:root{
  --bg:#0a0b14; --board:#12142a; --grid:#1c1f3d; --line:#242850;
  --txt:#e8ecff; --dim:#7c85b8; --accent:#00e5ff; --accent2:#ff2fb3;
  --cell:30px;
  --p-I:#00e5ff; --p-J:#3d6bff; --p-L:#ff9f1c; --p-O:#ffe14d;
  --p-S:#3ddc84; --p-T:#c04dff; --p-Z:#ff4d5e;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  background:radial-gradient(circle at 50% -10%,color-mix(in srgb,var(--accent) 12%,var(--bg)) 0%,var(--bg) 55%);
  color:var(--txt);
  font-family:"Segoe UI",system-ui,-apple-system,sans-serif;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:100dvh;overflow:hidden;padding:8px;gap:8px;
  -webkit-tap-highlight-color:transparent;user-select:none;
}
body.no-bg{background:var(--bg)}
.hidden{display:none !important}

/* ---------- encabezado ---------- */
#top{display:flex;align-items:center;gap:14px}
h1{
  font-size:clamp(17px,4vw,26px);letter-spacing:.5em;font-weight:800;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;background-clip:text;color:transparent;text-indent:.5em;
}
#topBtns{display:flex;gap:6px}
.ibtn{
  width:28px;height:28px;border-radius:8px;border:1px solid var(--line);
  background:color-mix(in srgb,var(--board) 80%,transparent);color:var(--dim);
  font-size:14px;cursor:pointer;line-height:1;
}
.ibtn:hover{color:var(--txt);border-color:var(--accent)}

/* ---------- layout ---------- */
#game{display:flex;gap:12px;align-items:flex-start}
.side{display:flex;flex-direction:column;gap:8px;width:clamp(78px,15vw,116px)}
.box{
  background:linear-gradient(180deg,color-mix(in srgb,var(--grid) 92%,transparent),color-mix(in srgb,var(--board) 92%,transparent));
  border:1px solid var(--line);border-radius:10px;padding:7px;
}
.box h2{
  font-size:9.5px;letter-spacing:.18em;color:var(--dim);
  text-transform:uppercase;font-weight:700;margin-bottom:5px;text-align:center;
}
.box .val{font-size:clamp(14px,3vw,19px);font-weight:800;text-align:center;font-variant-numeric:tabular-nums}
.box canvas{display:block;margin:0 auto;max-width:100%}
.mini{display:flex;justify-content:space-between;font-size:10px;color:var(--dim);margin-top:4px}
.mini b{color:var(--txt);font-variant-numeric:tabular-nums}
#hud.danger{border-color:#ff4d5e;box-shadow:0 0 14px rgba(255,77,94,.35)}

#boardWrap{
  position:relative;border-radius:12px;overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 0 60px color-mix(in srgb,var(--accent) 12%,transparent),0 18px 50px rgba(0,0,0,.6);
  width:calc(var(--cell) * 10);height:calc(var(--cell) * 20);
}
#board{display:block;width:100%;height:100%;background:var(--board)}

/* ---------- mensajes flotantes ---------- */
#msgs{
  position:absolute;top:14%;left:0;right:0;pointer-events:none;
  display:flex;flex-direction:column;align-items:center;gap:2px;
}
.msg{
  font-size:clamp(13px,2.8vw,19px);font-weight:800;letter-spacing:.07em;
  text-shadow:0 0 16px currentColor;transition:none;
}

/* ---------- overlays ---------- */
#overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.screen{
  position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:9px;text-align:center;
  background:color-mix(in srgb,var(--bg) 90%,transparent);
  backdrop-filter:blur(4px);padding:14px;
}
.screen.transparent{background:transparent;backdrop-filter:none}
.screen.scroll{justify-content:flex-start;overflow-y:auto;padding-top:16px}
.stitle{font-size:clamp(15px,3.4vw,21px);font-weight:800;letter-spacing:.09em}
.ssub{font-size:11px;letter-spacing:.14em;color:var(--dim);text-transform:uppercase;margin-top:8px}
.big{font-size:clamp(26px,7vw,42px);font-weight:800;font-variant-numeric:tabular-nums;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.sub{font-size:11.5px;color:var(--dim)}
.note{font-size:10.5px;color:var(--dim);line-height:1.6;max-width:250px}
.row{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:4px}

.btn{
  padding:9px 18px;border-radius:999px;border:0;cursor:pointer;
  font-weight:800;letter-spacing:.08em;font-size:11.5px;color:#08101a;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--txt)}
.btn:active{transform:scale(.96)}

.modes{display:flex;flex-direction:column;gap:7px;width:100%;max-width:250px}
.mode{
  display:flex;flex-direction:column;gap:2px;text-align:left;cursor:pointer;
  padding:9px 12px;border-radius:11px;border:1px solid var(--line);
  background:color-mix(in srgb,var(--grid) 60%,transparent);color:var(--txt);
}
.mode:hover{border-color:var(--accent)}
.mode b{font-size:13.5px;letter-spacing:.05em}
.mode small{font-size:10px;color:var(--dim);line-height:1.4}
.mode .best{font-size:9.5px;color:var(--dim);margin-top:2px}
.mode .best i{color:var(--accent);font-style:normal;font-weight:700}

.chips{display:flex;flex-wrap:wrap;gap:5px;justify-content:center;max-width:260px}
.chips span{
  font-size:10px;color:var(--dim);border:1px solid var(--line);
  border-radius:999px;padding:2px 8px;
}
.record{font-size:12px;font-weight:800;color:var(--accent);letter-spacing:.08em}

#countdownNum{
  font-size:clamp(56px,18vw,110px);font-weight:900;letter-spacing:.04em;
  color:var(--accent);text-shadow:0 0 40px color-mix(in srgb,var(--accent) 60%,transparent);
}

/* ---------- opciones ---------- */
.opt{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  width:100%;max-width:270px;font-size:11.5px;color:var(--txt);
  padding:4px 0;border-bottom:1px solid color-mix(in srgb,var(--line) 60%,transparent);
}
.opt label{color:var(--dim);text-align:left}
.opt label i{color:var(--txt);font-style:normal;font-weight:700}
.opt input[type=range]{width:110px;accent-color:var(--accent)}
.opt input[type=checkbox]{width:16px;height:16px;accent-color:var(--accent)}
.opt select{
  background:var(--board);color:var(--txt);border:1px solid var(--line);
  border-radius:6px;padding:3px 6px;font-size:11px;
}
#keyBinder{width:100%;max-width:270px}
.krow{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:11px;color:var(--dim);padding:3px 0}
.kbtn{
  min-width:96px;padding:3px 8px;border-radius:6px;cursor:pointer;font-size:10.5px;
  border:1px solid var(--line);background:var(--board);color:var(--txt);
}
.kbtn:hover{border-color:var(--accent)}

/* ---------- ayuda y puntajes ---------- */
.hrow{display:flex;justify-content:space-between;gap:10px;width:100%;max-width:270px;font-size:11px;padding:3px 0}
.hlabel{color:var(--dim)}
.hkeys{display:flex;gap:3px;flex-wrap:wrap;justify-content:flex-end}
kbd{
  background:var(--grid);border:1px solid var(--line);border-radius:4px;
  padding:1px 5px;font-family:inherit;font-size:10px;color:var(--txt);
}
.tabs{display:flex;gap:5px}
.tab{
  padding:4px 10px;border-radius:999px;cursor:pointer;font-size:10.5px;
  border:1px solid var(--line);background:transparent;color:var(--dim);
}
.tab:hover{color:var(--txt);border-color:var(--accent)}
#scoreTable{width:100%;max-width:270px;display:flex;flex-direction:column;gap:4px;margin-top:6px}
.srow{display:flex;align-items:baseline;gap:8px;font-size:11px;padding:4px 6px;border-radius:7px;background:color-mix(in srgb,var(--grid) 55%,transparent)}
.spos{color:var(--accent);font-weight:800;width:14px}
.sval{font-weight:800;font-variant-numeric:tabular-nums}
.ssub2,.ssub{color:var(--dim)}
.srow .ssub{font-size:9.5px;margin-left:auto}
.empty{font-size:11px;color:var(--dim);padding:10px}

/* estadísticas de piezas */
.pstats{display:flex;flex-direction:column;gap:3px;width:100%;max-width:250px;margin-top:2px}
.pstat{display:flex;align-items:center;gap:6px;font-size:10px}
.pk{width:14px;font-weight:800;text-align:center}
.pk-I{color:var(--p-I)}.pk-J{color:var(--p-J)}.pk-L{color:var(--p-L)}.pk-O{color:var(--p-O)}
.pk-S{color:var(--p-S)}.pk-T{color:var(--p-T)}.pk-Z{color:var(--p-Z)}
.pbar{flex:1;height:5px;border-radius:3px;background:color-mix(in srgb,var(--line) 70%,transparent);overflow:hidden}
.pbar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.pn{width:20px;text-align:right;color:var(--dim);font-variant-numeric:tabular-nums}

/* ---------- táctil ---------- */
#touch{display:none;gap:6px;width:100%;max-width:520px}
#touch button{
  flex:1;padding:13px 0;border-radius:10px;border:1px solid var(--line);
  background:color-mix(in srgb,var(--grid) 75%,transparent);color:var(--txt);
  font-size:15px;font-weight:700;cursor:pointer;
}
#touch button:active{background:var(--line)}

@media (max-width:700px),(pointer:coarse){
  #touch{display:flex}
  #game{gap:6px}
  .side{width:64px}
  .box h2{font-size:8.5px}
  .mini{font-size:9px}
}
@media (max-width:430px){
  .side{width:54px}
  #next{height:150px}
}