/* Based on Domino RD styling */
:root{
  --bg:#0b1220;
  --card:rgba(255,255,255,0.06);
  --stroke:rgba(255,255,255,0.14);
  --text:#e7ebff;
  --muted:rgba(231,235,255,0.68);
  --accent:#7c5cff;
  --good:#12b981;
  --warn:#f59e0b;
  --bad:#ff5a78;
  --shadow:0 18px 50px rgba(0,0,0,0.45);
  --p0-fill: rgba(255,92,122,0.92);
  --p1-fill: rgba(91,240,178,0.90);
}

:root[data-palette="rg"]{
  --p0-fill: rgba(255,92,122,0.92);
  --p1-fill: rgba(91,240,178,0.90);
}
:root[data-palette="bo"]{
  --p0-fill: rgba(79,124,255,0.92);
  --p1-fill: rgba(245,158,11,0.92);
}
:root[data-palette="py"]{
  --p0-fill: rgba(124,92,255,0.92);
  --p1-fill: rgba(255,215,0,0.92);
}
:root[data-palette="bw"]{
  --p0-fill: rgba(245,245,245,0.92);
  --p1-fill: rgba(45,45,45,0.92);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}
input,textarea,[contenteditable]{-webkit-user-select:text;user-select:text}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:radial-gradient(900px 600px at 20% 10%, rgba(124,92,255,.25), transparent 55%),
             radial-gradient(900px 700px at 80% 0%, rgba(18,185,129,.22), transparent 60%),
             radial-gradient(1000px 700px at 60% 100%, rgba(79,124,255,.18), transparent 60%),
             var(--bg);
  color:var(--text);
  min-height:100svh;
  display:flex;
  flex-direction:column;
  overflow:hidden;
}
a{color:inherit}

.legalBar{
  position:sticky;
  top:0;
  z-index:3;
  display:flex;
  gap:10px;
  align-items:center;
  justify-content:center;
  padding:10px 14px;
  font-size:13px;
  color:rgba(231,235,255,0.78);
  background:rgba(0,0,0,0.42);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,0.10);
  flex:0 0 auto;
}
.legalBar .sep{opacity:.5}
.app-root{
  width:100%;
  max-width:1100px;
  margin:0 auto;
  padding:clamp(10px, 2vmin, 18px);
  flex:1 1 auto;
  min-height:0;
  display:flex;
  overflow:hidden;
}
.app-root > .screen{flex:1 1 auto; min-height:0}

.screen{display:flex;flex-direction:column;gap:14px;min-height:0;overflow:auto}
.screen.screen-offline,
.screen.screen-onlineGame{overflow:hidden}
.card{
  border:1px solid var(--stroke);
  background:var(--card);
  border-radius:18px;
  padding:16px;
  box-shadow:var(--shadow);
  min-height:0;
}
.row{display:flex;gap:10px;align-items:center}
.row.wrap{flex-wrap:wrap}
.row.space{justify-content:space-between}
.title{font-weight:900;font-size:26px;letter-spacing:-0.02em}
.subtitle{color:var(--muted)}
.muted{color:var(--muted)}
.small{font-size:13px}
.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,0.14);
  background:rgba(0,0,0,0.18);
  color:rgba(231,235,255,0.9);
  font-size:13px;
}
.pill.thinking-pill{
  border-color:rgba(124,92,255,0.55);
  background:rgba(124,92,255,0.22);
}
.spinner{
  width:12px;
  height:12px;
  border-radius:999px;
  border:2px solid rgba(231,235,255,0.35);
  border-top-color:rgba(231,235,255,0.9);
  display:inline-block;
  animation:spin 0.9s linear infinite;
}
@media (prefers-reduced-motion: reduce){
  .spinner{animation:none}
}
@keyframes spin{to{transform:rotate(360deg)}}
.btn{
  border:1px solid rgba(255,255,255,0.16);
  background:rgba(255,255,255,0.08);
  color:var(--text);
  border-radius:12px;
  padding:10px 12px;
  cursor:pointer;
  font-weight:700;
}
.btn:hover{background:rgba(255,255,255,0.11)}
.btn.primary{background:rgba(124,92,255,0.32);border-color:rgba(124,92,255,0.55)}
.btn.good{background:rgba(18,185,129,0.22);border-color:rgba(18,185,129,0.55)}
.btn.danger{background:rgba(255,90,120,0.20);border-color:rgba(255,90,120,0.45)}
.btn.ghost{background:transparent}
.btn:disabled{opacity:.55;cursor:not-allowed}

.modebar{
  display:flex;
  gap:8px;
  padding:6px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,0.12);
  background:rgba(255,255,255,0.05);
}
.modebar .btn{
  flex:1 1 0;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
}
.modebar .btn[aria-selected="true"]{
  background:rgba(124,92,255,0.32);
  border-color:rgba(124,92,255,0.55);
}

.field{display:flex;flex-direction:column;gap:6px;min-width:220px}
.field input{
  padding:10px 12px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,0.14);
  background:rgba(0,0,0,0.22);
  color:var(--text);
  outline:none;
}
.field select{
  padding:10px 12px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,0.14);
  background:rgba(0,0,0,0.22);
  color:var(--text);
  outline:none;
}

.board-wrap{
  display:flex;
  flex-direction:column;
  gap:14px;
  flex:1 1 auto;
  min-height:0;
  align-items:stretch;
}
.board-wrap[data-side="collapsed"] > .side-panel{display:none}
@media (min-width: 980px){
  .board-wrap{flex-direction:row}
  .board-wrap > .card.checkers{flex:1.2 1 0}
  .board-wrap > .side-panel{flex:0.8 1 0}
}

.checkers{
  display:flex;
  align-items:center;
  justify-content:center;
  padding:12px;
  flex:1 1 auto;
  min-height:0;
}
.checkers-board{
  width:min(560px, 100%);
  height:auto;
  aspect-ratio:1/1;
  display:grid;
  grid-template-columns:repeat(8, 1fr);
  grid-template-rows:repeat(8, 1fr);
  border-radius:18px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,0.14);
  background:rgba(255,255,255,0.04);
  box-shadow:0 22px 70px rgba(0,0,0,0.45);
  max-width:100%;
  max-height:100%;
}
.sq{
  position:relative;
  border:0;
  padding:0;
  display:grid;
  place-items:center;
  cursor:pointer;
  aspect-ratio:1/1;
}
.sq.light{background:rgba(255,255,255,0.06)}
.sq.dark{background:rgba(0,0,0,0.22)}
.sq.hint{outline:3px solid rgba(18,185,129,0.65); outline-offset:-3px}
.sq.sel{outline:3px solid rgba(124,92,255,0.75); outline-offset:-3px}
.sq.cap{outline:3px solid rgba(245,158,11,0.75); outline-offset:-3px}
.sq.fromhint::after{
  content:"";
  position:absolute;
  inset:6px;
  border:2px dashed rgba(231,235,255,0.28);
  border-radius:12px;
  pointer-events:none;
}
.piece{
  width:68%;
  height:68%;
  border-radius:999px;
  box-shadow:0 14px 24px rgba(0,0,0,0.45);
  border:2px solid rgba(255,255,255,0.16);
  display:grid;
  place-items:center;
}
.piece.p0{background:radial-gradient(circle at 30% 30%, rgba(255,255,255,0.26), transparent 40%), var(--p0-fill)}
.piece.p1{
  background:
    repeating-linear-gradient(45deg, rgba(0,0,0,0.10) 0 6px, rgba(255,255,255,0.08) 6px 12px),
    radial-gradient(circle at 30% 30%, rgba(255,255,255,0.20), transparent 40%),
    var(--p1-fill);
}
.piece.king::after{
  content:"♛";
  font-weight:900;
  font-size:clamp(14px, 2.2vmin, 22px);
  line-height:1;
  color:rgba(0,0,0,0.68);
  text-shadow:0 1px 0 rgba(255,255,255,0.20);
}
.note{
  border:1px solid rgba(255,255,255,0.14);
  background:rgba(0,0,0,0.20);
  border-radius:14px;
  padding:12px;
}
.note.warn{border-color:rgba(245,158,11,0.45);background:rgba(245,158,11,0.10)}
.note.ok{border-color:rgba(18,185,129,0.45);background:rgba(18,185,129,0.10)}

.note.chat{display:grid;gap:8px}
.note.chat.compact{padding:10px}
.chat-log{
  border:1px solid rgba(255,255,255,0.12);
  background:rgba(0,0,0,0.16);
  border-radius:12px;
  padding:8px;
  max-height:140px;
  overflow:auto;
}
.note.chat.compact .chat-log{max-height:120px}
.chat-line{
  font-size:13px;
  line-height:1.35;
  color:rgba(231,235,255,0.92);
  margin:2px 0;
  word-break:break-word;
}
.note.chat form{display:flex;gap:10px;align-items:center}
.note.chat form input{
  flex:1 1 auto;
  min-width:160px;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,0.14);
  background:rgba(0,0,0,0.22);
  color:var(--text);
  outline:none;
}

@media (max-height: 720px){
  .legalBar{padding:8px 10px;font-size:12px}
  .screen{gap:10px}
  .card{padding:12px;border-radius:16px}
  .title{font-size:22px}
  .board-wrap > .side-panel{max-height:42%;overflow:auto}
}

@media (max-width: 520px){
  .btn{padding:9px 10px}
  .app-root{padding:10px}
  .board-wrap > .side-panel{max-height:40%;overflow:auto}
}

.toast{
  position:fixed;
  left:50%;
  bottom:20px;
  transform:translateX(-50%);
  background:rgba(0,0,0,0.72);
  border:1px solid rgba(255,255,255,0.16);
  padding:10px 12px;
  border-radius:12px;
  color:rgba(231,235,255,0.92);
  z-index:20;
  max-width:min(720px, calc(100% - 24px));
  box-shadow:0 20px 60px rgba(0,0,0,0.55);
}

.overlay{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.62);
  display:grid;
  place-items:center;
  padding:18px;
  z-index:50;
}
.overlay-card{
  width:min(720px, 100%);
  border-radius:18px;
  border:1px solid rgba(255,255,255,0.14);
  background:rgba(0,0,0,0.62);
  backdrop-filter:blur(12px);
  box-shadow:0 24px 70px rgba(0,0,0,0.45);
  padding:16px;
  display:grid;
  gap:12px;
}
.overlay-title{font-weight:900;font-size:18px}
.overlay-actions{display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap}