/* ══════════════════ FAILED PUZZLES MASTERY CSS ══════════════════ */

#page-failed-puzzles {
  overflow-x: hidden;
  touch-action: manipulation;
}

.failed-puzzles-workspace-container {
  max-width: 1350px;
  margin: 0 auto;
  padding: 10px 24px 20px 24px;
  width: 100%;
  box-sizing: border-box;
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

.fp-tag-badge {
  font-size: 11px;
  font-family: 'IBM Plex Mono', monospace;
  background: rgba(201, 168, 76, 0.15);
  color: var(--accent);
  border: 1px solid rgba(201, 168, 76, 0.3);
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 600;
  margin-left: 10px;
  vertical-align: middle;
}

@media (max-width: 600px) {
  .fp-tag-badge {
    display: none;
  }
}

.fp-tag-label {
  font-size: 12px;
  color: var(--text3);
  font-family: 'IBM Plex Mono', monospace;
}

.fp-timer-pill {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px;
  background: var(--bg);
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  color: var(--text);
}

/* ── Active Trainer Split Workspace (Strict 2-Column Grid: Left=Board, Right=Info) ── */
.fp-trainer-workspace {
  display: grid !important;
  grid-template-columns: minmax(0, 1.4fr) minmax(320px, 380px) !important;
  gap: 28px !important;
  align-items: start;
  width: 100%;
  box-sizing: border-box;
}

@media (max-width: 800px) {
  .failed-puzzles-workspace-container {
    padding: 8px 12px 20px 12px;
  }

  .fp-trainer-workspace {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }
}

/* ── Left Column: Large Chess Board Pane ── */
.fp-board-pane {
  width: 100%;
  max-width: min(calc(100vh - 140px), 660px);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-sizing: border-box;
}

@media (max-width: 800px) {
  .fp-board-pane {
    max-width: 100%;
    width: 100%;
  }
}

.fp-board-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-bottom: 8px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
}

.fp-board-container {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: #2b2622;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  position: relative;
  touch-action: manipulation;
}

.fp-board-container .cg-wrap {
  width: 100%;
  height: 100%;
  touch-action: manipulation;
}

/* ── Action Controls Under Board ── */
.fp-board-actions {
  display: flex;
  gap: 8px;
  width: 100%;
  margin-top: 10px;
  box-sizing: border-box;
}

@media (max-width: 800px) {
  .fp-board-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    width: 100%;
  }
}

.fp-action-btn {
  flex: 1;
  padding: 9px 10px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all 0.15s ease;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  box-sizing: border-box;
  touch-action: manipulation;
}

.fp-action-btn:hover {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.05);
}

.fp-next-btn {
  flex: 1.5;
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
  font-weight: 700;
  animation: pulse-next-btn 1.5s infinite;
  transform: translateZ(0); /* Hardware accelerated without layout shifts */
}

@media (max-width: 800px) {
  .fp-next-btn {
    grid-column: 1 / -1;
    width: 100%;
  }
}

/* Safe glow pulse animation without transform scaling to prevent mobile zoom */
@keyframes pulse-next-btn {
  0% { box-shadow: 0 0 0 0 rgba(201, 168, 76, 0.4); }
  50% { box-shadow: 0 0 12px 3px rgba(201, 168, 76, 0.6); }
  100% { box-shadow: 0 0 0 0 rgba(201, 168, 76, 0.4); }
}

/* ── Right Column: Stacked Info & Stats Pane (Aside / Beside Board) ── */
.fp-info-pane {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-sizing: border-box;
}

/* ── Mini Stats 2x2 Grid ── */
.fp-mini-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  width: 100%;
}

.fp-mini-stat {
  background: var(--surface, #14121d);
  border: 1px solid var(--border, #2c273d);
  border-radius: 10px;
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: border-color 0.15s ease;
}

.fp-mini-stat:hover {
  border-color: var(--accent);
}

.fp-mini-stat-lbl {
  font-size: 10.5px;
  color: var(--text3, #56506d);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  font-weight: 600;
}

.fp-mini-stat-val {
  font-size: 16px;
  font-weight: 700;
  color: var(--text, #ece8f5);
  font-family: 'IBM Plex Mono', monospace;
}

/* ── Side Card Container ── */
.fp-side-card {
  background: var(--surface, #14121d);
  border: 1px solid var(--border, #2c273d);
  border-radius: 10px;
  padding: 12px 14px;
  box-sizing: border-box;
  width: 100%;
}

.fp-puzzle-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text, #ece8f5);
}

.fp-puzzle-subtitle {
  font-size: 12px;
  color: var(--text3, #56506d);
  font-family: 'IBM Plex Mono', monospace;
}

/* ── Dynamic Feedback Alert Banner ── */
.fp-feedback-alert {
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 12.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.4;
  width: 100%;
  box-sizing: border-box;
}

.fp-feedback-alert.success {
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #4ade80;
}

.fp-feedback-alert.mistake {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.fp-feedback-alert.info {
  background: rgba(201, 168, 76, 0.12);
  border: 1px solid rgba(201, 168, 76, 0.3);
  color: var(--accent);
}

/* ── Retention Progress Box ── */
.fp-retention-card {
  background: rgba(0, 0, 0, 0.25);
}

.fp-tries-chip {
  font-size: 11px;
  font-family: 'IBM Plex Mono', monospace;
  background: rgba(201, 168, 76, 0.15);
  color: var(--accent);
  border: 1px solid rgba(201, 168, 76, 0.3);
  padding: 2px 7px;
  border-radius: 6px;
  font-weight: 700;
}

.fp-tries-chip.retest {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border-color: rgba(59, 130, 246, 0.3);
}

.fp-progress-bar-wrap {
  width: 100%;
  height: 7px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 4px;
}

.fp-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #4ade80);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.fp-rules-note {
  font-size: 11px;
  color: var(--text3, #56506d);
  line-height: 1.4;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ── Solution Moves Box ── */
.fp-moves-box {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border, #2c273d);
  border-radius: 8px;
  padding: 8px 10px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  align-content: flex-start;
  gap: 5px;
  min-height: 48px;
  max-height: 120px;
  overflow-y: auto;
  width: 100%;
  box-sizing: border-box;
}

.fp-move-chip {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 2px 7px;
  border-radius: 5px;
  color: var(--text, #ece8f5);
  font-size: 11.5px;
  cursor: pointer;
  transition: all 0.12s ease;
}

.fp-move-chip:hover {
  border-color: var(--accent);
}

.fp-move-chip.correct {
  background: rgba(34, 197, 94, 0.18);
  border-color: rgba(34, 197, 94, 0.4);
  color: #4ade80;
}

.fp-move-chip.played {
  background: rgba(201, 168, 76, 0.15);
  border-color: rgba(201, 168, 76, 0.3);
  color: var(--accent);
}

.fp-move-chip.active {
  box-shadow: 0 0 6px rgba(201, 168, 76, 0.5);
  border-color: var(--accent);
}

.fp-move-chip.start-chip {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text3, #56506d);
}

/* ── Board Shake Animation on Mistake ── */
.fp-shake {
  animation: fpShake 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes fpShake {
  10%, 90% { transform: translate3d(-1px, 0, 0); }
  20%, 80% { transform: translate3d(2px, 0, 0); }
  30%, 50%, 70% { transform: translate3d(-3px, 0, 0); }
  40%, 60% { transform: translate3d(3px, 0, 0); }
}

/* ── Empty Card (Trophy when 100% Mastered) ── */
.fp-empty-card {
  background: var(--surface, #14121d);
  border: 1px dashed var(--border, #2c273d);
  border-radius: 16px;
  padding: 50px 24px;
  text-align: center;
  max-width: 560px;
  margin: 40px auto;
}

@keyframes fadeInScale {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}