/* Connect 4 — scoped game UI */
.c4-shell{
  --c4-p1: #F43F5E;
  --c4-p2: #22C55E;
  --c4-board: #1a2a6c;
  --c4-hole: #070A12;
  max-width: 520px;
  margin: 0 auto 28px;
}

.c4-hud{
  display:grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap:10px;
  margin-bottom:14px;
}
.c4-stat{
  background: rgba(255,255,255,.06);
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px 14px;
  text-align:center;
}
.c4-stat .label{
  display:block;
  font-size:11px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--muted);
  font-weight:700;
  margin-bottom:4px;
}
.c4-stat .value{
  font-size:20px;
  font-weight:800;
  font-variant-numeric: tabular-nums;
}
.c4-turn-dot{
  display:inline-block;
  width:12px; height:12px;
  border-radius:50%;
  margin-right:6px;
  vertical-align:middle;
  box-shadow: 0 0 0 2px rgba(255,255,255,.2);
}
.c4-turn-dot.p1{ background: var(--c4-p1); }
.c4-turn-dot.p2{ background: var(--c4-p2); }

.c4-modes{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:14px;
}
.c4-mode-btn{
  appearance:none;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color:var(--muted);
  font-weight:800;
  font-size:13px;
  padding:9px 14px;
  border-radius:999px;
  cursor:pointer;
  transition: background .12s ease, color .12s ease, border-color .12s ease;
}
.c4-mode-btn:hover{
  color:var(--text);
  border-color: rgba(255,255,255,.24);
}
.c4-mode-btn.is-active{
  color:#081018;
  background: linear-gradient(135deg, #A78BFA, #34D399);
  border-color: transparent;
}

.c4-board-wrap{
  position:relative;
  background: linear-gradient(180deg, #2a3f9e, #1a2a6c);
  border:1px solid rgba(255,255,255,.18);
  border-radius:22px;
  padding:14px 12px 16px;
  box-shadow: var(--shadow);
  user-select:none;
  overflow:hidden;
}
.c4-columns{
  display:grid;
  grid-template-columns: repeat(7, 1fr);
  gap:8px;
}
.c4-col{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:4px 0;
  border:0;
  background:transparent;
  border-radius:14px;
  cursor:pointer;
  min-width:0;
}
.c4-col:focus-visible{
  outline:2px solid rgba(167,139,250,.9);
  outline-offset:2px;
}
.c4-col:hover:not(:disabled){
  background: rgba(255,255,255,.06);
}
.c4-col:disabled{
  cursor:default;
}
.c4-cell{
  aspect-ratio:1;
  width:100%;
  border-radius:50%;
  background: var(--c4-hole);
  box-shadow: inset 0 4px 10px rgba(0,0,0,.45);
  position:relative;
  overflow:visible;
  z-index:0;
}
.c4-cell.is-landing{
  z-index:2;
}
.c4-disc{
  position:absolute;
  inset:6%;
  border-radius:50%;
  opacity:0;
  transform: translateY(0);
  pointer-events:none;
  box-shadow:
    inset 0 -4px 8px rgba(0,0,0,.28),
    inset 0 3px 6px rgba(255,255,255,.28);
  will-change: transform;
}
.c4-disc.p1{ background: radial-gradient(circle at 35% 30%, #fb7185, var(--c4-p1)); }
.c4-disc.p2{ background: radial-gradient(circle at 35% 30%, #4ade80, var(--c4-p2)); }
.c4-disc.is-settled{
  opacity:1;
  transform: translateY(0);
}
.c4-disc.is-dropping{
  opacity:1;
  animation: c4-drop var(--c4-dur, .45s) cubic-bezier(.15,.85,.25,1) both;
}
.c4-disc.is-win{
  box-shadow:
    0 0 0 3px rgba(255,255,255,.85),
    0 0 18px rgba(255,255,255,.35),
    inset 0 -4px 8px rgba(0,0,0,.28);
}

@keyframes c4-drop{
  0%{
    transform: translateY(var(--c4-from, -520%));
  }
  78%{
    transform: translateY(6%);
  }
  90%{
    transform: translateY(-3%);
  }
  100%{
    transform: translateY(0);
  }
}

.c4-overlay{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  background: rgba(7,10,18,.62);
  border-radius:22px;
  padding:20px;
  z-index:2;
}
.c4-overlay[hidden]{ display:none !important; }
.c4-overlay-card{
  width:min(100%, 320px);
  text-align:center;
  background: rgba(12,18,40,.95);
  border:1px solid rgba(255,255,255,.16);
  border-radius:18px;
  padding:22px 18px;
  box-shadow: var(--shadow);
}
.c4-overlay-card h2{
  margin:0 0 8px;
  font-size:22px;
}
.c4-overlay-card p{
  margin:0 0 16px;
  color:var(--muted);
  font-size:14px;
  line-height:1.5;
}

.c4-actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:14px;
  justify-content:center;
}

.c4-shell.is-busy .c4-col{ pointer-events:none; }

@media (max-width: 420px){
  .c4-board-wrap{ padding:10px 8px 12px; border-radius:18px; }
  .c4-columns{ gap:5px; }
  .c4-col{ gap:5px; }
  .c4-disc{ inset:8%; }
  .c4-hud{ grid-template-columns: 1fr 1fr; }
  .c4-stat:last-child{ grid-column: 1 / -1; }
}