:root{
  --bg0:#050815; --bg1:#0b1020;
  --card:rgba(18,26,51,.86);
  --card2:rgba(10,15,34,.9);
  --text:#e9eefc; --muted:#a9b4d6;
  --border:#243058; --border2:#2d3a69;
  --accent:#7aa2ff; --accent2:#9ad1ff;
  --danger:#ff5b5b; --ok:#44ff9a;
  --shadow: 0 14px 40px rgba(0,0,0,.35);
  --radius:18px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: radial-gradient(900px 500px at 20% -10%, rgba(122,162,255,.18), transparent 55%),
              radial-gradient(900px 500px at 80% 10%, rgba(154,209,255,.14), transparent 60%),
              linear-gradient(180deg,var(--bg0), var(--bg1));
  color:var(--text);
}

a{color:inherit;text-decoration:none}
a:hover{opacity:.95}

.wrap{max-width:1120px;margin:0 auto;padding:18px}

.topbar{
  position:sticky;top:0;z-index:50;
  background: rgba(5,8,21,.78);
  backdrop-filter: blur(12px);
  border-bottom:1px solid var(--border);
}
.topbar .wrap{display:flex;gap:14px;align-items:center}

.brand{font-weight:800;letter-spacing:.2px}
.nav{display:flex;gap:8px;flex:1}
.nav a{
  padding:9px 12px;border-radius:12px;
  color:var(--muted);
}
.nav a:hover{background:rgba(122,162,255,.12);color:var(--text)}

.right{display:flex;gap:10px;align-items:center;justify-content:flex-end}

.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;border:1px solid var(--border);
  border-radius:999px;color:var(--muted);font-size:14px;
  background:rgba(255,255,255,.03);
}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px;
  box-shadow:var(--shadow);
}

.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}
.col-6{grid-column:span 6}
.col-12{grid-column:span 12}
@media (max-width:900px){.col-6{grid-column:span 12}.right{gap:8px}}

h1{font-size:28px;margin:0 0 10px}
h2{font-size:18px;margin:0 0 10px;color:var(--text)}
p{color:var(--muted);line-height:1.55;margin:0 0 12px}

label{display:block;color:var(--muted);font-size:13px;margin:0 0 6px}
.input, select.input{
  width:100%;
  padding:11px 12px;
  border-radius:14px;
  border:1px solid var(--border2);
  background:var(--card2);
  color:var(--text);
  outline:none;
}
.input:focus{border-color:rgba(122,162,255,.55);box-shadow:0 0 0 3px rgba(122,162,255,.12)}

.row{display:flex;gap:10px;align-items:center}
.row > *{flex:1}

.btn{
  padding:11px 12px;
  border-radius:14px;
  border:1px solid rgba(122,162,255,.45);
  background: linear-gradient(180deg, rgba(122,162,255,.24), rgba(122,162,255,.14));
  color:var(--text);
  cursor:pointer;
  font-weight:600;
}
.btn:hover{filter:brightness(1.06)}
.btn:active{transform:translateY(1px)}

.btn-ghost{
  background:rgba(255,255,255,.03);
  border:1px solid var(--border);
  color:var(--muted);
}
.btn-ghost:hover{color:var(--text);border-color:rgba(122,162,255,.35)}

.btn-danger{
  border-color:rgba(255,91,91,.55);
  background:linear-gradient(180deg, rgba(255,91,91,.18), rgba(255,91,91,.08));
}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 9px;border-radius:999px;
  border:1px solid var(--border);
  color:var(--muted);
  font-size:12px;
  background:rgba(255,255,255,.03);
}
.kbd{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  background:rgba(10,15,34,.95);
  border:1px solid var(--border);
  padding:2px 8px;border-radius:10px;color:var(--muted);
}

.notice{
  padding:10px 12px;border-radius:14px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.04);
  color:var(--muted);
}
.notice.ok{border-color:rgba(68,255,154,.35);background:rgba(68,255,154,.08);color:#d7ffeb}
.notice.err{border-color:rgba(255,91,91,.38);background:rgba(255,91,91,.10);color:#ffd4d4}

.table{width:100%;border-collapse:collapse}
.table th,.table td{border-bottom:1px solid var(--border);padding:10px 8px;text-align:left}
.table th{color:var(--text);font-weight:700}
.table td{color:var(--muted)}
.table tr:hover td{background:rgba(122,162,255,.06)}

.footer{opacity:.85;margin-top:18px}
hr.sep{border:0;border-top:1px solid var(--border);margin:14px 0}

.gameGrid{
  display:grid;
  gap:6px;
}
.cell{
  width:26px;height:26px;border-radius:8px;
  border:1px solid var(--border2);
  background:rgba(255,255,255,.03);
  cursor:pointer;
}
.cell:hover{filter:brightness(1.12)}
.cell.own-ship{background:rgba(122,162,255,.16)}
.cell.hit{background:rgba(255,91,91,.18);border-color:rgba(255,91,91,.45)}
.cell.miss{background:rgba(169,180,214,.10)}
.cell.disabled{cursor:not-allowed;opacity:.7}
@media(max-width:520px){.cell{width:22px;height:22px}}

.lgrid{
  display:grid;
  gap:6px;
  align-items:center;
  justify-content:start;
  overflow:auto;
  padding:6px;
  border-radius:16px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.02);
}
.lcell.label{
  height:26px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  font-size:12px;
  border:1px solid transparent;
  user-select:none;
}