/* ============================================================================
   G&A Tech · page styles, v2
   The page is a duet: night navy for Gabriel's side (code), mist grey-blue for
   Arthur's side (design), split by one seam. The two only mix once, at the
   end, into slate. Motion vocabulary: expo-out for arrivals, masks for type,
   the seam as the origin of every wipe and sweep.
   ========================================================================== */

:root {
  /* palette: five blues and a grey that leans blue */
  --night:   #0A1122;   /* Gabriel's ground */
  --night-2: #111B31;   /* raised on night */
  --night-3: #1A2742;
  --mist:    #DFE3EA;   /* Arthur's ground */
  --mist-2:  #D2D8E1;   /* tonal on mist */
  --paper:   #EDF0F5;
  --slate:   #19243A;   /* night mixed with mist: only after the fusion */
  --ice:     #EEF1F7;   /* ink on dark */
  --ice-soft:#97A4BD;
  --ink:     #0A1122;   /* ink on light */
  --ink-soft:#4B5874;
  --royal:   #2B4BD8;   /* accent on light */
  --royal-l: #8AA6FF;   /* the same hue, lifted for dark */
  --steel:   #5E7196;

  --sc-canvas: #0A1122;
  --sc-surface: #111B31;
  --sc-ink: #EEF1F7;
  --sc-ink-soft: #97A4BD;
  --sc-accent: #8AA6FF;
  --sc-accent-ink: #0A1122;
  --sc-font-display: "Bodoni Moda", "Didot", "Bodoni 72", Georgia, serif;
  --sc-font-text: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --sc-font-mono: "Geist Mono", ui-monospace, "Cascadia Mono", monospace;
  --sc-shadow-color: 222 58% 5%;
  --sc-track-tight: -0.024em;
  --sc-track-snug: -0.012em;

  --expo: cubic-bezier(0.16, 1, 0.3, 1);
  --quart: cubic-bezier(0.25, 1, 0.5, 1);

  --line: color-mix(in oklab, var(--ice) 13%, transparent);
  --gap: clamp(2.25rem, 5vw, 6rem);   /* half of the seam gutter */
  --bar-h: 64px;
  --seam: 0.5;
  --bar-seam: 0.5;
  --mix: 0;
}

/* Arthur's side: dark ink on the light ground. Restate `color` with the token,
   or already-inherited text keeps the navy side's ink. */
.duo__a, .method__col--a, .bar__a-side, .fuse__half--a,
.hero__line--a, .hero__cross--a, .hero__meta--a {
  --sc-ink: var(--ink);
  --sc-ink-soft: var(--ink-soft);
  --sc-accent: var(--royal);
  --sc-accent-ink: #fff;
  --line: color-mix(in oklab, var(--ink) 15%, transparent);
  color: var(--sc-ink);
}

/* Lenis */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

body { background: var(--night); }
.sc-display { font-weight: 500; font-optical-sizing: auto; }
.sc-display em, .turn em, .hero__cross em, .close__title em { font-style: italic; color: var(--sc-accent); }
.sc-body { color: var(--sc-ink-soft); }
.sc-grain { z-index: 58; opacity: 0.055; }
::selection { background: var(--royal); color: #fff; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: fixed; left: 1rem; top: 0.75rem; z-index: 100;
  background: var(--ice); color: var(--ink); padding: 0.6rem 1rem; border-radius: 999px;
  transform: translateY(-160%); transition: transform var(--sc-d-fast) var(--sc-ease-out);
}
.skip:focus-visible { transform: none; }

.kicker {
  display: flex; align-items: center; gap: 0.6rem; margin: 0 0 var(--sc-5);
  font-size: var(--sc-t-xs); letter-spacing: 0.18em; text-transform: uppercase; font-weight: 500;
  color: var(--sc-ink-soft);
}
.kicker::before { content: ""; width: 1.6rem; height: 1px; background: currentColor; opacity: 0.7; }
.kicker--ghost::before { display: none; }

/* ------------------------------------------------------ text roll (hover) */
.roll { position: relative; display: inline-flex; overflow: hidden; vertical-align: top; }
.roll > span { display: block; transition: transform 520ms var(--expo); }
.roll > span + span { position: absolute; inset: 0; transform: translateY(105%); }
@media (hover: hover) and (pointer: fine) {
  .roll:hover > span:first-child { transform: translateY(-105%); }
  .roll:hover > span + span { transform: none; }
}

/* ------------------------------------------------------------------ bar -- */
.bar {
  position: fixed; inset: 0 0 auto 0; height: var(--bar-h); z-index: 60;
  display: grid; grid-template-columns: calc(var(--bar-seam) * 100%) 1fr;
  font-size: var(--sc-t-sm);
  transition: transform 700ms var(--expo);
}
.bar.is-hidden { transform: translateY(-101%); }
.bar__ground, .bar__ground i { position: absolute; inset: 0; display: block; }
.bar__g { background: var(--night); clip-path: inset(0 calc((1 - var(--bar-seam)) * 100%) 0 0); }
.bar__a { background: var(--mist); clip-path: inset(0 0 0 calc(var(--bar-seam) * 100%)); }
.bar__mix { background: var(--slate); clip-path: inset(0 calc((1 - var(--mix)) * 50%)); }
.bar__g::after, .bar__a::after { content: ""; position: absolute; inset: auto 0 0 0; height: 1px; background: var(--line); }
.bar__a::after { background: color-mix(in oklab, var(--ink) 11%, transparent); }
.bar__g-side, .bar__a-side {
  position: relative; display: flex; align-items: center; gap: var(--sc-6);
  padding-inline: var(--sc-gutter) var(--sc-5);
}
.bar__g-side { justify-content: space-between; }
.bar__a-side { justify-content: flex-end; padding-inline: var(--sc-5) var(--sc-gutter); }
.bar__nav { display: flex; gap: var(--sc-6); }
.bar a:not(.btn) { text-decoration: none; color: var(--sc-ink); }
html.is-mixed .bar__a-side { --sc-ink: var(--ice); --sc-ink-soft: var(--ice-soft); --sc-accent: var(--royal-l); --sc-accent-ink: var(--night); color: var(--ice); }

.mark { display: inline-flex; align-items: baseline; gap: 0.5rem; }
.mark__ga { font-family: var(--sc-font-display); font-size: 1.55rem; font-weight: 500; letter-spacing: -0.01em; line-height: 1; }
.mark__ga em { color: var(--royal-l); font-style: italic; font-size: 0.92em; margin-inline: 0.02em; }
.mark__tech { font-size: 0.66rem; letter-spacing: 0.36em; text-transform: uppercase; font-weight: 500; }

/* --------------------------------------------------------------- buttons -- */
.btn {
  position: relative; isolation: isolate; overflow: hidden;
  display: inline-flex; align-items: center; gap: 0.55rem; white-space: nowrap;
  border-radius: 999px; text-decoration: none; font-weight: 500;
  background: var(--sc-accent); color: var(--sc-accent-ink);
  transition: transform 160ms var(--sc-ease-out), box-shadow 240ms var(--sc-ease-out);
  box-shadow: var(--sc-e1);
}
/* the fill sweeps in from the seam side: left to right */
.btn::before {
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit;
  background: color-mix(in oklab, var(--sc-accent) 76%, white);
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform 600ms var(--expo);
}
.btn__arr { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; transition: transform 500ms var(--expo); }
.btn:active { transform: scale(0.97); }
.btn--bar { padding: 0.55rem 1rem 0.55rem 1.15rem; font-size: var(--sc-t-sm); }
.btn--primary { padding: 1rem 1.35rem 1rem 1.6rem; font-size: var(--sc-t-base); box-shadow: var(--sc-e2); }
.btn__via { font-weight: 400; opacity: 0.72; font-size: 0.86em; margin-left: 0.2rem; }
@media (hover: hover) and (pointer: fine) {
  .btn:hover::before { transform: scaleX(1); }
  .btn:hover .btn__arr { transform: translateX(3px); }
  .btn:hover { box-shadow: var(--sc-e2); }
}

/* --------------------------------------------------------------- the seam -- */
.seam {
  position: fixed; z-index: 55; top: 50%;
  left: calc(var(--bar-seam) * 100%);
  transform: translate(-50%, -50%);
  opacity: var(--seam-o, 0); pointer-events: none;
}
.seam.is-live { pointer-events: auto; }
.seam:not(.is-live) { visibility: hidden; }   /* not focusable while invisible */
.seam__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; }
.seam__list a {
  position: relative; display: grid; place-items: center; width: 28px; height: 28px;
  border-radius: 999px; text-decoration: none;
}
.seam__list a::before {
  content: ""; width: 6px; height: 6px; border-radius: 999px;
  background: var(--night); box-shadow: 0 0 0 1.5px var(--royal-l);
  transition: transform 300ms var(--expo);
}
.seam__list a span {
  position: absolute; left: calc(100% + 0.5rem); top: 50%; translate: 0 -50%;
  white-space: nowrap; font-size: var(--sc-t-xs); letter-spacing: 0.02em;
  background: var(--night); color: var(--ice); padding: 0.3rem 0.65rem; border-radius: 999px;
  opacity: 0; transform: translateX(-6px); pointer-events: none;
  transition: opacity 200ms var(--sc-ease-out), transform 420ms var(--expo);
}
.seam__list a:hover span, .seam__list a:focus-visible span { opacity: 1; transform: none; }
.seam__list a:hover::before { transform: scale(1.5); }
.seam__amp {
  position: absolute; left: 50%; top: 0; width: 28px; height: 28px; margin-left: -14px;
  display: grid; place-items: center; pointer-events: none;
  font-family: var(--sc-font-display); font-style: italic; font-size: 1.45rem; line-height: 1;
  color: #fff; background: var(--royal); border-radius: 999px;
  transform: translateY(var(--seam-y, 0px));
  transition: transform 700ms var(--expo);
  box-shadow: var(--sc-e2);
}

/* -------------------------------------------------------- the ampersand -- */
.amp3d {
  position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: 50;
  pointer-events: none;
}
.amp-shadow {
  position: fixed; left: 0; top: 0; z-index: 49; pointer-events: none;
  width: 100px; height: 24px; border-radius: 50%;
  background: radial-gradient(closest-side, hsl(222 60% 4% / 0.55), hsl(222 60% 4% / 0.22) 55%, transparent);
  filter: blur(6px); opacity: 0; will-change: transform, opacity;
}
.amp-dom {
  position: fixed; left: 0; top: 0; z-index: 50; pointer-events: none; display: none;
  font-family: var(--sc-font-display); font-style: italic; font-weight: 500; line-height: 1;
  color: var(--royal-l); transform-origin: 0 0; will-change: transform, opacity;
}
html.no-webgl .amp3d { display: none; }
html.no-webgl .amp-dom { display: block; }

/* shared two-ground layer inside pinned stages. Each ground carries a soft
   light that falls from the seam, so neither half is a flat fill. */
.halves, .halves i { position: absolute; inset: 0; display: block; }
.halves__g {
  background: radial-gradient(70% 90% at 100% 45%, #13203D 0%, transparent 70%), var(--night);
  clip-path: inset(0 calc((1 - var(--seam)) * 100%) 0 0);
}
.halves__a {
  background: radial-gradient(70% 90% at 0% 45%, #ECEFF4 0%, transparent 70%), var(--mist);
  clip-path: inset(0 0 0 calc(var(--seam) * 100%));
}
/* the mix blooms out of the seam's centre, soft-edged, like ink in water */
.halves__mix {
  background: radial-gradient(80% 80% at 50% 50%, #1E2B45 0%, transparent 75%), var(--slate);
  -webkit-mask-image: radial-gradient(circle at 50% 52%, #000 calc(var(--mix) * 120vmax - 14vmax), transparent calc(var(--mix) * 120vmax));
          mask-image: radial-gradient(circle at 50% 52%, #000 calc(var(--mix) * 120vmax - 14vmax), transparent calc(var(--mix) * 120vmax));
}

/* ================================================================== INTRO == */
/* Plays once on load: the seam draws, the letters rise, the ampersand turns
   in, then the chrome and the lines arrive. Skipped under reduced motion. */
html.is-loading .intro-hide { opacity: 0; }
html.is-loading .bar { transform: translateY(-101%); }
html.is-loading .hero__li { transform: translateY(18%) scale(0.96); opacity: 0; }
html.is-loading .hero__seam { transform: scaleY(0); }
html.is-loading .hero__plane--near .frag, html.is-loading .ghost { opacity: 0; }
.hero__li { display: inline-block; transition: transform 1500ms var(--expo), opacity 900ms var(--sc-ease-out); }
.hero__letter--a .hero__li { transition-delay: 120ms; }
.hero__seam { transition: transform 1100ms var(--expo); }
html.is-intro .intro-hide { transition: opacity 900ms var(--sc-ease-out) 900ms; }
html.is-intro .bar { transition: transform 1000ms var(--expo) 700ms; }
html.is-intro .hero__plane--near .frag { transition: opacity 1200ms var(--sc-ease-out) 1000ms; }
html.is-intro .ghost { transition: opacity 1600ms var(--sc-ease-out) 500ms; }

/* ================================================================== HERO == */
/* Pinned sections paint the same two grounds, so a sub-pixel gap between
   sections never shows the body colour as a line. */
.hero, .method, .fuse { background: linear-gradient(90deg, var(--night) 50%, var(--mist) 50%); }

.hero__stage { --fs: min(62vh, 34vw); }
.hero__seam {
  position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; margin-left: -0.5px; z-index: 1;
  background: linear-gradient(to bottom, transparent, color-mix(in oklab, var(--royal-l) 55%, transparent) 30%, color-mix(in oklab, var(--royal-l) 55%, transparent) 70%, transparent);
  transform-origin: 50% 50%;
}
.hero__plane { position: absolute; inset: 0; pointer-events: none; will-change: transform; }
.grid { position: absolute; top: 0; bottom: 0; width: 50%; }
.grid--g {
  left: 0;
  background-image:
    linear-gradient(color-mix(in oklab, var(--ice) 6%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in oklab, var(--ice) 6%, transparent) 1px, transparent 1px);
  background-size: 56px 56px;
  background-position: right -1px top -1px;
  -webkit-mask-image: radial-gradient(90% 80% at 100% 50%, #000 20%, transparent 78%);
          mask-image: radial-gradient(90% 80% at 100% 50%, #000 20%, transparent 78%);
}
.grid--a {
  right: 0;
  background-image:
    repeating-linear-gradient(90deg, color-mix(in oklab, var(--ink) 8%, transparent) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, color-mix(in oklab, var(--ink) 4.5%, transparent) 0 1px, transparent 1px 24px);
  -webkit-mask-image: radial-gradient(90% 80% at 0% 50%, #000 20%, transparent 78%);
          mask-image: radial-gradient(90% 80% at 0% 50%, #000 20%, transparent 78%);
}
/* ghost letters: an outlined echo, larger, further away, slower */
.ghost {
  position: absolute; top: 50%; line-height: 0.8; font-family: var(--sc-font-display); font-weight: 500;
  font-size: calc(var(--fs) * 1.5); color: transparent; margin-top: calc(var(--fs) * -0.62);
}
.ghost--g { right: calc(50% + var(--fs) * 0.18); -webkit-text-stroke: 1px color-mix(in oklab, var(--ice) 9%, transparent); }
.ghost--a { left: calc(50% + var(--fs) * 0.2); -webkit-text-stroke: 1px color-mix(in oklab, var(--ink) 10%, transparent); }

.hero__meta {
  position: absolute; top: calc(var(--bar-h) + 1.4rem); margin: 0; z-index: 3;
  display: flex; align-items: center; gap: 0.6rem;
  font-size: var(--sc-t-xs); letter-spacing: 0.18em; text-transform: uppercase; font-weight: 500;
  color: var(--sc-ink-soft);
}
.hero__meta--g { right: calc(50% + 1.4rem); }
.hero__meta--a { left: calc(50% + 1.4rem); }
.hero__meta-dot { width: 5px; height: 5px; border-radius: 99px; background: var(--sc-accent); }

.hero__lockup { position: absolute; inset: 0; margin: 0; pointer-events: none; font-weight: 500; }
.hero__letter {
  position: absolute; top: 47%;
  font-family: var(--sc-font-display); font-size: var(--fs); line-height: 0.8;
  font-weight: 500; letter-spacing: 0; will-change: transform, opacity;
  margin-top: calc(var(--fs) * -0.36);
}
.hero__letter--g { right: calc(50% + var(--fs) * 0.29); color: var(--ice); transform-origin: 100% 50%; }
.hero__letter--a { left: calc(50% + var(--fs) * 0.3); color: var(--ink); transform-origin: 0 50%; }
.hero__tech {
  position: absolute; right: 0.02em; top: calc(100% + 0.06em);
  font-family: var(--sc-font-text); font-size: 0.04em; font-weight: 500;
  letter-spacing: 0.44em; margin-right: -0.44em; text-transform: uppercase; line-height: 1;
}

.frag { position: absolute; display: block; }
.frag--code { font-family: var(--sc-font-mono); color: color-mix(in oklab, var(--ice) 48%, transparent); white-space: nowrap; }
.frag--draw { fill: none; stroke: color-mix(in oklab, var(--ink) 50%, transparent); stroke-width: 1.4; }
.frag--draw rect, .frag--draw circle { fill: var(--mist); }
.frag--draw .hd { stroke-dasharray: 3 3; }
.frag--draw .sw1 { fill: var(--night); stroke: none; }
.frag--draw .sw2 { fill: var(--royal); stroke: none; }
.frag--draw .sw3 { fill: var(--paper); }
.f1 { left: 7vw;  top: 24vh; font-size: 1.1rem; }
.f2 { left: 4vw;  top: 71vh; font-size: 0.86rem; opacity: 0.8; }
.f3 { left: 24vw; top: 15vh; font-size: 0.8rem; opacity: 0.7; }
.f4 { left: 40vw; top: 23vh; font-size: 2rem; }
.f5 { right: 6vw; top: 19vh; width: clamp(140px, 14vw, 220px); }
.f6 { right: 38vw; top: 72vh; width: 60px; }
.f7 { right: 3vw; top: 43vh; width: clamp(96px, 8vw, 128px); }

.hero__line {
  position: absolute; bottom: clamp(2.5rem, 9vh, 6rem); margin: 0; max-width: 24rem; z-index: 3;
  font-size: var(--sc-t-lg); line-height: 1.4; letter-spacing: var(--sc-track-snug);
  color: var(--sc-ink-soft); text-wrap: balance;
}
.hero__line strong { color: var(--sc-ink); font-weight: 500; }
.hero__line--g { left: var(--sc-gutter); }
.hero__line--a { right: var(--sc-gutter); text-align: right; }
.hero__cross {
  position: absolute; bottom: clamp(2.5rem, 9vh, 6rem); margin: 0; z-index: 3;
  font-family: var(--sc-font-display); font-size: var(--sc-t-2xl); line-height: 1; letter-spacing: var(--sc-track-snug);
}
.hero__cross--g { right: calc(50% + var(--gap) * 0.6); text-align: right; }
.hero__cross--a { left: calc(50% + var(--gap) * 0.6); }

/* ==================================================================== DUO == */
.duo {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr 1fr;
  background: linear-gradient(90deg, var(--night) 50%, var(--mist) 50%);
}
/* the same seam light as the pinned grounds */
.duo::before, .duo::after { content: ""; position: absolute; top: 0; bottom: 0; width: 50%; pointer-events: none; }
.duo::before { left: 0; background: radial-gradient(60% 50% at 100% 50%, #111D38 0%, transparent 70%); }
.duo::after { right: 0; background: radial-gradient(60% 50% at 0% 50%, #EAEDF2 0%, transparent 70%); }
.duo > * { position: relative; z-index: 1; }
.duo__g, .duo__a { padding-block: var(--sc-section); min-width: 0; }
.duo__g { padding-inline: var(--sc-gutter) var(--gap); display: flex; flex-direction: column; align-items: flex-end; }
.duo__a { padding-inline: var(--gap) var(--sc-gutter); }
.duo__g > *, .duo__a > * { width: 100%; max-width: 34rem; }
.stack > * + * { margin-top: var(--sc-4); }
.stack > .sc-display { margin-top: 0; }

/* line-mask reveal (site.js wraps each word; words on one line share a delay) */
[data-lines] .w { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: 0.14em; margin-bottom: -0.14em; }
[data-lines] .w > i { display: inline-block; font-style: inherit; transform: translateY(108%); transition: transform 1100ms var(--expo); transition-delay: var(--d, 0ms); }
[data-lines].is-in .w > i { transform: none; }

/* 2 · problema */
.duo--problem .duo__g, .duo--problem .duo__a { padding-bottom: var(--sc-7); }
.duo--problem .stack { max-width: 31rem; }
.duo--problem .duo__g--turn, .duo--problem .duo__a--turn { padding-top: var(--sc-8); padding-bottom: var(--sc-section); }
.wipe { padding: 0.14em 0.04em 0.24em; }
.turn { margin: 0; line-height: 1; font-size: clamp(2.8rem, 1.4rem + 4.4vw, 5.4rem); letter-spacing: var(--sc-track-tight); }
.duo__g--turn .turn { text-align: right; }
.turn__note { margin-top: var(--sc-5); max-width: 28rem; }

/* 3 · serviços */
.who { display: flex; align-items: center; gap: 0.8rem; margin: 0 0 var(--sc-6); font-size: var(--sc-t-sm); letter-spacing: 0.14em; text-transform: uppercase; color: var(--sc-ink); font-weight: 500; }
.who__role { color: var(--sc-ink-soft); letter-spacing: 0.1em; }
.who__initial {
  display: grid; place-items: center; width: 2.6rem; height: 2.6rem; border-radius: 999px;
  font-family: var(--sc-font-display); font-size: 1.3rem; letter-spacing: 0; text-transform: none; font-weight: 500;
  color: var(--sc-ink); box-shadow: inset 0 0 0 1px var(--line);
}
.rows { list-style: none; padding: 0; margin: var(--sc-7) 0 0; }
.rows li { position: relative; padding: var(--sc-5) 3rem var(--sc-5) 0; isolation: isolate; }
.duo__a .rows li { padding: var(--sc-5) 3rem var(--sc-5) 0; }
/* the hairline draws itself as the row arrives */
.rows li::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 1px; background: var(--line);
  transform: scaleX(0); transform-origin: 100% 50%; transition: transform 1200ms var(--expo);
}
.duo__a .rows li::before { transform-origin: 0 50%; }
.rows li.sc-in::before { transform: scaleX(1); }
.rows li:last-child { box-shadow: inset 0 -1px 0 var(--line); }
/* hover: a wash sweeps in from the seam, the title steps toward it */
.rows li::after {
  content: ""; position: absolute; inset: 0 -1rem; z-index: -1; border-radius: 14px;
  background: color-mix(in oklab, var(--sc-ink) 5%, transparent);
  transform: scaleX(0); transform-origin: 100% 50%; transition: transform 700ms var(--expo);
}
.duo__a .rows li::after { transform-origin: 0 50%; }
.rows h3 { margin: 0; font-family: var(--sc-font-display); font-weight: 500; font-size: var(--sc-t-xl); line-height: 1.1; letter-spacing: var(--sc-track-snug); transition: transform 700ms var(--expo); }
.rows p { margin: 0.45rem 0 0; color: var(--sc-ink-soft); max-width: 40ch; }
.rows__arr {
  position: absolute; right: 0.25rem; top: 50%; width: 1.35rem; height: 1.35rem; margin-top: -0.675rem;
  fill: none; stroke: var(--sc-accent); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
  opacity: 0; transform: translateX(-10px); transition: opacity 300ms var(--sc-ease-out), transform 700ms var(--expo);
}
@media (hover: hover) and (pointer: fine) {
  .rows li:hover::after { transform: scaleX(1); }
  .rows li:hover h3 { transform: translateX(0.6rem); }
  .rows li:hover .rows__arr { opacity: 1; transform: none; }
}

/* ================================================================= MÉTODO == */
.method__col {
  position: absolute; top: var(--bar-h); bottom: 0; width: 36vw; z-index: 2;
  display: grid; align-items: center;
}
.method__col > * { grid-area: 1 / 1; }
.method__col--g { left: 6vw; }
.method__col--a { right: 6vw; }
.method__intro { max-width: 30rem; }
.step__tag { margin: 0 0 var(--sc-4); font-size: var(--sc-t-xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--sc-accent); font-weight: 500; }
.step__lead { margin: 0; font-family: var(--sc-font-display); font-weight: 500; font-size: clamp(2.3rem, 1.5rem + 2.6vw, 4.1rem); line-height: 1; letter-spacing: var(--sc-track-tight); text-wrap: balance; }
.step__side { margin: var(--sc-4) 0 0; font-size: var(--sc-t-lg); line-height: 1.45; color: var(--sc-ink-soft); max-width: 28rem; text-wrap: pretty; }
.step__side:first-child { margin-top: 0; }
.method__col--a .step__tag { visibility: hidden; }

/* the step word, set once per side and clipped at the seam, so one word
   crosses both grounds in two different tonal inks */
.wm { position: absolute; inset: 0; pointer-events: none; z-index: 1; }
.wm__side { position: absolute; inset: 0; }
.wm__side--g { clip-path: inset(0 calc((1 - var(--seam)) * 100%) 0 0); color: #141F38; }
.wm__side--a { clip-path: inset(0 0 0 calc(var(--seam) * 100%)); color: #D3D9E3; }
.wm__side span {
  position: absolute; left: 50%; bottom: -0.2em; translate: -50% 0;
  font-family: var(--sc-font-display); font-style: italic; font-weight: 500; white-space: nowrap;
  font-size: clamp(7rem, 19vw, 22rem); line-height: 1; letter-spacing: -0.03em;
  opacity: 0; will-change: opacity, transform;
}

/* ================================================================ MONTAR == */
.duo--build .duo__g, .duo--build .duo__a { padding-top: calc(var(--sc-section) * 0.9); }
.duo--build .sc-lede { margin-top: var(--sc-4); color: var(--sc-ink-soft); }
.pick { border: 0; margin: var(--sc-7) 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pick legend { padding: 0; margin-bottom: var(--sc-3); font-size: var(--sc-t-xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--sc-ink-soft); font-weight: 500; }
.pick label { position: relative; cursor: pointer; }
.pick input { position: absolute; opacity: 0; inset: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.pick span {
  position: relative; display: inline-flex; align-items: center; gap: 0;
  padding: 0.6rem 1.05rem; border-radius: 999px;
  box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--sc-ink) 28%, transparent);
  font-size: var(--sc-t-sm); line-height: 1.2;
  transition: background-color 240ms var(--sc-ease-out), color 240ms var(--sc-ease-out), box-shadow 240ms var(--sc-ease-out), transform 160ms var(--sc-ease-out), gap 420ms var(--expo);
}
/* a small tick grows in front of a chosen chip */
.pick span::before {
  content: ""; width: 0; height: 0.5rem; flex: none;
  border-radius: 99px; background: var(--sc-accent);
  transition: width 420ms var(--expo);
}
.pick input:checked + span { background: var(--sc-ink); color: var(--night); box-shadow: none; gap: 0.5rem; }
.pick input:checked + span::before { width: 0.5rem; }
.duo__a .pick input:checked + span { color: var(--mist); }
.duo__g .pick input:checked + span::before { background: var(--royal); }
.duo__a .pick input:checked + span::before { background: var(--royal-l); }
.pick input:focus-visible + span { outline: 2px solid var(--sc-accent); outline-offset: 3px; }
.pick label:active span { transform: scale(0.96); }
@media (hover: hover) and (pointer: fine) {
  .pick label:hover span { box-shadow: inset 0 0 0 1px var(--sc-ink); }
  .pick label:hover input:checked + span { box-shadow: none; }
}

.code, .sketch { margin: var(--sc-7) 0 0; }
.sketch figcaption { font-size: var(--sc-t-xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--sc-ink-soft); margin-bottom: var(--sc-3); font-weight: 500; }
.code { border-radius: 18px; background: var(--night-2); box-shadow: var(--sc-edge), var(--sc-e3); overflow: hidden; }
.code figcaption {
  display: flex; align-items: center; gap: 0.8rem; padding: 0.8rem 1.1rem;
  font-family: var(--sc-font-mono); font-size: 0.78rem; color: var(--ice-soft);
  border-bottom: 1px solid var(--line);
}
.code__dots { display: inline-flex; gap: 6px; }
.code__dots i { width: 9px; height: 9px; border-radius: 99px; background: var(--night-3); box-shadow: inset 0 0 0 1px var(--line); }
.code pre, .fuse__code pre {
  margin: 0; padding: var(--sc-5) var(--sc-5);
  font-family: var(--sc-font-mono); font-size: clamp(0.78rem, 0.72rem + 0.25vw, 0.92rem); line-height: 1.75;
  color: var(--ice); overflow-x: auto; white-space: pre;
}
.fuse__code pre { border-radius: 18px; background: var(--night-2); box-shadow: var(--sc-edge), var(--sc-e3); }
.cl { display: inline-block; min-width: 100%; margin-inline: -0.5rem; padding-inline: 0.5rem; border-radius: 4px; transition: background-color 1200ms var(--sc-ease-out); }
.cl.is-new { background: color-mix(in oklab, var(--royal-l) 22%, transparent); transition: none; }
.caret { display: inline-block; width: 0.55em; height: 1.1em; margin-left: 1px; vertical-align: -0.18em; background: var(--royal-l); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.tk-k { color: var(--royal-l); }
.tk-s { color: #C8D5F5; }
.tk-p { color: var(--ice-soft); }
.tk-c { color: #7F8DA8; font-style: italic; }
.tk-f { color: var(--ice); font-weight: 500; }

.namefield { display: block; }
.namefield span { display: block; font-size: var(--sc-t-xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--sc-ink-soft); font-weight: 500; }
.namefield input {
  display: block; width: 100%; margin-top: var(--sc-3); padding: 0.1em 0 0.18em;
  font-family: var(--sc-font-display); font-size: var(--sc-t-3xl); font-weight: 500; line-height: 1.05; letter-spacing: var(--sc-track-snug);
  color: var(--ink); background: transparent; border: 0; border-radius: 0; outline: none;
  background-image: linear-gradient(var(--royal), var(--royal)), linear-gradient(color-mix(in oklab, var(--ink) 35%, transparent), color-mix(in oklab, var(--ink) 35%, transparent));
  background-size: 0% 2px, 100% 1px; background-position: 0 100%, 0 100%; background-repeat: no-repeat;
  transition: background-size 700ms var(--expo);
}
.namefield input::placeholder { color: color-mix(in oklab, var(--ink) 30%, transparent); }
.namefield input:focus { background-size: 100% 2px, 100% 1px; }

.pv-host { position: relative; border-radius: 18px; background: var(--paper); box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--ink) 9%, transparent), var(--sc-e2); overflow: hidden; }
.pv-host svg { display: block; width: 100%; height: auto; }
.build__note { margin-top: var(--sc-5); font-size: var(--sc-t-sm); }

/* the preview drawing: every element carries a sketch and a finished layer */
.pv { --f: 0; font-family: var(--sc-font-text); }
.pv .sk { opacity: calc(1 - var(--f)); }
.pv .fx { opacity: var(--f); }
.pv .sk * { fill: none; stroke: color-mix(in oklab, var(--ink) 58%, transparent); stroke-width: 1.4; stroke-dasharray: 5 4; vector-effect: non-scaling-stroke; }
.pv .sk .solid { stroke-dasharray: none; }
.pv .sk text { fill: color-mix(in oklab, var(--ink) 62%, transparent); stroke: none; font-family: var(--sc-font-display); font-style: italic; }
.pv .sk text.up { font-style: normal; }
.pv-fit { transition: transform 700ms var(--expo); }
.pv .el { transition: opacity 300ms var(--sc-ease-out); }
.pv .el.is-off { opacity: 0; }
/* an element that switches on is drawn in, left to right */
.pv .el.is-drawing { animation: draw 900ms var(--expo) both; }
@keyframes draw { from { clip-path: inset(0 100% 0 0); } to { clip-path: inset(0 0 0 0); } }

/* ================================================================== FUSÃO == */
.fuse__half {
  position: absolute; top: calc(var(--bar-h) + 7vh); margin: 0; z-index: 2;
  font-family: var(--sc-font-display); font-size: var(--sc-t-2xl); line-height: 1; font-weight: 500;
}
.fuse__half--g { left: 7vw; }
.fuse__half--a { left: calc(50% + 7vw); font-style: italic; }
.fuse__mark {
  position: absolute; right: -0.02em; bottom: -0.19em; margin: 0; z-index: 1; pointer-events: none;
  font-family: var(--sc-font-display); font-weight: 500; line-height: 1; letter-spacing: -0.03em;
  font-size: clamp(8rem, 19vw, 21rem); color: #1F2B44; opacity: 0; will-change: transform, opacity;
}
.fuse__mark em { font-style: italic; color: #243357; }
.fuse__code {
  position: absolute; left: 0; top: 0; bottom: 0; width: 50%; z-index: 2;
  display: grid; align-items: center; padding-left: 7vw; padding-right: 7vw; padding-top: var(--bar-h);
}
.fuse__code pre { will-change: transform, opacity; max-width: 34rem; }
.fuse__preview {
  position: absolute; margin: 0; left: 6vw; width: min(44vw, 44rem); top: var(--bar-h); bottom: 0; z-index: 3;
  display: grid; align-items: center; perspective: 1400px;
}
.fuse__preview .pv-host { will-change: transform; box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--ink) 9%, transparent), var(--sc-e3); }
/* a sheen crosses the preview the moment it becomes finished */
.fuse__preview .pv-host::after {
  content: ""; position: absolute; inset: -20% -40%; pointer-events: none;
  background: linear-gradient(105deg, transparent 38%, rgb(255 255 255 / 0.55) 50%, transparent 62%);
  transform: translateX(var(--sheen, -110%));
}
.close {
  position: absolute; left: 56vw; right: var(--sc-gutter); top: var(--bar-h); bottom: 3rem; z-index: 3;
  display: grid; align-content: center; gap: var(--sc-6);
}
.close__title { font-size: var(--sc-t-3xl); }
.close__body > * + * { margin-top: var(--sc-5); }
.close__summary { margin-bottom: 0; font-size: var(--sc-t-sm); color: var(--ice-soft); max-width: 34rem; line-height: 1.55; padding-left: 1rem; box-shadow: inset 1px 0 0 var(--line); }
.close__summary strong { color: var(--ice); font-weight: 500; }
.close__field { display: grid; gap: 0.4rem; max-width: 26rem; }
.close__field label { font-size: var(--sc-t-xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--ice-soft); font-weight: 500; }
.close__field input {
  width: 100%; margin: 0; padding: 0.15rem 0 0.4rem; border: 0; border-radius: 0; outline: none;
  font-family: var(--sc-font-display); font-size: 1.6rem; font-weight: 500; line-height: 1.15; letter-spacing: var(--sc-track-snug);
  color: var(--ice); background-color: transparent;
  background-image: linear-gradient(var(--royal-l), var(--royal-l)), linear-gradient(color-mix(in oklab, var(--ice) 38%, transparent), color-mix(in oklab, var(--ice) 38%, transparent));
  background-size: 0% 2px, 100% 1px; background-position: 0 100%, 0 100%; background-repeat: no-repeat;
  transition: background-size 700ms var(--expo);
}
.close__field input::placeholder { color: color-mix(in oklab, var(--ice) 40%, transparent); }
.close__field input:focus, .close__field.is-invalid input { background-size: 100% 2px, 100% 1px; }
.close__field input:focus-visible { outline: none; }
.close__hint { margin: 0; font-size: var(--sc-t-sm); color: var(--royal-l); }
.close__hint:empty { display: none; }
.close__opt { display: inline-flex; align-items: center; gap: 0.6rem; cursor: pointer; font-size: var(--sc-t-sm); }
.close__opt input { width: 1.05rem; height: 1.05rem; margin: 0; }
.close__actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--sc-5); }
.close__mail { color: var(--ice); text-decoration: none; box-shadow: inset 0 -1px 0 color-mix(in oklab, var(--ice) 50%, transparent); }
.close__contact { font-size: var(--sc-t-sm); color: var(--ice-soft); }
.close__contact a { color: var(--ice-soft); text-decoration: none; }
@media (hover: hover) and (pointer: fine) { .close__contact a:hover { color: var(--ice); text-decoration: underline; } }
.foot { position: absolute; left: 56vw; right: var(--sc-gutter); bottom: 1.25rem; z-index: 3; font-size: var(--sc-t-xs); color: var(--ice-soft); }
.foot p { margin: 0; }
.foot .mark__ga { font-size: 1rem; color: var(--ice); }

/* ============================================================ phones ====== */
@media (max-width: 860px) {
  :root { --bar-h: 56px; }
  .bar__nav, .bar__link { display: none; }
  .bar__g-side { padding-inline: 1rem 0.5rem; }
  .bar__a-side { padding-inline: 0.5rem 1rem; }
  .mark__ga { font-size: 1.35rem; }
  .mark { padding-block: 0.7rem; }
  .pick span { padding: 0.72rem 1.05rem; }
  .seam { display: none; }

  /* the seam turns horizontal: top is Gabriel, bottom is Arthur */
  .halves__g { clip-path: inset(0 0 calc((1 - var(--seam)) * 100%) 0);
    background: radial-gradient(90% 70% at 50% 100%, #13203D 0%, transparent 70%), var(--night); }
  .halves__a { clip-path: inset(calc(var(--seam) * 100%) 0 0 0);
    background: radial-gradient(90% 70% at 50% 0%, #ECEFF4 0%, transparent 70%), var(--mist); }
  .hero__seam { left: 0; right: 0; top: 50%; bottom: auto; width: auto; height: 1px; margin: -0.5px 0 0;
    background: linear-gradient(to right, transparent, color-mix(in oklab, var(--royal-l) 55%, transparent) 25%, color-mix(in oklab, var(--royal-l) 55%, transparent) 75%, transparent); }
  html.is-loading .hero__seam { transform: scaleX(0); }

  .hero__stage { --fs: min(36vh, 62vw); }
  .grid { width: 100%; height: 50%; }
  .grid--g { top: 0; bottom: auto; -webkit-mask-image: radial-gradient(90% 90% at 50% 100%, #000 20%, transparent 80%); mask-image: radial-gradient(90% 90% at 50% 100%, #000 20%, transparent 80%); }
  .grid--a { top: 50%; bottom: auto; -webkit-mask-image: radial-gradient(90% 90% at 50% 0%, #000 20%, transparent 80%); mask-image: radial-gradient(90% 90% at 50% 0%, #000 20%, transparent 80%); }
  .ghost { display: none; }
  .hero__meta { display: none; }
  .hero__letter { top: auto; margin-top: 0; }
  .hero__letter--g { right: auto; left: 7vw; bottom: calc(50% + var(--fs) * 0.06); transform-origin: 0 100%; }
  .hero__letter--a { left: auto; right: 9vw; top: calc(50% + var(--fs) * 0.08); transform-origin: 100% 0; }
  .hero__line, .hero__cross { max-width: none; font-size: var(--sc-t-base); }
  .hero__line--g, .hero__cross--g { left: var(--sc-gutter); right: var(--sc-gutter); top: calc(var(--bar-h) + 1.25rem); bottom: auto; text-align: left; }
  .hero__line--a, .hero__cross--a { left: var(--sc-gutter); right: var(--sc-gutter); bottom: 1.75rem; text-align: right; }
  .hero__cross { font-size: var(--sc-t-xl); }
  .f1 { left: auto; right: 6vw; top: calc(var(--bar-h) + 29vh); font-size: 0.95rem; }
  .f2, .f3, .f6 { display: none; }
  .f4 { left: auto; right: 12vw; top: calc(var(--bar-h) + 19vh); font-size: 1.5rem; }
  .f5 { right: auto; left: 5vw; top: 58vh; width: 120px; }
  .f7 { right: auto; left: 6vw; top: 80vh; width: 96px; }

  .hero, .method, .fuse, .duo { background: none; }
  .duo::before, .duo::after { display: none; }
  .duo { grid-template-columns: 1fr; }
  .duo__g { background: radial-gradient(80% 60% at 50% 100%, #111D38 0%, transparent 70%), var(--night); align-items: stretch; }
  .duo__a { background: radial-gradient(80% 60% at 50% 0%, #EAEDF2 0%, transparent 70%), var(--mist); }
  .duo__g, .duo__a { padding-inline: var(--sc-gutter); padding-block: var(--sc-8); }
  .duo__g > *, .duo__a > * { max-width: none; }
  .kicker--ghost { display: none; }
  .duo--problem .duo__g--turn, .duo--problem .duo__a--turn { padding-block: var(--sc-7); }
  .duo__g--turn .turn { text-align: left; }
  .turn { font-size: var(--sc-t-2xl); }

  .method__col { left: var(--sc-gutter) !important; right: var(--sc-gutter) !important; width: auto; }
  .method__col--g { top: calc(var(--bar-h) + 0.5rem); bottom: 57%; align-items: end; }
  .method__col--a { top: 57%; bottom: 1rem; align-items: start; }
  .step__lead { font-size: var(--sc-t-2xl); }
  .step__side { font-size: var(--sc-t-base); }
  .method__col--a .step__tag { display: none; }
  .wm__side--g { clip-path: inset(0 0 calc((1 - var(--seam)) * 100%) 0); }
  .wm__side--a { clip-path: inset(calc(var(--seam) * 100%) 0 0 0); }
  .wm__side span { bottom: auto; top: 50%; translate: -50% -52%; font-size: 30vw; }

  .namefield input { font-size: var(--sc-t-2xl); }

  .halves__mix {
    -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 calc(var(--mix) * 130vmax - 16vmax), transparent calc(var(--mix) * 130vmax));
            mask-image: radial-gradient(circle at 50% 50%, #000 calc(var(--mix) * 130vmax - 16vmax), transparent calc(var(--mix) * 130vmax));
  }
  .fuse__half { top: auto; font-size: var(--sc-t-xl); }
  .fuse__half--g { left: var(--sc-gutter); top: calc(var(--bar-h) + 1rem); }
  .fuse__half--a { left: var(--sc-gutter); top: calc(50% + 1rem); }
  .fuse__mark { display: none; }
  .fuse__code { width: 100%; height: 50%; bottom: auto; padding: calc(var(--bar-h) + 3.5rem) var(--sc-gutter) 1.25rem; align-items: end; }
  .fuse__code pre { font-size: 0.7rem; line-height: 1.55; padding: 0.9rem 1rem; }
  .fuse__preview { left: var(--sc-gutter); right: var(--sc-gutter); width: auto; top: calc(var(--bar-h) + 0.75rem); bottom: auto; height: min(34vh, 62vw); display: block; }
  .fuse__preview .pv-host { width: min(100%, calc(min(34vh, 62vw) * 640 / 440)); margin-inline: auto; }
  .close { left: var(--sc-gutter); right: var(--sc-gutter); top: calc(var(--bar-h) + min(34vh, 62vw) + 1.5rem); bottom: 2.4rem; align-content: start; gap: var(--sc-4); }
  .close__title { font-size: var(--sc-t-2xl); }
  .close__body > * + * { margin-top: var(--sc-4); }
  .close__body .sc-lede { font-size: var(--sc-t-base); }
  .close__summary { display: none; }   /* the preview above already says it */
  .close__field input { font-size: 1.35rem; }
  .btn--primary { padding: 0.9rem 1.2rem 0.9rem 1.4rem; }
  .foot { left: var(--sc-gutter); bottom: 0.75rem; }
}
@media (max-width: 860px) and (max-height: 700px) {
  /* short phones: keep the field, the option and the button; drop the rest */
  .close__contact, .close__summary, .close__body .sc-lede { display: none; }
  .close { gap: var(--sc-3); }
  .close__body > * + * { margin-top: var(--sc-3); }
  .close__title { font-size: var(--sc-t-xl); }
  .fuse__stage:has(.close__field.is-invalid) .foot { opacity: 0 !important; }
}

/* ======================================================= reduced motion == */
@media (prefers-reduced-motion: reduce) {
  .hero__plane, .hero__letter, .fuse__code pre { transform: none !important; }
  html.is-loading .intro-hide, html.is-loading .hero__li, html.is-loading .ghost, html.is-loading .hero__plane--near .frag { opacity: 1; transform: none; }
  html.is-loading .bar, html.is-loading .hero__seam { transform: none; }
  [data-lines] .w > i { transform: none; transition: none; }
  .rows li::before { transform: none; }
  .pv .el.is-drawing { animation: none; }
  .fuse__preview .pv-host::after { display: none; }
  .bar { transition: none; }
  .bar.is-hidden { transform: none; }
  .halves__mix { -webkit-mask-image: none; mask-image: none; opacity: var(--mix); }
  .bar__mix { clip-path: none !important; opacity: var(--mix); }
}