:root {
  --brand-blue: #2aa5d6;
  --brand-blue-deep: #087cab;
  --brand-yellow: #f3b600;
  --brand-red: #ed1426;
  --ink: #111820;
  --ink-soft: #33414b;
  --paper: #ffffff;
  --paper-blue: #f3fbfe;
  --paper-warm: #fffaf0;
  --line: #dce8ee;
  --max-copy: 42rem;
  --max-shell: 72rem;
  --radius: 1.45rem;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 18px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

.insodi {
  width: 100%;
  overflow: clip;
  background:
    linear-gradient(90deg, rgba(42,165,214,.035) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--paper);
}

.insodi-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 4px;
  background: rgba(17,24,32,.08);
  z-index: 100;
}

.insodi-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--brand-blue) 0 52%,
    var(--brand-yellow) 52% 82%,
    var(--brand-red) 82% 100%
  );
  transform-origin: left;
}

.insodi-chapter {
  position: fixed;
  top: .85rem;
  left: .75rem;
  right: .75rem;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .75rem;
  padding: .58rem .72rem;
  border: 1px solid rgba(17,24,32,.08);
  border-radius: 999px;
  background: rgba(255,255,255,.88);
  box-shadow: 0 8px 30px rgba(0,0,0,.055);
  backdrop-filter: blur(16px);
  font-size: .63rem;
  line-height: 1;
  letter-spacing: .11em;
  font-weight: 800;
  text-transform: uppercase;
}

.insodi-chapter__project { color: var(--ink); }

.insodi-section {
  position: relative;
  padding: 6.5rem 1.15rem 5.5rem;
}

.insodi-shell {
  width: min(100%, var(--max-shell));
  margin-inline: auto;
}

.insodi-paper {
  background:
    radial-gradient(circle at 100% 0%, rgba(42,165,214,.09), transparent 19rem),
    #fff;
}

.insodi-cover {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding-top: 7rem;
  padding-bottom: 6rem;
  background:
    radial-gradient(circle at 100% 10%, rgba(243,182,0,.18), transparent 23rem),
    radial-gradient(circle at -10% 65%, rgba(42,165,214,.18), transparent 25rem),
    #fff;
  isolation: isolate;
}

.insodi-cover::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 18px;
  background: linear-gradient(
    90deg,
    var(--brand-blue) 0 52%,
    var(--brand-yellow) 52% 82%,
    var(--brand-red) 82% 100%
  );
}

.insodi-cover__content {
  position: relative;
  z-index: 3;
  width: min(100%, 56rem);
  text-align: left;
}

.insodi-logo-wrap {
  width: min(13rem, 62vw);
  min-height: 4rem;
  margin-bottom: 2.4rem;
}

.insodi-logo {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.insodi-kicker,
.insodi-card-label {
  margin: 0;
  font-size: .72rem;
  line-height: 1.35;
  font-weight: 900;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.insodi-kicker {
  margin-bottom: 1rem;
  color: var(--brand-blue-deep);
}

.insodi-cover h1 {
  margin: 0;
  max-width: 8ch;
  font-size: clamp(4.1rem, 21vw, 8.5rem);
  line-height: .82;
  letter-spacing: -.075em;
  font-weight: 950;
  text-wrap: balance;
}

.insodi-cover h1 span {
  position: relative;
  display: inline-block;
  color: var(--brand-blue-deep);
}

.insodi-cover h1 span::after {
  content: "";
  position: absolute;
  left: .02em;
  right: -.05em;
  bottom: -.03em;
  height: .13em;
  border-radius: 999px;
  background: var(--brand-yellow);
  transform: rotate(-1.5deg);
  z-index: -1;
}

.insodi-cover__subtitle {
  max-width: 31rem;
  margin: 2rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.25rem, 5vw, 2rem);
  line-height: 1.22;
  font-weight: 700;
  letter-spacing: -.025em;
}

.insodi-cover__date {
  margin: 1.4rem 0 0;
  font-size: .78rem;
  font-weight: 850;
  letter-spacing: .12em;
  color: var(--brand-red);
}

.insodi-cover__orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(42,165,214,.16);
  z-index: 1;
  pointer-events: none;
}

.orbit-a {
  width: 19rem;
  height: 19rem;
  top: 8rem;
  right: -8.5rem;
}

.orbit-b {
  width: 11rem;
  height: 11rem;
  bottom: 7rem;
  left: -5rem;
  border-color: rgba(243,182,0,.3);
}

.insodi-cover__scroll {
  position: absolute;
  bottom: 2.4rem;
  right: 1.3rem;
  width: 2px;
  height: 3rem;
  background: rgba(17,24,32,.12);
  overflow: hidden;
}

.insodi-cover__scroll span {
  display: block;
  width: 100%;
  height: 42%;
  background: var(--brand-blue);
  animation: insodiScrollCue 1.8s ease-in-out infinite;
}

.insodi-section-head {
  width: min(100%, 50rem);
  margin-bottom: 2.5rem;
}

.insodi-section-head h2 {
  margin: 0;
  font-size: clamp(2.2rem, 10.5vw, 4.65rem);
  line-height: .99;
  letter-spacing: -.055em;
  font-weight: 900;
  text-wrap: balance;
}

.insodi-section-head h3 {
  margin: 1.15rem 0 0;
  color: var(--brand-red);
  font-size: 1rem;
  line-height: 1.25;
  letter-spacing: .08em;
  font-weight: 900;
}

.insodi-reading {
  width: min(100%, var(--max-copy));
  margin-inline: auto;
}

.insodi-paragraph {
  margin: 0 0 2.35rem;
  color: var(--ink-soft);
  font-size: 1.1rem;
  line-height: 1.79;
  letter-spacing: -.01em;
  transition:
    color .35s ease,
    opacity .35s ease,
    transform .45s cubic-bezier(.2,.75,.25,1);
}

.insodi-paragraph.is-current {
  color: var(--ink);
  transform: translateX(.15rem);
}

.scroll-mark {
  --mark-color: rgba(42,165,214,.22);
  display: inline;
  position: relative;
  z-index: 0;
  padding: 0 .05em;
  color: inherit;
  background: none;
  font-weight: 820;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.scroll-mark::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: -.06em;
  right: -.06em;
  bottom: .02em;
  height: .48em;
  border-radius: .18em;
  background: var(--mark-color);
  transform: scaleX(0) rotate(-.7deg);
  transform-origin: left center;
  transition: transform .72s cubic-bezier(.2,.82,.22,1);
}

.scroll-mark.is-marked::before {
  transform: scaleX(1) rotate(-.7deg);
}

.scroll-mark.blue { --mark-color: rgba(42,165,214,.30); }
.scroll-mark.yellow { --mark-color: rgba(243,182,0,.40); }
.scroll-mark.red { --mark-color: rgba(237,20,38,.19); }

.insodi-callout {
  --callout: var(--brand-blue);
  position: relative;
  margin: 3rem 0;
  padding: 1.55rem 1.3rem 1.6rem 1.55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.9);
  box-shadow: 0 18px 50px rgba(13,73,96,.07);
}

.insodi-callout.yellow { --callout: var(--brand-yellow); }
.insodi-callout.blue { --callout: var(--brand-blue); }

.insodi-callout__line {
  position: absolute;
  left: 0;
  top: 1.25rem;
  bottom: 1.25rem;
  width: 5px;
  border-radius: 0 999px 999px 0;
  background: var(--callout);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .85s cubic-bezier(.2,.8,.22,1);
}

.insodi-callout.is-visible .insodi-callout__line {
  transform: scaleY(1);
}

.insodi-callout p,
.insodi-impact p,
.insodi-thesis p,
.insodi-objective-card p,
.insodi-objective-item p,
.insodi-closing p {
  margin: 0;
}

.insodi-callout p {
  color: var(--ink);
  font-size: 1.08rem;
  line-height: 1.72;
  font-weight: 620;
}

.insodi-stats {
  background:
    linear-gradient(180deg, rgba(42,165,214,.06), rgba(42,165,214,.015)),
    #fff;
}

.insodi-impact {
  position: relative;
  margin: 3rem calc(50% - 50vw);
  padding: 3.2rem max(1.15rem, calc(50vw - 21rem));
  background: var(--ink);
  color: #fff;
  overflow: hidden;
}

.insodi-impact::before {
  content: "";
  position: absolute;
  top: -4rem;
  right: -4rem;
  width: 11rem;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 2.3rem solid rgba(42,165,214,.12);
}

.insodi-impact p {
  position: relative;
  z-index: 1;
  font-size: clamp(1.3rem, 5.5vw, 2.15rem);
  line-height: 1.48;
  font-weight: 710;
  letter-spacing: -.025em;
}

.insodi-impact .scroll-mark {
  color: #fff;
}

.insodi-thesis {
  margin: 0 0 2.8rem;
  padding-left: 1rem;
  border-left: .42rem solid var(--brand-blue);
}

.insodi-thesis p {
  color: var(--ink);
  font-size: clamp(1.5rem, 6vw, 2.25rem);
  line-height: 1.3;
  font-weight: 790;
  letter-spacing: -.035em;
}

.insodi-objectives {
  background:
    radial-gradient(circle at 0% 10%, rgba(243,182,0,.12), transparent 22rem),
    radial-gradient(circle at 100% 80%, rgba(42,165,214,.11), transparent 22rem),
    #f8fcfd;
}

.insodi-objective-card {
  padding: 1.7rem 1.35rem 1.8rem;
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  box-shadow: 0 24px 60px rgba(17,24,32,.13);
}

.insodi-objective-card--general {
  margin-bottom: 3.2rem;
}

.insodi-card-label {
  margin-bottom: 1.1rem !important;
  color: var(--brand-yellow);
}

.insodi-objective-card p:last-child {
  font-size: 1.08rem;
  line-height: 1.72;
  font-weight: 560;
}

.insodi-specific h3 {
  margin: 0 0 1rem;
  color: var(--brand-blue-deep);
  font-size: .83rem;
  line-height: 1.2;
  letter-spacing: .11em;
  font-weight: 900;
}

.insodi-objective-item {
  display: grid;
  grid-template-columns: 1rem 1fr;
  gap: .85rem;
  padding: 1.5rem 0;
  border-top: 1px solid #cfdde4;
}

.insodi-objective-item__marker {
  width: .62rem;
  height: .62rem;
  margin-top: .55rem;
  border-radius: 50%;
  background: var(--brand-blue);
  box-shadow: 0 0 0 .32rem rgba(42,165,214,.12);
}

.insodi-objective-item p {
  color: var(--ink);
  font-size: 1.06rem;
  line-height: 1.68;
  font-weight: 610;
}

.insodi-objective-item--key {
  margin: .5rem -.5rem;
  padding: 1.55rem .65rem;
  border: 0;
  border-radius: 1rem;
  background: #fff5c8;
  box-shadow: inset 0 0 0 1px rgba(243,182,0,.25);
}

.insodi-objective-item--key .insodi-objective-item__marker {
  background: var(--brand-yellow);
  box-shadow: 0 0 0 .32rem rgba(243,182,0,.18);
}

.insodi-conclusion .insodi-reading {
  padding-bottom: 2rem;
}

.insodi-closing {
  position: relative;
  margin: 3.3rem 0 0;
  padding: 2rem 1.45rem 2.1rem;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(42,165,214,.12), rgba(243,182,0,.12)),
    #fff;
  border: 1px solid rgba(42,165,214,.2);
}

.insodi-closing::after {
  content: "";
  position: absolute;
  left: 1.45rem;
  right: 1.45rem;
  bottom: 0;
  height: 6px;
  border-radius: 999px 999px 0 0;
  background: linear-gradient(
    90deg,
    var(--brand-blue) 0 52%,
    var(--brand-yellow) 52% 82%,
    var(--brand-red) 82% 100%
  );
}

.insodi-closing p {
  color: var(--ink);
  font-size: 1.16rem;
  line-height: 1.69;
  font-weight: 670;
}

.reveal {
  opacity: 0;
  transform: translateY(1.3rem);
  transition:
    opacity .68s ease,
    transform .78s cubic-bezier(.2,.78,.22,1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes insodiScrollCue {
  0% { transform: translateY(-125%); }
  70%, 100% { transform: translateY(245%); }
}

@media (min-width: 48rem) {
  body {
    font-size: 19px;
  }

  .insodi-chapter {
    top: 1rem;
    left: 50%;
    right: auto;
    width: min(90vw, 39rem);
    transform: translateX(-50%);
    padding-inline: 1rem;
  }

  .insodi-section {
    padding: 8.5rem 2rem 7.5rem;
  }

  .insodi-cover__content {
    text-align: center;
  }

  .insodi-logo-wrap {
    margin-inline: auto;
  }

  .insodi-cover h1 {
    max-width: none;
  }

  .insodi-cover__subtitle {
    margin-inline: auto;
  }

  .insodi-impact {
    border-radius: 1.7rem;
    margin: 3.5rem -4rem;
    padding: 3.5rem 4rem;
  }

  .insodi-callout {
    padding: 2.15rem 2.15rem 2.2rem 2.4rem;
  }

  .insodi-callout p,
  .insodi-objective-card p:last-child,
  .insodi-objective-item p {
    font-size: 1.12rem;
  }

  .insodi-objective-card {
    padding: 2.25rem;
  }

  .insodi-objective-item {
    grid-template-columns: 1rem 1fr;
    gap: 1.2rem;
    padding-block: 1.85rem;
  }

  .insodi-objective-item--key {
    margin-inline: -1rem;
    padding-inline: 1rem;
  }

  .insodi-closing {
    padding: 2.5rem;
  }
}

@media (min-width: 72rem) {
  .insodi-section {
    padding-block: 10rem;
  }

  .insodi-section-head {
    position: relative;
    margin-left: calc((var(--max-shell) - var(--max-copy)) / -2);
  }

  .insodi-reading {
    position: relative;
  }

  .insodi-paragraph {
    font-size: 1.18rem;
    line-height: 1.86;
  }

  .insodi-callout p {
    font-size: 1.16rem;
    line-height: 1.78;
  }

  .insodi-impact {
    margin-inline: -6rem;
    padding: 4.5rem 6rem;
  }

  .insodi-objective-card p:last-child,
  .insodi-objective-item p {
    font-size: 1.15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

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

  .scroll-mark::before {
    transform: scaleX(1) rotate(-.7deg);
  }

  .insodi-callout__line {
    transform: scaleY(1);
  }
}

.insodi-source-period {
  margin: -1rem 0 1.5rem;
  color: var(--ink-soft);
  font-size: 1.1rem;
}