/* ============================================================
   TOKENS
   ============================================================ */
:root {
  --cream: #faf6ee;
  --white: #fffdf9;
  --beige: #f0e6d2;
  --beige-dark: #e3d3b3;
  --line: #ddceac;
  --ink: #1f2b2a;
  --ink-soft: #52605c;
  --petrol: #0f3d3b;
  --petrol-light: #1c6b64;
  --petrol-pale: #e4efec;
  --terracotta: #c1652f;
  --terracotta-light: #e2915d;
  --gold: #b8935a;

  --font-display: 'Fraunces', serif;
  --font-body: 'Inter', sans-serif;

  --container: 1240px;
  --radius: 18px;
  --radius-sm: 10px;
  --ease: cubic-bezier(.16,.84,.44,1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--cream);
  color: var(--ink);
  overflow-x: hidden;
  line-height: 1.5;
}

img, svg { display: block; max-width: 100%; }

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

ul { list-style: none; }

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

/* ============================================================
   PRELOADER
   ============================================================ */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--petrol);
  display: flex;
  align-items: center;
  justify-content: center;
}

.preloader__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

.preloader__mark {
  width: 46px;
  height: 46px;
  opacity: 0;
  transform: translateY(14px) scale(.8);
}

.preloader__drop {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: var(--beige);
  stroke-width: 1.6;
}

.preloader__word {
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 30px);
  letter-spacing: 0.12em;
  color: var(--cream);
  opacity: 0;
  transform: translateY(10px);
}

.preloader__bar {
  width: 220px;
  height: 2px;
  background: rgba(250,246,238,0.18);
  overflow: hidden;
}

.preloader__bar-fill {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--terracotta-light);
}

.preloader__count {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: rgba(250,246,238,0.6);
}

/* ============================================================
   PARTICLES
   ============================================================ */
.particles {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.55;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 14.5px;
  letter-spacing: 0.01em;
  border: none;
  cursor: pointer;
  transition: transform .45s var(--ease), box-shadow .45s var(--ease), background .3s ease, color .3s ease;
  white-space: nowrap;
}

.btn--primary {
  background: var(--petrol);
  color: var(--cream);
  box-shadow: 0 10px 24px -10px rgba(15,61,59,0.55);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 16px 30px -10px rgba(15,61,59,0.6); background: var(--petrol-light); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--line);
}
.btn--ghost:hover { border-color: var(--petrol); background: var(--petrol-pale); transform: translateY(-3px); }

.btn--sm { padding: 11px 22px; font-size: 13.5px; }
.btn--lg { padding: 18px 34px; font-size: 15.5px; }
.btn--block { width: 100%; }

.btn--whatsapp {
  background: #1f8a4c;
  color: #fff;
  box-shadow: 0 10px 24px -10px rgba(31,138,76,0.5);
}
.btn--whatsapp:hover { transform: translateY(-3px); background: #17703c; }
.btn--whatsapp svg { width: 18px; height: 18px; fill: currentColor; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--petrol);
  border-bottom: 1.5px solid var(--petrol);
  padding-bottom: 2px;
  transition: gap .3s var(--ease), color .3s ease;
}
.link-arrow:hover { gap: 14px; color: var(--terracotta); }
.link-arrow--sm { font-size: 13.5px; }

/* ============================================================
   SECTION HEADINGS
   ============================================================ */
.section-tag {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 600;
  line-height: 1.15;
  color: var(--ink);
  max-width: 720px;
}

.section-desc {
  margin-top: 18px;
  font-size: 16.5px;
  color: var(--ink-soft);
  max-width: 560px;
  line-height: 1.7;
}

.section-tag--center, .section-title--center, .section-desc--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* ============================================================
   IMAGE PLACEHOLDERS
   ============================================================ */
.img-placeholder {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  border-radius: var(--radius);
  border: 1.5px dashed var(--beige-dark);
  background:
    repeating-linear-gradient(135deg, rgba(15,61,59,0.035) 0 2px, transparent 2px 14px),
    linear-gradient(160deg, var(--beige) 0%, var(--cream) 100%);
  color: var(--ink-soft);
  overflow: hidden;
}

.img-placeholder svg {
  width: 34px;
  height: 34px;
  fill: none;
  stroke: var(--petrol);
  stroke-width: 1.5;
  opacity: 0.55;
}

.img-placeholder span {
  font-size: 12.5px;
  letter-spacing: 0.03em;
  text-align: center;
  padding: 0 20px;
}

.img-placeholder--tall { min-height: 420px; }
.img-placeholder--square { aspect-ratio: 4/3.4; min-height: 0; }

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 22px 0;
  transition: padding .4s var(--ease), background .4s var(--ease), box-shadow .4s var(--ease);
}

.header.is-scrolled {
  padding: 13px 0;
  background: rgba(250,246,238,0.88);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 30px -14px rgba(31,43,42,0.18);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo__drop {
  width: 26px;
  height: 26px;
  fill: var(--cream);
  transition: fill .4s var(--ease);
}
.header.is-scrolled .logo__drop { fill: var(--petrol); }

.logo__text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16.5px;
  letter-spacing: 0.03em;
  color: var(--cream);
  transition: color .4s var(--ease);
}
.header.is-scrolled .logo__text { color: var(--ink); }

.nav {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav__link {
  position: relative;
  font-size: 14.5px;
  font-weight: 600;
  color: rgba(250,246,238,0.85);
  transition: color .3s ease;
}
.nav__link::after {
  content: '';
  position: absolute;
  left: 0; bottom: -5px;
  width: 0; height: 1.5px;
  background: var(--terracotta-light);
  transition: width .3s var(--ease);
}
.nav__link:hover { color: var(--cream); }
.nav__link:hover::after { width: 100%; }

.header.is-scrolled .nav__link { color: var(--ink-soft); }
.header.is-scrolled .nav__link:hover { color: var(--ink); }
.header.is-scrolled .nav__link::after { background: var(--terracotta); }

.header__actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header__phone {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}
.header__phone-label {
  font-size: 11px;
  color: rgba(250,246,238,0.7);
  transition: color .4s var(--ease);
}
.header__phone-number {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--cream);
  transition: color .4s var(--ease);
}
.header.is-scrolled .header__phone-label { color: var(--ink-soft); }
.header.is-scrolled .header__phone-number { color: var(--petrol); }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  height: 20px;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}
.menu-toggle span {
  height: 2px;
  background: var(--cream);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease, background .4s var(--ease);
}
.header.is-scrolled .menu-toggle span { background: var(--ink); }
.menu-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.is-active span:nth-child(2) { opacity: 0; }
.menu-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   MOBILE MENU
   ============================================================ */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: var(--cream);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 120px 32px 40px;
  transform: translateY(-100%);
  transition: transform .5s var(--ease);
}
.mobile-menu.is-open { transform: translateY(0); }

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.mobile-menu__link {
  display: flex;
  align-items: baseline;
  gap: 16px;
  font-family: var(--font-display);
  font-size: 32px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}
.mobile-menu__link span {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--terracotta);
}

.mobile-menu__footer {
  display: flex;
  gap: 26px;
  font-weight: 600;
}

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

.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.hero__video-fallback {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(184,147,90,0.25), transparent 55%),
    linear-gradient(150deg, var(--petrol) 0%, #0a2b29 60%, #081f1d 100%);
  z-index: -1;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15,61,59,0.35) 0%, rgba(10,35,33,0.65) 70%, rgba(8,25,23,0.85) 100%);
}

.hero__inner {
  position: relative;
  z-index: 2;
  padding-top: 120px;
  padding-bottom: 80px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--beige);
  margin-bottom: 26px;
}

.eyebrow__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--terracotta-light);
  box-shadow: 0 0 0 4px rgba(226,145,93,0.25);
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(40px, 6.4vw, 82px);
  line-height: 1.04;
  color: var(--cream);
  max-width: 900px;
}
.hero__title em { font-style: italic; color: var(--terracotta-light); }

.reveal-line { display: block; overflow: hidden; }
.reveal-line__inner { display: block; will-change: transform; }

.hero__subtitle {
  margin-top: 28px;
  max-width: 560px;
  font-size: 17.5px;
  color: rgba(250,246,238,0.82);
  line-height: 1.7;
}

.hero__actions {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero__actions .btn--ghost { color: var(--cream); border-color: rgba(250,246,238,0.35); }
.hero__actions .btn--ghost:hover { background: rgba(250,246,238,0.1); border-color: var(--cream); }

.hero__stats {
  margin-top: 64px;
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
}

.hero__stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px;
  position: relative;
  padding-left: 20px;
}
.hero__stat::before {
  content: '';
  position: absolute;
  left: 0; top: 6px; bottom: 6px;
  width: 2px;
  background: var(--terracotta-light);
}

.hero__stat-num {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 600;
  color: var(--cream);
}
.hero__stat-suffix {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--terracotta-light);
}
.hero__stat-label {
  width: 100%;
  font-size: 12.5px;
  color: rgba(250,246,238,0.65);
  margin-top: 2px;
}

.hero__scroll {
  position: absolute;
  bottom: 34px;
  left: 32px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(250,246,238,0.7);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero__scroll-line {
  width: 46px; height: 1px;
  background: rgba(250,246,238,0.4);
  position: relative;
  overflow: hidden;
}
.hero__scroll-line::after {
  content: '';
  position: absolute;
  left: -100%; top: 0; bottom: 0; width: 100%;
  background: var(--terracotta-light);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { left: -100%; }
  50% { left: 0; }
  100% { left: 100%; }
}

/* ============================================================
   MARQUEE
   ============================================================ */
.marquee {
  position: relative;
  z-index: 2;
  background: var(--ink);
  overflow: hidden;
  padding: 16px 0;
}

.marquee__track {
  display: flex;
  width: max-content;
  gap: 14px;
  animation: marquee 32s linear infinite;
  white-space: nowrap;
}

.marquee__track span:not(.marquee__dot) {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 500;
  color: var(--beige);
  padding: 0 4px;
}

.marquee__dot { color: var(--terracotta-light); }

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============================================================
   INTRO
   ============================================================ */
.intro { padding: 130px 0; position: relative; z-index: 2; }

.intro__grid {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 80px;
  align-items: center;
}

.intro__panel { height: 460px; }

/* ============================================================
   GALLERY
   ============================================================ */
.gallery {
  padding: 100px 0 130px;
  background: var(--beige);
  position: relative;
  z-index: 2;
}

.gallery__grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.gallery__card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform .5s var(--ease), box-shadow .5s var(--ease);
}
.gallery__card:hover { transform: translateY(-8px); box-shadow: 0 26px 50px -24px rgba(31,43,42,0.25); }

.gallery__img { height: 160px; margin-bottom: 20px; }
.gallery__img svg { width: 30px; height: 30px; }

.gallery__card h3 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 8px;
}
.gallery__card p { font-size: 14.5px; color: var(--ink-soft); line-height: 1.6; }

/* ============================================================
   DETAIL ROWS
   ============================================================ */
.detail { padding: 130px 0; position: relative; z-index: 2; }

.detail__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.detail__row + .detail__row { margin-top: 110px; }

.detail__row--reverse .detail__panel { order: 2; }
.detail__row--reverse .detail__text { order: 1; }

.detail__num {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--terracotta);
  letter-spacing: 0.05em;
}

.detail__text h3 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  margin: 14px 0 18px;
}

.detail__text p {
  font-size: 16px;
  color: var(--ink-soft);
  line-height: 1.75;
  max-width: 480px;
}

.detail__list { margin-top: 24px; display: flex; flex-direction: column; gap: 14px; }
.detail__list li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}
.detail__list li::before {
  content: '';
  position: absolute;
  left: 0; top: 5px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--petrol-pale);
  border: 1.5px solid var(--petrol);
}
.detail__list li::after {
  content: '';
  position: absolute;
  left: 5px; top: 10px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--petrol);
}

/* ============================================================
   MATERIALS
   ============================================================ */
.materials {
  padding: 130px 0;
  background: var(--petrol);
  color: var(--cream);
  position: relative;
  z-index: 2;
}

.materials__head { max-width: 640px; margin-bottom: 60px; }
.materials .section-tag { color: var(--terracotta-light); }
.materials .section-title { color: var(--cream); }
.materials .section-desc { color: rgba(250,246,238,0.75); }

.materials__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.materials__card {
  background: rgba(250,246,238,0.06);
  border: 1px solid rgba(250,246,238,0.14);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .5s var(--ease), background .4s ease, border-color .4s ease;
}
.materials__card:hover {
  transform: translateY(-8px);
  background: rgba(250,246,238,0.1);
  border-color: rgba(226,145,93,0.5);
}

.materials__icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: rgba(226,145,93,0.15);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
}
.materials__icon svg { width: 24px; height: 24px; fill: none; stroke: var(--terracotta-light); stroke-width: 1.6; }

.materials__card h3 { font-family: var(--font-display); font-size: 18.5px; font-weight: 600; margin-bottom: 10px; }
.materials__card p { font-size: 14px; color: rgba(250,246,238,0.7); line-height: 1.65; margin-bottom: 18px; }
.materials__card .link-arrow { color: var(--terracotta-light); border-color: var(--terracotta-light); }
.materials__card .link-arrow:hover { color: var(--cream); }

/* ============================================================
   PROBLEMS
   ============================================================ */
.problems { padding: 130px 0; position: relative; z-index: 2; }

.problems__grid {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 80px;
  align-items: center;
}

.problems__list { margin: 32px 0 36px; display: flex; flex-direction: column; gap: 16px; }
.problems__item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 600;
  font-size: 15px;
}
.problems__item svg { width: 20px; height: 20px; fill: none; stroke: var(--terracotta); stroke-width: 1.7; flex-shrink: 0; }

.problems__panel { height: 480px; }

/* ============================================================
   TANKS
   ============================================================ */
.tanks { padding: 130px 0; background: var(--beige); position: relative; z-index: 2; }

.tanks__grid {
  display: grid;
  grid-template-columns: 0.9fr 1fr;
  gap: 80px;
  align-items: center;
}

.tanks__panel { height: 460px; }

.tanks__list { margin: 32px 0 36px; display: flex; flex-direction: column; gap: 22px; }
.tanks__item { display: flex; gap: 20px; align-items: flex-start; }
.tanks__check {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--petrol);
  color: var(--cream);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 600;
}
.tanks__item p { font-size: 15px; color: var(--ink-soft); line-height: 1.65; padding-top: 8px; }

/* ============================================================
   CERTS / BRANDS
   ============================================================ */
.certs { padding: 130px 0 110px; text-align: center; position: relative; z-index: 2; }

.brands {
  margin-top: 60px;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}

.brands__track {
  display: flex;
  width: max-content;
  gap: 20px;
  animation: marquee 26s linear infinite;
}

.brands__chip {
  padding: 20px 42px;
  border-radius: 100px;
  background: var(--white);
  border: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink-soft);
  white-space: nowrap;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact { padding: 130px 0 150px; position: relative; z-index: 2; }

.contact__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 80px;
  align-items: start;
}

.contact__items { margin: 32px 0 36px; display: flex; flex-direction: column; gap: 18px; }
.contact__item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
  transition: color .3s ease;
}
a.contact__item:hover { color: var(--petrol); }
.contact__item svg { width: 20px; height: 20px; fill: none; stroke: var(--petrol); stroke-width: 1.6; flex-shrink: 0; }

.contact__form {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.form__field { display: flex; flex-direction: column; gap: 8px; }
.form__field label { font-size: 13px; font-weight: 600; color: var(--ink-soft); }

.form__field input,
.form__field select,
.form__field textarea {
  padding: 13px 16px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--cream);
  transition: border-color .3s ease, background .3s ease;
  resize: vertical;
}
.form__field input:focus,
.form__field select:focus,
.form__field textarea:focus {
  outline: none;
  border-color: var(--petrol);
  background: var(--white);
}

.form__note {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--petrol);
  min-height: 18px;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer { background: var(--ink); color: rgba(250,246,238,0.85); position: relative; z-index: 2; }

.footer__inner {
  padding: 90px 0 60px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 50px;
}

.footer .logo__drop { fill: var(--terracotta-light); }
.footer .logo__text { color: var(--cream); }
.footer__brand p { margin-top: 18px; font-size: 14px; line-height: 1.7; color: rgba(250,246,238,0.6); max-width: 320px; }

.footer__col h4 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 18px;
}
.footer__col a {
  display: block;
  font-size: 14px;
  color: rgba(250,246,238,0.6);
  padding: 6px 0;
  transition: color .3s ease;
}
.footer__col a:hover { color: var(--terracotta-light); }

.footer__social { display: flex; gap: 12px; }
.footer__social a {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(250,246,238,0.2);
  display: flex; align-items: center; justify-content: center;
  padding: 0;
}
.footer__social svg { width: 16px; height: 16px; fill: rgba(250,246,238,0.8); }
.footer__social a:hover { background: var(--terracotta); border-color: var(--terracotta); }

.footer__bottom { border-top: 1px solid rgba(250,246,238,0.12); }
.footer__bottom-inner {
  padding: 22px 0;
  font-size: 13px;
  color: rgba(250,246,238,0.5);
}

/* ============================================================
   FLOATING WHATSAPP
   ============================================================ */
.fab-whatsapp {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 80;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: #1f8a4c;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 14px 30px -10px rgba(31,138,76,0.55);
  animation: fabPulse 2.6s ease-in-out infinite;
  transition: transform .3s var(--ease);
}
.fab-whatsapp:hover { transform: scale(1.08); }
.fab-whatsapp svg { width: 27px; height: 27px; fill: #fff; }

@keyframes fabPulse {
  0%, 100% { box-shadow: 0 14px 30px -10px rgba(31,138,76,0.55), 0 0 0 0 rgba(31,138,76,0.35); }
  50% { box-shadow: 0 14px 30px -10px rgba(31,138,76,0.55), 0 0 0 12px rgba(31,138,76,0); }
}

/* ============================================================
   SCROLL REVEALS (estado oculto solo si hay JS/GSAP disponible;
   sin JS el contenido queda visible por defecto)
   ============================================================ */
.js-anim .reveal-left, .js-anim .reveal-right { opacity: 0; }
.js-anim .reveal-left { transform: translateX(-56px); }
.js-anim .reveal-right { transform: translateX(56px); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1080px) {
  .nav { display: none; }
  .menu-toggle { display: flex; }

  .intro__grid, .problems__grid, .tanks__grid, .contact__grid { grid-template-columns: 1fr; gap: 50px; }
  .problems__panel, .tanks__panel, .intro__panel { order: -1; height: 320px; }

  .gallery__grid, .materials__grid { grid-template-columns: repeat(2, 1fr); }

  .detail__row { grid-template-columns: 1fr; gap: 40px; }
  .detail__row--reverse .detail__panel,
  .detail__row--reverse .detail__text { order: initial; }
  .detail__panel { order: -1; }

  .footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .header__phone { display: none; }
  .hero__stats { gap: 30px; }
  .gallery__grid, .materials__grid { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; padding: 70px 0 40px; }
  .contact__form { padding: 28px; }
  .fab-whatsapp { right: 18px; bottom: 18px; width: 52px; height: 52px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}