/* ==========================================================================
   Digital Leaders 2026 scrollytelling story
   Emerging brand system: navy / gold / periwinkle / orange, Montserrat.

   Deliberately single-theme. The figures are transparent PNGs carrying dark
   navy type, so they only read on a light ground; a dark variant would need a
   second set of figures rather than a palette swap. Every colour is painted
   explicitly so the page holds on whatever ground the host provides.
   ========================================================================== */

:root {
  color-scheme: light;

  --navy: #0F1374;
  --peri: #4B5BCB;
  --gold: #DBB67D;
  --orange: #FF4901;

  --ground: #FFFFFF;      /* the figures are drawn on nothing, so the page
                             background IS the figure background */
  --tint: #F5F6FC;
  --ink: #14162E;
  --muted: #5E6383;
  --hairline: #E4E7F3;

  --measure: 33rem;
  --f-display: "Montserrat", "Segoe UI", system-ui, sans-serif;
  --f-body: "Montserrat", "Segoe UI", system-ui, sans-serif;
}

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

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

/* ---------------------------------------------------------------- progress */
.progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 60;
  pointer-events: none;
}
.progress__bar {
  height: 100%;
  width: 0;
  background: var(--orange);
}

/* ------------------------------------------------------------------- shell */
.wrap {
  width: min(100% - 3rem, 74rem);
  margin-inline: auto;
}

.kicker {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--peri);
  margin: 0 0 0.9rem;
}

/* -------------------------------------------------------------------- hero */
.hero { padding: 4.5rem 0 3rem; }
.hero__inner { max-width: 52rem; }
.hero h1 {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(2.2rem, 5.2vw, 3.8rem);
  line-height: 1.07;
  letter-spacing: -0.02em;
  color: var(--navy);
  margin: 0 0 1.4rem;
  text-wrap: balance;
}
.hero__stand {
  font-size: clamp(1.05rem, 1.7vw, 1.28rem);
  line-height: 1.6;
  color: var(--muted);
  max-width: 40rem;
  margin: 0 0 2.4rem;
}
.hero__figures {
  display: flex;
  flex-wrap: wrap;
  gap: 2.2rem 3.4rem;
  padding-top: 1.7rem;
  border-top: 3px solid var(--gold);
  max-width: 46rem;
}
.hero__fig { display: flex; flex-direction: column; gap: 0.15rem; }
.hero__fig b {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  color: var(--navy);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.hero__fig span { font-size: 0.82rem; color: var(--muted); line-height: 1.45; }
.hero__cue {
  margin-top: 2.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.hero__cue i {
  width: 1px; height: 24px; background: var(--muted); display: block;
  animation: cue 1.9s ease-in-out infinite;
  transform-origin: top center;
}
@keyframes cue { 0%,100% { transform: scaleY(0.4); opacity: .35 } 50% { transform: scaleY(1); opacity: 1 } }

/* ---------------------------------------------------------------- chapters */
.chapter { padding: 3.5rem 0 0; }
.chapter__head { max-width: var(--measure); }
.chapter__head h2 {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 2.9vw, 2.1rem);
  line-height: 1.16;
  color: var(--navy);
  margin: 0 0 0.7rem;
  text-wrap: balance;
}
.chapter__head p { margin: 0; color: var(--muted); }
.chapter__num {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  display: block;
  margin-bottom: 0.5rem;
}

/* ----------------------------------------------------------- scrolly block

   No card, no border, no shadow: the graphic sits straight on the page, the
   way a figure sits in an article. The sticky column must stay SHORTER than
   one step (86vh against 100vh) or it has no room to stick and scrolls away. */
.scrolly {
  display: grid;
  grid-template-columns: minmax(0, 23rem) minmax(0, 1fr);
  gap: 0 4.5rem;
  align-items: start;
}
.scrolly__graphic {
  position: sticky;
  top: 7vh;
  height: 86vh;
  display: flex;
  align-items: center;
  justify-content: center;
  order: 2;
}
.scrolly__steps { order: 1; }

.stack {
  position: relative;
  width: 100%;
  height: 100%;
}
.layer {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 220ms ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.layer.is-active { opacity: 1; }
.layer img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}

.step {
  min-height: 100vh;
  display: flex;
  align-items: center;
}
.step__card { max-width: var(--measure); padding: 1.5rem 0; }
.step h3 {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.35;
  color: var(--navy);
  margin: 0 0 0.7rem;
  text-wrap: balance;
  transition: color 200ms ease;
}
.step p { margin: 0 0 0.9rem; }
.step p:last-child { margin-bottom: 0; }
.step .lede { font-size: 1.02rem; }
.step .stat {
  font-family: var(--f-display);
  font-weight: 800;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}
.step .note {
  font-size: 0.8rem;
  color: var(--muted);
  border-left: 2px solid var(--gold);
  padding-left: 0.9rem;
  line-height: 1.6;
}
.step[data-active="true"] h3 { color: var(--peri); }

/* ------------------------------------------------------------ waffle chart */
.waffle-holder {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--ink);
}
.waffle-caption {
  font-family: var(--f-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 0.9rem;
}
.waffle-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  margin-top: 1rem;
  font-size: 0.72rem;
  color: var(--ink);
}
.waffle-legend span { display: inline-flex; align-items: center; gap: 0.35rem; }
.waffle-legend i { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }

/* ------------------------------------------------------------------- outro */
.outro {
  margin-top: 4rem;
  padding: 4rem 0 4.5rem;
  background: var(--navy);
  color: #EDEFFB;
}
.outro h2 {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(1.65rem, 3.2vw, 2.4rem);
  margin: 0 0 1rem;
  color: #FFFFFF;
  text-wrap: balance;
}
.outro p { max-width: 40rem; color: #C6CBEC; }
.outro .cta {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.85rem 1.6rem;
  background: var(--orange);
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
}
.outro .cta:hover { background: #E33F00; }
.outro__meta {
  margin-top: 2.8rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 0.78rem;
  color: #A9AFD8;
  max-width: 46rem;
  line-height: 1.65;
}

/* --------------------------------------------------------------- a11y/misc */
a:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* -------------------------------------------------------------- responsive */
@media (max-width: 900px) {
  .scrolly { grid-template-columns: 1fr; gap: 0; }
  .scrolly__graphic {
    order: 1;
    top: 0;
    height: auto;
    padding: 0.9rem 0;
    background: var(--ground);
    z-index: 20;
    border-bottom: 1px solid var(--hairline);
  }
  .scrolly__steps { order: 2; }
  .stack { height: 44vh; }
  .step { min-height: 76vh; }
  .hero { padding: 2.75rem 0 2.25rem; }
  .hero__figures { gap: 1.5rem 2.2rem; }
  .wrap { width: min(100% - 2.5rem, 74rem); }
}

@media (prefers-reduced-motion: reduce) {
  .layer, .step h3 { transition: none; }
  .hero__cue i { animation: none; }
  html { scroll-behavior: auto; }
}