/* ==========================================================================
   SCANDRIVE ELITE — style.css
   Diseño premium, minimalista y tecnológico para diagnóstico automotriz.
   Metodología: BEM. Variables CSS centralizadas. Sin dependencias externas.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. VARIABLES GLOBALES
   -------------------------------------------------------------------------- */
:root {
  /* Colores de marca */
  --color-bg: #050505;
  --color-bg-secondary: #101010;
  --color-bg-elevated: #141414;
  --color-green: #8CD600;
  --color-green-hover: #9BEF00;
  --color-white: #FFFFFF;
  --color-gray: #A0A0A0;
  --color-gray-dim: #6b6b6b;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.14);
  --color-green-border: rgba(140, 214, 0, 0.35);

  /* Tipografía */
  --font-primary: 'Inter', 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;

  /* Escala tipográfica fluida */
  --fs-xs: 0.8125rem;
  --fs-sm: 0.9375rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: clamp(1.75rem, 1.4rem + 1.5vw, 2.5rem);
  --fs-2xl: clamp(2.25rem, 1.6rem + 2.8vw, 3.5rem);
  --fs-3xl: clamp(2.75rem, 1.8rem + 4vw, 4.75rem);

  /* Espaciado */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 9rem;

  /* Layout */
  --container-max: 1280px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  /* Sombra y vidrio */
  --shadow-soft: 0 20px 60px -20px rgba(0, 0, 0, 0.7);
  --shadow-elevated: 0 30px 80px -30px rgba(0, 0, 0, 0.85);
  --glass-bg: rgba(16, 16, 16, 0.65);
  --glass-blur: blur(16px);

  /* Transiciones */
  --ease-standard: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 180ms;
  --dur-base: 320ms;
  --dur-slow: 600ms;

  --header-height: 84px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-white);
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4, p { margin: 0; }

:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--color-green);
  color: #050505;
  padding: 0.75rem 1.25rem;
  font-weight: var(--fw-semibold);
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
}

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

.section {
  padding-block: var(--space-2xl);
}

.section__eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-green);
  margin-bottom: var(--space-sm);
}

.section__title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-extrabold);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.section__title--accent { color: var(--color-green); }

.section__subtitle {
  color: var(--color-gray);
  font-size: var(--fs-md);
  font-weight: var(--fw-regular);
  max-width: 640px;
  margin-top: var(--space-sm);
}

.section__header {
  text-align: center;
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: var(--space-xl);
}

.text-gradient-green {
  background: linear-gradient(90deg, var(--color-green), var(--color-green-hover));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* --------------------------------------------------------------------------
   3. BOTONES
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.95rem 1.75rem;
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-standard),
              background-color var(--dur-fast) var(--ease-standard),
              border-color var(--dur-fast) var(--ease-standard),
              box-shadow var(--dur-fast) var(--ease-standard);
  border: 1px solid transparent;
}

.btn svg { width: 1.1em; height: 1.1em; flex-shrink: 0; }

.btn--primary {
  background-color: var(--color-green);
  color: #08130a;
}
.btn--primary:hover {
  background-color: var(--color-green-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -10px rgba(140, 214, 0, 0.45);
}

.btn--outline {
  background-color: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-white);
}
.btn--outline:hover {
  border-color: var(--color-green);
  color: var(--color-green);
  transform: translateY(-2px);
}

.btn--whatsapp {
  background-color: rgba(140, 214, 0, 0.08);
  border-color: var(--color-green-border);
  color: var(--color-green);
}
.btn--whatsapp:hover {
  background-color: var(--color-green);
  color: #08130a;
}

.btn--sm { padding: 0.65rem 1.15rem; font-size: var(--fs-xs); }
.btn--block { width: 100%; }

/* --------------------------------------------------------------------------
   4. HEADER
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background-color: rgba(5, 5, 5, 0.55);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease-standard),
              background-color var(--dur-base) var(--ease-standard);
}

.header.is-scrolled {
  border-bottom-color: var(--color-border);
  background-color: rgba(5, 5, 5, 0.82);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.brand__mark { width: 40px; height: 40px; }

.brand__name {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand__title {
  font-size: 1.15rem;
  font-weight: var(--fw-extrabold);
  letter-spacing: 0.01em;
}
.brand__title span { color: var(--color-green); }

.brand__subtitle {
  font-size: 0.65rem;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.32em;
  color: var(--color-gray);
  margin-top: 0.3rem;
}

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

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

.nav__link {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-gray);
  padding-block: 0.4rem;
  transition: color var(--dur-fast) var(--ease-standard);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--color-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-standard);
}
.nav__link:hover,
.nav__link:focus-visible,
.nav__link.is-active { color: var(--color-white); }
.nav__link:hover::after,
.nav__link:focus-visible::after,
.nav__link.is-active::after { transform: scaleX(1); }

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
}
.nav-toggle svg { width: 20px; height: 20px; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

/* --------------------------------------------------------------------------
   5. HERO
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-xl);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, rgba(140, 214, 0, 0.10), transparent 70%);
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  color: var(--color-green);
  margin-bottom: var(--space-md);
}
.hero__eyebrow::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 0 4px rgba(140,214,0,.18);
}

.hero__title {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-extrabold);
  letter-spacing: -0.03em;
  line-height: 1.03;
  text-transform: uppercase;
}

.hero__title-line { display: block; }

.hero__kicker {
  display: block;
  margin-top: var(--space-sm);
  font-size: clamp(1rem, 0.85rem + 0.6vw, 1.3rem);
  font-weight: var(--fw-bold);
  letter-spacing: 0.03em;
  color: var(--color-green);
  text-transform: uppercase;
}

.hero__text {
  margin-top: var(--space-md);
  max-width: 46ch;
  color: var(--color-gray);
  font-size: var(--fs-md);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.hero__media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
  box-shadow: var(--shadow-elevated);
}
.hero__media img { width: 100%; height: 100%; object-fit: cover; }

/* --------------------------------------------------------------------------
   6. FEATURE CARDS (Características)
   -------------------------------------------------------------------------- */
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background-color: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.feature-card {
  background-color: var(--color-bg-secondary);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  transition: background-color var(--dur-base) var(--ease-standard),
              transform var(--dur-base) var(--ease-standard);
}

.feature-card:hover {
  background-color: #131a08;
  transform: translateY(-4px);
}

.feature-card__icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-green-border);
  color: var(--color-green);
  transition: box-shadow var(--dur-base) var(--ease-standard),
              transform var(--dur-base) var(--ease-standard);
}
.feature-card__icon svg { width: 28px; height: 28px; }

.feature-card:hover .feature-card__icon {
  box-shadow: 0 0 0 6px rgba(140,214,0,.08);
  transform: scale(1.06);
}

.feature-card__title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   7. ESPECIALIDADES (marcas)
   -------------------------------------------------------------------------- */
.brands-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.brand-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--dur-base) var(--ease-standard),
              transform var(--dur-base) var(--ease-standard),
              box-shadow var(--dur-base) var(--ease-standard);
}
.brand-card:hover {
  border-color: var(--color-green-border);
  transform: translateY(-6px);
  box-shadow: var(--shadow-soft);
}

.brand-card__media {
  aspect-ratio: 4 / 3;
  background-color: #0a0a0a;
  overflow: hidden;
}
.brand-card__media img { width: 100%; height: 100%; object-fit: cover; }

.brand-card__body {
  padding: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.brand-card__badge { width: 36px; height: 36px; flex-shrink: 0; }

.brand-card__name {
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   8. TECNOLOGÍA
   -------------------------------------------------------------------------- */
.tech {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.tech__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
}

.tech__checklist {
  margin-top: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.tech__item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
}
.tech__item svg { width: 22px; height: 22px; color: var(--color-green); flex-shrink: 0; }

/* --------------------------------------------------------------------------
   9. POR QUÉ ELEGIRNOS
   -------------------------------------------------------------------------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.why-card {
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, var(--color-bg-secondary), var(--color-bg));
  transition: transform var(--dur-base) var(--ease-standard), border-color var(--dur-base) var(--ease-standard);
}
.why-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-green-border);
}

.why-card__icon {
  width: 52px; height: 52px;
  color: var(--color-green);
  margin-bottom: var(--space-md);
}
.why-card__icon svg { width: 100%; height: 100%; }

.why-card__title {
  font-size: var(--fs-md);
  font-weight: var(--fw-bold);
  margin-bottom: var(--space-2xs);
}

.why-card__text { color: var(--color-gray); font-size: var(--fs-sm); }

/* --------------------------------------------------------------------------
   10. ESTADÍSTICAS
   -------------------------------------------------------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-xl);
}

.stat { text-align: center; }

.stat__number {
  font-size: clamp(2rem, 1.6rem + 1.6vw, 3.25rem);
  font-weight: var(--fw-extrabold);
  color: var(--color-green);
  letter-spacing: -0.02em;
  line-height: 1;
}

.stat__label {
  margin-top: var(--space-2xs);
  color: var(--color-gray);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
}

/* --------------------------------------------------------------------------
   11. CTA FINAL
   -------------------------------------------------------------------------- */
.cta {
  background: linear-gradient(135deg, var(--color-green), #6ea800);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
  color: #08130a;
}

.cta__title {
  font-size: var(--fs-xl);
  font-weight: var(--fw-extrabold);
  letter-spacing: -0.02em;
}

.cta__text { margin-top: var(--space-2xs); font-weight: var(--fw-medium); opacity: 0.85; }

.cta__actions { display: flex; gap: var(--space-sm); flex-wrap: wrap; }

.cta .btn--outline {
  border-color: rgba(8,19,10,.3);
  color: #08130a;
}
.cta .btn--outline:hover {
  background-color: rgba(8,19,10,.08);
  border-color: #08130a;
  color: #08130a;
}
.cta .btn--primary {
  background-color: #08130a;
  color: var(--color-green);
}
.cta .btn--primary:hover {
  background-color: #101f12;
  box-shadow: 0 12px 30px -10px rgba(8,19,10,.5);
}

/* --------------------------------------------------------------------------
   12. FORMULARIO DE AGENDAMIENTO
   -------------------------------------------------------------------------- */
.booking {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.booking__info-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  background-color: var(--color-bg-secondary);
  margin-top: var(--space-lg);
}

.booking__info-title { font-weight: var(--fw-bold); margin-bottom: var(--space-sm); }

.booking__info-row {
  display: flex;
  justify-content: space-between;
  padding-block: var(--space-2xs);
  font-size: var(--fs-sm);
  color: var(--color-gray);
  border-bottom: 1px dashed var(--color-border);
}
.booking__info-row:last-child { border-bottom: none; }
.booking__info-row strong { color: var(--color-white); font-weight: var(--fw-semibold); }

.form {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form__group { margin-bottom: var(--space-md); }
.form__group--full { grid-column: 1 / -1; }

.form__label {
  display: block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-gray);
  margin-bottom: var(--space-2xs);
}

.form__control {
  width: 100%;
  padding: 0.85rem 1rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  transition: border-color var(--dur-fast) var(--ease-standard);
}
.form__control::placeholder { color: var(--color-gray-dim); }
.form__control:focus { border-color: var(--color-green); }

.form__control.is-invalid { border-color: #e5484d; }

.form__error {
  display: none;
  color: #ff8686;
  font-size: var(--fs-xs);
  margin-top: 0.35rem;
}
.form__group.has-error .form__error { display: block; }
.form__group.has-error .form__control { border-color: #e5484d; }

.form__status {
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  display: none;
}
.form__status.is-visible { display: block; }
.form__status--success {
  background-color: rgba(140,214,0,.1);
  border: 1px solid var(--color-green-border);
  color: var(--color-green-hover);
}

/* --------------------------------------------------------------------------
   13. FOOTER
   -------------------------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-xl) var(--space-lg);
}

.footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-xl);
}

.footer__brand-text {
  margin-top: var(--space-sm);
  color: var(--color-gray);
  font-size: var(--fs-sm);
  max-width: 32ch;
}

.footer__holding {
  margin-top: var(--space-md);
  font-size: var(--fs-xs);
  color: var(--color-gray-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer__heading {
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.footer__list { display: flex; flex-direction: column; gap: var(--space-2xs); }
.footer__link { color: var(--color-gray); font-size: var(--fs-sm); transition: color var(--dur-fast); }
.footer__link:hover { color: var(--color-green); }

.footer__social { display: flex; gap: var(--space-sm); margin-top: var(--space-sm); }
.footer__social-link {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border-strong);
  border-radius: 50%;
  color: var(--color-gray);
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.footer__social-link:hover { color: var(--color-green); border-color: var(--color-green); }
.footer__social-link svg { width: 18px; height: 18px; }

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: var(--fs-xs);
  color: var(--color-gray-dim);
}

/* --------------------------------------------------------------------------
   14. BOTÓN VOLVER ARRIBA / WHATSAPP FLOTANTE
   -------------------------------------------------------------------------- */
.floating-actions {
  position: fixed;
  right: var(--space-md);
  bottom: var(--space-md);
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.floating-btn {
  width: 52px; height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-soft);
  opacity: 0;
  transform: translateY(10px) scale(.9);
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-standard), transform var(--dur-base) var(--ease-standard);
}
.floating-btn.is-visible { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }

.floating-btn--whatsapp {
  background-color: var(--color-green);
  color: #08130a;
  opacity: 1; transform: none; pointer-events: auto;
}
.floating-btn--whatsapp:hover { background-color: var(--color-green-hover); }
.floating-btn--whatsapp svg { width: 26px; height: 26px; }

.floating-btn--top {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  color: var(--color-white);
}
.floating-btn--top svg { width: 20px; height: 20px; }

/* --------------------------------------------------------------------------
   15. UTILIDADES DE ANIMACIÓN (Intersection Observer)
   -------------------------------------------------------------------------- */
[data-animate] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms var(--ease-standard), transform 700ms var(--ease-standard);
}
[data-animate].is-inview {
  opacity: 1;
  transform: translateY(0);
}
[data-animate-delay="1"] { transition-delay: 90ms; }
[data-animate-delay="2"] { transition-delay: 180ms; }
[data-animate-delay="3"] { transition-delay: 270ms; }
[data-animate-delay="4"] { transition-delay: 360ms; }

@media (prefers-reduced-motion: reduce) {
  [data-animate] { opacity: 1; transform: none; transition: none; }
}

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