/* ==========================================================================
   LATECCSA — styles.css · v1.0 (Home Completo)
   Laboratorio Técnico de Control de Calidad Suelos y Asfaltos
   Dirección A: Precision Laboratory Blue (Tinta sobre Papel / Concreto)
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--color-blue-ink); outline-offset: 3px; }

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

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--color-ink); color: var(--color-white);
  padding: var(--space-3) var(--space-4); z-index: 100;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* --------------------------------------------------------------- BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  min-height: 48px;
  padding: 0 1.375rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  border: 1.5px solid transparent;
  border-radius: var(--radius-sm);
  transition: background-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
  white-space: nowrap;
  cursor: pointer;
}

.btn--primary { background: var(--color-ink); color: var(--color-white); }
.btn--primary:hover { background: var(--color-blue-ink); }

.btn--outline { border-color: var(--color-ink); color: var(--color-ink); }
.btn--outline:hover { background: var(--color-ink); color: var(--color-white); }
.btn--outline .icon-wa { color: var(--color-whatsapp-ink); }
.btn--outline:hover .icon-wa { color: var(--color-whatsapp); }

.btn--sm { min-height: 40px; padding: 0 1rem; font-size: var(--text-sm); }
.btn--full { width: 100%; }

.icon-wa { width: 18px; height: 18px; flex-shrink: 0; }

/* ---------------------------------------------------------------- HEADER */
/* Reading progress indicator */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-blue), #38bdf8, var(--brand-ema));
  z-index: 100;
  transition: width 0.08s linear;
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-rule);
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header--scrolled {
  background: rgba(248, 250, 252, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 4px 20px -2px rgba(11, 19, 32, 0.08);
  border-bottom-color: rgba(1, 160, 254, 0.18);
}

.navbar {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  margin-right: auto;
}

.brand__logo { height: 48px; width: auto; }

.brand__tagline {
  font-size: 0.75rem;
  line-height: 1.3;
  color: var(--color-ink-2);
  padding-left: var(--space-3);
  border-left: 1px solid var(--color-rule);
}

.nav { display: flex; gap: 1.75rem; }

.nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-ink-2);
  text-decoration: none;
  padding-block: 0.375rem;
  border-bottom: 2px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.nav a:hover { color: var(--color-ink); border-color: var(--color-rule); }
.nav a[aria-current="page"] { color: var(--color-ink); border-color: var(--color-blue); }

.navbar__actions { display: flex; align-items: center; gap: var(--space-4); }

.navbar__phone {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  color: var(--color-ink);
}
.navbar__phone:hover { color: var(--color-blue-ink); text-decoration: underline; text-underline-offset: 4px; }

.navbar__toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--color-ink);
  border-radius: var(--radius-sm);
}

/* ------------------------------------------------------------ MOBILE NAV */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: var(--color-paper);
  padding: var(--space-4) var(--container-pad) var(--space-8);
  display: none;
  flex-direction: column;
}
.mobile-nav.is-open { display: flex; }

.mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  border-bottom: 1px solid var(--color-rule);
}

.mobile-nav__close {
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--color-ink);
  border-radius: var(--radius-sm);
}

.mobile-nav__links { margin-top: var(--space-6); }

.mobile-nav__link {
  display: block;
  font-family: var(--font-display);
  font-stretch: var(--stretch-heading);
  font-size: 1.75rem;
  font-weight: 700;
  text-decoration: none;
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--color-rule);
}

.mobile-nav__actions {
  margin-top: auto;
  display: grid;
  gap: var(--space-3);
}

/* ------------------------------------------------------------------ HERO */
@keyframes heroFadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroFadeScale {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(16px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.hero { padding-block: clamp(2.5rem, 6vw, 5.5rem) clamp(3.5rem, 7vw, 6.5rem); }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
}

.hero__eyebrow {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-2);
  margin-bottom: var(--space-6);
  letter-spacing: 0.02em;
  animation: heroFadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.1s backwards;
}

.hero__title {
  font-family: var(--font-display);
  font-stretch: var(--stretch-display);
  font-weight: 800;
  font-size: var(--text-hero);
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
  text-wrap: balance;
  margin-bottom: var(--space-8);
  animation: heroFadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.2s backwards;
}

.hero__lead {
  font-size: var(--text-md);
  color: var(--color-ink-2);
  max-width: 54ch;
  margin-bottom: var(--space-8);
  animation: heroFadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.35s backwards;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
  animation: heroFadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.45s backwards;
}

.credential {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-rule);
  max-width: 560px;
  animation: heroFadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.6s backwards;
}

.hero__figure {
  animation: heroFadeScale 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.25s backwards;
}
.credential__logo { height: 46px; width: auto; flex-shrink: 0; }
.credential__text { font-size: var(--text-sm); line-height: 1.45; color: var(--color-ink-2); }
.credential__text strong { display: block; color: var(--color-ink); font-weight: 600; }
.credential__code { font-family: var(--font-mono); font-weight: 500; color: var(--color-ink); }

.hero__figure img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.figure-caption {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-rule);
  font-size: var(--text-xs);
  line-height: 1.45;
  color: var(--color-ink-3);
}
.figure-caption span:last-child { white-space: nowrap; }

/* -------------------------------------------------------------- SECTIONS */
.section { padding-block: var(--section-y); }
.section--alt { background: var(--color-paper-2); border-top: 1px solid var(--color-rule); }
.section--dark { background: var(--color-ink); color: var(--color-white); }

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-8);
  align-items: end;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-head--single {
  grid-template-columns: 1fr;
  max-width: 720px;
}

.section-title {
  font-family: var(--font-display);
  font-stretch: var(--stretch-heading);
  font-weight: 800;
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.section-title--light { color: var(--color-white); }

.section-intro { font-size: var(--text-md); color: var(--color-ink-2); max-width: 52ch; }
.section-intro--light { color: var(--color-on-dark); }

/* -------------------------------------------------------------- SERVICES */
.service-list { border-top: 2px solid var(--color-ink); }

.service {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr) 260px;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding: clamp(2rem, 3.5vw, 2.75rem) clamp(1rem, 2vw, 1.75rem);
  margin-inline: calc(-1 * clamp(1rem, 2vw, 1.75rem));
  border-bottom: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  align-items: start;
  transition: background-color 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.3s ease;
}

.service::before {
  content: '';
  position: absolute;
  left: 0;
  top: 15%;
  bottom: 15%;
  width: 4px;
  background: var(--color-blue);
  border-radius: 2px;
  opacity: 0;
  transform: scaleY(0.3);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.service:hover {
  background-color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px -4px rgba(11, 19, 32, 0.07);
}

.service:hover::before {
  opacity: 1;
  transform: scaleY(1);
}

.service__title {
  font-family: var(--font-display);
  font-stretch: var(--stretch-heading);
  font-weight: 750;
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: -0.015em;
  margin-bottom: var(--space-3);
  transition: color 0.2s ease;
}

.service:hover .service__title {
  color: var(--color-blue-ink);
}

.service__desc { color: var(--color-ink-2); max-width: 46ch; margin-bottom: var(--space-5); }

.service__link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-weight: 600;
  color: var(--color-blue-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
  transition: color 0.2s ease;
}

.service__link-arrow {
  display: inline-block;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.service:hover .service__link {
  color: var(--color-blue);
  text-decoration-thickness: 2px;
}

.service:hover .service__link-arrow {
  transform: translateX(6px);
}

.service__tests-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-ink-3);
  margin-bottom: var(--space-2);
}

.service__tests li {
  padding-block: 0.625rem;
  border-top: 1px solid var(--color-rule);
  font-size: 0.9375rem;
}
.service__tests li:last-child { border-bottom: 1px solid var(--color-rule); }

.service__media {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.service__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-sm);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.service:hover .service__media img {
  transform: scale(1.05);
}

/* -------------------------------------------------------- DIFERENCIADORES */
.differentiators-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  border-top: 2px solid var(--color-ink);
  padding-top: var(--space-8);
}

.diff-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              background-color 0.3s ease,
              border-color 0.3s ease;
}

.diff-card:hover {
  background: var(--color-white);
  border-color: var(--color-rule);
  transform: translateY(-4px);
  box-shadow: 0 10px 24px -4px rgba(11, 19, 32, 0.06);
}

.diff-card__num {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--color-ink);
  margin-bottom: var(--space-3);
  transition: transform 0.25s ease;
  display: inline-block;
}

.diff-card:hover .diff-card__num {
  transform: scale(1.04);
}

.diff-card__title {
  font-family: var(--font-display);
  font-stretch: var(--stretch-heading);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: var(--space-2);
}

.diff-card__desc {
  font-size: 0.875rem;
  color: var(--color-ink-2);
  line-height: 1.5;
}

/* --------------------------------------------------------------- PROCESO */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  border-top: 2px solid var(--color-ink);
  padding-top: var(--space-8);
}

.process-step {
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              background-color 0.3s ease,
              border-color 0.3s ease;
}

.process-step:hover {
  background: var(--color-white);
  border-color: var(--color-rule);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px -4px rgba(11, 19, 32, 0.06);
}

.process-step__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.process-step__num {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-blue-ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(1, 160, 254, 0.08);
  border: 1.5px solid var(--color-blue);
  flex-shrink: 0;
  transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.process-step:hover .process-step__num {
  background: var(--color-blue);
  color: var(--color-white);
  transform: scale(1.1);
  box-shadow: 0 0 14px rgba(1, 160, 254, 0.4);
}

.process-step__title {
  font-family: var(--font-display);
  font-stretch: var(--stretch-heading);
  font-size: 1.25rem;
  font-weight: 700;
}

.process-step__desc {
  font-size: 0.9375rem;
  color: var(--color-ink-2);
  line-height: 1.55;
}

/* ----------------------------------------------------- PROYECTOS EN OBRA */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  border-top: 2px solid var(--color-ink);
  padding-top: var(--space-8);
}

.project-card {
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.project-card__img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.project-card__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-card__title {
  font-family: var(--font-display);
  font-stretch: var(--stretch-heading);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-1);
}

.project-card__meta {
  font-size: 0.8125rem;
  color: var(--color-ink-3);
  margin-bottom: var(--space-3);
}

.project-card__client {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-blue-ink);
  background: var(--color-paper-2);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-xs);
  align-self: flex-start;
  margin-top: auto;
}

.projects-list-compact {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-rule);
}

.compact-item {
  font-size: 0.875rem;
  color: var(--color-ink-2);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-rule);
}
.compact-item strong { color: var(--color-ink); }

/* ----------------------------------------------------- FORMULARIO COTIZAR */
.quote-layout {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.quote-sidebar h3 {
  font-family: var(--font-display);
  font-stretch: var(--stretch-heading);
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.quote-sidebar p {
  color: var(--color-ink-2);
  margin-bottom: var(--space-6);
  font-size: 0.9375rem;
}

.quote-contact-list li {
  padding-block: var(--space-3);
  border-top: 1px solid var(--color-rule);
  font-size: 0.875rem;
}
.quote-contact-list strong { display: block; color: var(--color-ink); }

.quote-form {
  background: var(--color-white);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  padding: clamp(1.5rem, 3vw, 2.5rem);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group--full { grid-column: 1 / -1; }

.form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-ink);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 0.875rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-ink);
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-xs);
  transition: border-color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  background: var(--color-white);
  border-color: var(--color-ink);
  outline: none;
}

.form-textarea { resize: vertical; min-height: 96px; }

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.8125rem;
  color: var(--color-ink-2);
  line-height: 1.45;
  margin-bottom: var(--space-6);
}

.form-checkbox input { margin-top: 3px; }

.form-feedback {
  padding: var(--space-4);
  border-radius: var(--radius-xs);
  font-size: 0.875rem;
  margin-bottom: var(--space-4);
  display: none;
}
.form-feedback--success { background: oklch(0.94 0.05 153); color: var(--brand-ema); border: 1px solid oklch(0.85 0.1 153); }
.form-feedback--error { background: oklch(0.95 0.05 27); color: var(--color-error); border: 1px solid oklch(0.85 0.1 27); }

/* ---------------------------------------------------------------- FOOTER */
.site-footer {
  background: var(--color-ink);
  color: var(--color-on-dark);
  padding-block: var(--space-16) var(--space-8);
  font-size: var(--text-sm);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer__logo { height: 60px; width: auto; margin-bottom: var(--space-4); }

.footer__title {
  font-family: var(--font-display);
  font-stretch: var(--stretch-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.site-footer li + li { margin-top: var(--space-2); }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--color-white); text-decoration: underline; text-underline-offset: 4px; }

.footer__ema {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-5);
}
.footer__ema-tile { background: var(--color-white); padding: 6px 10px; border-radius: var(--radius-xs); }
.footer__ema-tile img { height: 34px; width: auto; }

.footer__map iframe {
  width: 100%;
  height: 160px;
  border: 0;
  border-radius: var(--radius-xs);
  filter: grayscale(0.8) contrast(1.1);
}

.footer__bottom {
  border-top: 1px solid var(--color-rule-dark);
  padding-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-on-dark-muted);
}

/* ------------------------------------------------------- ANIMACIONES Y REVEAL */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}

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

/* Stagger delays */
.reveal--delay-1 { transition-delay: 100ms; }
.reveal--delay-2 { transition-delay: 200ms; }
.reveal--delay-3 { transition-delay: 300ms; }
.reveal--delay-4 { transition-delay: 400ms; }

/* ----------------------------------------------------- INTERACCIONES FLOTANTES */
/* Pulsing ambient ring for WhatsApp */
@keyframes wa-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.6), var(--shadow-float);
  }
  70% {
    box-shadow: 0 0 0 16px rgba(37, 211, 102, 0), var(--shadow-float);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0), var(--shadow-float);
  }
}

.wa-float {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 50;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-whatsapp);
  color: var(--color-white);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-float);
  transition: transform var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
  animation: wa-pulse 3s infinite;
}

.wa-float:hover {
  background: #1ebe5a;
  transform: scale(1.08);
}

.wa-float svg { width: 28px; height: 28px; }

.wa-float__tooltip {
  position: absolute;
  right: calc(100% + 12px);
  background: var(--color-ink);
  color: var(--color-white);
  font-size: 0.8125rem;
  font-weight: 600;
  white-space: nowrap;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-xs);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateX(8px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.wa-float__tooltip::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 100%;
  transform: translateY(-50%);
  border-width: 5px;
  border-style: solid;
  border-color: transparent transparent transparent var(--color-ink);
}

.wa-float:hover .wa-float__tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* Boton flotante volver arriba */
.back-to-top {
  position: fixed;
  right: 26px;
  bottom: 88px;
  z-index: 49;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-paper);
  color: var(--color-ink);
  border: 1.5px solid var(--color-rule);
  box-shadow: 0 4px 16px rgba(11, 19, 32, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, background-color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  transition: transform 0.2s ease;
}

.back-to-top:hover {
  background: var(--color-ink);
  color: var(--color-white);
  border-color: var(--color-ink);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(11, 19, 32, 0.16);
}

.back-to-top:hover svg {
  transform: translateY(-2px);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Micro-interacciones de tarjetas y botones */
.project-card {
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.3s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(1, 160, 254, 0.35);
  box-shadow: 0 16px 36px -6px rgba(11, 19, 32, 0.12);
}

.project-card picture {
  overflow: hidden;
  display: block;
}

.project-card__img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover .project-card__img {
  transform: scale(1.05);
}

.project-card__client {
  transition: background-color 0.2s ease, color 0.2s ease;
}

.project-card:hover .project-card__client {
  background: rgba(1, 160, 254, 0.12);
  color: var(--color-blue);
}

/* Hero image subtle entrance */
.hero__figure img {
  transition: transform 0.6s var(--ease);
}
.hero__figure:hover img {
  transform: scale(1.02);
}

/* Hover de botones con micro-desplazamiento y brillo */
.btn {
  transition: background-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(11, 19, 32, 0.12);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

/* Focus suave en campos de formulario */
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  background: var(--color-white);
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(1, 160, 254, 0.15);
  outline: none;
}

/* Respeto a usuarios con movimiento reducido */
@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 !important;
    transform: none !important;
  }
}

/* ------------------------------------------------------------ RESPONSIVE */
@media (max-width: 1100px) {
  .brand__tagline { display: none; }
  .nav { gap: 1.25rem; }
  .differentiators-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 920px) {
  .nav, .navbar__phone { display: none; }
  .navbar__toggle { display: inline-flex; }
  .navbar { gap: var(--space-4); }

  .hero__grid { grid-template-columns: 1fr; }
  .hero__figure img { aspect-ratio: 4 / 3; object-position: center 40%; }

  .section-head { grid-template-columns: 1fr; }

  .service { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .service__media { grid-column: 1 / -1; grid-row: 1; }
  .service__media img { aspect-ratio: 16 / 9; }

  .process-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-list-compact { grid-template-columns: 1fr; }

  .quote-layout { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .navbar { height: 64px; }
  .brand__logo { height: 40px; }
  .hero__title { font-stretch: 106%; font-size: clamp(2.125rem, 1.2rem + 4.6vw, 2.75rem); }
  .section-title { font-stretch: 104%; }
  .credential { align-items: flex-start; flex-direction: column; gap: var(--space-3); }
  .credential__text { min-width: 0; }
  .hero__ctas .btn { flex: 1 1 100%; }

  .service { grid-template-columns: 1fr; }
  .differentiators-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .figure-caption { flex-direction: column; gap: var(--space-1); }
}