transform:uppercase;letter-spacing:.04em}
.dg span{display:block;color:var(--muted);font-size:13px;margin-top:6px}
.dg i{position:absolute;right:10px;top:10px;font-style:normal;font-family:'Press Start 2P',monospace;font-size:7px;color:var(--neon)}
.dpick{margin-top:18px;padding:16px;border-radius:10px;box-shadow:inset 0 0 0 1px var(--neon);background:#060403}
.dacts{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
.dlogin{padding:16px;border-radius:10px;box-shadow:inset 0 0 0 1px var(--neon);margin-bottom:18px}
.dlogin p{margin:0 0 12px}
.dw{text-align:center;padding:30px 0}
.dlink{display:flex;gap:8px;margin-top:12px}
.dlink input{flex:1;min-width:0;min-height:46px;border-radius:8px;border:0;padding:0 12px;background:#000;color:var(--text);box-shadow:inset 0 0 0 1px var(--line);font:500 14px 'Chakra Petch',sans-serif}
.dnote{color:var(--muted);font-size:14px;margin:16px 0}
.dbar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-radius:10px;background:#060403;box-shadow:inset 0 0 0 1px var(--line)}
.pl{font:700 13px Orbitron,sans-serif;text-transform:uppercase;letter-spacing:.06em;max-width:40%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#p1{color:var(--neon)}#p2{color:var(--p2);text-align:right}
.pl.me::after{content:" (you)";color:var(--muted);font-size:10px}
.sc{font:900 18px Orbitron,sans-serif}
.dstatus{text-align:center;font:700 14px Orbitron,sans-serif;letter-spacing:.06em;text-transform:uppercase;margin:14px 0;min-height:20px}
.dboard{display:flex;justify-content:center}
/* tic tac toe */
.ttt{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;width:min(92vw,360px)}
.ttt button{aspect-ratio:1;border:0;border-radius:10px;background:#070504;box-shadow:inset 0 0 0 1px var(--line);font:900 clamp(40px,12vw,64px) Orbitron,sans-serif;cursor:pointer}
.ttt .x{color:var(--neon);text-shadow:0 0 14px var(--neon)}.ttt .o{color:var(--p2);text-shadow:0 0 14px var(--p2)}
.ttt .win{box-shadow:inset 0 0 0 2px var(--hi),0 0 18px rgba(255,106,0,.5)}
/* four in a row */
.c4{display:grid;grid-template-columns:repeat(7,1fr);gap:5px;width:min(94vw,440px);padding:8px;border-radius:12px;background:#0a0603;box-shadow:inset 0 0 0 1px var(--neon)}
.c4 button{aspect-ratio:1;border:0;border-radius:50%;background:#000;box-shadow:inset 0 0 0 1px var(--line);cursor:pointer;padding:0}
.c4 .a{background:var(--neon);box-shadow:0 0 10px var(--neon)}.c4 .b{background:var(--p2);box-shadow:0 0 10px var(--p2)}
.c4 .win{outline:2px solid #fff;outline-offset:-4px}
/* chess */
.ch{display:grid;grid-template-columns:repeat(8,1fr);width:min(94vw,480px);border-radius:6px;overflow:hidden;box-shadow:0 0 0 1.5px var(--neon),0 0 24px rgba(255,106,0,.3)}
.ch button{aspect-ratio:1;border:0;padding:0;cursor:pointer;font-size:clamp(24px,8.5vw,44px);line-height:1;position:relative;font-family:'Segoe UI Symbol','Noto Sans Symbols 2','DejaVu Sans',serif}
.ch .l{background:#2a1608}.ch .d{background:#0b0603}
.ch .w{color:#FFE9D6;text-shadow:0 0 6px rgba(255,154,61,.8)}.ch .k{color:#FF6A00;text-shadow:0 0 6px rgba(255,106,0,.9)}
.ch .sel{box-shadow:inset 0 0 0 3px var(--hi)}
.ch .mv::after{content:"";position:absolute;left:50%;top:50%;width:22%;height:22%;border-radius:50%;background:rgba(255,154,61,.7);transform:translate(-50%,-50%)}
.ch .last{box-shadow:inset 0 0 0 2px rgba(54,226,255,.6)}
.ch .chk{box-shadow:inset 0 0 0 3px #ff2a2a}
/* ping pong */
.pp{width:min(94vw,420px);aspect-ratio:9/14;border-radius:10px;background:#000;box-shadow:inset 0 0 0 1.5px var(--neon),0 0 24px rgba(255,106,0,.3);touch-action:none;display:block}
.dseo{margin-top:46px;padding:18px;border-radius:10px;box-shadow:inset 0 0 0 1px var(--line);color:var(--muted);font-size:14px}
.dseo h2{font:800 14px Orbitron,sans-serif;letter-spacing:.08em;text-transform:uppercase;color:var(--neon);margin:0 0 8px}
[hidden]{display:none!important}
@media (prefers-reduced-motion:reduce){.blink{animation:none}}