:root {
  --play-bg: #080b1e;
  --play-text: #e8eaf0;
  --play-text-muted: rgba(232,234,240,0.7);
  --play-text-dim: rgba(232,234,240,0.5);
  --play-text-faint: rgba(232,234,240,0.35);
  --play-border: rgba(255,255,255,0.08);
  --play-border-hover: rgba(255,255,255,0.2);
  --play-border-accent: rgba(111,181,255,0.3);
  --play-surface: rgba(255,255,255,0.04);
  --play-surface-hover: rgba(255,255,255,0.07);
  --play-surface-active: rgba(111,181,255,0.12);
  --play-accent: #6fb5ff;
  --play-accent-dim: rgba(111,181,255,0.15);
  --play-radius: 6px;
  --play-panel-w: 260px;
  --play-transition: 150ms ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--mg-font-body, 'Barlow', system-ui, sans-serif);
  background: var(--play-bg);
  color: var(--play-text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--mg-font-display, 'Rajdhani', system-ui, sans-serif);
}

/* ─── App Shell: full-height 3-column layout with status row ─── */
#app {
  display: grid;
  grid-template-columns: var(--play-panel-w) 1fr var(--play-panel-w);
  grid-template-rows: auto 1fr;
  flex: 1;
  min-height: 0;
  width: 100%;
}

/* ─── Left Panel: game selection, full height ─── */
#sidebar {
  display: flex;
  flex-direction: column;
  padding: 16px 16px;
  border-right: 1px solid var(--play-border);
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
  background: rgba(0,0,0,0.15);
}

#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-track { background: transparent; }
#sidebar::-webkit-scrollbar-thumb { background: var(--play-border-hover); border-radius: 2px; }

#variant-picker {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  min-height: 0;
}

.mode-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--play-surface);
  border-radius: var(--play-radius);
  padding: 3px;
}

.mode-btn {
  padding: 8px 6px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--play-text-muted);
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--play-transition);
  white-space: nowrap;
  text-align: center;
}

.mode-btn:hover { color: var(--play-text); background: var(--play-surface-hover); }
.mode-btn--active { background: var(--play-accent-dim); color: var(--play-accent); }

.color-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--play-surface);
  border-radius: var(--play-radius);
  padding: 3px;
}

.color-btn {
  padding: 6px 6px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--play-text-dim);
  font-size: 11px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--play-transition);
  white-space: nowrap;
  text-align: center;
}

.color-btn:hover { color: var(--play-text); }
.color-btn--active { background: var(--play-accent-dim); color: var(--play-accent); }

.variant-search {
  padding: 8px 10px;
  border: 1px solid var(--play-border);
  border-radius: var(--play-radius);
  background: var(--play-surface);
  color: var(--play-text);
  font-size: 12px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--play-transition);
  width: 100%;
}

.variant-search::placeholder { color: var(--play-text-faint); }
.variant-search:focus { border-color: var(--play-accent); }

.variant-list-wrap {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-right: 4px;
}

.variant-list-wrap::-webkit-scrollbar { width: 3px; }
.variant-list-wrap::-webkit-scrollbar-track { background: transparent; }
.variant-list-wrap::-webkit-scrollbar-thumb { background: var(--play-border-hover); border-radius: 2px; }

.variant-group-header {
  padding: 8px 8px 4px;
  border: none;
  background: transparent;
  color: var(--play-text-faint);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  text-align: left;
  transition: color var(--play-transition);
  margin-top: 8px;
  font-family: inherit;
}

.variant-group-header:first-child { margin-top: 0; }
.variant-group-header:hover { color: var(--play-text-muted); }
.variant-group-header--open { color: var(--play-text-muted); }

.variant-list { display: flex; flex-direction: column; gap: 1px; }

.variant-btn {
  padding: 5px 10px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--play-text-muted);
  font-size: 12px;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: all var(--play-transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.variant-btn:hover { background: var(--play-surface-hover); color: var(--play-text); }
.variant-btn--active { background: var(--play-accent-dim); color: var(--play-accent); font-weight: 600; }

/* ─── Center: board fills remaining space ─── */
#center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px 24px;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
}


#board-container {
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.04);
}

#board-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0 6px;
  gap: 8px;
  margin: 0 auto;
}

.toolbar-group { display: flex; align-items: center; gap: 6px; }

.toolbar-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--play-text);
  font-family: var(--mg-font-display);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

#board-toolbar .toolbar-group:first-child {
  flex: 1;
  min-width: 0;
}

.toolbar-mode {
  font-size: 11px;
  color: var(--play-text-muted);
  margin-left: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 600px) {
  .toolbar-mode { display: none; }
}


.toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--play-border);
  border-radius: var(--play-radius);
  background: var(--play-surface);
  color: var(--play-text-muted);
  font-size: 15px;
  cursor: pointer;
  transition: all var(--play-transition);
}

.toolbar-btn:hover {
  background: var(--play-surface-hover);
  color: var(--play-text);
  border-color: var(--play-border-hover);
}

#board-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding: 6px 0 0;
  margin: 0 auto;
}

.ctrl-group { display: flex; gap: 6px; align-items: center; }

.ctrl-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--play-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ctrl-btn {
  padding: 7px 14px;
  border: 1px solid var(--play-border);
  border-radius: var(--play-radius);
  background: var(--play-surface);
  color: var(--play-text-muted);
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--play-transition);
}

.ctrl-btn:hover {
  background: var(--play-surface-hover);
  color: var(--play-text);
  border-color: var(--play-border-hover);
}

.ctrl-btn:disabled { opacity: 0.3; cursor: default; pointer-events: none; }

.ctrl-btn--primary {
  background: var(--play-accent-dim);
  border-color: var(--play-border-accent);
  color: var(--play-accent);
}

.ctrl-btn--primary:hover { background: rgba(111,181,255,0.2); }

.ctrl-select {
  padding: 7px 10px;
  border: 1px solid var(--play-border);
  border-radius: var(--play-radius);
  background: var(--play-surface);
  color: var(--play-text-muted);
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--play-transition);
}

.ctrl-select:hover { border-color: var(--play-border-hover); color: var(--play-text); }

#status {
  grid-column: 1 / -1;
  padding: 8px 24px;
  background: rgba(245,183,77,0.12);
  border-bottom: 1px solid rgba(245,183,77,0.25);
  font-size: 15px;
  font-weight: 700;
  font-family: var(--mg-font-display);
  color: #f5b74d;
  text-align: center;
  letter-spacing: 0.02em;
}

/* ─── Right Panel: info, moves, settings ─── */
#right-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px 16px;
  border-left: 1px solid var(--play-border);
  overflow-y: auto;
  min-height: 0;
  font-size: 12px;
  background: rgba(0,0,0,0.15);
}

#right-panel::-webkit-scrollbar { width: 4px; }
#right-panel::-webkit-scrollbar-track { background: transparent; }
#right-panel::-webkit-scrollbar-thumb { background: var(--play-border-hover); border-radius: 2px; }

#description h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--play-text);
  margin: 0 0 4px;
}

#description p {
  margin: 0 0 6px;
  color: var(--play-text-muted);
  font-size: 12px;
  line-height: 1.5;
}

#description .desc-rule {
  font-family: var(--mg-font-mono);
  font-size: 11px;
  color: var(--play-text-dim);
  padding: 6px 8px;
  background: var(--play-surface);
  border-radius: 4px;
  line-height: 1.5;
}

#moves {
  font-family: var(--mg-font-mono);
  font-size: 11px;
  color: var(--play-text-dim);
  flex: 1;
  min-height: 80px;
  overflow-y: auto;
  line-height: 1.6;
}

#moves div { padding: 1px 0; }
#moves::-webkit-scrollbar { width: 3px; }
#moves::-webkit-scrollbar-track { background: transparent; }
#moves::-webkit-scrollbar-thumb { background: var(--play-border-hover); border-radius: 2px; }

/* ─── Settings Section (bottom of right panel) ─── */
#settings-section {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--play-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.settings-toggle {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  width: 100%;
  padding: 6px 0;
  border: none;
  background: transparent;
  color: var(--play-text-muted);
  font-size: 11px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: color var(--play-transition);
}

.settings-toggle:hover { color: var(--play-text); }

.settings-chevron {
  font-size: 10px;
  color: var(--play-text-faint);
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.settings-row-label {
  font-size: 11px;
  color: var(--play-text-dim);
  font-weight: 500;
}

.settings-select {
  padding: 4px 8px;
  border: 1px solid var(--play-border);
  border-radius: 4px;
  background: var(--play-surface);
  color: var(--play-text-muted);
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
  min-width: 90px;
}

.settings-select:hover { border-color: var(--play-border-hover); color: var(--play-text); }
.settings-select:focus { border-color: var(--play-accent); outline: none; }

/* ─── Captured Pieces ─── */
#captured { display: flex; flex-direction: column; gap: 4px; }

.captured-row { display: flex; align-items: center; gap: 1px; flex-wrap: wrap; }

.captured-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--play-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-right: 4px;
  min-width: 32px;
}

.captured-piece {
  display: block;
  border-radius: 50%;
  padding: 1px;
}

.captured-row:first-child .captured-piece {
  background: rgba(255,255,255,0.75);
}

.captured-row:last-child .captured-piece {
  background: #1a1a2e;
}

/* ─── Hand Panel (Crazyhouse) ─── */
#hand-panel { display: flex; flex-direction: column; gap: 6px; }
#hand-panel:empty { display: none; }

.hand-row { display: flex; align-items: center; gap: 3px; flex-wrap: wrap; }

.hand-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--play-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-right: 4px;
  min-width: 32px;
}

.hand-piece {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--play-surface);
  border: 2px solid transparent;
  border-radius: 4px;
  padding: 2px;
  cursor: pointer;
  transition: border-color var(--play-transition), transform var(--play-transition);
}

.hand-piece:hover:not(:disabled) { border-color: var(--play-accent); transform: scale(1.1); }
.hand-piece--active { border-color: var(--play-accent); background: var(--play-accent-dim); box-shadow: 0 0 8px rgba(111,181,255,0.3); }
.hand-piece:disabled { cursor: default; opacity: 0.4; }

.hand-count {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--play-accent);
  color: #080b1e;
  font-size: 9px;
  font-weight: 700;
  min-width: 14px;
  height: 14px;
  line-height: 14px;
  text-align: center;
  border-radius: 7px;
  padding: 0 3px;
}


/* ─── Promotion Dialog ─── */
.promo-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 150ms ease;
}

.promo-panel {
  background: #0f1235;
  border: 1px solid var(--play-border-hover);
  border-radius: 12px;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
}

.promo-panel__title {
  font-size: 11px;
  font-weight: 700;
  color: var(--play-text-faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.promo-panel__pieces { display: flex; gap: 8px; }

.promo-piece-btn {
  width: 52px;
  height: 52px;
  border: 1px solid var(--play-border);
  border-radius: 8px;
  background: var(--play-surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  transition: all var(--play-transition);
}

.promo-piece-btn:hover,
.promo-piece-btn:focus-visible {
  background: var(--play-accent-dim);
  border-color: var(--play-accent);
  transform: scale(1.08);
  outline: none;
}

.promo-piece-btn:active { transform: scale(0.95); }
.promo-piece-btn svg { width: 100%; height: 100%; display: block; }

/* ─── Debug Panel ─── */
.debug-panel {
  background: var(--play-surface);
  border: 1px solid var(--play-border);
  border-radius: var(--play-radius);
  padding: 10px 12px;
  font-size: 11px;
  line-height: 1.5;
}

.debug-panel h4 {
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--play-text);
  border-bottom: 1px solid var(--play-border);
  padding-bottom: 4px;
}

.debug-row { display: flex; gap: 4px; color: var(--play-text-muted); flex-wrap: wrap; }
.debug-row span:first-child { color: var(--play-text-dim); min-width: 60px; font-weight: 600; }
.debug-row code { background: rgba(255,255,255,0.06); padding: 0 3px; border-radius: 2px; font-family: var(--mg-font-mono); }
.debug-warn { color: #ffab40; font-style: italic; margin-top: 4px; }

/* ─── Fullscreen ─── */
.fullscreen-mode { overflow: hidden; }
.fullscreen-exit {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 10000;
  padding: 8px 16px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--play-radius);
  font-family: var(--mg-font-body);
  font-size: 12px;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.2s;
}
.fullscreen-exit:hover { opacity: 1; }

/* ─── Embed ─── */
.embed-mode #center { display: flex !important; flex-direction: column; align-items: center; width: 100%; }
.embed-mode #app { display: block; width: 100%; padding: 0; }
.embed-mode #board-container { box-shadow: none; }

/* ─── Animation ─── */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ─── Responsive: Tablet & Mobile (<960px) ─── */
@media (max-width: 960px) {
  body { height: auto; overflow-y: auto; overflow-x: hidden; }

  #app {
    display: flex;
    flex-direction: column;
    min-height: 0;
  }

  #status {
    padding: 6px 16px;
    border-bottom: 1px solid var(--play-border);
  }

  /* Sidebar: compact mobile picker */
  #sidebar {
    border-right: none;
    border-bottom: 1px solid var(--play-border);
    padding: 8px 16px;
    background: none;
    overflow: visible;
  }

  #variant-picker { gap: 6px; }

  .variant-search,
  .variant-list-wrap,
  .color-bar {
    display: none;
  }

  .mobile-picker-row {
    display: flex;
    gap: 6px;
    align-items: center;
  }

  .mobile-picker-row .mode-bar {
    display: flex;
    gap: 2px;
    background: var(--play-surface);
    border-radius: var(--play-radius);
    padding: 3px;
    flex: 1;
  }

  .mobile-picker-row .mode-bar .mode-btn:nth-child(3) {
    margin-left: auto;
  }

  .mobile-picker-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--play-surface);
    border-radius: var(--play-radius);
    padding: 4px 6px;
  }

  .mobile-picker-arrow {
    border: none;
    background: transparent;
    color: var(--play-text-muted);
    font-size: 14px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all var(--play-transition);
  }

  .mobile-picker-arrow:hover {
    background: var(--play-surface-hover);
    color: var(--play-text);
  }

  .mobile-picker-select {
    border: 1px solid var(--play-border);
    border-radius: 4px;
    background: var(--play-surface);
    color: var(--play-text-muted);
    font-size: 11px;
    font-family: inherit;
    padding: 4px 6px;
    cursor: pointer;
  }

  .mobile-picker-current {
    flex: 1;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--play-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* Center: board scales to viewport width */
  #center {
    padding: 12px 16px;
    overflow: visible;
  }

  #board-container {
    width: calc(100vw - 32px) !important;
    max-width: 560px;
    height: auto !important;
  }

  #board-container svg {
    width: 100%;
    height: auto;
    display: block;
    touch-action: manipulation;
  }

  #board-toolbar,
  #board-controls {
    width: calc(100vw - 32px) !important;
    max-width: 560px;
  }

  /* Right panel: vertical stack below board */
  #right-panel {
    border-left: none;
    border-top: 1px solid var(--play-border);
    padding: 12px 16px;
    background: none;
    overflow-y: visible;
    max-height: none;
    gap: 10px;
  }

  #right-panel #moves { max-height: 120px; }
  #settings-section { margin-top: 8px; }
}

/* ─── Responsive: Small mobile (<500px) ─── */
@media (max-width: 500px) {
  .site-nav__links a:not(.active) { display: none; }

  #status { font-size: 12px; padding: 5px 12px; }

  #sidebar { padding: 8px 12px; }

  .mode-bar, .color-bar { max-width: 100%; }

  .variant-list-wrap { max-height: 20vh; }
  .variant-btn { font-size: 13px; padding: 6px 10px; }
  .variant-group-header { font-size: 11px; }

  #center { padding: 8px; }

  #board-container {
    width: calc(100vw - 16px) !important;
    max-width: none;
  }

  #board-toolbar,
  #board-controls {
    width: calc(100vw - 16px) !important;
    max-width: none;
  }

  .ctrl-btn { padding: 6px 10px; font-size: 11px; }
  .ctrl-select { font-size: 11px; padding: 6px 8px; }
  .ctrl-label { font-size: 10px; }

  #right-panel { padding: 10px 12px; }

  .promo-panel { max-width: calc(100vw - 24px); }
  .promo-piece-btn { width: 44px; height: 44px; }
}

/* ─── Utility / legacy compat ─── */
.toolbar-select {
  padding: 4px 8px;
  border: 1px solid var(--play-border);
  border-radius: 4px;
  background: var(--play-surface);
  color: var(--play-text-muted);
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
}

.toolbar-select:hover { border-color: var(--play-border-hover); color: var(--play-text); }

.advanced-popup {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  padding: 10px 12px;
  background: var(--play-bg);
  border: 1px solid var(--play-border);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  z-index: 100;
  min-width: 180px;
}

.popup-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 4px 0;
}

.popup-row-label {
  font-size: 12px;
  color: var(--play-text-muted);
}

.toolbar-group { position: relative; }

/* Footer: pin to bottom when viewport allows */
.site-footer { display: none; }