@font-face{font-family:'Chakra Petch';font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/chakra-petch-latin-500-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Chakra Petch';font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/chakra-petch-latin-ext-500-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Chakra Petch';font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/chakra-petch-latin-600-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Chakra Petch';font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/chakra-petch-latin-ext-600-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Chakra Petch';font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/chakra-petch-latin-700-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Chakra Petch';font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/chakra-petch-latin-ext-700-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
/* Layout: one centered play column — app bar, mode switch, the classic beveled game window as the hero, a sticky tool strip; reference text below. */
:root{
  --bg:#e4e9ef; --bg2:#d6dde5; --panel:#f3f5f8; --ink:#16202b; --muted:#536172; --line:#c2cad3;
  --chassis:#c4ccd5; --hi:#f8fafc; --lo:#7a8593; --cell:#cfd6de; --cellHover:#dbe1e8; --open:#e9edf1; --grid:#b1bac4; --mineBg:#e9edf1;
  --accent:#1f56c9; --accentInk:#ffffff; --star:#e9a514; --starOff:#b9c1ca; --boom:#e5372b; --ok:#1d8a3e;
  --led:#170a0a; --ledOn:#ff3b2b; --ledOff:#3b1610; --face:#ffd43b; --faceInk:#1b1b1b;
  --n1:#1d3fd6; --n2:#167a2a; --n3:#d1231b; --n4:#152982; --n5:#86190f; --n6:#0b8584; --n7:#1e1e1e; --n8:#677180;
  --flag:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M8 27h16v-2.5l-3-1.5h-10l-3 1.5z' fill='%23161a1f'/%3E%3Crect x='15' y='6' width='2.6' height='18' fill='%23161a1f'/%3E%3Cpath d='M17.6 4.5 5.5 10.6l12.1 6.1z' fill='%23e5372b'/%3E%3C/svg%3E");
  --mine:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cg stroke='%23111' stroke-width='3' stroke-linecap='round'%3E%3Cpath d='M16 3.5v25M3.5 16h25M7.2 7.2l17.6 17.6M24.8 7.2 7.2 24.8'/%3E%3C/g%3E%3Ccircle cx='16' cy='16' r='9.2' fill='%23111'/%3E%3Ccircle cx='12.8' cy='12.8' r='2.7' fill='%23fff'/%3E%3C/svg%3E");
  --pA:#1f56c9; --pB:#d1231b;
  --flagA:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M8 27h16v-2.5l-3-1.5h-10l-3 1.5z' fill='%23161a1f'/%3E%3Crect x='15' y='6' width='2.6' height='18' fill='%23161a1f'/%3E%3Cpath d='M17.6 4.5 5.5 10.6l12.1 6.1z' fill='%231f56c9'/%3E%3C/svg%3E");
  --flagB:var(--flag);
  --flagW:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M8 27h16v-2.5l-3-1.5h-10l-3 1.5z' fill='%23fff'/%3E%3Crect x='15' y='6' width='2.6' height='18' fill='%23fff'/%3E%3Cpath d='M17.6 4.5 5.5 10.6l12.1 6.1z' fill='%23fff'/%3E%3C/svg%3E");
  --display:"Chakra Petch","Bahnschrift","Segoe UI",system-ui,sans-serif;
  --body:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#12161b; --bg2:#1a2027; --panel:#1b2128; --ink:#e7ecf2; --muted:#94a1b0; --line:#2d353f;
  --chassis:#2a313a; --hi:#4a5562; --lo:#0f1317; --cell:#3a434e; --cellHover:#46515d; --open:#1e242b; --grid:#14181d; --mineBg:#59636f;
  --accent:#6f9bff; --accentInk:#0b1220; --star:#f5b82a; --starOff:#46505c; --boom:#e5372b; --ok:#4cc46c;
  --led:#090404; --ledOn:#ff4a36; --ledOff:#2a0f0b; --face:#ffd43b; --faceInk:#1b1b1b;
  --n1:#7d97ff; --n2:#5ccb74; --n3:#ff6a5f; --n4:#b3bcff; --n5:#ec9467; --n6:#45d8d1; --n7:#eceff3; --n8:#a3adb9;
  --flag:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M8 27h16v-2.5l-3-1.5h-10l-3 1.5z' fill='%23e8edf3'/%3E%3Crect x='15' y='6' width='2.6' height='18' fill='%23e8edf3'/%3E%3Cpath d='M17.6 4.5 5.5 10.6l12.1 6.1z' fill='%23ff5646'/%3E%3C/svg%3E");
  --pA:#3d6fe0; --pB:#e0392e;
  --flagA:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M8 27h16v-2.5l-3-1.5h-10l-3 1.5z' fill='%23e8edf3'/%3E%3Crect x='15' y='6' width='2.6' height='18' fill='%23e8edf3'/%3E%3Cpath d='M17.6 4.5 5.5 10.6l12.1 6.1z' fill='%236f9bff'/%3E%3C/svg%3E");
  --flagB:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M8 27h16v-2.5l-3-1.5h-10l-3 1.5z' fill='%23e8edf3'/%3E%3Crect x='15' y='6' width='2.6' height='18' fill='%23e8edf3'/%3E%3Cpath d='M17.6 4.5 5.5 10.6l12.1 6.1z' fill='%23ff5646'/%3E%3C/svg%3E");
  color-scheme:dark;
}}
:root[data-theme="dark"]{
  --bg:#12161b; --bg2:#1a2027; --panel:#1b2128; --ink:#e7ecf2; --muted:#94a1b0; --line:#2d353f;
  --chassis:#2a313a; --hi:#4a5562; --lo:#0f1317; --cell:#3a434e; --cellHover:#46515d; --open:#1e242b; --grid:#14181d; --mineBg:#59636f;
  --accent:#6f9bff; --accentInk:#0b1220; --star:#f5b82a; --starOff:#46505c; --boom:#e5372b; --ok:#4cc46c;
  --led:#090404; --ledOn:#ff4a36; --ledOff:#2a0f0b; --face:#ffd43b; --faceInk:#1b1b1b;
  --n1:#7d97ff; --n2:#5ccb74; --n3:#ff6a5f; --n4:#b3bcff; --n5:#ec9467; --n6:#45d8d1; --n7:#eceff3; --n8:#a3adb9;
  --flag:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M8 27h16v-2.5l-3-1.5h-10l-3 1.5z' fill='%23e8edf3'/%3E%3Crect x='15' y='6' width='2.6' height='18' fill='%23e8edf3'/%3E%3Cpath d='M17.6 4.5 5.5 10.6l12.1 6.1z' fill='%23ff5646'/%3E%3C/svg%3E");
  --pA:#3d6fe0; --pB:#e0392e;
  --flagA:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M8 27h16v-2.5l-3-1.5h-10l-3 1.5z' fill='%23e8edf3'/%3E%3Crect x='15' y='6' width='2.6' height='18' fill='%23e8edf3'/%3E%3Cpath d='M17.6 4.5 5.5 10.6l12.1 6.1z' fill='%236f9bff'/%3E%3C/svg%3E");
  --flagB:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M8 27h16v-2.5l-3-1.5h-10l-3 1.5z' fill='%23e8edf3'/%3E%3Crect x='15' y='6' width='2.6' height='18' fill='%23e8edf3'/%3E%3Cpath d='M17.6 4.5 5.5 10.6l12.1 6.1z' fill='%23ff5646'/%3E%3C/svg%3E");
  color-scheme:dark;
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 var(--body);-webkit-tap-highlight-color:transparent}
button{font:inherit;color:inherit}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.shell{max-width:1100px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}

/* bevel helpers */
.raised{background:var(--chassis);box-shadow:inset 2px 2px 0 var(--hi),inset -2px -2px 0 var(--lo)}
.sunken{box-shadow:inset 2px 2px 0 var(--lo),inset -2px -2px 0 var(--hi)}

/* app bar */
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-block:12px 8px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-tile{width:34px;height:34px;border-radius:7px;display:grid;place-items:center}
.brand-tile i{width:22px;height:22px;background:var(--mine) center/contain no-repeat;display:block}
.brand b{font:700 21px/1 var(--display);letter-spacing:.06em;text-transform:uppercase}
.brand span{font:600 14px/1 var(--display);color:var(--muted);letter-spacing:.02em}
.icons{display:flex;gap:6px}
.ib{width:40px;height:40px;border:0;border-radius:9px;display:grid;place-items:center;cursor:pointer}
.ib:active{box-shadow:inset 2px 2px 0 var(--lo),inset -1px -1px 0 var(--hi)}
.ib svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* mode switch */
.play{display:flex;flex-direction:column;align-items:center;gap:10px;padding-bottom:8px}
.modes{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:4px;border-radius:11px;background:var(--bg2);width:100%;max-width:520px}
.modes button{border:0;background:transparent;padding:9px 6px;border-radius:8px;font:600 14px/1.1 var(--display);letter-spacing:.02em;color:var(--muted);cursor:pointer;white-space:nowrap}
.modes button[aria-selected="true"]{color:var(--ink);background:var(--chassis);box-shadow:inset 2px 2px 0 var(--hi),inset -2px -2px 0 var(--lo)}
.sub{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;min-height:38px;width:100%;max-width:720px}
.chip{border:0;border-radius:8px;padding:7px 12px;font:600 13.5px/1.1 var(--display);cursor:pointer;background:var(--chassis);box-shadow:inset 2px 2px 0 var(--hi),inset -2px -2px 0 var(--lo);white-space:nowrap}
.chip[aria-pressed="true"]{background:var(--accent);color:var(--accentInk);box-shadow:none}
.chip:disabled{opacity:.4;cursor:default}
.chip small{font-weight:500;opacity:.75;margin-left:4px}
.lvl-title{font:700 16px/1.1 var(--display);letter-spacing:.02em;text-align:center;min-width:132px}
.lvl-title small{display:block;font:500 12px/1.3 var(--body);color:var(--muted);letter-spacing:0}
.pill{display:inline-flex;align-items:center;gap:6px;font:600 13px/1 var(--display);color:var(--muted)}
.pill svg{width:15px;height:15px;fill:var(--star)}

/* game window */
.win{display:flex;flex-direction:column;gap:9px;padding:9px;border-radius:10px;max-width:100%;
  background:var(--chassis);box-shadow:inset 2px 2px 0 var(--hi),inset -2px -2px 0 var(--lo),0 22px 44px -26px rgba(15,25,40,.55)}
.hud{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:6px 7px;border-radius:6px}
.led{display:flex;gap:2px;padding:3px 4px;background:var(--led);border-radius:4px;box-shadow:inset 1px 1px 0 var(--lo),inset -1px -1px 0 var(--hi)}
.led svg{width:15px;height:27px;display:block}
.led .on{fill:var(--ledOn)} .led .off{fill:var(--ledOff)}
.face{width:44px;height:44px;border:0;border-radius:8px;padding:5px;cursor:pointer;background:var(--chassis);box-shadow:inset 2px 2px 0 var(--hi),inset -2px -2px 0 var(--lo)}
.face:active{box-shadow:inset 2px 2px 0 var(--lo),inset -1px -1px 0 var(--hi);padding:6px 4px 4px 6px}
.face svg{width:100%;height:100%;display:block}
.wrap{border-radius:5px;padding:3px;max-width:100%;overflow:auto;overscroll-behavior:contain;
  box-shadow:inset 3px 3px 0 var(--lo),inset -3px -3px 0 var(--hi)}
.board{--c:30px;--b:max(2px,calc(var(--c) * .085));display:grid;grid-template-columns:repeat(var(--cols),var(--c));grid-auto-rows:var(--c);gap:1px;
  background:var(--grid);width:max-content;margin:0 auto;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;touch-action:manipulation}
.c{position:relative;display:grid;place-items:center;background-color:var(--cell);border-radius:2px;cursor:pointer;
  box-shadow:inset var(--b) var(--b) 0 var(--hi),inset calc(var(--b) * -1) calc(var(--b) * -1) 0 var(--lo);
  font:700 calc(var(--c) * .62)/1 var(--display);background-repeat:no-repeat;background-position:center;background-size:68%}
@media (hover:hover){.c:not(.o):hover{background-color:var(--cellHover)}}
.c.p{background-color:var(--open);box-shadow:none}
.c.o{background-color:var(--open);box-shadow:none;border-radius:0;cursor:default}
.c.o.n1,.c.o.n2,.c.o.n3,.c.o.n4,.c.o.n5,.c.o.n6,.c.o.n7,.c.o.n8{cursor:pointer}
.c.anim{animation:pop .2s ease-out both;animation-delay:var(--d,0ms)}
.c.f{background-image:var(--flag)}
.c.q{color:var(--muted)}
.c.m{background-color:var(--mineBg);background-image:var(--mine)}
.c.x{background-color:var(--boom)}
.c.wf{background-color:var(--mineBg);background-image:var(--mine)}
.c.wf::after{content:"";position:absolute;inset:14%;background:linear-gradient(45deg,transparent 44%,var(--boom) 44% 56%,transparent 56%),linear-gradient(-45deg,transparent 44%,var(--boom) 44% 56%,transparent 56%)}
.c.hint{outline:3px solid var(--accent);outline-offset:-3px;z-index:1;animation:hint 1s ease-in-out 2}
.n1{color:var(--n1)}.n2{color:var(--n2)}.n3{color:var(--n3)}.n4{color:var(--n4)}.n5{color:var(--n5)}.n6{color:var(--n6)}.n7{color:var(--n7)}.n8{color:var(--n8)}
.win.shake{animation:shake .42s cubic-bezier(.36,.07,.19,.97)}
@keyframes pop{from{transform:scale(.6);opacity:.2}to{transform:none;opacity:1}}
@keyframes hint{50%{outline-color:transparent}}
@keyframes shake{10%,90%{transform:translateX(-2px)}20%,80%{transform:translateX(4px)}30%,50%,70%{transform:translateX(-7px)}40%,60%{transform:translateX(7px)}}

/* tools */
.tools{position:sticky;bottom:0;z-index:5;width:100%;display:flex;justify-content:center;padding-block:8px calc(8px + env(safe-area-inset-bottom,0px));background:linear-gradient(to top,var(--bg) 70%,transparent)}
.tools-in{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center}
.seg{display:flex;padding:3px;gap:3px;border-radius:10px;background:var(--bg2)}
.seg button,.tb{border:0;display:inline-flex;align-items:center;gap:7px;padding:9px 13px;border-radius:8px;font:600 14px/1 var(--display);cursor:pointer;background:transparent;color:var(--muted)}
.seg button[aria-pressed="true"]{background:var(--accent);color:var(--accentInk);box-shadow:inset 0 -3px 0 rgba(0,0,0,.22)}
.seg button[aria-pressed="false"] :is(i,.ico){opacity:.6}
.seg .ico{width:18px;height:18px;flex:none}
.seg .ico .fl{fill:var(--boom)}
.seg button[aria-pressed="true"] .ico .fl{fill:currentColor}
@media (hover:hover){.seg button[aria-pressed="false"]:hover{color:var(--ink);background:color-mix(in srgb,var(--chassis) 60%,transparent)}}
/* active toggle: icons take the button's text colour so they stay readable on the accent fill */
.seg button[aria-pressed="true"] .i-tap{background:transparent;box-shadow:inset 0 0 0 2.5px currentColor}
.seg button i,.tb i{width:18px;height:18px;display:inline-block;background-size:contain;background-repeat:no-repeat;background-position:center}
.i-flag{background-image:var(--flag)}
.i-tap{border-radius:50%;background:var(--cell);box-shadow:inset 2px 2px 0 var(--hi),inset -2px -2px 0 var(--lo)}
.tb{background:var(--chassis);color:var(--ink);box-shadow:inset 2px 2px 0 var(--hi),inset -2px -2px 0 var(--lo)}
.tb:disabled{opacity:.45;cursor:default}
.tb svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.tb.sq{padding:9px}
.goal{font:600 13px/1.3 var(--display);color:var(--muted);text-align:center;min-height:17px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;font-variant-numeric:tabular-nums}
.goal b{color:var(--star);font-weight:700}
.endbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center;padding:10px 12px;border-radius:10px;background:var(--panel);border:1px solid var(--line);max-width:600px;width:100%}
.endbar p{margin:0;font:600 15px/1.3 var(--display);flex:1 1 180px;min-width:0}
.endbar .eb{display:flex;gap:8px;flex-wrap:wrap}
.endbar p small{display:block;font:400 13px/1.4 var(--body);color:var(--muted)}
.btn{border:0;border-radius:9px;padding:11px 16px;white-space:nowrap;font:700 14.5px/1 var(--display);letter-spacing:.02em;cursor:pointer;background:var(--chassis);color:var(--ink);box-shadow:inset 2px 2px 0 var(--hi),inset -2px -2px 0 var(--lo)}
.btn.primary{background:var(--accent);color:var(--accentInk);box-shadow:inset 0 -3px 0 rgba(0,0,0,.22)}
.btn:active{transform:translateY(1px)}

/* dialogs */
dialog{border:0;padding:0;border-radius:16px;background:var(--panel);color:var(--ink);width:min(540px,calc(100vw - 24px));max-height:calc(100dvh - 32px);box-shadow:0 30px 70px -20px rgba(0,0,0,.55)}
dialog::backdrop{background:rgba(8,12,20,.55)}
.dh{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px 10px;position:sticky;top:0;z-index:2;background:var(--panel)}
.dh h2{margin:0;font:700 20px/1.2 var(--display);letter-spacing:.02em}
.db{padding:6px 18px 18px}
.x{width:36px;height:36px;border:0;border-radius:8px;background:var(--bg2);cursor:pointer;font-size:20px;line-height:1}
.zone{margin:14px 0 8px;display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.zone h3{margin:0;font:700 15px/1.2 var(--display);letter-spacing:.04em;text-transform:uppercase}
.zone span{font:500 12.5px/1 var(--display);color:var(--muted)}
.tiles{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}
.tile{border:0;border-radius:9px;aspect-ratio:1/1;max-width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;cursor:pointer;background:var(--chassis);box-shadow:inset 2px 2px 0 var(--hi),inset -2px -2px 0 var(--lo);font:700 18px/1 var(--display)}
.tile.cur{outline:2px solid var(--accent);outline-offset:1px}
.tile:disabled{cursor:default;background:var(--bg2);box-shadow:none;color:var(--muted)}
.tile .st{display:flex;gap:1px}
.tile .st svg{width:12px;height:12px}
.s-on{fill:var(--star)} .s-off{fill:var(--starOff)}
.tile .lock{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2}
.res-stars{display:flex;justify-content:center;gap:8px;margin:4px 0 14px}
.res-stars svg{width:54px;height:54px;transform:scale(.4);opacity:0;animation:starIn .45s cubic-bezier(.2,1.6,.4,1) forwards}
.res-stars svg:nth-child(2){width:66px;height:66px;margin-top:-8px;animation-delay:.18s}
.res-stars svg:nth-child(3){animation-delay:.36s}
@keyframes starIn{to{transform:none;opacity:1}}
.kv{display:grid;grid-template-columns:1fr auto;gap:8px 16px;margin:0 0 16px;font-variant-numeric:tabular-nums}
.kv dt{color:var(--muted)} .kv dd{margin:0;font:600 15px/1.4 var(--display);text-align:right}
.badge{display:inline-block;padding:3px 8px;border-radius:6px;background:var(--accent);color:var(--accentInk);font:700 12px/1.2 var(--display);letter-spacing:.04em;text-transform:uppercase}
.row-btns{display:flex;gap:8px;flex-wrap:wrap}
.row-btns .btn{flex:1 1 auto;white-space:nowrap}
.set{display:flex;flex-direction:column}
.set label,.set .lab{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px solid var(--line);cursor:pointer}
.set label span small{display:block;color:var(--muted);font-size:13px}
.sw{appearance:none;-webkit-appearance:none;width:46px;height:28px;border-radius:14px;background:var(--line);position:relative;cursor:pointer;flex:none;transition:background .15s;margin:0}
.sw::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;transition:transform .15s;box-shadow:0 1px 3px rgba(0,0,0,.3)}
.sw:checked{background:var(--accent)} .sw:checked::after{transform:translateX(18px)}
.stat-h{font:700 14px/1.2 var(--display);letter-spacing:.05em;text-transform:uppercase;margin:16px 0 8px;color:var(--muted)}
.tops{margin:0;padding:0;list-style:none;display:grid;gap:4px;font-variant-numeric:tabular-nums}
.tops li{display:flex;justify-content:space-between;gap:10px;padding:7px 10px;border-radius:7px;background:var(--bg2)}
.tops li span{color:var(--muted);font-size:13px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.big{padding:10px;border-radius:10px;background:var(--bg2);text-align:center}
.big b{display:block;font:700 24px/1.1 var(--display);font-variant-numeric:tabular-nums}
.big span{font-size:12.5px;color:var(--muted)}
.toast{position:fixed;left:50%;bottom:calc(84px + env(safe-area-inset-bottom,0px));transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font:600 14px/1.3 var(--display);transition:.2s;z-index:50;max-width:calc(100vw - 32px);text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}
#fx{position:fixed;inset:0;pointer-events:none;z-index:60}

/* duel (multiplayer) */
.modes{grid-template-columns:repeat(4,1fr)}
.win{position:relative}
.lobby{width:100%;max-width:560px;display:flex;flex-direction:column;gap:12px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:12px}
.card h2{margin:0;font:700 21px/1.2 var(--display);letter-spacing:.02em}
.card p{margin:0;color:var(--muted)}
.card .note{font-size:13.5px}
.field{display:flex;flex-direction:column;gap:6px;font:600 13px/1.2 var(--display);color:var(--muted);letter-spacing:.02em}
.inp{font:600 16px/1.2 var(--display);padding:11px 12px;border-radius:9px;border:0;width:100%;min-width:0;background:var(--bg);color:var(--ink);box-shadow:inset 2px 2px 0 var(--lo),inset -2px -2px 0 var(--hi)}
.inp::placeholder{color:var(--muted);opacity:.7}
.jrow{display:flex;gap:8px}
.code-inp{text-transform:uppercase;letter-spacing:.2em;font-size:18px;flex:1}
.mcards{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mcard{text-align:left;border:0;border-radius:12px;padding:13px;cursor:pointer;display:flex;flex-direction:column;gap:5px;background:var(--chassis);box-shadow:inset 2px 2px 0 var(--hi),inset -2px -2px 0 var(--lo)}
.mcard[aria-pressed="true"]{outline:3px solid var(--accent);outline-offset:-1px}
.mcard b{display:flex;align-items:center;gap:8px;font:700 17px/1.2 var(--display);letter-spacing:.02em}
.mcard b i{width:20px;height:20px;background:center/contain no-repeat}
.mcard b i.fl2{border-radius:5px;background:var(--flagW) center/72% no-repeat,var(--pA)}
.mcard span{font-size:13px;line-height:1.4;color:var(--muted)}
.sizes{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.sizes .lab2{font:600 13px/1 var(--display);color:var(--muted);margin-right:2px}
.btn.wide{width:100%;padding:14px 16px;font-size:16px}
.btn:disabled{opacity:.55;cursor:default;transform:none}
.room-code{font:700 44px/1 var(--display);letter-spacing:.2em;text-align:center;padding:6px 0 2px;margin-right:-.2em}
.wait-dots::after{content:"";animation:dots 1.4s steps(4) infinite}
@keyframes dots{0%{content:""}25%{content:"."}50%{content:".."}75%{content:"..."}}
.mpbar{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:8px;align-items:stretch;width:100%;max-width:560px}
.pl{display:flex;flex-direction:column;gap:5px;padding:8px 10px;border-radius:10px;background:var(--panel);border:1px solid var(--line);min-width:0;transition:box-shadow .15s,border-color .15s}
.pl.r{text-align:right}
.pl .top{display:flex;align-items:center;gap:7px;min-width:0}
.pl.r .top{flex-direction:row-reverse}
.pl .nm{font:600 14px/1.2 var(--display);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.pl .sc{font:700 24px/1 var(--display);margin-left:auto;font-variant-numeric:tabular-nums}
.pl.r .sc{margin-left:0;margin-right:auto}
.pl .fl{width:20px;height:20px;flex:none;border-radius:5px;background:var(--flagW) center/72% no-repeat}
.pl .fl.a{background-color:var(--pA)}.pl .fl.b{background-color:var(--pB)}
.pl .meta{font:500 12px/1.2 var(--body);color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pl.turn{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
.pl.off .nm{opacity:.55}
.dot{width:8px;height:8px;border-radius:50%;flex:none;background:var(--ok)}
.pl.off .dot{background:var(--starOff)}
.bar2{height:6px;border-radius:3px;background:var(--bg2);overflow:hidden}
.bar2 i{display:block;height:100%;width:0;background:var(--accent);transition:width .3s}
.pl.r .bar2 i{margin-left:auto;background:var(--pB)}
.vs{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font:700 12px/1 var(--display);color:var(--muted);letter-spacing:.06em;min-width:34px}
.vs b{font-size:15px;color:var(--ink);font-variant-numeric:tabular-nums}
.c.o.fa,.c.o.fb{background-image:var(--flagW);background-size:62%;border-radius:2px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.18)}
.c.o.fa{background-color:var(--pA)}
.c.o.fb{background-color:var(--pB)}
.c.lastA{box-shadow:inset 0 0 0 2px var(--pA)}
.c.lastB{box-shadow:inset 0 0 0 2px var(--pB)}
.c.bz{outline:2px dashed var(--boom);outline-offset:-2px;z-index:1}
.board.wait .c:not(.o){cursor:not-allowed}
.board.wait{filter:saturate(.75)}
.cd{position:absolute;inset:0;z-index:4;display:grid;place-items:center;border-radius:10px;background:color-mix(in srgb,var(--bg) 55%,transparent);backdrop-filter:blur(2px);font:700 76px/1 var(--display);color:var(--ink);pointer-events:none}
.cd span{animation:cdpop .9s ease-out both}
.cd small{display:block;font:600 15px/1.3 var(--display);color:var(--muted);text-align:center;margin-top:6px}
@keyframes cdpop{from{transform:scale(1.6);opacity:0}30%{transform:scale(1);opacity:1}}
.tb[aria-pressed="true"]{background:var(--boom);color:#fff;box-shadow:none}
@media (max-width:480px){.modes button{font-size:13px;padding:9px 2px}.modes .lg{display:none}.mcards{grid-template-columns:1fr}}

/* reference content */
.about{padding-block:40px 24px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px 48px;border-top:1px solid var(--line);margin-top:28px}
.about h1{grid-column:1/-1;margin:0;font:700 clamp(26px,4vw,36px)/1.15 var(--display);letter-spacing:.01em;text-wrap:balance}
.about .lead{grid-column:1/-1;margin:0;max-width:68ch;color:var(--muted);font-size:16.5px}
.about h2{margin:0 0 8px;font:700 19px/1.25 var(--display);letter-spacing:.02em;text-wrap:balance}
.about section{min-width:0}
.about p,.about li{max-width:65ch}
.about ol,.about ul{padding-left:20px;margin:0}
.about li{margin-bottom:6px}
.about kbd{font:600 12.5px/1 var(--display);padding:2px 6px;border-radius:5px;background:var(--chassis);box-shadow:inset 1px 1px 0 var(--hi),inset -1px -1px 0 var(--lo)}
.tbl-wrap{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line)}
th{font:600 12.5px/1.2 var(--display);letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}
details{border-bottom:1px solid var(--line);padding:10px 0}
summary{cursor:pointer;font-weight:600}
details p{margin:8px 0 0;color:var(--muted)}
footer{padding-block:20px 32px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media (max-width:760px){.about{grid-template-columns:minmax(0,1fr)}}
@media (max-width:420px){.brand span{display:none}.seg button{padding:9px 10px}.tb{padding:9px 11px}}
@media (pointer:fine) and (min-width:761px){.tools{position:static;background:none}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

/* subpages: footer nav, breadcrumbs, article layout, board diagrams */
footer{flex-direction:column;align-items:flex-start;gap:10px}
.fnav{display:flex;flex-wrap:wrap;gap:6px 18px}
.fnav a{font:600 14px/1.3 var(--display);letter-spacing:.02em;text-decoration:none}
.fnav a:hover{text-decoration:underline}
.crumbs{grid-column:1/-1;font-size:13px;color:var(--muted);margin-bottom:-8px}
.crumbs a{color:var(--muted)}
.bar .btn{padding:10px 14px;font-size:14px;text-decoration:none}
.doc{max-width:760px;margin:0 auto;padding-block:20px 32px}
.doc h1{margin:10px 0 12px;font:700 clamp(28px,5vw,40px)/1.12 var(--display);letter-spacing:.01em;text-wrap:balance}
.doc .lead{margin:0 0 16px;color:var(--muted);font-size:17px;max-width:68ch}
.doc section{padding-top:28px;scroll-margin-top:12px}
.doc h2{margin:0 0 10px;font:700 23px/1.25 var(--display);letter-spacing:.02em;text-wrap:balance}
.doc h3{margin:22px 0 6px;font:700 17px/1.3 var(--display);letter-spacing:.02em}
.doc p,.doc li{max-width:68ch}
.doc ol,.doc ul{padding-left:22px}
.doc li{margin-bottom:6px}
.doc kbd{font:600 12.5px/1 var(--display);padding:2px 6px;border-radius:5px;background:var(--chassis);box-shadow:inset 1px 1px 0 var(--hi),inset -1px -1px 0 var(--lo)}
.cta-row{display:flex;gap:8px;flex-wrap:wrap;margin:0}
.cta-row .btn{text-decoration:none}
.toc{margin-top:20px;padding:14px 16px;border-radius:12px;background:var(--panel);border:1px solid var(--line)}
.toc b{font:700 14px/1.2 var(--display);letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}
.toc ol{margin:8px 0 0;columns:2 220px;column-gap:24px}
.toc li{margin-bottom:4px;break-inside:avoid}
.cta{margin-top:32px;padding:18px;border-radius:14px;background:var(--panel);border:1px solid var(--line)}
.cta p{margin:0 0 12px}
.figs{display:flex;flex-wrap:wrap;gap:14px 18px;margin:12px 0 4px}
.mini{margin:0;display:flex;flex-direction:column;gap:6px;flex:0 1 150px;min-width:0}
.mini-b{--c:32px;--b:3px;display:grid;grid-template-columns:repeat(var(--cols),var(--c));grid-auto-rows:var(--c);gap:1px;padding:3px;width:max-content;
  background:var(--grid);border-radius:5px;box-shadow:inset 2px 2px 0 var(--lo),inset -2px -2px 0 var(--hi)}
.mini-b .c{cursor:default}
.mini-b .c.ok{color:var(--ok);font-size:19px}
.mini-b .c.q{color:var(--muted)}
.mini-b .c.dim{opacity:.45}
.mini figcaption{font-size:13px;line-height:1.4;color:var(--muted)}

/* on computers with a mouse: show a short mouse hint instead of the touch toggle */
.mhint{display:none;align-items:center;gap:8px;padding:9px 12px;border-radius:10px;background:var(--bg2);font:500 13.5px/1.2 var(--display);color:var(--muted);white-space:nowrap}
.mhint b{color:var(--ink);font-weight:700}
.mhint svg{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.mhint.on{background:var(--accent);color:var(--accentInk)}
.mhint.on b{color:inherit}
.mhint kbd{font:600 12px/1 var(--display);padding:1px 5px;border-radius:4px;background:rgba(0,0,0,.18)}
@media (hover:hover) and (pointer:fine){#seg{display:none}.mhint{display:inline-flex}}

/* long-press progress on touch screens */
.c.hold::before{content:"";position:absolute;inset:10%;border-radius:50%;border:3px solid var(--accent);animation:hold .34s linear both;pointer-events:none}
@keyframes hold{from{transform:scale(.25);opacity:.25}to{transform:scale(1);opacity:1}}

/* ranking */
dialog.wide{width:min(620px,calc(100vw - 24px))}
.lb{display:flex;flex-direction:column;gap:12px}
.lb-f{display:flex;flex-direction:column;gap:8px}
.lb-diffs{display:flex;gap:6px;flex-wrap:wrap}
.lb-per{align-self:flex-start;max-width:100%}
.lb-per button{padding:8px 11px;font-size:13.5px}
.lb-rows{margin:0;padding:0;list-style:none;display:grid;gap:4px;font-variant-numeric:tabular-nums}
.lb-rows li{display:grid;grid-template-columns:30px minmax(0,1fr) auto;grid-template-rows:auto auto;column-gap:10px;align-items:center;padding:7px 10px;border-radius:8px;background:var(--bg2)}
.lb-rows .pos{grid-row:1/3;font:700 16px/1 var(--display);color:var(--muted);text-align:center}
.lb-rows .nm{font:600 14.5px/1.25 var(--display);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lb-rows .nm em{font-style:normal;color:var(--accent)}
.lb-rows .tm{grid-row:1/3;grid-column:3;font:700 16px/1 var(--display)}
.lb-rows .ex{font-size:12px;color:var(--muted)}
.lb-rows li.p1 .pos{color:var(--star)}
.lb-rows li.p2 .pos,.lb-rows li.p3 .pos{color:var(--ink)}
.lb-rows li.me{outline:2px solid var(--accent);outline-offset:-2px}
.lb-msg{margin:6px 0;color:var(--muted)}
.lb-me{margin:2px 0 0;padding:8px 10px;border-radius:8px;border:1px dashed var(--accent)}
.lb-cnt{margin:2px 0 0;font-size:12.5px;color:var(--muted)}
.lb-prof{border-top:1px solid var(--line);padding-top:12px;display:flex;flex-direction:column;gap:8px}
.lb-prof p{margin:0}
.lb-acts{display:flex;gap:6px 16px;flex-wrap:wrap}
.lnk{border:0;background:none;padding:0;color:var(--accent);font:600 14px/1.4 var(--body);cursor:pointer;text-decoration:underline;text-underline-offset:2px;align-self:flex-start}
.lb-err,.rk-e{margin:0;color:var(--boom);font-size:13.5px;min-height:1em}
.lb-key{font:700 18px/1.3 var(--display);letter-spacing:.06em;padding:10px 12px;border-radius:8px;background:var(--bg2);word-break:break-all;user-select:all}
.lb-page{padding:16px;border-radius:14px;background:var(--panel);border:1px solid var(--line)}
.rankbox{margin:0 0 14px;padding:12px;border-radius:10px;background:var(--bg2);display:flex;flex-direction:column;gap:10px}
.rankbox p{margin:0}
.rankbox .big{background:var(--panel)}
.rankbox .btn{align-self:flex-start}
.rk-t{font:700 15px/1.3 var(--display)}
.rk-n{font-size:14px;color:var(--muted)}
.goal .rk{color:var(--accent);font-weight:700}