:root {
  --bg-top: #edf4f6;
  --bg-bottom: #dce9ee;
  --panel: #fcfbf8;
  --line: rgba(40, 72, 87, 0.14);
  --text: #20323d;
  --muted: #596a73;
  --accent: #1e7289;
  --accent-dark: #15566a;
  --sea: #d8eef6;
  --sea-dark: #17617a;
  --ship: #566777;
  --hit: #d64545;
  --miss: #ffffff;
  --sunk: #25323b;
  --shadow: 0 14px 34px rgba(33, 48, 58, 0.1);
  --radius: 26px;
  --board-radius: 28px;
  --cell-size: min(5.3vh, 48px);
  --font-main: "Trebuchet MS", "Segoe UI", Tahoma, sans-serif;
  --font-display: Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  font-family: var(--font-main);
  color: var(--text);
  background: linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

body {
  min-height: 100vh;
  overflow: hidden;
}

.reload-hotspot {
  position: fixed;
  top: 0;
  right: 0;
  width: 96px;
  height: 96px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  opacity: 0.01;
  z-index: 20;
}

.page-shell {
  width: min(1920px, 100vw);
  min-height: 100vh;
  margin: 0 auto;
  padding: 10px 10px 32px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(315px, 390px) minmax(0, 1fr);
  gap: 12px;
  min-height: calc(100vh - 32px);
}

.panel-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 16px;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: auto;
}

.side-main {
  display: grid;
  gap: 12px;
  align-content: start;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-dark);
  font-size: 0.85rem;
  font-weight: 700;
}

.brand-block h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 3.6vw, 4.1rem);
  line-height: 0.92;
}

button {
  border: none;
  border-radius: 18px;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  padding: 15px 16px;
  transition: transform 0.14s ease, box-shadow 0.14s ease, filter 0.14s ease;
}

button:hover,
button:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.02);
  outline: none;
}

.primary-button {
  background: linear-gradient(180deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 16px 26px rgba(30, 114, 137, 0.25);
}

.secondary-button {
  background: #ffffff;
  color: var(--text);
  border: 1px solid var(--line);
  box-shadow: 0 8px 18px rgba(33, 48, 58, 0.06);
}

.exit-link {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: auto;
  min-height: 66px;
  border-radius: 18px;
  background: linear-gradient(180deg, #455560, #29353d);
  color: #ffffff;
  text-decoration: none;
  font-size: 1.15rem;
  font-weight: 700;
  box-shadow: 0 12px 22px rgba(33, 48, 58, 0.2);
}

.exit-link:hover,
.exit-link:focus-visible {
  filter: brightness(1.04);
  outline: none;
}

.actions-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.action-wide {
  grid-column: 1 / -1;
}

.stats-card h2,
.info-card h2,
.sea-block h2 {
  font-size: 1.1rem;
  margin: 0 0 8px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.stat-box {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #ffffff;
  padding: 10px 12px;
  min-width: 0;
}

.stat-label {
  display: block;
  color: var(--muted);
  margin-bottom: 4px;
}

.stat-box strong {
  font-size: 1.45rem;
  line-height: 1;
}

.turn-box {
  grid-column: 1 / -1;
  background: #e9f6f8;
  border-color: rgba(30, 114, 137, 0.35);
}

.turn-box strong {
  color: var(--accent-dark);
  font-size: 1.65rem;
}

.info-card p,
.status-message {
  margin: 0;
  color: var(--muted);
  line-height: 1.4;
}

.info-card p + p {
  margin-top: 8px;
}

.board-panel {
  display: grid;
  place-items: center;
  overflow: hidden;
}

.seas {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, max-content));
  gap: 18px;
  align-items: start;
  justify-content: center;
  width: 100%;
  max-width: 100%;
}

.sea-block {
  display: grid;
  gap: 8px;
  justify-items: center;
}

.sea-block h2 {
  color: var(--accent-dark);
}

.sea-board {
  display: grid;
  grid-template-columns: repeat(10, var(--cell-size));
  grid-template-rows: repeat(10, var(--cell-size));
  gap: 3px;
  padding: 14px;
  border-radius: var(--board-radius);
  background: linear-gradient(180deg, #2b8fab, var(--sea-dark));
  border: 4px solid rgba(255, 255, 255, 0.18);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.08);
}

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  display: grid;
  place-items: center;
  padding: 0;
  border-radius: 9px;
  background: linear-gradient(180deg, #e7f7fb, var(--sea));
  border: 1px solid rgba(16, 79, 99, 0.15);
  color: var(--text);
  font-size: clamp(1.55rem, 3.5vh, 2.4rem);
  line-height: 1;
}

.cell.ship {
  background: linear-gradient(180deg, #7a8894, var(--ship));
  color: #ffffff;
}

.cell.enemy-hit {
  background: linear-gradient(180deg, #ff817e, var(--hit));
  color: #ffffff;
  box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.35), 0 0 0 4px rgba(214, 69, 69, 0.18);
}

.cell.player-hit {
  background: linear-gradient(180deg, #f9fafb, #d9e6ea);
  color: #25323b;
  box-shadow: inset 0 0 0 3px rgba(37, 50, 59, 0.22), 0 0 0 4px rgba(37, 50, 59, 0.12);
}

.cell.miss {
  background: linear-gradient(180deg, #f5fbff, #bde4f1);
  color: #17617a;
  box-shadow: inset 0 0 0 3px rgba(23, 97, 122, 0.18);
}

.cell.enemy-sunk {
  background: linear-gradient(180deg, #ff817e, var(--hit));
  color: #ffffff;
}

.cell.player-sunk {
  background: linear-gradient(180deg, #4b5962, var(--sunk));
  color: #ffffff;
}

.cell:disabled {
  cursor: default;
}

.cell.recent-shot {
  animation: shotPulse 0.85s ease-out 2;
  outline: 4px solid #ffe28a;
  outline-offset: 2px;
}

@keyframes shotPulse {
  0% { transform: scale(1); }
  45% { transform: scale(1.13); }
  100% { transform: scale(1); }
}

@media (max-width: 1380px) {
  :root {
    --cell-size: min(4.75vh, 43px);
  }

  .seas {
    gap: 12px;
  }

  .sea-board {
    gap: 2px;
    padding: 12px;
  }
}

@media (max-width: 1080px) {
  body {
    overflow: auto;
  }

  .layout,
  .seas {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .actions-block,
  .stat-grid {
    grid-template-columns: 1fr;
  }

  :root {
    --cell-size: min(8.3vw, 48px);
  }
}

@media (max-width: 720px) {
  :root {
    --cell-size: min(7.4vw, 36px);
  }

  .page-shell {
    width: min(100%, calc(100% - 16px));
    padding: 10px 8px;
  }

  .panel-card,
  .sea-board {
    padding: 12px;
  }
}