/* ═══════════════════════════════════════════════════════════════
   OCTOPILOT — Animation System
   Keyframes · Scroll Reveals · Micro-interactions · Stagger
   ═══════════════════════════════════════════════════════════════ */

/* ────────────────────────────────────
   A. Keyframes
   ──────────────────────────────────── */

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slide-in-left {
  from {
    opacity: 0;
    transform: translateX(-60px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slide-in-right {
  from {
    opacity: 0;
    transform: translateX(60px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px var(--accent-glow); }
  50%      { box-shadow: 0 0 40px var(--accent-glow), 0 0 80px rgba(196, 20, 32, 0.1); }
}

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

@keyframes border-trace {
  0%   { background-position: 0% 0%; }
  25%  { background-position: 100% 0%; }
  50%  { background-position: 100% 100%; }
  75%  { background-position: 0% 100%; }
  100% { background-position: 0% 0%; }
}

@keyframes signal-pulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50%      { opacity: 1; transform: scale(1.5); }
}

@keyframes float-gentle {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

@keyframes rotate-slow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

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

@keyframes text-reveal-mask {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}

@keyframes line-draw {
  from { stroke-dashoffset: 1000; }
  to   { stroke-dashoffset: 0; }
}

@keyframes particle-drift {
  0%   { transform: translate(0, 0) scale(1); opacity: 0; }
  10%  { opacity: 0.6; }
  90%  { opacity: 0.6; }
  100% { transform: translate(var(--dx, 80px), var(--dy, -120px)) scale(0.3); opacity: 0; }
}

@keyframes typing-cursor {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0; }
}


/* ────────────────────────────────────
   B. Scroll Reveal System
   ──────────────────────────────────── */

/* Base: hidden state for all reveal elements */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 1.2s var(--ease-out),
    transform 1.2s var(--ease-out);
  will-change: opacity, transform;
}

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

/* Variant: reveal from left */
.reveal--left {
  transform: translateX(-40px);
}

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

/* Variant: reveal from right */
.reveal--right {
  transform: translateX(40px);
}

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

/* Variant: reveal with scale */
.reveal--scale {
  transform: scale(0.95);
}

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

/* Variant: reveal with no movement (just fade) */
.reveal--fade {
  transform: none;
}


/* ────────────────────────────────────
   C. Stagger Delay Utilities
   ──────────────────────────────────── */

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.22s; }
.delay-3 { transition-delay: 0.34s; }
.delay-4 { transition-delay: 0.46s; }
.delay-5 { transition-delay: 0.58s; }
.delay-6 { transition-delay: 0.70s; }
.delay-7 { transition-delay: 0.82s; }
.delay-8 { transition-delay: 0.94s; }
.delay-9 { transition-delay: 1.06s; }
.delay-10 { transition-delay: 1.18s; }


/* ────────────────────────────────────
   D. Micro-interaction Classes
   ──────────────────────────────────── */

/* Hover: subtle lift */
.hover-lift {
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* Hover: compress click */
.hover-press {
  transition: transform 0.2s var(--ease-spring);
}

.hover-press:hover {
  transform: scale(0.98);
}

.hover-press:active {
  transform: scale(0.95);
}

/* Hover: glow border */
.hover-glow {
  transition: border-color 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}

.hover-glow:hover {
  border-color: var(--border-accent);
  box-shadow: 0 0 30px rgba(196, 20, 32, 0.12);
}

/* Hover: border shimmer effect */
.hover-shimmer {
  position: relative;
}

.hover-shimmer::after {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  bottom: -1px;
  border-radius: inherit;
  background: linear-gradient(
    90deg,
    transparent,
    var(--accent-glow),
    transparent
  );
  background-size: 200% 100%;
  opacity: 0;
  z-index: -1;
  transition: opacity 0.4s;
}

.hover-shimmer:hover::after {
  opacity: 1;
  animation: shimmer 2s linear infinite;
}


/* ────────────────────────────────────
   E. Ambient Motion Classes
   ──────────────────────────────────── */

.anim-float {
  animation: float-gentle 6s var(--ease-in-out) infinite;
}

.anim-pulse {
  animation: pulse-glow 3s var(--ease-in-out) infinite;
}

.anim-gradient {
  background-size: 200% 200%;
  animation: gradient-drift 8s ease infinite;
}

.anim-rotate {
  animation: rotate-slow 30s linear infinite;
}

.anim-signal {
  animation: signal-pulse 2s var(--ease-in-out) infinite;
}


/* ────────────────────────────────────
   F. Hero Entrance Choreography
   ──────────────────────────────────── */

.hero-entrance {
  opacity: 0;
}

.hero-entrance.is-loaded {
  animation: fade-in-up 1s var(--ease-out) forwards;
}

.hero-entrance--eyebrow.is-loaded {
  animation-delay: 0.2s;
}

.hero-entrance--headline.is-loaded {
  animation-delay: 0.4s;
}

.hero-entrance--sub.is-loaded {
  animation-delay: 0.6s;
}

.hero-entrance--cta.is-loaded {
  animation-delay: 0.8s;
}

.hero-entrance--chips.is-loaded {
  animation-delay: 1.0s;
}

.hero-entrance--robot.is-loaded {
  animation: scale-in 1.2s var(--ease-out) forwards;
  animation-delay: 0.3s;
}


/* ────────────────────────────────────
   G. Signal Transfer Line (connecting sections)
   ──────────────────────────────────── */

.signal-line {
  position: relative;
}

.signal-line::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 1px;
  height: 80px;
  background: linear-gradient(180deg, var(--accent-dim), transparent);
  transform: translateX(-50%);
}


/* ────────────────────────────────────
   H. Typing Cursor
   ──────────────────────────────────── */

.typing-cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent-bright);
  margin-left: 2px;
  animation: typing-cursor 1s step-end infinite;
  vertical-align: text-bottom;
}


/* ────────────────────────────────────
   I. Preloader
   ──────────────────────────────────── */

.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-lg);
  transition: opacity 0.6s var(--ease-out), visibility 0.6s;
}

.preloader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader__spinner {
  width: 40px;
  height: 40px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: rotate-slow 0.8s linear infinite;
}

.preloader__text {
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}