/* ============================================
   HELIUM — Ingeniería Ambiental e Hidráulica
   Styles v1.0
   ============================================ */

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

:root {
  --color-bg-dark:    #0d1f2d;
  --color-bg-mid:     #112233;
  --color-bg-light:   #f5f2ee;
  --color-teal:       #1b4055;
  --color-teal-mid:   #245570;
  --color-teal-light: #3a7a98;
  --color-copper:     #3a9db5;
  --color-copper-lt:  #5bbfd5;
  --color-copper-dk:  #267a94;
  --color-cream:      #f5f2ee;
  --color-white:      #ffffff;
  --color-text:       #c2d0da;
  --color-text-light: #8fa3b4;
  --color-border:     rgba(58, 157, 181, 0.2);

  --font-sans:   'Inter', system-ui, sans-serif;
  --font-serif:  'Syne', system-ui, sans-serif;

  --radius:   8px;
  --radius-lg: 16px;
  --shadow:   0 4px 24px rgba(0,0,0,0.3);
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg-dark);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

em {
  font-style: normal;
  color: var(--color-copper-lt);
}

/* ---------- CONTAINER ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-copper);
  color: var(--color-bg-dark);
}
.btn--primary:hover {
  background: var(--color-copper-lt);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(176, 125, 58, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.3);
}
.btn--outline:hover {
  border-color: var(--color-copper);
  color: var(--color-copper-lt);
  transform: translateY(-2px);
}

.btn--full { width: 100%; justify-content: center; }

/* ---------- SECTION TYPOGRAPHY ---------- */
.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-copper);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 620px;
  line-height: 1.8;
  text-align: justify;
}

.section-header {
  margin-bottom: 4rem;
}

/* ---------- SCROLL REVEAL ---------- */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal--delay-1 { transition-delay: 0.12s; }
.reveal--delay-2 { transition-delay: 0.24s; }
.reveal--delay-3 { transition-delay: 0.36s; }

/* ---------- LOGO IMAGES ---------- */
.nav__logo-img {
  height: 58px;
  width: auto;
  display: block;
  transition: height var(--transition);
}
.nav.scrolled .nav__logo-img {
  height: 34px;
}
.footer__logo-img {
  height: 36px;
  width: auto;
  display: block;
  opacity: 0.85;
  margin-bottom: 0.75rem;
}

/* ============================================
   NAV
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.25rem 0;
  transition: background var(--transition), padding var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
  background: rgba(13, 31, 45, 0.97);
  backdrop-filter: blur(12px);
  padding: 0.75rem 0;
  box-shadow: 0 2px 20px rgba(0,0,0,0.4);
}

.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav__logo {
  display: flex;
  align-items: center;
  line-height: 1;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav__link {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}
.nav__link:hover { color: var(--color-white); background: rgba(255,255,255,0.06); }

.nav__link--cta {
  background: var(--color-copper);
  color: var(--color-bg-dark);
  font-weight: 600;
  padding: 0.5rem 1.25rem;
}
.nav__link--cta:hover { background: var(--color-copper-lt); color: var(--color-bg-dark); }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 6rem 2rem 4rem;
}

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

.hero__photo {
  position: absolute;
  inset: 0;
  background: url('../img/hero-bg.jpg') center center / cover no-repeat;
  transform: scale(1.05);
  animation: heroPan 20s ease-in-out infinite alternate;
}
@keyframes heroPan {
  from { transform: scale(1.05) translateX(0); }
  to   { transform: scale(1.05) translateX(-2%); }
}

.hero__gradient {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, rgba(13,31,45,0.78) 0%, rgba(13,31,45,0.60) 55%, rgba(13,31,45,0.25) 100%),
    linear-gradient(to bottom, rgba(13,31,45,0.2) 0%, transparent 40%, rgba(13,31,45,0.65) 100%);
}


.hero__particles {
  position: absolute;
  inset: 0;
}

.hero__deco {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.hero__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-copper);
  margin-bottom: 1.25rem;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero__subtitle {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--color-text-light);
  max-width: 620px;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  text-align: justify;
}

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

.hero__scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-light);
  z-index: 2;
  animation: scrollHintFade 2s ease 2.5s both;
}
@keyframes scrollHintFade { from { opacity: 0; } to { opacity: 1; } }

.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-copper), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}


/* ============================================
   SERVICES
   ============================================ */
.services {
  padding: 7rem 0;
  background: var(--color-bg-dark);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5px;
  background: var(--color-border);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.service-card {
  position: relative;
  background: var(--color-bg-dark);
  padding: 3rem 2.5rem;
  transition: background var(--transition);
  overflow: hidden;
}
.service-card:hover { background: #101e2e; }

.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(176,125,58,0.05) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.service-card:hover::after { opacity: 1; }

.service-card__header {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  margin-bottom: 0;
  cursor: pointer;
  user-select: none;
}

.service-card__head-content {
  flex: 1;
  min-width: 0;
}

.service-card__chevron {
  width: 20px;
  height: 20px;
  color: var(--color-copper);
  margin-left: auto;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}
.service-card.open .service-card__chevron {
  transform: rotate(180deg);
}

.service-card__body {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease, margin-top 0.3s ease;
  opacity: 0;
  margin-top: 0;
}
.service-card.open .service-card__body {
  max-height: 1800px;
  opacity: 1;
  margin-top: 1.25rem;
}

.service-card__icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--color-copper);
  margin-top: 0.2rem;
}


.service-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0;
  font-family: var(--font-serif);
  line-height: 1.2;
}

.service-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.service-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.service-card__list li {
  font-size: 0.82rem;
  color: var(--color-text);
  padding-left: 1rem;
  position: relative;
}
.service-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-copper);
}

.service-card__line {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--color-copper), transparent);
  transition: width 0.6s ease;
}
.service-card:hover .service-card__line { width: 100%; }

/* Bajada + sample tags in card header */
.service-card__bajada {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.65;
  margin-top: 0.5rem;
  margin-bottom: 0.75rem;
}

.service-card__samples {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.service-card__sample-tag {
  font-size: 0.72rem;
  padding: 0.18rem 0.6rem;
  border: 1px solid rgba(176,125,58,0.4);
  border-radius: 100px;
  color: var(--color-copper);
  white-space: nowrap;
}

/* Service items in expanded body */
.service-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.service-item:last-child { border-bottom: none; }
.service-item--hidden { display: none; }

.service-item__name {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.25rem;
}

.service-item__desc {
  font-size: 0.81rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
}

/* Search highlight */
.service-item mark {
  background: rgba(176,125,58,0.3);
  color: var(--color-white);
  border-radius: 2px;
  padding: 0 2px;
}

/* Hidráulica subgroups */
.service-subgroup { margin-bottom: 1.25rem; }
.service-subgroup:last-child { margin-bottom: 0; }

.service-subgroup__title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--color-copper);
  margin-bottom: 0.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(176,125,58,0.2);
}

/* Card with no filter match */
.service-card--no-match {
  opacity: 0.3;
  pointer-events: none;
}

/* Search bar */
.services__search-wrap {
  position: relative;
  margin-bottom: 1.25rem;
}
.services__search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  width: 17px;
  height: 17px;
  color: var(--color-text-light);
  pointer-events: none;
}
.services__search {
  width: 100%;
  max-width: 480px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1rem 0.7rem 2.6rem;
  color: var(--color-white);
  font-size: 0.92rem;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color 0.2s;
}
.services__search::placeholder { color: var(--color-text-light); opacity: 0.7; }
.services__search:focus { border-color: var(--color-copper); }

/* Sector filter chips */
.services__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 2.5rem;
}
.sector-chip {
  padding: 0.3rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  background: transparent;
  color: var(--color-text-light);
  font-size: 0.78rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.sector-chip:hover {
  border-color: var(--color-copper);
  color: var(--color-copper);
}
.sector-chip.active {
  background: var(--color-copper);
  border-color: var(--color-copper);
  color: #0d1f2d;
  font-weight: 600;
}

/* No results */
.services__no-results {
  text-align: center;
  padding: 1.5rem;
  color: var(--color-text-light);
  font-size: 0.92rem;
  margin-bottom: 1rem;
}
.services__no-results a { color: var(--color-copper); text-decoration: underline; }

/* ============================================
   ABOUT
   ============================================ */
.about {
  padding: 7rem 0;
  background: var(--color-bg-mid);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.about__inner--single {
  grid-template-columns: 1fr;
  max-width: 720px;
}

.about__photo {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/5;
  border: 1px solid var(--color-border);
}
.about__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.6) brightness(0.55);
  transition: transform 0.6s ease, filter 0.6s ease;
}
.about__photo:hover img {
  transform: scale(1.03);
  filter: saturate(0.7) brightness(0.65);
}
.about__photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(13,31,45,0.35) 0%, rgba(13,31,45,0.15) 40%, rgba(13,31,45,0.6) 100%);
  pointer-events: none;
}

.about__visual-box {
  position: relative;
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem;
  overflow: hidden;
}

.about__visual-accent {
  position: absolute;
  top: 0; right: 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(176,125,58,0.15) 0%, transparent 70%);
  border-radius: 0 var(--radius-lg) 0 100%;
}

.about__quote blockquote {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--color-white);
  line-height: 1.5;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-copper);
  border: 1px solid rgba(176,125,58,0.35);
  padding: 0.35rem 0.75rem;
  border-radius: 100px;
  background: rgba(176,125,58,0.07);
  transition: var(--transition);
}
.tag:hover {
  background: rgba(176,125,58,0.15);
  border-color: var(--color-copper);
}

.about__content p {
  color: var(--color-text-light);
  margin-bottom: 1rem;
  font-size: 0.95rem;
  line-height: 1.8;
}

.about__features {
  margin: 2rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.about__feature {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-text);
}

.about__feature-dot {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-copper);
  margin-top: 0.45em;
}

/* Dirección técnica */
.about__director {
  margin: 1.75rem 0 1.5rem;
  padding: 1.1rem 1.4rem;
  background: rgba(176,125,58,0.07);
  border-left: 2px solid var(--color-copper);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.about__director p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0;
}
.about__director strong { color: var(--color-white); }

/* Matrículas y registros */
.about__credentials {
  margin-top: 4rem;
  padding-top: 3.5rem;
  border-top: 1px solid var(--color-border);
}

.about__credentials-title {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.875rem;
}

.about__credentials-intro {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 720px;
  margin-bottom: 2rem;
}

/* Marquee */
@keyframes heliumMarquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.hm-viewport {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.hm-viewport:hover .hm-track { animation-play-state: paused; }

.hm-track {
  display: flex;
  width: max-content;
  gap: 12px;
  animation: heliumMarquee 22s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .hm-track {
    animation: none;
    flex-wrap: wrap;
    width: 100%;
  }
}

.hm-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 14px 20px;
  white-space: nowrap;
  background: rgba(255,255,255,0.02);
  transition: border-color 0.2s;
}
.hm-badge:hover { border-color: rgba(176,125,58,0.5); }

.hm-badge svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-copper);
}

.hm-sigla {
  display: block;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.hm-sub {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-light);
  margin-top: 0.15rem;
}

/* ============================================
   SECTORS
   ============================================ */
.sectors {
  padding: 6rem 0;
  background: var(--color-bg-dark);
  border-top: 1px solid var(--color-border);
}

.sectors__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}

.sector-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-align: center;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: var(--transition);
  cursor: default;
}
.sector-item:hover {
  border-color: var(--color-copper);
  color: var(--color-white);
  background: rgba(176,125,58,0.06);
  transform: translateY(-4px);
}

.sector-item__icon {
  width: 36px;
  height: 36px;
  color: var(--color-copper);
  opacity: 0.7;
  transition: opacity var(--transition);
}
.sector-item:hover .sector-item__icon { opacity: 1; }

/* ============================================
   CONTACT
   ============================================ */
.contact {
  position: relative;
  padding: 7rem 0;
  overflow: hidden;
}

.contact__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 50%, rgba(27,64,85,0.35) 0%, transparent 70%),
    var(--color-bg-mid);
}

.contact__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact__info p {
  color: var(--color-text-light);
  margin-bottom: 2rem;
  font-size: 0.95rem;
  line-height: 1.8;
}

.contact__channels {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact__channel {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.contact__channel:hover {
  border-color: var(--color-copper);
  background: rgba(176,125,58,0.07);
  transform: translateX(4px);
}
.contact__channel--no-link { cursor: default; }
.contact__channel--no-link:hover { transform: none; }

.contact__channel-icon {
  width: 36px;
  height: 36px;
  color: var(--color-copper);
  flex-shrink: 0;
}

.contact__channel strong {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: 0.04em;
}
.contact__channel span {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* Form */
.contact__form-wrap {
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

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

.form-group label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-light);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-white);
  transition: border-color var(--transition), background var(--transition);
  outline: none;
  width: 100%;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,0.25); }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-copper);
  background: rgba(176,125,58,0.06);
}

.form-group select { cursor: pointer; }
.form-group select option { background: var(--color-bg-dark); }
.form-group textarea { resize: vertical; min-height: 110px; }

.form-note {
  font-size: 0.75rem;
  color: var(--color-text-light);
  text-align: center;
  margin-top: -0.25rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-bg-dark);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}


.footer__brand p {
  font-size: 0.82rem;
  color: var(--color-text-light);
  line-height: 1.6;
}
.footer__copy {
  margin-top: 1rem;
  font-size: 0.75rem !important;
  color: rgba(143,163,184,0.5) !important;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer__links strong {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 0.25rem;
}
.footer__links a {
  font-size: 0.85rem;
  color: var(--color-text-light);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--color-copper-lt); }

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: rgba(143,163,184,0.4);
}

/* ============================================
   WHATSAPP FAB
   ============================================ */
.whatsapp-fab {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 200;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25d366;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,0.4);
  transition: transform var(--transition), box-shadow var(--transition);
  animation: fabEntrance 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 3s both;
}
@keyframes fabEntrance {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}
.whatsapp-fab:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 8px 32px rgba(37,211,102,0.5);
}
.whatsapp-fab svg { width: 28px; height: 28px; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
.about__inner { grid-template-columns: 1fr; gap: 3rem; }
  .about__visual { order: -1; }
  .sectors__grid { grid-template-columns: repeat(3, 1fr); }
  .footer__inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 600px) {
  .services__grid { grid-template-columns: 1fr; }
  .contact__inner { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 520px) {
  .hero__actions { flex-direction: column; }
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(11,22,34,0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    z-index: 99;
  }
  .nav__links.open { display: flex; }
  .nav__link { font-size: 1.2rem; padding: 0.75rem 2rem; }
  .nav__burger { display: flex; z-index: 100; position: relative; }

  .hero__title { font-size: clamp(2.2rem, 8vw, 3.5rem); }
  .hero__subtitle br { display: none; }

  .sectors__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .footer__bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
.sectors__grid { grid-template-columns: repeat(2, 1fr); }
  .about__visual-box { padding: 2rem; }
  .contact__form-wrap { padding: 1.5rem; }
}