:root{color-scheme:dark;font-family:Inter,PingFang SC,Microsoft YaHei,system-ui,sans-serif;background:#0c0e0c;color:#f4f0df;font-synthesis:none;--ink: #f4f0df;--muted: #8f978c;--panel: #171a17;--line: #30362f;--green: #b8f34b;--green-dark: #253515;--red: #ff5a48;--amber: #f4bc45}*{box-sizing:border-box}html,body{min-height:100%}body{margin:0;min-width:320px;min-height:100svh;background:linear-gradient(rgba(255,255,255,.018) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.018) 1px,transparent 1px),#0c0e0c;background-size:36px 36px;display:grid;place-items:center;padding:24px;overflow-x:hidden}button{font:inherit}button:focus-visible{outline:2px solid var(--ink);outline-offset:3px}.game-shell{width:min(680px,calc(100vw - 48px));min-width:0}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:34px;height:34px;border:7px solid var(--green);border-right-color:transparent;border-radius:50%;transform:rotate(-38deg);box-shadow:0 0 18px #b8f34b29}h1,h2,p{margin:0}h1{font-size:19px;line-height:1.1;letter-spacing:0}.brand p{margin-top:5px;color:var(--muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10px;letter-spacing:0}.icon-button{width:40px;height:40px;border:1px solid var(--line);border-radius:6px;background:var(--panel);color:var(--ink);font-size:20px;cursor:pointer}.icon-button.muted{color:var(--muted)}.scoreboard{min-height:76px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;border:1px solid var(--line);border-bottom:0;background:#141714;padding:12px 18px}.scoreboard>div{display:flex;flex-direction:column;gap:4px}.scoreboard .best-score{align-items:flex-end}.label{color:var(--muted);font-size:11px}.scoreboard strong{color:var(--green);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:27px;line-height:1;font-variant-numeric:tabular-nums}.scoreboard .best-score strong{color:var(--amber)}.scoreboard .status-wrap{flex-direction:row;align-items:center;gap:7px;color:#c9cec6;font-size:12px}.status-dot{width:7px;height:7px;border-radius:50%;background:var(--amber);box-shadow:0 0 10px currentColor}.status-dot.playing{background:var(--green)}.status-dot.dead{background:var(--red)}.board-wrap{position:relative;width:100%;aspect-ratio:1;border:1px solid var(--line);background:#111410;overflow:hidden;touch-action:none}canvas{display:block;width:100%;height:100%}.scanlines{position:absolute;inset:0;pointer-events:none;opacity:.08;background:repeating-linear-gradient(0deg,transparent 0 3px,#000 3px 4px)}.game-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center;background:#0a0c0acc;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);transition:opacity .16s ease,visibility .16s ease}.game-overlay.hidden{opacity:0;visibility:hidden;pointer-events:none}.overlay-symbol{display:grid;place-items:center;width:58px;height:58px;margin-bottom:18px;border:2px solid var(--green);color:var(--green);font:800 28px/1 ui-monospace,monospace;transform:rotate(45deg)}.overlay-symbol:first-line{transform:rotate(-45deg)}.game-overlay h2{font-size:clamp(26px,6vw,40px);letter-spacing:0}.game-overlay p{margin-top:10px;color:#aeb4aa;font-size:14px}.primary-button{min-width:150px;min-height:46px;margin-top:26px;border:0;border-radius:4px;background:var(--green);color:#12160d;font-weight:800;cursor:pointer;box-shadow:5px 5px #48651d}.primary-button:active{transform:translate(3px,3px);box-shadow:2px 2px #48651d}.key-hint{margin-top:17px;color:#737a70;font:11px/1.4 ui-monospace,SFMono-Regular,Menlo,monospace}.controls{display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;min-height:108px;padding:14px 16px;border:1px solid var(--line);border-top:0;background:#141714}.dpad{display:grid;grid-template-columns:repeat(3,34px);grid-template-rows:repeat(2,34px);gap:4px}.direction{border:1px solid #3a4138;border-radius:4px;background:#21251f;color:#cbd1c6;cursor:pointer;font-size:16px;line-height:1;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.direction:active,.direction.active{background:var(--green-dark);color:var(--green);border-color:#597728}.direction.up{grid-column:2}.direction.left{grid-column:1;grid-row:2}.direction.down{grid-column:2;grid-row:2}.direction.right{grid-column:3;grid-row:2}.control-copy{display:flex;flex-direction:column;gap:5px}.control-copy strong{font-size:13px}.control-copy span{color:var(--muted);font-size:11px}.pause-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:88px;min-height:40px;border:1px solid #414840;border-radius:4px;background:transparent;color:var(--ink);cursor:pointer}.pause-button:disabled{opacity:.35;cursor:default}@media(max-width:900px),(pointer:coarse){.controls{grid-template-columns:1fr auto 1fr;min-height:150px;gap:20px;padding:16px 20px}.dpad{grid-column:2;grid-template-columns:repeat(3,58px);grid-template-rows:repeat(2,58px);gap:6px;justify-self:center}.direction{font-size:26px;border-color:#4a5347}.pause-button{grid-column:3;justify-self:end;min-width:96px;min-height:54px;font-size:15px}.control-copy{grid-column:1;grid-row:1}}@media(max-width:600px){body{place-items:start center;padding:max(14px,env(safe-area-inset-top)) 12px max(14px,env(safe-area-inset-bottom))}.game-shell{width:min(520px,calc(100vw - 24px))}.topbar{margin:2px 2px 14px}.scoreboard{min-height:66px;padding:10px 12px}.scoreboard strong{font-size:23px}.scoreboard .status-wrap{font-size:10px}.controls{grid-template-columns:1fr;gap:12px;padding:14px 12px}.control-copy{display:none}.dpad{grid-column:1}.pause-button{grid-column:1;min-width:100px;justify-self:center}}@media(max-width:360px){.controls{gap:8px}.dpad{grid-template-columns:repeat(3,52px);grid-template-rows:repeat(2,52px);gap:5px}.pause-button{min-width:72px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}