:root {
  --bg: #f7f2f8;
  --card-bg: #ffffff;
  --accent: #e76f92;
  --accent-soft: #f9d8e3;
  --accent-strong: #d15179;
  --text-main: #3a3144;
  --text-soft: #7a6b88;
  --border-soft: #e2d6ea;
  --shadow-soft: 0 18px 45px rgba(117, 90, 140, 0.18);
  --radius-lg: 24px;
  --radius-md: 16px;
  --transition-fast: 0.18s ease-out;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #ffe9f3 0, #f7f2f8 35%, #f4f5ff 100%);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.app {
  max-width: 980px;
  width: 100%;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
  border-radius: 32px;
  box-shadow: var(--shadow-soft);
  padding: 28px 28px 22px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.header {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.title {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.subtitle {
  margin: 0;
  font-size: 14px;
  color: var(--text-soft);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 32px;
}

.header-restart {
  display: none;
  padding-inline: 14px;
  margin-right: 60px;
}

.main {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  grid-template-areas:
    "status board"
    "promo board"
    "footer board";
  gap: 24px;
  align-items: start;
}

.panel-block {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(226, 214, 234, 0.9);
  padding: 16px 16px 14px;
  width: 100%;
}

.panel-block--status {
  grid-area: status;
}

.panel-title {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 600;
}

.panel-subtitle {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
}

.panel-text {
  margin: 0;
  font-size: 14px;
  color: var(--text-soft);
}

.panel-text.small {
  font-size: 13px;
}

.status {
  margin-top: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
}

.promo-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
  grid-area: promo;
}

.promo-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  background: radial-gradient(circle, #ffe6f0 0, #f9d8e3 40%, #fef0f7 100%);
  color: var(--accent-strong);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.2em;
}

.board-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  grid-area: board;
  width: 100%;
  overflow: hidden;
}

.board {
  display: grid;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1 / 1;
  grid-template-columns: repeat(var(--board-columns, 3), 1fr);
  grid-template-rows: repeat(var(--board-rows, 3), minmax(0, 1fr));
  gap: 10px;
  background: radial-gradient(circle at top left, #ffe3f1 0, #f5e9ff 50%, #fdfbff 100%);
  padding: 18px;
  border-radius: 28px;
  border: 1px solid rgba(226, 214, 234, 0.9);
  box-shadow: none;
}

.board-header {
  width: 100%;
  max-width: 320px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  min-height: 40px;
  margin-bottom: 8px;
}

.board-header--hidden {
  visibility: hidden;
  pointer-events: none;
}

#restartMessage {
  display: none;
}

.cell {
  width: 100%;
  height: 100%;
  padding: 0;
  border-radius: 22px;
  border: 1px solid rgba(210, 191, 230, 0.85);
  background: rgba(255, 255, 255, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 32px;
  font-weight: 700;
  color: var(--accent-strong);
  line-height: 1;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast), border-color var(--transition-fast);
}

.cell:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(180, 152, 206, 0.28);
}

.cell:focus,
.cell:focus-visible {
  outline: none;
}

.cell--o {
  color: #7f6fd9;
}

.cell--win {
  background: radial-gradient(circle, #ffe6f0 0, #f9d8e3 40%, #fff 100%);
  border-color: var(--accent-strong);
}

.cell--disabled {
  cursor: default;
  opacity: 0.75;
  box-shadow: none;
}

/* --- Морской бой --- */

.board--battleship {
  background: #fdfbff;
  padding: 12px;
  border-radius: 24px;
}

.board--battleship .cell {
  border-radius: 6px;
  background: #ffffff;
  border: 1px solid rgba(198, 192, 220, 0.9);
  box-shadow: none;
  font-size: 20px;
  color: #c2b5d8;
}

.board--battleship .cell:hover {
  box-shadow: 0 6px 14px rgba(175, 160, 210, 0.25);
}

.board--battleship .cell--battleship-miss {
  color: #b298c9;
}

.board--battleship .cell--battleship-hit {
  background: radial-gradient(circle at 30% 20%, #e1fbff 0, #9be7ef 50%, #4fc3c7 100%);
  border-color: #00acc1;
  box-shadow: 0 10px 24px rgba(0, 150, 167, 0.45);
  color: #ffffff;
}

.board--battleship .cell--battleship-player {
  background: linear-gradient(135deg, #eef3ff, #dde7ff);
  border-color: #9fb4f0;
  box-shadow: 0 10px 22px rgba(140, 164, 230, 0.55);
}

.board--battleship .cell--battleship-player-hit {
  background: radial-gradient(circle at 30% 20%, #ffe4f1 0, #f39ac8 55%, #e06698 100%);
  border-color: #e06698;
  box-shadow: 0 12px 26px rgba(214, 120, 158, 0.55);
}

.board--battleship .cell--battleship-enemy-shot {
  color: #a5a0c0;
  font-size: 16px;
}

/* --- Шашки --- */

.board--checkers {
  background: radial-gradient(circle at top left, #f6ebff 0, #f1e4ff 45%, #fdfbff 100%);
  padding: 12px;
}

.board--checkers .cell {
  border-radius: 8px;
  border: none;
  box-shadow: none;
  background: transparent;
  cursor: pointer;
  position: relative;
}

.board--checkers .cell--dark {
  background: rgba(120, 96, 160, 0.12);
}

.board--checkers .cell--light {
  background: transparent;
}

.board--checkers .cell--checker-piece::before {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 999px;
  box-shadow: 0 6px 14px rgba(120, 90, 150, 0.35);
  border: 2px solid rgba(255, 255, 255, 0.8);
}

.board--checkers .cell--checker-piece-player::before {
  background: radial-gradient(circle at 30% 20%, #ffe4f1 0, #f39ac8 55%, #e06698 100%);
}

.board--checkers .cell--checker-piece-computer::before {
  background: radial-gradient(circle at 30% 20%, #f1e8ff 0, #b7a5ff 50%, #7f6fd9 100%);
}

.board--checkers .cell--selected::before {
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.9),
    0 0 0 5px rgba(231, 111, 146, 0.8), 0 8px 16px rgba(120, 90, 150, 0.35);
}

.board--checkers .cell--checker-king::before {
  inset: 14%;
  border-width: 3px;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.9),
    0 0 0 5px rgba(217, 132, 170, 0.9), 0 10px 20px rgba(110, 70, 140, 0.7);
}

.board--checkers .cell--checker-king::after {
  content: "♕";
  position: absolute;
  right: 5px;
  top: 2px;
  font-size: 16px;
  color: #fffdf7;
  text-shadow: 0 1px 3px rgba(110, 70, 130, 0.9);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: background var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, #e76f92, #e197c0);
  color: #fff;
  box-shadow: 0 12px 24px rgba(216, 114, 151, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 15px 32px rgba(216, 114, 151, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 8px 18px rgba(216, 114, 151, 0.35);
}

.panel-block--restart {
  grid-area: restart;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}

.panel-block--restart .panel-text {
  margin-bottom: 0;
}

.panel-block--restart .btn {
  margin-top: 2px;
  flex-shrink: 0;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  font-size: 12px;
  color: var(--text-soft);
}

.footer-games {
  margin-top: 4px;
}

.main-footer {
  grid-area: footer;
}

.footer-games-right {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-label {
  white-space: nowrap;
}

.game-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(248, 236, 252, 0.9);
}

.game-toggle__btn {
  border: none;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  background: transparent;
  color: var(--text-soft);
  transition: background var(--transition-fast), color var(--transition-fast),
    box-shadow var(--transition-fast), transform var(--transition-fast);
}

.game-toggle__btn--active {
  background: linear-gradient(135deg, #e76f92, #e197c0);
  color: #fff;
  box-shadow: 0 8px 18px rgba(216, 114, 151, 0.35);
  transform: translateY(-0.5px);
}

/* --- Модальное окно --- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(32, 16, 48, 0.28);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: #ffffff;
  border-radius: 20px;
  padding: 18px 20px 16px;
  max-width: 320px;
  width: calc(100% - 48px);
  box-shadow: 0 22px 55px rgba(71, 38, 104, 0.35);
}

.modal__text {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--text-main);
}

.modal__button {
  width: 100%;
  justify-content: center;
}

.modal__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}

.modal__promo {
  margin: 4px 0 12px;
  padding: 8px 10px;
  border-radius: 14px;
  background: rgba(249, 216, 227, 0.35);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.modal__promo-label {
  font-size: 13px;
  color: var(--text-soft);
}

.modal__promo-code {
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent-strong);
}

@media (max-width: 800px) {
  .app {
    padding: 16px 18px 18px;
  }

  .main {
    grid-template-columns: 1fr;
    grid-template-areas:
      "status"
      "board"
      "footer"
      "promo"
      "restart";
  }

  .promo-block {
    display: none;
  }

  .board {
    padding: 14px;
  }

  .footer {
    justify-content: center;
  }

  .game-toggle {
    justify-content: space-between;
  }

  .header-restart {
    display: none !important;
  }
}

@media (max-width: 480px) {
  body {
    padding: 6px 12px 12px;
  }

  .app {
    border-radius: 20px;
  }

  .title {
    font-size: 24px;
  }

  .board {
    max-width: 240px;
    padding: 10px;
    gap: 8px;
  }

  .cell {
    font-size: 26px;
  }

  .board--battleship .cell {
    font-size: 18px;
  }

  .board--checkers .cell--checker-piece::before {
    inset: 22%;
  }
}