/* ============================================================
   ANIMATIONS.CSS — Keyframes, scroll reveal, hover effects
   VM Branding House
   ============================================================ */

/* ── Keyframes ── */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeLeft {
  from {
    opacity: 0;
    transform: translateX(32px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeRight {
  from {
    opacity: 0;
    transform: translateX(-32px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleUp {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes lineGrow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

/* ── Hero Animations (auto-fire on load) ── */
.hero-label {
  animation: fadeUp var(--tr-long) var(--ease-out) 0.1s both;
}

.hero-headline {
  animation: fadeUp var(--tr-long) var(--ease-out) 0.25s both;
}

.hero-body {
  animation: fadeUp var(--tr-long) var(--ease-out) 0.45s both;
}

.hero-ctas {
  animation: fadeUp var(--tr-long) var(--ease-out) 0.65s both;
}

/* ── Page Hero Animations ── */
.page-hero-label {
  animation: fadeUp var(--tr-long) var(--ease-out) 0.1s both;
}

.page-hero-title {
  animation: fadeUp var(--tr-long) var(--ease-out) 0.2s both;
}

.page-hero-line {
  animation: fadeUp var(--tr-long) var(--ease-out) 0.35s both;
}

/* ── Scroll Reveal — base state ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity var(--tr-long),
    transform var(--tr-long);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger reveal for children */
.reveal-group > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--tr-long),
    transform var(--tr-long);
}

.reveal-group.visible > *:nth-child(1) { transition-delay: 0ms;   opacity: 1; transform: none; }
.reveal-group.visible > *:nth-child(2) { transition-delay: 80ms;  opacity: 1; transform: none; }
.reveal-group.visible > *:nth-child(3) { transition-delay: 160ms; opacity: 1; transform: none; }
.reveal-group.visible > *:nth-child(4) { transition-delay: 240ms; opacity: 1; transform: none; }
.reveal-group.visible > *:nth-child(5) { transition-delay: 320ms; opacity: 1; transform: none; }

/* Reveal from left */
.reveal-left {
  opacity: 0;
  transform: translateX(-28px);
  transition:
    opacity var(--tr-long),
    transform var(--tr-long);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Reveal from right */
.reveal-right {
  opacity: 0;
  transform: translateX(28px);
  transition:
    opacity var(--tr-long),
    transform var(--tr-long);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale reveal */
.reveal-scale {
  opacity: 0;
  transform: scale(0.96);
  transition:
    opacity var(--tr-long),
    transform var(--tr-long);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* ── Mobile Nav item stagger ── */
.mobile-nav.open .mobile-nav-links a:nth-child(1) { transition-delay: 0.05s; }
.mobile-nav.open .mobile-nav-links a:nth-child(2) { transition-delay: 0.10s; }
.mobile-nav.open .mobile-nav-links a:nth-child(3) { transition-delay: 0.15s; }
.mobile-nav.open .mobile-nav-links a:nth-child(4) { transition-delay: 0.20s; }
.mobile-nav.open .mobile-nav-links a:nth-child(5) { transition-delay: 0.25s; }
.mobile-nav.open .mobile-nav-links a:nth-child(6) { transition-delay: 0.30s; }
.mobile-nav.open .mobile-nav-links a:nth-child(7) { transition-delay: 0.35s; }
.mobile-nav.open .mobile-nav-links a:nth-child(8) { transition-delay: 0.40s; }

/* ── Image Strip hover overlay ── */
.image-strip-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--c-black);
  opacity: 0;
  transition: opacity var(--tr-base);
  z-index: 1;
}

.image-strip-item:hover::after {
  opacity: 0.15;
}

/* ── Section Band entrance ── */
.section-band {
  transform-origin: left;
  animation: lineGrow 0.6s var(--ease-out) both;
}

/* ── Loading shimmer (placeholder) ── */
.shimmer {
  background: linear-gradient(
    90deg,
    var(--c-light) 0%,
    var(--c-chrome) 50%,
    var(--c-light) 100%
  );
  background-size: 800px 100%;
  animation: shimmer 1.8s infinite linear;
}

/* ── Floating element ── */
.float-anim {
  animation: float 4s ease-in-out infinite;
}

/* ── Nav scroll transition ── */
.site-header {
  transition:
    background var(--tr-base),
    border-color var(--tr-base),
    box-shadow var(--tr-base);
}

.site-header.scrolled {
  box-shadow: var(--sh-xs);
}

/* ── Smooth image load ── */
img {
  transition: opacity var(--tr-base);
}

img.loaded {
  opacity: 1;
}

/* ── Service card icon float on hover ── */
.service-card:hover .service-card-num {
  transition: color var(--tr-base);
  color: var(--c-charcoal);
}

/* ── Link underline draw ── */
.underline-anim {
  position: relative;
  display: inline;
}

.underline-anim::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--tr-base);
}

.underline-anim:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ── Reduce motion ── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale,
  .reveal-group > * {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-label,
  .hero-headline,
  .hero-body,
  .hero-ctas,
  .page-hero-label,
  .page-hero-title,
  .page-hero-line {
    animation: none;
    opacity: 1;
    transform: none;
  }
}