/* ════════════════════════════════════════════════════════════════
   yeon-thinkmap analytics — 학습 분석 대시보드
   8가지 차트가 들어가는 화면. 같은 NODES/EDGES를 받아 다른 각도로 봄.
   ════════════════════════════════════════════════════════════════ */

.yta-root {
  --yta-bg-deep: #0c1a1f;
  --yta-bg-card: rgba(255,255,255,.04);
  --yta-line: rgba(255,255,255,.08);
  --yta-line-soft: rgba(255,255,255,.04);
  --yta-ink-primary: #f0ede2;
  --yta-ink-soft: rgba(240,237,226,.72);
  --yta-ink-mute: rgba(240,237,226,.5);
  --yta-ink-faint: rgba(240,237,226,.28);
  --yta-amber: #c4923e;
  --yta-teal: #3aa0a8;
  --yta-font-serif: "Noto Serif KR", serif;
  --yta-font-sans: "Pretendard", "Apple SD Gothic Neo", sans-serif;

  width: 100%; height: 100%;
  background: radial-gradient(ellipse at center, #122428 0%, var(--yta-bg-deep) 80%);
  color: var(--yta-ink-primary);
  font-family: var(--yta-font-sans);
  overflow-y: auto;
  padding: 76px 28px 40px;
}

.yta-head {
  margin-bottom: 24px;
  text-align: center;
}
.yta-title {
  font-family: var(--yta-font-serif);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 6px;
}
.yta-tagline {
  color: var(--yta-ink-mute);
  font-size: 13px;
  font-family: var(--yta-font-serif);
}

.yta-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
  max-width: 1400px;
  margin: 0 auto;
}

.yta-card {
  background: var(--yta-bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--yta-line);
  border-radius: 12px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.yta-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  gap: 8px;
}
.yta-card-title {
  font-family: var(--yta-font-serif);
  font-weight: 600;
  font-size: 14px;
  color: var(--yta-ink-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.yta-card-sub {
  font-size: 11px;
  color: var(--yta-ink-mute);
}
.yta-badge-example {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(196,146,62,.18);
  color: var(--yta-amber);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .04em;
  border: 0.5px solid rgba(196,146,62,.3);
}

/* 카드 위치 — 12-column grid */
.yta-col-3  { grid-column: span 3; }
.yta-col-4  { grid-column: span 4; }
.yta-col-5  { grid-column: span 5; }
.yta-col-6  { grid-column: span 6; }
.yta-col-7  { grid-column: span 7; }
.yta-col-8  { grid-column: span 8; }
.yta-col-12 { grid-column: span 12; }

@media (max-width: 980px) {
  .yta-col-3, .yta-col-4, .yta-col-5, .yta-col-6, .yta-col-7, .yta-col-8 {
    grid-column: span 12;
  }
}

.yta-canvas-wrap {
  position: relative;
  width: 100%;
}
.yta-canvas-wrap--sm { height: 200px; }
.yta-canvas-wrap--md { height: 240px; }
.yta-canvas-wrap--lg { height: 280px; }

/* ── 단원별 트리맵 (CSS flex) ────────────────────────────── */
.yta-treemap {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  height: 240px;
  align-content: stretch;
}
.yta-treemap-cell {
  position: relative;
  border-radius: 6px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--yta-ink-primary);
  font-size: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: transform .15s ease, opacity .15s ease;
  min-width: 80px;
}
.yta-treemap-cell:hover { transform: scale(1.02); }
.yta-treemap-cell-label {
  font-weight: 500;
  font-size: 13px;
  line-height: 1.3;
}
.yta-treemap-cell-num {
  font-family: var(--yta-font-serif);
  font-size: 16px;
  font-weight: 700;
  text-align: right;
}
.yta-treemap-cell-bar {
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 3px;
  background: currentColor;
  opacity: .85;
}

/* ── 캘린더 히트맵 ────────────────────────────────────────── */
.yta-calendar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 240px;
  justify-content: center;
}
.yta-cal-rows {
  display: grid;
  grid-template-rows: repeat(7, 1fr);
  grid-auto-flow: column;
  grid-auto-columns: 14px;
  gap: 3px;
}
.yta-cal-cell {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: rgba(255,255,255,.05);
  transition: transform .15s ease;
}
.yta-cal-cell:hover { transform: scale(1.3); }
.yta-cal-scale {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  font-size: 10px;
  color: var(--yta-ink-mute);
}
.yta-cal-scale-row {
  display: flex; gap: 3px;
}

/* ── 풀이 요청 히트맵 ─────────────────────────────────────── */
.yta-heatmap {
  display: grid;
  gap: 2px;
  height: 240px;
}
.yta-heatmap-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  align-items: center;
  gap: 8px;
}
.yta-heatmap-label {
  font-size: 11px;
  color: var(--yta-ink-mute);
  text-align: right;
  padding-right: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.yta-heatmap-cells {
  display: grid;
  grid-auto-columns: 1fr;
  grid-auto-flow: column;
  gap: 2px;
  height: 18px;
}
.yta-heatmap-cell {
  background: rgba(58,160,168,.08);
  border-radius: 2px;
  transition: transform .15s ease;
  cursor: pointer;
}
.yta-heatmap-cell:hover { transform: scaleY(1.4); }

/* ── 인사이트 카드 ────────────────────────────────────────── */
.yta-insight {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(58,160,168,.06);
  border-left: 3px solid var(--yta-teal);
  border-radius: 0 8px 8px 0;
  margin-top: 12px;
  font-size: 13px;
  color: var(--yta-ink-soft);
  line-height: 1.6;
}
.yta-insight strong { color: var(--yta-teal); font-weight: 600; }

.yta-empty-card {
  text-align: center;
  color: var(--yta-ink-faint);
  font-size: 12px;
  padding: 40px 16px;
  font-style: italic;
}

/* ── 차트 → 상세 드릴다운 패널 ──────────────────────────── */
.yta-card canvas, .yta-treemap-cell, .yta-cal-cell, .yta-heatmap-cell {
  cursor: pointer;
}

.yta-drill {
  position: fixed; right: 0; top: 0; bottom: 0; z-index: 12;
  width: 440px;
  background: rgba(12,26,31,.55);
  backdrop-filter: blur(32px) saturate(150%);
  -webkit-backdrop-filter: blur(32px) saturate(150%);
  border-left: 1px solid rgba(255,255,255,.1);
  box-shadow: -12px 0 40px rgba(0,0,0,.25);
  transform: translateX(100%);
  transition: transform .32s cubic-bezier(.22,.68,0,1.1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.yta-drill.open { transform: translateX(0); }

.yta-drill-close {
  position: absolute; top: 16px; right: 18px;
  width: 30px; height: 30px;
  border: 1px solid var(--yta-line);
  background: transparent;
  color: var(--yta-ink-soft);
  border-radius: 50%; cursor: pointer;
  font-size: 16px; line-height: 1;
  z-index: 2;
}
.yta-drill-close:hover { background: rgba(255,255,255,.06); }

.yta-drill-head {
  padding: 56px 28px 18px;
  border-bottom: 1px solid var(--yta-line);
  flex-shrink: 0;
}
.yta-drill-context {
  font-size: 11px;
  color: var(--yta-ink-mute);
  letter-spacing: .05em;
  margin-bottom: 6px;
  text-transform: uppercase;
}
.yta-drill-title {
  font-family: var(--yta-font-serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 8px;
}
.yta-drill-count {
  font-size: 12px;
  color: var(--yta-ink-mute);
}
.yta-drill-cat-pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px; font-weight: 600;
  letter-spacing: .04em;
}

.yta-drill-list {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
}
.yta-drill-item {
  padding: 12px 28px;
  border-bottom: 1px solid rgba(255,255,255,.04);
  cursor: pointer;
  transition: background .15s ease;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.yta-drill-item:hover { background: rgba(58,160,168,.06); }
.yta-drill-item.active { background: rgba(58,160,168,.12); }
.yta-drill-item-dot {
  width: 8px; height: 8px; border-radius: 50%;
  margin-top: 6px;
  flex-shrink: 0;
  box-shadow: 0 0 6px currentColor;
}
.yta-drill-item-body { flex: 1; min-width: 0; }
.yta-drill-item-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--yta-ink-primary);
  margin-bottom: 4px;
  line-height: 1.4;
}
.yta-drill-item-meta {
  font-size: 11px;
  color: var(--yta-ink-mute);
  display: flex; gap: 6px; flex-wrap: wrap;
  margin-bottom: 4px;
}
.yta-drill-item-snippet {
  font-size: 12px;
  color: var(--yta-ink-soft);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.yta-drill-item-mastery {
  flex-shrink: 0;
  font-family: ui-monospace, monospace;
  font-size: 11px;
  color: var(--yta-ink-mute);
  margin-left: auto;
}

.yta-drill-detail {
  padding: 18px 28px 24px;
  border-top: 1px solid var(--yta-line);
  background: rgba(0,0,0,.15);
  max-height: 55%;
  overflow-y: auto;
}
.yta-drill-detail-back {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--yta-teal);
  cursor: pointer;
  font-size: 12px;
  padding: 0 0 10px;
  font-family: inherit;
}
.yta-drill-detail-cat {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px; font-weight: 600;
  margin-bottom: 8px;
}
.yta-drill-detail-title {
  font-family: var(--yta-font-serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
}
.yta-drill-detail-meta {
  font-size: 11px;
  color: var(--yta-ink-mute);
  margin-bottom: 12px;
  display: flex; gap: 8px; flex-wrap: wrap;
}
.yta-drill-detail-body {
  font-size: 13px;
  color: var(--yta-ink-soft);
  line-height: 1.7;
  white-space: pre-wrap;
  margin-bottom: 14px;
}
.yta-drill-mastery-wrap {
  margin-bottom: 14px;
}
.yta-drill-mastery-label {
  font-size: 10px;
  color: var(--yta-ink-mute);
  letter-spacing: .05em;
  margin-bottom: 4px;
  font-family: var(--yta-font-serif);
}
.yta-drill-mastery-bar {
  height: 5px;
  background: rgba(255,255,255,.08);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 4px;
}
.yta-drill-mastery-fill {
  height: 100%;
  border-radius: 999px;
  transition: width .4s ease;
}
.yta-drill-detail-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.yta-drill-stat {
  background: rgba(255,255,255,.04);
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--yta-line);
}
.yta-drill-stat-label {
  font-size: 10px;
  color: var(--yta-ink-mute);
}
.yta-drill-stat-val {
  font-family: var(--yta-font-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--yta-ink-primary);
}
.yta-drill-empty {
  padding: 40px 28px;
  text-align: center;
  color: var(--yta-ink-faint);
  font-size: 12px;
  font-style: italic;
}
.yta-drill-example-note {
  margin: 18px 28px;
  padding: 12px 14px;
  background: rgba(196,146,62,.1);
  border-left: 3px solid var(--yta-amber);
  border-radius: 0 6px 6px 0;
  font-size: 12px;
  color: var(--yta-ink-soft);
  line-height: 1.6;
}

@media (max-width: 720px) {
  .yta-drill { width: 100%; }
}