This is a solution to the Interactive card details form challenge on Frontend Mentor.

• Overview
  • The challenge
  • Screenshot
  • Links
• My process
  • What I learned
  • Built with
  • Useful resources
  • Author

Users should be able to:

• Fill in the form and see the card details update in real-time
• Receive error messages when the form is submitted if:
  • Any input field is empty
  • The card number, expiry date, or CVC fields are in the wrong format
• View the optimal layout depending on their device's screen size
• See hover, active, and focus states for interactive elements on the page

• Live Site URL: Add live site URL here

Working on this challenge i struggled with gradient border for input field, after some research i found suitable for me solution. Wrapping input element in div, which has ::before decoration with gradient fill in it.

<div class="input-border">
  <input placeholder="e. g. Jane Appleseed" required>
</div>

.input-border{
  @apply container relative w-full rounded-md;
}

.input-border::before{
  content: "";
  @apply absolute top-0 bottom-0 left-0 right-0 bg-white border-0 rounded-[0.43em];
  top: 0; right: 0; bottom: 0; left: 0;
  z-index: -1;
  background: linear-gradient(to right, #6448FEFF, #600594FF);
}

input{
  @apply w-full h-full bg-white border-solid border-1 border-light-violet rounded-md
  p-3 font-sans font-medium outline-none;
}

input:focus-visible{
  @apply border-none rounded-md;
  background-origin: border-box;
  background-clip: content-box, border-box;
  box-shadow: 2px 1000px 1px #fff inset;
  border: solid 1px transparent;
}

• Semantic HTML5 markup
• CSS custom properties
• Flexbox
• CSS Grid
• Mobile-first workflow
• VUE - VUE framework
• Styled Components - For styles

• Google Fonts
• Button with gradient border

• Frontend Mentor - @IlyaChichkov