.battleship-tool-layout {
  display: grid;
  grid-template-columns: minmax(280px, .72fr) minmax(0, 1.28fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.battleship-setup-card {
  position: sticky;
  top: 102px;
}

.battleship-form-grid {
  display: grid;
  gap: 1rem;
}

.battleship-form-grid label {
  display: grid;
  gap: .4rem;
  font-weight: 800;
}

.battleship-form-grid input {
  width: 100%;
  min-height: 48px;
  padding: .75rem .85rem;
  color: var(--ink-900);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: .7rem;
}

.battleship-form-help {
  color: var(--ink-500);
  font-size: .9rem;
  font-weight: 400;
}

.battleship-form-actions {
  display: grid;
  gap: .7rem;
  margin-top: 1.25rem;
}

.battleship-form-actions .button {
  width: 100%;
}

#battleship-player-status {
  min-height: 1.5rem;
  margin: 1rem 0 0;
  font-weight: 700;
}

#battleship-player-status[data-status="success"] { color: #137333; }
#battleship-player-status[data-status="warning"] { color: #7a5412; }
#battleship-player-status[data-status="error"] { color: #b42318; }

.battleship-empty-state {
  display: grid;
  place-items: center;
  min-height: 320px;
  padding: 2rem;
  text-align: center;
  border: 2px dashed #cddcff;
  border-radius: var(--radius-lg);
  background: var(--blue-050);
}

.battleship-fleet-panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow);
}

.battleship-fleet-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem 1.25rem;
  background: linear-gradient(145deg, var(--blue-050), #fff);
  border-bottom: 1px solid var(--line);
}

.battleship-fleet-heading h2,
.battleship-fleet-heading p {
  margin-bottom: 0;
}

.battleship-seed-badge {
  display: grid;
  min-width: 9.5rem;
  padding: .65rem .8rem;
  text-align: center;
  border: 1px solid #cddcff;
  border-radius: .8rem;
  background: #fff;
}

.battleship-seed-badge span {
  color: var(--ink-500);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.battleship-seed-badge strong {
  margin-top: .1rem;
  font-size: 1.35rem;
  letter-spacing: .08em;
}

.battleship-grid-wrap {
  overflow-x: auto;
  padding: 1rem;
}

.battleship-grid {
  display: grid;
  grid-template-columns: 2.2rem repeat(10, minmax(46px, 1fr));
  gap: .25rem;
  min-width: 570px;
}

.battleship-axis {
  display: grid;
  place-items: center;
  min-height: 2.2rem;
  color: var(--ink-700);
  font-weight: 900;
}

.battleship-cell {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 50px;
  aspect-ratio: 1;
  padding: .2rem;
  color: var(--ink-900);
  background: #eef7ff;
  border: 1px solid #b9d4ef;
  border-radius: .4rem;
  cursor: pointer;
  font-weight: 900;
}

.battleship-cell:hover {
  background: #dceeff;
}

.battleship-cell.has-ship {
  background: #d9e1ec;
  border-color: #98a2b3;
}

.battleship-cell.is-hit {
  color: #fff;
  background: #b42318;
  border-color: #8e1b13;
}

.battleship-cell.is-miss {
  color: #1746a2;
  background: #fff;
  border-color: #8fb7ff;
}

.battleship-cell-label {
  font-size: .78rem;
}

.battleship-cell-result {
  font-size: .62rem;
  letter-spacing: .04em;
}

.battleship-details {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1rem;
  padding: 0 1rem 1rem;
}

.battleship-details .card {
  box-shadow: none;
}

.battleship-ship-list {
  display: grid;
  gap: .55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.battleship-ship-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .65rem .75rem;
  border: 1px solid var(--line);
  border-radius: .6rem;
}

.battleship-ship-list li.is-sunk {
  color: #8e1b13;
  background: #fff0ee;
  border-color: #f1b1aa;
}

.battleship-ship-list li.is-afloat {
  color: #0f5c2e;
  background: #eaf7ef;
  border-color: #a8d8b9;
}

@media (max-width: 960px) {
  .battleship-tool-layout,
  .battleship-details {
    grid-template-columns: 1fr;
  }

  .battleship-setup-card {
    position: static;
  }
}

@media (max-width: 620px) {
  .battleship-fleet-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .battleship-seed-badge {
    min-width: 0;
  }
}