:root {
  --cell-size: 44px;
  --gap: 1px;
  --bg: #f4f7fb;
  --board-bg: #1f3b5a;
  --cell: #e3edf9;
  --hit: #d94f4f;
  --sunk: #5a5a63;
  --ship-debug: #5a8ecf;
  --my-ship: #3f7f4f;
  --coord-size: 24px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: linear-gradient(180deg, #f7fbff 0%, var(--bg) 100%);
  color: #122132;
}

.app {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px;
}

h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

h2 {
  margin: 0 0 8px;
  font-size: 22px;
  text-align: center;
}

.hint {
  margin: 0 0 14px;
}

.top-controls {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.starting-turn-badge {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid #2b4b70;
  background: #eef5ff;
  color: #17304d;
  font-weight: 700;
  border-radius: 8px;
}

button {
  padding: 8px 12px;
  border: 1px solid #2b4b70;
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}

button:disabled {
  opacity: 0.55;
  cursor: default;
}

.setup-info {
  font-weight: 600;
  margin-bottom: 14px;
}

.battlefields {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.enemy-panel {
  margin-left: 42px;
}

.board-layout {
  display: grid;
  grid-template-columns: var(--coord-size) auto;
  grid-template-rows: var(--coord-size) auto;
  column-gap: 6px;
  row-gap: 6px;
  width: fit-content;
}

.corner {
  width: var(--coord-size);
  height: var(--coord-size);
}

.column-labels {
  display: grid;
  grid-template-columns: repeat(8, var(--cell-size));
  gap: var(--gap);
}

.row-labels {
  display: grid;
  grid-template-rows: repeat(8, var(--cell-size));
  gap: var(--gap);
}

.coord-label {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 20px;
  line-height: 1;
  color: #4b2cd6;
}

.board {
  display: grid;
  grid-template-columns: repeat(8, var(--cell-size));
  gap: var(--gap);
  background: var(--board-bg);
  width: fit-content;
  border: 1px solid #2b4b70;
  border-radius: 0;
}

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  border: 0;
  background: var(--cell);
  border-radius: 0;
  cursor: pointer;
  padding: 0;
  position: relative;
}

.cell.my-ship {
  background: var(--my-ship);
}

.cell.miss {
  background: var(--cell);
}

.cell.miss::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #000;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.cell.hit {
  background: var(--hit);
}

.cell.sunk {
  background: var(--sunk);
}

.board.show-ships .cell.enemy-ship:not(.hit):not(.sunk) {
  background: var(--ship-debug);
}

.board.disabled {
  pointer-events: none;
  opacity: 0.65;
}

.panel-stats {
  margin-top: 10px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-weight: 600;
}

.panel-stats .is-zero {
  color: #c62828;
}

@media (max-width: 980px) {
  .battlefields {
    flex-direction: column;
    gap: 22px;
  }

  .enemy-panel {
    margin-left: 0;
  }
}

.board-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
}