/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #1a1a1a;
  --bg2: #242424;
  --fg: #e0e0e0;
  --fg2: #999;
  --border: #333;
  --accent: #6ca;
  --move-bg: #2a2a2a;
  --move-active: #3a3a3a;
  --fork-color: #f90;
}

[data-theme="light"] {
  --bg: #f5f5f5;
  --bg2: #fff;
  --fg: #1a1a1a;
  --fg2: #666;
  --border: #ddd;
  --accent: #287;
  --move-bg: #eee;
  --move-active: #ddd;
  --fork-color: #c60;
}

html { font-size: 15px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, monospace;
  background: var(--bg);
  color: var(--fg);
  min-height: 100dvh;
}

/* --- Header --- */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.2rem;
  border-bottom: 1px solid var(--border);
}
header h1 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.header-controls { display: flex; gap: 0.5rem; }

#theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
}
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: none; }

/* --- Layout --- */
main {
  display: flex;
  gap: 1.2rem;
  padding: 1.2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.board-panel { flex: 0 0 auto; }
.side-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  min-width: 0;
}

/* --- Board --- */
.board-wrap {
  position: relative;
  width: min(480px, calc(100vw - 2.4rem));
  aspect-ratio: 1;
  touch-action: none;
  -webkit-overflow-scrolling: auto;
}
#board {
  width: 100%;
  height: 100%;
  touch-action: none;
}
/* Board square colors are set by renderPressure() in JS */
.hide-pieces .piece-417db { opacity: 0 !important; }

/* Hide board until first render to prevent tan flash */
#board { visibility: hidden; }
#board.ready { visibility: visible; }

/* Tap-to-move highlights */
.square-selected { box-shadow: inset 0 0 0 3px rgba(255, 255, 100, 0.8) !important; }
.square-target { box-shadow: inset 0 0 0 3px rgba(100, 255, 100, 0.6) !important; }
.square-target::after {
  content: "";
  display: block;
  width: 30%;
  height: 30%;
  margin: 35%;
  border-radius: 50%;
  background: rgba(100, 255, 100, 0.4);
}

/* --- Playback --- */
.playback {
  margin-top: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
#slider {
  width: 100%;
  accent-color: var(--accent);
  touch-action: none;
}
.playback-buttons {
  display: flex;
  gap: 0.3rem;
  justify-content: center;
}
.playback-buttons button {
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
}
.playback-buttons button:hover { background: var(--move-active); }
#btn-next { transform: scaleX(1); }

.pressure-mode {
  display: flex;
  gap: 1rem;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--fg2);
}
.pressure-mode label { cursor: pointer; }

/* --- Game selector --- */
.game-selector {
  display: flex;
  gap: 0.5rem;
  min-width: 0;
}
.game-selector select {
  flex: 1;
  min-width: 0;
  background: var(--bg2);
  color: var(--fg);
  border: 1px solid var(--border);
  padding: 0.4rem;
  border-radius: 4px;
  font-size: 0.85rem;
  overflow: hidden;
  text-overflow: ellipsis;
}
.game-selector button,
.fork-controls button {
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  white-space: nowrap;
}
.game-selector button:hover,
.fork-controls button:hover { background: var(--move-active); }

/* --- Game info --- */
.game-info {
  font-size: 0.8rem;
  color: var(--fg2);
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
}

/* --- Move list --- */
.move-list {
  flex: 1;
  overflow-y: auto;
  font-size: 0.85rem;
  line-height: 1.6;
  max-height: 50vh;
  padding: 0.4rem 0;
}
.move-row {
  display: flex;
  gap: 0.3rem;
  padding: 0 0.3rem;
}
.move-num {
  color: var(--fg2);
  min-width: 2.2rem;
  text-align: right;
}
.move {
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  cursor: pointer;
  min-width: 4rem;
}
.move:hover { background: var(--move-bg); }
.move.active { background: var(--move-active); font-weight: 600; }
.move.forked { border-left: 2px solid var(--fork-color); }

/* --- Fork controls --- */
.fork-controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0;
  font-size: 0.8rem;
}
.fork-badge {
  color: var(--fork-color);
  font-weight: 600;
}

/* --- Export --- */
.export-row {
  padding: 0.4rem 0;
}
.export-row button {
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  width: 100%;
}
.export-row button:hover { background: var(--move-active); }
dialog label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
}
dialog select {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.3rem;
  font-size: 0.85rem;
}
.export-info {
  font-size: 0.8rem;
  color: var(--fg2);
  margin: 0.4rem 0;
}
.export-progress {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.6rem 0;
}
.export-progress progress {
  flex: 1;
  height: 6px;
  accent-color: var(--accent);
}
#export-pct { font-size: 0.8rem; color: var(--fg2); }

/* --- Status bar --- */
.status-bar {
  font-size: 0.8rem;
  color: var(--fg2);
  padding: 0.4rem 0;
  border-top: 1px solid var(--border);
}

/* --- PGN Dialog --- */
dialog {
  background: var(--bg2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  max-width: 500px;
  width: 90vw;
  margin: auto;
  top: 50%;
  transform: translateY(-50%);
}
dialog::backdrop { background: rgba(0,0,0,0.6); }
dialog h2 { font-size: 1rem; margin-bottom: 0.8rem; }
dialog textarea {
  width: 100%;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.6rem;
  font-family: monospace;
  font-size: 0.8rem;
  resize: vertical;
}
.dialog-buttons {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.8rem;
  justify-content: flex-end;
}
.dialog-buttons button {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.4rem 1rem;
  border-radius: 4px;
  cursor: pointer;
}
.dialog-buttons button:hover { background: var(--move-active); }

/* --- Mobile --- */
@media (max-width: 720px) {
  main {
    flex-direction: column;
    padding: 0.8rem;
  }
  .board-wrap { width: 100%; }
  .move-list { max-height: 30vh; }
}