/* ============================================================
   VITRUBIA — plano técnico sobre pergamino
   Tinta #1C1B1A · Pergamino #F4EFE6 · Rojo pompeyano #A63A2B
   Azul plano #3E5C76 (líneas técnicas, cotas, mono)
   ============================================================ */

:root {
  --tinta: #1C1B1A;
  --pergamino: #F4EFE6;
  --rojo: #A63A2B;
  --plano: #3E5C76;
  --plano-suave: rgba(62, 92, 118, 0.28);
  --plano-tenue: rgba(62, 92, 118, 0.14);
  --serif: Georgia, 'Times New Roman', 'Liberation Serif', serif;
  --cinzel: 'Cinzel', Georgia, serif;
  --mono: 'SF Mono', 'Menlo', 'Consolas', 'Liberation Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--pergamino);
  color: var(--tinta);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

/* ---------- utilidades ---------- */

.wrap {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.wrap--angosto { max-width: 44rem; }

.etiqueta {
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  color: var(--plano);
  margin-bottom: 1.25rem;
}

.etiqueta--pergamino { color: rgba(244, 239, 230, 0.62); }

.titulo {
  font-family: var(--cinzel);
  font-weight: 500;
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
}

.titulo--pergamino { color: var(--pergamino); }

/* ---------- botones ---------- */

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  padding: 0.8rem 1.9rem;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.btn--rojo {
  background: var(--rojo);
  color: var(--pergamino);
}

.btn--rojo:hover { background: #8f3225; }

.btn--pergamino {
  background: transparent;
  color: var(--pergamino);
  border-color: rgba(244, 239, 230, 0.45);
}

.btn--pergamino:hover {
  border-color: var(--pergamino);
  background: rgba(244, 239, 230, 0.07);
}

/* ---------- nav ---------- */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--plano-tenue);
}

.nav__brand img { width: 178px; height: auto; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
}

.nav__links a {
  color: var(--tinta);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.nav__links a:hover { border-bottom-color: var(--plano); }

.nav__cta {
  color: var(--rojo) !important;
  border: 1px solid var(--rojo);
  padding: 0.4rem 1rem;
}

.nav__cta:hover { background: rgba(166, 58, 43, 0.07); }

/* ---------- hero ---------- */

.hero {
  position: relative;
  text-align: center;
  padding: 5.5rem 1.5rem 4.5rem;
  /* capa de plano técnico: retícula fina azul sobre pergamino */
  background-image:
    linear-gradient(var(--plano-tenue) 1px, transparent 1px),
    linear-gradient(90deg, var(--plano-tenue) 1px, transparent 1px);
  background-size: 72px 72px;
  border-bottom: 1px solid var(--plano-tenue);
}

.hero__lockup {
  width: min(24rem, 78vw);
  margin: 0 auto 2.25rem;
}

.hero__title {
  font-family: var(--cinzel);
  font-weight: 500;
  font-size: clamp(1.45rem, 4.2vw, 2.4rem);
  letter-spacing: 0.03em;
  line-height: 1.25;
  margin-bottom: 0.9rem;
}

.hero__triada {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  color: rgba(28, 27, 26, 0.72);
  margin-bottom: 2.4rem;
}

.hero__cota {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 34rem;
  margin: 4.25rem auto 0;
}

.cota__linea {
  flex: 1;
  height: 1px;
  background: var(--plano-suave);
  position: relative;
}

.cota__linea::before,
.cota__linea::after {
  content: "";
  position: absolute;
  top: -3.5px;
  width: 1px;
  height: 8px;
  background: var(--plano-suave);
}

.cota__linea::before { left: 0; }
.cota__linea::after { right: 0; }

.cota__texto {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.24em;
  color: var(--plano);
  white-space: nowrap;
}

/* ---------- organum ---------- */

.organum {
  padding: 5.5rem 0;
  text-align: center;
}

.organum__texto {
  font-size: clamp(1.15rem, 2.6vw, 1.45rem);
  line-height: 1.6;
  margin-bottom: 1.6rem;
}

.organum__remate {
  font-size: clamp(1.05rem, 2.3vw, 1.25rem);
  line-height: 1.6;
}

.organum__remate strong { color: var(--rojo); font-weight: 600; }

/* ---------- pilares ---------- */

.pilares {
  padding: 5rem 0 5.5rem;
  border-top: 1px solid var(--plano-tenue);
  text-align: center;
}

.pilares__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 2.75rem;
  border-top: 1px solid var(--plano-suave);
  border-bottom: 1px solid var(--plano-suave);
}

.pilar {
  padding: 2.5rem 1.75rem 2.75rem;
  text-align: left;
}

.pilar + .pilar { border-left: 1px solid var(--plano-suave); }

.pilar__numero {
  font-family: var(--cinzel);
  font-size: 0.95rem;
  color: var(--plano);
  margin-bottom: 1.4rem;
}

.pilar__nombre {
  font-family: var(--cinzel);
  font-weight: 600;
  font-size: 1.3rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.2rem;
}

.pilar__glosa {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--plano);
  margin-bottom: 1.1rem;
}

.pilar__texto { font-size: 1rem; color: rgba(28, 27, 26, 0.85); }

/* ---------- caso vivo (banda tinta con fondo técnico) ---------- */

.caso {
  background-color: var(--tinta);
  background-image: url("../img/fondo-tecnico.svg");
  background-size: cover;
  background-position: center;
  color: var(--pergamino);
  padding: 5.5rem 0;
  text-align: center;
}

.caso__tarjeta {
  max-width: 40rem;
  margin: 0 auto;
  border: 1px solid rgba(244, 239, 230, 0.22);
  padding: 2.75rem 2rem 2.5rem;
  background: rgba(28, 27, 26, 0.72);
}

.caso__nombre {
  font-family: var(--cinzel);
  font-weight: 500;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  margin-bottom: 0.9rem;
}

.caso__texto {
  color: rgba(244, 239, 230, 0.85);
  margin-bottom: 2.1rem;
}

.caso__datos {
  display: flex;
  justify-content: center;
  gap: 2.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.4rem;
}

.dato dt {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(244, 239, 230, 0.55);
  margin-bottom: 0.35rem;
}

.dato dd {
  font-family: var(--mono);
  font-size: 1.25rem;
  color: var(--pergamino);
}

.caso__nota {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: rgba(244, 239, 230, 0.5);
  margin-bottom: 2.1rem;
}

/* ---------- sectores ---------- */

.sectores {
  padding: 3.5rem 0;
  text-align: center;
  border-bottom: 1px solid var(--plano-tenue);
}

.sectores__lista {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.9rem 1.1rem;
  font-family: var(--cinzel);
  font-size: clamp(0.95rem, 2.2vw, 1.15rem);
  letter-spacing: 0.05em;
}

.sectores__lista .sep { color: var(--plano); }

/* ---------- levantamiento ---------- */

.levantamiento {
  padding: 5.5rem 0 6rem;
  text-align: center;
}

.levantamiento__texto {
  font-size: clamp(1.05rem, 2.3vw, 1.2rem);
  margin-bottom: 1.4rem;
}

.levantamiento__texto strong { color: var(--rojo); }

.levantamiento .btn { margin-top: 0.9rem; }

/* ---------- contacto / footer ---------- */

.contacto {
  background: var(--tinta);
  color: var(--pergamino);
  text-align: center;
  padding: 5rem 0 3rem;
}

.contacto__lockup {
  width: min(15rem, 62vw);
  margin: 0 auto 2rem;
}

.contacto__botones {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0 3.25rem;
}

.contacto__pie {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(244, 239, 230, 0.5);
  border-top: 1px solid rgba(244, 239, 230, 0.14);
  padding-top: 1.75rem;
  max-width: 68rem;
  margin: 0 auto;
}

/* ---------- reveals ---------- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .pilares__grid { grid-template-columns: 1fr; }
  .pilar + .pilar {
    border-left: none;
    border-top: 1px solid var(--plano-suave);
  }
}

@media (max-width: 560px) {
  .nav { padding: 0.9rem 1rem; }
  .nav__brand img { width: 138px; }
  .nav__links { gap: 0.9rem; font-size: 0.75rem; }
  .nav__links a:not(.nav__cta) { display: none; }
  .hero { padding: 3.75rem 1rem 3.25rem; }
  .hero__cota { margin-top: 3rem; }
  .caso__tarjeta { padding: 2.25rem 1.25rem 2rem; }
  .caso__datos { gap: 1.5rem 2rem; }
  .contacto__botones { flex-direction: column; align-items: center; }
}