/* ═══════════════════════════════════════════════
   TurboFan Intelligence — Animations
═══════════════════════════════════════════════ */

/* ── Keyframes ── */

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.8); }
}

@keyframes fade-scroll-hint {
  0%, 100% { opacity: 0.3; transform: translateX(-50%) translateY(0); }
  50%       { opacity: 0.7; transform: translateX(-50%) translateY(6px); }
}

@keyframes particle-flow {
  0%   { left: -20px; opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

@keyframes sensor-pulse-ring {
  0%   { r: 8; opacity: 0.8; }
  100% { r: 22; opacity: 0; }
}

@keyframes sensor-pulse-ring-2 {
  0%   { r: 8; opacity: 0.5; }
  100% { r: 32; opacity: 0; }
}

@keyframes flow-dash {
  0%   { stroke-dashoffset: 100; }
  100% { stroke-dashoffset: 0; }
}

@keyframes engine-glow {
  0%, 100% { opacity: 0.06; }
  50%       { opacity: 0.12; }
}

@keyframes combustor-flicker {
  0%   { opacity: 0.8; transform: scaleX(1)   scaleY(1); }
  25%  { opacity: 0.9; transform: scaleX(1.02) scaleY(0.98); }
  50%  { opacity: 0.75; transform: scaleX(0.98) scaleY(1.02); }
  75%  { opacity: 0.85; transform: scaleX(1.01) scaleY(0.99); }
  100% { opacity: 0.8; transform: scaleX(1)   scaleY(1); }
}

@keyframes fan-spin {
  from { transform-origin: 258px 300px; transform: rotate(0deg); }
  to   { transform-origin: 258px 300px; transform: rotate(360deg); }
}

@keyframes float-panel {
  0%, 100% { transform: translateY(-50%) translateX(0); }
  50%       { transform: translateY(-50%) translateX(-3px); }
}

@keyframes float-panel-right {
  0%, 100% { transform: translateY(-50%) translateX(0); }
  50%       { transform: translateY(-50%) translateX(3px); }
}

@keyframes data-node-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.4); }
  50%       { box-shadow: 0 0 0 8px rgba(0, 212, 255, 0); }
}

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

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

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scale-in {
  from { opacity: 0; transform: scale(0.93); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes hero-orb-1 {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(40px, -30px) scale(1.05); }
  66%  { transform: translate(-20px, 20px) scale(0.98); }
  100% { transform: translate(0, 0) scale(1); }
}

@keyframes hero-orb-2 {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(-30px, 20px) scale(0.96); }
  66%  { transform: translate(20px, -25px) scale(1.04); }
  100% { transform: translate(0, 0) scale(1); }
}

@keyframes nav-line-grow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

@keyframes grid-line-fade {
  0%, 100% { opacity: 0.03; }
  50%       { opacity: 0.07; }
}

/* ── Hero Canvas Particles ── */
/* (handled by JS, but glow effects here) */
#hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 80%, rgba(124, 58, 237, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 80% 20%, rgba(255, 107, 0, 0.03) 0%, transparent 60%);
  pointer-events: none;
}

/* ── Animated background grid ── */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  background-position: center;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
  animation: grid-line-fade 8s ease-in-out infinite;
  pointer-events: none;
}

/* Sensor pulses are rendered on canvas — no CSS needed */

/* ── Info panel float animation ── */
.info-panel-left.visible {
  animation: float-panel 6s ease-in-out infinite;
  animation-delay: 1s;
}
.info-panel-right.visible {
  animation: float-panel-right 6s ease-in-out infinite;
  animation-delay: 1.5s;
}

/* ── Data flow arrow particles ── */
.arrow-particle {
  position: absolute;
  width: 30px;
  height: 2px;
  background: linear-gradient(to right, transparent, var(--cyan, #00d4ff));
  border-radius: 1px;
  animation: particle-flow 1.8s linear infinite;
}

/* ── Scroll-triggered animation classes ── */
[data-animate] {
  opacity: 0;
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-animate="fade-up"] { transform: translateY(24px); }
[data-animate="slide-up"] { transform: translateY(32px); }
[data-animate="scale-in"] { transform: scale(0.93); }
[data-animate].animated {
  opacity: 1;
  transform: none;
}

/* ── Number counter animation ── */
.counter {
  display: inline-block;
  transition: transform 0.3s ease;
}

/* ── Turbofan section background texture ── */
#turbofan-explore::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 50% 50%, rgba(0, 212, 255, 0.03) 0%, transparent 70%),
    radial-gradient(ellipse 30% 30% at 20% 30%, rgba(124, 58, 237, 0.02) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ── Flow diagram node number badges ── */
.flow-node[data-node]::after {
  content: attr(data-node);
  position: absolute;
  top: -8px;
  right: -8px;
  width: 20px;
  height: 20px;
  background: var(--cyan, #00d4ff);
  color: #000;
  font-family: var(--font-mono, monospace);
  font-size: 10px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 20px;
  text-align: center;
}
.flow-node-highlight[data-node]::after {
  background: var(--purple, #7c3aed);
  color: #fff;
}

/* ── CTA form select arrow ── */
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5l3 3 3-3' stroke='%23475569' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

/* ── Gradient border effect on feature cards ── */
.feature-card-large::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: calc(var(--radius-lg, 20px) + 1px);
  padding: 1px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), transparent 50%, rgba(124, 58, 237, 0.1));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.feature-card-large:hover::after { opacity: 1; }

/* ── Metric card shimmer on hover ── */
.metric-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg, 20px);
  background: linear-gradient(
    105deg,
    transparent 30%,
    rgba(0, 212, 255, 0.04) 50%,
    transparent 70%
  );
  background-size: 200% 100%;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.metric-card { position: relative; overflow: hidden; }
.metric-card:hover::after {
  opacity: 1;
  animation: shimmer 1.5s ease infinite;
}

/* ── Loading spinner for form submit ── */
@keyframes spin {
  to { transform: rotate(360deg); }
}
.btn-cta-submit.loading .btn-spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0,0,0,0.3);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ── Noise texture overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-size: 256px 256px;
  opacity: 0.018;
  pointer-events: none;
  z-index: 9999;
}

/* Engine canvas ambient glow via box-shadow on the viewport */
.engine-viewport::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 50% at 50% 55%,
    rgba(0, 212, 255, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

/* ── Dashboard chart bar animation ── */
@keyframes chart-draw {
  from { stroke-dashoffset: 500; }
  to   { stroke-dashoffset: 0; }
}
.dash-chart-card path[stroke] {
  stroke-dasharray: 500;
  stroke-dashoffset: 500;
}
.dashboard-mockup.visible .dash-chart-card path[stroke],
.dashboard-layout.visible .trend-svg path[stroke] {
  animation: chart-draw 1.5s ease forwards;
}

/* ── Problem callout reveal ── */
.problem-callout {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.problem-callout.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Section transition line ── */
section + section::before {
  content: '';
  display: block;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border, rgba(30,74,110,0.4)), transparent);
}