/* ────────────────────────────────────────────────
   BuildTrust — Sistema de diseño
   Estética: arquitectónica · grafito profundo · bronce pulido
   ──────────────────────────────────────────────── */
:root {
  --bg:        #0B0B0C;   /* negro arquitectónico */
  --surface:   #101012;   /* grafito de superficie */
  --line:      #1E1E21;   /* hairline estructural */
  --line-soft: #18181A;
  --ink:       #E9E7E2;   /* blanco hueso */
  --ink-dim:   #99968E;   /* gris cálido */
  --ink-faint: #5C5A55;
  --accent:    #C2A878;   /* bronce */
  --accent-dim:#8A7757;
  --sans: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', 'SF Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent); color: #0B0B0C; }

a { color: var(--accent); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--ink); }
a:focus-visible, button:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 4px;
  border-radius: 2px;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 clamp(24px, 6vw, 48px);
}

/* ── Hero ───────────────────────────────────────── */
.hero {
  position: relative;
  padding: clamp(96px, 16vh, 160px) 0 clamp(64px, 10vh, 104px);
  overflow: hidden;
}
/* retícula de plano — firma visual */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px);
  background-size: calc(100% / 8) 100%;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 78%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 78%);
  pointer-events: none;
}
.hero-inner { position: relative; }

.status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  padding: 7px 16px;
  border-radius: 2px;
  margin-bottom: clamp(36px, 6vh, 56px);
  background: rgba(16,16,18,.6);
  backdrop-filter: blur(4px);
}
.status .dot {
  width: 5px; height: 5px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.wordmark {
  font-size: clamp(3.2rem, 9vw, 6rem);
  font-weight: 300;
  letter-spacing: -0.035em;
  line-height: 1.02;
  color: var(--ink);
}
.wordmark strong { font-weight: 600; }
.wordmark .terminal { color: var(--accent); }

.tagline {
  margin-top: 28px;
  max-width: 520px;
  font-size: clamp(1.02rem, 2vw, 1.18rem);
  font-weight: 300;
  color: var(--ink-dim);
  line-height: 1.6;
}
.tagline em {
  font-style: normal;
  color: var(--ink);
}

/* ── Regla de escala (divisor firma) ───────────── */
.scale-rule {
  display: block;
  width: 100%;
  height: 22px;
  margin-top: clamp(48px, 8vh, 72px);
  color: var(--line);
}
.scale-rule .major { stroke: var(--ink-faint); }
.scale-rule .origin { stroke: var(--accent); }

/* ── Secciones ─────────────────────────────────── */
section { padding: clamp(56px, 9vh, 88px) 0; }
section + section { border-top: 1px solid var(--line-soft); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-dim);
  margin-bottom: 26px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.eyebrow::after {
  content: "";
  height: 1px;
  flex: 0 0 36px;
  background: var(--line);
}

.lede {
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 300;
  line-height: 1.55;
  letter-spacing: -0.01em;
  max-width: 720px;
  color: var(--ink);
}
.lede strong { font-weight: 500; }

.body-copy {
  margin-top: 22px;
  max-width: 640px;
  color: var(--ink-dim);
  font-weight: 300;
  font-size: 1rem;
}
.body-copy + .body-copy { margin-top: 16px; }

/* ── Capacidades ───────────────────────────────── */
.capabilities {
  margin-top: clamp(40px, 6vh, 56px);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}
.cap {
  padding: 26px 28px 30px 0;
  border-right: 1px solid var(--line-soft);
}
.cap:nth-child(3n) { border-right: none; }
.cap + .cap { padding-left: 28px; }
.cap h3 {
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  margin-bottom: 8px;
  color: var(--ink);
}
.cap p {
  font-size: 0.86rem;
  font-weight: 300;
  color: var(--ink-dim);
  line-height: 1.6;
}

/* ── Stack ─────────────────────────────────────── */
.stack {
  margin-top: clamp(36px, 5vh, 48px);
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}
.chip {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--ink-dim);
  padding: 11px 18px;
  border-right: 1px solid var(--line);
  background: var(--surface);
  transition: color .2s ease, background .2s ease;
  flex: 1 0 auto;
  text-align: center;
}
.chip:last-child { border-right: none; }
.chip:hover { color: var(--accent); background: #131315; }

/* ── Equipo ────────────────────────────────────── */
.team {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0 32px;
  margin-top: clamp(36px, 5vh, 48px);
}
.member {
  border-top: 1px solid var(--line);
  padding-top: 22px;
  transition: border-color .25s ease;
}
.member:hover { border-top-color: var(--accent-dim); }
.member-name {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.flex-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: inherit;
  text-decoration: none;
}

.icon-link {
  width: 14px;
  height: 14px;
  min-width: 14px; /* Evita que flexbox escale el icono */
  flex-shrink: 0;  /* Previene deformaciones */
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.flex-link:hover .icon-link {
  opacity: 1;
}

.member-role {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--ink-dim);
  text-transform: uppercase;
}

/* ── Footer ────────────────────────────────────── */
footer {
  border-top: 1px solid var(--line);
  padding: clamp(40px, 6vh, 56px) 0 clamp(48px, 7vh, 64px);
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-grid p {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
.footer-grid a {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
}

/* ── Animación de entrada ──────────────────────── */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(14px);
    animation: rise .9s cubic-bezier(.22,.61,.36,1) forwards;
  }
  .reveal.d1 { animation-delay: .08s; }
  .reveal.d2 { animation-delay: .18s; }
  .reveal.d3 { animation-delay: .3s; }
  @keyframes rise {
    to { opacity: 1; transform: none; }
  }
}

/* ── Responsive ────────────────────────────────── */
@media (max-width: 760px) {
  .capabilities { grid-template-columns: 1fr; border-top: none; }
  .cap {
    border-right: none;
    border-top: 1px solid var(--line);
    padding: 22px 0;
  }
  .cap + .cap { padding-left: 0; }
  .team { grid-template-columns: 1fr; gap: 28px 0; }
  .chip { flex: 1 1 50%; border-bottom: 1px solid var(--line); }
  .stack { border-bottom: none; }
  .footer-grid { flex-direction: column; gap: 10px; }
}

/* ── Navegación ────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--line);
  background: rgba(11,11,12,.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 16px;
  padding-bottom: 16px;
}
.nav-brand {
  font-family: var(--sans);
  font-size: 1.02rem;
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.nav-brand strong { font-weight: 600; }
.nav-brand .terminal { color: var(--accent); }
.nav-brand:hover { color: var(--ink); }

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(20px, 4vw, 36px);
}
.nav-link {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.nav-link:hover { color: var(--accent); }
.nav-link.is-active { color: var(--ink); }

/* ── CTA (hairline) ────────────────────────────── */
.cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: clamp(32px, 5vh, 44px);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 12px 20px;
  transition: color .2s ease, border-color .2s ease;
}
.cta:hover { color: var(--accent); border-color: var(--accent-dim); }
.cta-arrow { transition: transform .2s ease; }
.cta:hover .cta-arrow { transform: translateX(4px); }

/* ── Demo · Hero ───────────────────────────────── */
.demo-hero { padding: clamp(56px, 11vh, 96px) 0 clamp(36px, 6vh, 56px); }
.demo-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--ink);
}
.demo-title em { font-style: normal; font-weight: 600; }
.demo-lede {
  margin-top: 24px;
  max-width: 600px;
  font-size: clamp(1.02rem, 2vw, 1.18rem);
  font-weight: 300;
  color: var(--ink-dim);
  line-height: 1.6;
}

/* ── Demo · Video ──────────────────────────────── */
#video { padding-top: 0; }
.video-frame {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--surface);
  overflow: hidden;
  line-height: 0;
}
.video-frame video {
  display: block;
  width: 100%;
  height: auto;
  background: #000;
}

/* ── Demo · Pasos ──────────────────────────────── */
.steps {
  list-style: none;
  margin-top: clamp(40px, 6vh, 56px);
  border-top: 1px solid var(--line);
}
.step {
  display: flex;
  gap: clamp(20px, 4vw, 40px);
  padding: 28px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: border-color .25s ease;
}
.step:hover { border-bottom-color: var(--accent-dim); }
.step-num {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--accent-dim);
  padding-top: 4px;
}
.step-body { max-width: 640px; }
.step-body h3 {
  font-size: 0.98rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  margin-bottom: 8px;
  color: var(--ink);
}
.step-body p {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--ink-dim);
  line-height: 1.6;
}

/* ── Responsive · nuevos componentes ───────────── */
@media (max-width: 760px) {
  .nav-inner { gap: 16px; }
  .nav-links { gap: 20px; }
  .step { gap: 18px; padding: 22px 0; }
}