/* ============================================================
   AC Quiz — ac-animations.css
   Keyframes, scroll reveals, hover effects, transitions
   ============================================================ */

/* ---- Base animation states ---- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-36px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal-left.in-view {
  opacity: 1;
  transform: translateX(0);
}
.reveal-right {
  opacity: 0;
  transform: translateX(36px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal-right.in-view {
  opacity: 1;
  transform: translateX(0);
}
.reveal-scale {
  opacity: 0;
  transform: scale(.92);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal-scale.in-view {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays */
.delay-1 { transition-delay: .1s !important; }
.delay-2 { transition-delay: .2s !important; }
.delay-3 { transition-delay: .3s !important; }
.delay-4 { transition-delay: .4s !important; }
.delay-5 { transition-delay: .5s !important; }
.delay-6 { transition-delay: .6s !important; }

/* ---- Keyframes ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(.85); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.05); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-14px); }
}
@keyframes floatSlow {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33%       { transform: translateY(-10px) rotate(2deg); }
  66%       { transform: translateY(6px) rotate(-1deg); }
}
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes rotateSlowCW {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes rotateSlowCCW {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}
@keyframes bounceIn {
  0%   { opacity: 0; transform: scale(.3); }
  50%  { opacity: 1; transform: scale(1.08); }
  70%  { transform: scale(.95); }
  100% { transform: scale(1); }
}
@keyframes typewriter {
  from { width: 0; }
  to   { width: 100%; }
}
@keyframes blink {
  0%, 100% { border-color: var(--accent); }
  50%       { border-color: transparent; }
}
@keyframes countUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Hero animations ---- */
.hero-anim-1 { animation: fadeInUp .75s ease .1s both; }
.hero-anim-2 { animation: fadeInUp .75s ease .25s both; }
.hero-anim-3 { animation: fadeInUp .75s ease .4s both; }
.hero-anim-4 { animation: fadeInUp .75s ease .6s both; }

/* ---- Floating shapes ---- */
.shape {
  position: absolute;
  pointer-events: none;
  will-change: transform;
}
.shape-circle {
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.shape-ring {
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,.1);
  background: transparent;
}
.shape-blob {
  background: rgba(244,120,42,.12);
  border-radius: 60% 40% 50% 70% / 50% 60% 40% 55%;
}
.float-1 { animation: floatSlow 7s ease-in-out infinite; }
.float-2 { animation: floatSlow 9s ease-in-out infinite .5s; }
.float-3 { animation: floatSlow 11s ease-in-out infinite 1s; }
.rotate-cw  { animation: rotateSlowCW 20s linear infinite; }
.rotate-ccw { animation: rotateSlowCCW 15s linear infinite; }

/* ---- Page-load animations ---- */
.page-enter { animation: fadeIn .4s ease; }

/* ---- Navbar nav link underline effect ---- */
.ac-navbar .nav-link {
  position: relative;
}
.ac-navbar .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: .8rem; right: .8rem;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform .25s ease;
}
.ac-navbar .nav-link:hover::after,
.ac-navbar .nav-link.active::after { transform: scaleX(1); }

/* ---- Quiz card hover shine ---- */
.quiz-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,.07) 100%);
  opacity: 0;
  transition: opacity .3s ease;
  border-radius: inherit;
  pointer-events: none;
}
.quiz-card { position: relative; }
.quiz-card:hover::after { opacity: 1; }

/* ---- Skeleton loading ---- */
.skeleton {
  background: linear-gradient(90deg, var(--bg-section) 25%, var(--border-light) 50%, var(--bg-section) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* ---- Answer feedback pulse ---- */
.quiz-option.correct { animation: bounceIn .4s ease; }

/* ---- Stats counter animation ---- */
.counter-value { animation: countUp .6s ease; }

/* ---- Carousel transitions ---- */
.carousel-slide-enter { animation: slideInRight .4s ease; }

/* ---- Floating quiz card ---- */
.hero-quiz-float {
  animation: float 5s ease-in-out infinite;
}
.hero-quiz-float-delayed {
  animation: float 5s ease-in-out infinite 1.5s;
}

/* ---- Tooltip ---- */
[data-tooltip] { position: relative; cursor: pointer; }
[data-tooltip]::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%; left: 50%;
  transform: translateX(-50%) translateY(-6px);
  background: var(--text-dark);
  color: #fff;
  font-family: var(--font-sub);
  font-size: .78rem;
  padding: .35rem .75rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}
[data-tooltip]:hover::before {
  opacity: 1;
  transform: translateX(-50%) translateY(-10px);
}

/* ---- Focus visible ring ---- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---- Scroll progress bar ---- */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: var(--accent);
  z-index: 9998;
  transition: width .1s linear;
}