/* ===========================================================
   Primis — Landing
   World Labs orientation: warm off-white, refined serif display,
   centered nav, single dark pill CTA, slide-style sections.
   =========================================================== */

:root {
  /* Surface */
  --bg:            #eff0f2;     /* warm-cool off-white */
  --bg-elev:       #f6f6f7;
  --bg-soft:       #e8e9eb;

  /* Ink */
  --ink:           #181a1d;     /* near-black */
  --ink-2:         #2c2e33;
  --ink-mute:      #6a6d75;
  --ink-faint:     #9a9da4;
  --ink-line:      #d8d9dc;

  /* Accent — muted lavender-grey for serif secondary line */
  --accent:        #a8a3b3;
  --accent-deep:   #7a7588;

  /* Pill — dark grey */
  --pill-bg:       #3a3c41;
  --pill-bg-hov:   #4a4c52;
  --pill-fg:       #f4f4f5;

  /* Typography */
  --serif: "Source Serif 4", "Source Serif Pro", "Iowan Old Style", "Apple Garamond", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  --ui:    "Manrope", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Layout */
  --pad-x: clamp(28px, 5vw, 88px);
  --pad-y: clamp(72px, 12vh, 160px);
  --maxw:  1440px;
  --radius: 14px;

  /* Motion */
  --ease: cubic-bezier(.2,.7,.2,1);
}

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

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

html { scroll-behavior: smooth; }
body { overflow-x: hidden; }

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

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

/* ----------- NAV ----------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(24px, 4vw, 56px);
  padding: 30px 24px 30px 40px;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  font-family: var(--ui);
}

.nav__right {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.6vw, 32px);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-family: var(--ui);
  font-weight: 600;
  letter-spacing: -0.015em;
}
.nav__mark { color: var(--ink); width: 20px; height: 28px; }
.nav__word {
  font-size: 23px;
  font-weight: 600;
  letter-spacing: -0.018em;
}

.nav__links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(18px, 2.4vw, 28px);
}
.nav__links a {
  color: var(--ink);
  font-family: var(--ui);
  font-size: 15.5px;
  font-weight: 400;
  letter-spacing: -0.008em;
  transition: color .2s var(--ease);
}
.nav__links a:hover { color: var(--ink-mute); }

.nav__cta { display: flex; justify-content: flex-end; }

/* ----------- PILL CTA ----------- */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  background: var(--pill-bg);
  color: var(--pill-fg);
  font-family: var(--ui);
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: -0.008em;
  transition: background .2s var(--ease), transform .2s var(--ease);
}
.pill:hover { background: var(--pill-bg-hov); transform: translateY(-1px); }
.pill--lg { padding: 14px 28px; font-size: 16.5px; }

.link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 14.5px;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.link:hover { border-color: var(--ink); }
.link--lg { font-size: 15.5px; }

/* ----------- SLIDE SHELL ----------- */

.slide {
  position: relative;
  min-height: calc(100vh - 0px);
  padding: var(--pad-y) var(--pad-x);
  display: flex;
  align-items: flex-end;
  border-bottom: 1px solid color-mix(in oklab, var(--ink-line) 50%, transparent);
  isolation: isolate;
}

.slide__body {
  width: min(100%, 980px);
  max-width: 980px;
}
.slide__body--wide { width: 100%; max-width: 100%; }

/* Slide corners — hidden */
.slide__corner { display: none; }

/* HERO variant — single statement on first page */
.slide--hero {
  min-height: 100vh;
  align-items: flex-start;
  padding-top: clamp(24px, 4vh, 56px);
  padding-bottom: clamp(40px, 6vh, 80px);
  padding-left: clamp(56px, 8vw, 140px);
  padding-right: clamp(40px, 6vw, 100px);
}

.hero__body {
  width: 100%;
  max-width: 1100px;
}

.hero__headline {
  font-family: var(--ui);
  font-weight: 600;
  font-size: clamp(26px, 3vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 22px;
  color: var(--ink);
  max-width: 720px;
}
.hero__headline-line { display: block; }
.hero__headline-line--muted {
  font-weight: 400;
  color: var(--accent);
}

.hero__signature {
  font-family: var(--ui);
  font-size: clamp(16px, 1.5vw, 22px);
  font-weight: 500;
  letter-spacing: -0.008em;
  text-transform: none;
  color: var(--ink);
  margin-bottom: 20px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  line-height: 1;
}
.hero__signature::before {
  content: "";
  display: inline-block;
  width: 18px; height: 1px;
  background: var(--ink);
}

.hero__desc {
  font-family: var(--sans);
  font-size: clamp(15.5px, 1.15vw, 17.5px);
  line-height: 1.6;
  color: var(--ink-mute);
  margin: 0;
  max-width: 420px;
  font-weight: 400;
}

@media (max-width: 980px) {
  .slide--hero {
    padding-left: clamp(24px, 6vw, 56px);
    padding-right: clamp(24px, 6vw, 56px);
  }
}

/* ----------- DISPLAY TYPE ----------- */

.display {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(64px, 11vw, 168px);
  line-height: 0.92;
  letter-spacing: -0.02em;
  margin: 0 0 28px;
  color: var(--ink);
}
.display--md {
  font-size: clamp(43px, 6.2vw, 92px);
  line-height: 0.96;
  letter-spacing: -0.018em;
  margin-bottom: 36px;
}
.display__line {
  display: block;
}
.display__line--muted {
  color: var(--accent);
}
.display em {
  font-style: italic;
  font-weight: 400;
}

.lede {
  font-family: var(--sans);
  font-size: clamp(15.5px, 1.15vw, 18px);
  line-height: 1.55;
  color: var(--ink-mute);
  max-width: 580px;
  margin: 0;
  font-weight: 400;
}
.lede em { color: var(--ink-2); font-style: italic; }
.lede--sm {
  font-size: clamp(14.5px, 1vw, 16.5px);
  max-width: 620px;
}

.kicker {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 28px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--ink-mute);
  display: inline-block;
}

/* ----------- PIPELINE STEPS ----------- */

.steps {
  list-style: none;
  margin: 56px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px 56px;
  max-width: 980px;
}
.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding-top: 22px;
  border-top: 1px solid var(--ink-line);
}
.steps__num {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--accent-deep);
  padding-top: 4px;
}
.steps h3 {
  margin: 0 0 6px;
  font-family: var(--sans);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.steps p {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-mute);
  line-height: 1.55;
}

/* ----------- COMPARE ----------- */

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
  max-width: 980px;
}
.compare__col {
  background: var(--bg-elev);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  padding: 30px 30px 32px;
}
.compare__col--us {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.compare__head {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 22px;
}
.compare__head--us { color: color-mix(in oklab, var(--bg) 70%, transparent); }
.compare__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.compare__col li {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 300;
  line-height: 1.45;
  letter-spacing: -0.005em;
  color: var(--ink-2);
}
.compare__col--us li { color: color-mix(in oklab, var(--bg) 92%, transparent); }

/* ----------- WORLDS ----------- */

.worlds {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 56px;
}
@media (max-width: 760px) { .worlds { grid-template-columns: 1fr; } }
.world {
  display: flex;
  flex-direction: column;
  gap: 14px;
  cursor: pointer;
}
.world__visual {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius);
  background: var(--bg-elev);
  overflow: hidden;
  border: 1px solid var(--ink-line);
  isolation: isolate;
}
.world__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 50% 110%, color-mix(in oklab, var(--accent) 24%, transparent), transparent 60%),
    radial-gradient(60% 60% at 30% 30%, color-mix(in oklab, #ffffff 40%, transparent), transparent 70%);
  pointer-events: none;
}
.world__visual[data-world="atrium"] {
  background:
    linear-gradient(180deg, #e7e6e2 0%, #d8d6d0 100%);
}
.world__visual[data-world="loft"] {
  background:
    linear-gradient(180deg, #d9d9dc 0%, #b9b8be 100%);
}
.world__visual[data-world="forest"] {
  background:
    linear-gradient(180deg, #d9dfd6 0%, #aab1a4 100%);
}
.world__visual[data-world="street"] {
  background:
    linear-gradient(180deg, #e3dbd2 0%, #c2b6a8 100%);
}
.world__visual canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.world__meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.world__name {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.world__stat {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
}
.world:hover .world__visual {
  border-color: var(--ink-2);
}

/* ----------- USES ----------- */

.uses {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px 48px;
  margin-top: 56px;
  max-width: 980px;
}
.use {
  padding-top: 22px;
  border-top: 1px solid var(--ink-line);
}
.use__head {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  color: var(--ink);
}
.use p {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-mute);
  line-height: 1.55;
}

/* ----------- CTA ROW ----------- */

.cta-row {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.slide--cta { background: var(--bg); }

/* ----------- ABOUT slide ----------- */
.slide--about { align-items: center; }
.slide--about .slide__body { max-width: 1080px; }

.about__display {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(36px, 5vw, 74px);
  line-height: 1.1;
  letter-spacing: -0.018em;
  color: var(--ink);
  margin: 0 0 36px;
}
.about__display span { display: block; }
.about__display span:nth-child(2),
.about__display span:nth-child(3) { color: var(--accent); }
.about__display em {
  font-style: italic;
  color: var(--ink);
  font-weight: 400;
}

.about__lede {
  font-family: var(--sans);
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.6;
  color: var(--ink-mute);
  margin: 0 0 36px;
  max-width: 620px;
  font-weight: 400;
}

.about__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--ui);
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 4px;
  transition: gap .2s var(--ease);
}
.about__link:hover { gap: 14px; }

/* ----------- FOOTER ----------- */

.footer {
  padding: 72px var(--pad-x) 36px;
  background: var(--bg);
  border-top: 1px solid var(--ink-line);
}
.footer__row {
  display: flex;
  justify-content: space-between;
  gap: 48px;
}
.footer__row--top { align-items: flex-start; flex-wrap: wrap; }
.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(140px, 1fr));
  gap: 56px;
}
.footer__head {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 14px;
}
.footer__cols a {
  display: block;
  font-size: 14.5px;
  color: var(--ink-2);
  padding: 4px 0;
  transition: color .2s var(--ease);
}
.footer__cols a:hover { color: var(--ink); }

.footer__row--bot {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--ink-line);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ----------- ENTRANCE ----------- */

.display__line,
.kicker,
.lede,
.steps li,
.compare__col,
.world,
.use,
.cta-row {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
.is-in .display__line,
.is-in .kicker,
.is-in .lede,
.is-in .steps li,
.is-in .compare__col,
.is-in .world,
.is-in .use,
.is-in .cta-row {
  opacity: 1;
  transform: none;
}
.is-in .display__line:nth-child(2) { transition-delay: .12s; }
.is-in .lede               { transition-delay: .18s; }
.is-in .steps li:nth-child(1) { transition-delay: .15s; }
.is-in .steps li:nth-child(2) { transition-delay: .22s; }
.is-in .steps li:nth-child(3) { transition-delay: .29s; }
.is-in .steps li:nth-child(4) { transition-delay: .36s; }
.is-in .compare__col--us   { transition-delay: .12s; }
.is-in .world:nth-child(2) { transition-delay: .08s; }
.is-in .world:nth-child(3) { transition-delay: .16s; }
.is-in .world:nth-child(4) { transition-delay: .24s; }
.is-in .use:nth-child(2)   { transition-delay: .08s; }
.is-in .use:nth-child(3)   { transition-delay: .16s; }
.is-in .use:nth-child(4)   { transition-delay: .24s; }

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

/* ----------- RESPONSIVE ----------- */

@media (max-width: 900px) {
  .nav { grid-template-columns: auto auto; }
  .nav__links { display: none; }
  .nav__cta { justify-content: flex-end; }

  .steps,
  .compare,
  .uses { grid-template-columns: 1fr; }

  .worlds { grid-template-columns: repeat(2, 1fr); }

  .footer__row--top { flex-direction: column; }
  .footer__cols { grid-template-columns: repeat(3, 1fr); gap: 24px; }
}

@media (max-width: 560px) {
  .worlds { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: 1fr 1fr; }
}