.nav-section-link {
  color: #e5e2e1;
  border-bottom: 2px solid transparent;
  padding-bottom: 0.25rem;
  font-weight: 500;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.nav-section-link:hover {
  color: #e30613;
}

.nav-section-link--active {
  color: #e30613;
  border-bottom-color: #e30613;
}

.nav-section-link--active:hover {
  color: #e30613;
}

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

.precision-line {
  height: 2px;
  width: 0;
  transition: width 0.3s ease;
}

.service-card:hover .precision-line {
  width: 100%;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.success-modal {
  animation: slideUp 0.3s ease-out;
}

@keyframes checkmark {
  0% {
    transform: scale(0);
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}

.checkmark-circle {
  animation: checkmark 0.5s ease-out 0.2s both;
}

/* ── Ambient section background — subtle premium texture ── */
/* Works alongside Tailwind bg-* color classes (adds background-image only) */
.ambient-section {
  background-image:
    /* faint brushed-metal horizontal lines */
    repeating-linear-gradient(
      91deg,
      transparent,
      rgba(255, 255, 255, 0.007) 1px,
      transparent 2px
    ),
    /* red glow — top-left corner */
    radial-gradient(ellipse at -8% -15%, rgba(227, 6, 19, 0.09) 0%, transparent 55%),
    /* secondary warm accent — mid-left */
    radial-gradient(ellipse at 0% 60%, rgba(160, 10, 0, 0.04) 0%, transparent 45%),
    /* silver/white reflection — bottom-right */
    radial-gradient(ellipse at 108% 112%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
}

/* ── Hero glow pulse ─────────────────────────────────────── */
@keyframes glow-pulse {
  0%, 100% { opacity: 0.25; }
  50%       { opacity: 0.45; }
}
.hero-glow {
  animation: glow-pulse 7s ease-in-out infinite;
}

/* ── Hero fluid scale (readable when viewport grows / browser zoom out) ── */
.hero-content {
  width: min(100%, clamp(20rem, 92vw, 56rem));
}

.hero-headline {
  font-size: clamp(2.25rem, 4.5vw + 1rem, 4.5rem);
  line-height: 1.1;
}

.hero-tagline {
  font-size: clamp(1rem, 1.25vw + 0.65rem, 1.35rem);
}

.hero-logo {
  width: min(100%, clamp(14rem, 42vw, 38rem));
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 6px 28px rgba(0, 0, 0, 0.55));
}

.hero-bottom-scrim {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 65%;
  background: linear-gradient(
    to top,
    rgba(19, 19, 19, 0.88) 0%,
    rgba(19, 19, 19, 0.45) 35%,
    rgba(19, 19, 19, 0.12) 65%,
    transparent 100%
  );
  pointer-events: none;
}

.hero-brand {
  position: relative;
}

/* ── Button glow ─────────────────────────────────────────── */
.btn-primary {
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 28px rgba(227, 6, 19, 0.3);
  transition: box-shadow 0.3s ease, transform 0.2s ease;
}
.btn-primary:hover {
  box-shadow: 0 0 40px rgba(227, 6, 19, 0.5);
}
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 30%, rgba(255,255,255,0.12) 50%, transparent 70%);
  transform: translateX(-150%);
  transition: transform 0.5s ease;
}
.btn-primary:hover::after {
  transform: translateX(150%);
}

/* ── Service photo cards ─────────────────────────────────── */
.service-photo-card {
  position: relative;
  overflow: hidden;
  border-radius: 0.5rem;
  aspect-ratio: 4 / 3;
  cursor: pointer;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.service-photo-card:hover {
  transform: scale(1.02);
  box-shadow: 0 0 0 1px rgba(227, 6, 19, 0.5), 0 20px 50px rgba(0,0,0,0.6);
}
.service-photo-card .card-bg {
  position: absolute;
  inset: 0;
  transition: transform 0.5s ease;
}
.service-photo-card:hover .card-bg {
  transform: scale(1.05);
}
.service-photo-card .card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.3) 50%, transparent 100%);
}
.service-photo-card .card-hover-accent {
  position: absolute;
  inset: 0;
  background: rgba(227, 6, 19, 0);
  transition: background 0.3s ease;
}
.service-photo-card:hover .card-hover-accent {
  background: rgba(227, 6, 19, 0.08);
}
.service-photo-card .card-content {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 1.5rem;
}
.service-photo-card .precision-line-bottom {
  height: 2px;
  background: #e30613;
  width: 0;
  transition: width 0.35s ease;
  margin-bottom: 0.75rem;
}
.service-photo-card:hover .precision-line-bottom {
  width: 3rem;
}

/* ── ATTRECO watermark ───────────────────────────────────── */
.section-watermark {
  position: absolute;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: clamp(4rem, 12vw, 9rem);
  font-weight: 800;
  color: rgba(255, 255, 255, 0.028);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  left: 50%;
  transform: translateX(-50%);
  top: 0;
  letter-spacing: 0.08em;
  line-height: 1;
}

/* ── Scroll fade-in ──────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
/* stagger children */
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }