:root{
  --bg:#f6f1e7;--bg2:#efe7d7;--ink:#2b2620;--mut:#94897a;--card:#fffdf9;--line:#e6ddcd;
  --ok:#3a8d4f;--ok-ink:#256436;--bad:#c0392b;--accent:#a96a2c;--accent-ink:#8a531d;--hl:#e8b04b;
  --ground:#cdbfa6;--cactus:#3f9d52;--bird:#3b7ddd;--sky:#fffdf9;
}
@media(prefers-color-scheme:dark){:root{
  --bg:#17140f;--bg2:#1e1a13;--ink:#efe9df;--mut:#8c8275;--card:#241f17;--line:#3a3326;
  --ok:#62c47d;--ok-ink:#8ad8a0;--bad:#e07a6c;--accent:#d9a066;--accent-ink:#e8b87f;--hl:#caa23d;
  --ground:#4a4234;--cactus:#5cc173;--bird:#5f9bef;--sky:#1b1710;
}}
*{box-sizing:border-box}
html,body{margin:0}
body{font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;color:var(--ink);
  background:radial-gradient(120% 80% at 50% -10%,var(--bg2),var(--bg));min-height:100vh;
  display:flex;justify-content:center;padding:20px 16px 150px;-webkit-tap-highlight-color:transparent}
.wrap{width:100%;max-width:640px}

header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:4px}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
h1{font-size:clamp(20px,5vw,26px);margin:0;letter-spacing:-.01em}
.tools{display:flex;align-items:center;gap:8px}
.toolbtn{background:var(--card);border:1px solid var(--line);color:var(--accent-ink);border-radius:999px;
  padding:7px 13px;font-size:13px;font-weight:600;cursor:pointer;white-space:nowrap}
.toolbtn:hover{border-color:var(--accent)}
.gc{font:700 13px/1 ui-monospace,monospace;color:#fff;background:var(--accent);text-decoration:none;
  border-radius:999px;padding:7px 12px}
.sub{color:var(--mut);font-size:14.5px;margin:12px 2px 14px}
.sub b{color:var(--ink)}

/* ---- game ---- */
.game{position:relative;background:var(--sky);border:1px solid var(--line);border-radius:16px;
  overflow:hidden;margin:6px 0 12px;box-shadow:0 2px 14px rgba(0,0,0,.05)}
canvas{display:block;width:100%;height:auto;touch-action:none}
.scorebar{position:absolute;top:10px;right:14px;font:800 15px/1 ui-monospace,monospace;color:var(--mut);
  letter-spacing:.02em;user-select:none}
.scorebar .hi-label{font-size:11px;opacity:.7}
.scorebar #hi{margin-right:.5em;opacity:.7}
.scorebar #score{color:var(--accent-ink)}
.progress{position:absolute;left:0;right:0;bottom:0;height:4px;background:transparent}
.progress > i{display:block;height:100%;width:0;background:var(--hl);transition:width .12s linear}
.starthint{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;
  padding:18px;font-size:15px;color:var(--ink);background:rgba(255,253,249,.55);backdrop-filter:blur(1px);
  cursor:pointer;font-weight:600}
@media(prefers-color-scheme:dark){.starthint{background:rgba(27,23,16,.55)}}
.starthint.hide{display:none}
.starthint .k{font:700 12px/1 ui-monospace,monospace;background:var(--card);border:1px solid var(--line);
  border-radius:6px;padding:3px 6px;margin:0 2px;color:var(--accent-ink)}

/* ---- controls (touch) ---- */
.controls{display:flex;gap:10px;margin:0 0 4px}
.controls button{flex:1;border:0;border-radius:14px;padding:16px;font:700 16px system-ui;cursor:pointer;
  color:#fff;box-shadow:0 1px 3px rgba(0,0,0,.18);user-select:none;-webkit-user-select:none;touch-action:manipulation}
#jump{background:var(--accent)}
#duck{background:var(--bg2);color:var(--ink);border:1px solid var(--line)}
#duck:active,#jump:active{transform:scale(.98)}
.controls.gone{display:none}
.keepopt{display:flex;align-items:center;justify-content:center;gap:7px;flex-wrap:wrap;
  margin:2px 2px 6px;font-size:13.5px;color:var(--ink);cursor:pointer}
.keepopt input{width:16px;height:16px;accent-color:var(--accent);cursor:pointer}
.keepopt small{color:var(--mut);font-size:12.5px}
.inlinemsg{text-align:center;min-height:1.2em;margin:2px 2px 10px;color:var(--mut);font-size:14px}
.inlinemsg.bad{color:var(--bad)}
.retry{display:flex;justify-content:center;margin:2px 0 6px}
.retry button{background:var(--accent);color:#fff;border:0;border-radius:12px;padding:12px 22px;font:700 15px system-ui;cursor:pointer}

/* ---- end card ---- */
.end{display:none;text-align:center;background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:22px 18px;margin-top:14px}
.end.show{display:block}
.end h2{margin:.1em 0;font-size:23px;color:var(--ok-ink)}
.end.lose h2{color:var(--bad)}
.end .esub{color:var(--mut);font-size:14px;margin:6px 0 0}
.kw{margin:16px 0 6px}
.kw .label{font:600 11px/1 system-ui;text-transform:uppercase;letter-spacing:.1em;color:var(--mut)}
.kw .val{font:800 clamp(22px,7vw,30px)/1.2 ui-monospace,monospace;letter-spacing:.02em;color:var(--accent-ink);
  margin-top:6px;user-select:all;overflow-wrap:anywhere;word-break:break-word;max-width:100%}
.row2{display:flex;gap:10px;justify-content:center;margin-top:16px;flex-wrap:wrap}
.ghost{background:transparent;color:var(--accent-ink);border:1px solid var(--line);border-radius:11px;
  padding:10px 16px;font-weight:600;cursor:pointer}

/* ---- rules modal ---- */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;align-items:center;justify-content:center;
  padding:18px;z-index:20}
.modal.show{display:flex}
.sheet{background:var(--card);border:1px solid var(--line);border-radius:18px;max-width:440px;width:100%;
  padding:22px;max-height:85vh;overflow:auto}
.sheet h2{margin:0 0 10px;font-size:20px}
.sheet p{font-size:14.5px;color:var(--ink);margin:0 0 10px}
.sheet .close{margin-top:8px;width:100%;border:0;border-radius:12px;padding:12px;background:var(--accent);
  color:#fff;font-weight:700;cursor:pointer}

@media(max-width:430px){ .gc{display:none} }