/* ============================================================
   TWEET — Animations & Keyframes
   ============================================================ */

/* ── Keyframes ── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

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

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

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-32px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(32px); }
  to   { opacity: 1; transform: translateX(0); }
}

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

@keyframes slideInUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

@keyframes slideInDown {
  from { transform: translateY(-100%); }
  to   { transform: translateY(0); }
}

@keyframes slideInLeft {
  from { transform: translateX(-100%); }
  to   { transform: translateX(0); }
}

@keyframes slideInRight {
  from { transform: translateX(100%); }
  to   { transform: translateX(0); }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

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

@keyframes ping {
  75%, 100% {
    transform: scale(2);
    opacity: 0;
  }
}

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

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}

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

@keyframes heroText {
  0%   { opacity: 0; transform: translateY(30px) skewY(1deg); }
  100% { opacity: 1; transform: translateY(0) skewY(0); }
}

@keyframes drawLine {
  from { width: 0; }
  to   { width: 100%; }
}

@keyframes counterUp {
  from { transform: translateY(100%); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

@keyframes ripple {
  0%   { transform: scale(0); opacity: 0.6; }
  100% { transform: scale(4); opacity: 0; }
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-16px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(-16px) scale(0.96); }
}

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

@keyframes modalIn {
  from { opacity: 0; transform: translateY(40px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes progressBar {
  from { width: 0%; }
  to   { width: 100%; }
}

/* ── Scroll-Triggered Animation Classes ── */
/* Elements start invisible; JS adds .animate-in when in viewport */

.anim-fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity var(--duration-slow) var(--ease-luxury),
              transform var(--duration-slow) var(--ease-luxury);
}

.anim-fade-left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity var(--duration-slow) var(--ease-luxury),
              transform var(--duration-slow) var(--ease-luxury);
}

.anim-fade-right {
  opacity: 0;
  transform: translateX(32px);
  transition: opacity var(--duration-slow) var(--ease-luxury),
              transform var(--duration-slow) var(--ease-luxury);
}

.anim-scale {
  opacity: 0;
  transform: scale(0.93);
  transition: opacity var(--duration-slow) var(--ease-luxury),
              transform var(--duration-slow) var(--ease-luxury);
}

.anim-fade-up.animate-in,
.anim-fade-left.animate-in,
.anim-fade-right.animate-in,
.anim-scale.animate-in {
  opacity: 1;
  transform: none;
}

/* Stagger delays */
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }
.delay-400 { transition-delay: 400ms; }
.delay-500 { transition-delay: 500ms; }
.delay-600 { transition-delay: 600ms; }
.delay-700 { transition-delay: 700ms; }
.delay-800 { transition-delay: 800ms; }

/* ── Skeleton Loading ── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-200) 25%,
    var(--color-gray-100) 50%,
    var(--color-gray-200) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* ── Spinner ── */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-gray-300);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
  flex-shrink: 0;
}

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 1.5px;
}

.spinner-lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

.spinner-gold {
  border-color: var(--color-secondary-light);
  border-top-color: var(--color-secondary);
}

/* ── Hover Lift ── */
.hover-lift {
  transition: transform var(--duration-normal) var(--ease-luxury),
              box-shadow var(--duration-normal) var(--ease-luxury);
}

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

/* ── Hover Scale ── */
.hover-scale {
  transition: transform var(--duration-normal) var(--ease-standard);
}
.hover-scale:hover {
  transform: scale(1.03);
}

/* ── Image Zoom on Hover ── */
.img-zoom-container {
  overflow: hidden;
}
.img-zoom-container img {
  transition: transform var(--duration-slower) var(--ease-luxury);
}
.img-zoom-container:hover img {
  transform: scale(1.06);
}

/* ── Underline Slide ── */
.underline-slide {
  position: relative;
  display: inline-block;
}
.underline-slide::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width var(--duration-normal) var(--ease-luxury);
}
.underline-slide:hover::after {
  width: 100%;
}

/* ── Ripple Effect (for buttons) ── */
.ripple-container {
  position: relative;
  overflow: hidden;
}
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  pointer-events: none;
  animation: ripple 0.6s linear;
}

/* ── Page Transition ── */
.page-transition {
  animation: fadeIn var(--duration-normal) var(--ease-standard);
}

/* ── Marquee ── */
.marquee-wrapper {
  overflow: hidden;
  white-space: nowrap;
}
.marquee-inner {
  display: inline-block;
  animation: marquee 30s linear infinite;
}
.marquee-wrapper:hover .marquee-inner {
  animation-play-state: paused;
}

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