:root {
  --bg: #061824;
  --bg2: #0a3a4d;
  --sea: #0d4f66;
  --sea-light: #14708f;
  --cell: #0e5a72;
  --cell-hover: #1a7a96;
  --text: #e8f4f8;
  --accent: #f0c14b;
  --hit: #d64545;
  --miss: #7eb8c9;
  --ship: #4a6b7c;
  --ship-placed: #5c8a9e;
  --sunk: #8b2e2e;
  --fog: #0a2f3d;
  --valid: rgba(80, 200, 140, 0.45);
  --invalid: rgba(214, 69, 69, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Outfit", sans-serif;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(20, 112, 143, 0.35), transparent 50%),
    radial-gradient(ellipse at 80% 90%, rgba(6, 40, 60, 0.6), transparent 45%),
    linear-gradient(165deg, #031018, var(--bg) 40%, var(--bg2));
  min-height: 100vh;
  color: var(--text);
  -webkit-tap-highlight-color: transparent;
}

.wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px;
}

.hidden {
  display: none !important;
}

.level-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  text-align: center;
}

.level-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.level-header h1,
.header h1 {
  margin: 0;
  font-size: clamp(1.4rem, 4vw, 2rem);
}

.level-screen > p {
  margin: 0 0 24px;
  opacity: 0.9;
}

.level-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: 320px;
}

.level-btn {
  padding: 16px 20px;
  min-height: 44px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: inherit;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.level-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.level-name {
  font-weight: 700;
  font-size: 1.1rem;
}

.level-desc {
  font-size: 0.85rem;
  opacity: 0.85;
}

.help-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.1);
  color: inherit;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
}

.game-screen {
  width: 100%;
  max-width: 920px;
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
}

.header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.level-badge {
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.2);
  font-size: 0.8rem;
  font-weight: 600;
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-left: auto;
  align-items: center;
}

.hud {
  font-weight: 600;
  font-size: 0.9rem;
  max-width: 280px;
}

.btn {
  padding: 10px 14px;
  min-height: 44px;
  border: none;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.25);
  color: inherit;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-large {
  padding: 12px 22px;
}

.btn-rotate {
  min-width: 88px;
  min-height: 44px;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.placement-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.placement-bar.hidden-bar {
  display: none;
}

.ship-tray {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1;
}

.ship-chip {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 8px 10px;
  min-height: 44px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  font-family: inherit;
  cursor: pointer;
}

.ship-chip:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.12);
}

.ship-chip.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.ship-chip.placed {
  opacity: 0.45;
  cursor: default;
}

.ship-chip-name {
  font-weight: 700;
  font-size: 0.8rem;
}

.ship-chip-cells {
  display: flex;
  gap: 2px;
}

.ship-chip-cell {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--ship-placed);
}

.placement-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.boards {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: flex-start;
}

.board-panel {
  flex: 1 1 300px;
  max-width: 420px;
  min-width: 0;
}

.board-title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  opacity: 0.95;
}

.board {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 2px;
  aspect-ratio: 1;
  width: 100%;
  background: var(--sea);
  padding: 4px;
  border-radius: 8px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  user-select: none;
}

.cell {
  aspect-ratio: 1;
  border-radius: 3px;
  background: var(--cell);
  border: none;
  padding: 0;
  cursor: default;
  position: relative;
  min-width: 0;
  min-height: 0;
  font-family: inherit;
  color: inherit;
}

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

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

.cell.preview-valid {
  background: var(--valid);
}

.cell.preview-invalid {
  background: var(--invalid);
}

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

.cell.miss::after {
  content: "";
  position: absolute;
  inset: 28%;
  border-radius: 50%;
  background: var(--miss);
  opacity: 0.85;
}

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

.cell.hit::after {
  content: "";
  position: absolute;
  inset: 22%;
  background: var(--accent);
  clip-path: polygon(10% 0, 50% 35%, 90% 0, 100% 10%, 65% 50%, 100% 90%, 90% 100%, 50% 65%, 10% 100%, 0 90%, 35% 50%, 0 10%);
}

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

.cell.sunk::after {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 2px;
  background: rgba(0, 0, 0, 0.45);
  border: 2px solid var(--accent);
}

.board.combat-target .cell:not(.miss):not(.hit):not(.sunk) {
  cursor: pointer;
}

.board.combat-target .cell:not(.miss):not(.hit):not(.sunk):hover {
  background: var(--cell-hover);
}

.board.placing .cell {
  cursor: pointer;
}

.result-overlay,
.help-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

.result-overlay {
  position: absolute;
  border-radius: 8px;
}

.result-box,
.help-modal {
  background: linear-gradient(160deg, #0a3040, #0d4a5c);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  padding: 24px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

.help-modal {
  text-align: left;
  max-height: 85vh;
  overflow-y: auto;
}

.result-box h2,
.help-header h2 {
  margin: 0 0 8px;
}

.result-box p {
  margin: 0;
  opacity: 0.9;
  line-height: 1.45;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.help-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.help-close {
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  color: inherit;
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.help-body p {
  margin: 0 0 12px;
  line-height: 1.45;
}

.help-body ul {
  margin: 0;
  padding-left: 1.2rem;
  line-height: 1.5;
}

.help-body li {
  margin-bottom: 8px;
}

@media (max-width: 720px) {
  .boards {
    flex-direction: column;
    align-items: stretch;
  }

  .board-panel {
    max-width: none;
    flex: 1 1 auto;
  }

  .hud {
    max-width: 100%;
    width: 100%;
    order: 5;
  }

  .header-actions {
    width: 100%;
  }

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

  .placement-controls {
    justify-content: stretch;
  }

  .placement-controls .btn {
    flex: 1;
  }
}