:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #737373;
  --line: #e6e6e6;
  --overlay: rgba(0, 0, 0, 0.34);
  --header-height: 92px;
  font-family: Arial, Helvetica, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.4;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.logo-img{
    display:block;
    width: 140px;      /* cambia este valor según tu logo */
    height:auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 46px;
  background: rgba(255, 255, 255, 0.94);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  letter-spacing: .02em;
}

.brand-mark {
  font-size: 30px;
  line-height: 1;
  font-weight: 500;
}

.brand-text {
  font-size: 17px;
  font-weight: 400;
}

.desktop-nav > ul {
  display: flex;
  align-items: center;
  gap: 36px;
}

.desktop-nav a,
.menu-button,
.close-button,
.accordion {
  font: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  color: var(--text);
}

.desktop-nav li { position: relative; }

.desktop-nav a {
  display: block;
  padding: 10px 0;
}

.has-submenu:hover > .submenu,
.has-submenu:focus-within > .submenu {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.submenu {
  position: absolute;
  top: 100%;
  left: -18px;
  min-width: 178px;
  padding: 12px 18px;
  background: #fff;
  box-shadow: 0 10px 30px rgba(0,0,0,.08);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
}

.submenu li a {
  padding: 7px 0;
  white-space: nowrap;
  color: #222;
}

.submenu-right {
  top: 0;
  left: calc(100% + 18px);
}

.menu-button { display: none; }

/* Banner propuesta 3 */

.hero-slider {
  padding-top: var(--header-height);
}

.classic-slider {
  position: relative;
  width: 100%;
  height: calc(100vh - var(--header-height));
  min-height: 560px;
  overflow: hidden;
  background: #eee;
}

.classic-track {
  height: 100%;
  display: flex;
  transition: transform .75s cubic-bezier(.76, 0, .24, 1);
}

.classic-slide {
  position: relative;
  min-width: 100%;
  height: 100%;
}

.slide-link {
  display: block;
  position: relative;
  width: 100%;
  height: 100%;
}

.slider-image {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
}

.slider-img-1{
background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.128), rgba(0, 0, 0, 0.728)), url('img/lastrancas/portada.png');
}

.slider-img-2 {
  background-image: linear-gradient(135deg, rgba(218, 218, 218, 0.077), rgb(0, 0, 0)), url('img/flutek/portada_flutek.png');
}

.slider-img-3 {
background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.128), rgba(0, 0, 0, 0.728)), url('img/casatt/portada_casatt.png');
}

.project-caption {
  position: absolute;
  left: 46px;
  bottom: 46px;
  color: #fff;
  z-index: 2;
}

.project-caption h1 {
  margin: 0 0 8px;
  font-size: clamp(42px, 7vw, 96px);
  line-height: .9;
  font-weight: 400;
  letter-spacing: -.06em;
}

.project-caption p {
  margin: 0;
  font-size: 13px;
  letter-spacing: .05em;
}

.classic-btn {
  position: absolute;
  z-index: 4;
  top: 50%;
  transform: translateY(-50%);
  border: 0;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255,255,255,.75);
  color: #111;
  font-size: 38px;
  line-height: 48px;
  cursor: pointer;
}

.classic-prev { left: 26px; }
.classic-next { right: 26px; }

.classic-dots {
  position: absolute;
  z-index: 4;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}

.classic-dots button {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid #fff;
  background: transparent;
  cursor: pointer;
}

.classic-dots button.active {
  background: #fff;
}

/* Grilla propuesta 1 */

.project-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 26vw;
  gap: 0;
}

.project-card {
  position: relative;
  overflow: hidden;
  min-height: 260px;
  background: #d8d8d8;
  background-image: linear-gradient(120deg, #d8d8d8, #f0f0f0), var(--img);
  background-size: cover;
  background-position: center;
  isolation: isolate;
}

.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay);
  opacity: 0;
  transition: opacity .24s ease;
  z-index: -1;
}

.project-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--img);
  background-size: cover;
  background-position: center;
  filter: grayscale(7%);
  transform: scale(1);
  transition: transform .45s ease, filter .45s ease;
  z-index: -2;
}

.project-card span {
  position: absolute;
  left: 24px;
  bottom: 22px;
  color: #fff;
  font-size: 15px;
  letter-spacing: .01em;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .24s ease, transform .24s ease;
}

.project-card:hover::before { opacity: 1; }
.project-card:hover::after { transform: scale(1.035); filter: grayscale(0%); }
.project-card:hover span { opacity: 1; transform: translateY(0); }

.project-card.tall { grid-row: span 2; }
.project-card.wide { grid-column: span 2; }

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 92px;
  padding: 28px 46px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.social-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.site-footer a:hover,
.desktop-nav a:hover { color: #000; }

.back-top { white-space: nowrap; }

.mobile-panel {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(86vw, 380px);
  z-index: 100;
  background: #fff;
  padding: 32px;
  box-shadow: -20px 0 50px rgba(0,0,0,.12);
  transform: translateX(100%);
  transition: transform .28s ease;
}

.mobile-panel.is-open {
  transform: translateX(0);
}

.close-button {
  margin-bottom: 32px;
  color: var(--muted);
}

.mobile-list > li { border-bottom: 1px solid var(--line); }

.mobile-list a,
.accordion {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 0;
}

.accordion::after {
  content: "+";
  float: right;
}

.accordion.is-open::after { content: "−"; }

.accordion-panel {
  display: none;
  padding-left: 18px;
}

.accordion-panel.is-open { display: block; }

.accordion-panel.inner { color: var(--muted); }

@media (max-width: 1100px) {
  .project-grid {
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 34vw;
  }
}

@media (max-width: 760px) {
  :root { --header-height: 76px; }

  .site-header {
    padding: 22px 22px;
  }

  .brand-mark { font-size: 26px; }
  .brand-text { font-size: 15px; }

  .desktop-nav { display: none; }
  .menu-button { display: block; }

  .classic-slider {
    height: calc(86vh - var(--header-height));
    min-height: 460px;
  }

  .project-caption {
    left: 22px;
    right: 22px;
    bottom: 34px;
  }

  .classic-btn {
    width: 44px;
    height: 44px;
    font-size: 30px;
    line-height: 40px;
  }

  .classic-prev { left: 14px; }
  .classic-next { right: 14px; }

  .project-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 72vw;
  }

  .project-card,
  .project-card.tall,
  .project-card.wide {
    grid-row: auto;
    grid-column: auto;
    min-height: 320px;
  }

  .project-card::before { opacity: .15; }

  .project-card span {
    opacity: 1;
    transform: none;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    padding: 28px 22px;
  }
}


/* AJUSTES FINALES: NAVBAR SIMPLE + AIRE PARA TÍTULO DEL BANNER */

.site-header {
  height: 92px;
  padding: 28px 46px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: none;
}

.simple-nav {
  display: flex;
  align-items: center;
  gap: 42px;
  font-size: 16px;
}

.simple-nav a {
  color: #111;
  text-decoration: none;
}

.simple-nav a:hover {
  opacity: .55;
}

.desktop-nav,
.menu-button,
.mobile-panel {
  display: none !important;
}

.project-caption {
  left: 64px;
  bottom: 150px;
  max-width: 900px;
}

.project-caption h1 {
  font-size: clamp(64px, 8.5vw, 132px);
  line-height: .88;
  letter-spacing: -.075em;
  margin-bottom: 16px;
}

.project-caption p {
  font-size: 15px;
  font-weight: 600;
}

.classic-btn {
  width: 48px;
  height: 48px;
  font-size: 34px;
  line-height: 44px;
  background: rgba(255,255,255,.82);
}

@media (max-width: 760px) {
  .site-header {
    height: 76px;
    padding: 22px;
  }

  .simple-nav {
    gap: 22px;
    font-size: 14px;
  }

  .project-caption {
    left: 24px;
    right: 24px;
    bottom: 105px;
  }

  .project-caption h1 {
    font-size: clamp(46px, 16vw, 72px);
  }
}


/* PÁGINA DE PRESENTACIÓN DE PROYECTO */

.project-page {
  background: #fff;
  color: #111;
}

.project-page .site-header {
  position: fixed;
}

.project-presentation {
  padding-top: 92px;
}

.project-cover {
  position: relative;
  min-height: calc(100vh - 92px);
  display: flex;
  align-items: flex-end;
  padding: 0 46px 92px;
  overflow: hidden;

}


.project-cover::before{
    content:"";
    position:absolute;
    inset:0;

    background-size:cover;
    background-position:center;
    background-repeat:no-repeat;

    z-index:0;
}

/* REFUGIO LAS TRANCAS */
.project-cover-lastrancas::before {
    background-image: url("img/lastrancas/foto_1.png");
}

/* FLUTEK */
.project-cover-flutek::before{
    background-image: url("img/flutek/flutek_1.png");
}

/* CASA TT */
.project-cover-casa::before{
    background-image: url("img/casatt/portada_casatt.png");
}

/* CASA MAUCO */
.project-cover-mauco::before{
    background-image: url("img/casamauco/mauco_1.png");
}

.project-cover-content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 1200px;
}

.project-cover-content .eyebrow {
  display: block;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.project-cover-content h1 {
  margin: 0;
  font-size: clamp(72px, 14vw, 210px);
  line-height: .82;
  font-weight: 400;
  letter-spacing: -.085em;
}

.project-cover-content p {
  max-width: 620px;
  margin: 28px 0 0;
  font-size: 20px;
  line-height: 1.45;
}

.project-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid #e2e2e2;
  border-top: 1px solid #e2e2e2;
}

.project-meta article {
  padding: 34px 46px;
  border-right: 1px solid #e2e2e2;
}

.project-meta article:last-child {
  border-right: 0;
}

.project-meta span {
  display: block;
  margin-bottom: 12px;
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #777;
}

.project-meta strong {
  font-size: 17px;
  font-weight: 400;
}

.project-text-block {
  display: grid;
  grid-template-columns: .8fr 1.4fr;
  gap: 80px;
  padding: 110px 46px;
}

.project-text-block h2 {
  margin: 0;
  font-size: clamp(38px, 5vw, 82px);
  line-height: .94;
  font-weight: 400;
  letter-spacing: -.06em;
}

.project-text-block p {
  margin: 0;
  max-width: 760px;
  font-size: 22px;
  line-height: 1.5;
  color: #333;
}

.project-gallery-page {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
}

.project-gallery-page figure {
  margin: 0;
  min-height: 52vw;
  background-size: cover;
  background-position: center;
}

.project-gallery-page .large {
  grid-column: span 2;
  min-height: 75vw;
}

.gallery-vsp-1 {
  background-image: url("/img/lastrancas/foto_2.png");
}

.gallery-vsp-2 {
  background-image: url('/img/lastrancas/foto_3.png');
}

.gallery-vsp-3 {
  background-image: url('/img/lastrancas/foto_4.png');
}

.gallery-vsp-4 {
  background-image: url('/img/lastrancas/foto_5.png');
}

.project-next {
  padding: 54px 46px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid #e2e2e2;
  font-size: 14px;
}

.project-next a {
  text-transform: uppercase;
  letter-spacing: .08em;
}

@media (max-width: 760px) {
  .project-presentation {
    padding-top: 76px;
  }

  .project-cover {
    min-height: calc(92vh - 76px);
    padding: 0 22px 72px;
  }

  .project-cover-content p {
    font-size: 17px;
  }

  .project-meta {
    grid-template-columns: 1fr;
  }

  .project-meta article {
    padding: 24px 22px;
    border-right: 0;
    border-bottom: 1px solid #e2e2e2;
  }

  .project-text-block {
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 72px 22px;
  }

  .project-text-block p {
    font-size: 18px;
  }

  .project-gallery-page {
    grid-template-columns: 1fr;
  }

  .project-gallery-page figure,
  .project-gallery-page .large {
    grid-column: auto;
    min-height: 82vw;
  }

  .project-next {
    padding: 34px 22px;
    gap: 22px;
    flex-direction: column;
  }
}
/* ============================================
    PROYECTO FLUTEK
============================================ */

.gallery-flutek-1{
    background-image:url("img/flutek/flutek_2.png");
}

.gallery-flutek-2{
    background-image:url("img/flutek/flutek_3.png");
}

.gallery-flutek-3{
    background-image:url("img/flutek/flutek_4.png");
}

.gallery-flutek-4{
    background-image:url("img/flutek/flutek_5.png");
}

/* ============================================
    CASA TT
============================================ */

.project-cover-casa-tt::before{
    background-image:url("img/casatt/tt_1.png");
}

.gallery-casa-tt-1{
    background-image:url("img/casatt/tt_2.png");
}

.gallery-casa-tt-2{
    background-image:url("img/casatt/tt_3.png");
}

.gallery-casa-tt-3{
    background-image:url("img/casatt/tt_4.png");
}

.gallery-casa-tt-4{
    background-image:url("img/casatt/tt_1.png");
}

/* ============================================
    CASA MAUCO
============================================ */

.project-cover-casa-mauco::before{
    background-image:url("img/casamauco/mauco_1.png");
}

.gallery-casa-mauco-1{
    background-image: url("img/casamauco/mauco_2.png");
}

.gallery-casa-mauco-2{
    background-image:url("img/casamauco/mauco_3.png");
}

.gallery-casa-mauco-3{
    background-image:url("img/casamauco/mauco_4.png");
}

.gallery-casa-mauco-4{
    background-image:url("img/casamauco/mauco_5.png");
}