/* Premium Canvas Chess — clean, modern, offline */

:root{
  --bg0:#0b1020;
  --bg1:#0f1730;
  --card:#121b35;
  --card2:#0f1730;
  --text:#e8ecff;
  --muted:#aeb6dc;
  --line:rgba(255,255,255,.10);
  --accent:#7c5cff;
  --accent2:#2dd4bf;
  --danger:#ff4d6d;
  --shadow: 0 14px 50px rgba(0,0,0,.45);
  --radius: 18px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background:
    radial-gradient(1200px 700px at 20% -10%, rgba(124,92,255,.35), transparent 60%),
    radial-gradient(1200px 700px at 110% 10%, rgba(45,212,191,.22), transparent 60%),
    linear-gradient(180deg, var(--bg0), var(--bg1));
}

#app{min-height:100%; display:flex; flex-direction:column}
.topbar{
  display:flex; gap:14px; align-items:center; justify-content:space-between;
  padding:18px 18px 12px;
  border-bottom: 1px solid var(--line);
}

.brand{display:flex; gap:12px; align-items:center}
.logo{
  width:40px;height:40px;border-radius:12px;
  background:
    radial-gradient(14px 14px at 30% 28%, rgba(255,255,255,.65), rgba(255,255,255,0) 60%),
    linear-gradient(145deg, rgba(124,92,255,1), rgba(45,212,191,1));
  box-shadow: 0 8px 30px rgba(124,92,255,.25);
}
.title .name{font-weight:800; letter-spacing:.3px}
.title .sub{font-size:12px; color:var(--muted); margin-top:2px}

.status{display:flex; gap:10px; align-items:center}
.pill{
  padding:8px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  font-size:12px;
  color: var(--text);
  backdrop-filter: blur(8px);
}
.pill-secondary{color:var(--muted)}

.actions{display:flex; gap:8px; flex-wrap:wrap; justify-content:flex-end}
.btn{
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  color:var(--text);
  cursor:pointer;
  transition: transform .08s ease, background .2s ease, border-color .2s ease;
  font-weight:650;
}
.btn:hover{background: rgba(255,255,255,.07); border-color:rgba(255,255,255,.18)}
.btn:active{transform: translateY(1px)}
.btn-secondary{color:var(--muted)}
.btn-primary{
  background: linear-gradient(135deg, rgba(124,92,255,1), rgba(45,212,191,1));
  border: none;
  box-shadow: 0 14px 45px rgba(124,92,255,.25);
}
.btn-big{padding:12px 16px; border-radius:14px}

.layout{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap:16px;
  padding:16px;
  width:min(1200px, 100%);
  margin:0 auto;
}

.boardCard,.sideCard{
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.03));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow:hidden;
}

.canvasWrap{
  padding:14px;
  position:relative;
}
#board{
  width:100%;
  height:auto;
  border-radius: 16px;
  background: rgba(0,0,0,.18);
  display:block;
  touch-action: none;
}

.toast{
  position:absolute;
  left:50%;
  transform: translateX(-50%);
  bottom:18px;
  padding:10px 14px;
  border-radius: 999px;
  border:1px solid var(--line);
  background: rgba(0,0,0,.45);
  color: var(--text);
  font-size: 12px;
  opacity:0;
  pointer-events:none;
  transition: opacity .25s ease, transform .25s ease;
}
.toast.show{
  opacity:1;
  transform: translateX(-50%) translateY(-4px);
}

.underBoard{
  border-top:1px solid var(--line);
  padding:12px 14px 14px;
  display:grid;
  grid-template-columns: .9fr 1.1fr;
  gap:12px;
}

.meta{
  border:1px solid var(--line);
  background: rgba(0,0,0,.16);
  border-radius: 14px;
  padding:12px;
}
.metaRow{display:flex; justify-content:space-between; gap:10px; padding:7px 0}
.label{color:var(--muted); font-size:12px}
.value{font-weight:700}

.captured{
  border:1px solid var(--line);
  background: rgba(0,0,0,.16);
  border-radius: 14px;
  padding:12px;
}
.capTitle{font-weight:800; margin-bottom:8px}
.capRows{display:grid; gap:10px}
.capRow{display:flex; justify-content:space-between; gap:12px; align-items:center}
.capSide{color:var(--muted); font-size:12px; width:52px}
.capPieces{display:flex; gap:6px; flex-wrap:wrap; justify-content:flex-end}
.capPieces .capPiece{
  width:18px;height:18px;border-radius:6px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  display:grid; place-items:center;
  font-size:12px;
}

.sideCard{display:flex; flex-direction:column; min-height:0}
.panelHead{
  padding:14px 14px 12px;
  display:flex; justify-content:space-between; align-items:baseline;
  border-bottom:1px solid var(--line);
}
.panelHead2{border-top:1px solid var(--line)}
.panelTitle{font-weight:900}
.panelHint{color:var(--muted); font-size:12px}

.movelist{
  padding:8px 12px 12px;
  overflow:auto;
  min-height: 280px;
  max-height: 55vh;
}
.moveRow{
  display:grid;
  grid-template-columns: 34px 1fr 1fr;
  gap:10px;
  padding:8px 8px;
  border-radius:12px;
  border:1px solid transparent;
}
.moveRow:nth-child(odd){background: rgba(255,255,255,.03)}
.moveRow:hover{border-color: rgba(255,255,255,.12)}
.moveNo{color:var(--muted); font-size:12px}
.moveSan{font-weight:750}
.moveSan.muted{color:var(--muted); font-weight:650}

.settings{
  padding:10px 14px 14px;
  display:grid;
  gap:10px;
}
.settingRow{
  display:flex; justify-content:space-between; align-items:center;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:14px;
  background: rgba(0,0,0,.14);
  color: var(--text);
}
.settingRow span{font-weight:750}
.settingRow input{transform:scale(1.1)}

.footnote{
  margin-top:auto;
  padding:12px 14px 14px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--line);
}

.modal{
  position:fixed;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:18px;
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(10px);
  z-index: 50;
}
.modalCard{
  width: min(720px, 100%);
  border-radius: 20px;
  border:1px solid rgba(255,255,255,.12);
  background:
    radial-gradient(700px 420px at 30% 0%, rgba(124,92,255,.20), transparent 70%),
    radial-gradient(700px 420px at 110% 10%, rgba(45,212,191,.16), transparent 70%),
    linear-gradient(180deg, rgba(18,27,53,.92), rgba(12,18,39,.92));
  box-shadow: 0 22px 70px rgba(0,0,0,.55);
  padding: 18px;
}
.modalTitle{font-weight:950; font-size:20px}
.modalSubtitle{color:var(--muted); margin-top:6px; font-size:13px; line-height:1.35}

.grid2{display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-top:16px}
.block{
  border:1px solid var(--line);
  border-radius: 16px;
  padding: 12px;
  background: rgba(0,0,0,.14);
}
.blockTitle{font-weight:850; margin-bottom:10px}
.seg{display:flex; gap:8px; flex-wrap:wrap}
.segBtn{
  flex:1;
  min-width: 120px;
  padding:10px 12px;
  border-radius: 14px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  color: var(--text);
  cursor:pointer;
  font-weight:800;
  transition: transform .08s ease, background .2s ease, border-color .2s ease;
}
.segBtn:hover{background: rgba(255,255,255,.07); border-color: rgba(255,255,255,.18)}
.segBtn:active{transform: translateY(1px)}
.segBtn.active{
  border-color: rgba(124,92,255,.65);
  box-shadow: 0 0 0 3px rgba(124,92,255,.16) inset;
  background: rgba(124,92,255,.16);
}

.optRow{
  display:flex; gap:10px; align-items:center;
  color: var(--text);
  font-weight:750;
}
.optRow input{transform:scale(1.1)}

.modalActions{
  display:flex; justify-content:flex-end;
  margin-top: 14px;
}
.modalFine{margin-top:12px; color:var(--muted); font-size:12px}

.promoRow{display:flex; gap:10px; margin-top:14px; flex-wrap:wrap}
.promoBtn{
  flex:1;
  min-width: 140px;
  padding:12px 12px;
  border-radius: 14px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  color: var(--text);
  cursor:pointer;
  font-weight:900;
}
.promoBtn:hover{background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.20)}

@media (max-width: 980px){
  .layout{grid-template-columns: 1fr; }
  .movelist{max-height: 34vh;}
  .actions{justify-content:flex-start}
}