html {
  height: 100%;
}

body {
  height: 100%;
  background-color: var(--game-color-background);
  color: var(--game-text-color);
  margin: 0;
  padding: 0;
  overflow-y: auto;
}

body.modal-open {
  overflow: hidden;
  overscroll-behavior: none;
}

div {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

/* Header Section */

header {
  display: block;
}

.toolbar-header {
  width: 100%;
  height: var(--header-toolbar-height);
  display: flex;
  align-items: center;
}

.toolbar-section {
  height: 48px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--horizontal-spacing-2);
  position: relative;
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.back-button,
.how-to-modal,
.settings-menu {
  position: relative;
}

.back-button,
.settings-cog-button,
.how-to-question-mark-button {
  width: 35px;
  height: 35px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--icon-color);
  display: inline-flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  padding: 0;
}

.back-button {
  text-decoration: none;
}

.back-button-icon {
  width: 35px;
  height: 35px;
  display: block;
  stroke: currentColor;
}

.settings-cog-icon,
.how-to-question-mark-icon {
  width: 25px;
  height: 25px;
  display: block;
}

/* Settings styles */

:root[data-theme="dark"] .settings-cog-icon,
:root[data-theme="dark"] .how-to-question-mark-icon {
  filter: brightness(0) invert(1);
}

.back-button:focus-visible,
.settings-cog-button:focus-visible,
.how-to-question-mark-button:focus-visible {
  outline: 2px solid var(--settings-border-color);
  outline-offset: 2px;
}

.how-to-dropdown,
.settings-dropdown {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(500px, calc(100vw - 32px));
  background-color: var(--settings-surface-color);
  border: 1px solid var(--settings-border-color);
  border-radius: 12px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
  color: var(--settings-text-color);
  z-index: 200;
  padding: 12px 10px 22px;
  max-height: min(80dvh, 720px);
  overflow-y: auto;
  overscroll-behavior: contain;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.how-to-dropdown::-webkit-scrollbar,
.settings-dropdown::-webkit-scrollbar {
  display: none;
}

.hidden {
  display: none;
}

.settings-close-button {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 28px;
  height: 28px;
  border: 0;
  background: transparent;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  padding: 0;
}

.settings-close-icon {
  width: 16px;
  height: 16px;
  display: block;
}

:root[data-theme="dark"] .settings-close-icon {
  filter: brightness(0) invert(1);
}

.settings-close-button:focus-visible {
  outline: 2px solid var(--settings-border-color);
  outline-offset: 2px;
}

.settings-option {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  cursor: pointer;
  user-select: none;
}

.settings-option:hover {
  background: var(--settings-hover-color);
}

.settings-option-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.settings-option-title {
  line-height: 1.2;
}

.settings-option-subtitle {
  font-size: 0.8rem;
  line-height: 1.2;
  opacity: 0.8;
}

.settings-option input[type="checkbox"] {
  width: 16px;
  height: 16px;
}

.settings-link-button {
  width: 100%;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
}

.how-to-dropdown h2,
.settings-dropdown h2 {
  text-align: center;
  margin: 0 40px 12px;
  line-height: 1.15;
}

.modal-copy {
  display: grid;
  gap: 16px;
  padding: 0 16px 2px;
  line-height: 1.55;
}

.modal-copy p {
  margin: 0;
}

.modal-intro {
  max-width: 38ch;
  font-size: 1rem;
}

.instruction-section {
  display: grid;
  gap: 8px;
  padding: 12px 14px;
  border: 1px solid color-mix(in srgb, var(--settings-border-color) 82%, transparent);
  border-radius: 10px;
  background: color-mix(in srgb, var(--settings-hover-color) 50%, transparent);
}

.instruction-heading {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.2;
}

.instruction-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
}

.instruction-list li {
  padding-left: 2px;
}

.instruction-legend {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px 12px;
  margin-top: 4px;
}

.instruction-legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.instruction-tile,
.instruction-ship-tile {
  width: 22px;
  aspect-ratio: 1 / 1;
  display: inline-flex;
  box-sizing: border-box;
  border-radius: 15%;
  flex: 0 0 auto;
  vertical-align: text-bottom;
  margin: 0 4px;
}

.instruction-tile[data-state="miss"] {
  border: 2px solid var(--miss-tile-color);
  background-color: var(--miss-tile-bg-color);
}

.instruction-tile[data-state="hit"] {
  border: 2px solid var(--hit-tile-color);
  background-color: var(--hit-tile-bg-color);
}

.instruction-ship-tile[data-state="not-found"] {
  border: 2px solid var(--ship-nf-color);
  background-color: var(--ship-nf-bg-color);
}

.instruction-ship-tile[data-state="alive"] {
  border: 2px solid var(--alive-color);
  background-color: var(--alive-bg-color);
}

/* Game Board Styles */

.container {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
}

.game-container {
  position: relative;
  min-height: 100dvh;
}

.game-module {
  width: 100%;
  max-width: var(--game-max-width);
  margin: 20px auto 5px;
  display: flex;
  flex-direction: column;
  min-height: calc(100dvh - var(--header-toolbar-height) - 10px);
}

.game-board-container {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  overflow: hidden;
}

.game-status-message {
  min-height: 48px;
  width: var(--board-width);
  margin: 10px auto;
  padding: 0 4px;
  box-sizing: border-box;
  text-align: center;
  font-weight: 600;
  line-height: 1.2;
}

.game-status-message-primary,
.game-status-message-secondary {
  display: block;
}

.game-status-message-primary {
  font-size: 1.8rem;
}

.game-status-message-secondary {
  margin-top: 2px;
  font-size: 1.1rem;
}

.game-board {
  display: grid;
  grid-template-rows: repeat(7, 1fr);
  grid-gap: 2px;
  padding: 2px;
  box-sizing: border-box;
  width: var(--board-width);
}

.game-board.is-disabled {
  pointer-events: none;
}

.game-row {
  display: grid;
  grid-gap: 2px;
  grid-template-columns: repeat(7, 1fr);
}

.game-tile-container {
  display: block;
  perspective: 500px;
}

.game-tile {
  width: 100%;
  aspect-ratio: 1 / 1;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  vertical-align: middle;
  box-sizing: border-box;
  user-select: none;
  border-radius: 15%;
  cursor: pointer;
  transform: scale(1);
  transform-style: preserve-3d;
  backface-visibility: hidden;
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.game-tile[data-state="empty"] {
  border: 2px solid var(--empty-tile-color);
  background-color: var(--empty-tile-bg-color);
}

.game-tile[data-state="miss"] {
  border: 2px solid var(--miss-tile-color);
  background-color: var(--miss-tile-bg-color);
}

.game-tile[data-state="hit"] {
  border: 2px solid var(--hit-tile-color);
  background-color: var(--hit-tile-bg-color);
}

.game-tile[data-state="revealed"] {
  border: 2px solid var(--ship-nf-color);
  background-color: var(--ship-nf-bg-color);
}

.game-tile:not([aria-disabled="true"]):active,
.game-tile.is-selected {
  transform: scale(0.93);
  background-color: var(--selected-tile-bg-color);
}

.game-tile.is-selected {
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.45);
}

.game-tile.is-firing {
  animation: tile-flip 200ms ease;
}

.game-tile[aria-disabled="true"] {
  cursor: default;
  pointer-events: none;
}

.game-board.is-disabled .game-tile {
  cursor: default;
}

.game-tile:focus-visible {
  outline: 3px solid rgba(255, 255, 255, 0.75);
  outline-offset: 2px;
}

@keyframes tile-flip {
  0% {
    transform: scale(0.93) rotateY(0deg);
  }
  49% {
    transform: scale(0.75) rotateY(89deg);
  }
  50% {
    transform: scale(0.8) rotateY(90deg);
  }
  100% {
    transform: scale(1) rotateY(0deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .game-tile.is-firing {
    animation: none;
  }
}

/* Action Button Styles */

.game-actions-container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  width: var(--board-width);
  margin: 0 auto;
}

.game-action-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: var(--vertical-spacing-2);
}

.game-action-button {
  border: 2px solid var(--sm-btn-border-color);
  background-color: var(--sm-btn-bg-color);
  color: var(--sm-btn-text-color);
  padding: 12px 20px;
  border-radius: 16px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  box-shadow:inset 2px 2px 2px 2px rgb(249, 249, 249, 0.25); 
}

.game-action-button:active {
  transform: scale(0.90);
}

.game-action-button:disabled {
  cursor: default;
  opacity: 0.6;
  box-shadow: none;
  border: 2px solid var(--ship-nf-color);
  background-color: var(--ship-nf-bg-color);
}

/* ship panel styles */

.ships-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1 1 0;
  justify-content: center;
  min-width: 0;
  margin-top: 10px;
}

.fleet {
  display: grid;
  grid-template-rows: repeat(4, auto);
  grid-gap: 2px;
  padding: 2px;
  box-sizing: border-box;
  width: min(130px, 100vw);
}

.fleet-target {
  justify-items: start;
}

.ship {
  display: grid;
  grid-gap: 2px;
  grid-template-columns: repeat(4, 1fr);
  width: 100%;
}

.ship-tile-container {
  display: block;
}

.ship-tile {
  width: 100%;
  aspect-ratio: 1 / 1;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  vertical-align: middle;
  box-sizing: border-box;
  user-select: none;
  border-radius: 15%;
}

.fleet-target .ship-tile[data-state="not-found"] {
  border: 2px solid var(--ship-nf-color);
  background-color: var(--ship-nf-bg-color);
}

.fleet-mine .ship-tile[data-state="life-lost"] {
  border: 2px solid var(--life-lost-color);
  background-color: var(--life-lost-bg-color);
  opacity: 0.45;
}

.fleet-target .ship-tile[data-state="found"] {
  border: 2px solid var(--ship-f-color);
  background-color: var(--ship-f-bg-color);
}

.fleet-mine .ship-tile[data-state="alive"] {
  border: 2px solid var(--alive-color);
  background-color: var(--alive-bg-color);
}

.fleet-mine .ship > :first-child:nth-last-child(3) {
  grid-column: 2;
}

.fleet-mine .ship > :first-child:nth-last-child(2) {
  grid-column: 3;
}

/* Share Button styles */

.share-results-container {
  margin-top: 3px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.share-results-container.hidden {
  display: none;
}

.share-results-feedback {
  margin: 0;
  min-height: 0.5rem;
  font-size: 0.9rem;
}

#share-results-button {
  background-color: var(--share-btn-color);
  border-color: var(--share-border-color);
  color: var(--text-btn-primary);
}

.share-button {
  background: transparent;
  border: 2px solid var(--sm-btn-border-color);
  color: var(--sm-btn-text-color);
  padding: 12px 20px;
  border-radius: 16px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
}

.share-button:focus-visible,
.settings-link-button:focus-visible,
.settings-option input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--settings-border-color);
  outline-offset: 2px;
}