/* ═══════════════════════════════════════════════════════════
   Cymela — Animations
   Scroll reveals, parallax, micro-interactions, grain
   ═══════════════════════════════════════════════════════════ */

/* ─── Keyframes ─── */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

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

@keyframes scanline {
  0%   { transform: translateY(-100%); }
  100% { transform: translateY(100vh); }
}

@keyframes grain {
  0%, 100% { transform: translate(0, 0); }
  10%  { transform: translate(-5%, -10%); }
  20%  { transform: translate(-15%, 5%); }
  30%  { transform: translate(7%, -25%); }
  40%  { transform: translate(-5%, 25%); }
  50%  { transform: translate(-15%, 10%); }
  60%  { transform: translate(15%, 0%); }
  70%  { transform: translate(0%, 15%); }
  80%  { transform: translate(3%, 35%); }
  90%  { transform: translate(-10%, 10%); }
}

@keyframes borderPulse {
  0%, 100% { border-color: var(--border); }
  50%      { border-color: var(--border-hover); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Scroll Reveal System ─── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out-expo),
              transform 0.8s var(--ease-out-expo);
  will-change: opacity, transform;
}

.reveal--left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s var(--ease-out-expo),
              transform 0.8s var(--ease-out-expo);
  will-change: opacity, transform;
}

.reveal--right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s var(--ease-out-expo),
              transform 0.8s var(--ease-out-expo);
  will-change: opacity, transform;
}

.reveal--scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.8s var(--ease-out-expo),
              transform 0.8s var(--ease-out-expo);
  will-change: opacity, transform;
}

/* Active state when in viewport */
.reveal.is-visible,
.reveal--left.is-visible,
.reveal--right.is-visible,
.reveal--scale.is-visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* Stagger children */
.stagger > *:nth-child(1)  { transition-delay: 0ms; }
.stagger > *:nth-child(2)  { transition-delay: 80ms; }
.stagger > *:nth-child(3)  { transition-delay: 160ms; }
.stagger > *:nth-child(4)  { transition-delay: 240ms; }
.stagger > *:nth-child(5)  { transition-delay: 320ms; }
.stagger > *:nth-child(6)  { transition-delay: 400ms; }
.stagger > *:nth-child(7)  { transition-delay: 480ms; }
.stagger > *:nth-child(8)  { transition-delay: 560ms; }

/* ─── Film Grain Overlay ─── */
.grain::after {
  content: '';
  position: fixed;
  top: -150%;
  left: -150%;
  width: 400%;
  height: 400%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.4'/%3E%3C/svg%3E");
  opacity: 0.025;
  pointer-events: none;
  z-index: var(--z-toast);
  animation: grain 8s steps(10) infinite;
}

/* ─── Scanline Effect (subtle) ─── */
.scanline::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--accent-dim) 50%,
    transparent 100%
  );
  opacity: 0.3;
  z-index: var(--z-toast);
  pointer-events: none;
  animation: scanline 6s linear infinite;
}

/* ─── Parallax Container ─── */
.parallax {
  position: relative;
  overflow: hidden;
}

.parallax__layer {
  position: absolute;
  inset: -20% 0;
  will-change: transform;
  transition: transform 0.1s linear;
}

/* ─── Hover Lift ─── */
.hover-lift {
  transition: transform var(--transition-slow),
              box-shadow var(--transition-slow);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

/* ─── Atmospheric Fog (CSS gradient) ─── */
.fog-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}

.fog-overlay::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(
    to top,
    var(--surface-100) 0%,
    rgba(10, 10, 10, 0.85) 30%,
    rgba(10, 10, 10, 0.4) 60%,
    transparent 100%
  );
}

.fog-overlay::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 30%;
  background: linear-gradient(
    to bottom,
    rgba(10, 10, 10, 0.7) 0%,
    transparent 100%
  );
}

/* ─── Glow Effect ─── */
.glow-accent {
  position: relative;
}

.glow-accent::after {
  content: '';
  position: absolute;
  inset: -1px;
  background: linear-gradient(135deg, var(--accent-dim), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
  z-index: -1;
}

.glow-accent:hover::after {
  opacity: 1;
}

/* ─── Text Shimmer (chrome effect) ─── */
.text-chrome {
  color: #8e8e8e;
}

/* ─── Border Glow on Hover ─── */
.border-glow {
  position: relative;
  overflow: hidden;
}

.border-glow::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--accent-muted),
    transparent
  );
  transition: left 0.6s var(--ease-out-expo);
}

.border-glow:hover::before {
  left: 100%;
}

/* ─── Loading / Skeleton Pulse ─── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--surface-300) 25%,
    var(--surface-400) 50%,
    var(--surface-300) 75%
  );
  background-size: 200% 100%;
  animation: skeleton 1.5s ease-in-out infinite;
}

@keyframes skeleton {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}