:root {
  color-scheme: dark;
  --ink: #080907;
  --paper: #eeede5;
  --muted: #8c8d86;
  --line: rgba(238, 237, 229, 0.14);
  --signal: #22a96a;
  --ease: cubic-bezier(0.77, 0, 0.18, 1);
  font-family: Arial, Helvetica, sans-serif;
  background: var(--ink);
  color: var(--paper);
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; background: var(--ink); }

body {
  min-width: 280px;
  min-height: 100svh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

button, a { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 1rem;
  padding: 0.75rem 1rem;
  color: var(--ink);
  background: var(--signal);
  transform: translateY(-110%);
}

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

.experience {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 82% 14%, rgba(34, 169, 106, 0.045), transparent 26rem),
    var(--ink);
}

.experience::after {
  content: '';
  position: absolute;
  z-index: 20;
  inset: 0;
  pointer-events: none;
  opacity: 0.13;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.22'/%3E%3C/svg%3E");
}

.field { position: absolute; z-index: -1; inset: 0; pointer-events: none; }

.field__line { position: absolute; background: var(--line); }
.field__line--vertical { top: 0; bottom: 0; left: 18px; width: 1px; }
.field__line--horizontal { right: 0; bottom: 88px; left: 0; height: 1px; }

.field__signal {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 18px;
  width: 1px;
  background: linear-gradient(transparent 5%, var(--signal) 48%, transparent 55%);
  background-size: 100% 220%;
  animation: scan 9s linear infinite;
  opacity: 0.7;
}

.masthead {
  position: absolute;
  z-index: 10;
  top: max(1.25rem, env(safe-area-inset-top));
  right: 1.25rem;
  left: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.masthead__counter { margin-left: auto; color: var(--muted); font-variant-numeric: tabular-nums; }
.masthead__counter span { color: var(--signal); }

.panels { min-height: 100svh; }

.panel {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: max(6.5rem, calc(env(safe-area-inset-top) + 5.5rem)) 1.5rem max(1.35rem, env(safe-area-inset-bottom));
  visibility: hidden;
  transform: translateX(8%);
  opacity: 0;
  transition: opacity 520ms ease, transform 760ms var(--ease), visibility 760ms;
}

.panel::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 680ms var(--ease);
}

.panel.is-active { visibility: visible; transform: translateX(0); opacity: 1; }
.panel.is-past { transform: translateX(-8%); }
.panel.is-past::before { transform: scaleX(1); transform-origin: left; }

.panel__content {
  width: 100%;
  max-width: 38rem;
  margin: auto 0;
}

.panel__content--discovery { margin-top: auto; }

.eyebrow {
  margin: 0 0 1.15rem;
  color: var(--signal);
  font-size: 0.61rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.22em;
}

h1, h2, p { margin-top: 0; }

h1 {
  margin-bottom: 2rem;
  font-size: clamp(2.6rem, 13.5vw, 7rem);
  font-weight: 800;
  line-height: 0.82;
  letter-spacing: -0.075em;
}

h1 span, .contract span { color: var(--signal); }

.lead {
  margin-bottom: 0;
  color: #bbbcb4;
  font-size: clamp(1.15rem, 5.4vw, 1.75rem);
  line-height: 1.35;
  letter-spacing: -0.025em;
}

.statement, .contract {
  margin-bottom: 1.75rem;
  font-size: clamp(2.1rem, 9.5vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.explanation {
  padding-left: 1rem;
  border-left: 1px solid var(--line);
}

.explanation p {
  margin-bottom: 1.05rem;
  color: #aaa9a2;
  font-size: clamp(0.94rem, 4.25vw, 1.15rem);
  line-height: 1.45;
}

.explanation .runner-line { margin-top: 1.75rem; margin-bottom: 0; color: var(--paper); }
.runner-line strong { color: var(--signal); font-weight: 700; }

.contract-copy {
  margin-bottom: 2rem;
  color: #aaa9a2;
  font-size: clamp(1rem, 4.6vw, 1.25rem);
  line-height: 1.4;
}

.cycle { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); counter-reset: cycle; }
.cycle li {
  counter-increment: cycle;
  display: flex;
  align-items: center;
  min-height: 2.05rem;
  border-bottom: 1px solid var(--line);
  color: #c1c0b8;
  font-size: 0.59rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.cycle li::before { content: '0' counter(cycle); width: 2.3rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.cycle li:not(:last-child)::after { content: '↓'; margin-left: auto; color: var(--signal); }

.advance {
  position: relative;
  display: grid;
  flex: 0 0 auto;
  grid-template-columns: auto 3rem;
  align-items: center;
  align-self: flex-start;
  gap: 0.9rem;
  width: max-content;
  max-width: 100%;
  min-height: 3rem;
  margin-top: 2rem;
  padding: 0;
  border: 0;
  border-radius: 0;
  color: var(--paper);
  background: transparent;
  font: inherit;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.advance > span:first-child {
  position: relative;
  padding: 0.5rem 0;
}

.advance > span:first-child::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0.28);
  transform-origin: left;
  opacity: 0.55;
  transition: transform 280ms var(--ease), opacity 280ms ease;
}

.arrow {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  overflow: hidden;
  border: 1px solid rgba(34, 169, 106, 0.72);
  color: var(--signal);
  font-size: 1.2rem;
  transition: color 180ms ease, transform 280ms var(--ease);
}

.arrow::before {
  content: '';
  position: absolute;
  z-index: -1;
  inset: 0;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 280ms var(--ease);
}

.advance:hover > span:first-child::after,
.advance:focus-visible > span:first-child::after,
.advance:active > span:first-child::after,
.advance.is-triggered > span:first-child::after {
  transform: scaleX(1);
  opacity: 1;
}

.advance:hover .arrow::before,
.advance:focus-visible .arrow::before,
.advance:active .arrow::before,
.advance.is-triggered .arrow::before { transform: scaleX(1); }

.advance:hover .arrow,
.advance:focus-visible .arrow,
.advance:active .arrow,
.advance.is-triggered .arrow {
  color: var(--ink);
  transform: translateX(0.3rem);
}

.advance:focus-visible { outline: 2px solid var(--signal); outline-offset: 0.35rem; }
.advance--final { color: var(--signal); }

.coordinates {
  position: absolute;
  z-index: 10;
  top: 50%;
  right: -2.6rem;
  display: none;
  gap: 2rem;
  color: var(--muted);
  font-size: 0.54rem;
  letter-spacing: 0.18em;
  transform: rotate(90deg);
}

.noscript {
  position: fixed;
  z-index: 200;
  inset: 0;
  display: grid;
  place-content: center;
  padding: 2rem;
  color: var(--paper);
  background: var(--ink);
  text-align: center;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
}

.noscript a { margin-top: 2rem; color: var(--signal); }

@keyframes scan { from { background-position: 0 -120%; } to { background-position: 0 120%; } }

@media (min-width: 700px) {
  .field__line--vertical, .field__signal { left: 5vw; }
  .masthead { top: 2rem; right: 5vw; left: 5vw; }
  .panel { padding: 7.5rem 10vw 2.5rem; }
  .panel__content { margin-left: 5vw; }
  .panel__content--contract { display: grid; grid-template-columns: minmax(20rem, 1fr) minmax(15rem, 0.65fr); column-gap: 8vw; align-items: end; max-width: 70rem; }
  .panel__content--contract .eyebrow, .panel__content--contract .contract, .panel__content--contract .contract-copy { grid-column: 1; }
  .panel__content--contract .cycle { grid-column: 2; grid-row: 1 / 5; align-self: center; }
  .advance { margin-left: auto; }
  .coordinates { display: flex; }
}

@media (max-height: 680px) and (max-width: 699px) {
  .panel { padding-top: 5rem; }
  .panel__content { margin-bottom: 0.5rem; }
  h1 { margin-bottom: 1.25rem; font-size: 3.25rem; }
  .statement, .contract { margin-bottom: 1rem; font-size: 2rem; }
  .explanation p { margin-bottom: 0.7rem; line-height: 1.3; }
  .explanation .runner-line { margin-top: 1rem; }
  .contract-copy { margin-bottom: 1rem; }
  .advance { margin-top: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}