/*
 * The page's own layer. Everything Fristil ships sits in @layer fristil, so anything here wins
 * without !important. Colours and spacing come from the theme's tokens. The page is dark only:
 * a wet street at night, one lamp, and everything else left to the shadows.
 */

:root {
  --font-text: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-display: "Big Shoulders Display", "Arial Narrow", "Helvetica Neue", sans-serif;
  --font-code: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --measure: 68rem;

  --lamp: var(--fs-color-accent-text);
  --night: var(--fs-color-neutral-canvas);
  --shade: color-mix(in oklch, var(--night) 82%, transparent);

  --street: url("night-street-2400.webp");
  --cobbles: url("night-cobbles-1800.webp");

  /* Film grain: fractal noise, desaturated, laid over everything at low opacity. */
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

@media (max-width: 50rem) {
  :root {
    --street: url("night-street-1200.webp");
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  background: var(--night);
}

body {
  margin: 0;
  font-family: var(--font-text);
  color: var(--fs-color-neutral-text);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  background-image: var(--grain);
  opacity: 0.07;
  mix-blend-mode: overlay;
}

code,
pre {
  font-family: var(--font-code);
}

:not(pre) > code {
  padding: 0 var(--fs-spacing-1);
  border-radius: var(--fs-spacing-1);
  background: var(--fs-color-neutral-surface);
  color: var(--fs-color-neutral-text-strong);
  font-size: 0.9em;
}

.fs-heading {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--fs-color-neutral-text-strong);
}

.eyebrow {
  margin: 0 0 var(--fs-spacing-2);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--font-size-l);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--lamp);
}

/*
 * The street: the photograph, darkened toward the edges and into the page below. It is anchored
 * a little right of centre so the lamp stays in the picture when a phone crops it.
 */

.street {
  position: relative;
  display: grid;
  min-block-size: 100svh;
  padding: var(--fs-spacing-16) var(--fs-spacing-4) var(--fs-spacing-8);
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(ellipse 70% 60% at 50% 45%, transparent 0%, var(--shade) 100%),
    linear-gradient(to bottom, var(--shade) 0%, transparent 30%, transparent 60%, var(--night) 100%),
    var(--night) var(--street) 62% center / cover no-repeat;
}

@media (max-width: 50rem) {
  .street {
    background-position:
      center,
      center,
      74% center;
  }
}

.title {
  align-self: center;
  justify-self: center;
  max-inline-size: 48rem;
  text-align: center;
}

.title h1 {
  margin: 0;
  font-size: clamp(5rem, 22vw, 13rem);
  font-weight: 900;
  line-height: 0.85;
  letter-spacing: 0.04em;
  text-shadow:
    0 0 0.4em color-mix(in oklch, var(--lamp) 25%, transparent),
    0 0.05em 0.3em var(--night);
}

.title > .fs-paragraph {
  margin: var(--fs-spacing-6) auto 0;
  max-inline-size: 34rem;
  color: var(--fs-color-neutral-text-strong);
  text-shadow: 0 0 1em var(--night);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--fs-spacing-3);
  margin-block-start: var(--fs-spacing-8);
}

.actions .fs-button[data-variant="ghost"] {
  color: var(--fs-color-neutral-text-strong);
  box-shadow: inset 0 0 0 var(--fs-spacing-px) var(--fs-color-neutral-border);
}


/* Rain: two sheets of fine streaks falling at slightly different angles and speeds. */

.rain {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    repeating-linear-gradient(
      100deg,
      transparent 0 0.9rem,
      color-mix(in oklch, var(--fs-color-neutral-text) 30%, transparent) 0.9rem 0.95rem,
      transparent 0.95rem 2.3rem
    ),
    repeating-linear-gradient(
      104deg,
      transparent 0 1.6rem,
      color-mix(in oklch, var(--fs-color-neutral-text) 18%, transparent) 1.6rem 1.64rem,
      transparent 1.64rem 3.1rem
    );
  background-size:
    100% 9rem,
    100% 13rem;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
  animation: rain 0.9s linear infinite;
}

@keyframes rain {
  to {
    background-position:
      -1.6rem 9rem,
      -2.4rem 13rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rain {
    animation: none;
  }
}

/* A band of wet stones between sections. */

.course {
  block-size: var(--fs-spacing-12);
  background:
    linear-gradient(to bottom, var(--night), transparent 35%, transparent 65%, var(--night)),
    var(--night) var(--cobbles) center / 56rem auto repeat-x;
}

/* Content */

.section {
  max-inline-size: var(--measure);
  margin-inline: auto;
  padding: var(--fs-spacing-16) var(--fs-spacing-4);
}

.section > .fs-heading {
  margin-block: 0 var(--fs-spacing-6);
  font-size: clamp(2.75rem, 7vw, 5rem);
  line-height: 0.95;
}

.section > .fs-paragraph {
  max-inline-size: 44rem;
}

.demo {
  margin: var(--fs-spacing-10) 0 0;
}

.demo img {
  display: block;
  inline-size: 100%;
  block-size: auto;
  border: var(--fs-spacing-px) solid var(--fs-color-neutral-border-subtle);
  border-radius: var(--fs-spacing-2);
  box-shadow:
    0 0 0 var(--fs-spacing-px) var(--night),
    0 2rem 4rem -1rem color-mix(in oklch, var(--lamp) 14%, transparent);
}

.cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  gap: var(--fs-spacing-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.cases .fs-card {
  border-color: var(--fs-color-neutral-border-subtle);
  border-block-start: var(--fs-spacing-0-5) solid var(--lamp);
  border-radius: 0;
  background: var(--fs-color-neutral-surface);
}

.cases .fs-card__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--font-size-xxl);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.cases .fs-paragraph {
  margin-block-end: 0;
}

.case {
  margin: 0 0 var(--fs-spacing-1);
  font-family: var(--font-code);
  font-size: var(--font-size-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fs-color-neutral-text-subtle);
}

.install {
  margin: var(--fs-spacing-6) 0;
  padding: var(--fs-spacing-5);
  overflow-x: auto;
  border-inline-start: var(--fs-spacing-0-5) solid var(--lamp);
  background: var(--fs-color-neutral-surface);
  color: var(--fs-color-neutral-text-strong);
}

.prompt {
  color: var(--lamp);
  user-select: none;
}

/* Footer */

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--fs-spacing-4);
  max-inline-size: var(--measure);
  margin-inline: auto;
  padding: var(--fs-spacing-8) var(--fs-spacing-4) var(--fs-spacing-10);
  border-block-start: var(--fs-spacing-px) solid var(--fs-color-neutral-border-subtle);
}

.footer .fs-paragraph {
  margin: 0;
}

/* The mark's red is Søbernetics' own, not the theme's, so it is the one colour written out. */
.sobernetics {
  --sobernetics-accent: #f44851;
  color: var(--fs-color-neutral-text-subtle);
}

.sobernetics:hover,
.sobernetics:focus-visible {
  color: var(--fs-color-neutral-text-strong);
}

.sobernetics svg {
  display: block;
  block-size: 1.125rem;
  inline-size: auto;
}