/* ==========================================================================
   DAMPER — Landing Page
   Hoja de estilos principal
   Índice:
     1. Tokens de diseño (variables)
     2. Reset y base
     3. Utilidades y layout
     4. Botones
     5. Header / navegación
     6. Hero
     7. Sobre nosotros
     8. Servicios
     9. Ventajas
     10. Galería + Lightbox
     11. Testimonios
     12. Formulario + Contacto
     13. Footer
     14. Botones flotantes
     15. Animaciones (scroll reveal)
     16. Responsive
   ========================================================================== */

/* ---------- 1. TOKENS DE DISEÑO ---------- */
:root {
  /* Color */
  --color-primary: #0B3B66;        /* azul profundo — color predominante */
  --color-primary-light: #1D6FA5;  /* azul secundario, para acentos y gradientes */
  --color-primary-dark: #072944;   /* azul oscuro — header/footer */
  --color-accent: #F2790A;         /* naranja — acentos e íconos */
  --color-accent-strong: #C94E09;  /* naranja calibrado para botones (contraste AA) */
  --color-accent-strong-hover: #A94209;
  --color-white: #FFFFFF;
  --color-ice: #EAF3FA;            /* fondo alternativo con tinte azulado */
  --color-gray-bg: #F5F8FA;
  --color-text: #10202E;
  --color-text-muted: #4C6072;
  --color-border: #DCE6EE;

  /* Radios y sombras */
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --shadow-sm: 0 2px 10px rgba(11, 59, 102, 0.08);
  --shadow-md: 0 16px 40px rgba(11, 59, 102, 0.14);

  /* Tipografía */
  --font-display: 'Poppins', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;

  /* Layout */
  --container-width: 1200px;
  --header-height: 75px;
  --transition-fast: 180ms ease;
  --transition-base: 320ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 2. RESET Y BASE ---------- */
*, *::before, *::after { box-sizing: border-box; }

[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-primary);
  line-height: 1.2;
  margin: 0 0 0.5em;
  font-weight: 700;
}

h1 { font-size: clamp(2.1rem, 4.2vw, 3.4rem); font-weight: 800; }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
h3 { font-size: 1.15rem; font-weight: 600; }

p { margin: 0 0 1em; color: var(--color-text-muted); max-width: 62ch; }

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-primary); }

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

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

button { font-family: inherit; cursor: pointer; }

input, select, textarea { font-family: inherit; font-size: 1rem; }

/* Foco visible accesible en toda la página */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-primary-light);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.8em 1.2em;
  z-index: 999;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

.icon {
  width: 1.35em;
  height: 1.35em;
  vertical-align: -0.3em;
  flex-shrink: 0;
}
.icon-lg { width: 2.4rem; height: 2.4rem; }

/* ---------- 3. UTILIDADES Y LAYOUT ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding-block: clamp(64px, 9vw, 112px);
}
.section-alt { background: var(--color-gray-bg); }

.section-heading {
  max-width: 680px;
  margin-bottom: 48px;
}

.section-lead {
  font-size: 1.05rem;
}

.eyebrow {
  color: var(--color-accent-strong);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  margin-bottom: 0.6em;
}

/* ---------- 4. BOTONES ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.9em 1.8em;
  border-radius: 999px;
  border: 2px solid transparent;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline-offset: 4px; }

.btn-accent {
  background: var(--color-accent-strong);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.btn-accent:hover {
  background: var(--color-accent-strong-hover);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.7);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn-sm { padding: 0.55em 1.1em; font-size: 0.9rem; }
.btn-lg { padding: 1.05em 2.1em; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* Variante outline usada fuera del hero (sobre fondo claro) */
.contact-info .btn-outline {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.contact-info .btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ---------- 5. HEADER / NAVEGACIÓN ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  height: var(--header-height);
  max-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.header-inner .brand {
  height: 100%;
}
.header-inner .brand-icon {
  max-height: 290px;
  position: relative;
  z-index: 10;
}


.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.main-nav ul {
  display: flex;
  gap: 28px;
}
.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.98rem;
  position: relative;
  padding-block: 6px;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--color-accent-strong);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}
.main-nav a:hover::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-whatsapp { color: var(--color-white); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 6px;
  color: var(--color-primary);
}
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

/* ---------- 6. HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: var(--color-white);
  overflow: hidden;
  padding-top: var(--header-height);
}

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

.hero-placeholder-img {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.06), transparent 45%),
    repeating-linear-gradient(135deg, rgba(255,255,255,0.035) 0 2px, transparent 2px 34px),
    linear-gradient(135deg, var(--color-primary-dark), var(--color-primary) 55%, var(--color-primary-light));
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 28px;
}

.placeholder-tag {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  background: rgba(7, 41, 68, 0.55);
  border: 1px dashed rgba(255,255,255,0.5);
  border-radius: 999px;
  padding: 0.4em 1em;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,41,68,0.55) 0%, rgba(7,41,68,0.72) 60%, rgba(7,41,68,0.88) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding-block: 40px;
}

.hero .eyebrow { color: #FFC08A; }

.hero h1 { color: var(--color-white); }

.hero-subtitle {
  color: rgba(255,255,255,0.88);
  font-size: 1.15rem;
  max-width: 56ch;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

.hero-gauge {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.18);
  margin-top: 56px;
}

.gauge-item {
  flex: 1;
  padding: 22px 24px;
  border-right: 1px solid rgba(255,255,255,0.18);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.gauge-item:last-child { border-right: none; }

.gauge-number {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  color: var(--color-white);
}
.gauge-label {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.75);
}

/* ---------- 7. SOBRE NOSOTROS ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
}

.about-badges {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 20px;
  margin-top: 28px;
}
.about-badges li {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.96rem;
}
.about-badges .icon { color: var(--color-accent-strong); }

.about-advantages-block {
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
}

.img-placeholder {
  border-radius: var(--radius-lg);
  background:
    repeating-linear-gradient(45deg, rgba(11,59,102,0.05) 0 2px, transparent 2px 20px),
    linear-gradient(160deg, var(--color-ice), #D7E9F6);
  border: 1px dashed var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  text-align: center;
  padding: 24px;
}
.img-placeholder .placeholder-tag {
  color: var(--color-primary);
  background: rgba(255,255,255,0.7);
  border-color: var(--color-primary-light);
}

.about-placeholder {
  aspect-ratio: 4 / 5;
  box-shadow: var(--shadow-md);
}

/* ---------- 8. SERVICIOS ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  margin-bottom: 18px;
  background: var(--color-ice);
  color: var(--color-primary);
}
.service-card[data-group="frio"] .service-icon {
  background: #FDEBDA;
  color: var(--color-accent-strong);
}

.service-card h3 { margin-bottom: 0.4em; font-size: 1.08rem; }
.service-card p { margin: 0; font-size: 0.94rem; }

/* ---------- PROMOCIONES ---------- */
.promo-scroll-container {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 18px;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
}

.promo-scroll-container::-webkit-scrollbar {
  height: 8px;
}
.promo-scroll-container::-webkit-scrollbar-track {
  background: var(--color-gray-bg);
  border-radius: 999px;
}
.promo-scroll-container::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: 999px;
}
.promo-scroll-container::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

.promo-grid {
  display: flex;
  gap: 28px;
  min-width: min-content;
}

.promo-card {
  flex: 0 0 calc(50% - 14px);
  min-width: 320px;
  scroll-snap-align: start;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.promo-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.promo-placeholder {
  aspect-ratio: 16 / 9;
  width: 100%;
  border-radius: 0;
  border: none;
  border-bottom: 1px dashed var(--color-primary-light);
}

.promo-image {
  aspect-ratio: 16 / 9;
  width: 100%;
  display: block;
  object-fit: contain;
  background-color: #fff;
}

.promo-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.promo-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.promo-title {
  font-size: 1.25rem;
  margin: 0;
  color: var(--color-primary);
}

.promo-price {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-accent-strong);
  white-space: nowrap;
  background: var(--color-ice);
  padding: 0.2em 0.6em;
  border-radius: var(--radius-sm);
}

.promo-subtitle {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}

.promo-content ul {
  list-style: disc;
  padding-left: 1.25rem;
}

ul {
font-size: 0.90rem;
color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}

/* ---------- 9. VENTAJAS ---------- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 36px 28px;
}

.advantage {
  text-align: left;
}
.advantage .icon-lg {
  color: var(--color-primary);
  margin-bottom: 14px;
}
.advantage h3 { margin-bottom: 0.35em; }
.advantage p { font-size: 0.92rem; margin: 0; }

/* ---------- 10. GALERÍA + LIGHTBOX ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.gallery-item { margin: 0; }

.gallery-btn {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.gallery-placeholder {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
  width: 100%;
}

.gallery-zoom {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(11,59,102,0.55);
  color: var(--color-white);
  opacity: 0;
  transition: opacity var(--transition-base);
}
.gallery-btn:hover .gallery-zoom,
.gallery-btn:focus-visible .gallery-zoom { opacity: 1; }

.gallery-item figcaption {
  margin-top: 10px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  text-align: center;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(7, 20, 32, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.lightbox[hidden] { display: none; }

.lightbox-content {
  max-width: 720px;
  width: 100%;
}
.lightbox-placeholder {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
}
.lightbox-caption {
  color: var(--color-white);
  text-align: center;
  margin-top: 16px;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: var(--color-white);
}
.lightbox-nav {
  background: rgba(255,255,255,0.12);
  border: none;
  color: var(--color-white);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 16px;
  flex-shrink: 0;
}
.lightbox-nav:hover { background: rgba(255,255,255,0.24); }

/* ---------- 11. TESTIMONIOS ---------- */
.testimonials { position: relative; }

.testimonial-track {
  display: flex;
  gap: 24px;
  overflow: hidden;
  scroll-behavior: smooth;
}

.testimonial-card {
  flex: 0 0 calc((100% - 48px) / 3);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.stars {
  display: flex;
  gap: 3px;
  color: var(--color-accent-strong);
  margin-bottom: 12px;
}
.stars .icon { width: 1.05em; height: 1.05em; }

.testimonial-card p {
  color: var(--color-text);
  font-size: 0.98rem;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}
.avatar-placeholder {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--color-ice);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.testimonial-author strong {
  display: block;
  font-size: 0.94rem;
  color: var(--color-primary);
}
.testimonial-author span {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.testimonial-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 32px;
}
.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.carousel-btn:hover { background: var(--color-primary); color: var(--color-white); }

.testimonial-dots {
  display: flex;
  gap: 8px;
}
.testimonial-dots button {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: none;
  background: var(--color-border);
  padding: 0;
}
.testimonial-dots button.is-active { background: var(--color-accent-strong); }

/* ---------- 12. FORMULARIO + CONTACTO ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 48px;
  align-items: start;
}

.contact-form {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  margin-top: 24px;
}

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

.form-field {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field label {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-primary);
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 0.75em 0.9em;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(29, 111, 165, 0.15);
  outline: none;
}
.form-field textarea { resize: vertical; min-height: 110px; }

.form-field.has-error input,
.form-field.has-error select,
.form-field.has-error textarea {
  border-color: #C0392B;
}
.form-error {
  color: #C0392B;
  font-size: 0.82rem;
  min-height: 1em;
}

.btn-submit { width: 100%; margin-top: 4px; }

.form-feedback {
  margin-top: 14px;
  font-weight: 600;
  font-size: 0.95rem;
  min-height: 1.4em;
}
.form-feedback.is-success { color: #1E7A46; }
.form-feedback.is-error { color: #C0392B; }

.contact-info-card {
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-top: 24px;
}
.contact-info-card h3 { color: var(--color-white); margin-bottom: 22px; }

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}
.contact-list .icon { color: var(--color-accent); margin-top: 3px; }
.contact-list strong { display: block; color: var(--color-white); font-size: 0.92rem; }
.contact-list span, .contact-list a {
  color: rgba(255,255,255,0.82);
  font-size: 0.94rem;
}
.contact-list a:hover { color: var(--color-white); }
.contact-list em { font-style: normal; opacity: 0.65; font-size: 0.85em; }

.contact-info-card .btn-block { margin-top: 8px; }

/* ---------- 13. FOOTER ---------- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.75);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.footer-brand .brand-name { color: var(--color-white); }
.footer-brand p { color: rgba(255,255,255,0.65); margin-top: 14px; }

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 18px;
}
.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-social a:hover { background: var(--color-accent-strong); color: var(--color-white); }

.footer-links h3, .footer-contact h3 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 18px;
}
.footer-links ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links a, .footer-contact a { color: rgba(255,255,255,0.7); }
.footer-links a:hover, .footer-contact a:hover { color: var(--color-white); }
.footer-contact p { color: rgba(255,255,255,0.7); margin-bottom: 8px; }

.footer-bottom {
  padding-block: 22px;
  font-size: 0.85rem;
  text-align: center;
}

/* ---------- 14. BOTONES FLOTANTES ---------- */
.floating-whatsapp {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25D366;
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 26px rgba(37, 211, 102, 0.45);
  z-index: 90;
  transition: transform var(--transition-fast);
}
.floating-whatsapp .icon { width: 1.8rem; height: 1.8rem; }
.floating-whatsapp:hover { transform: scale(1.08); color: var(--color-white); }

.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 92px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover { background: var(--color-primary-light); }

/* ---------- 15. ANIMACIONES (scroll reveal) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 16. RESPONSIVE ---------- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(3, 1fr); }
  .testimonial-card { flex: 0 0 calc((100% - 24px) / 2); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }
  .main-nav.is-open { max-height: 420px; }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 8px 24px 20px;
  }
  .main-nav a { display: block; padding: 12px 0; }
  .nav-toggle { display: block; }
  .header-whatsapp span { display: none; }

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

  .hero-gauge { flex-wrap: wrap; }
  .gauge-item { flex: 1 1 50%; border-bottom: 1px solid rgba(255,255,255,0.18); }
}

@media (max-width: 640px) {
  .services-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .testimonial-card { flex: 0 0 100%; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form, .contact-info-card { padding: 26px 22px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .footer-grid { grid-template-columns: 1fr; }
  .back-to-top { right: 24px; bottom: 92px; }
}