:root{
  --bg:#0b0f19;
  --panelBorder: rgba(255,255,255,.08);
  --text:#e8eefc;
  --muted:#8ea0c9;
  --hit:#22c55e;
  --hitText:#06230f;
  --danger:#ef4444;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius:16px;
}

*{ 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";
  background: radial-gradient(1200px 700px at 20% 10%, #172554 0%, transparent 55%),
              radial-gradient(900px 600px at 80% 20%, #0e7490 0%, transparent 60%),
              var(--bg);
  color:var(--text);
  overflow:hidden;
}

.wrap{
  height:100vh;
  max-width: 1500px;
  margin:0 auto;
  padding: 12px;
  display:flex;
  flex-direction:column;
  gap:12px;
}

/* TOP BAR */
.topbar{
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border:1px solid var(--panelBorder);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 10px 12px;
  display:grid;
  grid-template-columns: 1fr auto 1fr;
  align-items:center;
  gap:10px;
}

.topbar-left{
  display:flex;
  align-items:center;
  gap:10px;
}
.brand{
  font-weight:1000;
  letter-spacing:.14em;
  font-size:12px;
  color: var(--muted);
}

.topbar-center{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  line-height:1;
}
.last-label{
  font-weight:950;
  letter-spacing:.12em;
  font-size:11px;
  color: var(--muted);
}
.last-num{
  font-weight:1000;
  font-size: clamp(44px, 6.2vw, 78px);
  text-shadow: 0 10px 30px rgba(0,0,0,.35);
  transform-origin:center;
}

.topbar-right{
  display:flex;
  justify-content:flex-end;
  gap:10px;
  flex-wrap:wrap;
}

/* Buttons */
.btn{
  appearance:none;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color:var(--text);
  padding:10px 12px;
  border-radius:12px;
  cursor:pointer;
  font-weight:850;
  letter-spacing:.02em;
  transition: transform .06s ease, background .2s ease, border-color .2s ease;
  user-select:none;
}
.btn:hover{ background: rgba(255,255,255,.10); border-color: rgba(255,255,255,.18); }
.btn:active{ transform: translateY(1px) scale(.99); }
.btn.danger{
  border-color: rgba(239,68,68,.35);
  background: rgba(239,68,68,.12);
}
.btn.danger:hover{ background: rgba(239,68,68,.18); }

/* Board */
.board{
  flex: 1;
  min-height: 0;
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border:1px solid var(--panelBorder);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px;
  overflow:hidden;
}

/* GRID 10x9 */
.grid{
  height: 100%;
  display:grid;
  grid-template-columns: repeat(10, 1fr);
  grid-template-rows: repeat(9, 1fr);
  gap: 10px;
}

/* CELDAS: NÚMEROS EN BLANCO */
.cell{
  width:100%;
  height:100%;
  background: rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10);
  border-radius: 14px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:1000;
  font-size: clamp(16px, 2.3vw, 34px);
  cursor:pointer;
  user-select:none;
  color: #ffffff; /* <- BLANCO */
  transition: transform .08s ease, background .2s ease, border-color .2s ease, filter .2s ease;
}
.cell:hover{ filter: brightness(1.15); }
.cell:active{ transform: scale(.985); }

.cell.hit{
  background: linear-gradient(180deg, rgba(34,197,94,.95), rgba(34,197,94,.70));
  border-color: rgba(34,197,94,.55);
  color: var(--hitText); /* cuando marcado, texto oscuro para contraste */
  box-shadow: 0 10px 22px rgba(34,197,94,.15);
}

/* Bounce */
.bounce{
  animation: bounce .45s cubic-bezier(.2, .9, .2, 1.2);
}
@keyframes bounce{
  0%{ transform: scale(.7); opacity:.6;}
  55%{ transform: scale(1.18); opacity:1;}
  75%{ transform: scale(.98); }
  100%{ transform: scale(1); }
}

/* Modal */
.modal-backdrop{
  position:fixed;
  inset:0;
  background: rgba(0,0,0,.55);
  align-items:center;
  justify-content:center;
  padding: 16px;
  z-index:9999;
  display:none; /* cerrado por defecto */
}

.modal{
  width:min(520px, 100%);
  background: rgba(15,22,38,.92);
  border:1px solid rgba(255,255,255,.12);
  border-radius: 18px;
  box-shadow: 0 20px 60px rgba(0,0,0,.55);
  padding: 16px 16px 14px;
  backdrop-filter: blur(10px);
}
.modal-title{
  font-size: 18px;
  font-weight: 1000;
  margin-bottom: 8px;
}
.modal-desc{
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
  margin-bottom: 14px;
}
.modal-actions{
  display:flex;
  justify-content:flex-end;
  gap:10px;
}

/* Overlay anuncio */
.announce{
  position:fixed;
  inset:0;
  display:none; /* cerrado por defecto */
  align-items:center;
  justify-content:center;
  z-index:9998;
  background: rgba(0,0,0,.35);
  padding: 16px;
}
.announce-card{
  width:min(680px, 100%);
  text-align:center;
  background: rgba(15,22,38,.92);
  border:1px solid rgba(255,255,255,.14);
  border-radius: 22px;
  box-shadow: 0 30px 90px rgba(0,0,0,.60);
  padding: 22px 18px 18px;
  backdrop-filter: blur(12px);
  transform-origin:center;
  animation: pop .22s ease-out;
}
@keyframes pop{
  from{ transform: scale(.92); opacity:.3; }
  to{ transform: scale(1); opacity:1; }
}
.announce-title{
  font-weight: 1100;
  font-size: clamp(26px, 4vw, 54px);
  margin-bottom: 6px;
}
.announce-sub{
  color: var(--muted);
  font-weight: 800;
  font-size: clamp(14px, 2vw, 18px);
}
.announce-hint{
  margin-top: 10px;
  color: rgba(142,160,201,.9);
  font-size: 12px;
  letter-spacing: .06em;
}

/* Focus */
.cell:focus-visible, .btn:focus-visible{
  outline: 3px solid rgba(110,231,255,.55);
  outline-offset: 2px;
}

/* FIX DEFINITIVO: si tiene [hidden], fuera SIEMPRE */
.modal-backdrop[hidden],
.announce[hidden]{
  display: none !important;
}

/* Responsive */
@media (max-height: 820px){
  .wrap{ padding: 10px; gap:10px; }
  .topbar{ padding: 8px 10px; }
  .grid{ gap: 8px; }
  .cell{ border-radius: 12px; font-size: clamp(14px, 2.2vw, 30px); }
  .last-num{ font-size: clamp(40px, 6vw, 70px); }
}