/* =============================================================
   CHC Appeal Guide — animations.css
   Scroll-triggered reveal animations and UI transitions
   ============================================================= */


/* ─── 1. REDUCED-MOTION PREFERENCE ─────────────────────────── */
/* All animations must respect the user's OS setting */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .reveal-up,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1 !important;
    transform: none !important;
  }
}


/* ─── 2. SCROLL REVEAL — BASE STATES ────────────────────────── */
/* Elements start invisible/offset; JS adds .is-visible to play in */

.reveal {
  opacity: 0;
  transition:
    opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Fade up (default) */
.reveal-up {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Fade from left */
.reveal-left {
  opacity: 0;
  transform: translateX(-36px);
  transition:
    opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Fade from right */
.reveal-right {
  opacity: 0;
  transform: translateX(36px);
  transition:
    opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Scale up */
.reveal-scale {
  opacity: 0;
  transform: scale(0.94);
  transition:
    opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Visible state — applied by IntersectionObserver */
.reveal.is-visible,
.reveal-up.is-visible,
.reveal-left.is-visible,
.reveal-right.is-visible,
.reveal-scale.is-visible {
  opacity: 1;
  transform: none;
}


/* ─── 3. STAGGER DELAY UTILITIES ────────────────────────────── */
/* Apply to siblings inside a revealed container */

.stagger-1 { transition-delay: 0.08s; }
.stagger-2 { transition-delay: 0.16s; }
.stagger-3 { transition-delay: 0.24s; }
.stagger-4 { transition-delay: 0.32s; }
.stagger-5 { transition-delay: 0.40s; }
.stagger-6 { transition-delay: 0.48s; }


/* ─── 4. NAV SCROLL SHADOW ───────────────────────────────────── */
/* Handled by JS toggling .is-scrolled on .site-header */
/* Transition already defined in main.css */


/* ─── 5. PAGE LOAD ENTRANCE ──────────────────────────────────── */
/* Above-fold hero elements animate in on load — no JS required  */

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Staggered hero entrance — each layer fires after the last */
.hero__eyebrow {
  animation: fadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
}

.hero__heading {
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.4s both;
}

.hero__subheading {
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.6s both;
}

.hero__actions {
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.8s both;
}

.hero__trust {
  animation: fadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 1s both;
}


/* ─── 6. BUTTON PRESS FEEDBACK ───────────────────────────────── */
/* Reinforces the transform in main.css with a brief scale dip */

@keyframes btnPress {
  0%   { transform: translateY(0) scale(1); }
  40%  { transform: translateY(1px) scale(0.98); }
  100% { transform: translateY(0) scale(1); }
}

.btn:active {
  animation: btnPress 0.15s ease forwards;
}


/* ─── 7. FAQ OPEN/CLOSE ──────────────────────────────────────── */
/* Grid-template-rows animation is in main.css (.faq__answer) */
/* Chevron rotation also in main.css */


/* ─── 8. MOBILE MENU SLIDE ───────────────────────────────────── */

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav__links.is-open {
  animation: slideDown 0.2s cubic-bezier(0.22, 1, 0.36, 1) both;
}


/* ─── 9. SCROLL-TO-TOP BUTTON ────────────────────────────────── */

.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background-color: var(--color-forest);
  color: var(--color-cream);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  border: none;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition:
    opacity 0.3s ease,
    transform 0.3s ease,
    background-color var(--transition-fast);
  z-index: 90;
}

.scroll-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.scroll-top:hover {
  background-color: var(--color-forest-mid);
}

.scroll-top svg {
  width: 1.25rem;
  height: 1.25rem;
}


/* ─── 10. SMOOTH UNDERLINE LINKS ─────────────────────────────── */
/* Utility for inline links within body text */

.link-underline {
  position: relative;
  color: var(--color-forest-mid);
  font-weight: 500;
  text-decoration: none;
}

.link-underline::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0%;
  height: 1.5px;
  background-color: var(--color-gold);
  transition: width 0.25s ease;
}

.link-underline:hover::after { width: 100%; }


/* ─── 11. HIGHLIGHT PULSE ────────────────────────────────────── */
/* Used to draw attention to a key phrase or stat */

@keyframes highlightPulse {
  0%   { background-size: 0% 100%; }
  100% { background-size: 100% 100%; }
}

.highlight-text {
  background-image: linear-gradient(
    to right,
    rgba(196,149,58,0.18) 0%,
    rgba(196,149,58,0.18) 100%
  );
  background-repeat: no-repeat;
  background-position: left bottom;
  background-size: 0% 40%;
  padding-bottom: 1px;
}

.highlight-text.is-visible {
  animation: highlightPulse 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.3s forwards;
}