:root {
  color-scheme: dark;
  --bg: #111418;
  --panel: #1d2329;
  --panel-2: #252d35;
  --line: #39434d;
  --text: #edf3f8;
  --muted: #a9b5bf;
  --water: #18384b;
  --water-hover: #235a72;
  --ship: #64717c;
  --hit: #e0564f;
  --miss: #e5d083;
  --accent: #2fbf9b;
  --accent-2: #f08a4b;
  --focus: #8bd8ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    linear-gradient(135deg, rgba(47, 191, 155, 0.14), transparent 34rem),
    radial-gradient(circle at 82% 12%, rgba(240, 138, 75, 0.13), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

button {
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--accent);
  color: #07120f;
  cursor: pointer;
  font-weight: 750;
  min-height: 42px;
  padding: 0 14px;
}

button:hover:not(:disabled) {
  filter: brightness(1.08);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

button.secondary {
  background: var(--panel-2);
  border-color: var(--line);
  color: var(--text);
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #121820;
  color: var(--text);
  min-height: 42px;
  padding: 0 12px;
  text-transform: uppercase;
}

input:focus,
button:focus-visible,
.cell:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.app {
  width: min(1660px, calc(100% - 28px));
  margin: 0 auto;
  padding: 28px 0;
}

.topbar {
  align-items: end;
  display: flex;
  gap: 18px;
  justify-content: space-between;
  margin-bottom: 18px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin: 0 0 4px;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 4.3rem);
  line-height: 0.95;
}

h2 {
  font-size: 1rem;
}

.mode-switch {
  align-items: center;
  background: rgba(29, 35, 41, 0.86);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  padding: 4px;
}

.mode-button {
  background: transparent;
  color: var(--muted);
}

.mode-button.active {
  background: var(--accent-2);
  color: #1b0d05;
}

.panel {
  background: rgba(29, 35, 41, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.hidden {
  display: none;
}

.result-overlay {
  align-items: center;
  background: rgba(7, 11, 14, 0.5);
  display: flex;
  inset: 0;
  justify-content: center;
  pointer-events: none;
  position: fixed;
  z-index: 20;
}

.result-overlay.hidden {
  display: none;
}

.result-message {
  background: rgba(18, 24, 32, 0.92);
  border: 2px solid var(--accent);
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  color: var(--text);
  font-size: clamp(3.5rem, 12vw, 9rem);
  font-weight: 950;
  line-height: 1;
  padding: 24px 34px 30px;
  text-align: center;
}

.control-row,
.multiplayer-controls {
  align-items: end;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.multiplayer-controls label {
  color: var(--muted);
  display: grid;
  flex: 1 1 190px;
  font-size: 0.78rem;
  font-weight: 800;
  gap: 5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status {
  align-items: center;
  background: #121820;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  display: flex;
  flex: 1 1 260px;
  min-height: 42px;
  padding: 9px 12px;
}

.ship-rack {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr;
  margin: 0;
}

.ship-rack:empty,
.fleet-status:empty {
  display: none;
}

.side-rack {
  align-self: start;
  margin: 0;
}

.layout-rack {
  align-self: start;
}

.ship-choice,
.fleet-item {
  align-items: center;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  display: grid;
  gap: 10px;
  justify-items: start;
  min-height: 50px;
  padding: 7px 9px;
}

.fleet-item {
  align-items: center;
  grid-template-columns: minmax(0, 1fr) auto;
}

.fleet-status {
  display: grid;
  gap: 8px;
}

.ship-choice.active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.ship-choice.placed {
  background: #24362f;
}

.ship-choice span,
.fleet-item span {
  overflow: hidden;
  text-align: left;
  text-overflow: ellipsis;
  white-space: normal;
}

.fleet-item.sunk {
  background: #3a2325;
  border-color: rgba(224, 86, 79, 0.78);
  color: #ffd9d5;
  position: relative;
}

.fleet-item.sunk::after {
  background: rgba(224, 86, 79, 0.86);
  content: "";
  height: 3px;
  left: 8px;
  position: absolute;
  right: 8px;
  top: 50%;
  transform: rotate(-5deg);
}

.fleet-item.sunk .ship-mini {
  background: linear-gradient(180deg, #b64a45, #742522);
}

.ship-shape {
  display: grid;
  grid-auto-flow: column;
  height: 18px;
  min-width: 74px;
}

.ship-mini {
  background: linear-gradient(180deg, #8996a0, #53616d);
  border-block: 1px solid rgba(255, 255, 255, 0.18);
  display: block;
  height: 18px;
  position: relative;
  width: 16px;
}

.ship-mini::after {
  background: rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  content: "";
  height: 4px;
  left: 50%;
  position: absolute;
  top: 6px;
  transform: translateX(-50%);
  width: 4px;
}

.ship-mini-bow {
  border-radius: 999px 3px 3px 999px;
}

.ship-mini-stern {
  border-radius: 3px 999px 999px 3px;
}

.ship-mini-body {
  border-radius: 2px;
}

.ship-shape-submarine {
  display: grid;
  grid-auto-flow: row;
  grid-template-columns: repeat(3, 16px);
  grid-template-rows: repeat(2, 18px);
  height: 36px;
  min-width: 48px;
}

.ship-shape-submarine .ship-mini:nth-child(4) {
  grid-column: 2;
  grid-row: 2;
}

.boards {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(420px, 560px) minmax(610px, 760px);
  justify-content: center;
}

.play-layout {
  align-items: start;
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(240px, 280px) minmax(0, 1fr);
}

.play-layout:has(.layout-rack:empty) {
  grid-template-columns: minmax(0, 1fr);
}

.board-wrap {
  min-width: 0;
}

.board-with-side {
  align-items: start;
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(0, 560px) minmax(165px, 190px);
}

.board-with-side .fleet-status.side-rack {
  width: auto;
}

.board-with-side:has(.side-rack:empty) {
  grid-template-columns: minmax(0, 560px);
}

.board-heading {
  align-items: center;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
}

.board-heading span {
  font-size: 0.86rem;
}

.board {
  aspect-ratio: 1;
  background: #0f151b;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 3px;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  padding: 8px;
  max-width: 560px;
  width: 100%;
}

.cell {
  align-items: center;
  aspect-ratio: 1;
  background: var(--water);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 5px;
  color: var(--text);
  display: flex;
  font-size: clamp(0.9rem, 2.4vw, 1.45rem);
  font-weight: 900;
  justify-content: center;
  min-height: 0;
  padding: 0;
}

.target-board .cell:not(:disabled):hover {
  background: var(--water-hover);
  transform: translateY(-1px);
}

.cell.ship {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.2), transparent 34%),
    linear-gradient(135deg, #7d8994, var(--ship));
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: inset 0 0 0 1px rgba(17, 20, 24, 0.25);
  position: relative;
}

.cell.ship::after {
  background: rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  content: "";
  height: 18%;
  left: 50%;
  position: absolute;
  top: 22%;
  transform: translateX(-50%);
  width: 18%;
}

.cell.ship-horizontal.ship-bow {
  border-radius: 999px 2px 2px 999px;
}

.cell.ship-horizontal.ship-body {
  border-radius: 2px;
}

.cell.ship-horizontal.ship-stern {
  border-radius: 2px 999px 999px 2px;
}

.cell.ship-vertical.ship-bow {
  border-radius: 999px 999px 2px 2px;
}

.cell.ship-vertical.ship-body {
  border-radius: 2px;
}

.cell.ship-vertical.ship-stern {
  border-radius: 2px 2px 999px 999px;
}

.cell.ship.irregular {
  border-radius: 5px;
}

.cell.selected-ship {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.cell.placeable:not(:disabled):hover {
  background: var(--water-hover);
  transform: translateY(-1px);
}

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

.cell.miss {
  background: var(--miss);
  color: #201b05;
}

.cell.sunk {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), transparent 28%),
    linear-gradient(135deg, #8b2724, var(--hit));
  box-shadow:
    inset 0 0 0 2px rgba(255, 255, 255, 0.68),
    0 0 14px rgba(224, 86, 79, 0.4);
  overflow: hidden;
}

.cell.recent-hit {
  outline: 3px solid rgba(255, 245, 170, 0.95);
  outline-offset: 2px;
  position: relative;
  z-index: 3;
  animation: hit-pulse 900ms ease-in-out 3;
}

.cell.sunk::before {
  background: rgba(20, 10, 10, 0.72);
  content: "";
  height: 12%;
  left: -18%;
  position: absolute;
  top: 47%;
  transform: rotate(-24deg);
  width: 136%;
  z-index: 1;
}

.cell.sunk.ship-vertical::before {
  height: 136%;
  left: 44%;
  top: -18%;
  transform: rotate(24deg);
  width: 12%;
}

.cell.sunk::after {
  background: rgba(255, 255, 255, 0.36);
  z-index: 2;
}

@keyframes hit-pulse {
  0% {
    filter: brightness(1);
    box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.4), 0 0 0 rgba(255, 245, 170, 0);
    transform: scale(1);
  }
  35% {
    filter: brightness(1.85);
    box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.9), 0 0 18px rgba(255, 245, 170, 0.9);
    transform: scale(1.05);
  }
  70% {
    filter: brightness(0.9);
    box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.45), 0 0 5px rgba(255, 245, 170, 0.45);
    transform: scale(0.99);
  }
  100% {
    filter: brightness(1);
    box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.35), 0 0 0 rgba(255, 245, 170, 0);
    transform: scale(1);
  }
}

@media (max-width: 1540px) {
  .boards {
    grid-template-columns: minmax(380px, 520px) minmax(560px, 710px);
  }

  .board {
    max-width: 520px;
  }
}

@media (max-width: 1280px) {
  .boards {
    grid-template-columns: minmax(0, 560px);
    justify-content: center;
  }

  .board-with-side {
    grid-template-columns: minmax(0, 560px);
  }

  .board-with-side .fleet-status.side-rack {
    margin-top: 10px;
  }
}

@media (max-width: 780px) {
  .app {
    width: min(100% - 18px, 620px);
    padding: 14px 0;
  }

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

  .mode-switch {
    width: 100%;
  }

  .mode-button {
    flex: 1;
  }

  .boards {
    grid-template-columns: 1fr;
    justify-content: stretch;
  }

  .play-layout {
    grid-template-columns: 1fr;
  }

  .board-with-side .fleet-status.side-rack {
    margin-top: 10px;
    position: static;
    width: auto;
  }

  .panel {
    padding: 10px;
  }

  .board {
    gap: 2px;
    padding: 6px;
  }
}