/* =====================================================================
   DandelIA — Hero animado · Estilos
   Paleta: negro profundo, carbón, grafito, marfil · acento lila #534ab7
   ===================================================================== */

:root {
  --black:      #07070a;
  --carbon:     #0d0d12;
  --graphite:   #16161d;
  --graphite-2: #1f1f28;
  --line:       rgba(255,255,255,.08);
  --line-2:     rgba(255,255,255,.14);

  --ivory:      #f4f1ea;
  --ivory-dim:  #cfcbc4;
  --muted:      #8f8c98;
  --muted-2:    #6b6875;

  --accent:     #534ab7;   /* lila */
  --accent-2:   #8b83e8;   /* lila claro (glow) */
  --accent-3:   #b7b1f2;

  --serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --sans:  "Space Grotesk", "Segoe UI", system-ui, -apple-system, sans-serif;

  --wrap: 1240px;
  --ease: cubic-bezier(.22,.61,.36,1);

  --nav-h: 74px;
}

/* ----------------------------- Reset ----------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--black);
  color: var(--ivory);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
img, picture, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4 { margin: 0; font-weight: 500; line-height: 1.05; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; border-radius: 2px; }

.wrap { width: min(100% - 2.6rem, var(--wrap)); margin-inline: auto; }

/* Section rhythm */
.section { position: relative; padding: clamp(5rem, 11vw, 10rem) 0; }
.section__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.1rem, 5.2vw, 4rem);
  letter-spacing: -.01em;
  line-height: 1.02;
}
.section__lead {
  color: var(--ivory-dim);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  max-width: 42ch;
  margin-top: 1.1rem;
}
.kicker {
  display: inline-block;
  font-size: .74rem;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--accent-3);
  margin-bottom: 1.4rem;
}
.kicker::before {
  content: ""; display: inline-block;
  width: 26px; height: 1px; background: var(--accent);
  vertical-align: middle; margin-right: .8rem;
  opacity: .8;
}

/* ----------------------------- Grain ----------------------------- */
.grain {
  position: fixed; inset: 0; z-index: 9998; pointer-events: none;
  opacity: .05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Top scroll progress bar */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 9997;
  background: transparent; pointer-events: none;
}
.scroll-progress span {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px rgba(139,131,232,.6);
}

/* ============================ LOADER ============================ */
.loader {
  position: fixed; inset: 0; z-index: 10000;
  display: grid; place-items: center;
  background: radial-gradient(120% 120% at 70% 30%, #101019 0%, var(--black) 60%);
  transition: opacity .8s var(--ease), visibility .8s;
}
.loader.is-done { opacity: 0; visibility: hidden; }
.loader__inner { display: grid; justify-items: center; gap: 1.4rem; width: min(80vw, 320px); text-align: center; }
.loader__mark { width: 46px; height: 46px; position: relative; }
.loader__seed {
  position: absolute; inset: 0; border-radius: 50%;
  border: 1px solid var(--line-2);
  box-shadow: inset 0 0 22px rgba(139,131,232,.25);
}
.loader__seed::before, .loader__seed::after {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  border-top: 1px solid var(--accent-2);
  animation: spin 1.4s linear infinite;
}
.loader__seed::after { border-top-color: transparent; border-right: 1px solid var(--accent); animation-duration: 2.1s; animation-direction: reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
.loader__brand {
  font-family: var(--serif); font-size: 1.9rem; letter-spacing: .04em; color: var(--ivory);
}
.loader__brand span { color: var(--accent-2); }
.loader__bar { width: 100%; height: 2px; background: var(--line); overflow: hidden; border-radius: 2px; }
.loader__fill { display: block; height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .25s var(--ease); }
.loader__pct { font-size: .74rem; letter-spacing: .3em; color: var(--muted); }

/* ============================== NAV ============================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 9000; height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(1.3rem, 4vw, 3rem);
  transition: background .4s var(--ease), backdrop-filter .4s var(--ease), border-color .4s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(7,7,10,.72);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  border-bottom-color: var(--line);
}
.nav__brand { display: flex; align-items: center; gap: .6rem; font-family: var(--serif); font-size: 1.35rem; letter-spacing: .03em; }
.nav__ia { color: var(--accent-2); }
.nav__logo {
  width: 20px; height: 20px; border-radius: 50%;
  background: radial-gradient(circle at 50% 40%, var(--accent-2), var(--accent) 60%, transparent 72%);
  box-shadow: 0 0 14px rgba(139,131,232,.55);
  position: relative; flex: 0 0 auto;
}
.nav__logo::after {
  content:""; position:absolute; inset:-4px; border-radius:50%;
  border:1px solid var(--line-2);
}
.nav__links { display: flex; align-items: center; gap: clamp(1.2rem, 2.4vw, 2.4rem); font-size: .9rem; }
.nav__links a { color: var(--ivory-dim); transition: color .25s; position: relative; }
.nav__links a:not(.nav__cta):hover { color: var(--ivory); }
.nav__links a:not(.nav__cta)::after {
  content: ""; position: absolute; left: 0; bottom: -6px; height: 1px; width: 0;
  background: var(--accent-2); transition: width .3s var(--ease);
}
.nav__links a:not(.nav__cta):hover::after { width: 100%; }
.nav__cta {
  border: 1px solid var(--line-2); padding: .55rem 1.15rem; border-radius: 40px;
  color: var(--ivory); transition: border-color .25s, background .25s, color .25s;
}
.nav__cta:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

.nav__toggle { display: none; background: none; border: 0; width: 40px; height: 40px; position: relative; }
.nav__toggle span { position: absolute; left: 8px; right: 8px; height: 1.5px; background: var(--ivory); transition: transform .3s, opacity .3s; }
.nav__toggle span:nth-child(1) { top: 15px; }
.nav__toggle span:nth-child(2) { bottom: 15px; }
.nav.menu-open .nav__toggle span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav.menu-open .nav__toggle span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: 0; z-index: 8500;
  background: rgba(7,7,10,.96); backdrop-filter: blur(10px);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1.6rem;
  font-family: var(--serif); font-size: 2rem;
  opacity: 0; visibility: hidden; transition: opacity .4s var(--ease), visibility .4s;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; }
.mobile-menu a { color: var(--ivory-dim); }
.mobile-menu a:hover { color: var(--accent-2); }

/* ============================== HERO ============================== */
.hero { position: relative; height: 500vh; }         /* long scroll track */
.hero__track { position: sticky; top: 0; height: 100vh; overflow: hidden; }
.hero__stage { position: absolute; inset: 0; display: grid; place-items: center; }

.hero__ghost {
  position: absolute; z-index: 1;
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(6rem, 30vw, 30rem);
  letter-spacing: -.03em; color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,.05);
  text-stroke: 1px rgba(255,255,255,.05);
  white-space: nowrap; user-select: none; pointer-events: none;
  will-change: transform, opacity;
}

.hero__media { position: absolute; inset: 0; z-index: 2; }
.hero__poster, .hero__video {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: center;
}
.hero__video { opacity: 0; transition: opacity .8s var(--ease); }
.hero__video.is-ready { opacity: 1; }
.hero__vignette {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(120% 90% at 65% 45%, transparent 40%, rgba(7,7,10,.55) 100%),
    linear-gradient(90deg, rgba(7,7,10,.85) 0%, rgba(7,7,10,.15) 42%, transparent 60%),
    linear-gradient(0deg, rgba(7,7,10,.9) 0%, transparent 30%);
}

.hero__content {
  position: relative; z-index: 3;
  width: min(100% - 2.6rem, var(--wrap));
  margin-inline: auto;
}
.hero__eyebrow {
  font-size: .76rem; letter-spacing: .34em; text-transform: uppercase;
  color: var(--accent-3); margin-bottom: 1.5rem;
}
.hero__brand {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(3.6rem, 13vw, 11rem);
  line-height: .9; letter-spacing: -.02em;
  color: var(--ivory);
  text-shadow: 0 0 60px rgba(0,0,0,.5);
}
.hero__model {
  font-family: var(--sans); font-weight: 400;
  font-size: clamp(1rem, 2.4vw, 1.7rem);
  letter-spacing: .04em; color: var(--ivory);
  margin-top: 1.1rem; max-width: 24ch;
}
.hero__phrase {
  font-family: var(--serif); font-style: italic;
  font-size: clamp(1rem, 1.7vw, 1.35rem);
  color: var(--ivory-dim); margin-top: 1.6rem; max-width: 40ch; line-height: 1.5;
}
.hero__scroll {
  display: inline-flex; align-items: center; gap: .9rem; margin-top: 2.6rem;
  font-size: .74rem; letter-spacing: .28em; text-transform: uppercase; color: var(--muted);
}
.hero__scroll-line { width: 54px; height: 1px; background: var(--line-2); position: relative; overflow: hidden; }
.hero__scroll-line::after {
  content: ""; position: absolute; inset: 0; width: 40%;
  background: var(--accent-2); animation: scrollhint 2.2s var(--ease) infinite;
}
@keyframes scrollhint { 0% { transform: translateX(-100%); } 60%,100% { transform: translateX(260%); } }

/* ============================ SECCIÓN 1 · INTRO ============================ */
.intro { border-top: 1px solid var(--line); }
.intro__head { max-width: 60rem; }
.intro__title {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(2.6rem, 8vw, 6.4rem);
  line-height: .98; letter-spacing: -.02em; margin-top: .4rem;
}
.intro__title-accent { color: var(--accent-2); font-style: italic; }
.intro__title-sub { color: var(--ivory-dim); }
.intro__lead {
  margin-top: 2rem; font-size: clamp(1.05rem, 1.7vw, 1.4rem);
  color: var(--ivory-dim); max-width: 48ch;
}
.stats {
  margin-top: clamp(3rem, 7vw, 6rem);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
}
.stat { background: var(--carbon); padding: clamp(1.6rem, 3vw, 2.6rem); transition: background .4s; }
.stat:hover { background: var(--graphite); }
.stat__idx { font-size: .8rem; letter-spacing: .2em; color: var(--accent-3); }
.stat__title { font-family: var(--serif); font-size: clamp(1.5rem, 3vw, 2.2rem); margin-top: 1.2rem; }
.stat__desc { color: var(--muted); margin-top: .8rem; font-size: .96rem; }

/* ============================ SECCIÓN 2 · SOLUCIONES ============================ */
.sol__top {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}
.sol__intro { max-width: 34rem; }
.sol__tags { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 2rem; }
.sol__tags li {
  font-size: .8rem; letter-spacing: .06em; color: var(--ivory-dim);
  border: 1px solid var(--line-2); padding: .45rem .9rem; border-radius: 40px;
}
.sol__figure { position: relative; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.sol__figure img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 3/2; transition: transform 1.2s var(--ease); }
.sol__figure:hover img { transform: scale(1.04); }
.sol__figure figcaption {
  position: absolute; left: 0; bottom: 0; right: 0; padding: 1.2rem 1.4rem;
  font-size: .82rem; color: var(--ivory-dim); letter-spacing: .04em;
  background: linear-gradient(0deg, rgba(7,7,10,.85), transparent);
}
.cards {
  margin-top: clamp(3rem, 6vw, 5rem);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
}
.card { background: var(--carbon); padding: clamp(1.6rem, 2.6vw, 2.4rem); position: relative; transition: background .4s; overflow: hidden; }
.card::before {
  content: ""; position: absolute; left: 0; top: 0; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .5s var(--ease);
}
.card:hover { background: var(--graphite); }
.card:hover::before { width: 100%; }
.card__num { font-size: .8rem; letter-spacing: .2em; color: var(--accent-3); }
.card__title { font-family: var(--serif); font-size: clamp(1.4rem, 2.4vw, 1.9rem); margin-top: 1rem; }
.card__meta { font-size: .78rem; letter-spacing: .08em; color: var(--accent-2); margin-top: .6rem; text-transform: uppercase; }
.card__desc { color: var(--muted); margin-top: .9rem; font-size: .95rem; }

/* ============================ SECCIÓN 3 · DEMOS ============================ */
.demos { background: linear-gradient(180deg, var(--black), var(--carbon) 50%, var(--black)); }
.demos__head { max-width: 46rem; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.demos__panel { border: 1px solid var(--line); border-radius: 6px; overflow: hidden; background: var(--carbon); }
.demos__selector { display: flex; flex-wrap: wrap; border-bottom: 1px solid var(--line); }
.demos__opt {
  flex: 1 1 auto; min-width: 120px; background: none; border: 0; color: var(--muted);
  padding: 1.1rem 1rem; font-size: .86rem; letter-spacing: .06em;
  border-right: 1px solid var(--line); transition: color .3s, background .3s; position: relative;
}
.demos__opt:last-child { border-right: 0; }
.demos__opt::after { content:""; position:absolute; left:0; bottom:-1px; height:2px; width:0; background: var(--accent-2); transition: width .35s var(--ease); }
.demos__opt:hover { color: var(--ivory); }
.demos__opt.is-active { color: var(--ivory); background: rgba(139,131,232,.06); }
.demos__opt.is-active::after { width: 100%; }
.demos__stage { display: grid; grid-template-columns: 1.1fr 1fr; }
.demos__figure { position: relative; overflow: hidden; min-height: 320px; border-right: 1px solid var(--line); }
.demos__figure img { width: 100%; height: 100%; object-fit: cover; }
.demos__glow {
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(60% 60% at 30% 55%, rgba(83,74,183,.28), transparent 70%);
  mix-blend-mode: screen; opacity: .8;
}
.demos__info { padding: clamp(1.8rem, 4vw, 3.2rem); display: flex; flex-direction: column; justify-content: center; }
.demos__info-title { font-family: var(--serif); font-size: clamp(1.6rem, 3vw, 2.4rem); }
.demos__info-desc { color: var(--ivory-dim); margin-top: 1rem; font-size: 1.02rem; }
.demos__info-list { margin-top: 1.6rem; display: grid; gap: .7rem; }
.demos__info-list li { position: relative; padding-left: 1.4rem; color: var(--muted); font-size: .95rem; }
.demos__info-list li::before { content: ""; position: absolute; left: 0; top: .55em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 8px rgba(139,131,232,.7); }
.demos__metric { margin-top: 2rem; display: flex; align-items: baseline; gap: .8rem; border-top: 1px solid var(--line); padding-top: 1.6rem; }
.demos__metric-val { font-family: var(--serif); font-size: clamp(2rem, 4vw, 3rem); color: var(--accent-2); }
.demos__metric-lbl { color: var(--muted); font-size: .9rem; max-width: 18ch; }

/* ============================ SECCIÓN 4 · LABS ============================ */
.labs__wrap { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 6rem); align-items: center; }
.labs__figure { border: 1px solid var(--line); border-radius: 4px; overflow: hidden; position: relative; }
.labs__figure::after { content:""; position:absolute; inset:0; box-shadow: inset 0 0 80px rgba(7,7,10,.6); pointer-events:none; }
.labs__figure img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.labs__specs { margin-top: 2.4rem; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.labs__specs li { background: var(--carbon); padding: 1.3rem 1.5rem; display: grid; grid-template-columns: auto 1fr; gap: 1.2rem; align-items: baseline; transition: background .4s; }
.labs__specs li:hover { background: var(--graphite); }
.labs__tag { font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-2); white-space: nowrap; }
.labs__specs p { color: var(--muted); font-size: .95rem; }

/* ============================ SECCIÓN 5 · TEAM ============================ */
.team { border-top: 1px solid var(--line); }
.team__head { max-width: 46rem; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.founders { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.founder { background: var(--carbon); padding: clamp(1.8rem, 4vw, 3rem); transition: background .4s; }
.founder:hover { background: var(--graphite); }
.founder__avatar {
  width: 76px; height: 76px; border-radius: 50%;
  display: grid; place-items: center; margin-bottom: 1.6rem;
  background: radial-gradient(circle at 40% 35%, rgba(139,131,232,.35), rgba(83,74,183,.12) 60%, transparent 72%);
  border: 1px solid var(--line-2);
  font-family: var(--serif); font-size: 1.5rem; letter-spacing: .05em; color: var(--accent-3);
  position: relative;
}
.founder__avatar::after { content:""; position:absolute; inset:-6px; border-radius:50%; border:1px solid var(--line); }
.founder__name { font-family: var(--serif); font-size: clamp(1.5rem, 3vw, 2.1rem); }
.founder__role { color: var(--accent-2); font-size: .92rem; letter-spacing: .04em; margin-top: .5rem; }
.founder__skills { margin-top: 1.6rem; display: flex; flex-wrap: wrap; gap: .5rem; }
.founder__skills li { font-size: .82rem; color: var(--ivory-dim); border: 1px solid var(--line-2); padding: .4rem .8rem; border-radius: 40px; }

.process { margin-top: clamp(3.5rem, 7vw, 6rem); }
.process__title { font-family: var(--serif); font-size: clamp(1.6rem, 3vw, 2.4rem); margin-bottom: 2rem; }
.process__list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.process__step { background: var(--carbon); padding: clamp(1.5rem, 2.6vw, 2.2rem); transition: background .4s; }
.process__step:hover { background: var(--graphite); }
.process__idx { font-family: var(--serif); font-size: 1.4rem; color: var(--accent-2); }
.process__step h4 { font-size: 1.15rem; margin-top: .6rem; letter-spacing: .01em; }
.process__step p { color: var(--muted); font-size: .92rem; margin-top: .6rem; }

/* ============================ SECCIÓN 6 · CONTACTO ============================ */
.contacto { position: relative; overflow: hidden; background: linear-gradient(180deg, var(--black), #0a0a10); }
.contacto::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: url("../assets/textures/ambient.webp") center/cover no-repeat;
  opacity: .22; mix-blend-mode: screen;
}
.contacto .wrap { position: relative; z-index: 1; }
.contacto__head { max-width: 46rem; margin-bottom: clamp(2.5rem, 5vw, 3.5rem); }
.needs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-bottom: clamp(3rem, 6vw, 4.5rem); }
.need { text-align: left; background: var(--carbon); border: 0; padding: clamp(1.4rem, 2.6vw, 2rem); transition: background .35s; position: relative; }
.need::before { content:""; position:absolute; left:0; top:0; bottom:0; width:2px; background: var(--accent); transform: scaleY(0); transform-origin: top; transition: transform .35s var(--ease); }
.need:hover { background: var(--graphite); }
.need.is-selected { background: var(--graphite); }
.need.is-selected::before, .need:hover::before { transform: scaleY(1); }
.need h3 { font-family: var(--serif); font-size: 1.3rem; color: var(--ivory); }
.need p { color: var(--muted); font-size: .9rem; margin-top: .55rem; }

.form { max-width: 62rem; }
.form__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem 1.6rem; }
.field { display: flex; flex-direction: column; gap: .5rem; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ivory-dim); }
.field input, .field select, .field textarea {
  background: var(--carbon); border: 1px solid var(--line-2); color: var(--ivory);
  padding: .9rem 1rem; border-radius: 3px; font-family: inherit; font-size: 1rem;
  transition: border-color .25s, background .25s, box-shadow .25s; width: 100%;
}
.field textarea { resize: vertical; min-height: 120px; }
.field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238b83e8' fill='none' stroke-width='1.4'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent-2); background: var(--graphite); box-shadow: 0 0 0 3px rgba(139,131,232,.14); }
.field.is-invalid input, .field.is-invalid select, .field.is-invalid textarea { border-color: #d16b6b; }
.field__error { font-size: .78rem; color: #e08a8a; min-height: 1em; }
.form__foot { margin-top: 1.8rem; display: flex; align-items: center; gap: 1.6rem; flex-wrap: wrap; }
.btn {
  background: var(--accent); color: #fff; border: 1px solid var(--accent);
  padding: .95rem 2.2rem; border-radius: 40px; font-size: .95rem; letter-spacing: .04em;
  transition: transform .25s var(--ease), background .25s, box-shadow .25s;
}
.btn:hover { background: var(--accent-2); box-shadow: 0 10px 30px -10px rgba(83,74,183,.7); transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.form__note { font-size: .92rem; color: var(--accent-3); }
.form__note.is-ok { color: #8fe0b0; }
.form__note.is-err { color: #e08a8a; }

/* ============================== FOOTER ============================== */
.footer { border-top: 1px solid var(--line); padding: clamp(2.5rem, 5vw, 4rem) 0; }
.footer__wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 2rem; justify-content: space-between; }
.footer__brand { display: flex; align-items: center; gap: .6rem; font-family: var(--serif); font-size: 1.3rem; }
.footer__tag { color: var(--muted); font-size: .95rem; }
.footer__copy { color: var(--muted-2); font-size: .84rem; }

/* ============================== REVEAL ============================== */
[data-reveal] { opacity: 0; transform: translateY(28px); }
.no-gsap [data-reveal], .is-revealed [data-reveal], [data-reveal].is-revealed { opacity: 1; transform: none; }

/* ============================== RESPONSIVE ============================== */
@media (max-width: 1024px) {
  .sol__top { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .process__list { grid-template-columns: repeat(2, 1fr); }
  .needs { grid-template-columns: repeat(2, 1fr); }
  .demos__stage { grid-template-columns: 1fr; }
  .demos__figure { border-right: 0; border-bottom: 1px solid var(--line); min-height: 260px; }
}
@media (max-width: 760px) {
  .nav__links { display: none; }
  .nav__toggle { display: block; }
  .stats { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .labs__wrap { grid-template-columns: 1fr; }
  .founders { grid-template-columns: 1fr; }
  .process__list { grid-template-columns: 1fr; }
  .needs { grid-template-columns: 1fr; }
  .form__grid { grid-template-columns: 1fr; }
  .hero { height: 420vh; }
  .hero__content { text-align: left; }
}
@media (max-width: 420px) {
  .demos__selector { flex-wrap: wrap; }
  .demos__opt { flex: 1 1 45%; }
}

/* ============================== REDUCED MOTION ============================== */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .hero { height: 100vh; }
  .hero__track { position: relative; }
  .hero__video { display: none; }
  .hero__poster { opacity: 1; }
  [data-reveal] { opacity: 1; transform: none; }
  .hero__scroll-line::after, .loader__seed::before, .loader__seed::after { animation: none; }
}