/* edu-d11.css — deck_11 다크 패널 스코프 */
.d11 {
  --bg-0: #0A0D14;
  --bg-1: #11151F;
  --bg-2: #1A2030;
  --bg-3: #232B3D;
  --line: rgba(255,255,255,0.07);
  --line-strong: rgba(255,255,255,0.14);
  --text-1: #ECEEF3;
  --text-2: #A7B0C0;
  --text-3: #6B7385;
  --text-4: #4A5163;
  --purple: #A78BFA;
  --purple-soft: rgba(167,139,250,0.14);
  --teal: #5EEAD4;
  --teal-soft: rgba(94,234,212,0.12);
  --amber: #FBBF24;
  --amber-soft: rgba(251,191,36,0.13);
  --blue: #7DD3FC;
  --blue-soft: rgba(125,211,252,0.13);
  --rose: #FB7185;
  --rose-soft: rgba(251,113,133,0.13);
  --lime: #BEF264;
  --lime-soft: rgba(190,242,100,0.13);
  --serif: 'Instrument Serif', 'Pretendard', serif;
  --sans: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
}
.d11 * { box-sizing: border-box; margin: 0; padding: 0; }
.d11 { scroll-behavior: smooth; }
.d11 {
  font-family: var(--sans);
  background: var(--bg-0);
  color: var(--text-1);
  line-height: 1.6;
  font-size: 15px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.d11::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(167,139,250,0.05), transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(94,234,212,0.04), transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.d11 .nav-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10,13,20,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 0.5px solid var(--line);
}
.d11 .nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  gap: 36px;
}
.d11 .brand {
  font-family: var(--serif);
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--text-1);
  white-space: nowrap;
}
.d11 .brand em {
  font-style: italic;
  color: var(--purple);
}
.d11 .nav-tabs {
  display: flex;
  gap: 4px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}
.d11 .nav-tabs::-webkit-scrollbar { display: none; }
.d11 .nav-tab {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  padding: 7px 12px;
  border-radius: 6px;
  color: var(--text-3);
  cursor: pointer;
  border: none;
  background: transparent;
  white-space: nowrap;
  transition: all 0.2s;
}
.d11 .nav-tab:hover {
  color: var(--text-1);
  background: var(--bg-2);
}
.d11 .nav-tab.active {
  color: var(--text-1);
  background: var(--bg-3);
}
.d11 .nav-tab .num {
  color: var(--text-4);
  margin-right: 6px;
  font-weight: 500;
}
.d11 .nav-tab.active .num { color: var(--purple); }
.d11 .kbd-hint {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-4);
  white-space: nowrap;
}
.d11 .kbd-hint kbd {
  display: inline-block;
  padding: 2px 6px;
  background: var(--bg-2);
  border: 0.5px solid var(--line-strong);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 10px;
  margin: 0 2px;
  color: var(--text-2);
}
.d11 main {
  padding-top: 64px;
  position: relative;
  z-index: 1;
}
.d11 .section {
  display: none;
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 32px 120px;
  animation: fadeUp 0.5s ease-out;
}
.d11 .section.active { display: block; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.d11 .section-meta {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--purple);
  margin-bottom: 16px;
}
.d11 .section-title {
  font-family: var(--serif);
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
  color: var(--text-1);
}
.d11 .section-title em {
  font-style: italic;
  color: var(--text-2);
}
.d11 .section-lede {
  font-size: 18px;
  line-height: 1.65;
  color: var(--text-2);
  max-width: 780px;
  margin-bottom: 48px;
  font-weight: 300;
}
.d11 .section-lede strong {
  color: var(--text-1);
  font-weight: 500;
}
.d11 h3 {
  font-family: var(--serif);
  font-size: 26px;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin: 48px 0 14px;
  color: var(--text-1);
}
.d11 h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 12px;
  font-weight: 500;
}
.d11 p {
  margin-bottom: 14px;
  color: var(--text-2);
  max-width: 780px;
}
.d11 p strong { color: var(--text-1); font-weight: 500; }
.d11 p code, .d11 li code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--bg-2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--purple);
}
.d11 .card {
  background: var(--bg-1);
  border: 0.5px solid var(--line);
  border-radius: 14px;
  padding: 28px;
  margin: 24px 0;
}
.d11 .card-grid {
  display: grid;
  gap: 16px;
}
.d11 .cols-2 { grid-template-columns: 1fr 1fr; }
.d11 .cols-3 { grid-template-columns: 1fr 1fr 1fr; }
@media (max-width: 860px) {
.d11 .cols-2, .d11 .cols-3 { grid-template-columns: 1fr; }


}

.d11 .code {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.75;
  background: var(--bg-0);
  border: 0.5px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
  overflow-x: auto;
  color: var(--text-2);
  white-space: pre;
}
.d11 .code .k { color: var(--blue); }
.d11 .code .v { color: var(--purple); }
.d11 .code .s { color: var(--teal); }
.d11 .code .c { color: var(--text-4); font-style: italic; }
.d11 .code .n { color: var(--amber); }
.d11 .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
}
.d11 .tag-purple { background: var(--purple-soft); color: var(--purple); }
.d11 .tag-teal { background: var(--teal-soft); color: var(--teal); }
.d11 .tag-amber { background: var(--amber-soft); color: var(--amber); }
.d11 .tag-blue { background: var(--blue-soft); color: var(--blue); }
.d11 .tag-rose { background: var(--rose-soft); color: var(--rose); }
.d11 .tag-lime { background: var(--lime-soft); color: var(--lime); }
.d11 svg .node-circle { stroke: var(--line-strong); stroke-width: 0.5; }
.d11 svg .node-rect { stroke: var(--line-strong); stroke-width: 0.5; }
.d11 svg .label { font-family: var(--sans); font-size: 13px; fill: var(--text-1); font-weight: 500; }
.d11 svg .sub-label { font-family: var(--mono); font-size: 10.5px; fill: var(--text-3); }
.d11 svg .edge { stroke: var(--text-3); stroke-width: 1.2; fill: none; }
.d11 svg .edge-strong { stroke: var(--purple); stroke-width: 1.8; fill: none; }
.d11 svg .edge-teal { stroke: var(--teal); stroke-width: 1.5; fill: none; }
.d11 svg .edge-dashed { stroke-dasharray: 3 3; }
.d11 svg .frame { fill: none; stroke: var(--line); stroke-width: 0.5; stroke-dasharray: 4 4; }
.d11 svg .frame-label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; fill: var(--text-3); }
.d11 .hero {
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 56px 32px;
  max-width: 1180px;
  margin: 0 auto;
}
.d11 .hero-meta {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.d11 .hero-meta .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--purple);
}
.d11 .hero-title {
  font-family: var(--serif);
  font-size: clamp(56px, 9vw, 120px);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--text-1);
  margin-bottom: 28px;
}
.d11 .hero-title em {
  font-style: italic;
  color: var(--purple);
  font-weight: 400;
}
.d11 .hero-sub {
  font-size: 20px;
  line-height: 1.55;
  color: var(--text-2);
  max-width: 720px;
  margin-bottom: 56px;
  font-weight: 300;
}
.d11 .hero-pills {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.d11 .pill {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 8px 14px;
  border: 0.5px solid var(--line-strong);
  border-radius: 100px;
  color: var(--text-2);
  background: var(--bg-1);
}
.d11 .hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 0.5px solid var(--line);
  max-width: 800px;
}
.d11 .stat-num {
  font-family: var(--serif);
  font-size: 44px;
  line-height: 1;
  color: var(--text-1);
  margin-bottom: 6px;
}
.d11 .stat-num em { font-style: italic; color: var(--teal); }
.d11 .stat-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
}
.d11 .qa-block {
  background: var(--bg-1);
  border: 0.5px solid var(--line);
  border-radius: 14px;
  padding: 24px 28px;
  margin: 20px 0;
}
.d11 .qa-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 8px;
}
.d11 .qa-question {
  font-size: 17px;
  font-weight: 400;
  color: var(--text-1);
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 0.5px solid var(--line);
  line-height: 1.5;
  font-family: var(--serif);
  font-size: 22px;
}
.d11 .qa-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
@media (max-width: 860px) {
.d11 .qa-split { grid-template-columns: 1fr; }


}
.d11 .qa-side h5 {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.d11 .qa-side.vec h5 { color: var(--blue); }
.d11 .qa-side.gph h5 { color: var(--purple); }
.d11 .qa-side p { font-size: 13.5px; line-height: 1.7; }
.d11 .qa-result {
  font-size: 12.5px;
  padding: 10px 12px;
  border-radius: 6px;
  margin-top: 10px;
  line-height: 1.6;
}
.d11 .qa-result-fail {
  background: var(--bg-0);
  color: var(--text-1);
  border: 0.5px solid var(--line);
}
.d11 .qa-result-fail strong:first-child {
  color: var(--rose);
}
.d11 .qa-result-win {
  background: var(--bg-0);
  color: var(--text-1);
  border: 0.5px solid var(--line);
}
.d11 .qa-result-win strong:first-child {
  color: var(--lime);
}
.d11 .qa-result strong { color: var(--text-1); }
.d11 .path-code {
  font-family: var(--mono);
  font-size: 11.5px;
  background: var(--bg-0);
  padding: 8px 10px;
  border-radius: 6px;
  display: block;
  margin: 8px 0;
  color: var(--teal);
  word-break: keep-all;
  line-height: 1.55;
  border: 0.5px solid var(--line);
}
.d11 .bullets {
  list-style: none;
  padding: 0;
  margin: 16px 0;
}
.d11 .bullets li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 780px;
}
.d11 .bullets li::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--purple);
  border-radius: 1px;
  transform: rotate(45deg);
}
.d11 .bullets li strong { color: var(--text-1); }
.d11 .section-footer {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 0.5px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-4);
}
.d11 .nav-btn {
  background: none;
  border: 0.5px solid var(--line-strong);
  color: var(--text-2);
  padding: 8px 16px;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.2s;
}
.d11 .nav-btn:hover {
  border-color: var(--purple);
  color: var(--text-1);
  background: var(--purple-soft);
}
.d11 .nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}
.d11 .compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}
.d11 .compare-table th, .d11 .compare-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 0.5px solid var(--line);
  vertical-align: top;
}
.d11 .compare-table th {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 500;
  background: var(--bg-1);
}
.d11 .compare-table th:first-child { border-radius: 8px 0 0 0; }
.d11 .compare-table th:last-child { border-radius: 0 8px 0 0; }
.d11 .compare-table td { color: var(--text-2); }
.d11 .compare-table td:first-child { color: var(--text-1); font-weight: 500; }
.d11 .timeline {
  position: relative;
  margin: 32px 0;
}
.d11 .timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 8px;
  bottom: 8px;
  width: 0.5px;
  background: var(--line-strong);
}
.d11 .tl-item {
  position: relative;
  padding-left: 48px;
  margin-bottom: 28px;
}
.d11 .tl-item::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--bg-0);
  border: 1.5px solid var(--purple);
}
.d11 .tl-item h5 {
  font-family: var(--serif);
  font-size: 19px;
  color: var(--text-1);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.d11 .tl-item .tl-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 8px;
}
.d11 .tl-item p { font-size: 13.5px; margin-bottom: 0; }


/* ===== merge overrides: deck_11 as dark panel inside edu ===== */
.slide-bare { background: transparent !important; border: none !important; padding: 0 !important; }
.d11 {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  padding: 44px 40px 40px;
  isolation: isolate;
  background: var(--bg-0) !important;
  color: var(--text-1) !important;
  border: 1px solid rgba(20, 30, 60, 0.09);
}
/* 고정 그radient 오버레이는 edu 셸 안에서 비활성 (뷰포트 전체를 덮지 않도록) */
.d11::before { display: none !important; }
.d11 .section {
  display: block !important;
  min-height: 0 !important;
  max-width: none !important;
  margin: 0 !important;
  padding: 0 !important;
  animation: none !important;
  opacity: 1 !important;
}
.d11 .section-footer { display: none !important; }
@media (max-width: 760px) { .d11 { padding: 28px 18px; } }

/* deck_11 콜아웃 — callouts.css 라이트 테마 덮어쓰기 */
.d11 .callout {
  background: var(--bg-1);
  border: 0.5px solid var(--line);
  padding: 18px 22px;
  border-radius: 10px;
  margin: 24px 0;
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.7;
  position: relative;
}