:root{
  --bg:#0b1512; --panel:#14231e; --edge:#28413a; --ink:#e8f2ee; --dim:#9fb8b0;
  --accent:#7fd6b0; --warm:#f5c24a; --shadow:0 6px 24px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
/* an id rule with display: (e.g. #glfail{display:grid}) beats the UA [hidden] rule, which left an
   opaque, empty #glfail panel over the whole court */
[hidden]{display:none!important}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);
  font:15px/1.5 "Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  -webkit-text-size-adjust:100%}
#wrap{max-width:1180px;margin:0 auto;padding:10px 12px 22px;display:flex;flex-direction:column;gap:10px}
#top{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px}
h1{margin:0;font-size:24px;letter-spacing:.02em;font-weight:650}
#topbar{margin-left:auto;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
#games{color:var(--dim);font-variant-numeric:tabular-nums;margin-right:6px}
button,select{background:var(--panel);color:var(--ink);border:1px solid var(--edge);
  border-radius:8px;padding:7px 12px;font:inherit;cursor:pointer}
button:hover,select:hover{border-color:var(--accent)}
button:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button[aria-pressed="true"]{background:var(--accent);color:#08201a;border-color:var(--accent);font-weight:600}
#stage{position:relative;width:100%;aspect-ratio:16/9;min-height:280px;border-radius:12px;
  overflow:hidden;background:#8ea7bd;box-shadow:var(--shadow)}
#glcanvas{display:block;width:100%;height:100%;touch-action:none;-webkit-user-select:none;user-select:none}
#glfail{position:absolute;inset:0;display:grid;place-items:center;margin:0;padding:24px;
  text-align:center;background:var(--panel);color:var(--ink)}
#hud{position:absolute;inset:0;pointer-events:none;display:flex;justify-content:space-between;
  align-items:flex-start;padding:12px;gap:12px}
#scoreBox{background:rgba(8,20,17,.62);border:1px solid rgba(127,214,176,.25);border-radius:10px;
  padding:8px 14px;backdrop-filter:blur(3px)}
#scoreMain{font-size:34px;font-weight:700;font-variant-numeric:tabular-nums;line-height:1.05}
#scoreWho{font-size:12px;color:var(--accent);text-transform:uppercase;letter-spacing:.08em}
#serveCourt{font-size:12px;color:var(--dim);margin-top:3px}
#statBox{background:rgba(8,20,17,.62);border:1px solid rgba(127,214,176,.18);border-radius:10px;
  padding:8px 12px;font-size:13px;min-width:170px}
#statBox div{display:flex;justify-content:space-between;gap:12px;font-variant-numeric:tabular-nums}
#statBox .k{color:var(--dim)}
#msg{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);margin:0;
  background:rgba(8,20,17,.78);border:1px solid var(--edge);border-radius:999px;
  padding:7px 18px;font-size:14px;color:var(--ink);pointer-events:none;white-space:nowrap}
#toast{position:absolute;left:50%;top:16px;transform:translateX(-50%);
  background:var(--accent);color:#08201a;border-radius:999px;padding:6px 16px;font-weight:600}
#pad{display:flex;flex-wrap:wrap;gap:8px}
#pad button{flex:1 1 130px}
#btnServe{flex:1 1 190px;background:var(--warm);color:#241a00;border-color:var(--warm);font-weight:650}
#foot{margin:0;color:var(--dim);font-size:12px;font-variant-numeric:tabular-nums}
.dlg{position:fixed;inset:0;z-index:40;background:rgba(4,10,9,.72);
  display:flex;align-items:flex-start;justify-content:center;padding:18px;overflow:auto}
.dlg[hidden]{display:none!important}
.dlgInner{background:var(--panel);border:1px solid var(--edge);border-radius:14px;
  padding:20px 22px 24px;max-width:760px;width:100%;box-shadow:var(--shadow)}
.dlgInner h2{margin:0 0 8px;font-size:21px}
.dlgInner h3{margin:20px 0 6px;font-size:16px;color:var(--accent)}
.dlgInner p{margin:8px 0}
.lead{color:var(--dim)}
.keys,.laws{margin:8px 0;padding-left:20px}
.keys li,.laws li{margin:5px 0}
.num{color:var(--warm);font-variant-numeric:tabular-nums}
.fine{font-size:13px;color:var(--dim)}
.dlgInner label{display:block;margin:12px 0 4px;color:var(--dim);font-size:13px}
.dlgInner select{width:100%;max-width:280px}
.dlgInner input[type=checkbox]{margin-right:8px;accent-color:var(--accent)}
.dlgInner a{color:var(--accent)}
.dlgInner button{margin-top:18px}
@media (max-width:720px){
  h1{font-size:20px}
  #stage{aspect-ratio:4/3}
  #scoreMain{font-size:26px}
  #statBox{min-width:0;font-size:12px}
}
/* phones: the HUD sits over the far court, so drop the two rows the pad and the score already
   carry (selected stroke, shuttle speed) and keep the boxes short */
@media (max-width:480px){
  #statBox div:nth-child(3),#statBox div:nth-child(5){display:none}
  #hud{padding:8px}
  #scoreBox,#statBox{padding:6px 10px}
  #statBox{flex:none}
  #scoreBox{min-width:0}
}
/* .open is added by ui.js when a dialog or the toast is shown; [hidden] above still wins for
   hiding, so the class only carries the entrance. */
.dlg.open .dlgInner{animation:rise .16s ease-out}
#toast.open{animation:fade .16s ease-out}
@keyframes rise{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}to{opacity:1}}
@media (prefers-reduced-motion:reduce){.dlg.open .dlgInner,#toast.open{animation:none}}