/* ================================================
   FURNARIUS DESARROLLADORA · Styles
   Paleta monocromo · Chivilcoy, Buenos Aires
   ================================================ */

:root {
  /* Paleta neutros */
  --color-ink:      #0F0F10;  /* negro base */
  --color-charcoal: #1A1A1A;  /* gris oscuro */
  --color-graphite: #3F3F46;  /* gris medio */
  --color-stone:    #78716C;  /* gris cálido texto secundario */
  --color-bone:     #F5F5F4;  /* hueso */
  --color-paper:    #FAFAF9;  /* papel base */
  --color-white:    #FFFFFF;

  --color-border:       rgba(15, 15, 16, 0.08);
  --color-border-dark:  rgba(255, 255, 255, 0.12);

  /* Tipografía */
  --font-display: "DM Serif Display", Georgia, serif;
  --font-sans:    "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Escala */
  --fs-hero:    clamp(3.5rem, 11vw, 8rem);
  --fs-h2:      clamp(2rem, 5vw, 3.75rem);
  --fs-h3:      1.25rem;
  --fs-body:    1rem;
  --fs-small:   0.8125rem;
  --fs-micro:   0.72rem;

  /* Spacing */
  --space-section: clamp(5rem, 10vw, 8.5rem);
  --container-max: 1320px;
  --container-pad: clamp(1.25rem, 5vw, 3rem);

  /* Motion */
  --ease:       cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition: 0.4s var(--ease);
  --transition-slow: 0.8s var(--ease);
}

/* ================================================
   RESET
   ================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--color-graphite);
  background: var(--color-paper);
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; color: inherit; }
ul { list-style: none; }
:focus-visible { outline: 2px solid var(--color-ink); outline-offset: 3px; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* Grano sutil sobre todo el sitio */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

/* ================================================
   HEADER
   ================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: background var(--transition), padding var(--transition),
              box-shadow var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

.header--scrolled {
  background: rgba(250, 250, 249, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 0.65rem 0;
  border-bottom-color: var(--color-border);
}

.header__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.header__logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  transition: filter var(--transition);
  filter: invert(1) brightness(1.1);
}

.header--scrolled .header__logo { filter: none; }

.header__logo-img {
  height: 64px;
  width: auto;
  object-fit: contain;
  transition: height var(--transition);
}

.header--scrolled .header__logo-img { height: 52px; }

@media (max-width: 600px) {
  .header__logo-img { height: 54px; }
  .header--scrolled .header__logo-img { height: 44px; }
}

.header__nav {
  display: none;
  align-items: center;
  gap: 2.25rem;
}

.header__link {
  font-size: var(--fs-micro);
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.88);
  transition: color var(--transition);
  position: relative;
  padding: 0.25rem 0;
}

.header--scrolled .header__link { color: var(--color-graphite); }

.header__link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width var(--transition);
}

.header__link:hover::after { width: 100%; }

.header__link--cta {
  background: var(--color-white);
  color: var(--color-ink) !important;
  padding: 0.7rem 1.5rem;
  border: 1px solid var(--color-white);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.header--scrolled .header__link--cta {
  background: var(--color-ink);
  color: var(--color-white) !important;
  border-color: var(--color-ink);
}

.header__link--cta::after { display: none; }

.header__link--cta:hover {
  background: transparent;
  color: var(--color-white) !important;
  border-color: rgba(255, 255, 255, 0.5);
}

.header--scrolled .header__link--cta:hover {
  background: transparent;
  color: var(--color-ink) !important;
  border-color: var(--color-ink);
}

/* Mobile toggle */
.header__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 10px 6px;
  z-index: 1001;
}

.header__toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-white);
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

.header--scrolled .header__toggle span { background: var(--color-ink); }

.header__toggle--active span { background: var(--color-white) !important; }
.header__toggle--active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.header__toggle--active span:nth-child(2) { opacity: 0; }
.header__toggle--active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.header__nav--open {
  display: flex !important;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--color-ink);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  z-index: 999;
}

.header__nav--open .header__link {
  color: var(--color-white) !important;
  font-size: 1rem;
}

.header__nav--open .header__link--cta {
  margin-top: 1rem;
  background: var(--color-white);
  color: var(--color-ink) !important;
  border-color: var(--color-white);
}

@media (min-width: 900px) {
  .header__nav { display: flex; }
  .header__toggle { display: none; }
}

/* ================================================
   BUTTONS
   ================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2.25rem;
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border-radius: 0;
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-white);
  color: var(--color-ink);
  border-color: var(--color-white);
}
.btn--primary:hover {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.45);
}
.btn--outline:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-1px);
}

.btn--submit {
  background: var(--color-ink);
  color: var(--color-white);
  border-color: var(--color-ink);
  width: 100%;
  padding: 1.15rem 2rem;
}
.btn--submit:hover {
  background: transparent;
  color: var(--color-ink);
  transform: translateY(-1px);
}

/* ================================================
   SECTION HEADERS (editorial)
   ================================================ */
.section-header {
  margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
  max-width: 760px;
}

.section-header--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-header__eyebrow {
  font-size: var(--fs-micro);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-stone);
  margin-bottom: 1.25rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}

.section-header__number {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0;
  color: var(--color-ink);
  padding-right: 0.85rem;
  border-right: 1px solid var(--color-border);
}

.section-header__title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 400;
  line-height: 1.04;
  color: var(--color-ink);
  letter-spacing: -0.015em;
}

.section-header__intro {
  margin-top: 1.5rem;
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--color-stone);
  max-width: 620px;
}

/* ================================================
   HERO
   ================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: var(--color-white);
  background: var(--color-ink);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url("https://images.unsplash.com/photo-1503387762-592deb58ef4e?w=2000&q=85");
  background-size: cover;
  background-position: center;
  filter: grayscale(100%) brightness(0.82) contrast(1.05);
  transform: scale(1.05);
  animation: heroZoom 18s ease-out forwards;
}

@keyframes heroZoom {
  from { transform: scale(1.12); }
  to   { transform: scale(1); }
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15,15,16,0.55) 0%, rgba(15,15,16,0.35) 40%, rgba(15,15,16,0.85) 100%);
}

.hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad) clamp(5rem, 10vw, 7rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: end;
}

.hero__side {
  display: none;
  flex-direction: column;
  gap: 0.5rem;
  padding-bottom: 0.5rem;
  border-left: 1px solid rgba(255, 255, 255, 0.25);
  padding-left: 1.25rem;
}

.hero__side-label {
  font-size: var(--fs-micro);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
}

.hero__side-location {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.9);
}

.hero__main { max-width: 900px; }

.hero__eyebrow {
  font-size: var(--fs-micro);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 1.75rem;
  font-weight: 400;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: 400;
  line-height: 0.9;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
  color: var(--color-white);
}

.hero__tagline {
  font-size: clamp(1.1rem, 2.3vw, 1.4rem);
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.85);
  max-width: 520px;
  margin-bottom: 2.75rem;
  font-weight: 300;
}

.hero__ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

@media (min-width: 900px) {
  .hero__content {
    grid-template-columns: auto 1fr;
    gap: 3.5rem;
  }
  .hero__side { display: flex; }
}

/* ================================================
   01 · IDENTIDAD
   ================================================ */
.identidad {
  padding: var(--space-section) 0;
  background: var(--color-paper);
}

.identidad__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.identidad__body {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.identidad__text {
  font-size: 1.05rem;
  line-height: 1.78;
  color: var(--color-graphite);
  max-width: 620px;
}

.identidad__text:first-child::first-letter {
  font-family: var(--font-display);
  font-size: 3.2rem;
  line-height: 1;
  float: left;
  padding: 0.35rem 0.85rem 0 0;
  color: var(--color-ink);
}

.identidad__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--color-border);
}

.identidad__stat {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.identidad__stat-value {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.identidad__stat-label {
  font-size: var(--fs-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-stone);
  line-height: 1.5;
}

@media (min-width: 900px) {
  .identidad__inner {
    grid-template-columns: 1fr 1.3fr;
    gap: clamp(3rem, 8vw, 6rem);
  }
}

/* ================================================
   02 · SERVICIOS
   ================================================ */
.servicios {
  padding: var(--space-section) 0;
  background: var(--color-ink);
  color: rgba(255, 255, 255, 0.82);
  position: relative;
}

.servicios .section-header__eyebrow { color: rgba(255, 255, 255, 0.55); }
.servicios .section-header__number {
  color: var(--color-white);
  border-right-color: var(--color-border-dark);
}
.servicios .section-header__title { color: var(--color-white); }

.servicios__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--color-border-dark);
}

.servicios__card {
  padding: clamp(2rem, 4vw, 2.75rem) clamp(1.5rem, 3vw, 2rem);
  border-bottom: 1px solid var(--color-border-dark);
  transition: background var(--transition);
  position: relative;
}

.servicios__card:hover { background: rgba(255, 255, 255, 0.02); }

.servicios__card-num {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 1.75rem;
  letter-spacing: 0.02em;
}

.servicios__card-title {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.2vw, 1.75rem);
  font-weight: 400;
  color: var(--color-white);
  margin-bottom: 1rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.servicios__card-text {
  font-size: 0.96rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.68);
  margin-bottom: 1.5rem;
  max-width: 440px;
}

.servicios__card-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.servicios__card-list li {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.55);
  padding-left: 1.25rem;
  position: relative;
  letter-spacing: 0.02em;
}

.servicios__card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72rem;
  width: 8px;
  height: 1px;
  background: rgba(255, 255, 255, 0.35);
}

@media (min-width: 700px) {
  .servicios__grid {
    grid-template-columns: 1fr 1fr;
  }
  .servicios__card:nth-child(odd) { border-right: 1px solid var(--color-border-dark); }
  .servicios__card:nth-last-child(-n+2) { border-bottom: none; }
}

/* ================================================
   03 · PROCESO
   ================================================ */
.proceso {
  padding: var(--space-section) 0;
  background: var(--color-paper);
}

.proceso__timeline {
  display: flex;
  flex-direction: column;
  position: relative;
  gap: 0;
}

.proceso__timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 32px;
  width: 1px;
  background: var(--color-border);
}

.proceso__step {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  padding: 2rem 0;
  position: relative;
}

.proceso__step-number {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--color-ink);
  min-width: 65px;
  text-align: center;
  background: var(--color-paper);
  padding: 0.25rem 0.5rem;
  position: relative;
  z-index: 1;
  border: 1px solid var(--color-border);
}

.proceso__step-content { flex: 1; }

.proceso__step-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--color-ink);
  margin-bottom: 0.5rem;
  letter-spacing: -0.005em;
}

.proceso__step-text {
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--color-stone);
  max-width: 540px;
}

@media (min-width: 850px) {
  .proceso__timeline {
    flex-direction: row;
    justify-content: space-between;
    gap: 0;
  }
  .proceso__timeline::before {
    left: 0;
    right: 0;
    top: 32px;
    bottom: auto;
    width: auto;
    height: 1px;
  }
  .proceso__step {
    flex-direction: column;
    align-items: flex-start;
    flex: 1;
    padding: 0 1.25rem 0 0;
    gap: 1.5rem;
  }
  .proceso__step:last-child { padding-right: 0; }
  .proceso__step-number {
    min-width: auto;
  }
  .proceso__step-text {
    max-width: none;
    padding-right: 1rem;
  }
}

/* ================================================
   04 · OBRAS
   ================================================ */
.obras {
  padding: var(--space-section) 0;
  background: var(--color-bone);
}

.obras__filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: clamp(2rem, 4vw, 3rem);
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.obras__filter {
  padding: 0.6rem 1.4rem;
  font-size: var(--fs-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-graphite);
  border: 1px solid var(--color-border);
  background: transparent;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition);
  font-weight: 500;
}

.obras__filter:hover {
  background: var(--color-paper);
  border-color: var(--color-stone);
}

.obras__filter--active {
  background: var(--color-ink);
  color: var(--color-white);
  border-color: var(--color-ink);
}

.obras__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 640px) {
  .obras__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .obras__grid { grid-template-columns: repeat(3, 1fr); gap: 2rem 1.75rem; }
}

.obras__item { display: flex; flex-direction: column; transition: opacity var(--transition); }
.obras__item--hidden { display: none !important; }

.obras__img-wrap {
  position: relative;
  overflow: hidden;
  background: var(--color-charcoal);
  aspect-ratio: 4 / 5;
}

.obras__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.02);
  transition: transform var(--transition-slow), filter var(--transition-slow);
}

.obras__item:hover .obras__img {
  transform: scale(1.04);
  filter: grayscale(0%) contrast(1);
}

.obras__item-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 1.5rem;
  background: linear-gradient(to top, rgba(15, 15, 16, 0.65), transparent 55%);
  opacity: 0;
  transition: opacity var(--transition);
}

.obras__item:hover .obras__item-overlay { opacity: 1; }

.obras__item-cta {
  font-size: var(--fs-micro);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-white);
  font-weight: 500;
}

.obras__item-body {
  padding: 1.25rem 0 0.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.obras__item-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--color-ink);
  line-height: 1.2;
  letter-spacing: -0.005em;
}

.obras__item-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-stone);
}

/* ================================================
   05 · CONTACTO
   ================================================ */
.contacto {
  padding: var(--space-section) 0;
  background: var(--color-paper);
}

.contacto__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(3rem, 6vw, 5rem);
  align-items: start;
}

.contacto__description {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--color-stone);
  margin-bottom: 2.5rem;
  max-width: 420px;
}

.contacto__details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.contacto__detail {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.contacto__detail-label {
  font-size: var(--fs-micro);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-stone);
  font-weight: 500;
}

.contacto__detail-value {
  font-size: 1rem;
  color: var(--color-ink);
  transition: color var(--transition);
}

a.contacto__detail-value:hover {
  color: var(--color-stone);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Form */
.contacto__form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 600px) {
  .form__row { grid-template-columns: 1fr 1fr; }
}

.form__group { display: flex; flex-direction: column; }

.form__label {
  display: block;
  font-size: var(--fs-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-stone);
  margin-bottom: 0.6rem;
  font-weight: 500;
}

.form__input {
  width: 100%;
  padding: 0.95rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-ink);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 0;
  transition: border-color var(--transition), box-shadow var(--transition),
              background var(--transition);
  outline: none;
}

.form__input:focus {
  border-color: var(--color-ink);
  box-shadow: 0 0 0 3px rgba(15, 15, 16, 0.06);
}

.form__input::placeholder { color: rgba(15, 15, 16, 0.3); }

.form__select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%23111' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1.1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form__textarea {
  resize: vertical;
  min-height: 128px;
  font-family: var(--font-sans);
}

.form__note {
  font-size: var(--fs-micro);
  color: var(--color-stone);
  text-align: center;
  letter-spacing: 0.06em;
  margin-top: -0.25rem;
}

@media (min-width: 900px) {
  .contacto__inner {
    grid-template-columns: 0.85fr 1.15fr;
  }
}

/* ================================================
   FOOTER
   ================================================ */
.footer {
  padding: clamp(3rem, 6vw, 5rem) 0 2rem;
  background: var(--color-ink);
  color: rgba(255, 255, 255, 0.55);
}

.footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-border-dark);
  align-items: start;
}

.footer__brand { display: flex; justify-content: flex-start; }

.footer__logo-img {
  height: 110px;
  width: auto;
  filter: invert(1) brightness(1.1);
  opacity: 0.95;
}

.footer__columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.footer__column {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer__column-title {
  font-size: var(--fs-micro);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 0.35rem;
  font-weight: 500;
}

.footer__column a,
.footer__column span {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition);
  line-height: 1.5;
}

.footer__column a:hover { color: var(--color-white); }

.footer__bottom {
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  justify-content: space-between;
  align-items: flex-start;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer__copy { font-size: 0.82rem; }
.footer__meta { letter-spacing: 0.12em; text-transform: uppercase; font-size: 0.7rem; }

@media (min-width: 800px) {
  .footer__top { grid-template-columns: 1fr 1.5fr; }
  .footer__columns { grid-template-columns: 1fr 1fr; gap: 3rem; }
  .footer__bottom { flex-direction: row; align-items: center; }
}

/* ================================================
   WHATSAPP FLOAT
   ================================================ */
.whatsapp-float {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 54px;
  height: 54px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.35);
  z-index: 998;
  transition: transform var(--transition), box-shadow var(--transition);
}

.whatsapp-float:hover {
  transform: scale(1.08);
  box-shadow: 0 8px 28px rgba(37, 211, 102, 0.5);
}

@media (min-width: 768px) {
  .whatsapp-float { bottom: 2rem; right: 2rem; width: 60px; height: 60px; }
}

/* ================================================
   REVEAL ANIMATIONS
   ================================================ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger reveals inside grids/timelines */
.servicios__grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.servicios__grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.servicios__grid .reveal:nth-child(4) { transition-delay: 0.24s; }

.obras__grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.obras__grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.obras__grid .reveal:nth-child(4) { transition-delay: 0.08s; }
.obras__grid .reveal:nth-child(5) { transition-delay: 0.16s; }
.obras__grid .reveal:nth-child(6) { transition-delay: 0.24s; }

.proceso__timeline .reveal:nth-child(2) { transition-delay: 0.1s; }
.proceso__timeline .reveal:nth-child(3) { transition-delay: 0.2s; }
.proceso__timeline .reveal:nth-child(4) { transition-delay: 0.3s; }

.hero__main .reveal:nth-child(2) { transition-delay: 0.1s; }
.hero__main .reveal:nth-child(3) { transition-delay: 0.22s; }
.hero__main .reveal:nth-child(4) { transition-delay: 0.35s; }

/* ================================================
   REDUCED MOTION
   ================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .hero__bg { animation: none; transform: scale(1); }
}