/* ============================================================
   ANIMATIONS.CSS — Keyframes, Scroll Reveal, Transitions
   The Architect | Phan Hai Nga Advisory
   ============================================================ */

/* ============================================================
   KEYFRAME ANIMATIONS
   ============================================================ */

/* Marquee scroll */
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* Fade in up — base reveal */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade in down */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade in left */
@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Fade in right */
@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Scale in */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.88);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Hero headline word-by-word */
@keyframes heroWord {
  from {
    opacity: 0;
    transform: translateY(20px) rotateX(20deg);
  }
  to {
    opacity: 1;
    transform: translateY(0) rotateX(0deg);
  }
}

/* Gold shimmer */
@keyframes goldShimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* Pulse glow */
@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(10, 102, 194, 0);
  }
  50% {
    box-shadow: 0 0 20px 8px rgba(10, 102, 194, 0.2);
  }
}

/* Spin slow — logo decoration */
@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Float — subtle levitation */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

/* Counter number count up (JS driven, no keyframe needed) */

/* Draw line */
@keyframes drawLine {
  from { width: 0; }
  to   { width: 100%; }
}

/* Reveal from clip */
@keyframes clipReveal {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0% 0 0); }
}

/* ============================================================
   SCROLL REVEAL — Initial hidden states
   Applied via JS IntersectionObserver: adds .is-visible
   ============================================================ */

/* Base reveal class — all elements that should animate on scroll */
[data-reveal] {
  will-change: transform, opacity;
}

/* Default: fade up */
[data-reveal],
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* Fade left */
[data-reveal="left"],
.reveal--left {
  opacity: 0;
  transform: translateX(-50px);
}

[data-reveal="left"].is-visible,
.reveal--left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Fade right */
[data-reveal="right"],
.reveal--right {
  opacity: 0;
  transform: translateX(50px);
}

[data-reveal="right"].is-visible,
.reveal--right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale in */
[data-reveal="scale"],
.reveal--scale {
  opacity: 0;
  transform: scale(0.9);
}

[data-reveal="scale"].is-visible,
.reveal--scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Fade only (no transform) */
[data-reveal="fade"],
.reveal--fade {
  opacity: 0;
  transform: none;
}

[data-reveal="fade"].is-visible,
.reveal--fade.is-visible {
  opacity: 1;
}

/* Stagger children — parent adds .stagger-children, children get .stagger-item */
.stagger-children .stagger-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.stagger-children.is-visible .stagger-item:nth-child(1) { transition-delay: 0ms;   }
.stagger-children.is-visible .stagger-item:nth-child(2) { transition-delay: 100ms; }
.stagger-children.is-visible .stagger-item:nth-child(3) { transition-delay: 200ms; }
.stagger-children.is-visible .stagger-item:nth-child(4) { transition-delay: 300ms; }
.stagger-children.is-visible .stagger-item:nth-child(5) { transition-delay: 400ms; }
.stagger-children.is-visible .stagger-item:nth-child(6) { transition-delay: 500ms; }

.stagger-children.is-visible .stagger-item {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   HERO ANIMATIONS — Entrance on page load
   ============================================================ */
.hero__eyebrow {
  animation: fadeInDown 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
}

.hero__title {
  animation: fadeInUp 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.4s both;
}

.hero__subtitle {
  animation: fadeInUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.65s both;
}

.hero__actions {
  animation: fadeInUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.85s both;
}

.hero__scroll-hint {
  animation: fadeInUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 1.1s both;
}

.hero__image-wrapper {
  animation: scaleIn 1s cubic-bezier(0.22, 1, 0.36, 1) 0.5s both;
}

/* ============================================================
   SPECIAL EFFECTS
   ============================================================ */

/* Gold shimmer text effect */
.text--shimmer {
  background: linear-gradient(
    90deg,
    var(--color-accent) 0%,
    var(--color-accent-light) 25%,
    var(--color-accent) 50%,
    var(--color-accent-light) 75%,
    var(--color-accent) 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: goldShimmer 4s linear infinite;
}

/* Underline draw animation */
.underline--draw {
  position: relative;
  display: inline-block;
}

.underline--draw::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  border-radius: var(--radius-full);
  transition: width 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.underline--draw.is-visible::after {
  width: 100%;
}

/* Floating decoration element */
.float-anim {
  animation: float 4s ease-in-out infinite;
}

/* Pulse on logo dot */
.pulse-anim {
  animation: pulseGlow 2.5s ease-in-out infinite;
}

/* ============================================================
   NAV TRANSITION
   ============================================================ */
.nav {
  transition: background-color 0.35s ease,
              padding 0.35s ease,
              box-shadow 0.35s ease;
}

/* ============================================================
   PAGE TRANSITIONS
   ============================================================ */
.page-enter {
  animation: fadeInUp 0.5s ease both;
}

/* ============================================================
   REDUCE MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal],
  .reveal,
  .reveal--left,
  .reveal--right,
  .reveal--scale,
  .reveal--fade,
  .stagger-children .stagger-item {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__eyebrow,
  .hero__title,
  .hero__subtitle,
  .hero__actions,
  .hero__scroll-hint,
  .hero__image-wrapper {
    animation: none;
    opacity: 1;
  }
}