/* Extreme visuals and animations for ChemPilot
   - Fullscreen canvas overlay for particles
   - Animated neon gradient layers
   - Toggle control styles
*/

:root{
  --visual-toggle-size:48px;
  --visual-primary: #3a86ff;
  --visual-secondary: #ff006e;
  --visual-accent: #8338ec;
}

/* Canvas overlay sits on top but behind UI elements which have z-index >=2 */
#visuals-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1000;
  mix-blend-mode: screen;
  opacity: 0.95;
}

/* Animated extreme gradient (background layer) */
.extreme-gradient {
  position: fixed;
  inset: 0;
  z-index: 900;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(58,134,255,0.08), rgba(131,56,236,0.06), rgba(255,0,110,0.05));
  background-size: 400% 400%;
  animation: extremeGradient 18s ease-in-out infinite;
  filter: contrast(1.05) saturate(1.2) blur(20px);
}

@keyframes extremeGradient{
  0%{background-position:0% 50%;}
  50%{background-position:100% 50%;}
  100%{background-position:0% 50%;}
}

/* Noise/film grain overlay for intensity */
.visuals-noise {
  position: fixed;
  inset: 0;
  z-index: 1100;
  pointer-events: none;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="120" height="120"><filter id="f"><feTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="1" stitchTiles="stitch"/></filter><rect width="100%" height="100%" filter="url(%23f)" opacity="0.02"/></svg>');
  mix-blend-mode: overlay;
}

/* Icon appearance animation (used site-wide) */
.icon-appear {
  opacity: 0;
  transform: translateY(12px) scale(0.96);
  transition: opacity 700ms cubic-bezier(.2,.9,.2,1), transform 700ms cubic-bezier(.2,.9,.2,1);
}

.icon-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.feature-card, .stat-card {
  transform-origin: center;
  transition: transform 700ms ease, box-shadow 300ms ease;
}

.feature-card.appeared, .stat-card.appeared {
  transform: translateY(0) scale(1);
}

/* Respect user motion preferences */
@media (prefers-reduced-motion: reduce) {
  .extreme-gradient, #visuals-canvas, .visuals-noise { display: none !important; }
  .visuals-toggle { display: none !important; }
}

/* Background video wrapper */
.bg-video-wrapper {
  position: fixed;
  inset: 0;
  z-index: 0; /* behind all content (header z-index: 10, modals z-index > 1000) */
  pointer-events: none;
  overflow: hidden;
  width: 100vw;
  height: 100vh;
  /* Fallback gradient if video fails to load */
  background: linear-gradient(135deg, 
    rgba(58, 134, 255, 0.4) 0%, 
    rgba(131, 56, 236, 0.3) 35%, 
    rgba(255, 0, 110, 0.25) 70%, 
    rgba(4, 6, 14, 0.5) 100%);
  animation: bgGradient 15s ease infinite;
}

@keyframes bgGradient {
  0%, 100% {
    background: linear-gradient(135deg, 
      rgba(58, 134, 255, 0.4) 0%, 
      rgba(131, 56, 236, 0.3) 35%, 
      rgba(255, 0, 110, 0.25) 70%, 
      rgba(4, 6, 14, 0.5) 100%);
  }
  50% {
    background: linear-gradient(225deg, 
      rgba(58, 134, 255, 0.35) 0%, 
      rgba(131, 56, 236, 0.35) 35%, 
      rgba(255, 0, 110, 0.3) 70%, 
      rgba(4, 6, 14, 0.55) 100%);
  }
}

.bg-video-wrapper video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(1.4) contrast(1.1) saturate(1.05);
}

/* Ensure body is positioned relative so z-index context works */
body.video-bg {
  position: relative;
}

/* Darken overlay to improve text contrast over video */
body.video-bg::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 1; /* between video (0) and content (2+) */
  background: rgba(0, 0, 0, 0.15);
  pointer-events: none;
}

/* Theme adjustments when background video is enabled */
.video-bg {
  --primary-color: #7bdff6;
  --secondary-color: #b68cff;
  --accent-color: #ff7ab6;
  --dark-bg: rgba(4,6,14,0.6);
  --darker-bg: rgba(2,3,8,0.6);
  --glass-bg: rgba(255,255,255,0.03);
  --glass-border: rgba(255,255,255,0.06);
  --glass-shadow: 0 10px 40px rgba(0,0,0,0.5);
  color: #eaf6ff;
}

.video-bg .header {
  background: linear-gradient(180deg, rgba(0,0,0,0.35), rgba(0,0,0,0.15));
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.video-bg .footer {
  background: linear-gradient(180deg, rgba(0,0,0,0.45), rgba(0,0,0,0.65));
}

.video-bg .btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.video-bg .btn-outline {
  border-color: rgba(255,255,255,0.12);
  color: rgba(230,245,255,0.95);
}

@media (max-width: 768px) {
  .bg-video-wrapper iframe { min-width: 300vw; min-height: 160vw; }
}