:root{color-scheme:dark;--bg:#09090f;--white:#f7f7fb;--purple:#b39aff;--muted:#aaa3ba}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--white);font:16px/1.6 Arial,sans-serif}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #fff;outline-offset:4px}button:disabled{opacity:.5;cursor:default}[hidden]{display:none!important}.arc-wrap{max-width:1160px;width:calc(100% - 40px);margin:auto}.arc-nav{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:24px 0;border-bottom:1px solid #30283d}.arc-nav nav{display:flex;gap:24px;flex-wrap:wrap}.arc-nav a:hover{color:var(--purple)}.arc-intro{display:flex;align-items:end;justify-content:space-between;gap:24px;padding:36px 0 24px}.arc-intro h1{font-size:clamp(34px,5vw,64px);line-height:1;margin:10px 0 18px;letter-spacing:-2px}.arc-intro p{color:var(--muted);max-width:580px}.eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:13px;font-weight:700;color:var(--purple)!important}.arc-layout{display:grid;grid-template-columns:minmax(0,760px) 1fr;gap:24px}.game-shell{border:1px solid #493759;border-radius:20px;padding:20px;background:#14101c}.scoreboard{display:flex;gap:24px;justify-content:space-between;padding:0 0 15px}.scoreboard span{display:block;font-size:13px;color:var(--muted)}.scoreboard strong{font-size:26px}.game-surface{background:#09080e;border-radius:12px;overflow:hidden;position:relative;min-height:320px;display:grid;place-items:center}.game-surface canvas{width:100%;height:auto;display:block;touch-action:none}.game-actions{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 8px}button,.arc-btn{border:1px solid #4b3b60;background:#241a32;color:white;border-radius:9px;padding:10px 18px;min-height:46px}.primary{background:var(--purple);color:#160c24;border-color:var(--purple);font-weight:700}.game-status{min-height:28px;color:#d3c4e6;margin:10px 0}.side-panel{background:#f4f0ff;color:#20162d;padding:25px;border-radius:20px;height:fit-content}.side-panel h2{margin:0;font-size:23px}.side-panel p{color:#554b62}.side-panel a{display:block;border-top:1px solid #d7ccdf;padding:14px 0;font-weight:bold}.side-panel a:hover{color:#6a3bbb}.dpad{display:grid;grid-template-columns:repeat(3,52px);justify-content:center;gap:6px;margin-top:15px}.dpad button{padding:8px}.dpad button:first-child{grid-column:2}.dpad button:nth-child(2){grid-column:1}.arc-foot{padding:34px 0;color:var(--muted);font-size:14px}.number-board{width:min(100%,480px);display:grid;grid-template-columns:repeat(4,1fr);gap:9px;padding:15px;touch-action:none}.number-tile{aspect-ratio:1;display:grid;place-items:center;background:#231b2d;border-radius:9px;font-size:clamp(21px,5vw,40px);font-weight:800;color:#fff}.number-tile[data-value="2"]{background:#eee7f6;color:#42314f}.number-tile[data-value="4"]{background:#d9c7ff;color:#2d1747}.number-tile[data-value="8"]{background:#b39aff;color:#20132b}.number-tile[data-value="16"]{background:#8f66dc}.number-tile[data-value="32"]{background:#7943c7}.number-tile[data-value="64"]{background:#582393}.number-tile[data-big="true"]{background:#ead574;color:#20182a}.memory-board{width:100%;display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:14px}.memory-card{aspect-ratio:1;border-radius:12px;font-size:clamp(22px,5vw,42px);padding:0;background:#291c3b;font-weight:bold}.memory-card.revealed{background:#b39aff;color:#180d29}.memory-card.matched{background:#33313b;color:#d4c6f2;border-color:#8977a2}.arc-catalog{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.arc-tile{display:block;border:1px solid #40334e;background:#17111f;border-radius:15px;overflow:hidden;transition:transform .2s,border-color .2s}.arc-tile:hover{transform:translateY(-4px);border-color:#b39aff}.tile-face{min-height:155px;display:flex;align-items:center;justify-content:center;background:#b39aff;color:#180c2b;font-size:50px;font-weight:900;letter-spacing:-3px}.arc-tile:nth-child(2n) .tile-face{background:#ede7f7}.tile-body{padding:20px}.tile-body h2,.tile-body h3{margin:0 0 8px;font-size:23px;line-height:1.2}.tile-body p{margin:0 0 14px;color:var(--muted);font-size:15px}.tile-body span{font-size:14px;color:var(--purple)}@media(max-width:850px){.arc-layout{grid-template-columns:1fr}.arc-catalog{grid-template-columns:repeat(2,1fr)}.side-panel{margin-top:5px}.arc-intro{display:block}.arc-nav{flex-wrap:wrap}}@media(max-width:480px){.arc-wrap{width:calc(100% - 24px)}.game-shell{padding:12px}.scoreboard{gap:12px}.game-surface{min-height:280px}.arc-nav nav{gap:18px;font-size:14px}.arc-catalog{gap:12px}.tile-face{min-height:120px;font-size:38px}.tile-body{padding:15px}.tile-body h2{font-size:20px}.memory-board{gap:7px;padding:9px}.number-board{gap:7px;padding:10px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}