/* style.css — all styling for Checkers */
:root{
  --bg:#0f1320;
  --bg-2:#171c2e;
  --panel:#1d2336;
  --panel-2:#222a42;
  --line:#2c3552;
  --text:#eef2ff;
  --muted:#9aa3c4;
  --accent:#ffb454;
  --accent-2:#ff7ab6;
  --good:#5fd1a1;
  --bad:#ff6b6b;
  --piece-red:#e94560;
  --piece-red-2:#b92240;
  --piece-black:#3a4159;
  --piece-black-2:#20253a;
  --sq-light:#e8d5a3;
  --sq-dark:#7a4a2e;
  --sq-accent:#caa15a;
  color-scheme:dark;
  --radius:14px;
  --shadow:0 10px 30px rgba(0,0,0,.45);
}
@media (prefers-color-scheme:light){
  :root{
    --bg:#f4f1ea; --bg-2:#ece7db; --panel:#ffffff; --panel-2:#f7f3ec;
    --line:#e3ddd0; --text:#2a2733; --muted:#6b6757;
    --piece-red:#d63751; --piece-red-2:#9c1f37;
    --piece-black:#3a3f55; --piece-black-2:#232740;
    --shadow:0 8px 22px rgba(60,50,30,.18);
  }
}
html[data-theme="dark"]{
  --bg:#0f1320; --bg-2:#171c2e; --panel:#1d2336; --panel-2:#222a42;
  --line:#2c3552; --text:#eef2ff; --muted:#9aa3c4;
  --piece-red:#e94560; --piece-red-2:#b92240;
  --piece-black:#3a4159; --piece-black-2:#20253a;
  color-scheme:dark; --shadow:0 10px 30px rgba(0,0,0,.45);
}
html[data-theme="light"]{
  --bg:#f4f1ea; --bg-2:#ece7db; --panel:#ffffff; --panel-2:#f7f3ec;
  --line:#e3ddd0; --text:#2a2733; --muted:#6b6757;
  --piece-red:#d63751; --piece-red-2:#9c1f37;
  --piece-black:#3a3f55; --piece-black-2:#232740;
  color-scheme:light; --shadow:0 8px 22px rgba(60,50,30,.18);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:radial-gradient(1200px 600px at 20% -10%, var(--bg-2), var(--bg) 60%);
  color:var(--text);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

.app{max-width:1100px;margin:0 auto;padding:16px 14px 28px}

.topbar{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;margin-bottom:14px;
}
.brand{display:flex;align-items:center;gap:12px}
.logo{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;font-size:22px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#1a1206;box-shadow:var(--shadow);
}
h1{margin:0;font-size:20px;letter-spacing:.2px}
.tag{margin:0;color:var(--muted);font-size:12px}
.top-actions{display:flex;gap:8px}
.ghost-btn{
  width:40px;height:40px;border-radius:11px;border:1px solid var(--line);
  background:var(--panel);color:var(--text);font-size:18px;cursor:pointer;
  transition:transform .12s ease, background .2s ease, border-color .2s ease;
}
.ghost-btn:hover{background:var(--panel-2);transform:translateY(-1px)}
.ghost-btn:active{transform:translateY(0)}

.layout{
  display:grid;grid-template-columns:1fr 300px;gap:16px;align-items:start;
}
@media (max-width:820px){ .layout{grid-template-columns:1fr} }

.board-wrap{display:flex;flex-direction:column;gap:10px}
.board-frame{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:10px;box-shadow:var(--shadow);
}
.board{
  display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);
  aspect-ratio:1/1;width:100%;
  border-radius:10px;overflow:hidden;
  box-shadow:inset 0 0 0 2px rgba(0,0,0,.25);
}
.cell{
  position:relative;display:grid;place-items:center;cursor:pointer;
  transition:background .15s ease;
}
.cell.light{background:var(--sq-light)}
.cell.dark{background:var(--sq-dark)}
.cell.selected{box-shadow:inset 0 0 0 3px var(--sq-accent)}
.cell.target::before{
  content:"";position:absolute;width:30%;height:30%;border-radius:50%;
  background:rgba(255,255,255,.55);box-shadow:0 0 0 4px rgba(255,255,255,.15);
  animation:pulse 1.4s ease-in-out infinite;
}
.cell.target-jump::before{background:var(--accent-2);box-shadow:0 0 0 5px rgba(255,122,182,.25)}
@keyframes pulse{0%,100%{transform:scale(.85);opacity:.8}50%{transform:scale(1.05);opacity:1}}

.piece{
  width:78%;height:78%;border-radius:50%;
  display:grid;place-items:center;position:relative;
  transform:translateY(-1px);transition:transform .14s ease;
  box-shadow:0 4px 10px rgba(0,0,0,.4), inset 0 -3px 6px rgba(0,0,0,.35), inset 0 3px 6px rgba(255,255,255,.25);
}
.piece.red{background:radial-gradient(circle at 35% 30%, #ff6b81, var(--piece-red) 55%, var(--piece-red-2))}
.piece.black{background:radial-gradient(circle at 35% 30%, #5b6486, var(--piece-black) 55%, var(--piece-black-2))}
.piece-inner{
  width:54%;height:54%;border-radius:50%;
  background:radial-gradient(circle at 40% 35%, rgba(255,255,255,.25), transparent 60%);
  border:1px dashed rgba(0,0,0,.18);
}
.piece.king .crown{
  position:absolute;font-size:60%;color:#ffe9a8;
  text-shadow:0 1px 2px rgba(0,0,0,.6);
  line-height:1;
}
.piece.hint{animation:hint 1.6s ease-in-out infinite}
@keyframes hint{0%,100%{transform:translateY(-1px)}50%{transform:translateY(-4px)}}

.turn-bar{
  display:flex;align-items:center;gap:10px;
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:10px 14px;font-size:14px;color:var(--muted);
}
.turn-dot{width:14px;height:14px;border-radius:50%}
.turn-dot.red{background:var(--piece-red);box-shadow:0 0 0 3px rgba(233,69,96,.25)}
.turn-dot.black{background:var(--piece-black);box-shadow:0 0 0 3px rgba(58,65,89,.4)}
.turn-bar.busy .turn-dot{animation:blink .9s linear infinite}
@keyframes blink{50%{opacity:.35}}

.panel{display:flex;flex-direction:column;gap:12px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px;box-shadow:var(--shadow);
}
.card h3{margin:0 0 10px;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}

.status-card .status-title{font-size:18px;font-weight:700}
.status-card .status-sub{margin-top:4px;color:var(--muted);font-size:13px;line-height:1.4}

.captured-row{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin:6px 0}
.cap-piece{width:14px;height:14px;border-radius:50%}
.cap-piece.red{background:var(--piece-red)}
.cap-piece.black{background:var(--piece-black)}
.cap-label{font-size:12px;color:var(--muted);margin-left:6px}

.seg{display:flex;gap:6px;background:var(--bg-2);padding:4px;border-radius:10px;border:1px solid var(--line)}
.seg button{
  flex:1;border:0;background:transparent;color:var(--muted);
  padding:8px 6px;border-radius:7px;font-size:13px;cursor:pointer;transition:all .15s ease;
}
.seg button:hover{color:var(--text)}
.seg button.active{background:var(--panel-2);color:var(--text);box-shadow:0 1px 0 rgba(255,255,255,.05)}

.themes{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.theme-swatch{
  position:relative;height:46px;border-radius:10px;border:1px solid var(--line);
  cursor:pointer;overflow:hidden;transition:transform .12s ease,border-color .15s ease;
  background:linear-gradient(135deg,var(--sl) 50%,var(--sd) 50%);
}
.theme-swatch:hover{transform:translateY(-1px)}
.theme-swatch.active{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-2) inset}
.theme-name{
  position:absolute;left:8px;bottom:6px;font-size:11px;font-weight:600;
  color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.6);
}

.stats-line{font-size:14px;color:var(--muted)}
.stats-line b{color:var(--text);font-size:16px}
.link-btn{
  margin-top:8px;background:none;border:0;color:var(--accent-2);
  font-size:12px;cursor:pointer;padding:4px 0;
}
.link-btn:hover{text-decoration:underline}

.primary-btn{
  border:0;border-radius:12px;padding:13px;cursor:pointer;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#1a1206;font-weight:700;font-size:15px;letter-spacing:.3px;
  box-shadow:var(--shadow);transition:transform .12s ease, filter .2s ease;
}
.primary-btn:hover{transform:translateY(-1px);filter:brightness(1.05)}
.primary-btn:active{transform:translateY(0)}

/* Subtle entrance */
.app{animation:rise .4s ease both}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}