How to align two elements horizontally?

Javascript
1 
<html>
    <head>
        <link rel="stylesheet" href="index.css">
    </head>
    <body>
        <h1>Christmas Countdown 🎄</h1>
        <div class="container">
            
            <p id="countdown-display" class="countdown-display">-</p>
             <p class="countdown-text">Days 'til Christmas!</p>
     
       <div class="hms"> 
          
          <div class="hours">
          <p>Hours</p>
            <p id="Hoursecountdown-display" class="countdown-display">-</p>
    </div>
           
           <div class="mins">
            <p>Mins</p>
        
        <p id="Mincountdown-display" class="countdown-display">-</p>
        </div>
        
        <div class="secs">
        <p>Secs</p>
        <p id="countdown-display" class="countdown-display">-</p>
        </div>
        
        </div>
        
           
        </div>
        <script src="index.js"></script>
    </body>
</html>


css

:root {
  --wine-red: #C7375F;
  --bright-red: #D42D2F;
  --dark-green: #344D2F;
  --light-green: #77A047;
  --gold: #FAC57D;
  --snow: #F0F4F7;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
    color: var(--dark-green);
    background-color: var(--snow);
}

.container {
    display: flex;
    flex-direction: column;
    background: var(--wine-red);
    color: var(--snow);
    padding: 1em 2em;
    border-radius: 5px;
    box-shadow: rgba(0, 0, 0, 0.1) 0px 4px 6px -1px, rgba(0, 0, 0, 0.06) 0px 2px 4px -1px;
    width:200px
}

.countdown-display {
    font-size: 100px;
    margin: 0;
}

.hms{
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 200px;
    margin: 0 auto;
    
    
    }
    
    .hours{
    display:flex;
      align-items: center;

        
    }
    
    .mins{
        display:flex;
          align-items: center;
           text-align: center;
    }
    .secs{
        display:flex; 
          align-items: center;
    }
2

Could you see if adding this gets what you want? Since you already have a flex container for the .hms class, you might just need to adjust the CSS for the .hours, .mins and .secs classes.

.hours p,
.mins p,
.secs p {
    margin: 0;
    padding-right: 5px; /* I think this can create the spacing between the label and the countdown */
}