.container {
  width: 100%;
  max-width: var(--container-max-width);
  
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container--prose {
  max-width: 68ch;
}

.section {
  padding-block: var(--section-padding-y);
}

.section--tight {
  padding-block: calc(var(--section-padding-y) * 0.5);
}

.section + .section:not([class*="surface--"]) {
  padding-block-start: 0;
}

.section--screen {
  min-block-size: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.section--screen > * {
  min-width: 0;
}

.section + .section.section--screen {
  padding-block-start: var(--section-padding-y);
}

.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns, 12), minmax(0, 1fr));
  gap: var(--grid-gap, var(--space-5));
}

.grid > *,
.cluster > *,
.stack > * {
  min-width: 0;
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cluster-gap, var(--space-4));
  align-items: var(--cluster-align, center);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--stack-gap, var(--space-4));
}

.auto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(var(--auto-grid-min, 17rem), 100%), 1fr));
  gap: var(--grid-gap, var(--space-5));
}

.auto-grid > * {
  min-width: 0;
}

.surface,
.surface--light {
  background-color: var(--color-bg);
  color: var(--color-text);
}

.surface--subtle {
  background-color: var(--color-bg-subtle);
}

.surface--ink {
  background-color: var(--color-bg-ink);
}

.surface--world {
  background-color: transparent;
}

.surface--elevated {
  background-color: var(--color-bg-elevated);
}

.surface--mesh {
  background: var(--gradient-mesh);
  
  position: relative;
  isolation: isolate;
}

.surface--mesh > .mesh-canvas {
  position: absolute;
  inset: 0;
  display: block;
  inline-size: 100%;
  block-size: 100%;
  z-index: 0;
  
  pointer-events: none;

}

.surface--mesh > .container {
  position: relative;
  z-index: 1;
}

.immersive {
  position: relative;

background-color: var(--color-deep);
  background-image: var(--gradient-mesh-layers);
  background-repeat: no-repeat;
  background-size: 100% calc(100svh + var(--header-height) + var(--header-inset));
}

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

.immersive__stage {
  position: sticky;
  inset-block-start: 0;
  block-size: min(100%, 100svh);
}

.immersive__stage > .mesh-canvas {
  position: absolute;
  inset: 0;
  display: block;
  inline-size: 100%;
  block-size: 100%;
  z-index: 0;
  pointer-events: none;
}

@keyframes mesh-canvas-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@media (prefers-reduced-motion: no-preference) {
  .mesh-canvas {
    animation: mesh-canvas-in var(--duration-slower) var(--easing-standard) both;
  }
}

.immersive__stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.86' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: var(--immersive-grain-tile) var(--immersive-grain-tile);
}

.immersive--live .immersive__stage::after {
  opacity: calc(
    var(--world-grain-void) +
    (var(--world-grain-immersive) - var(--world-grain-void)) * var(--world-scene, 1)
  );
}

.immersive--no-grain .immersive__stage::after {
  content: none;
}

.immersive__index {
  position: absolute;
  inset-block-end: var(--space-6);
  inset-inline-start: var(--container-padding);
  z-index: 1;

  display: flex;
  align-items: center;
  gap: var(--space-3);

  font-size: var(--font-size-sm);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.14em;
  color: var(--color-text);
  opacity: 0;
  pointer-events: none;
}

.immersive__index::before {
  content: "";
  inline-size: var(--space-6);
  block-size: 1px;
  background-color: currentColor;
}

.immersive--live .immersive__index {
  opacity: 0.24;
}

.immersive main > .section > .container {
  position: relative;
  z-index: 1;
}

.immersive main > .section > .system__story {
  position: relative;
  z-index: 1;
}

.immersive main > .section > .problem__story {
  position: relative;
  z-index: 1;
}

.immersive main > .section > .process__story {
  position: relative;
  z-index: 1;
}

.immersive > .footer {
  position: relative;
  z-index: 1;
}

.surface-fade {
  block-size: var(--space-8);
  background: var(--gradient-fade-deep);
}

.header + main > .section:first-child {
  
  margin-block-start: calc((var(--header-height) + var(--header-inset)) * -1);
  padding-block-start: calc(var(--section-padding-y) + var(--header-height) + var(--header-inset));
}

.header + .immersive {
  margin-block-start: calc((var(--header-height) + var(--header-inset)) * -1);
}

.header + .immersive > main > .section:first-of-type {
  padding-block-start: calc(var(--section-padding-y) + var(--header-height) + var(--header-inset));
}

.form__trap {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

:target,
[data-anchor] {

scroll-margin-block-start: var(--header-offset, var(--header-height));
}