/* ui-effects catalogue site. Colours are SIMAI Framework roles, so the
   whole site follows .theme-light / .theme-dark on <html>. Every effect area
   takes the theme the effect is drawn in (SF.Effects of the core). */

/* Secondary text. In the dark theme on-surface-variant reaches only 4.0:1 on
   surface-container, so it is mixed towards on-surface there (4.5:1 or more). */
.theme-light { --ink-muted: var(--sf-on-surface-variant); }
.theme-dark { --ink-muted: color-mix(in srgb, var(--sf-on-surface) 35%, var(--sf-on-surface-variant)); }

:root {
  --gutter: 1rem;
  --radius-s: 0.5rem;
  --radius-m: 0.75rem;
  --radius-l: 1rem;
  --veil: 84%;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (min-width: 48rem) { :root { --gutter: 2rem; } }

html { background: var(--sf-surface-0); }
body {
  margin: 0;
  min-block-size: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--sf-surface-0);
  color: var(--sf-on-surface);
  overflow-x: clip;
}
main { flex: 1; }
img { max-inline-size: 100%; display: block; }
a { color: var(--sf-primary); text-underline-offset: 0.2em; }
code, pre { font-family: var(--mono); }
h1, h2, h3, p { margin: 0; }
h1 { font-size: clamp(1.75rem, 1.3rem + 1.8vw, 2.5rem); line-height: 1.15; font-weight: 700; letter-spacing: -0.01em; }
h2 { font-size: 1.375rem; line-height: 1.3; font-weight: 700; }
h3 { font-size: 1.0625rem; line-height: 1.4; font-weight: 700; }
.muted { color: var(--ink-muted); }
.small { font-size: 0.875rem; line-height: 1.45; }

/* Focus: one visible ring for every control. */
:focus-visible {
  outline: 2px solid var(--sf-primary);
  outline-offset: 2px;
}
.skip {
  position: absolute;
  inset-inline-start: var(--gutter);
  inset-block-start: -4rem;
  z-index: 10;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-s);
  background: var(--sf-primary);
  color: var(--sf-on-primary);
}
.skip:focus { inset-block-start: 0.5rem; }

.wrap {
  inline-size: 100%;
  max-inline-size: 78rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
  box-sizing: border-box;
}

/* Header */
.top { border-block-end: 1px solid var(--sf-outline-variant); background: var(--sf-surface-0); }
.top__row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1.5rem; padding-block: 0.75rem; }
.brand { display: inline-flex; align-items: center; gap: 0.625rem; color: var(--sf-on-surface); text-decoration: none; font-weight: 700; }
.brand__mark { inline-size: 1.75rem; block-size: 1.75rem; color: var(--sf-primary); }
.brand__sub { display: block; font-size: 0.75rem; font-weight: 500; color: var(--ink-muted); }
.top__nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; margin-inline-start: auto; }
.top__nav a { color: var(--sf-on-surface); text-decoration: none; padding-block: 0.5rem; }
.top__nav a:hover { color: var(--sf-primary); text-decoration: underline; }
@media (max-width: 40rem) {
  .top__nav { margin-inline-start: 0; order: 3; inline-size: 100%; }
  .top__theme { margin-inline-start: auto; }
}

/* Switches are the Framework's segmented Button Group; these are the code tabs. */
.tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  min-block-size: 2.5rem;
  padding: 0 0.875rem;
  border: 0;
  border-radius: var(--radius-s);
  background: transparent;
  color: var(--ink-muted);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.tab:hover { background: var(--sf-surface-container-hover); color: var(--sf-on-surface); }
.tab[aria-selected="true"] { background: var(--sf-primary); color: var(--sf-on-primary); }
.count { font-variant-numeric: tabular-nums; }

/* Badges */
.badges { display: flex; flex-wrap: wrap; gap: 0.25rem; }
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0 0.5rem;
  border-radius: 1rem;
  border: 1px solid var(--sf-outline-variant);
  font-size: 0.75rem;
  line-height: 1.375rem;
  font-weight: 600;
}
/* Scheme badges keep their own look in both site themes: a dark chip and a light chip. */
.badge--dark { background: var(--sf-neutral-10, #1a1b1f); color: var(--sf-neutral-95, #f1f0f4); border-color: var(--sf-neutral-10, #1a1b1f); }
.badge--light { background: var(--sf-neutral-98, #faf9fe); color: var(--sf-neutral-10, #1a1b1f); border-color: var(--sf-neutral-80, #c6c6ca); }

/* Gallery */
.intro {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-block-end: 1px solid var(--sf-outline-variant);
}
.intro__body { display: grid; gap: 1rem; padding-block: clamp(2.5rem, 6vw, 5rem); }
.intro__body > * { max-inline-size: 44rem; }
.intro__lead { font-size: 1.0625rem; line-height: 1.55; }
.intro__note {
  justify-self: start;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  background: color-mix(in srgb, var(--sf-surface-0) var(--veil), transparent);
  font-size: 0.875rem;
}
.gallery { display: grid; gap: 1.25rem; padding-block: 2rem 3rem; }
.gallery > * { min-inline-size: 0; }
.gallery__bar { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1rem; }
/* sf-button-group is display: contents; its track is the box that must not
   outgrow the bar (it scrolls inside itself when narrow). */
.gallery__bar .sf-button-group, .toolbar .sf-button-group { max-inline-size: 100%; min-inline-size: 0; }
.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr)); }
.card {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr;
  border: 1px solid var(--sf-outline-variant);
  border-radius: var(--radius-l);
  background: var(--sf-surface-container);
  overflow: hidden;
}
.card:hover { border-color: var(--sf-outline); }
.card:focus-within { border-color: var(--sf-primary); outline: 2px solid var(--sf-primary); outline-offset: 2px; }
.card__img { aspect-ratio: 16 / 9; inline-size: 100%; block-size: auto; object-fit: cover; background: var(--sf-surface-container-hover); }
.card__body { display: grid; gap: 0.5rem; align-content: start; padding: 0.875rem 1rem 1rem; }
.card__title a { color: var(--sf-on-surface); text-decoration: none; }
.card__title a::after { content: ""; position: absolute; inset: 0; }
.card__title a:focus-visible { outline: none; }
.card__desc {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  color: var(--ink-muted);
}
.card__pair { color: var(--ink-muted); }

/* Effect page */
.crumbs { padding-block: 1rem 0; }
.crumbs a { display: inline-flex; align-items: center; min-block-size: 2.5rem; }
.head { display: grid; gap: 0.75rem; padding-block: 0.5rem 1.5rem; max-inline-size: 52rem; }
.head__facts { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem; }
.toolbar { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 0.75rem 1.25rem; }
.field-group { display: grid; gap: 0.25rem; }
.field-group__label { font-size: 0.8125rem; font-weight: 600; color: var(--ink-muted); }
.policy {
  display: grid;
  gap: 0.25rem;
  margin-block: 1rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-m);
  background: var(--sf-surface-container);
}
.policy[data-outcome="pair"] { background: var(--sf-primary-container); color: var(--sf-on-primary-container); }
.policy[data-outcome="hidden"] { background: var(--sf-warning-container); color: var(--sf-on-warning-container); }
.policy[data-outcome="pair"] .muted, .policy[data-outcome="hidden"] .muted { color: inherit; }

/* Stage: a demo page. The hero is the effect area in the hero layout; the
   card group is the area in the windows layout. */
.stage {
  display: grid;
  gap: 1.25rem;
  padding: 1.25rem;
  border: 1px solid var(--sf-outline-variant);
  border-radius: var(--radius-l);
  background: var(--sf-surface-0);
  overflow: hidden;
}
.demo-hero {
  display: flex;
  align-items: center;
  min-block-size: 26rem;
  padding: clamp(1.25rem, 5vw, 3.5rem);
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--sf-outline-variant);
}
.demo-hero[data-sf-effect-state] { border-color: transparent; }
/* The core's placement: a layer under the area's content; the area, or each
   window card, takes the theme the effect is drawn in, and its ink with the
   class sf-effect-area (SF.Effects). The site adds only the ground. */
.demo-hero { position: relative; isolation: isolate; }
[data-sf-effect-layer] { position: absolute; inset: 0; z-index: -1; overflow: hidden; border-radius: inherit; pointer-events: none; }
.intro.theme-dark, .intro.theme-light,
.demo-hero.theme-dark, .demo-hero.theme-light,
[data-effect-window].theme-dark, [data-effect-window].theme-light { background-color: var(--sf-surface-0); }
[data-sf-effect-state="running"] [data-effect-window] { background-color: transparent; }
.demo-hero__body { display: grid; gap: 1rem; max-inline-size: 36rem; }
/* Small accent text over a moving effect sits on a veil (THEMES.md, R5). */
.demo-hero__eyebrow {
  justify-self: start;
  padding: 0.125rem 0.625rem;
  border-radius: 1rem;
  background: color-mix(in srgb, var(--sf-surface-0) var(--veil), transparent);
  color: var(--sf-primary);
  font-size: 0.875rem;
  font-weight: 600;
}
.demo-hero__title { font-size: clamp(1.75rem, 1.2rem + 2.4vw, 3rem); line-height: 1.1; font-weight: 700; text-wrap: balance; }
.demo-hero__lead { font-size: 1.0625rem; line-height: 1.55; max-inline-size: 32rem; }
.demo-hero__actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-block-size: 2.5rem;
  padding: 0 1rem;
  border: 1px solid var(--sf-outline);
  border-radius: var(--radius-s);
  background: transparent;
  color: var(--sf-on-surface);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: var(--sf-surface-container-hover); }
.btn--primary { border-color: var(--sf-primary); background: var(--sf-primary); color: var(--sf-on-primary); }
.btn--primary:hover { background: var(--sf-primary-hover, var(--sf-primary)); }
.btn--small { min-block-size: 2.25rem; padding: 0 0.75rem; font-size: 0.875rem; }
[data-sf-effect-state] .btn:not(.btn--primary) { background: color-mix(in srgb, var(--sf-surface-0) var(--veil), transparent); }

.demo-cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 14rem), 1fr)); }
.demo-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  min-block-size: 9.5rem;
  padding: 1rem;
  border: 1px solid var(--sf-outline-variant);
  border-radius: var(--radius-m);
  background: var(--sf-surface-container);
  color: var(--sf-on-surface);
}
.demo-card__icon { inline-size: 1.75rem; block-size: 1.75rem; color: var(--sf-primary); }
.demo-card__text { display: grid; gap: 0.25rem; }
[data-sf-effect-state="running"] .demo-card[data-effect-window] { border-color: transparent; }
/* The veil under window captions fades in from the effect: transparent at its
   top edge, full strength from where the text starts. The text lines sit on the
   full-strength part, so the contrast readout composites --window-veil. */
@property --window-veil { syntax: "<color>"; inherits: false; initial-value: transparent; }
[data-sf-effect-state="running"] [data-effect-window] .demo-card__text {
  --window-veil: color-mix(in srgb, var(--sf-surface-0) var(--veil), transparent);
  margin: -1rem;
  margin-block-start: -1.75rem;
  padding: 2.5rem 1rem 0.75rem;
  border-radius: 0 0 var(--radius-m) var(--radius-m);
  background: linear-gradient(to bottom, transparent, var(--window-veil) 2.25rem);
}
[data-sf-effect-state="running"] [data-effect-window] .demo-card__icon {
  align-self: flex-start;
  padding: 0.375rem;
  border-radius: 50%;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--sf-surface-0) var(--veil), transparent) 55%, transparent);
}
.fallback-note { padding: 0.75rem 1rem; border-radius: var(--radius-m); background: var(--sf-error-container); color: var(--sf-on-error-container); }

.readout {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-block: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-m);
  background: var(--sf-surface-container);
}
.readout[data-state="warn"] { background: var(--sf-warning-container); color: var(--sf-on-warning-container); }
.readout__mark { inline-size: 0.75rem; block-size: 0.75rem; border-radius: 50%; background: var(--sf-on-surface-variant); flex: none; }
.readout[data-state="ok"] .readout__mark { background: var(--sf-success); }
.readout[data-state="warn"] .readout__mark { background: var(--sf-warning); }

/* Settings and code */
.panels { display: grid; gap: 1rem; padding-block: 0.5rem 3rem; }
@media (min-width: 64rem) { .panels { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: start; } }
.panel { display: grid; gap: 1rem; min-inline-size: 0; padding: 1.25rem; border-radius: var(--radius-l); background: var(--sf-surface-container); }
.panel__head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem; }
.form { display: grid; gap: 1rem; }
.field { display: grid; gap: 0.25rem; }
.field__head { display: flex; justify-content: space-between; gap: 0.5rem; }
.field__label { font-weight: 600; }
.field__value { font-variant-numeric: tabular-nums; color: var(--ink-muted); }
.field input[type="range"] { inline-size: 100%; min-block-size: 1.75rem; accent-color: var(--sf-primary); margin: 0; }
.field select,
.field input[type="text"] {
  min-block-size: 2.5rem;
  padding: 0 0.75rem;
  border: 1px solid var(--sf-outline);
  border-radius: var(--radius-s);
  background: var(--sf-surface-0);
  color: var(--sf-on-surface);
  font: inherit;
}
.check-row { display: flex; align-items: center; gap: 0.625rem; min-block-size: 2.5rem; cursor: pointer; }
.check-row input { inline-size: 1.25rem; block-size: 1.25rem; margin: 0; accent-color: var(--sf-primary); }
.colour { display: flex; gap: 0.5rem; align-items: center; }
.colour input[type="color"] { inline-size: 2.5rem; block-size: 2.5rem; padding: 0.125rem; border: 1px solid var(--sf-outline); border-radius: var(--radius-s); background: var(--sf-surface-0); }
.colour input[type="text"] { flex: 1; min-inline-size: 0; }
.hint { color: var(--ink-muted); font-size: 0.875rem; }
.invalid { color: var(--sf-error); font-size: 0.875rem; }
.notice { padding: 0.75rem 1rem; border-radius: var(--radius-m); background: var(--sf-surface-0); border: 1px solid var(--sf-outline-variant); }

.tabs { display: flex; flex-wrap: wrap; gap: 0.25rem; padding: 0.25rem; border-radius: var(--radius-m); background: var(--sf-surface-0); justify-self: start; }
.code-block { display: grid; gap: 0.5rem; }
.code-block__head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem; }
.code-block__title { font-weight: 600; }
pre.code {
  margin: 0;
  max-block-size: 26rem;
  overflow: auto;
  padding: 0.875rem 1rem;
  border: 1px solid var(--sf-outline-variant);
  border-radius: var(--radius-m);
  background: var(--sf-surface-0);
  color: var(--sf-on-surface);
  font-size: 0.8125rem;
  line-height: 1.55;
  white-space: pre;
  tab-size: 2;
}
.files { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.375rem; }
.files li { display: grid; gap: 0.125rem; }
.files code { font-size: 0.75rem; overflow-wrap: anywhere; color: var(--ink-muted); }
.facts { display: grid; gap: 0.375rem; margin: 0; }
.facts div { display: flex; flex-wrap: wrap; gap: 0.25rem 0.75rem; }
.facts dt { font-weight: 600; min-inline-size: 9rem; }
.facts dd { margin: 0; }

.foot { border-block-start: 1px solid var(--sf-outline-variant); padding-block: 1.25rem; }
.foot__row { display: grid; gap: 0.25rem; font-size: 0.875rem; color: var(--ink-muted); }

.visually-hidden { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

@media (max-width: 40rem) {
  .stage { padding: 0.5rem; gap: 1rem; }
  .demo-hero { min-block-size: 24rem; }
  .toolbar .field-group { inline-size: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}