/* ══════════════════════════════════════════
   ANIMATIONS — Blackwater Welding and Fabrication
   ══════════════════════════════════════════ */

/* ── Reveal states ── */
.reveal-fade {
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
}

.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

.reveal-fade.is-visible,
.reveal-up.is-visible,
.reveal-left.is-visible,
.reveal-right.is-visible {
  opacity: 1;
  transform: none;
}

/* ── Stagger delays ── */
.reveal-up:nth-child(2) { transition-delay: 0.1s; }
.reveal-up:nth-child(3) { transition-delay: 0.2s; }
.reveal-up:nth-child(4) { transition-delay: 0.3s; }

/* ── Hero title overflow container ── */
.hero-title-line1,
.hero-title-line2 {
  display: block;
}

/* ── Scroll line animation ── */
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 0; }
  40%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  60%  { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ── Spark particle float animation ── */
@keyframes sparkFloat {
  0%   { transform: translateY(0) scale(1); opacity: 0; }
  10%  { opacity: var(--spark-opacity, 0.15); }
  90%  { opacity: var(--spark-opacity, 0.15); }
  100% { transform: translateY(var(--spark-drift, -80px)) scale(0.5); opacity: 0; }
}

@keyframes sparkDrift {
  0%, 100% { transform: translateX(0) translateY(0) rotate(0deg); }
  25%      { transform: translateX(var(--sway-x, 12px)) translateY(var(--sway-y, -6px)) rotate(3deg); }
  50%      { transform: translateX(0) translateY(var(--sway-y, -12px)) rotate(0deg); }
  75%      { transform: translateX(var(--sway-x, -8px)) translateY(var(--sway-y, -4px)) rotate(-2deg); }
}

.spark-particle {
  position: absolute;
  width: var(--size, 4px);
  height: var(--size, 4px);
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(255,255,255,0.5);
  pointer-events: none;
  animation: sparkFloat var(--duration, 6s) ease-in-out infinite;
  animation-delay: var(--delay, 0s);
  user-select: none;
}

.spark-particle.float {
  opacity: var(--spark-opacity, 0.10);
  animation: sparkDrift var(--duration, 7s) ease-in-out infinite;
  animation-delay: var(--delay, 0s);
  background: rgba(255,255,255,0.15);
  box-shadow: none;
}

/* ── Glow pulse on hero CTA ── */
@keyframes glowPulse {
  0%, 100% { box-shadow: 0 4px 24px rgba(255,255,255,0.15); }
  50%       { box-shadow: 0 4px 48px rgba(255,255,255,0.35); }
}

.btn-primary {
  animation: glowPulse 3s ease-in-out infinite;
}

.btn-primary:hover {
  animation: none;
}

/* ── Gallery track transition ── */
.gallery-track {
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ── Tab panel transitions ── */
.tab-panel {
  animation: tabFadeIn 0.35s var(--ease-out);
}

@keyframes tabFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

/* ── Counter number ── */
.stat-number {
  transition: color 0.3s ease;
}