/* ── PUZZLE PAGE ── */
#page-puzzle { flex-direction: column; }
.puzzle-layout {
  flex: 1; display: grid;
  grid-template-columns: 260px 1fr 260px;
  gap: 20px; padding: 20px;
  max-width: 1400px; margin: 0 auto; width: 100%;
}
.puzzle-sidebar-left  { display: flex; flex-direction: column; gap: 14px; }
.puzzle-sidebar-right { display: flex; flex-direction: column; gap: 14px; }
.puzzle-center        { display: flex; flex-direction: column; align-items: center; gap: 12px; }

/* ── Filters ── */
.filter-group { margin-bottom: 14px; }
.filter-label {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  letter-spacing: 0.08em; color: var(--text2); margin-bottom: 8px;
  display: flex; justify-content: space-between; align-items: center;
}
.filter-label span { color: var(--accent); font-weight: 500; }
.range-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.range-input {
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text); padding: 8px 10px;
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  border-radius: 1px; outline: none; width: 100%; text-align: center;
}
.range-input:focus { border-color: var(--accent); }
.range-input:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Start / Next buttons ── */
.btn-group-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 4px; }
.btn-action {
  border: none; padding: 11px 10px;
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  letter-spacing: 0.06em; font-weight: 500;
  border-radius: 1px; cursor: pointer; transition: all 0.15s; white-space: nowrap;
}
.btn-start { background: var(--accent); color: #0d0f0e; }
.btn-start:hover { background: #c9f060; }
.btn-next { background: transparent; color: var(--text2); border: 1px solid var(--border); }
.btn-next:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn-next:disabled { opacity: 0.35; cursor: not-allowed; }

/* ── Lost puzzles button ── */
.btn-lost {
  width: 100%; margin-top: 8px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text2); padding: 10px 14px;
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  letter-spacing: 0.05em; border-radius: 1px;
  cursor: pointer; transition: all 0.15s;
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.btn-lost:hover:not(:disabled) { border-color: var(--danger); color: var(--danger); }
.btn-lost:disabled { opacity: 0.3; cursor: not-allowed; }
.btn-lost.has-items { border-color: #e5505066; color: var(--text); }
.btn-lost.has-items:hover { border-color: var(--danger); color: var(--danger); background: #e5505010; }
.lost-icon { color: var(--danger); }
.lost-count {
  background: var(--danger); color: #fff;
  font-size: 10px; font-weight: 700;
  padding: 1px 7px; border-radius: 10px;
  min-width: 20px; text-align: center;
}
.btn-lost:disabled .lost-count { background: var(--text3); }
.lost-retry-badge {
  background: #e5505015; border: 1px solid #e5505044;
  color: var(--danger); padding: 6px 12px;
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  border-radius: 1px; text-align: center;
}

/* ── Toggle switches ── */
.setting-row { padding-top: 10px; border-top: 1px solid var(--border); }
.toggle-label {
  display: flex; align-items: center; gap: 10px;
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  color: var(--text2); cursor: pointer; user-select: none;
}
.toggle-label input { display: none; }
.toggle-track {
  width: 34px; height: 18px; background: var(--bg3);
  border: 1px solid var(--border); border-radius: 10px;
  position: relative; transition: background 0.2s; flex-shrink: 0;
}
.toggle-thumb {
  position: absolute; top: 2px; left: 2px;
  width: 12px; height: 12px; background: var(--text3);
  border-radius: 50%; transition: all 0.2s;
}
.toggle-label input:checked ~ .toggle-track { background: #2a4010; border-color: var(--accent2); }
.toggle-label input:checked ~ .toggle-track .toggle-thumb { left: 18px; background: var(--accent); }

/* ── Info panel ── */
.info-row {
  display: flex; justify-content: space-between; align-items: center;
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  padding: 7px 0; border-bottom: 1px solid var(--border);
}
.info-row:last-child { border-bottom: none; }
.info-key { color: var(--text3); text-transform: uppercase; letter-spacing: 0.08em; }
.info-val { color: var(--text); }
.info-val.rating-chip {
  background: var(--bg3); padding: 2px 10px;
  border-radius: 1px; border: 1px solid var(--border);
}
.theme-chip {
  display: inline-block; background: rgba(173, 98, 255, 0.14);
  border: 1px solid rgba(173, 98, 255, 0.35); color: var(--accent);
  padding: 2px 8px; border-radius: 1px;
  font-family: 'IBM Plex Mono', monospace; font-size: 10px;
  margin: 2px; text-transform: lowercase;
}

/* ── Board ── */
.board-wrap {
  border: 2px solid var(--border); border-radius: 2px;
  overflow: hidden; box-shadow: 0 0 60px #00000066;
  width: 100%; max-width: 700px; touch-action: none;
}
/* Chessground needs an explicit height — use a square aspect ratio */
#board { width: 100%; aspect-ratio: 1 / 1; display: block; }
.square-selected         { background: rgba(173, 98, 255, 0.45) !important; }
.square-legal            { background: rgba(173, 98, 255, 0.22) !important; }
.square-legal-capture    { background: rgba(229, 80, 80, 0.28) !important; }
.highlight-from          { background: rgba(173, 98, 255, 0.35) !important; }
.highlight-to            { background: rgba(173, 98, 255, 0.45) !important; }

/* ── Puzzle status / tries ── */
.puzzle-status {
  text-align: center; font-family: 'Playfair Display', serif;
  font-size: 17px; font-weight: 700; min-height: 26px; padding: 0 12px;
}
.puzzle-status.correct { color: var(--accent); }
.puzzle-status.wrong   { color: var(--danger); }
.puzzle-status.neutral { color: var(--text2); }
.tries-row { display: flex; gap: 10px; justify-content: center; }
.try-dot {
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid var(--border); background: transparent; transition: all 0.25s;
}
.try-dot.used-correct { background: var(--accent); border-color: var(--accent); }
.try-dot.used-wrong   { background: var(--danger);  border-color: var(--danger); }
.turn-indicator {
  display: flex; align-items: center; gap: 8px;
  font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--text2);
  padding: 8px 14px; background: var(--bg3); border: 1px solid var(--border);
  border-radius: 1px; width: 100%; max-width: 700px;
}
.turn-dot { width: 10px; height: 10px; border-radius: 50%; border: 1px solid #666; }
.turn-dot.white-turn { background: #eee; border-color: #ccc; }
.turn-dot.black-turn { background: #333; border-color: #555; }

/* ── Elo result flash ── */
.elo-result {
  font-family: 'IBM Plex Mono', monospace; font-size: 13px;
  padding: 8px 20px; border-radius: 1px; text-align: center;
  animation: fadeInUp 0.3s ease;
}
.elo-result.gain { color: var(--accent); background: rgba(173, 98, 255, 0.14); border: 1px solid rgba(173, 98, 255, 0.35); }
.elo-result.loss { color: var(--danger);  background: #e5505015; border: 1px solid #e5505030; }

/* ── Solution panel ── */
.moves-list {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  color: var(--text2); line-height: 2.1;
}
.move-num { color: var(--text3); font-size: 10px; min-width: 52px; display: inline-block; }
.move-played   { color: var(--accent); }
.move-solution { color: var(--warn); }
.move-hidden   { color: var(--text3); }
.btn-solve {
  background: transparent; border: 1px solid var(--warn); color: var(--warn);
  padding: 10px 20px; font-family: 'IBM Plex Mono', monospace;
  font-size: 11px; letter-spacing: 0.08em; border-radius: 1px;
  cursor: pointer; width: 100%; transition: all 0.15s; margin-top: 10px;
}
.btn-solve:hover { background: #e5a55015; }
.no-puzzle-msg {
  text-align: center; padding: 28px 10px; color: var(--text3);
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; line-height: 2;
}

/* ── Color filter buttons ── */
.color-btn-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
.color-btn {
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text2); padding: 8px 6px;
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  border-radius: 1px; cursor: pointer; transition: all 0.15s; text-align: center;
}
.color-btn:hover { border-color: var(--accent); color: var(--text); }
.color-btn.active {
  background: rgba(173, 98, 255, 0.18); border-color: var(--accent);
  color: var(--accent); font-weight: 500;
}

/* Mobile Action Buttons Slot */
#puzzle-mobile-actions {
  display: none;
  width: 100%;
  max-width: 700px;
}

@media (max-width: 1100px) {
  .puzzle-layout { grid-template-columns: 240px 1fr; }
  .puzzle-sidebar-right { display: none; }
}
@media (max-width: 720px) {
  .puzzle-layout { grid-template-columns: 1fr; padding: 10px; gap: 12px; }
  .puzzle-sidebar-left { order: 2; }
  .puzzle-center { order: 1; }

  /* Rearranged Start & Next buttons directly under the board on mobile */
  #puzzle-mobile-actions {
    display: block;
    width: 100%;
    margin: 6px 0 2px;
  }
  #puzzle-mobile-actions .btn-group-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    width: 100%;
    margin-top: 0;
  }
  #puzzle-mobile-actions .btn-action {
    padding: 13px 12px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    letter-spacing: 0.04em;
  }
  #puzzle-mobile-actions .btn-start {
    background: var(--accent, #ad62ff);
    color: #0e0c14;
    box-shadow: 0 2px 10px rgba(173, 98, 255, 0.25);
  }
  #puzzle-mobile-actions .btn-next {
    background: var(--bg3, #222);
    border: 1px solid var(--border, rgba(255, 255, 255, 0.15));
    color: var(--text, #fff);
  }
  #puzzle-mobile-actions .btn-next:hover:not(:disabled) {
    border-color: var(--accent, #ad62ff);
    color: var(--accent, #ad62ff);
  }
  #puzzle-desktop-actions:empty {
    display: none;
  }
}