/* ===================================================================
   Animations - 动画效果
   =================================================================== */

/* === 淡入动画 === */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn var(--transition-slow);
}

/* === 淡入上移动画 === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp var(--transition-slow);
}

/* === 淡入下移动画 === */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-down {
  animation: fadeInDown var(--transition-slow);
}

/* === 从右侧滑入动画 === */
@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.slide-in-right {
  animation: slideInRight var(--transition-slow);
}

/* === 从左侧滑入动画 === */
@keyframes slideInLeft {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.slide-in-left {
  animation: slideInLeft var(--transition-slow);
}

/* === 旋转加载动画 === */
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.spin {
  animation: spin 1s linear infinite;
}

/* === 脉冲动画 === */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* === 弹跳动画 === */
@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.bounce {
  animation: bounce 1s ease-in-out infinite;
}

/* === 进度条流动动画 === */
@keyframes progressFlow {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}

.progress-animated > div {
  background: linear-gradient(
    90deg,
    var(--color-primary) 0%,
    var(--color-primary-light) 50%,
    var(--color-primary) 100%
  );
  background-size: 200% 100%;
  animation: progressFlow 2s linear infinite;
}

/* === 圆形进度条动画 === */
@keyframes circularProgress {
  0% {
    stroke-dashoffset: 283;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

.circular-progress-animated {
  animation: circularProgress 2s ease-in-out;
}

/* === 模态框动画 === */
@keyframes modalSlideIn {
  from {
    transform: scale(0.9) translateY(-20px);
    opacity: 0;
  }
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.modal-slide-in {
  animation: modalSlideIn var(--transition-slow);
}

/* === 抖动动画 === */
@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  10%, 30%, 50%, 70%, 90% {
    transform: translateX(-5px);
  }
  20%, 40%, 60%, 80% {
    transform: translateX(5px);
  }
}

.shake {
  animation: shake 0.5s ease-in-out;
}

/* === 缩放动画 === */
@keyframes zoomIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.zoom-in {
  animation: zoomIn var(--transition-slow);
}

@keyframes zoomOut {
  from {
    transform: scale(1);
    opacity: 1;
  }
  to {
    transform: scale(0.8);
    opacity: 0;
  }
}

.zoom-out {
  animation: zoomOut var(--transition-slow);
}

/* === 骨架屏加载动画 === */
@keyframes skeletonLoading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.skeleton-loading {
  background: linear-gradient(
    90deg,
    var(--color-gray-100) 25%,
    var(--color-gray-200) 50%,
    var(--color-gray-100) 75%
  );
  background-size: 200% 100%;
  animation: skeletonLoading 1.5s ease-in-out infinite;
}

/* === 翻转动画 === */
@keyframes flip {
  0% {
    transform: perspective(400px) rotateY(0);
  }
  100% {
    transform: perspective(400px) rotateY(360deg);
  }
}

.flip {
  animation: flip 1s ease-in-out;
}

/* === 段落翻译淡入动画 === */
.translated-paragraph {
  animation: fadeInUp 0.5s ease;
}

/* === 成功消息动画 === */
.success-message {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--color-success);
  color: white;
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-tooltip);
  animation: slideInRight var(--transition-slow);
}

/* === 错误消息动画 === */
.error-message {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--color-error);
  color: white;
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-tooltip);
  animation: slideInRight var(--transition-slow);
}

/* === 警告消息动画 === */
.warning-message {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--color-warning);
  color: white;
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-tooltip);
  animation: slideInRight var(--transition-slow);
}

/* === 按钮悬停效果 === */
.btn {
  transition: all var(--transition-base);
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

/* === 卡片悬停效果 === */
.card-hover {
  transition: all var(--transition-base);
}

.card-hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* === 涟漪效果 === */
@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  100% {
    transform: scale(4);
    opacity: 0;
  }
}

.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  animation: ripple 0.6s ease-out;
}

/* === 加载点动画 === */
@keyframes dotPulse {
  0%, 80%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  40% {
    opacity: 1;
    transform: scale(1);
  }
}

.loading-dots {
  display: inline-flex;
  gap: var(--spacing-1);
}

.loading-dots span {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: dotPulse 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

/* === 渐变背景动画 === */
@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.gradient-animated {
  background-size: 200% 200%;
  animation: gradientShift 3s ease infinite;
}

/* === 打字机效果 === */
@keyframes typing {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

@keyframes blinkCursor {
  50% {
    border-color: transparent;
  }
}

.typewriter {
  overflow: hidden;
  border-right: 2px solid var(--color-text-primary);
  white-space: nowrap;
  animation: typing 3s steps(40) 1s 1 normal both,
             blinkCursor 0.75s step-end infinite;
}

/* === 工具提示动画 === */
@keyframes tooltipFadeIn {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tooltip-animated {
  animation: tooltipFadeIn 0.2s ease-out;
}

/* === 页面切换动画 === */
@keyframes pageTransition {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.page-transition {
  animation: pageTransition var(--transition-slow);
}

/* === 响应式动画控制 === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}