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

body {
  background: var(--color-primary-strong);
  color: var(--color-graphite);
  font-family: var(--font-family-base);
  font-size: 1rem;
  line-height: 1.6;
}

body.nav-open {
  overflow: hidden;
}

::selection {
  background: var(--color-secondary);
  color: var(--color-white);
}

:focus-visible {
  box-shadow: var(--shadow-focus);
  outline: 2px solid transparent;
  outline-offset: 2px;
}

.skip-link {
  background: var(--color-secondary);
  color: var(--color-white);
  left: var(--space-4);
  padding: var(--space-3) var(--space-4);
  position: fixed;
  top: var(--space-4);
  transform: translateY(-140%);
  transition: transform var(--transition-base);
  z-index: 1000;
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  margin-inline: auto;
  max-width: var(--container-width);
  padding-inline: var(--space-6);
  width: 100%;
}

.section {
  padding-block: var(--space-20);
}

.section--light {
  background: var(--color-primary);
}

.section-header {
  margin-bottom: var(--space-10);
  max-width: 760px;
}

.section-header h2,
.about__content h2,
.applications__content h2,
.contact__content h2,
.quote-cta h2 {
  color: var(--color-white);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin-top: var(--space-2);
}

.section-header p:not(.section-eyebrow),
.about__content p,
.applications__content p,
.contact__content p,
.quote-cta p {
  color: var(--color-muted);
  margin-top: var(--space-4);
  max-width: 680px;
}

.section-eyebrow {
  align-items: center;
  background: var(--color-secondary);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-xs);
  color: var(--color-white);
  display: inline-flex;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  padding: 0.28rem 0.55rem;
  text-transform: uppercase;
}

.btn {
  align-items: center;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  display: inline-flex;
  font-weight: 800;
  gap: var(--space-2);
  justify-content: center;
  line-height: 1.2;
  min-height: 48px;
  padding: 0.82rem 1.15rem;
  text-align: center;
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    color var(--transition-base),
    transform var(--transition-base);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--color-secondary);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-secondary-hover);
}

.btn--secondary {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.34);
  color: var(--color-white);
}

.btn--secondary:hover {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
}

.btn--light {
  background: var(--color-white);
  color: var(--color-primary-strong);
}

.whatsapp-float {
  align-items: center;
  background: var(--color-whatsapp);
  border-radius: 50%;
  bottom: var(--space-6);
  box-shadow: var(--shadow-md);
  display: inline-flex;
  height: 58px;
  justify-content: center;
  position: fixed;
  right: var(--space-6);
  transition:
    transform var(--transition-base),
    filter var(--transition-base);
  width: 58px;
  z-index: 20;
}

.whatsapp-float:hover {
  filter: brightness(1.05);
  transform: translateY(-2px);
}

@media (max-width: 760px) {
  .container {
    padding-inline: var(--space-5);
  }

  .section {
    padding-block: var(--space-16);
  }

  .section-header h2,
  .about__content h2,
  .applications__content h2,
  .contact__content h2,
  .quote-cta h2 {
    font-size: clamp(1.8rem, 8vw, 2.4rem);
  }

  .btn {
    width: 100%;
  }

  .whatsapp-float {
    bottom: var(--space-4);
    height: 54px;
    right: var(--space-4);
    width: 54px;
  }
}