:root {
  --bg: #08131f;
  --bg-soft: #0d1f31;
  --panel: #13263a;
  --panel-soft: #1a324a;
  --ink: #e8f0f8;
  --muted: #93a8bb;
  --accent: #1bc49d;
  --accent-ink: #07231d;
  --hit: #e05252;
  --miss: #6f88a8;
  --ship: #4ec4e0;
  --line: #26435f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Lucida Sans Unicode", "Lucida Grande", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 15%, rgba(27, 196, 157, 0.16), transparent 32%),
    radial-gradient(circle at 80% 10%, rgba(78, 196, 224, 0.18), transparent 34%),
    linear-gradient(160deg, var(--bg) 0%, #050c14 100%);
  min-height: 100vh;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 22px;
  display: grid;
  gap: 18px;
}

.lang-bar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.88rem;
}

#language-select {
  background: #0f2133;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 8px;
}

.screen {
  display: grid;
  gap: 16px;
}

.page-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.78rem;
  padding: 6px 0 2px;
  opacity: 0.9;
}

.centered {
  min-height: 85vh;
  place-items: center;
}

.card {
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-soft) 100%);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 12px 34px rgba(1, 8, 15, 0.45);
}

.title-card {
  width: min(520px, 100%);
  text-align: center;
}

.title-card h1 {
  margin: 6px 0 8px;
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  letter-spacing: 0.04em;
}

.title-card p {
  margin: 0 0 16px;
  color: var(--muted);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.badge {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  font-size: 0.9rem;
}

.menu-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.menu-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  background: linear-gradient(140deg, rgba(78, 196, 224, 0.09), rgba(27, 196, 157, 0.08));
  color: var(--ink);
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease;
}

.menu-card:hover {
  transform: translateY(-2px);
  border-color: #3f7aa4;
}

.menu-title {
  font-size: 1.05rem;
  font-weight: 700;
}

.menu-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.stack-form {
  display: grid;
  gap: 10px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

input {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  color: var(--ink);
  background: #0f2133;
}

button {
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 13px;
  font-weight: 600;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
}

.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.muted {
  color: var(--muted);
  margin-top: 10px;
  font-size: 0.95rem;
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.message {
  min-height: 1.3rem;
  margin: 10px 0;
}

.boards {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.board {
  display: grid;
  gap: 2px;
  background: #0a1b2a;
  padding: 6px;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.cell,
.axis {
  height: 26px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 0.82rem;
  border-radius: 4px;
}

.axis {
  color: var(--muted);
  font-weight: 600;
}

.cell {
  border: 1px solid #16334b;
  background: #0e2235;
  color: var(--ink);
}

.cell.ship {
  background: color-mix(in srgb, var(--ship) 30%, #0e2235);
}

.cell.hit {
  background: color-mix(in srgb, var(--hit) 35%, #0e2235);
}

.cell.miss {
  background: color-mix(in srgb, var(--miss) 30%, #0e2235);
}

.cell.targetable {
  cursor: crosshair;
}

.cell.targetable:hover {
  background: #183651;
}

@media (max-width: 700px) {
  .page {
    padding: 14px;
  }

  .lang-bar {
    justify-content: flex-start;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .actions {
    width: 100%;
  }

  .actions button {
    flex: 1;
  }
}