/* ============================================================
   Gambit — a chess set that looks like an object you own.
   Aubergine and gold, warm rather than clinical, glass panels
   over an ambient glow.
   ============================================================ */
:root{
  --void:#150B1A;
  --plum:#2A1430;
  --plum-2:#3A1C42;
  --wine:#6B2F52;
  --ivory:#F2E6D2;
  --ivory-2:#E4D3B8;
  --gold:#D8A94E;
  --gold-2:#F0CC84;
  --gold-dim:rgba(216,169,78,.28);
  --text:#F5EDE2;
  --muted:#B9A7BE;
  --dim:#8B7A93;
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.09);
  --edge:rgba(240,204,132,.16);
  --edge-2:rgba(240,204,132,.30);
  --good:#63C79A;
  --warn:#E8895A;

  --display:'Fraunces',Georgia,serif;
  --ui:'Jost',system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}

body{
  margin:0;min-height:100vh;color:var(--text);font-family:var(--ui);font-size:16px;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
  background:
    radial-gradient(1000px 700px at 12% -10%, rgba(107,47,82,.55), transparent 60%),
    radial-gradient(900px 640px at 100% 108%, rgba(216,169,78,.13), transparent 58%),
    linear-gradient(160deg, var(--void), var(--plum) 55%, #1B0E20);
  background-attachment:fixed;
}

/* ---------- shell ---------- */
.shell{max-width:1280px;margin:0 auto;padding:clamp(16px,3vw,34px)}
.top{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:clamp(16px,2.4vw,26px)}
.brand{font-family:var(--display);font-weight:600;font-size:clamp(28px,4vw,40px);
  letter-spacing:-.02em;margin:0;line-height:1}
.brand em{font-style:italic;color:var(--gold-2)}
.tag{font-size:13.5px;color:var(--dim);letter-spacing:.04em}
.top-right{margin-left:auto;display:flex;gap:10px;align-items:center;flex-wrap:wrap}

.game{display:grid;grid-template-columns:1fr;gap:clamp(16px,2.2vw,26px);align-items:start}

/* ---------- the board ---------- */
.board-wrap{
  position:relative;padding:clamp(16px,2.2vw,26px);border-radius:20px;
  background:linear-gradient(150deg, rgba(240,204,132,.16), rgba(240,204,132,.04) 40%, transparent 70%), var(--glass);
  border:1px solid var(--edge);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 30px 70px -30px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.07);
}
.board{
  position:relative;display:grid;grid-template-columns:repeat(8,1fr);
  aspect-ratio:1;width:100%;border-radius:8px;overflow:hidden;
  box-shadow:0 0 0 1.5px var(--gold-dim), 0 18px 40px -18px rgba(0,0,0,.85);
  touch-action:manipulation;
}
.sq{position:relative;display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:background .16s}
.sq.l{background:linear-gradient(155deg,#F6EBD8,#EADCC2)}
.sq.d{background:linear-gradient(155deg,#7E4064,#63304E)}
.sq.last::after{content:"";position:absolute;inset:0;background:rgba(216,169,78,.30);pointer-events:none}
.sq.sel::after{content:"";position:absolute;inset:0;background:rgba(216,169,78,.46);pointer-events:none}
.sq.over::after{content:"";position:absolute;inset:0;pointer-events:none;
  box-shadow:inset 0 0 0 4px var(--gold);background:rgba(216,169,78,.2)}
.sq.check::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 50% 50%, rgba(236,90,90,.8), transparent 68%)}

/* Legal moves need to be obvious at a glance — the previous dots were too
   faint to play from quickly. */
.sq .dot{position:absolute;width:30%;height:30%;border-radius:50%;pointer-events:none;
  background:rgba(28,12,32,.36);box-shadow:0 1px 3px rgba(0,0,0,.25)}
.sq.l .dot{background:rgba(90,40,70,.34)}
.sq.cap .dot{width:92%;height:92%;background:none;border-radius:50%;
  border:6px solid rgba(28,12,32,.34);box-shadow:none}
.sq.l.cap .dot{border-color:rgba(90,40,70,.32)}

.pc{width:88%;height:88%;display:flex;align-items:center;justify-content:center;
  cursor:grab;user-select:none;-webkit-user-drag:element;
  filter:drop-shadow(0 3px 4px rgba(0,0,0,.42));
  transition:transform .16s cubic-bezier(.2,.9,.3,1)}
.pc svg{width:100%;height:100%;display:block;pointer-events:none}
.pc:active{cursor:grabbing}
.pc.dragging{opacity:.32}
.pc.ghost{filter:drop-shadow(0 8px 14px rgba(0,0,0,.6))}
.sq.sel .pc{transform:scale(1.06)}
.sq:hover .pc{transform:scale(1.04)}

.coords{position:absolute;inset:0;pointer-events:none}
.coords span{position:absolute;font-family:var(--ui);font-size:11px;font-weight:600;
  letter-spacing:.06em;color:var(--gold);opacity:.75}
.coords .f{bottom:4px}
.coords .r{left:5px}

/* ---------- panels ---------- */
.panel{
  background:var(--glass);border:1px solid var(--edge);border-radius:18px;
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 20px 50px -30px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
}
.panel + .panel{margin-top:16px}
.panel-h{padding:15px 18px 13px;border-bottom:1px solid var(--edge);
  display:flex;align-items:center;gap:10px}
.panel-h h2{font-family:var(--display);font-size:17px;font-weight:600;margin:0;letter-spacing:-.01em}
.panel-b{padding:16px 18px}

.status{font-family:var(--display);font-size:19px;font-weight:600;line-height:1.3}
.status.think{color:var(--gold-2)}
.status.over{color:var(--warn)}
.status-sub{font-size:14px;color:var(--muted);margin-top:5px;min-height:1.2em}

.trays{display:flex;flex-direction:column;gap:10px}
.tray{display:flex;align-items:center;gap:8px;min-height:34px;flex-wrap:wrap}
.tray .who{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);
  width:52px;flex:none}
.tray .g{font-size:23px;line-height:1}
.tray .g.w{color:#FBF4E6;text-shadow:0 1px 2px rgba(0,0,0,.5)}
.tray .g.b{color:#3A1B40;text-shadow:0 1px 0 rgba(255,255,255,.14)}
.tray .adv{margin-left:auto;font-size:13px;color:var(--gold-2);font-weight:600}

.moves{max-height:230px;overflow-y:auto;font-size:14.5px;
  display:grid;grid-template-columns:34px 1fr 1fr;gap:2px 8px;align-content:start}
.moves .n{color:var(--dim);font-size:13px}
.moves .m{padding:3px 7px;border-radius:6px;cursor:default}
.moves .m.now{background:rgba(216,169,78,.2);color:var(--gold-2);font-weight:600}
.moves::-webkit-scrollbar{width:7px}
.moves::-webkit-scrollbar-thumb{background:rgba(240,204,132,.22);border-radius:9px}

.coach{font-size:15px;line-height:1.6;color:var(--text);min-height:52px}
.coach .quiet{color:var(--dim);font-style:italic}
.coach.load{color:var(--gold-2)}

/* ---------- controls ---------- */
.btn{
  font-family:var(--ui);font-size:14.5px;font-weight:600;letter-spacing:.02em;
  padding:11px 18px;border-radius:11px;cursor:pointer;min-height:44px;
  color:var(--text);background:var(--glass-2);border:1px solid var(--edge-2);
  transition:all .16s;
}
.btn:hover{background:rgba(240,204,132,.16);border-color:var(--gold);color:#fff;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}
.btn.gold{background:linear-gradient(120deg,var(--gold),#B98A34);border-color:transparent;color:#2A1430;font-weight:700}
.btn.gold:hover{filter:brightness(1.08);color:#1A0C1E}
.btns{display:flex;gap:9px;flex-wrap:wrap}

.sel-wrap{display:flex;flex-direction:column;gap:6px}
label.lbl{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim)}
select{
  font-family:var(--ui);font-size:15px;padding:11px 14px;border-radius:11px;min-height:44px;
  color:var(--text);background:rgba(42,20,48,.9);border:1px solid var(--edge-2);cursor:pointer;
}
select:focus-visible,.btn:focus-visible,.sq:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
option{background:#2A1430;color:var(--text)}

/* ---------- promotion ---------- */
.scrim{position:fixed;inset:0;z-index:60;display:grid;place-items:center;padding:20px;
  background:rgba(12,6,16,.76);backdrop-filter:blur(8px);opacity:0;pointer-events:none;transition:opacity .2s}
.scrim.on{opacity:1;pointer-events:auto}
.promo{background:linear-gradient(150deg,var(--plum-2),var(--plum));border:1px solid var(--edge-2);
  border-radius:20px;padding:26px 28px;text-align:center;box-shadow:0 30px 70px -20px rgba(0,0,0,.9)}
.promo h3{font-family:var(--display);font-size:21px;margin:0 0 16px;font-weight:600}
.promo .row{display:flex;gap:10px}
.promo button{width:66px;height:66px;font-size:38px;line-height:1;border-radius:14px;cursor:pointer;
  background:var(--glass-2);border:1px solid var(--edge-2);color:#FBF4E6;transition:all .15s}
.promo button:hover{background:rgba(240,204,132,.2);border-color:var(--gold);transform:translateY(-2px)}

@media(min-width:900px){
  .game{grid-template-columns:minmax(0,1fr) 340px}
  .pc{font-size:min(4.6vw,60px)}
}
@media(min-width:1180px){ .game{grid-template-columns:minmax(0,1fr) 370px} }

/* ---------- how to play ---------- */
.help-card{width:min(760px,94vw);max-height:88vh;display:flex;flex-direction:column;
  background:linear-gradient(155deg,var(--plum-2),var(--plum));border:1px solid var(--edge-2);
  border-radius:22px;box-shadow:0 40px 90px -30px rgba(0,0,0,.95)}
.help-top{display:flex;align-items:center;gap:14px;padding:20px 22px 16px;border-bottom:1px solid var(--edge)}
.help-top h3{font-family:var(--display);font-size:22px;font-weight:600;margin:0;flex:1}
.help-tabs{display:flex;gap:6px;padding:14px 22px 0}
.ht{font-family:var(--ui);font-size:14px;font-weight:600;padding:9px 15px;border-radius:10px;
  cursor:pointer;background:transparent;border:1px solid transparent;color:var(--muted);transition:all .15s}
.ht:hover{color:var(--text)}
.ht.on{background:rgba(240,204,132,.15);border-color:var(--edge-2);color:var(--gold-2)}
.help-body{overflow-y:auto;padding:16px 22px 24px}
.help-lede{font-size:14.5px;color:var(--muted);margin:0 0 18px;display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.key{display:inline-flex;align-items:center;gap:7px;font-size:13.5px}
.key i{width:13px;height:13px;border-radius:50%;display:inline-block}
.k-go{background:rgba(240,204,132,.85)}
.k-take{background:none;border:3px solid rgba(236,120,120,.9)}

.hrow{display:flex;gap:18px;align-items:flex-start;padding:16px 0;border-bottom:1px solid var(--edge)}
.hrow:last-child{border-bottom:0}
.hgrid{display:grid;grid-template-columns:repeat(5,1fr);width:172px;flex:none;
  border-radius:7px;overflow:hidden;box-shadow:0 0 0 1px var(--gold-dim)}
.hc{aspect-ratio:1;position:relative;display:flex;align-items:center;justify-content:center}
.hc.l{background:#EADCC2}.hc.d{background:#7E4064}
.hc i{width:34%;height:34%;border-radius:50%;background:rgba(240,204,132,.9);
  box-shadow:0 0 0 1px rgba(90,40,20,.35)}
.hc.take i{background:none;border:3px solid rgba(236,120,120,.95);width:64%;height:64%;box-shadow:none}
.hc.first i{opacity:.5}
.hp{width:86%;height:86%}
.hp svg{width:100%;height:100%;filter:drop-shadow(0 2px 3px rgba(0,0,0,.4))}
.hinfo{flex:1;min-width:0}
.hinfo h4{font-family:var(--display);font-size:18px;font-weight:600;margin:0 0 5px}
.hinfo h4 span{font-family:var(--ui);font-size:12.5px;font-weight:500;color:var(--gold);
  margin-left:9px;letter-spacing:.03em}
.hinfo p{margin:0;font-size:14.5px;line-height:1.6;color:var(--muted)}
.hitem{padding:14px 0;border-bottom:1px solid var(--edge)}
.hitem:last-child{border-bottom:0}
.hitem h4{font-family:var(--display);font-size:17px;font-weight:600;margin:0 0 5px}
.hitem p{margin:0;font-size:14.5px;line-height:1.6;color:var(--muted)}
@media(max-width:620px){
  .hrow{flex-direction:column;gap:12px}
  .hgrid{width:132px}
}