:root {
  --slide-width: 1920;
  --slide-height: 1080;
  --bg: #f7fafc;
  --paper: #ffffff;
  --ink: #172033;
  --muted: #5c6b7d;
  --line: #d7e0ea;
  --blue: #2563eb;
  --green: #159957;
  --orange: #f28c28;
  --violet: #2563eb;
  --shadow: 0 24px 70px rgba(26, 41, 61, 0.14);
}

* { box-sizing: border-box; }

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
}

body {
  position: relative;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: "Apple SD Gothic Neo", "Noto Sans KR", system-ui, sans-serif;
}

button { font: inherit; }

.deck {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1920px;
  height: 1080px;
  container-type: size;
  overflow: hidden;
  transform: translate(-50%, -50%) scale(var(--deck-scale, 1));
  transform-origin: center;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.slide {
  position: absolute;
  inset: 0;
  display: none;
  padding: clamp(30px, 3.2cqw, 52px);
}

.slide.active {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.2cqw, 20px);
}

.slide::before {
  position: absolute;
  inset: 0 0 auto;
  height: 12px;
  background: linear-gradient(90deg, var(--blue), var(--green), var(--orange));
  content: "";
}

.slide-header {
  position: relative;
  z-index: 1;
}

h1,
h2,
p,
figure { margin: 0; }

.unit {
  margin-bottom: 6px;
  color: var(--blue);
  font-size: clamp(22px, 2cqw, 34px);
  font-weight: 900;
}

.page-ref {
  position: absolute;
  top: 4px;
  right: 0;
  border: 2px solid var(--line);
  border-radius: 999px;
  padding: 8px 16px;
  background: #f6f8fb;
  color: var(--muted);
  font-size: clamp(18px, 1.35cqw, 23px);
  font-weight: 900;
}

h1 {
  font-size: clamp(48px, 4.8cqw, 74px);
  line-height: 1;
}

.subtitle {
  margin-top: 10px;
  color: var(--muted);
  font-size: clamp(21px, 1.9cqw, 30px);
  font-weight: 800;
  line-height: 1.3;
}

.subtitle strong { color: var(--blue); }

.subtitle .data-keyword {
  display: inline-block;
  border-radius: 999px;
  padding: 1px 13px 3px;
  background: var(--blue);
  color: #fff;
  font-size: 1.12em;
  line-height: 1.15;
}

.concept-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.46fr);
  gap: 18px;
  min-height: 0;
}

.why-card,
.textbook-figure,
.comparison {
  border: 2px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.why-card {
  display: grid;
  align-content: center;
  gap: 12px;
  border-left: 10px solid var(--violet);
  padding: clamp(18px, 1.7cqw, 28px);
  background: linear-gradient(110deg, #faf7ff, #fff);
}

.section-label {
  color: var(--violet);
  font-size: clamp(26px, 2.25cqw, 36px);
  font-weight: 900;
}

.why-copy {
  font-size: clamp(21px, 1.8cqw, 29px);
  font-weight: 800;
  line-height: 1.35;
}

.why-copy strong { color: var(--blue); }

.textbook-figure {
  display: grid;
  min-height: 0;
  place-items: center;
  padding: 8px 18px;
}

.textbook-figure img {
  display: block;
  width: auto;
  max-width: 100%;
  height: clamp(145px, 14cqw, 225px);
  object-fit: contain;
}

.comparison {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.comparison h2 {
  padding: 12px 20px;
  background: var(--blue);
  color: #fff;
  font-size: clamp(25px, 2cqw, 34px);
  line-height: 1.1;
}

table {
  width: 100%;
  height: calc(100% - clamp(52px, 4cqw, 66px));
  border-collapse: collapse;
  table-layout: fixed;
}

th,
td {
  border-top: 2px solid var(--line);
  border-right: 2px solid var(--line);
  padding: clamp(8px, 0.8cqw, 13px) clamp(12px, 1.1cqw, 18px);
  font-size: clamp(18px, 1.45cqw, 25px);
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
  vertical-align: middle;
}

th:last-child,
td:last-child { border-right: 0; }

thead th {
  background: #eef5ff;
  color: var(--blue);
  font-size: clamp(20px, 1.65cqw, 28px);
  font-weight: 900;
}

thead th:first-child,
tbody th {
  width: 16%;
  background: #f6f8fb;
  color: var(--muted);
  font-weight: 900;
}

tbody td:nth-child(3) { background: #fbfdff; }
tbody td strong { color: var(--blue); }

.flow {
  display: inline-block;
  border-radius: 999px;
  padding: 6px 14px;
  background: #eef5ff;
  color: var(--blue);
  font-weight: 900;
}

.problem-grid,
.case-grid {
  flex: 1;
  min-height: 0;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.problem-card {
  grid-column: span 2;
  display: flex;
  min-height: 0;
  flex-direction: column;
  gap: 14px;
  border: 2px solid var(--line);
  border-top: 10px solid var(--blue);
  border-radius: 8px;
  padding: clamp(18px, 1.6cqw, 26px);
  background: #fff;
  box-shadow: 0 10px 28px rgba(23, 32, 51, 0.06);
}

.problem-card:nth-child(4) { grid-column: 2 / span 2; }
.problem-card:nth-child(5) { grid-column: 4 / span 2; }
.problem-card.cluster { border-top-color: var(--green); }
.problem-card.recognize { border-top-color: var(--orange); }
.problem-card.language { border-top-color: var(--violet); }
.problem-card.generate { border-top-color: #e84a5f; }

.problem-heading {
  display: flex;
  align-items: center;
  gap: 14px;
}

.problem-heading span {
  display: grid;
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  place-items: center;
  border-radius: 50%;
  background: #eef5ff;
  color: var(--blue);
  font-size: 19px;
  font-weight: 900;
}

.problem-card h2 {
  color: var(--ink);
  font-size: clamp(27px, 2.2cqw, 37px);
  line-height: 1.1;
}

.problem-card > p {
  font-size: clamp(20px, 1.65cqw, 27px);
  font-weight: 800;
  line-height: 1.35;
}

.problem-card > p strong { color: var(--blue); }

.example {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: auto;
  border-radius: 8px;
  padding: 10px 14px;
  background: #f6f8fb;
  color: var(--muted);
  font-size: clamp(17px, 1.35cqw, 22px);
  font-weight: 800;
}

.example b {
  flex: 0 0 auto;
  color: var(--blue);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.case-card {
  position: relative;
  display: flex;
  min-height: 0;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: clamp(20px, 1.7cqw, 28px);
  background: #fff;
  box-shadow: 0 10px 28px rgba(23, 32, 51, 0.06);
}

.case-card::before {
  position: absolute;
  top: 0;
  right: 0;
  width: 90px;
  height: 90px;
  border-radius: 0 0 0 100%;
  background: #eef5ff;
  content: "";
}

.case-number {
  color: var(--blue);
  font-size: 19px;
  font-weight: 900;
}

.case-card h2 {
  position: relative;
  z-index: 1;
  color: var(--blue);
  font-size: clamp(26px, 2cqw, 34px);
  line-height: 1.08;
}

.case-card > p:not(.case-number) {
  font-size: clamp(19px, 1.5cqw, 25px);
  font-weight: 800;
  line-height: 1.35;
}

.case-card > span {
  width: max-content;
  max-width: 100%;
  margin-top: auto;
  border-radius: 999px;
  padding: 8px 14px;
  background: #f6f8fb;
  color: var(--muted);
  font-size: clamp(17px, 1.25cqw, 21px);
  font-weight: 900;
}

.data-map {
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  gap: 18px;
}

.data-root {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  border: 3px solid var(--blue);
  border-radius: 8px;
  padding: 16px 24px;
  background: #eef5ff;
}

.data-root::after {
  position: absolute;
  bottom: -21px;
  left: 50%;
  width: 3px;
  height: 18px;
  background: var(--line);
  content: "";
}

.root-label {
  border-radius: 999px;
  padding: 10px 22px;
  background: var(--blue);
  color: #fff;
  font-size: clamp(27px, 2.2cqw, 37px);
  font-weight: 900;
}

.data-root p {
  font-size: clamp(23px, 1.9cqw, 31px);
  font-weight: 900;
}

.data-root p strong { color: var(--blue); }

.data-root > span {
  color: var(--muted);
  font-size: clamp(18px, 1.4cqw, 23px);
  font-weight: 900;
}

.data-branches {
  position: relative;
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
}

.data-branches::before {
  position: absolute;
  top: 0;
  right: 20%;
  left: 30%;
  height: 3px;
  background: var(--line);
  content: "";
}

.data-branch {
  position: relative;
  display: flex;
  min-height: 0;
  flex-direction: column;
  gap: 16px;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: #fff;
}

.data-branch::before {
  position: absolute;
  top: 0;
  left: 50%;
  width: 3px;
  height: 20px;
  transform: translateY(-100%);
  background: var(--line);
  content: "";
}

.branch-header {
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 2px solid var(--line);
  padding-bottom: 14px;
}

.branch-number {
  display: grid;
  width: 50px;
  height: 50px;
  flex: 0 0 50px;
  place-items: center;
  border-radius: 50%;
  background: var(--violet);
  color: #fff;
  font-size: 20px;
  font-weight: 900;
}

.format-branch .branch-number { background: var(--green); }

.branch-header h2 {
  color: var(--violet);
  font-size: clamp(29px, 2.3cqw, 39px);
  line-height: 1.05;
}

.format-branch .branch-header h2 { color: var(--green); }

.branch-header div p {
  margin-top: 4px;
  color: var(--muted);
  font-size: clamp(17px, 1.25cqw, 21px);
  font-weight: 800;
}

.attribute-types,
.format-types {
  display: grid;
  flex: 1;
  min-height: 0;
  gap: 14px;
}

.attribute-types { grid-template-columns: 1.2fr 0.8fr; }
.format-types { grid-template-rows: repeat(2, minmax(0, 1fr)); }

.attribute-types section,
.format-types section {
  display: flex;
  min-height: 0;
  flex-direction: column;
  gap: 8px;
  border-radius: 8px;
  padding: 18px;
  background: #f6f8fb;
}

.attribute-types h3,
.format-types h3 {
  color: var(--blue);
  font-size: clamp(24px, 1.9cqw, 32px);
  line-height: 1.1;
}

.attribute-types section > p,
.format-types section > p {
  font-size: clamp(17px, 1.3cqw, 22px);
  font-weight: 800;
  line-height: 1.3;
}

.category-type > span {
  margin-top: auto;
  border-radius: 8px;
  padding: 10px;
  background: #fff;
  color: var(--muted);
  font-size: clamp(16px, 1.15cqw, 20px);
  font-weight: 900;
}

.numeric-children {
  position: relative;
  display: grid;
  flex: 1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding-top: 12px;
}

.numeric-children::before {
  position: absolute;
  top: 2px;
  right: 25%;
  left: 25%;
  height: 2px;
  background: #bfdbfe;
  content: "";
}

.numeric-children > div {
  display: flex;
  min-height: 0;
  flex-direction: column;
  gap: 5px;
  border: 2px solid #bfdbfe;
  border-radius: 8px;
  padding: 12px;
  background: #fff;
}

.numeric-children b {
  color: var(--blue);
  font-size: clamp(20px, 1.5cqw, 25px);
}

.numeric-children span {
  font-size: clamp(15px, 1.05cqw, 18px);
  font-weight: 800;
}

.numeric-children em {
  margin-top: auto;
  color: var(--muted);
  font-size: clamp(14px, 0.95cqw, 17px);
  font-style: normal;
  font-weight: 900;
}

.mini-table {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: auto;
  overflow: hidden;
  border: 2px solid #bbf7d0;
  border-radius: 8px;
}

.mini-table span {
  padding: 5px 8px;
  background: #fff;
  font-size: clamp(14px, 1cqw, 17px);
  font-weight: 900;
  text-align: center;
}

.mini-table span:nth-child(-n + 3) {
  background: #dcfce7;
  color: #08783e;
}

.format-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.format-chips span {
  border: 2px solid #bbf7d0;
  border-radius: 999px;
  padding: 6px 11px;
  background: #fff;
  color: #08783e;
  font-size: clamp(14px, 1cqw, 17px);
  font-weight: 900;
}

.collection-layout {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 18px;
}

.collection-methods,
.selection-process,
.collection-checks {
  min-height: 0;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.collection-methods {
  display: grid;
  grid-template-rows: auto repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 22px;
}

.collection-methods > h2,
.selection-process > h2,
.collection-checks > h2 {
  font-size: clamp(27px, 2.1cqw, 36px);
  line-height: 1.1;
}

.collection-methods > h2 { color: var(--violet); }

.method-card {
  display: grid;
  min-height: 0;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 14px;
  border-radius: 8px;
  padding: 14px 16px;
  background: #f8f6ff;
}

.method-number {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 50%;
  background: var(--violet);
  color: #fff;
  font-size: 25px;
  font-weight: 900;
}

.method-card div {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 5px;
}

.method-card h3 {
  color: var(--violet);
  font-size: clamp(22px, 1.65cqw, 28px);
  line-height: 1.1;
}

.method-card p {
  font-size: clamp(16px, 1.16cqw, 20px);
  font-weight: 800;
  line-height: 1.25;
}

.method-card b {
  color: var(--muted);
  font-size: clamp(14px, 1cqw, 17px);
  line-height: 1.2;
}

.selection-column {
  display: grid;
  min-height: 0;
  grid-template-rows: 1.04fr 0.96fr;
  gap: 18px;
}

.selection-process,
.collection-checks {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px;
}

.selection-process > h2 { color: var(--blue); }

.selection-flow {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: stretch;
  gap: 9px;
}

.selection-flow section {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 7px;
  border: 2px solid #bfdbfe;
  border-radius: 8px;
  padding: 13px;
  background: #f8fbff;
}

.selection-flow section > span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-size: 17px;
  font-weight: 900;
}

.selection-flow h3 {
  color: var(--blue);
  font-size: clamp(19px, 1.35cqw, 23px);
  line-height: 1.12;
}

.selection-flow p {
  font-size: clamp(15px, 1.03cqw, 18px);
  font-weight: 800;
  line-height: 1.25;
}

.selection-flow b {
  margin-top: auto;
  color: var(--muted);
  font-size: clamp(13px, 0.9cqw, 16px);
  line-height: 1.2;
}

.selection-flow i {
  align-self: center;
  color: var(--blue);
  font-size: clamp(23px, 1.8cqw, 31px);
  font-style: normal;
  font-weight: 900;
}

.collection-checks > h2 { color: #d14457; }

.check-grid {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.check-grid section {
  display: flex;
  min-height: 0;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  border-left: 8px solid #e84a5f;
  border-radius: 8px;
  padding: 10px 14px;
  background: #fff5f6;
}

.check-grid b {
  color: #c83449;
  font-size: clamp(18px, 1.3cqw, 22px);
}

.check-grid p {
  font-size: clamp(14px, 1cqw, 17px);
  font-weight: 800;
  line-height: 1.25;
}

.process-overview {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-rows: minmax(230px, 0.72fr) minmax(0, 1fr);
  gap: 20px;
}

.process-figure {
  display: grid;
  min-height: 0;
  place-items: center;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 20px 30px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(23, 32, 51, 0.06);
}

.process-figure img {
  display: block;
  width: min(100%, 1500px);
  height: auto;
  max-height: 100%;
  object-fit: contain;
}

.practice-bridge {
  display: flex;
  min-height: 0;
  flex-direction: column;
  gap: 13px;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 20px 24px;
  background: linear-gradient(110deg, #faf7ff, #f8fbff);
}

.bridge-label {
  color: var(--violet);
  font-size: clamp(24px, 1.9cqw, 32px);
  font-weight: 900;
}

.bridge-steps {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.bridge-steps section {
  display: grid;
  grid-template-columns: auto 1fr;
  align-content: center;
  align-items: center;
  gap: 4px 12px;
  border: 2px solid #ddd6fe;
  border-radius: 8px;
  padding: 14px 18px;
  background: #fff;
}

.bridge-steps span {
  display: grid;
  width: 42px;
  height: 42px;
  grid-row: span 2;
  place-items: center;
  border-radius: 50%;
  background: var(--violet);
  color: #fff;
  font-size: 20px;
  font-weight: 900;
}

.bridge-steps h2 {
  color: var(--violet);
  font-size: clamp(22px, 1.6cqw, 28px);
}

.bridge-steps p {
  font-size: clamp(16px, 1.15cqw, 20px);
  font-weight: 800;
}

.bridge-question {
  color: var(--muted);
  font-size: clamp(18px, 1.35cqw, 23px);
  font-weight: 900;
  text-align: center;
}

.bridge-question strong { color: var(--blue); }

.inspection-grid {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: 0.9fr 0.9fr 1.2fr;
  gap: 18px;
}

.inspection-card {
  display: flex;
  min-height: 0;
  flex-direction: column;
  gap: 16px;
  border: 2px solid var(--line);
  border-top: 10px solid var(--violet);
  border-radius: 8px;
  padding: 22px;
  background: #fff;
}

.inspection-card:nth-child(2) { border-top-color: var(--green); }
.inspection-card:nth-child(3) { border-top-color: var(--blue); }

.inspection-card header {
  display: flex;
  align-items: center;
  gap: 13px;
}

.inspection-card header > span {
  display: grid;
  width: 45px;
  height: 45px;
  flex: 0 0 45px;
  place-items: center;
  border-radius: 50%;
  background: var(--violet);
  color: #fff;
  font-size: 20px;
  font-weight: 900;
}

.inspection-card:nth-child(2) header > span { background: var(--green); }
.inspection-card:nth-child(3) header > span { background: var(--blue); }

.inspection-card h2 {
  font-size: clamp(27px, 2.05cqw, 35px);
  line-height: 1.05;
}

.inspection-card header p {
  margin-top: 3px;
  color: var(--muted);
  font-size: clamp(16px, 1.1cqw, 19px);
  font-weight: 900;
}

.code-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.code-chips code,
.practice-result code {
  border-radius: 6px;
  padding: 7px 11px;
  background: #172033;
  color: #fff;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(15px, 1.05cqw, 18px);
  font-weight: 800;
}

.inspection-card ul {
  display: grid;
  gap: 13px;
  margin: 0;
  padding-left: 25px;
}

.inspection-card li {
  font-size: clamp(18px, 1.4cqw, 24px);
  font-weight: 800;
  line-height: 1.3;
}

.inspection-card li b { color: var(--blue); }

.stat-compare {
  display: grid;
  gap: 8px;
  margin-top: auto;
}

.stat-compare span {
  border-radius: 8px;
  padding: 10px 13px;
  background: #f2fbf6;
  color: var(--muted);
  font-size: clamp(16px, 1.15cqw, 20px);
  font-weight: 900;
}

.stat-compare b { color: var(--green); }

.chart-types {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
}

.chart-types span {
  display: grid;
  gap: 3px;
  border-radius: 8px;
  padding: 9px;
  background: #eef5ff;
  color: var(--muted);
  font-size: clamp(13px, 0.88cqw, 16px);
  font-weight: 800;
  text-align: center;
}

.chart-types b {
  color: var(--blue);
  font-size: clamp(15px, 1cqw, 18px);
}

.penguin-counts {
  display: flex;
  min-height: 0;
  flex: 1;
  align-items: end;
  justify-content: center;
  gap: 18px;
  border-bottom: 3px solid var(--line);
  padding: 10px 18px 0;
}

.penguin-counts > div {
  display: grid;
  width: 26%;
  height: 100%;
  grid-template-rows: 1fr auto auto;
  align-items: end;
  gap: 3px;
  text-align: center;
}

.penguin-counts div > span {
  width: 100%;
  height: var(--bar);
  min-height: 24px;
  border-radius: 7px 7px 0 0;
  background: var(--blue);
}

.penguin-counts div:nth-child(2) > span { background: var(--orange); }
.penguin-counts div:nth-child(3) > span { background: var(--green); }

.penguin-counts b,
.penguin-counts em {
  font-size: clamp(13px, 0.92cqw, 16px);
  font-style: normal;
}

.bias-note {
  border-radius: 8px;
  padding: 9px 12px;
  background: #fff5f6;
  color: var(--muted);
  font-size: clamp(15px, 1.05cqw, 18px);
  font-weight: 900;
  text-align: center;
}

.bias-note strong { color: #d14457; }

.preprocess-grid {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.preprocess-card {
  display: flex;
  min-height: 0;
  flex-direction: column;
  gap: 18px;
  border: 2px solid var(--line);
  border-top: 10px solid var(--violet);
  border-radius: 8px;
  padding: 24px;
  background: #fff;
}

.outlier-card { border-top-color: var(--orange); }
.normalize-card { border-top-color: var(--green); }

.preprocess-card header {
  display: flex;
  align-items: center;
  gap: 13px;
}

.preprocess-card header span {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 50%;
  background: var(--violet);
  color: #fff;
  font-size: 21px;
  font-weight: 900;
}

.outlier-card header span { background: var(--orange); }
.normalize-card header span { background: var(--green); }

.preprocess-card h2 {
  font-size: clamp(28px, 2.2cqw, 38px);
}

.preprocess-card > p {
  font-size: clamp(20px, 1.55cqw, 26px);
  font-weight: 800;
  line-height: 1.4;
}

.preprocess-card > p code {
  border-radius: 5px;
  padding: 2px 6px;
  background: #f6f8fb;
  color: var(--blue);
  font-weight: 900;
}

.practice-result {
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  align-items: start;
  justify-content: center;
  gap: 13px;
  border-radius: 8px;
  padding: 20px;
  background: #f8f6ff;
}

.outlier-card .practice-result { background: #fff8f0; }

.practice-result > b {
  color: var(--violet);
  font-size: clamp(20px, 1.5cqw, 26px);
}

.outlier-card .practice-result > b { color: var(--orange); }

.practice-result > span {
  font-size: clamp(18px, 1.35cqw, 23px);
  font-weight: 800;
  line-height: 1.35;
}

.practice-result strong { color: var(--blue); }

.preprocess-card footer {
  border-radius: 8px;
  padding: 10px 13px;
  background: #f6f8fb;
  color: var(--muted);
  font-size: clamp(16px, 1.12cqw, 19px);
  font-weight: 900;
  text-align: center;
}

.normalization-demo {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  border-radius: 8px;
  padding: 18px;
  background: #f2fbf6;
}

.normalization-demo > div {
  display: grid;
  gap: 10px;
}

.normalization-demo b {
  color: var(--green);
  font-size: clamp(19px, 1.35cqw, 23px);
}

.normalization-demo span {
  border-radius: 6px;
  padding: 8px 10px;
  background: #fff;
  font-size: clamp(14px, 0.95cqw, 17px);
  font-weight: 900;
}

.normalization-demo i {
  color: var(--green);
  font-size: 28px;
  font-style: normal;
  font-weight: 900;
}

.normalization-demo .zero-one {
  display: grid;
  min-height: 82px;
  place-items: center;
  border: 3px solid #86efac;
  color: #08783e;
  font-size: clamp(18px, 1.3cqw, 22px);
  text-align: center;
}

.feature-layout {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 18px;
}

.feature-review,
.species-features,
.correlation-evidence {
  min-height: 0;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: #fff;
}

.feature-review {
  display: flex;
  flex-direction: column;
  gap: 18px;
  border-top: 10px solid var(--violet);
}

.feature-review h2,
.species-features h2,
.correlation-evidence h2 {
  color: var(--violet);
  font-size: clamp(25px, 1.9cqw, 33px);
  line-height: 1.12;
}

.feature-review ol {
  display: grid;
  flex: 1;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-review li {
  display: flex;
  align-items: center;
  gap: 12px;
  border-radius: 8px;
  padding: 10px 13px;
  background: #f8f6ff;
}

.feature-review li > span {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--violet);
  color: #fff;
  font-size: 16px;
  font-weight: 900;
}

.feature-review li p {
  font-size: clamp(17px, 1.25cqw, 21px);
  font-weight: 800;
}

.feature-review li b { color: var(--violet); }

.penguin-evidence {
  display: grid;
  min-height: 0;
  grid-template-rows: 1.12fr 0.88fr;
  gap: 18px;
}

.species-features,
.correlation-evidence {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.species-features h2 { color: var(--blue); }

.pair-compare {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.pair-compare section {
  display: grid;
  min-height: 0;
  grid-template-columns: 1fr 1.15fr;
  grid-template-rows: auto 1fr;
  align-items: center;
  gap: 8px 13px;
  border-radius: 8px;
  padding: 13px;
  background: #f8fbff;
}

.pair-compare section > b {
  grid-column: 1 / -1;
  color: var(--blue);
  font-size: clamp(18px, 1.3cqw, 22px);
}

.pair-compare section > span {
  font-size: clamp(15px, 1.05cqw, 18px);
  font-weight: 900;
  line-height: 1.3;
}

.scatter-mini {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 80px;
  border-bottom: 2px solid var(--muted);
  border-left: 2px solid var(--muted);
  background: linear-gradient(#d7e0ea55 1px, transparent 1px) 0 0 / 100% 25%;
}

.scatter-mini i {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue);
}

.scatter-mini i:nth-child(1) { left: 12%; top: 62%; }
.scatter-mini i:nth-child(2) { left: 20%; top: 52%; }
.scatter-mini i:nth-child(3) { left: 29%; top: 68%; }
.scatter-mini i:nth-child(4) { left: 43%; top: 24%; background: var(--orange); }
.scatter-mini i:nth-child(5) { left: 51%; top: 35%; background: var(--orange); }
.scatter-mini i:nth-child(6) { left: 58%; top: 18%; background: var(--orange); }
.scatter-mini i:nth-child(7) { left: 74%; top: 48%; background: var(--green); }
.scatter-mini i:nth-child(8) { left: 82%; top: 59%; background: var(--green); }
.scatter-mini i:nth-child(9) { left: 89%; top: 42%; background: var(--green); }

.scatter-mini.weak i:nth-child(1) { left: 25%; top: 52%; }
.scatter-mini.weak i:nth-child(2) { left: 37%; top: 36%; }
.scatter-mini.weak i:nth-child(3) { left: 48%; top: 58%; }
.scatter-mini.weak i:nth-child(4) { left: 38%; top: 46%; }
.scatter-mini.weak i:nth-child(5) { left: 53%; top: 33%; }
.scatter-mini.weak i:nth-child(6) { left: 64%; top: 54%; }
.scatter-mini.weak i:nth-child(7) { left: 45%; top: 68%; }
.scatter-mini.weak i:nth-child(8) { left: 59%; top: 44%; }
.scatter-mini.weak i:nth-child(9) { left: 70%; top: 62%; }

.correlation-evidence h2 { color: var(--green); }

.correlation-bars {
  display: grid;
  gap: 8px;
}

.correlation-bars > div {
  display: grid;
  grid-template-columns: 110px 1fr 54px;
  align-items: center;
  gap: 10px;
}

.correlation-bars b,
.correlation-bars em {
  font-size: clamp(15px, 1.02cqw, 18px);
  font-style: normal;
  font-weight: 900;
}

.correlation-bars > div > span {
  display: block;
  height: 16px;
  overflow: hidden;
  border-radius: 999px;
  background: #e8eef4;
}

.correlation-bars i {
  display: block;
  width: var(--value);
  height: 100%;
  border-radius: inherit;
  background: var(--green);
}

.correlation-bars .negative i { background: var(--orange); }

.correlation-evidence > p {
  margin-top: auto;
  border-radius: 8px;
  padding: 9px 13px;
  background: #f2fbf6;
  font-size: clamp(15px, 1.08cqw, 19px);
  font-weight: 800;
}

.correlation-evidence > p strong { color: var(--green); }

/* 정보 교과 슬라이드와 같은 큰 글씨·단순한 카드 구성 */
.first-slide-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  align-items: stretch;
  gap: 26px;
}

.first-title {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.first-title .subtitle {
  max-width: 100%;
  font-size: clamp(25px, 2.15cqw, 34px);
  line-height: 1.42;
}

.concept-popup {
  display: grid;
  min-width: 0;
  min-height: 250px;
  place-items: center;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 6px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(23, 32, 51, 0.1);
}

.concept-popup img {
  display: block;
  min-width: 0;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.slide[data-slide="1"] .comparison h2 {
  padding: 17px 24px;
  font-size: clamp(30px, 2.45cqw, 42px);
}

.slide[data-slide="1"] th,
.slide[data-slide="1"] td {
  padding: 13px 20px;
  font-size: clamp(22px, 1.7cqw, 29px);
}

.slide[data-slide="1"] thead th {
  font-size: clamp(24px, 1.9cqw, 32px);
}

.process-overview {
  grid-template-rows: minmax(0, 1fr);
}

.process-figure {
  padding: 42px 54px;
}

.inspection-card {
  gap: 24px;
  padding: 30px;
}

.inspection-card header > span {
  width: 54px;
  height: 54px;
  flex-basis: 54px;
  font-size: 24px;
}

.inspection-card h2 {
  font-size: clamp(31px, 2.55cqw, 43px);
}

.inspection-card header p {
  font-size: clamp(19px, 1.45cqw, 25px);
}

.inspection-copy {
  font-size: clamp(25px, 1.95cqw, 33px);
  font-weight: 900;
  line-height: 1.42;
}

.practice-summary {
  display: grid;
  gap: 13px;
  margin-top: auto;
  border-radius: 8px;
  padding: 22px;
  background: #f6f8fb;
}

.practice-summary b {
  color: var(--blue);
  font-size: clamp(22px, 1.6cqw, 27px);
}

.practice-summary span {
  font-size: clamp(22px, 1.65cqw, 28px);
  font-weight: 900;
  line-height: 1.35;
}

.visual-card .penguin-counts {
  min-height: 220px;
}

.penguin-counts b,
.penguin-counts em {
  font-size: clamp(17px, 1.15cqw, 20px);
}

.bias-note {
  padding: 14px;
  font-size: clamp(20px, 1.45cqw, 25px);
}

.preprocess-card {
  gap: 24px;
  padding: 32px;
}

.preprocess-card header span {
  width: 54px;
  height: 54px;
  font-size: 25px;
}

.preprocess-card h2 {
  font-size: clamp(32px, 2.5cqw, 43px);
}

.preprocess-card > p {
  font-size: clamp(24px, 1.85cqw, 31px);
}

.practice-result {
  gap: 20px;
  padding: 28px;
}

.practice-result > b {
  font-size: clamp(25px, 1.85cqw, 31px);
}

.practice-result > span {
  font-size: clamp(24px, 1.8cqw, 30px);
}

.normalization-demo {
  padding: 25px;
}

.normalization-demo b {
  font-size: clamp(22px, 1.65cqw, 28px);
}

.normalization-demo span {
  font-size: clamp(18px, 1.25cqw, 22px);
}

.normalize-reason {
  border-radius: 8px;
  padding: 14px;
  background: #f6f8fb;
  color: var(--muted);
  font-size: clamp(20px, 1.4cqw, 24px) !important;
  text-align: center;
}

.feature-review,
.species-features,
.correlation-evidence {
  padding: 28px;
}

.feature-review h2,
.species-features h2,
.correlation-evidence h2 {
  font-size: clamp(29px, 2.25cqw, 38px);
}

.feature-review ol {
  gap: 18px;
}

.feature-review li {
  padding: 20px;
}

.feature-review li > span {
  width: 46px;
  height: 46px;
  flex-basis: 46px;
  font-size: 21px;
}

.feature-review li p {
  font-size: clamp(23px, 1.75cqw, 29px);
  line-height: 1.35;
}

.pair-compare section > b {
  font-size: clamp(21px, 1.5cqw, 26px);
}

.pair-compare section > span {
  font-size: clamp(19px, 1.35cqw, 23px);
}

.correlation-bars > div {
  grid-template-columns: 145px 1fr 70px;
}

.correlation-bars b,
.correlation-bars em {
  font-size: clamp(19px, 1.35cqw, 23px);
}

.correlation-evidence > p {
  padding: 14px 18px;
  font-size: clamp(20px, 1.45cqw, 25px);
}

.problem-card,
.case-card,
.data-branch,
.collection-methods,
.selection-process,
.collection-checks {
  box-shadow: none;
}

.problem-card {
  gap: 18px;
  padding: 27px;
}

.problem-card h2 {
  font-size: clamp(30px, 2.35cqw, 40px);
}

.problem-card > p {
  font-size: clamp(23px, 1.75cqw, 30px);
}

.example {
  padding: 13px 16px;
  font-size: clamp(19px, 1.4cqw, 24px);
}

.case-card {
  gap: 16px;
  padding: 27px;
}

.case-card::before { display: none; }

.case-card h2 {
  font-size: clamp(29px, 2.2cqw, 38px);
}

.case-card > p:not(.case-number) {
  font-size: clamp(22px, 1.65cqw, 28px);
}

.case-card > span {
  font-size: clamp(18px, 1.25cqw, 22px);
}

.data-root p {
  font-size: clamp(27px, 2.15cqw, 36px);
}

.branch-header h2 {
  font-size: clamp(32px, 2.5cqw, 43px);
}

.branch-header div p {
  font-size: clamp(19px, 1.4cqw, 24px);
}

.attribute-types h3,
.format-types h3 {
  font-size: clamp(27px, 2cqw, 35px);
}

.attribute-types section > p,
.format-types section > p {
  font-size: clamp(19px, 1.4cqw, 24px);
}

.collection-methods > h2,
.selection-process > h2,
.collection-checks > h2 {
  font-size: clamp(30px, 2.3cqw, 39px);
}

.method-card h3 {
  font-size: clamp(26px, 1.95cqw, 33px);
}

.method-card b {
  font-size: clamp(18px, 1.25cqw, 22px);
}

.selection-flow h3 {
  font-size: clamp(22px, 1.6cqw, 27px);
}

.selection-flow b {
  font-size: clamp(17px, 1.15cqw, 20px);
}

.check-grid b {
  font-size: clamp(22px, 1.55cqw, 26px);
}

.check-grid p {
  font-size: clamp(18px, 1.2cqw, 21px);
}

.problem-list {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-rows: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.problem-list article {
  display: grid;
  min-height: 0;
  grid-template-columns: 62px 245px minmax(0, 1fr) 400px;
  align-items: center;
  gap: 18px;
  border: 2px solid var(--line);
  border-left: 10px solid var(--blue);
  border-radius: 8px;
  padding: 14px 22px;
  background: #fff;
}

.problem-list article:nth-child(2) { border-left-color: var(--green); }
.problem-list article:nth-child(3) { border-left-color: var(--orange); }
.problem-list article:nth-child(4) { border-left-color: #e84a5f; }
.problem-list article:nth-child(5) { border-left-color: #7c3aed; }

.problem-list article > span {
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  border-radius: 50%;
  background: #eef5ff;
  color: var(--blue);
  font-size: 20px;
  font-weight: 900;
}

.problem-list h2 {
  color: var(--blue);
  font-size: clamp(29px, 2.2cqw, 38px);
  line-height: 1.1;
}

.problem-list p {
  font-size: clamp(23px, 1.75cqw, 30px);
  font-weight: 900;
  line-height: 1.3;
}

.problem-list article > b {
  border-radius: 8px;
  padding: 12px 15px;
  background: #f6f8fb;
  color: var(--muted);
  font-size: clamp(19px, 1.35cqw, 23px);
  line-height: 1.25;
}

.case-link-map {
  display: grid;
  width: 100%;
  flex: 1;
  min-width: 0;
  min-height: 0;
  grid-template-rows: repeat(6, minmax(0, 1fr));
  gap: 11px;
}

.case-connection {
  display: grid;
  width: 100%;
  min-width: 0;
  min-height: 0;
  grid-template-columns: 48% 6% 46%;
  align-items: center;
}

.type-combo {
  display: flex;
  width: 100%;
  min-width: 0;
  height: 100%;
  min-height: 0;
  align-items: center;
  justify-content: stretch;
  gap: 12px;
}

.type-combo > span {
  display: grid;
  width: auto;
  min-width: 0;
  min-height: 0;
  flex: 1;
  height: calc(100% - 4px);
  place-items: center;
  border: 3px solid var(--blue);
  border-radius: 8px;
  padding: 8px 16px;
  background: #eef5ff;
  color: var(--blue);
  font-size: clamp(21px, 1.5cqw, 26px);
  font-weight: 900;
  text-align: center;
}

.type-combo > i {
  color: var(--muted);
  font-size: 30px;
  font-style: normal;
  font-weight: 900;
}

.type-combo .type-cluster {
  border-color: var(--green);
  background: #eefbf4;
  color: var(--green);
}

.type-combo .type-recognize {
  border-color: var(--orange);
  background: #fff7ed;
  color: #c66b0d;
}

.type-combo .type-language {
  border-color: #e84a5f;
  background: #fff5f6;
  color: #c83449;
}

.type-combo .type-generate {
  border-color: #7c3aed;
  background: #f5f3ff;
  color: #6d28d9;
}

.case-arrow {
  display: grid;
  place-items: center;
  color: var(--blue);
  font-size: 42px;
  font-weight: 900;
}

.case-connection article {
  display: flex;
  width: 100%;
  min-width: 0;
  height: 100%;
  min-height: 0;
  align-items: center;
  gap: 20px;
  border: 2px solid var(--line);
  border-left: 10px solid var(--blue);
  border-radius: 8px;
  padding: 11px 24px;
  background: #fff;
}

.case-connection article h2 {
  width: 52%;
  min-width: 0;
  color: var(--blue);
  font-size: clamp(25px, 1.85cqw, 32px);
  line-height: 1.1;
}

.case-connection article p {
  min-width: 0;
  flex: 1;
  color: var(--muted);
  font-size: clamp(21px, 1.5cqw, 26px);
  font-weight: 900;
  line-height: 1.2;
}

.case-map-row {
  display: grid;
  min-height: 0;
  grid-template-columns: 300px 90px minmax(0, 1fr);
  align-items: center;
}

.case-map-row > h2 {
  display: grid;
  height: calc(100% - 6px);
  min-height: 54px;
  place-items: center;
  border: 3px solid var(--blue);
  border-radius: 8px;
  background: #eef5ff;
  color: var(--blue);
  font-size: clamp(27px, 2.05cqw, 35px);
  text-align: center;
}

.recognition-row > h2 {
  border-color: var(--green);
  background: #eefbf4;
  color: var(--green);
}

.language-row > h2 {
  border-color: var(--orange);
  background: #fff7ed;
  color: #c66b0d;
}

.empty-row > h2 {
  border-color: #b6c4d6;
  background: #f6f8fb;
  color: var(--muted);
}

.link-line {
  display: block;
  height: 4px;
  background: var(--blue);
}

.recognition-row .link-line { background: var(--green); }
.language-row .link-line { background: var(--orange); }

.muted-line {
  height: 0;
  border-top: 3px dashed #b6c4d6;
  background: transparent;
}

.linked-cases {
  position: relative;
  display: grid;
  height: 100%;
  min-height: 0;
  align-content: stretch;
  gap: 7px;
  border-left: 4px solid var(--blue);
  padding-left: 34px;
}

.recognition-row .linked-cases { border-left-color: var(--green); }
.language-row .linked-cases { border-left-color: var(--orange); }

.linked-cases p {
  position: relative;
  display: grid;
  min-height: 0;
  grid-template-columns: 350px 1fr;
  align-items: center;
  gap: 18px;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 9px 18px;
  background: #fff;
}

.linked-cases p::before {
  position: absolute;
  top: 50%;
  left: -36px;
  width: 34px;
  height: 4px;
  transform: translateY(-50%);
  background: var(--blue);
  content: "";
}

.recognition-row .linked-cases p::before { background: var(--green); }
.language-row .linked-cases p::before { background: var(--orange); }

.linked-cases b {
  color: var(--blue);
  font-size: clamp(22px, 1.65cqw, 28px);
}

.recognition-row .linked-cases b { color: var(--green); }
.language-row .linked-cases b { color: #c66b0d; }

.linked-cases span {
  color: var(--muted);
  font-size: clamp(20px, 1.45cqw, 25px);
  font-weight: 900;
}

.no-case {
  border: 2px dashed #cbd5e1;
  border-radius: 8px;
  padding: 10px 18px;
  color: var(--muted);
  font-size: clamp(18px, 1.25cqw, 22px);
  font-weight: 800;
}

.notebook-result {
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  justify-content: center;
  gap: 20px;
  border-radius: 8px;
  padding: 24px;
  background: #f6f8fb;
}

.notebook-result > code,
.visual-code,
.normalize-code,
.scatter-codes code,
.correlation-evidence > code {
  width: max-content;
  max-width: 100%;
  border-radius: 6px;
  padding: 9px 13px;
  background: #172033;
  color: #fff;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(17px, 1.15cqw, 20px);
  font-weight: 800;
}

.notebook-result > div:not(.stat-values) {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr;
  align-items: baseline;
  gap: 8px 12px;
}

.notebook-result > div > b {
  color: var(--blue);
  font-size: clamp(34px, 2.8cqw, 48px);
}

.notebook-result > div > span {
  color: var(--muted);
  font-size: clamp(22px, 1.65cqw, 28px);
  font-weight: 900;
}

.stat-values {
  display: grid;
  gap: 12px;
}

.stat-values span {
  border-radius: 8px;
  padding: 13px 15px;
  background: #fff;
}

.stat-values b { color: var(--green); }

.visual-code {
  font-size: clamp(15px, 1.02cqw, 18px);
}

.normalize-code {
  background: #08783e;
}

.scatter-codes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.scatter-codes code {
  width: 100%;
  padding: 8px 11px;
  overflow-wrap: anywhere;
  font-size: clamp(12px, 0.78cqw, 15px);
  line-height: 1.25;
}

.scatter-results {
  display: grid;
  flex: 1;
  min-height: 0;
  place-items: center;
  overflow: hidden;
}

.scatter-results img {
  display: block;
  width: auto;
  max-width: 100%;
  height: 100%;
  max-height: 280px;
  object-fit: contain;
}

.correlation-evidence > code {
  width: 100%;
  padding: 7px 10px;
  overflow-wrap: anywhere;
  font-size: clamp(13px, 0.85cqw, 16px);
}

.case-network {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: 290px minmax(220px, 1fr) 720px;
  gap: 20px;
}

.type-column {
  display: grid;
  min-height: 0;
  grid-template-rows: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.type-column > div {
  display: grid;
  min-height: 0;
  place-items: center;
  border: 3px solid var(--blue);
  border-radius: 8px;
  background: #eef5ff;
  color: var(--blue);
  font-size: clamp(27px, 2cqw, 34px);
  font-weight: 900;
  text-align: center;
}

.type-column .type-cluster {
  border-color: var(--green);
  background: #eefbf4;
  color: var(--green);
}

.type-column .type-recognize {
  border-color: var(--orange);
  background: #fff7ed;
  color: #c66b0d;
}

.type-column .type-language {
  border-color: #e84a5f;
  background: #fff5f6;
  color: #c83449;
}

.type-column .type-generate {
  border-color: #7c3aed;
  background: #f5f3ff;
  color: #6d28d9;
}

.merge-column,
.case-column {
  display: grid;
  min-height: 0;
  grid-template-rows: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.merge-route {
  position: relative;
  min-height: 0;
}

.merge-route::after {
  position: absolute;
  top: 50%;
  right: 18px;
  left: 68%;
  height: 4px;
  transform: translateY(-50%);
  background: #64748b;
  content: "";
}

.merge-route > i {
  position: absolute;
  top: 50%;
  right: -2px;
  z-index: 2;
  transform: translateY(-52%);
  color: #64748b;
  font-size: 40px;
  font-style: normal;
  font-weight: 900;
}

.branch {
  position: absolute;
  top: calc(50% - 2px);
  left: 0;
  width: 69%;
  height: 4px;
  transform-origin: right center;
  background: var(--blue);
}

.branch::before {
  position: absolute;
  top: 50%;
  left: -2px;
  width: 12px;
  height: 12px;
  transform: translateY(-50%);
  border-radius: 50%;
  background: inherit;
  content: "";
}

.branch.cluster { background: var(--green); }
.branch.recognize { background: var(--orange); }
.branch.language { background: #e84a5f; }
.branch.generate { background: #7c3aed; }

.merge-route.two .branch:nth-child(1) { transform: rotate(6deg); }
.merge-route.two .branch:nth-child(2) { transform: rotate(-6deg); }
.merge-route.three .branch:nth-child(1) { transform: rotate(8deg); }
.merge-route.three .branch:nth-child(2) { transform: rotate(0); }
.merge-route.three .branch:nth-child(3) { transform: rotate(-8deg); }

.case-column article {
  display: grid;
  min-height: 0;
  grid-template-columns: 390px 1fr;
  align-items: center;
  gap: 20px;
  border: 2px solid var(--line);
  border-left: 10px solid var(--blue);
  border-radius: 8px;
  padding: 10px 22px;
  background: #fff;
}

.case-column h2 {
  color: var(--blue);
  font-size: clamp(25px, 1.85cqw, 32px);
  line-height: 1.08;
}

.case-column p {
  color: var(--muted);
  font-size: clamp(20px, 1.45cqw, 25px);
  font-weight: 900;
  line-height: 1.2;
}

.nav-zone {
  position: fixed;
  top: 0;
  bottom: 0;
  z-index: 5;
  width: 12cqw;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.nav-prev { left: 0; }
.nav-next { right: 0; }

.nav-zone span {
  position: absolute;
  top: 50%;
  display: block;
  width: 30px;
  height: 30px;
  opacity: 0.28;
  transform: translateY(-50%) rotate(45deg);
}

.nav-prev span {
  left: 20px;
  border-bottom: 6px solid var(--ink);
  border-left: 6px solid var(--ink);
}

.nav-next span {
  right: 20px;
  border-top: 6px solid var(--ink);
  border-right: 6px solid var(--ink);
}

.footer {
  position: fixed;
  right: 22px;
  bottom: 18px;
  left: 22px;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  pointer-events: none;
}

.footer p {
  border-radius: 999px;
  padding: 7px 12px;
  background: rgba(255, 255, 255, 0.86);
  color: var(--muted);
  font-size: 16px;
  font-weight: 900;
}

.dots {
  display: flex;
  gap: 8px;
  pointer-events: auto;
}

.dot {
  width: 12px;
  height: 12px;
  border: 0;
  border-radius: 50%;
  background: #b6c4d6;
  cursor: pointer;
}

.dot.active {
  width: 34px;
  border-radius: 999px;
  background: var(--blue);
}

/* 1920×1080 수업용 PPT 가독성 보정: 큰 글자, 내용 중심 카드 */
.slide.active {
  gap: 16px;
}

.problem-list {
  flex: 0 0 auto;
  grid-template-rows: repeat(5, 140px);
  gap: 12px;
}

.problem-list article {
  grid-template-columns: 58px 230px minmax(0, 1fr) 370px;
  padding: 14px 20px;
}

.problem-list h2 { font-size: 36px; }
.problem-list p { font-size: 28px; }
.problem-list article > b { font-size: 22px; }

.case-link-map {
  flex: 0 0 auto;
  grid-template-rows: repeat(6, 125px);
  gap: 10px;
}

.type-combo {
  justify-content: flex-start;
}

.type-combo > span {
  flex: 0 0 225px;
  height: 112px;
  padding: 8px 12px;
  font-size: 29px;
}

.type-combo > i {
  flex: 0 0 auto;
  font-size: 34px;
}

.single-type > span {
  flex-basis: 225px;
}

.case-arrow { font-size: 48px; }

.case-connection article {
  height: 112px;
  padding: 10px 24px;
}

.case-connection article h2 {
  font-size: 33px;
}

.case-connection article p {
  font-size: 25px;
}

.data-root {
  padding: 13px 24px;
}

.root-label { font-size: 38px; }
.data-root p { font-size: 32px; }
.data-root > span { font-size: 23px; }

.data-branches {
  flex: 0 0 auto;
  align-items: start;
}

.data-branch {
  gap: 14px;
  padding: 20px;
}

.branch-header h2 { font-size: 38px; }
.branch-header div p { font-size: 21px; }

.attribute-types,
.format-types {
  flex: 0 0 auto;
}

.format-types {
  grid-template-rows: repeat(2, auto);
}

.attribute-types section,
.format-types section {
  padding: 20px;
}

.attribute-types h3,
.format-types h3 { font-size: 34px; }

.attribute-types section > p,
.format-types section > p { font-size: 22px; }

.numeric-children {
  flex: 0 0 210px;
}

.numeric-children b { font-size: 26px; }
.numeric-children span { font-size: 19px; }
.numeric-children em { margin-top: auto; font-size: 18px; }
.category-type > span { margin-top: 70px; font-size: 20px; }
.mini-table { margin-top: 55px; }
.mini-table span,
.format-chips span { font-size: 18px; }
.format-chips { margin-top: 55px; }

.collection-layout {
  flex: 0 0 auto;
  align-items: start;
}

.collection-methods {
  grid-template-rows: auto repeat(3, 190px);
  padding: 22px;
}

.collection-methods > h2,
.selection-process > h2,
.collection-checks > h2 { font-size: 36px; }

.method-card { padding: 20px; }
.method-number { width: 58px; height: 58px; font-size: 28px; }
.method-card h3 { font-size: 31px; }
.method-card b { font-size: 20px; line-height: 1.35; }

.selection-column {
  grid-template-rows: 420px 340px;
}

.selection-flow h3 { font-size: 27px; }
.selection-flow b { font-size: 19px; line-height: 1.35; }
.selection-flow section { padding: 18px; }
.check-grid b { font-size: 25px; }
.check-grid p { font-size: 20px; }

.process-figure {
  padding: 20px 28px;
}

.process-figure img {
  width: min(100%, 1680px);
}

.inspection-grid,
.preprocess-grid {
  align-items: start;
}

.inspection-card,
.preprocess-card {
  height: 780px;
}

.inspection-card h2 { font-size: 42px; }
.inspection-card header p { font-size: 24px; }
.inspection-copy { font-size: 31px; }

.notebook-result {
  flex: 0 0 auto;
  min-height: 270px;
  padding: 28px;
}

.notebook-result > code,
.visual-code,
.normalize-code,
.plot-code,
.correlation-evidence > code {
  font-size: 23px;
}

.notebook-result > div > b { font-size: 50px; }
.notebook-result > div > span { font-size: 28px; }
.stat-values span { font-size: 23px; }

.visual-card .penguin-counts {
  flex: 0 0 380px;
  min-height: 380px;
}

.penguin-counts b,
.penguin-counts em { font-size: 19px; }
.bias-note { font-size: 22px; }

.preprocess-card h2 { font-size: 42px; }
.preprocess-card > p { font-size: 29px; }

.practice-result {
  flex: 0 0 auto;
  min-height: 330px;
  padding: 28px;
}

.practice-result code { font-size: 22px; }
.practice-result > span { font-size: 29px; }
.normalize-code { font-size: 23px; }

.normalization-demo {
  flex: 0 0 auto;
  min-height: 330px;
}

.normalization-demo b { font-size: 28px; }
.normalization-demo span { font-size: 21px; }
.normalization-demo .zero-one { font-size: 25px; }
.normalize-reason { font-size: 23px !important; }

.feature-layout {
  grid-template-columns: 0.62fr 1.38fr;
}

.feature-review,
.species-features,
.correlation-evidence { padding: 24px; }

.feature-review h2,
.species-features h2,
.correlation-evidence h2 { font-size: 35px; }

.feature-review ol {
  flex: 0 0 auto;
  gap: 16px;
}

.feature-review li {
  min-height: 190px;
  padding: 22px;
}

.feature-review li p { font-size: 28px; }

.penguin-evidence {
  grid-template-rows: 1.35fr 0.65fr;
}

.plot-code {
  width: max-content;
  border-radius: 6px;
  padding: 9px 13px;
  background: #172033;
  color: #fff;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-weight: 800;
}

.scatter-results img {
  max-height: 390px;
}

.correlation-bars b,
.correlation-bars em { font-size: 22px; }

.correlation-evidence > p { font-size: 23px; }

/* 교실 화면 가독성: 모든 슬라이드의 글자 위계를 한 단계 확대 */
.unit { font-size: 38px; }
.page-ref { font-size: 26px; }
h1 { font-size: 82px; }
.subtitle { font-size: 34px; }
.first-title .subtitle { font-size: 38px; }

.comparison-title {
  color: var(--ink);
  font-size: 46px;
  line-height: 1.1;
}

.slide[data-slide="1"] .comparison table {
  height: 100%;
}

.slide[data-slide="1"] .comparison thead th {
  border-bottom: 5px solid #93b9f6;
  background: #eaf2ff;
  color: var(--blue);
  font-size: 35px;
}

.slide[data-slide="1"] .comparison thead th:first-child {
  background: #f6f8fb;
}

.slide[data-slide="1"] .comparison thead th:last-child {
  background: #e9f9f0;
  color: var(--green);
}

.slide[data-slide="1"] th,
.slide[data-slide="1"] td { font-size: 32px; }
.slide[data-slide="1"] .flow { font-size: 28px; }

.problem-list h2 { font-size: 40px; }
.problem-list p { font-size: 32px; }
.problem-list article > b { font-size: 25px; }
.slide[data-slide="2"] .problem-list { grid-template-rows: repeat(5, 132px); }

.type-combo > span { font-size: 33px; }
.case-connection article h2 { font-size: 37px; }
.case-connection article p { font-size: 29px; }

.root-label { font-size: 42px; }
.data-root p { font-size: 36px; }
.data-root > span { font-size: 26px; }
.branch-header h2 { font-size: 42px; }
.branch-header div p { font-size: 24px; }
.attribute-types h3,
.format-types h3 { font-size: 38px; }
.attribute-types section > p,
.format-types section > p { font-size: 25px; }
.numeric-children b { font-size: 29px; }
.numeric-children span { font-size: 21px; }
.numeric-children em,
.category-type > span,
.mini-table span,
.format-chips span { font-size: 21px; }

.collection-methods > h2,
.selection-process > h2,
.collection-checks > h2 { font-size: 40px; }
.method-card h3 { font-size: 35px; }
.method-card b { font-size: 23px; }
.selection-flow h3 { font-size: 31px; }
.selection-flow b { font-size: 22px; }
.check-grid b { font-size: 29px; }
.check-grid p { font-size: 23px; }

.process-figure img { width: min(100%, 1780px); }

.inspection-card h2,
.preprocess-card h2 { font-size: 46px; }
.inspection-card header p { font-size: 27px; }
.inspection-copy { font-size: 34px; }
.notebook-result > code,
.visual-code,
.normalize-code,
.plot-code,
.correlation-evidence > code,
.practice-result code { font-size: 26px; }
.notebook-result > div > b { font-size: 54px; }
.notebook-result > div > span { font-size: 31px; }
.stat-values span { font-size: 26px; }
.penguin-counts b,
.penguin-counts em { font-size: 22px; }
.bias-note { font-size: 25px; }

.preprocess-card > p { font-size: 32px; }
.practice-result > span { font-size: 32px; }
.normalization-demo b { font-size: 31px; }
.normalization-demo span { font-size: 24px; }
.normalization-demo .zero-one { font-size: 28px; }
.normalize-reason { font-size: 26px !important; }

.feature-review h2,
.species-features h2,
.correlation-evidence h2 { font-size: 39px; }
.feature-review li p { font-size: 31px; }
.correlation-bars b,
.correlation-bars em { font-size: 25px; }
.correlation-evidence > p { font-size: 26px; }

/* 7~9쪽: 캡처 중심 구성과 하단 페이지 표시 여백 */
.visual-card .penguin-counts {
  flex: 0 0 380px;
  min-height: 380px;
}

.visual-card .bias-note {
  flex: 0 0 auto;
  margin-top: 0;
  padding: 15px 12px;
  line-height: 1.25;
}

.outlier-code-row {
  display: flex;
  gap: 10px;
}

.outlier-code-row code {
  border-radius: 7px;
  padding: 9px 12px;
  background: #172033;
  color: #fff;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 21px;
  font-weight: 800;
}

.outlier-figures {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-rows: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 10px;
}

.outlier-item {
  display: grid;
  min-height: 0;
  grid-template-columns: 104px minmax(0, 1fr);
  align-items: stretch;
  gap: 10px;
}

.outlier-item > h3 {
  display: grid;
  min-height: 0;
  place-items: center;
  border-radius: 8px;
  background: #fff3e8;
  color: #d76b08;
  font-size: 28px;
  line-height: 1.25;
  text-align: center;
}

.outlier-figures figure,
.normalization-capture,
.heatmap-capture {
  display: flex;
  min-height: 0;
  flex-direction: column;
  overflow: hidden;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

/* 7쪽: 세 영역을 같은 너비로, 시각화 그래프는 카드 안에서 축소 */
.slide[data-slide="7"] .inspection-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.slide[data-slide="7"] .visual-card .penguin-counts {
  width: 82%;
  align-self: center;
}

.slide[data-slide="8"] .preprocess-card {
  height: 736px;
}

.outlier-figures img,
.normalization-capture img,
.heatmap-capture img {
  display: block;
  width: 100%;
  min-height: 0;
  flex: 1;
  object-fit: contain;
}

.outlier-figures figcaption,
.normalization-capture figcaption {
  flex: 0 0 auto;
  padding: 6px 10px 8px;
  color: var(--muted);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.2;
  text-align: center;
}

.minmax-summary {
  display: grid;
  gap: 8px;
  border-radius: 8px;
  padding: 15px 18px;
  background: #f2fbf6;
}

.minmax-summary h3 {
  padding-bottom: 8px;
  border-bottom: 3px solid #86d7ac;
  color: var(--green);
  font-size: 31px;
  line-height: 1.1;
}

.minmax-summary > p:not(.minmax-formula) {
  color: var(--muted);
  font-size: 23px;
  font-weight: 800;
  line-height: 1.32;
}

.minmax-summary strong,
.minmax-summary b { color: var(--green); }

.minmax-formula {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 27px;
  font-weight: 700;
}

.minmax-formula .fraction {
  display: grid;
  text-align: center;
}

.minmax-formula .fraction i {
  padding: 2px 9px;
  font-style: normal;
}

.minmax-formula .fraction i:first-child {
  border-bottom: 2px solid currentColor;
}

.normalization-capture {
  flex: 1;
}

.normalize-card {
  gap: 14px;
  padding: 28px;
}

.normalize-card .minmax-summary {
  flex: 0 0 auto;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 10px;
  row-gap: 0;
  padding: 12px 16px;
}

.normalize-card .minmax-summary h3 {
  grid-column: 1;
  grid-row: 1;
  border-bottom: 0;
  padding-bottom: 0;
  font-size: 29px;
}

.normalize-card .minmax-summary > p:not(.minmax-formula) {
  grid-column: 1;
  grid-row: 2;
  font-size: 22px;
  line-height: 1.25;
}

.normalize-card .minmax-formula {
  grid-column: 2;
  grid-row: 1 / 3;
  font-size: 25px;
}

/* 9쪽: 교과서의 핵심 속성 추출 방법 다섯 항목 */
.slide[data-slide="9"] .feature-review ol {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-rows: repeat(5, minmax(0, 1fr));
  align-content: stretch;
  gap: 6px;
  overflow: hidden;
}

.slide[data-slide="9"] .feature-review li {
  min-height: 0;
  overflow: hidden;
  padding: 8px 12px;
}

.slide[data-slide="9"] .feature-review li p {
  font-size: 25px;
  line-height: 1.2;
}

/* 9쪽 최종 구성: 왼쪽 방법, 오른쪽 정형·비정형 2행 */
.slide[data-slide="9"] .feature-layout {
  grid-template-columns: minmax(0, 0.62fr) minmax(0, 1.38fr);
}

.slide[data-slide="9"] .feature-review ol {
  flex: 1;
  grid-template-rows: repeat(5, 100px);
  align-content: center;
  gap: 10px;
}

.slide[data-slide="9"] .feature-review li {
  padding: 10px 14px;
}

.slide[data-slide="9"] .feature-review li p {
  font-size: 30px;
  line-height: 1.16;
}

.feature-data-panels {
  display: grid;
  min-width: 0;
  min-height: 0;
  grid-template-rows: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: 18px;
}

.structured-feature,
.unstructured-feature {
  display: flex;
  min-width: 0;
  min-height: 0;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 20px 22px;
  background: #fff;
}

.structured-feature { border-top: 9px solid var(--blue); }
.unstructured-feature { border-top: 9px solid var(--green); }

.structured-feature > h2,
.unstructured-feature > h2 {
  font-size: 37px;
  line-height: 1.05;
}

.structured-feature > h2 { color: var(--blue); }
.unstructured-feature > h2 { color: var(--green); }

.structured-tools {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.structured-tools figure {
  display: flex;
  min-width: 0;
  min-height: 0;
  flex-direction: column;
  gap: 8px;
}

.structured-tools code {
  width: 100%;
  border-radius: 6px;
  padding: 8px 10px;
  background: #172033;
  color: #fff;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 21px;
  font-weight: 800;
  text-align: center;
}

.structured-tools img {
  display: block;
  width: 100%;
  min-height: 0;
  flex: 1;
  border: 2px solid var(--line);
  border-radius: 7px;
  object-fit: contain;
}

.unstructured-feature figure {
  display: grid;
  flex: 1;
  min-height: 0;
  place-items: center;
  overflow: hidden;
}

.unstructured-feature img {
  display: block;
  width: auto;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.normalize-card .normalization-capture img {
  object-fit: contain;
}

.slide[data-slide="9"] {
  padding-bottom: 94px;
}

.slide[data-slide="9"] .feature-review li {
  min-height: 170px;
}

.slide[data-slide="9"] .penguin-evidence {
  grid-template-rows: 1fr 1fr;
}

.heatmap-capture {
  flex: 1;
}

.correlation-evidence > p {
  flex: 0 0 auto;
  margin-top: 0;
  padding: 10px 13px;
  line-height: 1.25;
}

/* 4쪽: 데이터 속성과 데이터 유형을 1:2 비율로 비교 */
.slide[data-slide="4"] .data-root {
  padding: 12px 22px;
}

.slide[data-slide="4"] .data-root::after,
.slide[data-slide="4"] .data-branches::before,
.slide[data-slide="4"] .data-branch::before {
  display: none;
}

.slide[data-slide="4"] .data-branches {
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  align-items: stretch;
}

.slide[data-slide="4"] .data-branch {
  height: 615px;
  padding: 18px;
}

.slide[data-slide="4"] .branch-header {
  min-height: 90px;
  padding-bottom: 12px;
}

.slide[data-slide="4"] .branch-header div p {
  font-size: 28px;
  line-height: 1.25;
}

.slide[data-slide="4"] .attribute-types,
.slide[data-slide="4"] .format-types {
  flex: 1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: minmax(0, 1fr);
  gap: 12px;
}

.slide[data-slide="4"] .attribute-types section,
.slide[data-slide="4"] .format-types section {
  padding: 16px;
}

.slide[data-slide="4"] .attribute-types h3,
.slide[data-slide="4"] .format-types h3 {
  font-size: 34px;
}

.slide[data-slide="4"] .attribute-types section > p,
.slide[data-slide="4"] .format-types section > p {
  font-size: 24px;
  line-height: 1.25;
}

.slide[data-slide="4"] .numeric-children {
  flex: 1;
  min-height: 0;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding-top: 0;
}

.slide[data-slide="4"] .numeric-children::before {
  display: none;
}

.slide[data-slide="4"] .numeric-children > div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  padding: 10px 12px;
}

.slide[data-slide="4"] .numeric-children b {
  font-size: 28px;
}

.slide[data-slide="4"] .numeric-children span {
  font-size: 22px;
  line-height: 1.2;
}

.slide[data-slide="4"] .numeric-children em {
  margin-top: 0;
  font-size: 21px;
  line-height: 1.2;
}

.slide[data-slide="4"] .category-examples {
  display: grid;
  gap: 12px;
  margin-top: auto;
}

.slide[data-slide="4"] .category-examples span {
  border-radius: 8px;
  padding: 12px 14px;
  background: #fff;
  color: var(--muted);
  font-size: 23px;
  font-weight: 900;
  line-height: 1.3;
}

.slide[data-slide="4"] .category-examples b {
  color: var(--blue);
}

.iris-example {
  display: flex;
  min-height: 0;
  flex: 1;
  flex-direction: column;
  margin-top: 4px;
  overflow: hidden;
  border: 2px solid #bbf7d0;
  border-radius: 8px;
  background: #fff;
}

.iris-example img {
  display: block;
  width: 100%;
  min-height: 0;
  flex: 1;
  object-fit: contain;
}

.iris-example figcaption {
  flex: 0 0 auto;
  padding: 6px 10px 8px;
  color: var(--muted);
  font-size: 21px;
  font-weight: 900;
  line-height: 1.2;
  text-align: center;
}

/* 1쪽: 쪽수 아래에 큰 개념 그림, 아래쪽에 간결한 비교표 */
.slide[data-slide="1"] .first-slide-header {
  position: relative;
  min-height: 450px;
  grid-template-columns: minmax(0, 1fr) 560px;
  gap: 32px;
}

.slide[data-slide="1"] .first-slide-header > .page-ref {
  top: 0;
  right: 0;
}

.slide[data-slide="1"] .concept-popup {
  height: 365px;
  min-height: 0;
  margin-top: 64px;
  padding: 2px;
}

.slide[data-slide="1"] .concept-popup img {
  width: 100%;
  height: 100%;
}

.slide[data-slide="1"] .comparison {
  flex: 0 0 345px;
}

.slide[data-slide="1"] .comparison th,
.slide[data-slide="1"] .comparison td {
  padding-top: 8px;
  padding-bottom: 8px;
  line-height: 1.12;
}

/* 5쪽: 2행×2열, 왼쪽 수집 방법은 두 행을 모두 차지 */
.slide[data-slide="5"] .collection-layout {
  height: 760px;
  flex: 0 0 760px;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  grid-template-rows: repeat(2, minmax(0, 1fr));
  align-items: stretch;
  gap: 18px;
}

.slide[data-slide="5"] .collection-methods {
  height: auto;
  grid-column: 1;
  grid-row: 1 / 3;
  grid-template-rows: auto repeat(3, minmax(0, 1fr));
}

.slide[data-slide="5"] .selection-column {
  display: contents;
}

.slide[data-slide="5"] .selection-process {
  grid-column: 2;
  grid-row: 1;
}

.slide[data-slide="5"] .collection-checks {
  grid-column: 2;
  grid-row: 2;
}

.slide[data-slide="5"] .selection-flow b {
  font-size: 26px;
}

.slide[data-slide="5"] .check-grid p {
  font-size: 26px;
}

/* 9쪽: 검토·산점도·히트맵을 같은 높이의 3열로 배치 */
.slide[data-slide="9"] .feature-layout {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.slide[data-slide="9"] .penguin-evidence {
  display: contents;
}

.slide[data-slide="9"] .feature-review,
.slide[data-slide="9"] .species-features,
.slide[data-slide="9"] .correlation-evidence {
  height: 100%;
}

.slide[data-slide="9"] .feature-review li {
  min-height: 170px;
}

.slide[data-slide="9"] .heatmap-capture {
  flex: 1;
}

.slide[data-slide="9"] .scatter-results {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 10px;
  overflow: hidden;
}

.slide[data-slide="9"] .scatter-results figure {
  display: grid;
  min-height: 0;
  place-items: center;
  overflow: hidden;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.slide[data-slide="9"] .scatter-results img {
  display: block;
  width: 100%;
  height: 100%;
  max-height: none;
  object-fit: contain;
}

.scatter-conclusion {
  flex: 0 0 auto;
  border-radius: 8px;
  padding: 10px 13px;
  background: #eef5ff;
  font-size: 25px;
  font-weight: 800;
  line-height: 1.25;
}

.scatter-conclusion strong { color: var(--blue); }

/* 8쪽: 세 전처리 카드의 코드·결과 위계를 동일하게 표시 */
.missing-code-row,
.outlier-code-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.missing-code-row code,
.outlier-code-row code,
.normalize-code {
  width: max-content;
  border-radius: 7px;
  padding: 9px 12px;
  background: #172033;
  color: #fff;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 21px;
  font-weight: 800;
}

.missing-result {
  display: grid;
  flex: 1;
  min-height: 0;
  align-content: center;
  gap: 10px;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  background: #fff;
  font-size: 31px;
  font-weight: 900;
  line-height: 1.35;
}

.missing-result strong {
  display: block;
  color: var(--blue);
  font-size: 42px;
}

.normalize-card .minmax-summary {
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto auto auto;
}

.normalize-card .minmax-formula {
  grid-column: 1;
  grid-row: 3;
  justify-content: center;
  padding-top: 4px;
  font-size: 25px;
}

/* 9쪽 최종 우선순위: 기존 3열 규칙을 덮어쓰는 2열·2행 구성 */
.slide[data-slide="9"] .feature-layout {
  grid-template-columns: minmax(0, 0.64fr) minmax(0, 1.36fr);
  gap: 18px;
}

.slide[data-slide="9"] .feature-review li {
  min-height: 0;
}

.slide[data-slide="9"] .feature-data-panels {
  grid-column: 2;
  width: 100%;
}

.slide[data-slide="1"] .comparison-title::before {
  content: none;
}

/* 1쪽 비교 영역: 제목과 표를 하나의 배경 패널 안에 배치 */
.slide[data-slide="1"] .comparison {
  display: flex;
  width: calc(100% - 110px);
  flex: 0 0 400px;
  align-self: center;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
  border: 0;
  border-radius: 10px;
  padding: 18px 22px 22px;
  background: #eef5ff;
}

.slide[data-slide="1"] .comparison-title {
  padding: 0;
  background: transparent;
  color: var(--blue);
  font-size: 42px;
  line-height: 1.08;
}

.slide[data-slide="1"] .comparison table {
  min-height: 0;
  height: auto;
  flex: 1;
  overflow: hidden;
  border: 2px solid #b9cce5;
  border-radius: 8px;
  border-collapse: separate;
  border-spacing: 0;
  background: #fff;
}