/* Von Niemann Probe — Chess + Morse interactive widget */

.vnp-chess-widget {
  display: flex;
  gap: 1.5rem;
  margin: 1.5rem 0;
  align-items: stretch;
}

/* Board */
.vnp-board-wrapper {
  flex: 0 0 auto;
  width: min(100%, 340px);
}

.vnp-board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  width: 100%;
  box-sizing: border-box;
  border-radius: 2px;
  overflow: hidden;
  user-select: none;
}

.vnp-square {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  cursor: pointer;
  transition: background 0.1s;
}

.vnp-light { background: #e8dcc8; }
.vnp-dark  { background: #6b8cae; }

[data-md-color-scheme="slate"] .vnp-light { background: #b8c6d4; }
[data-md-color-scheme="slate"] .vnp-dark  { background: #4a6a8a; }

.vnp-square:hover {
  filter: brightness(1.08);
}

.vnp-square.vnp-selected {
  box-shadow: inset 0 0 0 2.5px var(--md-default-fg-color);
}

.vnp-piece {
  font-size: min(4vw, 1.8rem);
  line-height: 1;
  pointer-events: none;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,0.15));
}

.vnp-white-piece { color: #fff; text-shadow: 0 0 2px rgba(0,0,0,0.4); }
.vnp-black-piece { color: #1a1a1a; }

[data-md-color-scheme="slate"] .vnp-white-piece { color: #f0f0f0; }
[data-md-color-scheme="slate"] .vnp-black-piece { color: #111; }

.vnp-file-label,
.vnp-rank-label {
  position: absolute;
  font-size: 0.55rem;
  font-weight: 600;
  opacity: 0.5;
  pointer-events: none;
  line-height: 1;
  font-family: var(--md-text-font-family, sans-serif);
}

.vnp-file-label {
  bottom: 2px;
  right: 3px;
}

.vnp-rank-label {
  top: 2px;
  left: 3px;
}

.vnp-light .vnp-file-label,
.vnp-light .vnp-rank-label { color: #6b8cae; }
.vnp-dark .vnp-file-label,
.vnp-dark .vnp-rank-label { color: #e8dcc8; }

[data-md-color-scheme="slate"] .vnp-light .vnp-file-label,
[data-md-color-scheme="slate"] .vnp-light .vnp-rank-label { color: #4a6a8a; }
[data-md-color-scheme="slate"] .vnp-dark .vnp-file-label,
[data-md-color-scheme="slate"] .vnp-dark .vnp-rank-label { color: #b8c6d4; }

/* Moves panel */
.vnp-moves-panel {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.vnp-moves-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(var(--md-default-fg-color--rgb, 0,0,0), 0.12);
}

.vnp-moves-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  opacity: 0.6;
}

.vnp-reset-btn {
  background: none;
  border: 1px solid rgba(var(--md-default-fg-color--rgb, 0,0,0), 0.2);
  color: var(--md-default-fg-color);
  font-size: 0.7rem;
  padding: 0.2em 0.6em;
  border-radius: 3px;
  cursor: pointer;
  font-family: var(--md-text-font-family, sans-serif);
  transition: border-color 0.15s, opacity 0.15s;
  opacity: 0.6;
}

.vnp-reset-btn:hover {
  opacity: 1;
  border-color: var(--md-default-fg-color);
}

.vnp-moves-list {
  flex: 1;
  overflow-y: auto;
  max-height: 320px;
  scrollbar-width: thin;
}

.vnp-moves-empty {
  font-size: 0.8rem;
  opacity: 0.4;
  font-style: italic;
  padding: 1rem 0;
}

.vnp-move-entry {
  display: grid;
  grid-template-columns: 2rem 3.2rem 1fr;
  gap: 0.4rem;
  padding: 0.3rem 0;
  font-size: 0.82rem;
  line-height: 1.4;
  border-bottom: 1px solid rgba(var(--md-default-fg-color--rgb, 0,0,0), 0.05);
  opacity: 0.55;
  transition: opacity 0.2s;
}

.vnp-move-entry.vnp-move-latest {
  opacity: 1;
}

.vnp-move-num {
  font-weight: 600;
  opacity: 0.5;
  font-variant-numeric: tabular-nums;
}

.vnp-move-notation {
  font-weight: 600;
  font-family: var(--md-code-font-family, monospace);
}

.vnp-move-morse {
  font-family: var(--md-code-font-family, monospace);
  opacity: 0.7;
  word-break: break-all;
  letter-spacing: 0.04em;
}

.vnp-turn-indicator {
  font-size: 0.72rem;
  opacity: 0.45;
  margin-top: 0.5rem;
  font-style: italic;
}

/* Mobile: stack vertically */
@media (max-width: 720px) {
  .vnp-chess-widget {
    flex-direction: column;
  }
  .vnp-board-wrapper {
    width: 100%;
    max-width: 340px;
  }
  .vnp-moves-list {
    max-height: 200px;
  }
}