/* ITZA Chess - app.css. No external fonts or assets; system stack only.
   Chrome palette: deep warm charcoal (chess-room feel) with ITZA gold accents
   and play-green primaries. The board is the hero. */

:root{
  --chrome:#262421; --panel:#312e2b; --elev:#3c3936; --line:#46423e;
  --ink:#e8e6e3; --ink2:#b0ada9; --ink3:#7d7a76;
  --gold:#f5c711; --gold2:#ffd83d;
  --green:#81b64c; --green2:#95c25c;
  --danger:#e02828;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --rad:8px;
}
html[data-contrast="1"]{ --ink:#ffffff; --ink2:#d6d3cf; --ink3:#aaa6a1; --line:#5a554f; }

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--chrome); color:var(--ink);
  font:15px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  min-height:100vh;
}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,select{
  font:inherit;color:var(--ink);background:var(--chrome);
  border:1px solid var(--line);border-radius:6px;padding:8px 10px;outline:none;
}
input:focus,select:focus{border-color:var(--gold)}
html[data-contrast="1"] :focus-visible{outline:2px solid var(--gold);outline-offset:1px}
label{display:block;font-size:13px;color:var(--ink2);margin:10px 0 4px}
h1,h2,h3{margin:0;font-weight:700}
.grow{flex:1}

/* ============================ top bar ============================ */
.topbar{
  display:flex;align-items:center;gap:10px;
  height:52px;padding:0 14px;background:var(--panel);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:30;
}
.pyr{height:30px;width:auto}
.pyr.lg{height:56px}
.brand{font-size:17px;letter-spacing:.2px}
.brand b{color:var(--gold)}
.pill{font-size:11px;padding:2px 9px;border-radius:99px;font-weight:700;text-transform:uppercase;letter-spacing:.4px}
.pill.live{background:rgba(129,182,76,.18);color:var(--green2)}
.pill.demo{background:var(--elev);color:var(--ink3)}
.chip{
  background:var(--elev);border:1px solid var(--line);border-radius:99px;
  padding:5px 13px;font-size:13px;color:var(--ink2);
}
.chip:hover{color:var(--ink)}
.iconbtn{
  font-size:18px;color:var(--ink2);padding:6px 9px;border-radius:6px;line-height:1;
}
.iconbtn:hover{background:var(--elev);color:var(--ink)}

/* ============================ buttons ============================ */
.btn{
  background:var(--elev);border:1px solid var(--line);border-radius:var(--rad);
  padding:10px 18px;font-weight:600;color:var(--ink);
  transition:filter .12s, transform .05s;
}
.btn:hover{filter:brightness(1.12)}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:default}
.btn.gold{background:var(--green);border-color:transparent;color:#fff;box-shadow:0 3px 0 #5d8a35}
.btn.gold:active{box-shadow:0 1px 0 #5d8a35}
.btn.ghost{background:transparent}
.btn.danger{background:transparent;border-color:var(--danger);color:#ff7a6e}
.btn.wide{width:100%}
.btn.sm{padding:5px 12px;font-size:13px;border-radius:6px}
.linklike{color:var(--ink3);text-decoration:underline;font-size:13px;margin-top:14px}
.linklike:hover{color:var(--ink)}

/* ============================ screens ============================ */
.screen{display:none;padding:22px 16px}
.screen.on{display:block}

/* ---------------- onboarding ---------------- */
#screen-onboard.on{display:flex;justify-content:center;align-items:flex-start}
.obcard{
  width:min(430px,94vw);margin-top:5vh;
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:26px;text-align:center;
}
.obhead{display:flex;align-items:center;justify-content:center;gap:14px;margin-bottom:10px}
.obhead h1{font-size:26px}
.tag{color:var(--ink2);font-size:13.5px;margin-bottom:18px;text-align:left}
.obcard label{text-align:left}
.obcard input{width:100%}
.obsep{color:var(--ink3);font-size:12.5px;margin:16px 0 2px}
.feenote{color:var(--ink3);font-size:12px;text-align:left;margin-top:8px}
.mbtns{display:flex;gap:10px;justify-content:flex-end;margin-top:16px}
.mbtns .wide{flex:1}

/* ---------------- home ---------------- */
.homegrid{
  display:flex;gap:34px;justify-content:center;align-items:center;
  max-width:980px;margin:4vh auto 0;flex-wrap:wrap;
}
.homeboard{width:min(480px,92vw);flex:0 1 auto}
#previewBoard{width:100%;border-radius:6px;overflow:hidden;box-shadow:0 10px 34px rgba(0,0,0,.45)}
.homemenu{display:flex;flex-direction:column;gap:14px;width:min(330px,92vw)}
.menubtn{
  text-align:left;background:var(--panel);border:1px solid var(--line);
  border-radius:12px;padding:16px 20px;transition:filter .12s, transform .05s;
}
.menubtn:hover{filter:brightness(1.15)}
.menubtn:active{transform:translateY(1px)}
.menubtn b{display:block;font-size:18px;margin-bottom:2px}
.menubtn span{color:var(--ink2);font-size:13px}
.menubtn.gold{background:var(--green);border-color:transparent;box-shadow:0 4px 0 #5d8a35}
.menubtn.gold b,.menubtn.gold span{color:#fff}
.menubtn.gold span{opacity:.85}

/* ---------------- lobby ---------------- */
.lobbywrap{max-width:640px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.lobbyhead{display:flex;align-items:center;gap:12px}
.lobbyhead h2{font-size:20px}
.lobbyrow{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  background:var(--panel);border:1px solid var(--gold);border-radius:var(--rad);
  padding:10px 14px;font-size:13.5px;color:var(--ink2);
}
.lobbycard{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px}
.lobbycard h3{font-size:15px;margin-bottom:10px;color:var(--ink2)}
.newgame{display:flex;gap:14px;align-items:flex-end;flex-wrap:wrap}
.newgame label{margin:0;display:flex;flex-direction:column;gap:4px}
.newgame .cklbl{flex-direction:row;align-items:center;padding-bottom:9px}
.openRow{
  display:flex;align-items:center;gap:12px;
  padding:9px 6px;border-bottom:1px solid var(--line);font-size:14px;
}
.openRow:last-child{border-bottom:none}
.opName{font-weight:600;min-width:120px}
.opTc{font-family:var(--mono);color:var(--gold)}
.opTags{color:var(--ink3);font-size:12.5px;flex:1}
.mvEmpty{color:var(--ink3);font-size:13px;padding:8px 2px}

/* ---------------- game layout ---------------- */
.gamewrap{
  display:flex;gap:20px;justify-content:center;align-items:flex-start;
  max-width:1100px;margin:0 auto;
}
body.layout-left .gamewrap{flex-direction:row-reverse}
.boardcol{
  width:min(92vw, calc(100vh - 215px), 660px);
  display:flex;flex-direction:column;gap:6px;position:relative;
  padding:0 0 14px 2px;
}
.boardrow{display:flex;gap:8px;align-items:stretch}
#board{flex:1}
.playerbar{
  display:flex;align-items:center;gap:10px;padding:2px 2px;min-height:34px;
}
.pname{font-weight:600;font-size:15px}
.clk{
  font-family:var(--mono);font-size:20px;font-weight:700;
  background:var(--panel);border:1px solid var(--line);border-radius:6px;
  padding:3px 12px;color:var(--ink3);min-width:86px;text-align:center;
}
.clk:empty{display:none}
.clk.run{background:#f4f4f2;color:#161513;border-color:transparent}
.clk.low{background:var(--danger);color:#fff;border-color:transparent}

#confirmBar{
  display:none;position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);
  background:var(--panel);border:1px solid var(--gold);border-radius:10px;
  padding:12px 16px;z-index:25;gap:10px;align-items:center;
  box-shadow:0 8px 30px rgba(0,0,0,.5);font-weight:600;
}
#confirmBar.on{display:flex}

#waitOverlay{
  display:none;position:absolute;inset:0;z-index:24;
  background:rgba(38,36,33,.72);backdrop-filter:blur(2px);
  align-items:center;justify-content:center;border-radius:6px;
}
#waitOverlay.on{display:flex}
.waitbox{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:26px 34px;font-weight:600;
}
.spin{
  width:28px;height:28px;border-radius:50%;
  border:3px solid var(--elev);border-top-color:var(--gold);
  animation:spin 1s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------------- side panel ---------------- */
.panel{
  width:330px;background:var(--panel);border:1px solid var(--line);
  border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:10px;
  max-height:calc(100vh - 100px);
}
.panelhead{display:flex;align-items:center;gap:6px;min-height:30px}
#statusLine{font-size:13.5px;color:var(--ink2);font-weight:600}
#drawBar{display:none;background:var(--elev);border-radius:6px;padding:8px 10px;font-size:13px;align-items:center;gap:8px}
#drawBar.on{display:flex}
#capturedBar{display:flex;flex-direction:column;gap:2px}
.capRow{display:flex;align-items:center;min-height:20px}
.capLbl{font-size:10px;color:var(--ink3);width:14px;font-weight:700}
.capP{width:19px;height:19px;display:inline-block;margin-left:-5px}
.capP svg{width:100%;height:100%}
.capScore{font-size:12px;color:var(--ink2);margin-left:6px;font-family:var(--mono)}
#moveList{
  flex:1;min-height:120px;overflow-y:auto;
  background:var(--chrome);border-radius:6px;padding:8px 10px;
  display:flex;flex-wrap:wrap;align-content:flex-start;gap:2px 4px;
  font-size:14px;
}
.mvno{color:var(--ink3);padding:2px 0 2px 4px;font-family:var(--mono);font-size:12.5px}
.mv{padding:2px 7px;border-radius:4px;cursor:default;font-weight:600}
.mv.cur{background:var(--elev);color:var(--gold2)}
.aids{display:flex;gap:16px;font-size:13px;color:var(--ink2)}
.aids label{display:flex;align-items:center;gap:6px;margin:0}
.ctrls{display:flex;gap:6px;align-items:center;flex-wrap:wrap}

#gameMsg{display:none;background:var(--elev);border-radius:10px;padding:14px;text-align:center}
#gameMsg.on{display:block}
.endHead{font-size:20px;font-weight:800;color:var(--gold)}
.endSub{color:var(--ink2);font-size:13px;margin:2px 0 12px;text-transform:capitalize}
.endBtns{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}

/* ---------------- review ---------------- */
#reviewBox{display:none;flex-direction:column;gap:8px;min-height:0}
#reviewBox.on{display:flex}
.revHead{font-weight:700}
.revProg{font-size:13px;color:var(--ink2)}
.revTime{color:var(--ink3);font-size:11.5px}
.revRows{overflow-y:auto;max-height:240px;display:flex;flex-direction:column}
.revRow{
  display:flex;align-items:center;gap:8px;padding:4px 8px;
  border-left:3px solid transparent;border-radius:4px;cursor:pointer;font-size:13.5px;
}
.revRow:hover{background:var(--elev)}
.revRow.sel{background:var(--elev)}
.rvNo{color:var(--ink3);font-family:var(--mono);font-size:12px;min-width:34px}
.rvSan{font-weight:700;min-width:52px}
.rvBadge{font-size:10.5px;font-weight:700;padding:1px 8px;border-radius:99px;text-transform:uppercase;letter-spacing:.3px}
.rvBest{color:var(--ink3);font-size:12px;margin-left:auto}
.revRow.brill{border-left-color:#26c2a3}.rvBadge.brill{background:rgba(38,194,163,.18);color:#3fd9bb}
.revRow.best{border-left-color:var(--green)}.rvBadge.best{background:rgba(129,182,76,.18);color:var(--green2)}
.revRow.exc{border-left-color:#a3c65b}.rvBadge.exc{background:rgba(163,198,91,.15);color:#b5d472}
.revRow.good{border-left-color:#8f8c88}.rvBadge.good{background:rgba(143,140,136,.16);color:var(--ink2)}
.revRow.inac{border-left-color:#f7c045}.rvBadge.inac{background:rgba(247,192,69,.16);color:#ffd062}
.revRow.mist{border-left-color:#ff9800}.rvBadge.mist{background:rgba(255,152,0,.16);color:#ffb547}
.revRow.blun{border-left-color:#fa412d}.rvBadge.blun{background:rgba(250,65,45,.16);color:#ff6f5e}

/* ---------------- eval bar ---------------- */
#evalWrap{display:flex;flex-direction:column;align-items:center;gap:5px;width:24px}
#evalTrack{
  flex:1;width:13px;background:#141312;border:1px solid var(--line);border-radius:7px;
  overflow:hidden;display:flex;flex-direction:column;justify-content:flex-end;
}
#evalFill{width:100%;height:50%;background:#efefec;transition:height .5s ease}
#evalNum{font-family:var(--mono);font-size:10px;color:var(--ink2);min-height:12px}

/* ============================ the board ============================ */
.cboard{
  position:relative;aspect-ratio:1/1;width:100%;user-select:none;
  touch-action:none;border-radius:5px;overflow:visible;
  box-shadow:0 8px 28px rgba(0,0,0,.45);
}
.cb-squares{
  position:absolute;inset:0;display:grid;
  grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);
  border-radius:5px;overflow:hidden;
}
.cb-sq{position:relative}
.cb-sq::after{content:'';position:absolute;inset:0;pointer-events:none}
.cb-sq.sel::after{background:rgba(255,235,59,.5)}
.cb-sq.pre::after{background:rgba(35,120,255,.4)}
.cb-sq.chk::after{background:radial-gradient(circle,rgba(224,40,40,.9) 18%,rgba(224,40,40,0) 68%)}
.cb-sq.dot::after{
  inset:36%;border-radius:50%;background:rgba(20,18,16,.28);
}
.cb-sq.cap::after{
  inset:3%;border-radius:50%;border:5px solid rgba(20,18,16,.28);background:none;
}
html[data-contrast="1"] .cb-sq.dot::after{background:rgba(0,0,0,.5)}
html[data-contrast="1"] .cb-sq.cap::after{border-color:rgba(0,0,0,.5)}

.cb-pieces{position:absolute;inset:0;pointer-events:none;z-index:3}
.cb-piece{
  position:absolute;left:0;top:0;width:12.5%;height:12.5%;
  will-change:transform;
}
.cb-piece svg{width:100%;height:100%;display:block;filter:drop-shadow(0 1px 1px rgba(0,0,0,.3))}
.cb-piece.drag{z-index:12;filter:drop-shadow(0 6px 8px rgba(0,0,0,.5));transition:none!important}

.cb-arrows{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:6}
.arr{stroke:rgba(129,182,76,.85);stroke-linecap:round}
.arrh{fill:rgba(129,182,76,.85)}
.arr.user{stroke:rgba(255,170,0,.75)}
.arrh.user{fill:rgba(255,170,0,.75)}

.cb-coords{position:absolute;inset:0;pointer-events:none;z-index:4;font-family:var(--mono)}
.cb-coord{position:absolute;font-size:11px;font-weight:700;color:var(--ink3)}
.cb-coord.file.in{bottom:1%;transform:translateX(-2%)}
.cb-coord.rank.in{left:1.6%}
.cb-coord.file:not(.in){top:calc(100% + 3px);transform:translateX(-50%)}
.cb-coord.rank:not(.in){left:-15px;transform:translateY(-50%);margin-top:0}
.cb-coord:not(.in){color:var(--ink3)}

.cb-promo{
  position:absolute;width:12.5%;z-index:20;flex-direction:column;
  background:#f4f4f2;border-radius:5px;box-shadow:0 6px 24px rgba(0,0,0,.55);
  overflow:hidden;
}
.cb-promo button{width:100%;aspect-ratio:1/1;padding:4%}
.cb-promo button:hover{background:var(--gold)}
.cb-promo svg{width:100%;height:100%;display:block}

/* ============================ 3D board ============================ */
.cboard3d{
  position:relative;aspect-ratio:1/1;width:100%;user-select:none;
  touch-action:none;border-radius:8px;overflow:hidden;
  box-shadow:0 10px 34px rgba(0,0,0,.5);
  background:radial-gradient(120% 100% at 50% 0%, #35322e 0%, #1c1a18 70%);
}
.cboard3d canvas{display:block;width:100%!important;height:100%!important}
.c3-promo{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  display:flex;gap:6px;z-index:20;background:#f4f4f2;border-radius:8px;
  padding:8px;box-shadow:0 8px 30px rgba(0,0,0,.55);
}
.c3-promo button{width:56px;height:56px;border-radius:6px}
.c3-promo button:hover{background:var(--gold)}
.c3-promo svg{width:100%;height:100%;display:block}

/* ============================ modal / scrim / toasts ============================ */
.scrim{
  display:none;position:fixed;inset:0;z-index:60;
  background:rgba(10,9,8,.62);align-items:flex-start;justify-content:center;
  overflow-y:auto;padding:6vh 14px;
}
.scrim.on{display:flex}
.modal{
  width:min(460px,94vw);background:var(--panel);
  border:1px solid var(--line);border-radius:14px;padding:22px;
  box-shadow:0 14px 50px rgba(0,0,0,.6);
}
.mhead{font-size:18px;font-weight:700;margin-bottom:6px}
.modal select,.modal input[type=text],.modal input[type=number]{width:100%}
.lvlRow{display:flex;align-items:center;gap:12px}
.lvlRow input{flex:1}
.lvlRow span{font-family:var(--mono);font-size:18px;font-weight:700;color:var(--gold);min-width:20px;text-align:center}
.setList{display:flex;flex-direction:column}
.setRow{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:8px 0;border-bottom:1px solid var(--line);font-size:14px;
}
.setRow:last-child{border-bottom:none}
.setRow select{width:auto;min-width:120px}
.setRow input[type=text]{max-width:220px}
.setRow input[type=number]{width:90px}
.setRow input[type=range]{width:140px}
.setRow input[type=checkbox]{width:18px;height:18px;accent-color:var(--green)}
.logPre{
  max-height:50vh;overflow:auto;background:var(--chrome);border-radius:6px;
  padding:10px;font-size:11px;line-height:1.5;white-space:pre-wrap;word-break:break-all;
}

#toasts{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);z-index:90;display:flex;flex-direction:column;gap:8px;align-items:center}
.toast{
  background:var(--elev);border:1px solid var(--line);color:var(--ink);
  border-radius:99px;padding:9px 20px;font-size:13.5px;font-weight:600;
  box-shadow:0 6px 22px rgba(0,0,0,.45);animation:tin .18s ease;max-width:88vw;
}
@keyframes tin{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
#verTag{position:fixed;left:10px;bottom:8px;font-size:10px;color:var(--ink3);z-index:5}

/* ============================ responsive ============================ */
@media (max-width:920px){
  .gamewrap{flex-direction:column;align-items:center}
  body.layout-left .gamewrap{flex-direction:column}
  .panel{width:min(92vw,660px);max-height:none}
  .boardcol{width:min(94vw, calc(100vh - 265px), 660px)}
  .homegrid{margin-top:2vh}
}
@media (max-width:520px){
  .screen{padding:14px 8px}
  .clk{font-size:17px;min-width:74px}
  .newgame{gap:10px}
}