Modal Transition Issues Vue

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I’ve been trying to make my modal slowly come into view after being trigger but it just jumps into view. I suspect it has to do with my stylings but I can’t seem to find where I went wrong. Do I need to have the transition property in the CSS stylings or no? I’m suspecting that might be a reason but when I changed it, I still did not get the expected result.

Any help would be appreciated. Thanks!
[Removed script section since triggering occurs as expected]

<template>
  <div class="header">
    <p :class="{ selected: selectedTitle === 'Chem Viz' }" @click="toggleTo('Chem Viz')">Chem Viz</p>
    <p :class="{ selected: selectedTitle === 'Stories' }" @click="toggleTo('Stories')">Stories</p>
    <p :class="{ selected: selectedTitle === 'About' }" @click="toggleTo('About')">About</p>
    <p><img src="../assets/logo.png" width="100" height="100"></p>
  </div>
  <div class="row">
    <TransitionGroup name="slide" mode="out-in">
      <div class="box" v-for="item in showBlocks" :key="item" @click="toggleExpand(item)">
        <div v-if="expandedItem === item">
          <button @click.stop="closeExpanded">Close</button>
          <component :is="expandedComponent"></component>
        </div>
        <div v-else>
          {{ item }}
        </div>
      </div>
    </TransitionGroup>
  </div>
  <transition name="modal-overlay">
    <div v-if="expandedItem" class="modal-overlay" @click="closeExpanded">
      <transition name="modal-content">
        <div class="modal-content" @click.stop v-if="expandedComponent">
          <component :is="expandedComponent"></component>
          <button class="close-button" @click="closeExpanded">Close</button>
        </div>
      </transition>
    </div>
  </transition>
</template>


<style scoped>
  .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
    font-size: 30px;
    font-weight: 300;
    padding: 20px;
  }
  .header p {
    cursor: pointer;
    transition: font-size 0.3s ease-in-out, font-weight 0.3s ease-in-out;
    min-height: 72px;
    margin: 0;
    align-items: center;
  }
  
  .header p.selected {
    font-size: 72px;
    font-weight: 500;
  }
  
  .row {
    text-align: center;    
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .box {
    width: calc(50% - 60px);
    height: 600px;
    border: 1px solid blue;
    padding: 10px;
    margin: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-sizing: border-box;
    transition: transform 0.7s ease, opacity 0.7s ease;
    cursor: pointer;
  }

  .slide-enter-active, .slide-leave-active {
    transition: transform 0.7s ease, opacity 0.7s ease;
    position: relative;
  }
  
  .slide-enter {
    opacity: 0;
    transform: translateX(-100%);
    position: absolute;
  }

  .slide-enter-to {
    opacity: 0;
    transform: translateX(-100%);
  }
  
  .slide-leave-to {
    opacity: 0;
    transform: translateX(100%);
  }

  .modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  opacity: 1;
  transition: transform 0.7s ease, opacity 0.7s ease;
  }

.modal-content {
  background: white;
  padding: 20px;
  border-radius: 8px;
  width: 100%;
  max-height: 100%;
  overflow: auto;
  opacity: 1;
  transition: transform 0.7s ease, opacity 0.7s ease;
}

.close-button {
  position: absolute; 
  top: 10px;
  right: 10px;
  cursor: pointer;
}

.modal-overlay-enter-active,
.modal-overlay-leave-active {
  transition: opacity 0.7s ease;
}

.modal-overlay-enter,
.modal-overlay-leave-to {
  opacity: 0;
}

.modal-content-enter,
.modal-content-leave-to {
  transform: scale(0.7); 
  opacity: 0; 
}

.modal-content-enter-active,
.modal-content-leave-active {
  transition: transform 0.7s ease, opacity 0.7s ease; /* Smooth transform and opacity transition */
}

</style>