:root {
  color-scheme: dark light;
  --bg: #0f1115;
  --surface: #171a21;
  --border: #2a3140;
  --text: #e8eaed;
  --muted: #9aa3b2;
  --accent: #5b8def;
  --accent-hover: #7aa3f3;
  --danger: #e07070;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
  line-height: 1.45;
}

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

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

.app-shell {
  display: grid;
  gap: 0.065rem;
  padding: 0.65rem 1rem 1rem;
  max-width: 72rem;
  margin: 0 auto;
  align-items: start;
}

.board-geometry-splash {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 0.75rem 1rem 1rem;
}

.board-geometry-splash-card {
  width: min(100%, 72rem);
  display: grid;
  gap: 0.65rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
}

.board-geometry-splash-card h2 {
  margin: 0;
  font-size: clamp(1.35rem, 4vw, 2rem);
}

.eyebrow {
  margin: 0;
  color: var(--accent-hover);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.splash-copy {
  margin: 0;
  max-width: 48rem;
  color: var(--muted);
}

.splash-board-geometry-cards {
  margin-top: 0.25rem;
}

.tabs {
  overflow-x: auto;
}

.tabs [role="tablist"] {
  display: flex;
  gap: 0.4rem;
  min-width: max-content;
  border-bottom: 1px solid var(--border);
}

.tab {
  cursor: pointer;
  border: 1px solid transparent;
  border-bottom: 0;
  background: transparent;
  color: var(--muted);
  padding: 0.45rem 0.7rem;
  border-radius: 8px 8px 0 0;
  font: inherit;
  font-weight: 600;
}

.tab:hover,
.tab:focus-visible {
  color: var(--text);
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.tab[aria-selected="true"] {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 0.85rem;
}

.panel h2 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.placeholder {
  margin: 0;
  max-width: 40rem;
  color: var(--muted);
}

.tutorial-summary {
  margin: 0 0 0.55rem;
  color: var(--muted);
}

.tutorial-summary strong {
  color: var(--text);
}

.tutorial-copy {
  margin: 0 0 0.65rem;
  max-width: 52rem;
  color: var(--muted);
}

.tutorial-copy a {
  color: var(--accent-hover);
  font-weight: 650;
}

.tutorial-layout {
  display: grid;
  grid-template-columns: minmax(15rem, 24rem) minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
}

.tutorial-stage {
  display: grid;
  gap: 0.65rem;
}

.tutorial-board {
  display: grid;
  gap: 0.15rem;
  width: min(100%, 24rem);
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0f1115;
}

.tutorial-tile {
  display: grid;
  place-items: center;
  gap: 0.12rem;
  aspect-ratio: 1;
  min-width: 0;
  border: 1px solid rgba(154, 163, 178, 0.35);
  border-radius: 4px;
  background: #1a202b;
  color: var(--text);
  font-size: clamp(0.62rem, 2.4vw, 0.82rem);
  font-weight: 700;
}

.tutorial-tile[data-tutorial-player-attack="true"] {
  border-color: #ffc857;
  box-shadow: inset 0 0 0 2px rgba(255, 200, 87, 0.8);
}

.tutorial-tile.skipped[data-tutorial-skip-reason="occupied"] {
  outline: 2px dashed rgba(255, 255, 255, 0.8);
  outline-offset: -4px;
}

.tutorial-tile.skipped[data-tutorial-skip-reason="opponent-attacked"] {
  outline: 2px dashed #ffc857;
  outline-offset: -4px;
}

.tutorial-tile[data-tutorial-owner="0"] {
  background: #dc3c46;
  color: #160407;
}

.tutorial-tile[data-tutorial-owner="1"] {
  background: #4682f0;
  color: #04101f;
}

.tutorial-tile.current {
  border-color: #fff5b8;
  box-shadow:
    0 0 0 2px #fff5b8,
    0 0 0 4px rgba(15, 17, 21, 0.8);
}

.tutorial-tile-number {
  line-height: 1;
  text-shadow: 0 1px 1px rgba(255, 255, 255, 0.22);
}

.tutorial-tile-owner {
  font-size: clamp(0.46rem, 1.8vw, 0.62rem);
  font-weight: 800;
  line-height: 1;
  text-transform: uppercase;
}

.tutorial-tile-badge {
  font-size: clamp(0.38rem, 1.5vw, 0.52rem);
  font-weight: 800;
  letter-spacing: 0.03em;
  line-height: 1;
  text-transform: uppercase;
}

.tutorial-step-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.tutorial-explanation {
  display: grid;
  gap: 0.4rem;
  margin: 0;
  padding: 0.65rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #12151c;
  color: var(--muted);
}

.tutorial-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.board-geometry-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.6rem;
  margin-top: 0.65rem;
}

.board-geometry-card {
  display: grid;
  gap: 0.45rem;
  justify-items: start;
  cursor: pointer;
  min-height: 100%;
  padding: 0.65rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #12151c;
  color: var(--text);
  font: inherit;
  text-align: left;
}

.board-geometry-card:hover,
.board-geometry-card:focus-visible {
  border-color: var(--accent);
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.board-geometry-card[aria-pressed="true"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.board-geometry-diagram {
  width: 5rem;
  height: 5rem;
  justify-self: center;
}

.board-geometry-card-title {
  font-weight: 650;
}

.board-geometry-card-copy {
  color: var(--muted);
  font-size: 0.85rem;
}

.diagram-hex.center {
  fill: #24324a;
}

.diagram-hex.side {
  fill: #182237;
}

.piece-catalog {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.custom-piece-creator {
  margin-top: 1rem;
  padding: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #12151c;
}

.custom-piece-creator h3 {
  margin: 0 0 0.65rem;
  font-size: 0.95rem;
}

.custom-piece-form {
  display: grid;
  gap: 0.65rem;
}

.custom-jump-grid {
  display: grid;
  grid-template-columns: repeat(9, minmax(2rem, 1fr));
  gap: 0.2rem;
  max-width: 24rem;
}

.custom-jump-grid button {
  min-width: 0;
  aspect-ratio: 1;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: #1e2430;
  cursor: pointer;
  transition: background-color 80ms ease, border-color 80ms ease, box-shadow 80ms ease;
}

.custom-jump-grid button:not(:disabled):hover,
.custom-jump-grid button:not(:disabled):focus-visible {
  background: #2c3650;
  border-color: var(--accent-hover);
  box-shadow: inset 0 0 0 1px var(--accent-hover);
}

.custom-jump-grid button[aria-selected="true"] {
  background: var(--accent);
  border-color: var(--accent-hover);
}

.custom-jump-grid button[aria-selected="true"]:not(:disabled):hover,
.custom-jump-grid button[aria-selected="true"]:not(:disabled):focus-visible {
  background: var(--accent-hover);
  box-shadow: inset 0 0 0 2px #ffffff;
}

.custom-jump-grid button:disabled {
  cursor: not-allowed;
  background: #0f1115;
  opacity: 0.65;
}

.custom-jump-grid[data-board-geometry="hexagonal"] {
  position: relative;
  display: block;
  max-width: 100%;
}

.custom-jump-grid[data-board-geometry="hexagonal"] button {
  position: absolute;
  aspect-ratio: auto;
  border-radius: 0;
  clip-path: polygon(50% 0, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
}

.piece-card {
  display: grid;
  gap: 0.4rem;
  align-content: start;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #12151c;
}

.piece-card h3,
.piece-card p {
  margin: 0;
}

.piece-card h3 {
  font-size: 0.95rem;
  font-weight: 650;
}

.piece-leap {
  color: var(--muted);
  font-size: 0.8rem;
}

.piece-delete {
  justify-self: start;
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--danger);
  font: inherit;
  font-size: 0.8rem;
  padding: 0.35rem 0.55rem;
}

.piece-delete:hover,
.piece-delete:focus-visible {
  border-color: var(--danger);
  background: rgba(224, 112, 112, 0.12);
  outline: 2px solid var(--danger);
  outline-offset: 1px;
}

.piece-diagram {
  width: 100%;
  max-width: 5.5rem;
  aspect-ratio: 1;
  justify-self: center;
}

.diagram-square.light {
  fill: #232a38;
}

.diagram-square.dark {
  fill: #171d28;
}

.diagram-target {
  fill: var(--accent);
}

.diagram-origin {
  fill: var(--text);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.cycle-mode-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
  margin: 0;
  padding: 0.65rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.cycle-mode-group legend {
  color: var(--muted);
  font-size: 0.875rem;
  padding: 0 0.25rem;
}

.cycle-mode-group label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.custom-cycle-builder {
  display: grid;
  gap: 0.65rem;
  padding: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #12151c;
}

.custom-cycle-builder h3 {
  margin: 0;
  font-size: 0.95rem;
}

.custom-cycle-piece-picker,
.custom-cycle-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.custom-cycle-piece,
.custom-cycle-chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #1e2430;
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
}

.custom-cycle-piece {
  cursor: pointer;
  padding: 0.4rem 0.65rem;
}

.custom-cycle-piece:hover,
.custom-cycle-piece:focus-visible {
  border-color: var(--accent);
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.custom-cycle-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.35rem 0.3rem 0.65rem;
}

.custom-cycle-chip-remove {
  cursor: pointer;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.75rem;
  padding: 0.15rem 0.35rem;
}

.custom-cycle-chip-remove:hover,
.custom-cycle-chip-remove:focus-visible {
  background: var(--border);
  color: var(--text);
  outline: none;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.875rem;
}

.field span {
  color: var(--muted);
}

.field input,
.field select {
  width: 100%;
  padding: 0.45rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #12151c;
  color: var(--text);
  font: inherit;
}

.field input:focus,
.field select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.calculation-parameter-stepper-field {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.calculation-parameter-stepper {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.calculation-parameter-stepper-decrease,
.calculation-parameter-stepper-increase {
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: 0;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #12151c;
  color: var(--text);
  font: inherit;
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
}

.calculation-parameter-stepper-decrease:disabled,
.calculation-parameter-stepper-increase:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.calculation-parameter-stepper-decrease:not(:disabled):hover,
.calculation-parameter-stepper-decrease:not(:disabled):focus-visible,
.calculation-parameter-stepper-increase:not(:disabled):hover,
.calculation-parameter-stepper-increase:not(:disabled):focus-visible {
  background: var(--border);
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.calculation-parameter-stepper-value {
  min-width: 3.5rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--danger);
}

.generated-image-stale-message,
.generated-image-stale-banner {
  color: var(--danger);
}

.generated-image-stale-banner {
  position: absolute;
  z-index: 2;
  left: 0.75rem;
  top: 0.75rem;
  max-width: min(32rem, calc(100vw - 12rem));
  margin: 0;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--danger);
  border-radius: 8px;
  background: rgba(18, 21, 28, 0.9);
  font-size: 0.85rem;
  box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.25);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.calculation-progress {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.35rem;
}

.calculation-progress-bar {
  position: relative;
  width: 100%;
  height: 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: inset 0 1px 2px rgb(0 0 0 / 35%);
  overflow: hidden;
}

.calculation-progress-fill {
  display: block;
  height: 100%;
  width: 0%;
  min-width: 0;
  border-radius: inherit;
  background: var(--accent);
  transition: width 120ms ease;
}

.calculation-progress-fill[data-active="true"] {
  min-width: 2px;
}

.calculation-progress-label {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.btn {
  cursor: pointer;
  border: 1px solid var(--border);
  background: #1e2430;
  color: var(--text);
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  font: inherit;
  font-weight: 500;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.primary {
  background: var(--accent);
  border-color: transparent;
  color: #0b1020;
}

.btn.primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.status {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.status:empty {
  display: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.image-view {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg);
}

.canvas-wrap {
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  background: var(--bg);
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.image-view-viewport {
  width: 100vw;
  height: 100vh;
}

.image-view-actions {
  position: absolute;
  z-index: 1;
  top: 0.75rem;
  right: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 0.5rem;
}

.image-viewport-controls {
  position: absolute;
  z-index: 1;
  right: 0.75rem;
  bottom: 0.75rem;
  display: grid;
  gap: 0.35rem;
}

.image-viewport-control {
  cursor: pointer;
  min-width: 5.75rem;
  min-height: 2.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(18, 21, 28, 0.86);
  color: var(--text);
  box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.25);
  font: inherit;
  font-weight: 600;
}

.image-viewport-control.fit {
  min-width: 5.75rem;
  font-size: 0.85rem;
}

.image-viewport-control:hover,
.image-viewport-control:focus-visible {
  border-color: var(--accent);
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

#board {
  display: block;
  transform-origin: 0 0;
  will-change: transform;
  vertical-align: middle;
}

@media (max-width: 640px) {
  .board-geometry-splash {
    min-height: auto;
    padding: 0.75rem;
  }

  .board-geometry-splash-card {
    padding: 0.9rem;
  }

  .board-geometry-cards {
    grid-template-columns: 1fr;
  }

  .tutorial-layout {
    grid-template-columns: 1fr;
  }

  .custom-jump-grid {
    grid-template-columns: repeat(9, minmax(1.65rem, 1fr));
    max-width: 100%;
  }

  .custom-jump-grid[data-board-geometry="hexagonal"] {
    max-width: 100%;
  }

  .custom-cycle-builder {
    padding: 0.7rem;
  }

  .piece-delete {
    width: 100%;
  }
}