:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #eaf1fb;
  --text: #142033;
  --muted: #637187;
  --line: #d7e1ef;
  --primary: #0f6bff;
  --primary-strong: #0753c7;
  --danger: #ef4444;
  --danger-soft: #fee2e2;
  --success: #10b981;
  --success-soft: #d1fae5;
  --miss: #7ca0c7;
  --ship: #44566d;
  --shadow: 0 18px 45px rgba(20, 32, 51, 0.12);
  --radius: 8px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #07111f;
  --surface: #101c2d;
  --surface-soft: #16263c;
  --text: #ecf4ff;
  --muted: #9db0c8;
  --line: #263a55;
  --primary: #5aa2ff;
  --primary-strong: #8fc0ff;
  --danger: #fb7185;
  --danger-soft: #4c1821;
  --success: #34d399;
  --success-soft: #123b30;
  --miss: #89a8c9;
  --ship: #8ba0ba;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100%;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(15, 107, 255, 0.14), transparent 34rem),
    linear-gradient(180deg, var(--bg), var(--surface-soft));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1220px, calc(100% - 28px));
  margin: 0 auto;
  padding: 22px 0 36px;
}

.topbar,
.panel__header,
.status-bar,
.board-title,
.topbar__actions,
.setup-panel__controls,
.modal__actions {
  display: flex;
  align-items: center;
}

.topbar {
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 0.95;
}

h2 {
  font-size: 1.35rem;
}

h3 {
  font-size: 1rem;
}

.eyebrow {
  margin-bottom: 5px;
  color: var(--primary);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topbar__actions {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.button,
.icon-button,
select {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  background: var(--surface);
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.button {
  min-height: 40px;
  padding: 0 14px;
  font-weight: 800;
}

.icon-button {
  width: 42px;
  height: 42px;
  font-size: 1.15rem;
  font-weight: 900;
}

.button:hover,
.icon-button:hover {
  transform: translateY(-1px);
  border-color: var(--primary);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.button--primary {
  border-color: var(--primary);
  color: #ffffff;
  background: var(--primary);
}

.button--primary:hover {
  background: var(--primary-strong);
}

.button--secondary {
  background: var(--surface-soft);
}

.button--danger {
  border-color: color-mix(in srgb, var(--danger), transparent 45%);
  color: var(--danger);
  background: var(--danger-soft);
}

.button--ghost {
  background: transparent;
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface), transparent 4%);
  box-shadow: var(--shadow);
}

.setup-panel,
.stats-panel {
  padding: 18px;
}

.panel__header {
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.panel__header p {
  margin-top: 5px;
  color: var(--muted);
}

.setup-panel__controls {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.field {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

select {
  height: 40px;
  min-width: 140px;
  padding: 0 10px;
}

.setup-grid,
.battlefields {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) 330px;
  gap: 18px;
  align-items: start;
}

.battlefields {
  grid-template-columns: repeat(2, minmax(280px, 1fr));
}

.board-wrap {
  min-width: 0;
  padding: 14px;
}

.board-title {
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.board-title span {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 800;
}

.board {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 4px;
  width: min(100%, 560px);
  aspect-ratio: 1;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(15, 107, 255, 0.11), transparent),
    var(--surface-soft);
  touch-action: manipulation;
}

.cell {
  position: relative;
  min-width: 0;
  border: 1px solid color-mix(in srgb, var(--line), transparent 8%);
  border-radius: 6px;
  background: color-mix(in srgb, var(--surface), transparent 20%);
  transition: transform 0.14s ease, background 0.14s ease, border-color 0.14s ease;
}

.cell:hover {
  transform: scale(1.04);
  border-color: var(--primary);
}

.cell--ship {
  border-color: color-mix(in srgb, var(--ship), transparent 20%);
  background: linear-gradient(135deg, var(--ship), color-mix(in srgb, var(--ship), #ffffff 22%));
}

.cell--preview {
  border-color: var(--success);
  background: var(--success-soft);
}

.cell--invalid {
  border-color: var(--danger);
  background: var(--danger-soft);
  animation: shake 0.22s ease;
}

.cell--hit,
.cell--miss,
.cell--dead-zone,
.cell--sunk {
  pointer-events: none;
}

.cell--hit,
.cell--sunk {
  border-color: var(--danger);
  background: var(--danger-soft);
  animation: hit 0.32s ease;
}

.cell--hit::after,
.cell--sunk::after {
  content: "×";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--danger);
  font-size: clamp(1.1rem, 4vw, 2rem);
  font-weight: 950;
}

.cell--miss {
  background: color-mix(in srgb, var(--miss), transparent 78%);
  animation: miss 0.3s ease;
}

.cell--miss::after,
.cell--dead-zone::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 22%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--miss);
  transform: translate(-50%, -50%);
}

.cell--dead-zone {
  background: color-mix(in srgb, var(--miss), transparent 88%);
  opacity: 0.8;
}

.cell--sunk {
  box-shadow: inset 0 0 0 2px var(--danger);
  animation: sunk 0.55s ease;
}

.board--target .cell:not(.cell--hit):not(.cell--miss):not(.cell--dead-zone):hover {
  background: color-mix(in srgb, var(--primary), transparent 78%);
}

.fleet-picker {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.fleet-picker h3 {
  margin-bottom: 10px;
}

.fleet-list {
  display: grid;
  gap: 10px;
}

.fleet-item,
.fleet-status__item,
.stat-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.fleet-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 10px;
  color: var(--text);
  text-align: left;
}

.fleet-item.is-active {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary), transparent 82%);
}

.fleet-item.is-done {
  opacity: 0.58;
}

.ship-dots {
  display: flex;
  gap: 4px;
}

.ship-dots i {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: var(--ship);
}

.game-layout {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.status-bar {
  justify-content: space-between;
  gap: 20px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.message-log {
  max-width: 560px;
  color: var(--muted);
  font-weight: 700;
  text-align: right;
}

.fleet-status {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.fleet-status__item {
  padding: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  text-align: center;
}

.fleet-status__item strong {
  display: block;
  color: var(--text);
  font-size: 1rem;
}

.stats-panel {
  margin-top: 18px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(120px, 1fr));
  gap: 10px;
}

.stat-card {
  padding: 12px;
}

.stat-card span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.stat-card strong {
  display: block;
  margin-top: 4px;
  font-size: 1.35rem;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(3, 9, 18, 0.62);
  backdrop-filter: blur(8px);
}

.modal[hidden],
[hidden] {
  display: none !important;
}

.modal__card {
  width: min(440px, 100%);
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.modal__card p:not(.eyebrow) {
  margin: 8px 0 18px;
  color: var(--muted);
}

.modal__card--result {
  text-align: center;
}

.modal__actions {
  justify-content: flex-end;
  gap: 10px;
}

@keyframes hit {
  0% { transform: scale(0.86); }
  65% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

@keyframes miss {
  0% { transform: scale(0.82); opacity: 0.5; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes sunk {
  0%, 100% { filter: saturate(1); }
  50% { filter: saturate(1.8) brightness(1.1); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  33% { transform: translateX(-3px); }
  66% { transform: translateX(3px); }
}

@media (max-width: 980px) {
  .setup-grid,
  .battlefields {
    grid-template-columns: 1fr;
  }

  .board {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100% - 18px, 1220px);
    padding-top: 12px;
  }

  .topbar,
  .panel__header,
  .status-bar {
    align-items: stretch;
    flex-direction: column;
  }

  .topbar__actions,
  .setup-panel__controls,
  .modal__actions {
    justify-content: stretch;
  }

  .button,
  .field,
  select {
    width: 100%;
  }

  .icon-button {
    flex: 1;
  }

  .board-wrap,
  .setup-panel,
  .stats-panel {
    padding: 10px;
  }

  .board {
    gap: 3px;
    padding: 5px;
  }

  .cell {
    border-radius: 4px;
  }

  .message-log {
    max-width: none;
    text-align: left;
  }

  .fleet-status,
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}