/* LEARNING-DISCOSCM-EXPERIMENT-STYLE-2026-07-16-V1 */
:root {
  --ink: #172033;
  --ink-soft: #596277;
  --paper: #f6f2e9;
  --paper-deep: #ece7db;
  --white: #fffdf8;
  --blue: #3157c8;
  --blue-deep: #203b91;
  --blue-soft: #e8edff;
  --orange: #d85f38;
  --orange-soft: #fff0e8;
  --green: #147b68;
  --green-soft: #e5f4ef;
  --amber: #b67a18;
  --amber-soft: #fff5d9;
  --red: #a94435;
  --red-soft: #fceae5;
  --violet: #7155b7;
  --violet-soft: #eee9fb;
  --dark: #10182a;
  --line: rgba(23, 32, 51, 0.14);
  --line-dark: rgba(255, 255, 255, 0.15);
  --serif: "Iowan Old Style", "Palatino Linotype", "Songti SC", STSong, serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --shadow: 0 24px 70px rgba(28, 36, 57, 0.09);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
code { font-family: var(--mono); }

.wrap {
  width: min(1160px, calc(100% - 56px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 9px 14px;
  color: white;
  background: var(--blue);
  border-radius: 8px;
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.topbar {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid rgba(23, 32, 51, 0.1);
  background: rgba(246, 242, 233, 0.91);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.topbar-inner {
  width: min(1240px, calc(100% - 42px));
  min-height: 70px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  line-height: 1.15;
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: white;
  background: var(--ink);
  border-radius: 9px;
  font-family: var(--serif);
  font-size: 23px;
  font-style: italic;
}

.brand strong { display: block; font-size: 14px; }
.brand small { display: block; margin-top: 3px; color: var(--ink-soft); font-size: 10px; letter-spacing: 0.11em; text-transform: uppercase; }

.topbar nav {
  display: flex;
  align-items: center;
  gap: 22px;
  overflow-x: auto;
  scrollbar-width: none;
}

.topbar nav::-webkit-scrollbar { display: none; }
.topbar nav a { flex: 0 0 auto; color: var(--ink-soft); font-size: 12px; font-weight: 720; text-decoration: none; }
.topbar nav a:hover { color: var(--blue); }

.hero {
  min-height: 720px;
  padding-block: 92px 110px;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(400px, 0.96fr);
  align-items: center;
  gap: 72px;
}

.eyebrow,
.kicker {
  margin: 0;
  color: var(--blue);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 720px;
  margin: 18px 0 0;
  font-family: var(--serif);
  font-size: clamp(49px, 5.4vw, 76px);
  font-weight: 520;
  letter-spacing: -0.055em;
  line-height: 1.07;
}

.hero h1 em { color: var(--blue); font-style: normal; }

.hero-deck {
  max-width: 710px;
  margin: 29px 0 0;
  color: #414b61;
  font-size: clamp(18px, 1.7vw, 21px);
  line-height: 1.73;
}

.boundary-banner {
  max-width: 720px;
  margin-top: 27px;
  padding: 15px 17px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 13px;
  align-items: start;
  color: #6a3528;
  background: var(--orange-soft);
  border: 1px solid rgba(216, 95, 56, 0.24);
  border-radius: 11px;
}

.boundary-banner span {
  padding: 3px 8px;
  color: white;
  background: var(--orange);
  border-radius: 999px;
  font-size: 9px;
  font-weight: 850;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.boundary-banner strong { font-size: 13px; line-height: 1.6; }

.hero-actions {
  margin-top: 31px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 11px;
}

.button {
  min-height: 48px;
  padding: 11px 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 13px;
  font-weight: 760;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.button:hover { transform: translateY(-2px); }
.button.primary { color: white; background: var(--blue); border-color: var(--blue); box-shadow: 0 10px 24px rgba(49, 87, 200, 0.22); }
.button.primary:hover { background: var(--blue-deep); }
.button.secondary { background: rgba(255, 253, 248, 0.75); }
.text-link { margin-left: 5px; color: var(--ink-soft); font-size: 12px; font-weight: 720; text-underline-offset: 4px; }

.hero-figure {
  position: relative;
  margin: 0;
  padding: 28px 24px 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 4px 26px 4px 26px;
  box-shadow: var(--shadow);
}

.hero-figure::before {
  content: "";
  position: absolute;
  top: -10px;
  right: 30px;
  width: 74px;
  height: 21px;
  background: rgba(216, 95, 56, 0.58);
  transform: rotate(2deg);
}

.hero-figure figcaption { padding: 0 10px; }
.hero-figure figcaption span { display: block; color: var(--orange); font-size: 10px; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.hero-figure figcaption strong { display: block; margin-top: 3px; font-family: var(--serif); font-size: 21px; }
.hero-figure svg { width: 100%; height: auto; display: block; margin-top: 10px; }

.grid-lines line { stroke: rgba(23, 32, 51, 0.1); stroke-width: 1; }
.grid-lines line:first-child,
.grid-lines line:nth-child(2) { stroke: rgba(23, 32, 51, 0.5); stroke-width: 1.4; }
.curve-band { fill: url(#curve-fill); }
.oracle-curve { fill: none; stroke: var(--blue); stroke-width: 5; stroke-linecap: round; }
.model-curve { fill: none; stroke: var(--orange); stroke-width: 4; stroke-linecap: round; stroke-dasharray: 10 8; }
.factual-guide { stroke: var(--orange); stroke-width: 1.5; stroke-dasharray: 4 5; }
.factual-point { fill: var(--orange); stroke: white; stroke-width: 4; }
.axis-labels text { fill: #7b8497; font: 11px var(--sans); }
.axis-labels .axis-name { fill: #4c566a; font-weight: 750; }
.chart-notes rect { fill: var(--blue-soft); }
.chart-notes .model-note { fill: var(--orange-soft); }
.chart-notes text { fill: var(--blue-deep); font: 700 10px var(--sans); }
.chart-notes .model-note + text { fill: #964329; }
.chart-notes .point-label { fill: #8d4430; font-size: 10px; }
.note-leader { fill: none; stroke: var(--orange); stroke-width: 1.4; }

.legend {
  padding: 0 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  color: var(--ink-soft);
  font-size: 9px;
  font-weight: 720;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 18px; height: 3px; display: inline-block; border-radius: 999px; }
.oracle-key { background: var(--blue); }
.model-key { background: repeating-linear-gradient(90deg, var(--orange) 0 6px, transparent 6px 9px); }
.legend .point-key { width: 7px; height: 7px; background: var(--orange); border-radius: 50%; }

.number-strip {
  color: white;
  background: var(--dark);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.numbers {
  min-height: 126px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  align-items: stretch;
}

.numbers > div {
  padding: 27px 18px 23px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: 1px solid rgba(255, 255, 255, 0.11);
}

.numbers > div:last-child { border-right: 1px solid rgba(255, 255, 255, 0.11); }
.numbers strong { color: #a9bdff; font-family: var(--serif); font-size: 34px; font-weight: 550; line-height: 1; }
.numbers span { margin-top: 8px; color: #aeb7c9; font-size: 9px; font-weight: 760; letter-spacing: 0.1em; text-transform: uppercase; }

.section { padding-block: 116px; }

.section-heading {
  margin-bottom: 48px;
  display: grid;
  grid-template-columns: 120px minmax(300px, 0.9fr) minmax(320px, 1.1fr);
  align-items: start;
  gap: 35px;
}

.section-number {
  width: 37px;
  height: 24px;
  display: grid;
  place-items: center;
  color: white;
  background: var(--blue);
  border-radius: 999px;
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.section-heading .kicker { margin-top: 13px; color: var(--ink-soft); line-height: 1.5; }
.section-heading h2 { margin: 0; font-family: var(--serif); font-size: clamp(38px, 4vw, 54px); font-weight: 530; letter-spacing: -0.045em; line-height: 1.12; }
.section-heading > p { margin: 3px 0 0; color: var(--ink-soft); font-size: 17px; }

.drawers {
  display: grid;
  grid-template-columns: 1fr 72px 1fr;
  align-items: stretch;
}

.drawer {
  min-width: 0;
  padding: 31px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 46px rgba(28, 36, 57, 0.06);
}

.drawer header { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.drawer header span { color: var(--ink-soft); font-size: 10px; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.drawer header strong { font-family: var(--serif); font-size: 23px; }
.learner-drawer { border-top: 5px solid var(--orange); }
.oracle-drawer { border-top: 5px solid var(--blue); }
.unit-id { margin-top: 23px; color: var(--orange); font: 750 11px var(--mono); }

.drawer dl { margin: 17px 0 0; }
.drawer dl > div { padding: 13px 0; display: grid; grid-template-columns: 150px 1fr; gap: 14px; border-bottom: 1px solid var(--line); }
.drawer dt { font-size: 13px; font-weight: 760; }
.drawer dd { min-width: 0; margin: 0; color: var(--ink-soft); overflow-x: auto; }
.drawer dd code { font-size: 12px; white-space: nowrap; }
.drawer aside { margin-top: 22px; padding: 17px; background: var(--orange-soft); border-radius: 10px; }
.oracle-drawer aside { background: var(--blue-soft); }
.drawer aside strong { font-size: 12px; }
.drawer aside p { margin: 7px 0 0; color: var(--ink-soft); font-size: 13px; line-height: 1.65; }

.drawer-arrow { display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--blue); font-family: var(--serif); font-size: 33px; }
.drawer-arrow span { color: var(--ink-soft); font: 700 8px var(--sans); letter-spacing: 0.08em; text-transform: uppercase; writing-mode: vertical-rl; }

.oracle-mini-grid { margin-top: 23px; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.oracle-mini-grid > div { min-height: 44px; padding: 8px 13px; display: grid; grid-template-columns: repeat(3, 1fr); align-items: center; border-bottom: 1px solid var(--line); }
.oracle-mini-grid > div:last-child { border-bottom: 0; }
.oracle-mini-grid .grid-head { color: var(--ink-soft); background: var(--paper); font-size: 9px; font-weight: 850; letter-spacing: 0.1em; text-transform: uppercase; }
.oracle-mini-grid strong { color: var(--blue); }
.oracle-mini-grid span { text-align: right; font-family: var(--mono); font-size: 12px; }
.oracle-mini-grid .grid-head span:first-child { text-align: left; }
.grid-caption { margin: 10px 0 0; color: var(--ink-soft); font-size: 11px; text-align: center; }

.takeaway {
  margin-top: 30px;
  padding: 27px 32px;
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 28px;
  align-items: center;
  color: white;
  background: var(--ink);
  border-radius: 14px;
}

.takeaway span { color: #a9bdff; font-size: 9px; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.takeaway strong { font-family: var(--serif); font-size: 21px; line-height: 1.48; }

.dark-section,
.score-section {
  color: white;
  background: var(--dark);
}

.light-heading .section-number { color: var(--dark); background: #a9bdff; }
.light-heading .kicker,
.light-heading > p { color: #aeb7c9; }
.light-heading h2 { color: white; }

.steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line-dark); }
.steps li { min-height: 118px; padding: 24px 0; display: grid; grid-template-columns: 65px 1fr 190px; gap: 26px; align-items: center; border-bottom: 1px solid var(--line-dark); }
.steps li > span { color: #92aaff; font-family: var(--serif); font-size: 32px; }
.steps li div strong { font-family: var(--serif); font-size: 22px; }
.steps li div p { margin: 5px 0 0; color: #aeb7c9; font-size: 14px; }
.steps li > code { padding: 10px 12px; color: #dce4ff; background: rgba(255, 255, 255, 0.06); border: 1px solid var(--line-dark); border-radius: 8px; font-size: 11px; text-align: center; }

.shuffle-demo {
  display: grid;
  grid-template-columns: 1fr 110px 1fr;
  align-items: center;
}

.shuffle-demo article { padding: 28px; background: var(--white); border: 1px solid var(--line); border-radius: 16px; }
.shuffle-demo .corrupt-card { background: var(--orange-soft); border-color: rgba(216, 95, 56, 0.25); }
.demo-label { display: block; margin-bottom: 15px; font-size: 9px; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.clean-label { color: var(--green); }
.corrupt-label { color: var(--orange); }
.data-row { min-height: 50px; padding: 9px 12px; display: grid; grid-template-columns: 1fr 28px 50px; align-items: center; border-bottom: 1px solid var(--line); }
.data-row:last-child { border-bottom: 0; }
.data-row code { font-size: 13px; }
.data-row i { color: var(--ink-soft); font-style: normal; }
.data-row strong { color: var(--blue); font-family: var(--mono); }
.corrupt-card .data-row strong { color: var(--orange); }
.shuffle-icon { display: flex; flex-direction: column; align-items: center; color: var(--orange); font-family: var(--serif); font-size: 42px; }
.shuffle-icon span { color: var(--ink-soft); font: 750 9px var(--sans); letter-spacing: 0.1em; text-transform: uppercase; }

.shuffle-facts { margin-top: 23px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.shuffle-facts article { padding: 21px; background: rgba(255, 253, 248, 0.58); border: 1px solid var(--line); border-radius: 11px; }
.shuffle-facts strong { color: var(--blue); font-family: var(--serif); font-size: 22px; }
.shuffle-facts p { margin: 8px 0 0; color: var(--ink-soft); font-size: 12px; line-height: 1.55; }

.plain-verdict { margin-top: 31px; padding: 26px 30px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 13px; background: var(--white); border-left: 5px solid var(--orange); box-shadow: var(--shadow); }
.plain-verdict > span:first-child { color: var(--ink-soft); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; }
.plain-verdict strong { font-family: var(--serif); font-size: 23px; }
.plain-verdict .not-this { width: 100%; color: var(--red); font-size: 13px; }

.worlds-section { background: var(--paper-deep); }
.world-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 17px; }
.world-card { position: relative; min-height: 290px; padding: 31px; display: flex; flex-direction: column; background: var(--white); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
.world-card::after { content: ""; position: absolute; right: -38px; bottom: -42px; width: 150px; height: 150px; border: 27px solid currentColor; border-radius: 50%; opacity: 0.055; }
.world-card > span { color: var(--ink-soft); font-size: 9px; font-weight: 850; letter-spacing: 0.13em; text-transform: uppercase; }
.world-card h3 { margin: 13px 0 0; color: var(--blue); font-family: var(--serif); font-size: 34px; font-weight: 550; }
.world-card .world-change { margin: 17px 0 0; color: var(--ink-soft); font-size: 14px; }
.world-card > strong { margin-top: auto; padding-top: 28px; max-width: 430px; font-family: var(--serif); font-size: 19px; line-height: 1.5; }
.world-card.no-heterogeneity { color: var(--green); }
.world-card.weak { color: var(--violet); }
.world-card.narrow { color: var(--orange); }
.world-card.no-heterogeneity h3 { color: var(--green); }
.world-card.weak h3 { color: var(--violet); }
.world-card.narrow h3 { color: var(--orange); }

.primary-duel { padding: 7px; display: grid; grid-template-columns: 1fr 150px 1fr; align-items: stretch; background: var(--ink); border-radius: 20px; }
.primary-duel article { padding: 30px; color: var(--ink); background: var(--white); border-radius: 15px; }
.primary-duel article > span { color: var(--ink-soft); font-size: 9px; font-weight: 850; letter-spacing: 0.13em; text-transform: uppercase; }
.primary-duel h3 { margin: 8px 0 3px; color: var(--blue); font-family: var(--serif); font-size: 29px; }
.primary-duel article > strong { font: 750 11px var(--mono); }
.primary-duel article > p { margin: 18px 0 0; color: var(--ink-soft); font-size: 13px; }
.versus { display: flex; flex-direction: column; align-items: center; justify-content: center; color: white; font-family: var(--serif); font-size: 31px; }
.versus span { color: #a9bdff; font: 850 8px var(--sans); letter-spacing: 0.12em; text-transform: uppercase; }
.versus small { margin-top: 8px; color: #aeb7c9; font: 650 8px var(--sans); }

.model-groups { margin-top: 18px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.model-groups article { padding: 24px; background: rgba(255, 253, 248, 0.66); border: 1px solid var(--line); border-radius: 12px; }
.model-groups article > span { display: block; margin-bottom: 14px; color: var(--ink-soft); font-size: 9px; font-weight: 850; letter-spacing: 0.11em; text-transform: uppercase; }
.model-groups article > strong { display: block; font-family: var(--serif); font-size: 17px; }
.model-groups article > p { margin: 14px 0 0; color: var(--ink-soft); font-size: 12px; }
.primary-freeze { margin-top: 18px; padding: 19px 23px; display: flex; align-items: center; gap: 20px; color: #44320f; background: var(--amber-soft); border: 1px solid rgba(182, 122, 24, 0.22); border-radius: 11px; }
.primary-freeze span { flex: 0 0 auto; padding: 3px 8px; color: white; background: var(--amber); border-radius: 999px; font-size: 9px; font-weight: 850; }
.primary-freeze strong { font-size: 13px; }

.score-layout { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 18px; }
.score-plain,
.score-technical { padding: 33px; border: 1px solid var(--line-dark); border-radius: 16px; }
.score-plain { background: rgba(255, 255, 255, 0.07); }
.score-plain > span,
.formula-label { color: #a9bdff; font-size: 9px; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.score-plain > strong { display: block; margin-top: 14px; font-family: var(--serif); font-size: 22px; line-height: 1.55; }
.score-counts { margin-top: 28px; padding-top: 24px; display: flex; align-items: center; justify-content: space-between; gap: 11px; border-top: 1px solid var(--line-dark); }
.score-counts div { text-align: center; }
.score-counts strong { display: block; color: #a9bdff; font-family: var(--serif); font-size: 29px; }
.score-counts span { display: block; color: #aeb7c9; font-size: 8px; font-weight: 760; letter-spacing: 0.08em; text-transform: uppercase; }
.score-counts i { color: #7e899f; font-style: normal; }
.score-technical { background: rgba(255, 255, 255, 0.025); }
.score-technical .formula { margin: 7px 0; overflow-x: auto; color: #dce4ff; font-size: 17px; }
.score-technical > p:not(.formula-label) { color: #aeb7c9; font-size: 12px; }
.score-technical ol { margin: 20px 0 0; padding-left: 22px; }
.score-technical li { padding: 6px 0; color: #d4d9e3; font-size: 13px; }
.secondary-details { margin-top: 15px; padding: 17px 21px; border: 1px solid var(--line-dark); border-radius: 11px; background: rgba(255, 255, 255, 0.035); }
.secondary-details summary { cursor: pointer; color: #dce4ff; font-size: 12px; font-weight: 760; }
.secondary-details p { margin: 14px 0 0; color: #aeb7c9; font-size: 13px; }

.evidence-timeline { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; list-style: none; }
.evidence-timeline li { position: relative; min-height: 280px; padding: 29px; background: var(--white); border: 1px solid var(--line); border-radius: 16px; }
.timeline-dot { width: 11px; height: 11px; margin-bottom: 24px; background: var(--green); border: 3px solid white; border-radius: 50%; box-shadow: 0 0 0 4px var(--green-soft); }
.evidence-timeline .warning .timeline-dot { background: var(--amber); box-shadow: 0 0 0 4px var(--amber-soft); }
.evidence-timeline .not-confirmed .timeline-dot { background: var(--red); box-shadow: 0 0 0 4px rgba(179, 62, 56, 0.12); }
.evidence-timeline li > span { color: var(--ink-soft); font-size: 9px; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.evidence-timeline h3 { margin: 8px 0 3px; font-family: var(--serif); font-size: 25px; }
.evidence-timeline li > strong { color: var(--green); font: 760 11px var(--mono); }
.evidence-timeline .warning > strong { color: var(--amber); }
.evidence-timeline .not-confirmed > strong { color: var(--red); }
.evidence-timeline p { margin: 18px 0 0; color: var(--ink-soft); font-size: 13px; }

.formal-result { margin-top: 24px; overflow: hidden; background: #f8f8fb; border: 1px solid rgba(179, 62, 56, 0.22); border-radius: 17px; box-shadow: 0 18px 55px rgba(27, 36, 54, 0.07); }
.formal-result header { padding: 27px 29px; display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; background: var(--white); border-bottom: 1px solid rgba(179, 62, 56, 0.18); }
.formal-result header > div { display: grid; gap: 7px; }
.formal-result header span { color: var(--red); font-size: 9px; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.formal-result header strong { font-family: var(--serif); font-size: 24px; }
.formal-result header strong code { color: var(--red); font: 760 0.78em var(--mono); }
.formal-result header p { margin: 0; color: var(--ink-soft); font: 700 10px var(--mono); }
.formal-result-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.formal-result-grid > div { min-height: 190px; padding: 25px; border-right: 1px solid var(--line); }
.formal-result-grid > div:last-child { border-right: 0; }
.formal-result-grid strong { display: block; color: var(--red); font-family: var(--serif); font-size: 27px; }
.formal-result-grid span { display: block; min-height: 30px; margin-top: 5px; font-size: 10px; font-weight: 760; }
.formal-result-grid p { margin: 14px 0 0; color: var(--ink-soft); font-size: 12px; }
.formal-result-grid .guardrail-pass strong { color: var(--green); }
.gate-summary { padding: 16px 29px; display: flex; flex-wrap: wrap; gap: 8px; border-top: 1px solid var(--line); background: var(--white); }
.gate-summary span { padding: 7px 10px; border-radius: 999px; font: 760 9px var(--mono); }
.gate-fail { color: #8e322d; background: rgba(179, 62, 56, 0.1); }
.gate-pass { color: #176948; background: var(--green-soft); }
.formal-result footer { padding: 21px 29px; color: #4e5060; background: #eef0f6; font-size: 13px; }

.development-result { margin-top: 24px; overflow: hidden; background: var(--amber-soft); border: 1px solid rgba(182, 122, 24, 0.22); border-radius: 17px; }
.development-result header { padding: 25px 29px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-bottom: 1px solid rgba(182, 122, 24, 0.22); }
.development-result header span { color: var(--amber); font-size: 9px; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.development-result header strong { font-family: var(--serif); font-size: 23px; }
.result-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.result-grid > div { min-height: 180px; padding: 25px; border-right: 1px solid rgba(182, 122, 24, 0.22); }
.result-grid > div:last-child { border-right: 0; }
.result-grid strong { display: block; color: #86590d; font-family: var(--serif); font-size: 27px; }
.result-grid span { display: block; margin-top: 5px; font-size: 10px; font-weight: 760; }
.result-grid p { margin: 14px 0 0; color: #6e6044; font-size: 12px; }
.development-result footer { padding: 20px 29px; color: #5a4b2f; background: rgba(255, 255, 255, 0.38); font-size: 13px; }

.boundary-section { background: #e8eaf1; }
.can-cannot { display: grid; grid-template-columns: 1fr 1fr; gap: 17px; }
.can-cannot article { padding: 31px; background: var(--white); border: 1px solid var(--line); border-radius: 16px; }
.can-cannot header { display: flex; align-items: center; gap: 12px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.can-cannot header span { width: 30px; height: 30px; display: grid; place-items: center; color: white; background: var(--green); border-radius: 50%; font-size: 18px; }
.can-cannot .cannot header span { background: var(--red); }
.can-cannot header strong { font-family: var(--serif); font-size: 23px; }
.can-cannot ul { margin: 22px 0 0; padding: 0; list-style: none; }
.can-cannot li { position: relative; padding: 10px 0 10px 23px; border-bottom: 1px solid var(--line); color: var(--ink-soft); font-size: 13px; }
.can-cannot li:last-child { border-bottom: 0; }
.can-cannot li::before { content: "•"; position: absolute; left: 6px; color: var(--green); }
.can-cannot .cannot li::before { color: var(--red); }

.faq { margin-top: 24px; padding: 31px; background: var(--white); border: 1px solid var(--line); border-radius: 16px; }
.faq h3 { margin: 0 0 18px; font-family: var(--serif); font-size: 27px; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { padding: 16px 4px; cursor: pointer; font-size: 14px; font-weight: 760; }
.faq details p { margin: -3px 4px 17px; color: var(--ink-soft); font-size: 13px; }

.next-proof { margin-top: 24px; padding: 30px; display: grid; grid-template-columns: 190px 1fr; align-items: center; gap: 28px; color: white; background: var(--ink); border-radius: 15px; }
.next-proof span { color: #a9bdff; font-size: 9px; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.next-proof strong { font-family: var(--serif); font-size: 20px; line-height: 1.5; }
.k1-design-cta { text-decoration: none; transition: transform 0.18s ease, background 0.18s ease; }
.k1-design-cta:hover { transform: translateY(-2px); background: #19243b; }

.site-footer { color: #c3cad8; background: #0c1322; }
.footer-inner { min-height: 190px; padding-block: 45px; display: flex; align-items: center; justify-content: space-between; gap: 35px; }
.footer-inner > div strong { color: white; font-family: var(--serif); font-size: 18px; }
.footer-inner > div p { max-width: 520px; margin: 8px 0 0; color: #7f899e; font-size: 11px; }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px 18px; }
.site-footer nav a { color: #c3cad8; font-size: 11px; text-underline-offset: 4px; }

@media (max-width: 1080px) {
  .hero { grid-template-columns: 1fr; gap: 48px; }
  .hero-copy { max-width: 850px; }
  .hero-figure { width: min(720px, 100%); margin-inline: auto; }
  .numbers { grid-template-columns: repeat(3, 1fr); }
  .numbers > div:nth-child(4) { border-left: 1px solid rgba(255, 255, 255, 0.11); }
  .section-heading { grid-template-columns: 90px 1fr; }
  .section-heading > p { grid-column: 2; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .result-grid > div:nth-child(2) { border-right: 0; }
  .result-grid > div:nth-child(-n + 2) { border-bottom: 1px solid rgba(182, 122, 24, 0.22); }
  .formal-result-grid { grid-template-columns: 1fr 1fr; }
  .formal-result-grid > div:nth-child(2) { border-right: 0; }
  .formal-result-grid > div:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 800px) {
  body { font-size: 16px; }
  .wrap { width: min(100% - 34px, 1160px); }
  .topbar-inner { width: min(100% - 26px, 1240px); }
  .topbar-inner { align-items: flex-start; flex-direction: column; gap: 8px; padding-block: 10px; }
  .topbar nav { width: 100%; padding-bottom: 2px; gap: 18px; }
  html { scroll-padding-top: 116px; }
  .hero { min-height: 0; padding-block: 68px 76px; }
  .hero h1 { font-size: clamp(46px, 11.5vw, 68px); }
  .hero-deck { font-size: 17px; }
  .section { padding-block: 82px; }
  .drawers { grid-template-columns: 1fr; gap: 12px; }
  .drawer-arrow { min-height: 65px; flex-direction: row; gap: 10px; transform: rotate(90deg); }
  .drawer-arrow span { writing-mode: initial; transform: rotate(-90deg); }
  .takeaway { grid-template-columns: 1fr; gap: 10px; }
  .steps li { grid-template-columns: 50px 1fr; }
  .steps li > code { grid-column: 2; justify-self: start; }
  .shuffle-demo { grid-template-columns: 1fr; gap: 10px; }
  .shuffle-icon { min-height: 70px; transform: rotate(90deg); justify-content: center; }
  .shuffle-icon span { transform: rotate(-90deg); }
  .shuffle-facts { grid-template-columns: 1fr 1fr; }
  .world-grid { grid-template-columns: 1fr; }
  .primary-duel { grid-template-columns: 1fr; }
  .versus { min-height: 95px; }
  .model-groups { grid-template-columns: 1fr; }
  .score-layout { grid-template-columns: 1fr; }
  .evidence-timeline { grid-template-columns: 1fr; }
  .evidence-timeline li { min-height: 0; }
  .can-cannot { grid-template-columns: 1fr; }
  .next-proof { grid-template-columns: 1fr; gap: 10px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .site-footer nav { justify-content: flex-start; }
}

@media (max-width: 520px) {
  .wrap { width: min(100% - 28px, 1160px); }
  .hero { padding-top: 56px; }
  .hero h1 { font-size: clamp(42px, 13vw, 58px); }
  .boundary-banner { grid-template-columns: 1fr; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .text-link { margin: 7px 0 0; text-align: center; }
  .hero-figure { padding: 22px 12px 17px; }
  .hero-figure figcaption { padding-inline: 8px; }
  .hero-figure figcaption strong { font-size: 18px; }
  .legend { gap: 6px 11px; font-size: 8px; }
  .numbers { grid-template-columns: 1fr 1fr; }
  .numbers > div { min-height: 105px; }
  .numbers > div:nth-child(odd) { border-left: 1px solid rgba(255, 255, 255, 0.11); }
  .section-heading { grid-template-columns: 1fr; gap: 14px; }
  .section-heading > p { grid-column: auto; }
  .section-heading h2 { font-size: clamp(36px, 11vw, 48px); }
  .drawer { padding: 24px 19px; }
  .drawer header { align-items: flex-start; flex-direction: column; gap: 4px; }
  .drawer dl > div { grid-template-columns: 1fr; gap: 3px; }
  .drawer dd code { font-size: 10px; }
  .takeaway { padding: 23px 20px; }
  .takeaway strong { font-size: 18px; }
  .steps li { grid-template-columns: 42px 1fr; gap: 13px; }
  .steps li > span { font-size: 26px; }
  .steps li div strong { font-size: 19px; }
  .shuffle-demo article { padding: 22px 17px; }
  .shuffle-facts { grid-template-columns: 1fr; }
  .plain-verdict { padding: 23px 20px; }
  .world-card { min-height: 260px; padding: 25px 21px; }
  .primary-duel article { padding: 24px 20px; }
  .primary-freeze { align-items: flex-start; flex-direction: column; gap: 9px; }
  .score-plain,
  .score-technical { padding: 25px 20px; }
  .score-counts { align-items: stretch; flex-direction: column; }
  .score-counts i { transform: rotate(90deg); text-align: center; }
  .development-result header { align-items: flex-start; flex-direction: column; }
  .formal-result header { align-items: flex-start; flex-direction: column; }
  .formal-result-grid { grid-template-columns: 1fr; }
  .formal-result-grid > div { min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .formal-result-grid > div:last-child { border-bottom: 0; }
  .result-grid { grid-template-columns: 1fr; }
  .result-grid > div { min-height: 0; border-right: 0; border-bottom: 1px solid rgba(182, 122, 24, 0.22); }
  .result-grid > div:last-child { border-bottom: 0; }
  .can-cannot article,
  .faq { padding: 25px 20px; }
  .next-proof { padding: 25px 21px; }
}

/* LEARNING-DISCOSCM-EXPERIMENT-READING-2026-07-17-V1 */
.experiment-identity {
  display: grid;
  width: max-content;
  max-width: 100%;
  margin: 14px 0 22px;
  padding: 9px 12px;
  border: 1px solid #c99d53;
  border-radius: 10px;
  background: #fff6df;
}
.experiment-identity span {
  color: #7b4b00;
  font-size: 9px;
  font-weight: 850;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.experiment-identity strong {
  margin-top: 2px;
  color: #6c4000;
  font-size: 14px;
}
.related-proof {
  display: grid;
  grid-template-columns: 190px 280px minmax(0, 1fr);
  align-items: center;
  gap: 24px;
  margin-top: 14px;
  padding: 23px 26px;
  border: 1px solid #aeb9c8;
  border-radius: 15px;
  background: #f7f8fb;
  color: var(--ink);
  text-decoration: none;
  transition: border-color .18s ease, transform .18s ease;
}
.related-proof:hover {
  transform: translateY(-2px);
  border-color: #4269e1;
}
.related-proof span {
  color: #4269e1;
  font-size: 9px;
  font-weight: 850;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.related-proof strong {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.35;
}
.related-proof p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.65;
}
@media (max-width: 900px) {
  .related-proof { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 560px) {
  .experiment-identity { width: 100%; }
  .related-proof { padding: 21px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .related-proof { transition: none; }
}