/* ================================================================
   THIRSTYBEAR - Animations
   Scroll reveals, hover effects, transitions, keyframes
   ================================================================ */

/* ================================================================
   SCROLL REVEAL CLASSES
   Applied via JS IntersectionObserver, add .is-visible on scroll
   ================================================================ */
.reveal-up,
.reveal-left,
.reveal-right,
.reveal-scale {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-up {
  transform: translateY(30px);
}

.reveal-left {
  transform: translateX(-30px);
}

.reveal-right {
  transform: translateX(30px);
}

.reveal-scale {
  transform: scale(0.95);
}

.reveal-up.is-visible,
.reveal-left.is-visible,
.reveal-right.is-visible,
.reveal-scale.is-visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* ================================================================
   STAGGER DELAYS
   Add .reveal-stagger to parent, children get sequential delays
   ================================================================ */
.reveal-stagger > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger > *:nth-child(3) { transition-delay: 0.15s; }
.reveal-stagger > *:nth-child(4) { transition-delay: 0.2s; }
.reveal-stagger > *:nth-child(5) { transition-delay: 0.25s; }
.reveal-stagger > *:nth-child(6) { transition-delay: 0.3s; }
.reveal-stagger > *:nth-child(7) { transition-delay: 0.35s; }
.reveal-stagger > *:nth-child(8) { transition-delay: 0.4s; }

/* ================================================================
   CARD HOVER EFFECTS
   Lift, shadow, image zoom, title underline
   ================================================================ */

/* Lift + shadow on card hover (applied in components.css via transition) */

/* Image zoom on card hover */
article:hover .post-image img {
  transform: scale(1.02);
}

.tb-post-card:hover .tb-post-card__image img,
.tb-post-card:hover .tb-post-card__image-bg {
  transform: scale(1.06);
}

.tb-related-card:hover .tb-related-card__image img {
  transform: scale(1.06);
}

/* Title underline grow on card hover */
.tb-post-card .entry-title a,
.tb-post-card .tb-post-card__title a {
  background-image: linear-gradient(var(--amber), var(--amber));
  background-size: 0% 2px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.3s ease, color 0.2s;
}

.tb-post-card:hover .entry-title a,
.tb-post-card:hover .tb-post-card__title a {
  background-size: 100% 2px;
}

/* Blog archive card title underline */
.blog .inside-article .entry-title a,
.archive .inside-article .entry-title a {
  background-image: linear-gradient(var(--amber), var(--amber));
  background-size: 0% 2px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.3s ease, color 0.2s;
}

.blog .inside-article:hover .entry-title a,
.archive .inside-article:hover .entry-title a {
  background-size: 100% 2px;
}

/* ================================================================
   NAV HOVER UNDERLINE
   Animated bottom border on navigation links
   ================================================================ */
.main-navigation .main-nav > ul > li > a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: var(--amber);
  transition: width 0.3s ease, left 0.3s ease;
}

.main-navigation .main-nav > ul > li > a:hover::after,
.main-navigation .main-nav > ul > li.current-menu-item > a::after {
  width: 100%;
  left: 0;
}

/* ================================================================
   FLOATING ANIMATION (for 404 number)
   ================================================================ */
@keyframes gentleFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.error404 .tb-404-number {
  animation: gentleFloat 4s ease-in-out infinite;
}

/* ================================================================
   PAGE LOAD FADE
   ================================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.thirstybear-theme .site-content {
  animation: fadeInUp 0.5s ease both;
  animation-delay: 0.1s;
}

/* ================================================================
   DROP CAP ANIMATION
   Subtle fade-in for the drop cap letter
   ================================================================ */
@keyframes dropCapReveal {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.single .entry-content > p:first-of-type::first-letter {
  animation: dropCapReveal 0.6s ease 0.3s both;
}

/* ================================================================
   GRAIN DRIFT
   Subtle movement for grain texture overlays
   ================================================================ */
@keyframes grainDrift {
  0% { transform: translate(0, 0); }
  10% { transform: translate(-2%, -2%); }
  50% { transform: translate(-1%, 2%); }
  100% { transform: translate(0, 0); }
}

.tb-grain-overlay {
  animation: grainDrift 8s steps(10) infinite;
}

/* ================================================================
   404 STAGGERED ANIMATION DELAYS
   ================================================================ */
.error404 .entry-content > *:nth-child(1) { transition-delay: 0s; }
.error404 .entry-content > *:nth-child(2) { transition-delay: 0.1s; }
.error404 .entry-content > *:nth-child(3) { transition-delay: 0.2s; }
.error404 .entry-content > *:nth-child(4) { transition-delay: 0.25s; }
.error404 .entry-content > *:nth-child(5) { transition-delay: 0.3s; }
.error404 .entry-content > *:nth-child(6) { transition-delay: 0.35s; }
.error404 .entry-content > *:nth-child(7) { transition-delay: 0.4s; }

/* ================================================================
   STICKY HEADER TRANSITION
   ================================================================ */
.site-header {
  transition: padding 0.3s, box-shadow 0.3s;
}

.site-header.is-scrolled {
  padding-top: 8px !important;
  padding-bottom: 8px !important;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

/* ================================================================
   BACK TO TOP BUTTON
   ================================================================ */
.generate-back-to-top {
  transition: opacity 0.3s, transform 0.3s !important;
}

.generate-back-to-top:hover {
  transform: translateY(-3px) !important;
}

/* ================================================================
   WIDGET TITLE UNDERLINE GROW
   ================================================================ */
.inside-right-sidebar .widget-title::after {
  transition: width 0.4s ease;
}

.inside-right-sidebar .widget:hover .widget-title::after {
  width: 60px;
}

/* ================================================================
   BRUSH BUTTON PRESS FEEDBACK
   ================================================================ */
.brush-btn {
  transition: transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1), filter 0.2s, box-shadow 0.2s;
}

/* ================================================================
   POST NAVIGATION CARD HOVER
   ================================================================ */
.post-navigation .nav-previous,
.post-navigation .nav-next {
  transition: all 0.3s ease;
}

.tb-post-nav__item {
  transition: all 0.3s ease;
}

/* ================================================================
   FEATURED IMAGE SLOW ZOOM
   Subtle Ken Burns effect on single post hero
   ================================================================ */
.single .post-image img {
  transition: transform 6s ease;
}

/* ================================================================
   RELATED CARD HOVER TRANSITIONS
   ================================================================ */
.tb-related-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tb-related-card__image img {
  transition: transform 0.5s ease;
}