/* ==========================================================================
   Interview · long-scroll report
   ========================================================================== */

:root {
  --brand: #0c4ca0;
  --brand-ink: #0a3d82;
  --brand-deep: #061a3a;
  --brand-50: #f3f7fd;
  --brand-100: #e4edf9;
  --brand-200: #c9daf3;
  --accent: #c0262d;

  --ink: #0e1a2b;
  --text: #2c3849;
  --muted: #687588;
  --faint: #9aa5b4;
  --line: #e4e9f0;
  --line-strong: #cbd3de;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;

  --radius: 16px;
  --shadow: 0 1px 2px rgba(14, 26, 43, 0.04), 0 12px 32px -18px rgba(14, 26, 43, 0.18);
  --nav-h: 60px;
  --wrap: 1360px;
  --font: "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans CJK SC", "Source Han Sans SC", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  text-autospace: normal;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  color: var(--ink);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
}

a {
  color: inherit;
}

sub, sup {
  font-size: 0.72em;
  line-height: 0;
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 48px;
}

.hl {
  color: var(--accent);
  font-weight: 600;
}

.mono {
  font-variant-numeric: tabular-nums;
}

/* ---------------------------------------------------------------- nav */

.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.86);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  box-shadow: 0 1px 0 var(--line);
  opacity: 0;
  transform: translateY(-100%);
  pointer-events: none;
  transition: transform 0.35s cubic-bezier(0.2, 0.7, 0.2, 1), opacity 0.35s;
}

.nav.solid {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.nav .wrap {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-links a {
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 14.5px;
  text-decoration: none;
  white-space: nowrap;
  opacity: 0.7;
  transition: opacity 0.2s, background-color 0.2s, color 0.2s;
}

.nav-links a b {
  margin-right: 6px;
  font-weight: 700;
  opacity: 0.55;
  font-variant-numeric: tabular-nums;
}

.nav-links a:hover {
  opacity: 1;
}

.nav-links a.active {
  opacity: 1;
  color: var(--brand-ink);
  background: var(--brand-100);
}

.progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--brand), #4a8cf0);
}

/* ---------------------------------------------------------------- hero */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(900px 560px at 88% 4%, rgba(84, 146, 255, 0.34), transparent 62%),
    radial-gradient(760px 520px at -6% 104%, rgba(22, 98, 204, 0.38), transparent 60%),
    linear-gradient(155deg, #04101f 0%, #082552 50%, #0c4ca0 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 42%, #000 20%, transparent 80%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 42%, #000 20%, transparent 80%);
}

.hero-inner {
  position: relative;
  padding-top: calc(var(--nav-h) + 72px);
  padding-bottom: 120px;
}

.logos {
  display: flex;
  gap: 14px;
  margin-bottom: 56px;
}

.logos span {
  width: 68px;
  height: 68px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
}

.logos img {
  width: 60px;
  height: 60px;
  object-fit: contain;
}

.hero h1 {
  color: #fff;
  font-size: clamp(72px, 11vw, 150px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.hero .rule {
  width: 72px;
  height: 3px;
  margin: 40px 0 0;
  border-radius: 2px;
  background: linear-gradient(90deg, #8fb8ff, rgba(143, 184, 255, 0));
}

.agenda {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 16px;
}

.agenda a {
  display: flex;
  flex-direction: column;
  padding: 24px 24px 26px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.055);
  text-decoration: none;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: transform 0.25s, background-color 0.25s, border-color 0.25s;
}

.agenda a:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.1);
}

.agenda .num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.5);
}

.agenda .venue {
  margin-top: 18px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #a7c8ff;
}

.agenda .t {
  margin-top: 6px;
  font-size: 21px;
  font-weight: 700;
  line-height: 1.35;
}

.agenda .s {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.62);
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  transform: translateX(-50%);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: rgba(255, 255, 255, 0.5);
}

.scroll-cue i {
  width: 1px;
  height: 40px;
  background: linear-gradient(rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0));
  animation: cue 2.2s ease-in-out infinite;
  transform-origin: top;
}

@keyframes cue {
  0% { transform: scaleY(0); opacity: 0; }
  40% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1) translateY(16px); opacity: 0; }
}

/* ---------------------------------------------------------------- part cover */

.part-cover {
  position: relative;
  overflow: hidden;
  padding: 150px 0 104px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(800px 420px at 100% 0%, rgba(12, 76, 160, 0.07), transparent 70%),
    var(--bg-soft);
}

.part-cover .big-num {
  position: absolute;
  top: 50%;
  right: -0.02em;
  transform: translateY(-54%);
  font-size: clamp(240px, 32vw, 460px);
  font-weight: 800;
  line-height: 0.8;
  letter-spacing: -0.06em;
  color: transparent;
  -webkit-text-stroke: 2px rgba(12, 76, 160, 0.1);
  pointer-events: none;
  user-select: none;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--brand-ink);
  background: var(--brand-100);
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}

.part-cover h2 {
  position: relative;
  margin-top: 24px;
  max-width: 980px;
  font-size: clamp(40px, 5.4vw, 72px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.part-cover .sub {
  position: relative;
  margin-top: 18px;
  font-size: clamp(18px, 1.8vw, 24px);
  color: var(--muted);
}

.stats {
  position: relative;
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  border-top: 1px solid var(--line-strong);
}

.stat {
  padding: 26px 32px 0 0;
}

.stat + .stat {
  padding-left: 32px;
  border-left: 1px solid var(--line);
}

.stat b {
  display: block;
  font-size: clamp(34px, 3.6vw, 50px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--brand);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.stat span {
  display: block;
  margin-top: 12px;
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------------------------------------------------------------- scene */

.scene {
  padding: 96px 0 104px;
}

.scene + .scene {
  border-top: 1px solid var(--line);
}

.scene-head {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 40px;
}

.scene-head .idx {
  flex: none;
  min-width: 52px;
  text-align: center;
  margin-top: 6px;
  padding: 3px 10px;
  border: 1px solid var(--brand-200);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--brand);
  background: var(--brand-50);
  font-variant-numeric: tabular-nums;
}

.kicker {
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--faint);
}

.scene-head h3 {
  font-size: clamp(28px, 2.8vw, 40px);
  font-weight: 700;
}

.scene-head h3 .hl {
  font-weight: inherit;
  color: var(--brand);
}

/* ---------------------------------------------------------------- layout */

.grid-2,
.grid-3,
.grid-4-8,
.grid-5-7,
.grid-7-5,
.grid-6-6 {
  display: grid;
  gap: 28px;
  align-items: start;
}

.grid-2,
.grid-6-6 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.grid-3.narrow-mid { grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr) minmax(0, 1fr); }
.grid-3.narrow-first { grid-template-columns: minmax(0, 0.78fr) minmax(0, 1fr) minmax(0, 1fr); }
.grid-5-7 { grid-template-columns: 5fr 7fr; }
.grid-4-8 { grid-template-columns: 4fr 8fr; }
.grid-7-5 { grid-template-columns: 7fr 5fr; }

.grid-2 > *,
.grid-4-8 > *,
.grid-5-7 > *,
.grid-7-5 > *,
.grid-6-6 > * {
  min-width: 0;
}

.stack {
  display: grid;
  gap: 22px;
}

.center {
  align-items: center;
}

.mt { margin-top: 32px; }

/* components that reset their own margin need the compound selector to keep .mt */
.fig.mt,
.table-card.mt,
.obs.mt,
.refs.mt { margin-top: 32px; }

/* ---------------------------------------------------------------- cards */

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.card {
  position: relative;
  padding: 34px 32px 36px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow);
}

.card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 32px;
  width: 44px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--brand);
}

.card.key {
  border-color: var(--brand-200);
  background: linear-gradient(180deg, var(--brand-50) 0%, #fff 70%);
}

.card .no {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--brand);
  font-variant-numeric: tabular-nums;
}

.card h4 {
  margin: 14px 0 16px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
}

.card p {
  font-size: 17.5px;
  line-height: 1.9;
}

/* ---------------------------------------------------------------- labels, figures, tables */

.label {
  position: relative;
  margin-bottom: 14px;
  padding-left: 14px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.label::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  width: 4px;
  height: 1.1em;
  border-radius: 2px;
  background: var(--accent);
}

.label .step-no {
  margin-right: 6px;
  color: var(--brand);
}

.panel {
  min-width: 0;
}

.fig,
.table-card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.fig {
  padding: 22px;
}

.fig img {
  margin: 0 auto;
  cursor: zoom-in;
}

.equal {
  align-items: stretch;
}

.equal > .fig {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.fig figcaption {
  margin-top: 14px;
  text-align: center;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.table-card {
  padding: 16px 20px 18px;
  overflow-x: auto;
}

.rt {
  width: 100%;
  border-collapse: collapse;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  font-size: 14.5px;
  line-height: 1.45;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.rt thead {
  border-bottom: 1.5px solid var(--ink);
}

.rt th,
.rt td {
  padding: 6px 10px;
  text-align: center;
  white-space: nowrap;
}

.rt thead th {
  padding-top: 9px;
  padding-bottom: 9px;
  font-weight: 700;
  color: var(--ink);
}

.rt th.span {
  position: relative;
}

.rt th.span::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 1px;
  background: var(--line-strong);
}

.rt .l {
  text-align: left;
}

.rt tbody + tbody {
  border-top: 1px solid var(--line-strong);
}

.rt tbody tr:first-child > * {
  padding-top: 9px;
}

.rt tbody tr:last-child > * {
  padding-bottom: 9px;
}

.rt tbody th.g {
  vertical-align: middle;
  font-weight: 600;
  color: var(--muted);
}

.rt strong {
  font-weight: 700;
  color: var(--brand-ink);
}

.rt tr.em > td {
  font-weight: 700;
  color: var(--brand-ink);
  background: var(--brand-50);
}

.rt .ns {
  font-weight: 400;
  color: var(--muted);
}

.rt tr.sec td {
  font-size: 13.5px;
  font-style: italic;
  color: var(--muted);
}

.compact .table-card {
  padding: 12px 14px 14px;
}

.compact .rt {
  font-size: 13px;
}

.compact .rt th,
.compact .rt td {
  padding-left: 6px;
  padding-right: 6px;
}

/* ---------------------------------------------------------------- takeaway / notes */

.takeaway {
  margin-top: 36px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: start;
  padding: 24px 30px;
  border: 1px solid var(--brand-100);
  border-radius: 16px;
  background: var(--brand-50);
}

.takeaway .tag {
  margin-top: 4px;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  white-space: nowrap;
  color: #fff;
  background: var(--brand);
}

.takeaway p {
  font-size: 18.5px;
  line-height: 1.9;
  color: var(--ink);
}

.note {
  padding: 28px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.note p,
.prose {
  font-size: 18px;
  line-height: 1.95;
}

.note p + p {
  margin-top: 12px;
}

.note h4 {
  margin-bottom: 10px;
  font-size: 19px;
}

.note h4:not(:first-child) {
  margin-top: 22px;
}

.note ol {
  margin: 0;
  padding-left: 1.4em;
}

.note li {
  font-size: 18px;
  line-height: 1.95;
}

.note li + li {
  margin-top: 8px;
}

/* ---------------------------------------------------------------- steps */

.steps {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(var(--n, 4), minmax(0, 1fr));
  counter-reset: step;
}

.step {
  position: relative;
  padding-right: 28px;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: relative;
  z-index: 1;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: var(--brand);
  box-shadow: 0 0 0 6px #fff;
}

.step::after {
  content: "";
  position: absolute;
  top: 18px;
  left: 36px;
  right: 0;
  height: 1px;
  background: var(--brand-200);
}

.step:last-child::after {
  display: none;
}

.step h5 {
  margin: 18px 0 8px;
  font-size: 18px;
  font-weight: 700;
}

.step p {
  font-size: 16.5px;
  line-height: 1.8;
}

.panel > .takeaway {
  margin-top: 22px;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 22px 26px;
}

.panel > .takeaway .tag {
  justify-self: start;
  margin-top: 0;
}

.panel > .takeaway p {
  font-size: 17.5px;
}

.label + .steps {
  margin-top: 20px;
}

/* ---------------------------------------------------------------- problem → solution flow */

.flow {
  display: grid;
  gap: 16px;
}

.flow-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 64px minmax(0, 1fr);
  align-items: stretch;
}

.flow-box {
  padding: 22px 26px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}

.flow-box.solution {
  border-color: var(--brand-200);
  background: var(--brand-50);
}

.flow-box .tag {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.flow-box.solution .tag {
  color: var(--brand);
}

.flow-box h4 {
  margin-top: 6px;
  font-size: 21px;
}

.flow-box p {
  margin-top: 6px;
  font-size: 16.5px;
  color: var(--muted);
}

.flow-box.rich p {
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}

.flow-arrow {
  display: grid;
  place-items: center;
  color: var(--brand);
}

.flow-arrow svg {
  width: 30px;
  height: 30px;
}

/* ---------------------------------------------------------------- stages (project framework) */

.stages {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 72px minmax(0, 1fr);
  align-items: stretch;
}

.stage {
  padding: 34px 34px 36px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow);
}

.stage .stage-no {
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--brand);
}

.stage h4 {
  margin-top: 8px;
  font-size: 26px;
}

.stage .pair {
  margin-top: 26px;
  display: grid;
  gap: 12px;
}

.stage .box {
  padding: 18px 22px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
}

.stage .box.solution {
  border-color: var(--brand-200);
  background: var(--brand-50);
}

.stage .box .tag {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.stage .box.solution .tag {
  color: var(--brand);
}

.stage .box ul {
  margin: 6px 0 0;
  padding-left: 1.1em;
}

.stage .box li {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.8;
}

.stage .down {
  display: grid;
  place-items: center;
  color: var(--brand);
}

.stage .down svg {
  width: 22px;
  height: 22px;
}

/* ---------------------------------------------------------------- observation list, phases, dims */

.obs {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.obs li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 14px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.obs .n {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
  color: var(--brand-ink);
  background: var(--brand-100);
}

.obs p {
  font-size: 17px;
  line-height: 1.85;
}

.phases {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.phase {
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.phase .range {
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--brand);
}

.phase p {
  margin-top: 6px;
  font-size: 17px;
  color: var(--ink);
}

.dims {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.dim {
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow);
}

.dim .no {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--brand);
}

.dim h5 {
  margin: 10px 0 8px;
  font-size: 19px;
}

.dim p {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------------------------------------------------------------- task table, case, formulas */

.task-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.55;
}

.task-table th {
  padding: 11px 14px;
  text-align: left;
  font-weight: 700;
  color: #fff;
  background: var(--brand);
}

.task-table th:first-child { border-top-left-radius: 10px; }
.task-table th:last-child { border-top-right-radius: 10px; }

.task-table td {
  padding: 10px 14px;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.task-table tbody tr:nth-child(even) td {
  background: var(--bg-soft);
}

.task-table td:first-child {
  font-weight: 600;
  color: var(--ink);
}

.task-table td small {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
}

.metric-table td:first-child,
.metric-table td:last-child {
  white-space: nowrap;
}

.case {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.7;
}

.case th {
  width: 96px;
  padding: 11px 14px;
  vertical-align: top;
  text-align: left;
  color: var(--ink);
  background: var(--bg-soft);
}

.case td {
  padding: 11px 16px;
}

.case tr + tr > * {
  border-top: 1px solid var(--line);
}

.formulas {
  display: grid;
  gap: 12px;
}

.formula {
  padding: 14px 20px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-soft);
}

math {
  font-family: "STIX Two Math", "Cambria Math", "Latin Modern Math", math;
  font-size: 1.12em;
}

/* ---------------------------------------------------------------- evidence rows (project results) */

.evidence {
  display: grid;
  gap: 20px;
}

.evidence-row {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 28px;
  align-items: center;
}

.claim {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 14px;
}

.claim .n {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: var(--brand);
}

.claim p {
  font-size: 18px;
  line-height: 1.9;
  color: var(--ink);
}

/* ---------------------------------------------------------------- grades, governance */

.grade {
  display: inline-block;
  margin-top: 8px;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.grade.g1 {
  color: #fff;
  background: var(--accent);
}

.grade.g2 {
  color: var(--accent);
  background: #fbe9ea;
}

.grade.ok {
  color: var(--brand-ink);
  background: var(--brand-100);
}

.gov {
  display: grid;
  gap: 14px;
}

.gov-item {
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.gov-item.issue {
  border-color: #f1cfd1;
  background: #fdf6f6;
}

.gov-item .tag {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--brand);
}

.gov-item.issue .tag {
  color: var(--accent);
}

.gov-item p {
  margin-top: 6px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
}

.cls-table td:first-child {
  width: 200px;
}

.cls-table td:nth-child(2) {
  width: 24%;
}

.examples {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
}

.ex {
  margin: 0;
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  align-items: start;
}

.ex-media {
  position: relative;
  width: 84px;
  height: 112px;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: 10px;
  background: var(--ink);
  cursor: pointer;
  box-shadow: 0 6px 16px -8px rgba(14, 26, 43, 0.55);
}

.ex-media video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.ex-media::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 32px;
  height: 32px;
  margin: -16px 0 0 -16px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.94) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'><path d='M3.5 1.8v8.4l7-4.2z' fill='%230c4ca0'/></svg>") center / 13px no-repeat;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  transition: transform 0.2s;
}

.ex-media:hover::after,
.ex-media:focus-visible::after {
  transform: scale(1.12);
}

.ex figcaption {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.ex.no-media {
  grid-template-columns: 1fr;
}

.ex.no-media .ex-media {
  display: none;
}

/* ---------------------------------------------------------------- model cards */

.models {
  display: grid;
  gap: 22px;
}

.model {
  padding: 26px 30px 28px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow);
}

.model-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.model-head .no {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--brand);
}

.model-head h4 {
  font-size: 21px;
}

.chip {
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand-ink);
  background: var(--brand-100);
}

.model .fig {
  padding: 6px 10px;
  box-shadow: none;
}

.model .fig img.scale-down {
  max-width: 76%;
}

.spec {
  margin: 18px 0 0;
  display: grid;
  grid-template-columns: 1.3fr 1.2fr 1.2fr 0.8fr;
  gap: 20px;
}

.spec > div {
  padding-top: 12px;
  border-top: 2px solid var(--brand-100);
}

.spec dt {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--brand);
}

.spec dd {
  margin: 6px 0 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------------------------------------------------------------- method cards, vertical steps, definitions */

.method {
  padding: 30px 32px 32px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow);
}

.method h4 {
  font-size: 22px;
}

.method .part {
  margin-top: 18px;
}

.method .part + .part {
  padding-top: 18px;
  border-top: 1px dashed var(--line-strong);
}

.method .k {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--brand);
}

.method .why .k {
  color: var(--muted);
}

.method .part p {
  margin-top: 6px;
  font-size: 17px;
  line-height: 1.85;
}

.vsteps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
  counter-reset: vs;
}

.vsteps > li {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 18px;
  padding: 24px 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}

.vsteps > li::before {
  counter-increment: vs;
  content: counter(vs);
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: var(--brand);
}

.vsteps h5 {
  margin-bottom: 8px;
  font-size: 18.5px;
}

.vsteps p {
  font-size: 16.5px;
  line-height: 1.85;
}

.vsteps p + p {
  margin-top: 8px;
}

.defs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.def {
  padding: 24px 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}

.def h4 {
  margin-bottom: 8px;
  font-size: 19px;
}

.def p {
  font-size: 16.5px;
  line-height: 1.85;
}

.envr {
  padding: 26px 30px;
  border: 1px solid var(--brand-100);
  border-radius: 16px;
  background: var(--brand-50);
}

.envr .eq {
  font-size: 21px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--brand-ink);
}

.envr p {
  margin-top: 8px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}

.fineprint {
  margin-top: 14px;
  font-size: 14px;
  color: var(--muted);
}

/* ---------------------------------------------------------------- line chart */

.chart {
  display: block;
  width: 100%;
  height: auto;
}

.chart .grid {
  stroke: var(--line);
  stroke-width: 1;
}

.chart .axis {
  stroke: var(--line-strong);
  stroke-width: 1;
}

.chart .tick {
  font-size: 12px;
  fill: var(--muted);
  font-variant-numeric: tabular-nums;
}

.chart .axis-title {
  font-size: 12.5px;
  fill: var(--muted);
}

.fig + .label {
  margin-top: 22px;
}

.src-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--brand);
  text-decoration: none;
  border-bottom: 1px solid var(--brand-200);
}

.src-link:hover {
  border-bottom-color: var(--brand);
}

.refs {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 28px;
}

.refs-title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink);
}

.refs .src-link {
  margin-top: 0;
}

/* ---------------------------------------------------------------- synthesis cases */

.synth {
  display: grid;
  gap: 18px;
}

.synth-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.synth-head .chip {
  flex: none;
}

.synth-head p {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text);
}

.synth-head:not(:first-child) {
  margin-top: 8px;
  padding-top: 24px;
  border-top: 1px dashed var(--line-strong);
}

.synth-pairs {
  display: grid;
  grid-template-columns: 64px repeat(4, minmax(0, 1fr));
  gap: 16px;
}

/* the two halves line up with the original / synthesized rows of each case image */
.synth-rows {
  display: grid;
  grid-template-rows: 1fr 1fr;
}

.synth-rows span {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink);
}

.synth-rows .grade {
  margin-top: 6px;
  font-style: normal;
}

.synth img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------------------------------------------------------------- footer */

.footer {
  padding: 72px 0;
  color: rgba(255, 255, 255, 0.66);
  background: linear-gradient(160deg, #04101f, #082552);
}

.footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer .logos {
  margin: 0;
}

.footer .logos span {
  width: 52px;
  height: 52px;
}

.footer .logos img {
  width: 46px;
  height: 46px;
}

.footer .brand {
  color: #fff;
  font-size: 22px;
}

.to-top {
  padding: 10px 18px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  font-size: 14px;
  text-decoration: none;
  color: #fff;
  transition: background-color 0.2s;
}

.to-top:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ---------------------------------------------------------------- lightbox */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  place-items: center;
  padding: 4vh 4vw;
  background: rgba(5, 12, 24, 0.88);
  cursor: zoom-out;
}

.lightbox.open {
  display: grid;
}

.lightbox img {
  max-width: 100%;
  max-height: 92vh;
  padding: 14px;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.lightbox video,
.lightbox .lb-cap {
  display: none;
}

.lightbox.is-video {
  align-content: center;
  gap: 16px;
}

.lightbox.is-video img {
  display: none;
}

.lightbox.is-video video {
  display: block;
  width: auto;
  height: 80vh;
  max-width: 92vw;
  border-radius: 12px;
  background: #000;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  cursor: auto;
}

.lightbox.is-video .lb-cap {
  display: block;
  max-width: 80vw;
  font-size: 16px;
  line-height: 1.7;
  text-align: center;
  color: rgba(255, 255, 255, 0.86);
}

/* ---------------------------------------------------------------- reveal */

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.8s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: var(--d, 0s);
}

.js .reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .scroll-cue i { animation: none; }
}

/* ---------------------------------------------------------------- responsive */

@media (max-width: 1180px) {
  .wrap { padding-left: 32px; padding-right: 32px; }
  .nav-links a span { display: none; }
  .agenda,
  .dims { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3,
  .grid-3.narrow-mid,
  .grid-3.narrow-first { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-2,
  .grid-4-8,
  .grid-5-7,
  .grid-7-5,
  .grid-6-6,
  .evidence-row { grid-template-columns: 1fr; }
  .spec { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  body { font-size: 16.5px; }
  .wrap { padding-left: 20px; padding-right: 20px; }
  .nav-links { display: none; }
  .cards,
  .grid-2,
  .grid-3,
  .grid-3.narrow-mid,
  .grid-3.narrow-first,
  .phases,
  .agenda,
  .dims { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 20px; }
  .step::after { display: none; }
  .flow-row,
  .stages,
  .spec,
  .defs { grid-template-columns: 1fr; }
  .cls-table td:first-child,
  .cls-table td:nth-child(2) { width: auto; }
  .model .fig img.scale-down { max-width: 100%; }
  .synth-pairs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .synth-rows { display: none; }
  .metric-table td:first-child,
  .metric-table td:last-child { white-space: normal; }
  .flow-arrow,
  .stages > .flow-arrow { transform: rotate(90deg); padding: 8px 0; }
  .scene { padding: 80px 0; }
  .part-cover { padding: 110px 0 80px; }
  .stat + .stat { padding-left: 0; border-left: 0; }
  .takeaway { grid-template-columns: 1fr; padding: 22px; }
  .footer .wrap { flex-direction: column; }
}

/* ---------------------------------------------------------------- print */

@media print {
  @page { size: A4 landscape; margin: 12mm; }
  html { scroll-behavior: auto; }
  body { font-size: 14px; }
  .nav,
  .scroll-cue,
  .lightbox,
  .to-top { display: none !important; }
  .js .reveal { opacity: 1 !important; transform: none !important; }
  .hero,
  .part-cover,
  .footer,
  .takeaway,
  .rt tr.em > td,
  .task-table th {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  .hero { min-height: auto; }
  .part-cover { break-before: page; }
  .fig,
  .table-card,
  .card,
  .takeaway { break-inside: avoid; box-shadow: none; }
}