/* ============================================================
   CASA ARIA — Landing Passivhaus
   Paleta sobria: arena / concreto / off-white / verde sutil
   ============================================================ */

:root{
  --arena:      #b7a894;
  --arena-claro:#cabfae;
  --concreto:   #8b8880;
  --hueso:      #f6f3ee;
  --off:        #faf8f4;
  --off-2:      #efeae1;
  --tinta:      #1c1a17;
  --tinta-2:    #2c2925;
  --grafito:    #55514a;
  --verde:      #5f6f57;   /* verde sutil */
  --verde-claro:#7d8c72;
  --linea:      #e2dccf;
  --blanco:     #ffffff;

  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans:  'Jost', -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;

  --pad: clamp(1.4rem, 5vw, 8rem);
  --maxw: 1400px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  font-family:var(--sans);
  color:var(--tinta);
  background:var(--off);
  line-height:1.6;
  font-weight:300;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{ display:block; max-width:100%; height:auto; }
a{ color:inherit; text-decoration:none; }
em{ font-style:italic; color:var(--verde); }

/* ---------- Tipografía utilitaria ---------- */
.h-display{
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(2rem, 5vw, 4.2rem);
  line-height:1.05;
  letter-spacing:-.01em;
  margin-bottom:1.4rem;
}
.eyebrow{
  display:inline-block;
  font-size:.72rem;
  letter-spacing:.32em;
  text-transform:uppercase;
  color:var(--verde);
  font-weight:500;
  margin-bottom:1.2rem;
}
.eyebrow--light{ color:var(--arena-claro); }

/* ============================================================
   INTRO / LOADER
   ============================================================ */
.intro{
  position:fixed; inset:0; z-index:9999;
  background:var(--tinta);
  display:flex; align-items:center; justify-content:center;
  transition:opacity .5s var(--ease), visibility .5s;
}
.intro.hide{ opacity:0; visibility:hidden; }
.intro__inner{ text-align:center; color:var(--off); padding:2rem; }
.intro__label{
  display:block; font-size:.7rem; letter-spacing:.3em; text-transform:uppercase;
  color:var(--arena); margin-bottom:1.2rem;
  opacity:0; animation:fadeUp .4s .03s var(--ease) forwards;
}
.intro__brand{
  font-family:var(--serif); font-weight:400;
  font-size:clamp(2.6rem, 9vw, 6.5rem); letter-spacing:.12em;
  color:var(--off); line-height:1;
  opacity:0; animation:fadeUp .45s .1s var(--ease) forwards;
}
.intro__tag{
  display:block; font-size:.85rem; letter-spacing:.22em; text-transform:uppercase;
  color:var(--concreto); margin-top:1.1rem;
  opacity:0; animation:fadeUp .45s .2s var(--ease) forwards;
}
.intro__bar{
  width:160px; height:1px; background:rgba(255,255,255,.18);
  margin:2.4rem auto 0; overflow:hidden;
}
.intro__bar span{
  display:block; height:100%; width:0; background:var(--arena);
  animation:load .55s .1s var(--ease) forwards;
}
@keyframes load{ to{ width:100%; } }
@keyframes fadeUp{ from{opacity:0; transform:translateY(18px);} to{opacity:1; transform:none;} }

/* ============================================================
   HEADER
   ============================================================ */
.header{
  position:fixed; top:0; left:0; right:0; z-index:900;
  display:flex; align-items:center; justify-content:space-between;
  padding:1.5rem var(--pad);
  transition:background .5s var(--ease), padding .5s var(--ease), box-shadow .5s;
  mix-blend-mode:difference;
}
.header.solid{
  background:rgba(250,248,244,.92);
  backdrop-filter:saturate(180%) blur(12px);
  padding:1rem var(--pad);
  mix-blend-mode:normal;
  box-shadow:0 1px 0 var(--linea);
}
.header__logo{
  font-family:var(--serif); font-size:1.5rem; letter-spacing:.14em; color:#fff;
}
.header.solid .header__logo{ color:var(--tinta); }
.header__nav{ display:flex; gap:2rem; align-items:center; }
.header__nav a{
  font-size:.78rem; letter-spacing:.14em; text-transform:uppercase; color:#fff;
  position:relative; padding:.2rem 0; transition:opacity .3s;
}
.header.solid .header__nav a{ color:var(--tinta-2); }
.header__nav a:not(.header__cta)::after{
  content:''; position:absolute; left:0; bottom:-2px; width:0; height:1px;
  background:currentColor; transition:width .4s var(--ease);
}
.header__nav a:not(.header__cta):hover::after{ width:100%; }
.header__cta{
  border:1px solid rgba(255,255,255,.6); padding:.55rem 1.1rem !important; border-radius:2px;
}
.header.solid .header__cta{ border-color:var(--tinta); }
.header__burger{
  display:none; flex-direction:column; gap:5px; background:none; border:0; cursor:pointer; padding:6px;
}
.header__burger span{ width:26px; height:2px; background:#fff; transition:.4s var(--ease); }
.header.solid .header__burger span{ background:var(--tinta); }

/* ---------- Botón WhatsApp en header ---------- */
.header__wa{
  margin-left:auto; margin-right:1.1rem;
  font-size:.72rem; letter-spacing:.16em; text-transform:uppercase; color:#fff;
  border:1px solid rgba(255,255,255,.55); padding:.5rem 1rem; border-radius:2px; transition:.3s;
}
.header.solid .header__wa{ color:var(--tinta); border-color:var(--tinta); }
.header__wa:hover{ background:#25D366; border-color:#25D366; color:#fff; }

/* ---------- Botón hamburguesa (siempre visible) ---------- */
.header__burger{ display:flex; flex-direction:column; gap:5px; background:none; border:0; cursor:pointer; padding:6px; z-index:1100; }
.header__burger span{ width:26px; height:2px; background:#fff; transition:.4s var(--ease); }
.header.solid .header__burger span{ background:var(--tinta); }
body.menu-open .header{ z-index:1200; mix-blend-mode:normal; background:transparent; box-shadow:none; }
body.menu-open .header__logo{ color:#fff; }
body.menu-open .header__wa{ display:none; }
body.menu-open .header__burger span{ background:#fff; }
body.menu-open .header__burger span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
body.menu-open .header__burger span:nth-child(2){ opacity:0; }
body.menu-open .header__burger span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* ---------- Menú desplegable (overlay) ---------- */
.menu{
  position:fixed; inset:0; z-index:1000; background:rgba(20,18,15,.98);
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:0; opacity:0; visibility:hidden; transform:translateY(-12px);
  transition:opacity .5s var(--ease), transform .5s var(--ease), visibility .5s;
}
body.menu-open .menu{ opacity:1; visibility:visible; transform:none; }
.menu__inner{ display:flex; flex-direction:column; align-items:center; gap:.4rem; }
.menu__inner a{
  font-family:var(--serif); font-size:clamp(1.6rem,4vw,2.4rem); color:var(--off);
  padding:.35rem 1rem; letter-spacing:.02em; opacity:.85; transition:.3s; position:relative;
}
.menu__inner a:hover{ opacity:1; color:var(--arena); }
.menu__cta{ margin-top:.8rem; font-size:1rem !important; font-family:var(--sans) !important;
  text-transform:uppercase; letter-spacing:.2em; border:1px solid var(--arena); border-radius:2px; }
.menu__foot{ position:absolute; bottom:2rem; font-size:.7rem; letter-spacing:.2em; text-transform:uppercase; color:var(--concreto); }

/* ============================================================
   HERO
   ============================================================ */
.hero{ position:relative; height:100vh; min-height:600px; overflow:hidden;
  display:flex; align-items:center; }
.hero__media{ position:absolute; inset:0; z-index:0; }
.hero__slide{
  position:absolute; inset:0; background-size:cover; background-position:center;
  opacity:0; transform:scale(1.06);
  transition:opacity 1.6s var(--ease), transform 7s linear;
}
.hero__slide.is-active{ opacity:1; transform:scale(1); }
.hero__overlay{
  position:absolute; inset:0;
  background:
    linear-gradient(90deg, rgba(15,13,11,.74) 0%, rgba(15,13,11,.45) 38%, rgba(15,13,11,.12) 75%, rgba(15,13,11,.05) 100%),
    linear-gradient(180deg, rgba(15,13,11,.30) 0%, rgba(15,13,11,.10) 35%, rgba(15,13,11,.55) 100%);
}
.hero__content{
  position:relative; z-index:2; color:var(--off);
  padding:0 var(--pad); max-width:var(--maxw); margin:0 auto; width:100%;
}
.hero__eyebrow{
  display:inline-block; font-size:.78rem; letter-spacing:.32em; text-transform:uppercase;
  color:var(--arena-claro); margin-bottom:1.4rem;
}
.hero__title{
  font-family:var(--serif); font-weight:400;
  font-size:clamp(3rem, 12vw, 8.5rem); line-height:.95; letter-spacing:.02em;
  margin-bottom:1.4rem;
}
.hero__sub{ font-size:clamp(1rem,1.6vw,1.25rem); max-width:36ch; color:rgba(255,255,255,.9); font-weight:300; }
.hero__actions{ display:flex; gap:1rem; margin-top:2.4rem; flex-wrap:wrap; }
.hero__scroll{
  position:absolute; bottom:2rem; left:50%; transform:translateX(-50%); z-index:2;
  color:var(--off); font-size:.68rem; letter-spacing:.25em; text-transform:uppercase;
  display:flex; flex-direction:column; align-items:center; gap:.6rem;
}
.hero__scroll span{ width:1px; height:44px; background:rgba(255,255,255,.5); position:relative; overflow:hidden; }
.hero__scroll span::after{ content:''; position:absolute; top:-100%; left:0; width:100%; height:100%;
  background:var(--off); animation:scrollLine 2s infinite var(--ease); }
@keyframes scrollLine{ 0%{top:-100%} 60%{top:100%} 100%{top:100%} }

/* ============================================================
   BOTONES
   ============================================================ */
.btn{
  display:inline-flex; align-items:center; gap:.6rem;
  font-size:.78rem; letter-spacing:.18em; text-transform:uppercase; font-weight:400;
  padding:.95rem 1.8rem; border-radius:2px; cursor:pointer; border:1px solid transparent;
  transition:all .4s var(--ease);
}
.btn--light{ background:var(--off); color:var(--tinta); }
.btn--light:hover{ background:transparent; color:var(--off); border-color:var(--off); }
.btn--ghost{ border-color:rgba(255,255,255,.55); color:var(--off); }
.btn--ghost:hover{ background:var(--off); color:var(--tinta); border-color:var(--off); }
.btn--dark{ background:var(--tinta); color:var(--off); width:100%; justify-content:center; }
.btn--dark:hover{ background:var(--verde); }
.btn--wa{ background:#25D366; color:#fff; margin-top:1.8rem; }
.btn--wa:hover{ background:#1da851; }

/* ============================================================
   SECCIONES GENÉRICAS
   ============================================================ */
.section{ padding:clamp(4rem,10vw,9rem) var(--pad); max-width:var(--maxw); margin:0 auto; }
.section__head{ max-width:720px; margin:0 auto clamp(2.5rem,5vw,4rem); text-align:center; }
.section__lead{ font-size:1.1rem; color:var(--grafito); font-weight:300; }
.section__grid{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(2rem,5vw,5rem); align-items:center; }
.section__text p{ color:var(--grafito); margin-bottom:1.1rem; max-width:52ch; }
.section__figure img,
.section__figure .map{ border-radius:3px; box-shadow:0 30px 60px -30px rgba(0,0,0,.25); }
.section__figure .map{ aspect-ratio:4/3; overflow:hidden; }
.map iframe{ width:100%; height:100%; }

/* ---------- Concepto ---------- */
.concepto{ background:var(--off); }

/* ---------- Passivhaus ---------- */
.passivhaus{ background:var(--off-2); max-width:none; }
.passivhaus .section__head,
.passivhaus .features{ max-width:var(--maxw); margin-left:auto; margin-right:auto; }
.features{ display:grid; grid-template-columns:repeat(4,1fr); gap:1.5rem; }
.feature{
  background:var(--off); padding:2.4rem 1.8rem; border-radius:3px; border:1px solid var(--linea);
  transition:transform .5s var(--ease), box-shadow .5s;
}
.feature:hover{ transform:translateY(-6px); box-shadow:0 24px 48px -28px rgba(0,0,0,.28); }
.feature__num{ font-family:var(--serif); font-size:1.6rem; color:var(--arena); display:block; margin-bottom:.8rem; }
.feature h4{ font-family:var(--serif); font-size:1.4rem; font-weight:500; margin-bottom:.7rem; line-height:1.2; }
.feature p{ font-size:.92rem; color:var(--grafito); }

/* ---------- Galería (retrato) ---------- */
.gallery{ display:grid; grid-template-columns:repeat(5,1fr); gap:1rem; }
.gallery__item{ overflow:hidden; border-radius:3px; aspect-ratio:3/4; }
.gallery__item img{ width:100%; height:100%; object-fit:cover; transition:transform .9s var(--ease); }
.gallery__item:hover img{ transform:scale(1.06); }

/* ---------- Tour ---------- */
.tour__frame{
  aspect-ratio:16/9; border-radius:3px; overflow:hidden;
  box-shadow:0 40px 80px -40px rgba(0,0,0,.4);
}
.tour__placeholder{
  width:100%; height:100%;
  background:linear-gradient(135deg,var(--tinta) 0%,var(--tinta-2) 60%,var(--grafito) 100%);
  color:var(--off); display:flex; flex-direction:column; align-items:center; justify-content:center; gap:.6rem;
}
.tour__placeholder span{ font-family:var(--serif); font-size:1.8rem; letter-spacing:.06em; }
.tour__placeholder small{ font-size:.78rem; color:var(--concreto); letter-spacing:.05em; }
.tour__frame iframe{ width:100%; height:100%; border:0; }

/* ---------- Ficha / Specs ---------- */
.specs{ display:grid; grid-template-columns:repeat(4,1fr); gap:1rem; margin-bottom:3rem; text-align:center; }
.spec{ padding:2rem 1rem; border:1px solid var(--linea); border-radius:3px; background:var(--off); }
.spec__num{ font-family:var(--serif); font-size:clamp(2.4rem,5vw,3.6rem); color:var(--tinta); line-height:1; display:inline-block; }
.spec__unit{ font-family:var(--serif); font-size:1.2rem; color:var(--arena); margin-left:.15em; }
.spec__label{ font-size:.74rem; letter-spacing:.16em; text-transform:uppercase; color:var(--concreto); margin-top:.6rem; display:block; }
.specs-list{ max-width:720px; margin:0 auto; }
.specs-list ul{ list-style:none; }
.specs-list li{ padding:1rem 0; border-bottom:1px solid var(--linea); color:var(--grafito); font-size:1rem; }
.specs-list li strong{ color:var(--tinta); font-weight:500; }
.ph{ color:var(--arena); font-style:italic; }

/* ---------- Avance de obra ---------- */
.obra__grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:1rem; }
.obra__grid--3{ grid-template-columns:repeat(3,1fr); }
.obra__grid--3 .obra__item img{ aspect-ratio:4/5; }
.obra__item{ overflow:hidden; border-radius:3px; position:relative; }
.obra__item img{ width:100%; aspect-ratio:3/4; object-fit:cover; transition:transform .8s var(--ease); }
.obra__item:hover img{ transform:scale(1.05); }
.obra__item figcaption{
  position:absolute; bottom:0; left:0; right:0; padding:1rem;
  background:linear-gradient(transparent, rgba(20,18,15,.75));
  color:var(--off); font-size:.8rem; letter-spacing:.14em; text-transform:uppercase;
}

/* ---------- Ubicación ---------- */
.ubicacion__meta{ font-size:.8rem; letter-spacing:.2em; text-transform:uppercase; color:var(--concreto); margin-top:1rem; }
.loc-title{ font-family:var(--serif); font-size:clamp(1.4rem,3vw,2rem); margin:2.4rem 0 1.3rem; color:var(--tinta); }
.loc-gallery{ display:grid; grid-template-columns:repeat(3,1fr); gap:1.2rem; }
.loc-item__img{ overflow:hidden; border-radius:3px; aspect-ratio:4/3; }
.loc-item img{ width:100%; height:100%; object-fit:cover; cursor:zoom-in; transition:transform .7s var(--ease); }
.loc-item:hover img{ transform:scale(1.05); }
.loc-item figcaption{ margin-top:.6rem; font-size:.78rem; letter-spacing:.12em; text-transform:uppercase; color:var(--concreto); text-align:center; }
@media(max-width:768px){ .loc-gallery{ grid-template-columns:repeat(2,1fr); } }

/* ============================================================
   CONTACTO
   ============================================================ */
.contacto{ background:var(--tinta); color:var(--off); max-width:none; }
.contacto__inner{ max-width:var(--maxw); margin:0 auto; display:grid; grid-template-columns:1fr 1fr; gap:clamp(2.5rem,6vw,6rem); align-items:center; }
.contacto__text h3{ color:var(--off); }
.contacto__text p{ color:rgba(255,255,255,.7); max-width:44ch; }
.contacto__form{ background:var(--off); padding:clamp(1.8rem,3vw,2.6rem); border-radius:4px; }
.field{ margin-bottom:1.2rem; }
.field label{ display:block; font-size:.72rem; letter-spacing:.16em; text-transform:uppercase; color:var(--grafito); margin-bottom:.5rem; }
.field input, .field textarea{
  width:100%; padding:.85rem 1rem; border:1px solid var(--linea); border-radius:2px;
  font-family:var(--sans); font-size:.95rem; color:var(--tinta); background:var(--blanco);
  transition:border-color .3s;
}
.field input:focus, .field textarea:focus{ outline:none; border-color:var(--verde); }
.form__note{ margin-top:1rem; font-size:.85rem; text-align:center; min-height:1.2em; }
.form__note.ok{ color:var(--verde); }
.form__note.err{ color:#c0563f; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer{ background:var(--tinta-2); color:var(--off); text-align:center; padding:clamp(3rem,6vw,5rem) var(--pad); }
.footer__brand{ font-family:var(--serif); font-size:2rem; letter-spacing:.16em; margin-bottom:.8rem; }
.footer__tag{ color:var(--concreto); font-size:.9rem; margin-bottom:1.8rem; }
.footer__nav{ display:flex; gap:1.6rem; justify-content:center; margin-bottom:1.8rem; flex-wrap:wrap; }
.footer__nav a{ font-size:.76rem; letter-spacing:.14em; text-transform:uppercase; color:rgba(255,255,255,.75); transition:color .3s; }
.footer__nav a:hover{ color:var(--arena); }
.footer__legal{ font-size:.76rem; color:var(--grafito); }
.footer__links{ margin-top:1.2rem; }
.footer__links a{ font-size:.78rem; letter-spacing:.1em; color:var(--arena); text-decoration:underline; }
.footer__links a:hover{ color:var(--off); }
.footer__admin{ margin-top:1rem; }
.footer__admin a{ font-size:.72rem; letter-spacing:.12em; text-transform:uppercase; color:var(--concreto); border:1px solid rgba(255,255,255,.14); padding:.45rem .95rem; border-radius:2px; transition:.3s; }
.footer__admin a:hover{ color:var(--off); border-color:var(--arena); }

/* ============================================================
   PÁGINA LEGAL (Aviso de Privacidad)
   ============================================================ */
.legal{ padding:clamp(6rem,12vw,9rem) var(--pad) 4rem; background:var(--off); }
.legal__wrap{ max-width:820px; margin:0 auto; }
.legal h1{ margin:.6rem 0 .4rem; }
.legal__updated{ font-size:.85rem; color:var(--concreto); margin-bottom:2.5rem; }
.legal h2{ font-family:var(--serif); font-weight:500; font-size:1.5rem; color:var(--tinta); margin:2.2rem 0 .8rem; }
.legal p{ color:var(--grafito); margin-bottom:1rem; line-height:1.7; }
.legal ul{ margin:0 0 1.2rem 1.2rem; color:var(--grafito); }
.legal li{ margin-bottom:.5rem; line-height:1.6; }
.legal a{ color:var(--verde); text-decoration:underline; }
.legal .ph{ color:var(--arena); font-style:italic; }
.legal__back{ margin-top:3rem; }

/* Casilla de consentimiento en el formulario */
.field--check{ display:flex; align-items:flex-start; gap:.6rem; }
.field--check input{ width:auto; margin-top:.2rem; flex:none; }
.field--check label{ margin:0; text-transform:none; letter-spacing:0; font-size:.82rem; color:var(--grafito); line-height:1.5; }
.field--check a{ color:var(--verde); text-decoration:underline; }

/* ============================================================
   WHATSAPP FLOTANTE
   ============================================================ */
.wa-float{
  position:fixed; bottom:1.5rem; right:1.5rem; z-index:800;
  width:58px; height:58px; border-radius:50%; background:#25D366; color:#fff;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 10px 30px -6px rgba(37,211,102,.5);
  transition:transform .35s var(--ease);
  animation:waPulse 2.6s infinite;
}
.wa-float:hover{ transform:scale(1.08); }
@keyframes waPulse{ 0%{box-shadow:0 0 0 0 rgba(37,211,102,.45)} 70%{box-shadow:0 0 0 16px rgba(37,211,102,0)} 100%{box-shadow:0 0 0 0 rgba(37,211,102,0)} }

/* ============================================================
   ACORDEÓN (bullets desplegables)
   ============================================================ */
.explora{ padding-top:clamp(3rem,7vw,6rem); }
.accordion{ max-width:1100px; margin:0 auto; border-top:1px solid var(--linea); }
.acc{ border-bottom:1px solid var(--linea); scroll-margin-top:88px; }
.acc__head{
  width:100%; background:none; border:0; cursor:pointer; text-align:left;
  display:flex; align-items:center; gap:clamp(1rem,3vw,2.2rem);
  padding:clamp(1.5rem,3.2vw,2.4rem) .2rem;
  transition:padding-left .4s var(--ease);
}
.acc__head:hover{ padding-left:.9rem; }
.acc__num{ font-family:var(--serif); font-size:1rem; color:var(--arena); width:26px; flex:none; letter-spacing:.05em; }
.acc__titles{ flex:1; display:flex; flex-direction:column; gap:.25rem; }
.acc__title{ font-family:var(--serif); font-weight:400; font-size:clamp(1.5rem,3.6vw,2.6rem); line-height:1.05; color:var(--tinta); transition:color .3s; }
.acc__head:hover .acc__title{ color:var(--verde); }
.acc__sub{ font-size:.86rem; letter-spacing:.02em; color:var(--concreto); }
/* Ícono + / − */
.acc__icon{ position:relative; width:26px; height:26px; flex:none; }
.acc__icon::before,.acc__icon::after{
  content:''; position:absolute; top:50%; left:50%; width:20px; height:1.5px;
  background:var(--tinta); transform:translate(-50%,-50%); transition:transform .4s var(--ease), opacity .3s;
}
.acc__icon::after{ transform:translate(-50%,-50%) rotate(90deg); }
.acc.open .acc__icon::after{ opacity:0; transform:translate(-50%,-50%) rotate(0); }
.acc.open .acc__icon::before{ background:var(--verde); }
/* Panel animado */
.acc__panel{ display:grid; grid-template-rows:0fr; transition:grid-template-rows .55s var(--ease); }
.acc__inner{ overflow:hidden; min-height:0; }
.acc.open .acc__panel{ grid-template-rows:1fr; }
.acc__inner > *{ opacity:0; transform:translateY(14px); transition:opacity .6s var(--ease) .12s, transform .6s var(--ease) .12s; }
.acc.open .acc__inner > *{ opacity:1; transform:none; }
.acc__inner{ padding:.2rem .2rem 0; }
.acc.open .acc__inner{ padding-bottom:clamp(2rem,4vw,3.4rem); }
/* Contacto dentro del acordeón (fondo claro) */
.acc .contacto__text p{ color:var(--grafito); }
.acc .contacto__text{ display:flex; flex-direction:column; justify-content:center; }
.acc .contacto__form{ border:1px solid var(--linea); }
.acc .tour__frame{ margin-top:.4rem; }
@media (max-width:768px){
  .acc__head{ gap:1rem; }
  .acc .contacto__inner,.acc .section__grid{ grid-template-columns:1fr; }
}

/* ---------- Acabados & equipamiento ---------- */
.acabados{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(2rem,5vw,4rem); }
.acabados__h{ font-family:var(--serif); font-weight:500; font-size:1.5rem; margin-bottom:1.3rem; color:var(--tinta); }
.checklist{ list-style:none; }
.checklist li{ position:relative; padding:0 0 1rem 1.9rem; color:var(--grafito); font-size:1rem; line-height:1.55; }
.checklist li::before{ content:''; position:absolute; left:0; top:.35em; width:12px; height:7px; border-left:2px solid var(--verde); border-bottom:2px solid var(--verde); transform:rotate(-45deg); }
.brands{ list-style:none; }
.brands li{ padding:0 0 1.1rem; border-bottom:1px solid var(--linea); margin-bottom:1.1rem; }
.brands li:last-child{ border-bottom:0; margin-bottom:0; padding-bottom:0; }
.brand{ display:block; font-family:var(--serif); font-size:1.35rem; letter-spacing:.06em; color:var(--tinta); }
.brand__desc{ display:block; font-size:.92rem; color:var(--grafito); margin-top:.15rem; }
@media (max-width:768px){ .acabados{ grid-template-columns:1fr; gap:2.2rem; } }

/* ---------- Línea de tiempo (fase constructiva) ---------- */
.timeline{ position:relative; padding-left:1.6rem; }
.timeline::before{ content:''; position:absolute; left:6px; top:6px; bottom:6px; width:1px; background:var(--linea); }
.tl{ position:relative; padding-bottom:2.6rem; }
.tl:last-child{ padding-bottom:0; }
.tl__dot{ position:absolute; left:-1.6rem; top:5px; width:13px; height:13px; border-radius:50%; background:var(--off); border:2px solid var(--arena); }
.tl__head{ display:flex; align-items:baseline; gap:.9rem; margin-bottom:.5rem; }
.tl__num{ font-family:var(--serif); color:var(--arena); font-size:1.1rem; }
.tl__title{ font-family:var(--serif); font-weight:500; font-size:1.5rem; line-height:1.1; color:var(--tinta); }
.tl__date{ display:block; font-size:.76rem; letter-spacing:.14em; text-transform:uppercase; color:var(--concreto); margin-top:.2rem; }
.tl__desc{ color:var(--grafito); max-width:60ch; margin-bottom:1rem; }
.tl__media{ display:grid; grid-template-columns:repeat(4,1fr); gap:.7rem; }
.tl__photo{ overflow:hidden; border-radius:3px; aspect-ratio:1/1; }
.tl__photo img{ width:100%; height:100%; object-fit:cover; cursor:zoom-in; transition:transform .6s var(--ease); }
.tl__photo:hover img{ transform:scale(1.06); }
/* Video YouTube (facade: carga solo al hacer clic) */
.yt{ position:relative; border:0; padding:0; cursor:pointer; aspect-ratio:1/1; border-radius:3px; overflow:hidden;
  background-size:cover; background-position:center; background-color:#111; }
.yt__play{ position:absolute; inset:0; margin:auto; width:44px; height:44px; }
.yt__play::before{ content:''; position:absolute; inset:0; margin:auto; width:44px; height:44px; background:rgba(20,18,15,.65); border-radius:50%; transition:.3s; }
.yt__play::after{ content:''; position:absolute; inset:0; margin:auto; width:0; height:0; border-style:solid; border-width:8px 0 8px 13px; border-color:transparent transparent transparent #fff; transform:translateX(2px); }
.yt:hover .yt__play::before{ background:#25D366; }
.yt iframe{ position:absolute; inset:0; width:100%; height:100%; border:0; }
@media (max-width:768px){ .tl__media{ grid-template-columns:repeat(3,1fr); } }
@media (max-width:480px){ .tl__media{ grid-template-columns:repeat(2,1fr); } }

/* ============================================================
   LIGHTBOX / CARRUSEL A PANTALLA COMPLETA
   ============================================================ */
.gallery__item img, .obra__item img{ cursor:zoom-in; }
.lightbox{
  position:fixed; inset:0; z-index:2000; background:rgba(15,14,12,.96);
  display:flex; align-items:center; justify-content:center;
  opacity:0; visibility:hidden; transition:opacity .35s var(--ease), visibility .35s;
}
.lightbox.open{ opacity:1; visibility:visible; }
.lightbox__stage{ max-width:92vw; max-height:86vh; overflow:hidden; display:flex; align-items:center; justify-content:center; }
.lightbox__stage img{
  max-width:92vw; max-height:86vh; object-fit:contain; border-radius:2px;
  transition:transform .35s var(--ease); cursor:zoom-in; user-select:none; -webkit-user-drag:none;
  box-shadow:0 30px 90px -30px rgba(0,0,0,.8);
}
.lightbox__stage img.zoomed{ transform:scale(2.2); cursor:zoom-out; }
.lightbox__close{
  position:absolute; top:18px; right:24px; background:none; border:0; color:#fff;
  font-size:2.6rem; line-height:1; cursor:pointer; opacity:.8; transition:.3s; z-index:2;
}
.lightbox__close:hover{ opacity:1; transform:rotate(90deg); }
.lightbox__nav{
  position:absolute; top:50%; transform:translateY(-50%); background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.25); color:#fff; width:52px; height:52px; border-radius:50%;
  font-size:1.2rem; cursor:pointer; transition:.3s; display:flex; align-items:center; justify-content:center;
}
.lightbox__nav:hover{ background:rgba(255,255,255,.2); }
.lightbox__prev{ left:20px; }
.lightbox__next{ right:20px; }
.lightbox__count{ position:absolute; bottom:22px; left:50%; transform:translateX(-50%);
  color:rgba(255,255,255,.8); font-size:.82rem; letter-spacing:.16em; }
@media (max-width:600px){
  .lightbox__nav{ width:42px; height:42px; }
  .lightbox__prev{ left:8px; } .lightbox__next{ right:8px; }
}

/* ============================================================
   REVEAL AL SCROLL
   ============================================================ */
.reveal{ opacity:0; transform:translateY(34px); transition:opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in{ opacity:1; transform:none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1024px){
  .features{ grid-template-columns:repeat(2,1fr); }
  .obra__grid{ grid-template-columns:repeat(2,1fr); }
  .obra__grid--3{ grid-template-columns:repeat(3,1fr); }
  .gallery{ grid-template-columns:repeat(3,1fr); }
}
@media (max-width:768px){
  .header__nav{
    position:fixed; inset:0; background:var(--tinta); flex-direction:column; justify-content:center;
    gap:1.8rem; transform:translateX(100%); transition:transform .5s var(--ease); mix-blend-mode:normal;
  }
  .header__nav.open{ transform:none; }
  .header__nav a{ color:var(--off) !important; font-size:1rem; }
  .header__burger{ display:flex; z-index:950; }
  .header.solid{ mix-blend-mode:normal; }
  .section__grid{ grid-template-columns:1fr; }
  .contacto__inner{ grid-template-columns:1fr; }
  .specs{ grid-template-columns:repeat(2,1fr); }
  .gallery{ grid-template-columns:repeat(2,1fr); }
  .obra__grid--3{ grid-template-columns:1fr 1fr; }
  .hero__title{ font-size:clamp(3rem,18vw,5rem); }
  .hero__actions{ flex-direction:column; align-items:flex-start; }
  .hero__actions .btn{ width:auto; }
}
@media (max-width:480px){
  .features{ grid-template-columns:1fr; }
  .obra__grid{ grid-template-columns:1fr 1fr; }
}

/* ---------- Accesibilidad: reduce motion ---------- */
@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition:none !important; }
  .reveal{ opacity:1; transform:none; }
}