/**
 * AKSRT Animations — animate.css 等价（独立重写）
 * ------------------------------------------------------------
 * 关键帧 + 工具类 + IntersectionObserver 触发配合
 * 触发 JS 已在 enhancements2.js（[data-aksrt-animate] 属性）
 * 本文件仅定义 @keyframes 和 .aksrt-anim-* 工具类
 */

/* ============================================================
 * Keyframes
 * ============================================================ */

/* Fade 系列 */
@keyframes aksrtFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes aksrtFadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: none; }
}

@keyframes aksrtFadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: none; }
}

@keyframes aksrtFadeInLeft {
  from { opacity: 0; transform: translateX(-20px); }
  to   { opacity: 1; transform: none; }
}

@keyframes aksrtFadeInRight {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: none; }
}

/* Zoom 系列 */
@keyframes aksrtZoomIn {
  from { opacity: 0; transform: scale(.85); }
  to   { opacity: 1; transform: none; }
}

@keyframes aksrtZoomInUp {
  from { opacity: 0; transform: scale(.85) translateY(20px); }
  to   { opacity: 1; transform: none; }
}

/* Bounce 系列 */
@keyframes aksrtBounceIn {
  0%   { opacity: 0; transform: scale(.3); }
  50%  { opacity: 1; transform: scale(1.08); }
  70%  { transform: scale(.95); }
  100% { opacity: 1; transform: none; }
}

@keyframes aksrtBounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40%  { transform: translateY(-12px); }
  60%  { transform: translateY(-6px); }
}

/* Pulse */
@keyframes aksrtPulse {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.06); }
  100% { transform: scale(1); }
}

/* Flash */
@keyframes aksrtFlash {
  0%, 50%, 100% { opacity: 1; }
  25%, 75%      { opacity: 0; }
}

/* RubberBand */
@keyframes aksrtRubberBand {
  0%   { transform: scale(1); }
  30%  { transform: scaleX(1.25) scaleY(0.75); }
  40%  { transform: scaleX(0.75) scaleY(1.25); }
  50%  { transform: scaleX(1.15) scaleY(0.85); }
  65%  { transform: scaleX(0.95) scaleY(1.05); }
  75%  { transform: scaleX(1.05) scaleY(0.95); }
  100% { transform: scale(1); }
}

/* Shake */
@keyframes aksrtShake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
  20%, 40%, 60%, 80% { transform: translateX(4px); }
}

/* Swing */
@keyframes aksrtSwing {
  20%  { transform: rotate(15deg); }
  40%  { transform: rotate(-10deg); }
  60%  { transform: rotate(5deg); }
  80%  { transform: rotate(-5deg); }
  100% { transform: none; }
}

/* Tada */
@keyframes aksrtTada {
  0%   { transform: scale(1); }
  10%, 20% { transform: scale(0.9) rotate(-3deg); }
  30%, 50%, 70%, 90% { transform: scale(1.1) rotate(3deg); }
  40%, 60%, 80% { transform: scale(1.1) rotate(-3deg); }
  100% { transform: scale(1) rotate(0); }
}

/* Wobble */
@keyframes aksrtWobble {
  0%   { transform: none; }
  15%  { transform: translateX(-25%) rotate(-5deg); }
  30%  { transform: translateX(20%) rotate(3deg); }
  45%  { transform: translateX(-15%) rotate(-3deg); }
  60%  { transform: translateX(10%) rotate(2deg); }
  75%  { transform: translateX(-5%) rotate(-1deg); }
  100% { transform: none; }
}

/* Slide 系列 */
@keyframes aksrtSlideInUp {
  from { opacity: 0; transform: translateY(100%); }
  to   { opacity: 1; transform: none; }
}

@keyframes aksrtSlideInDown {
  from { opacity: 0; transform: translateY(-100%); }
  to   { opacity: 1; transform: none; }
}

@keyframes aksrtSlideInLeft {
  from { opacity: 0; transform: translateX(-100%); }
  to   { opacity: 1; transform: none; }
}

@keyframes aksrtSlideInRight {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: none; }
}

/* Flip */
@keyframes aksrtFlip {
  0%   { transform: perspective(400px) rotateY(90deg); opacity: 0; }
  40%  { transform: perspective(400px) rotateY(-10deg); }
  70%  { transform: perspective(400px) rotateY(10deg); }
  100% { transform: perspective(400px) rotateY(0deg); opacity: 1; }
}

@keyframes aksrtFlipInX {
  0%   { transform: perspective(400px) rotateX(90deg); opacity: 0; }
  40%  { transform: perspective(400px) rotateX(-10deg); }
  70%  { transform: perspective(400px) rotateX(10deg); }
  100% { transform: perspective(400px) rotateX(0deg); opacity: 1; }
}

/* ============================================================
 * Animation utility classes
 * ============================================================ */
.aksrt-anim-fade-in     { animation: aksrtFadeIn var(--dur-base, .4s) var(--ease-out, ease) both; }
.aksrt-anim-fade-up     { animation: aksrtFadeInUp var(--dur-base, .4s) var(--ease-out, ease) both; }
.aksrt-anim-fade-down   { animation: aksrtFadeInDown var(--dur-base, .4s) var(--ease-out, ease) both; }
.aksrt-anim-fade-left   { animation: aksrtFadeInLeft var(--dur-base, .4s) var(--ease-out, ease) both; }
.aksrt-anim-fade-right  { animation: aksrtFadeInRight var(--dur-base, .4s) var(--ease-out, ease) both; }

.aksrt-anim-zoom-in     { animation: aksrtZoomIn var(--dur-base, .4s) var(--ease-out, ease) both; }
.aksrt-anim-zoom-in-up  { animation: aksrtZoomInUp var(--dur-base, .4s) var(--ease-out, ease) both; }

.aksrt-anim-bounce-in   { animation: aksrtBounceIn .6s var(--ease-out, ease) both; }
.aksrt-anim-bounce      { animation: aksrtBounce 1s ease both; }

.aksrt-anim-pulse       { animation: aksrtPulse 1s ease infinite; }
.aksrt-anim-flash       { animation: aksrtFlash 1s ease both; }
.aksrt-anim-rubber-band { animation: aksrtRubberBand .8s ease both; }
.aksrt-anim-shake       { animation: aksrtShake .5s ease both; }
.aksrt-anim-swing       { animation: aksrtSwing .6s var(--ease-out, ease) both; }
.aksrt-anim-tada        { animation: aksrtTada 1s ease both; }
.aksrt-anim-wobble      { animation: aksrtWobble .8s ease both; }

.aksrt-anim-slide-up    { animation: aksrtSlideInUp .5s var(--ease-out, ease) both; }
.aksrt-anim-slide-down  { animation: aksrtSlideInDown .5s var(--ease-out, ease) both; }
.aksrt-anim-slide-left  { animation: aksrtSlideInLeft .5s var(--ease-out, ease) both; }
.aksrt-anim-slide-right { animation: aksrtSlideInRight .5s var(--ease-out, ease) both; }

.aksrt-anim-flip        { animation: aksrtFlip .6s var(--ease-out, ease) both; }
.aksrt-anim-flip-x      { animation: aksrtFlipInX .6s var(--ease-out, ease) both; }

/* ============================================================
 * Duration modifiers
 * ============================================================ */
.aksrt-anim-fast { --dur-base: .2s; }
.aksrt-anim-slow { --dur-base: .6s; }

/* ============================================================
 * Delay modifiers (配合 data-aksrt-delay 使用时为 inline，
 * 也可用 class 方式独立设置)
 * ============================================================ */
.aksrt-anim-delay-1 { animation-delay: .1s; }
.aksrt-anim-delay-2 { animation-delay: .2s; }
.aksrt-anim-delay-3 { animation-delay: .3s; }
.aksrt-anim-delay-4 { animation-delay: .4s; }
.aksrt-anim-delay-5 { animation-delay: .5s; }
.aksrt-anim-delay-6 { animation-delay: .6s; }
.aksrt-anim-delay-7 { animation-delay: .7s; }
.aksrt-anim-delay-8 { animation-delay: .8s; }

/* ============================================================
 * Infinite modifier
 * ============================================================ */
.aksrt-anim-infinite { animation-iteration-count: infinite; }

/* ============================================================
 * Reduced-motion — 尊重用户偏好
 * ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .aksrt-anim-fade-in,
  .aksrt-anim-fade-up,
  .aksrt-anim-fade-down,
  .aksrt-anim-fade-left,
  .aksrt-anim-fade-right,
  .aksrt-anim-zoom-in,
  .aksrt-anim-zoom-in-up,
  .aksrt-anim-bounce-in,
  .aksrt-anim-bounce,
  .aksrt-anim-pulse,
  .aksrt-anim-flash,
  .aksrt-anim-rubber-band,
  .aksrt-anim-shake,
  .aksrt-anim-swing,
  .aksrt-anim-tada,
  .aksrt-anim-wobble,
  .aksrt-anim-slide-up,
  .aksrt-anim-slide-down,
  .aksrt-anim-slide-left,
  .aksrt-anim-slide-right,
  .aksrt-anim-flip,
  .aksrt-anim-flip-x {
    animation: none !important;
  }
}