/* ══════════════════ PAWN STRUCTURES ACADEMY STYLES ══════════════════ */

.structures-container {
  padding: 24px 32px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.structures-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 15px;
}

.structures-title-area h2 {
  margin: 0 0 6px 0;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-bright, #fff);
  display: flex;
  align-items: center;
  gap: 10px;
}

.structures-title-area p {
  margin: 0;
  color: var(--text-muted, #94a3b8);
  font-size: 0.95rem;
}

/* ── Stats Hero Row ── */
.structures-stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.structures-stat-card {
  background: rgba(30, 41, 59, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.structures-stat-card:hover {
  transform: translateY(-2px);
  border-color: rgba(245, 158, 11, 0.4);
}

.structures-stat-icon {
  font-size: 2rem;
  line-height: 1;
}

.structures-stat-info .stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: #f59e0b;
  font-family: 'IBM Plex Mono', monospace;
}

.structures-stat-info .stat-label {
  font-size: 0.8rem;
  color: var(--text-muted, #94a3b8);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── Filter Tabs ── */
.structures-filter-tabs {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 24px;
}

.struct-tab-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.struct-tab-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.struct-tab-btn.active {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.3), rgba(217, 119, 6, 0.2));
  border-color: #f59e0b;
  color: #fcd34d;
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.2);
}

/* ── Cards Grid ── */
.structures-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.structure-card {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 20px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.structure-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: #f59e0b;
  opacity: 0.5;
  transition: opacity 0.2s ease, width 0.2s ease;
}

.structure-card:hover {
  transform: translateY(-3px);
  border-color: rgba(245, 158, 11, 0.4);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.structure-card:hover::before {
  opacity: 1;
  width: 6px;
}

.structure-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.structure-card-icon {
  font-size: 1.6rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
}

.structure-card-info h4 {
  margin: 0 0 3px 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: #f1f5f9;
}

.structure-card-info span {
  font-size: 0.8rem;
  color: #94a3b8;
}

.structure-card-desc {
  font-size: 0.85rem;
  color: #cbd5e1;
  line-height: 1.4;
}

.structure-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 5px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.structure-status-tag {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 6px;
  font-weight: 600;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.06);
  color: #94a3b8;
}

.structure-status-tag.mastered {
  background: rgba(34, 197, 94, 0.15);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.structure-card-btn {
  font-size: 0.85rem;
  color: #f59e0b;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ── 2. DEEP-DIVE WORKSPACE ── */
.structures-workspace-wrapper {
  display: flex;
  gap: 30px;
  max-width: 1200px;
  margin: 20px auto;
  padding: 0 20px;
  box-sizing: border-box;
  align-items: flex-start;
  width: 100%;
}

.structures-board-column {
  flex: 0 0 520px;
  max-width: 520px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.struct-view-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(30, 41, 59, 0.7);
  padding: 12px 18px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.struct-view-header h3 {
  margin: 0;
  font-size: 1.15rem;
  color: #fff;
}

.struct-family-badge {
  font-size: 0.75rem;
  padding: 3px 10px;
  background: rgba(245, 158, 11, 0.15);
  color: #fcd34d;
  border-radius: 20px;
  font-weight: 600;
}

.struct-guide-banner {
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: #e2e8f0;
  line-height: 1.4;
}

.struct-guide-banner strong {
  color: #38bdf8;
}

.structures-board-box {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

#structures-board {
  width: 100%;
  height: 100%;
}

.structures-board-controls {
  display: flex;
  gap: 10px;
}

.structures-board-controls .btn {
  flex: 1;
}

.structures-legend-box {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 12px 16px;
}

.legend-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: #94a3b8;
  font-weight: 600;
  margin-bottom: 8px;
}

.legend-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.legend-badge {
  font-size: 0.8rem;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  color: #cbd5e1;
  display: flex;
  align-items: center;
  gap: 5px;
}

.legend-badge.break-green {
  border-left: 3px solid #22c55e;
}

.legend-badge.break-orange {
  border-left: 3px solid #f59e0b;
}

/* ── Right Panel: Strategy Tabs ── */
.structures-panel-column {
  flex: 1;
  min-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.struct-strategy-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 10px;
  flex-wrap: wrap;
}

.strat-tab-btn {
  background: transparent;
  border: none;
  color: #94a3b8;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.strat-tab-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.strat-tab-btn.active {
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.15);
}

.struct-strategy-content {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 20px;
  min-height: 380px;
}

.strategy-section h4 {
  margin: 0 0 12px 0;
  font-size: 1.1rem;
  color: #fff;
}

.strategy-text {
  font-size: 0.92rem;
  color: #cbd5e1;
  line-height: 1.6;
  white-space: pre-line;
}

/* ── Model Games Pane ── */
.model-games-container h4 {
  margin: 0 0 8px 0;
  font-size: 1.05rem;
  color: #fff;
}

.model-game-commentary {
  font-size: 0.88rem;
  color: #94a3b8;
  margin-bottom: 16px;
  line-height: 1.4;
  padding: 10px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
}

.model-game-moves-list {
  max-height: 180px;
  overflow-y: auto;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.85rem;
  color: #cbd5e1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.game-move-chip {
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  cursor: pointer;
}

.game-move-chip.active {
  background: #f59e0b;
  color: #0f172a;
  font-weight: 700;
}

.model-game-controls {
  display: flex;
  gap: 8px;
}

.model-game-controls .btn {
  flex: 1;
}

/* ── Quiz Pane ── */
.struct-quiz-container h4 {
  margin: 0 0 12px 0;
  font-size: 1.1rem;
  color: #fff;
}

.quiz-question-box {
  background: rgba(255, 255, 255, 0.04);
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 0.95rem;
  color: #f1f5f9;
  margin-bottom: 16px;
  line-height: 1.4;
  font-weight: 500;
}

.quiz-options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quiz-option-btn {
  text-align: left;
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.quiz-option-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(245, 158, 11, 0.4);
  color: #fff;
}

.quiz-result-feedback {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 0.9rem;
  line-height: 1.4;
}

.quiz-result-feedback.correct {
  background: rgba(20, 83, 45, 0.4);
  border: 1px solid rgba(34, 197, 94, 0.5);
  color: #4ade80;
}

.quiz-result-feedback.incorrect {
  background: rgba(127, 29, 29, 0.4);
  border: 1px solid rgba(239, 68, 68, 0.5);
  color: #f87171;
}

/* ── Mobile Responsiveness ── */
@media (max-width: 900px) {
  .structures-workspace-wrapper {
    flex-direction: column;
    align-items: center;
  }
  
  .structures-board-column {
    max-width: 100%;
    flex: none;
  }
  
  .structures-panel-column {
    width: 100%;
  }
}

@media (max-width: 600px) {
  .structures-container {
    padding: 16px;
  }
  
  .structures-header {
    flex-direction: column;
    align-items: flex-start;
  }
}