/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 120, 212, 0.4);
  }
  70% {
    box-shadow: 0 0 0 6px rgba(0, 120, 212, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 120, 212, 0);
  }
}

/* 应用动画的类 */
.fade-in {
  animation: fadeIn 0.3s ease forwards;
}

.fade-in-left {
  animation: fadeInLeft 0.3s ease forwards;
}

.fade-in-right {
  animation: fadeInRight 0.3s ease forwards;
}

.scale-in {
  animation: scaleIn 0.3s ease forwards;
}

/* 按钮悬停动画 */
.btn {
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.3);
  opacity: 0;
  border-radius: 100%;
  transform: scale(1, 1) translate(-50%, -50%);
  transform-origin: 50% 50%;
}

.btn:focus:not(:active)::after {
  animation: ripple 0.6s ease-out;
}

@keyframes ripple {
  0% {
    transform: scale(0, 0);
    opacity: 0.5;
  }
  100% {
    transform: scale(20, 20);
    opacity: 0;
  }
}

/* 输入框焦点动画 */
input:focus {
  animation: pulse 1.5s;
}

/* 标签切换动画 */
.tab-pane.active {
  animation: fadeIn 0.3s ease forwards;
}

.inner-tab-pane.active {
  animation: fadeInRight 0.3s ease forwards;
}

/* 密码切换动画 */
.toggle-password {
  transition: transform 0.2s ease;
}

.toggle-password:active {
  transform: translateY(-50%) scale(0.9);
}

/* 验证码按钮动画 */
.get-code-btn {
  position: relative;
  transition: background-color 0.3s ease;
}

.get-code-btn:disabled {
  opacity: 0.7;
}

/* 步骤切换动画 */
.recovery-step.active {
  animation: fadeInRight 0.3s ease forwards;
}

.recovery-step.exit {
  animation: fadeInLeft 0.3s ease reverse forwards;
}

/* 卡片进入动画 */
.auth-card {
  animation: scaleIn 0.4s ease-out;
}

/* 表单提交动画 */
.form.submitting .btn[type="submit"] {
  position: relative;
  pointer-events: none;
}

.form.submitting .btn[type="submit"]::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -0.5em;
  margin-left: -0.5em;
  width: 1em;
  height: 1em;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  animation: spin 0.6s linear infinite;
}

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

/* 错误提示动画 */
.error-message {
  color: var(--error-color);
  font-size: 0.75rem;
  margin-top: 0.25rem;
  animation: shake 0.4s ease-in-out;
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  20%,
  60% {
    transform: translateX(-5px);
  }
  40%,
  80% {
    transform: translateX(5px);
  }
}

/* 成功提示动画 */
.success-message {
  color: var(--success-color);
  font-size: 0.75rem;
  margin-top: 0.25rem;
  animation: fadeIn 0.3s ease forwards;
}

/* 标签指示器动画 */
.tab-indicator,
.inner-tab-indicator {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}