/* Aisthesis Lab — Phase 0 landing
   Tokens consumed verbatim from .ai/design/design-system-spec.json
   No hardcoded hex, no shadow, no border-radius: radius.none and shadow:none
   are locked absences, not omissions. */

:root {
  /* color */
  --color-ground: oklch(0.97 0.008 75);
  --color-ink: oklch(0.20 0.015 75);
  --color-ink-muted: oklch(0.48 0.012 75);
  --color-border: oklch(0.82 0.01 75);
  --color-accent: oklch(0.46 0.09 232);
  --color-accent-ink: oklch(0.98 0.006 75);
  --color-state-error: oklch(0.47 0.14 27);

  /* type */
  --font-display: 'PT Serif', Georgia, 'Times New Roman', serif;
  --font-procedural: 'PT Mono', 'SF Mono', Consolas, 'Liberation Mono', monospace;

  --step-caption: 0.75rem;
  --step-body: 1rem;
  --step-lead: clamp(1rem, 0.9334rem + 0.333vw, 1.333rem);
  --step-h3: clamp(1.333rem, 1.2442rem + 0.444vw, 1.777rem);
  --step-h2: clamp(1.777rem, 1.6586rem + 0.592vw, 2.369rem);
  --step-h1: clamp(2.369rem, 2.2114rem + 0.788vw, 3.157rem);
  --step-display: clamp(3.157rem, 2.9466rem + 1.052vw, 4.209rem);

  --measure-display: 65ch;
  --measure-procedural: 50ch;

  --lh-display-large: 1.1;
  --lh-display-body: 1.3;
  --lh-body: 1.5;
  --lh-procedural: 1.6;
  --lh-caption: 1.4;

  --tracking-display: 0em;
  --tracking-procedural-body: -0.01em;
  --tracking-caption-label: 0.06em;

  /* space */
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1.125rem;
  --space-4: 1.688rem;
  --space-5: 2.531rem;
  --space-6: 3.797rem;
  --space-7: 5.696rem;

  /* surface */
  --radius-none: 0;
  --border-hairline: 1px;

  /* texture */
  --texture-opacity-max: 0.05;
  --texture-blend-mode: multiply;

  /* motion */
  --duration-reveal: 250ms;
  --duration-state: 175ms;
  --duration-instant: 0ms;
  --easing-settle: cubic-bezier(0.16, 1, 0.3, 1);
  --easing-standard: cubic-bezier(0.4, 0, 0.2, 1);

  /* layout */
  --two-track-collapse: 60rem;
  --touch-target-min: 2.75rem;

  /* runtime motion knobs, flipped by the reduced-motion media query below */
  --reveal-duration: var(--duration-reveal);
  --reveal-distance: 0.75rem;
  --state-duration: var(--duration-state);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --reveal-duration: var(--duration-instant);
    --reveal-distance: 0rem;
    --state-duration: var(--duration-instant);
  }
}

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

html { color-scheme: light; }

body {
  margin: 0;
  background: var(--color-ground);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--step-body);
  line-height: var(--lh-body);
  position: relative;
  overflow-x: hidden;
}

/* Decorative texture: faint notebook-rule grid, non-figurative, CSS-generated
   so no asset ships and no external request is made. Kept at texture.opacity-max
   with multiply blend so it never competes with real artwork. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: var(--texture-opacity-max);
  mix-blend-mode: var(--texture-blend-mode);
  background-image: repeating-linear-gradient(
    to bottom,
    var(--color-ink) 0,
    var(--color-ink) 1px,
    transparent 1px,
    transparent 2.531rem
  );
}

header, main, footer { position: relative; z-index: 1; }

img, svg { max-width: 100%; display: block; }

a { color: var(--color-accent); }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -3rem;
  left: var(--space-2);
  z-index: 10;
  background: var(--color-ink);
  color: var(--color-accent-ink);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-procedural);
  font-size: var(--step-caption);
  transition: top var(--state-duration) var(--easing-standard);
}
.skip-link:focus {
  top: var(--space-2);
}

/* ---- Header / Footer ---- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border-hairline) solid var(--color-border);
  gap: var(--space-3);
}

.wordmark {
  font-family: var(--font-procedural);
  font-size: var(--step-caption);
  letter-spacing: var(--tracking-caption-label);
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.lang-toggle {
  font-family: var(--font-procedural);
  font-size: var(--step-caption);
  letter-spacing: var(--tracking-caption-label);
  text-transform: uppercase;
  background: transparent;
  color: var(--color-ink);
  border: var(--border-hairline) solid var(--color-border);
  border-radius: var(--radius-none);
  padding: var(--space-1) var(--space-2);
  min-height: var(--touch-target-min);
  min-width: var(--touch-target-min);
  cursor: pointer;
}
.lang-toggle:hover { border-color: var(--color-accent); }

.site-footer {
  padding: var(--space-6) var(--space-4) var(--space-5);
  border-top: var(--border-hairline) solid var(--color-border);
  text-align: center;
}
/* Same size/weight/family as the hero .display treatment — the manifest
   formula is never re-styled per section, per the signature-elements lock.
   Kept as its own rule (not the .display utility class) so footer-specific
   layout (centered, contained) doesn't fight the hero's max-width/margin. */
.footer-formula {
  font-family: var(--font-display);
  font-size: var(--step-display);
  line-height: var(--lh-display-large);
  letter-spacing: var(--tracking-display);
  max-width: var(--measure-display);
  margin: 0 auto var(--space-3);
}
.footer-wordmark {
  font-family: var(--font-procedural);
  font-size: var(--step-caption);
  letter-spacing: var(--tracking-caption-label);
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: 0;
}

/* ---- Sections / layout primitives ---- */

.section {
  padding: var(--space-6) var(--space-4);
  max-width: 90rem;
  margin-inline: auto;
}

.container-display {
  max-width: var(--measure-display);
}

.container-procedural {
  max-width: var(--measure-procedural);
}

.procedural-voice {
  font-family: var(--font-procedural);
  font-size: var(--step-body);
  line-height: var(--lh-procedural);
  letter-spacing: var(--tracking-procedural-body);
}
.procedural-voice p { margin: 0 0 var(--space-3); }
.procedural-voice p:last-child { margin-bottom: 0; }

.caption-label {
  font-family: var(--font-procedural);
  font-size: var(--step-caption);
  letter-spacing: var(--tracking-caption-label);
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-3);
}

/* Manifesto: the one focal entry point, generous whitespace */
.section--manifesto {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}
.display {
  font-family: var(--font-display);
  font-size: var(--step-display);
  line-height: var(--lh-display-large);
  letter-spacing: var(--tracking-display);
  margin: 0 0 var(--space-6);
  max-width: var(--measure-display);
}
.body-text {
  font-family: var(--font-display);
  font-size: var(--step-lead);
  line-height: var(--lh-display-body);
  margin: 0 0 var(--space-4);
}
.body-text:last-child { margin-bottom: 0; }

h2 {
  font-family: var(--font-display);
  font-size: var(--step-h2);
  line-height: var(--lh-display-body);
  letter-spacing: var(--tracking-display);
  margin: 0 0 var(--space-4);
}

.lead {
  font-family: var(--font-display);
  font-size: var(--step-lead);
  line-height: var(--lh-display-body);
  margin: 0 0 var(--space-4);
}

/* Placard: the recurring label module */
.placard {
  border-top: var(--border-hairline) solid var(--color-border);
  padding-top: var(--space-3);
  margin-top: var(--space-5);
  border-radius: var(--radius-none);
}
.placard__caption {
  font-family: var(--font-procedural);
  font-size: var(--step-caption);
  letter-spacing: var(--tracking-caption-label);
  text-transform: uppercase;
  color: var(--color-ink-muted);
  line-height: var(--lh-caption);
  margin: 0 0 var(--space-3);
}
.placard__list {
  font-family: var(--font-procedural);
  font-size: var(--step-body);
  line-height: var(--lh-procedural);
  letter-spacing: var(--tracking-procedural-body);
  margin: 0;
  padding-left: var(--space-4);
}
.placard__list li { margin-bottom: var(--space-2); }
.placard__list li:last-child { margin-bottom: 0; }

.placard--section {
  border-top-width: var(--border-hairline);
  padding: var(--space-5) var(--space-4);
  border: var(--border-hairline) solid var(--color-border);
  border-radius: var(--radius-none);
  margin-top: var(--space-6);
}

/* What it is / is not: two adjacent placards, contrasted by density,
   container query (not viewport) since this pair renders in varied contexts */
.wiin-pair {
  container-type: inline-size;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
@container (min-width: 40rem) {
  .wiin-pair { grid-template-columns: 1fr 1fr; }
}

/* ---- Waitlist form: the one composition break ---- */

.section--waitlist {
  border: var(--border-hairline) solid var(--color-accent);
  border-radius: var(--radius-none);
  padding: var(--space-6) var(--space-5);
  margin-top: var(--space-7);
  margin-bottom: var(--space-7);
}

.waitlist-form {
  max-width: var(--measure-procedural);
  margin-top: var(--space-5);
}

.field { margin-bottom: var(--space-4); }

.waitlist-form label {
  display: block;
  font-family: var(--font-procedural);
  font-size: var(--step-caption);
  letter-spacing: var(--tracking-caption-label);
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-2);
}

.waitlist-form input[type="email"],
.waitlist-form input[type="text"] {
  width: 100%;
  font-family: var(--font-procedural);
  font-size: var(--step-body);
  letter-spacing: var(--tracking-procedural-body);
  color: var(--color-ink);
  background: var(--color-ground);
  border: var(--border-hairline) solid var(--color-border);
  border-radius: var(--radius-none);
  padding: var(--space-2) var(--space-3);
  min-height: var(--touch-target-min);
  transition: border-color var(--state-duration) var(--easing-standard);
}
.waitlist-form input:focus { border-color: var(--color-accent); }
.waitlist-form input[aria-invalid="true"] { border-color: var(--color-state-error); }
.waitlist-form input:disabled { color: var(--color-ink-muted); }

.cluster {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  min-height: var(--touch-target-min);
}
.field-consent label {
  display: inline;
  text-transform: none;
  font-size: var(--step-caption);
  letter-spacing: 0;
  color: var(--color-ink);
  flex: 1 1 16rem;
}
.waitlist-form input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  min-width: 1.25rem;
  accent-color: var(--color-accent);
  border: var(--border-hairline) solid var(--color-border);
  border-radius: var(--radius-none);
}

.field-error {
  font-family: var(--font-procedural);
  font-size: var(--step-caption);
  letter-spacing: var(--tracking-caption-label);
  color: var(--color-state-error);
  margin: var(--space-2) 0 0;
}

.waitlist-form button[type="submit"] {
  font-family: var(--font-procedural);
  font-size: var(--step-body);
  letter-spacing: var(--tracking-caption-label);
  text-transform: uppercase;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border: none;
  border-radius: var(--radius-none);
  padding: var(--space-2) var(--space-4);
  min-height: var(--touch-target-min);
  min-width: var(--touch-target-min);
  cursor: pointer;
  transition: opacity var(--state-duration) var(--easing-standard);
}
.waitlist-form button[type="submit"]:hover:not(:disabled) { opacity: 0.85; }
.waitlist-form button[type="submit"]:active:not(:disabled) { opacity: 0.7; }
.waitlist-form button[type="submit"]:disabled {
  background: var(--color-border);
  color: var(--color-ink-muted);
  cursor: not-allowed;
}

.form-status {
  font-family: var(--font-procedural);
  font-size: var(--step-caption);
  color: var(--color-ink-muted);
  margin-top: var(--space-3);
  min-height: 1.4em;
}

.waitlist-form[data-state="loading"] { opacity: 0.85; }

.waitlist-success {
  max-width: var(--measure-procedural);
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  border-top: var(--border-hairline) solid var(--color-accent);
}

.micro {
  font-family: var(--font-procedural);
  font-size: var(--step-caption);
  color: var(--color-ink-muted);
  max-width: var(--measure-procedural);
  margin-top: var(--space-5);
}

/* ---- Atlas: two-track editorial, artwork wider and offset ---- */

/* two-track-editorial: text column at reading measure, artwork track
   >=20rem and wider/offset, genuine grid siblings (not a single item
   floating in an empty grid). Collapses to a single stacked column
   (image, then caption, in that DOM order) below the collapse token. */
.two-track {
  display: grid;
  grid-template-columns: minmax(18rem, 1fr) minmax(20rem, 1.6fr);
  gap: var(--space-6);
  align-items: start;
  margin: var(--space-7) 0 0;
  container-type: inline-size;
}
.two-track .artwork-plate__frame { grid-column: 2; grid-row: 1; }
.two-track .placard--caption { grid-column: 1; grid-row: 1; margin-top: 0; }
.two-track--reverse .artwork-plate__frame { grid-column: 1; }
.two-track--reverse .placard--caption { grid-column: 2; }

@media (max-width: 60rem) {
  .two-track {
    grid-template-columns: 1fr;
  }
  .two-track .artwork-plate__frame,
  .two-track .placard--caption,
  .two-track--reverse .artwork-plate__frame,
  .two-track--reverse .placard--caption {
    grid-column: 1;
  }
  .two-track .artwork-plate__frame { grid-row: 1; }
  .two-track .placard--caption { grid-row: 2; margin-top: var(--space-3); }
}

.artwork-plate__frame {
  aspect-ratio: 4 / 5;
  border: var(--border-hairline) solid var(--color-border);
  border-radius: var(--radius-none);
  background:
    repeating-linear-gradient(
      135deg,
      var(--color-border) 0,
      var(--color-border) 1px,
      transparent 1px,
      transparent 0.75rem
    );
  background-color: var(--color-ground);
}
.placard--caption {
  align-self: start;
}
/* Placard/ArtworkPlate caption position responds to the component's own
   container inline size (container query), not the page viewport. */
@container (min-width: 24rem) {
  .placard--caption { padding-top: var(--space-1); }
}

.section--atlas { padding-bottom: var(--space-7); }

/* ---- Scroll reveal: settle, not score. Fires once, opacity-only under
   reduced motion (no transform token substituted, per motion-tokens). ---- */
.reveal {
  opacity: 0;
  transform: translateY(var(--reveal-distance));
  transition: opacity var(--reveal-duration) var(--easing-settle),
              transform var(--reveal-duration) var(--easing-settle);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
/* No-JS / JS-not-yet-run fallback: never hide content permanently. */
.no-js .reveal { opacity: 1; transform: none; }

/* ---- Manifesto CTA: link into the First Look flow ---- */
.cta-link {
  display: inline-block;
  font-family: var(--font-procedural);
  font-size: var(--step-body);
  letter-spacing: var(--tracking-caption-label);
  text-transform: uppercase;
  color: var(--color-ink);
  border: var(--border-hairline) solid var(--color-accent);
  border-radius: var(--radius-none);
  padding: var(--space-2) var(--space-4);
  min-height: var(--touch-target-min);
  text-decoration: none;
  transition: background var(--state-duration) var(--easing-standard),
              color var(--state-duration) var(--easing-standard);
}
.cta-link:hover {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

/* ---- Responsive: no horizontal scroll at any width, fluid measure ---- */
@media (max-width: 30rem) {
  .section { padding-inline: var(--space-3); }
  .site-header { padding-inline: var(--space-3); }
}


/* ---- Atlas ready state: mounted plate with real PD/CC0 artwork ---- */
.artwork-plate[data-state="ready"] .artwork-plate__frame {
  background: var(--color-ground);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.artwork-plate__frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}