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Component Skill — components/payment-form/component-skill.md

Native basis

A <fieldset>: methods as radio "tabs" (value="card|paypal|bank"), one panel per method (data-method) shown with :has(); the card panel has number, expiry, security code and name with autocomplete="cc-..." and inputmode="numeric".

Built from

Input, Label, Checkbox, Radio, Button.

Web Platform APIs

:has()autocompleteinputmode<fieldset>Constraint validation

Classes

.mk-payment-form.mk-payment-form-methods.mk-payment-form-panel.mk-payment-form-fields.mk-payment-form-field.mk-payment-form-number.mk-payment-form-note.mk-payment-form-saved.mk-payment-form-brand

Data attributes

data-method on panels; .mk-payment-form-saved for saved cards.

§Default

Card / PayPal / Bank transfer are radio inputs - :has(:checked) shows the matching panel, no script. The card fields use cc-number / cc-exp / cc-csc / cc-name autofill and the numeric keyboard.

§Saved cards

.mk-payment-form-saved: saved cards as radio rows - brand, last digits, expiry - and "use another card".

§CSS view file

/* -- Payment Form (website · Shop) ----------------------------------------
   Collects or selects a payment method - card, PayPal or bank transfer as tabs, the card fields with the right keyboards and autofill, or a saved card. */
@layer components {
  /* every box in the block measures border-box - the same on any page */
  :where(.mk-payment-form, .mk-payment-form *, .mk-payment-form ::before, .mk-payment-form ::after) {
    box-sizing: border-box;
  }
  .mk-payment-form {
    display: grid;
    gap: 1rem;
    margin: 0;
    padding: 0;
    border: 0;
    min-width: 0;
    max-width: 32rem;
    & legend {
      margin-block-end: 1rem;
      padding: 0;
      font-size: 1.0625rem;
      font-weight: 600;
    }
  }
  .mk-payment-form-methods {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
    & label {
      position: relative;
      display: grid;
      justify-items: center;
      gap: 0.25rem;
      padding: 0.75rem 0.5rem;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      font-size: 0.8125rem;
      font-weight: 600;
      cursor: pointer;
    }
    & input {
      position: absolute;
      inset: 0;
      margin: 0;
      opacity: 0;
      cursor: pointer;
    }
    & svg {
      width: 1.25rem;
      height: 1.25rem;
    }
    & label:has(:checked) {
      border-color: var(--primary);
      box-shadow: 0 0 0 1px var(--primary);
      background: color-mix(in oklch, var(--primary) 5%, transparent);
    }
    & label:has(:focus-visible) {
      outline: 2px solid var(--ring);
      outline-offset: 2px;
    }
  }
  .mk-payment-form-panel {
    display: none;
    gap: 1rem;
    padding: 1.25rem;
    border-radius: var(--radius-lg);
    background: var(--muted);
    & p {
      margin: 0;
      color: var(--muted-foreground);
      font-size: 0.875rem;
    }
    & dl {
      display: grid;
      gap: 0.5rem;
      margin: 0;
      font-size: 0.875rem;
    }
    & dl div {
      display: flex;
      justify-content: space-between;
      gap: 1rem;
    }
    & dt {
      color: var(--muted-foreground);
    }
    & dd {
      margin: 0;
      font-family: var(--font-mono);
    }
  }
  .mk-payment-form:has(input[value="card"]:checked) [data-method="card"],
  .mk-payment-form:has(input[value="paypal"]:checked) [data-method="paypal"],
  .mk-payment-form:has(input[value="bank"]:checked) [data-method="bank"] {
    display: grid;
  }
  .mk-payment-form-fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.875rem;
  }
  .mk-payment-form-field {
    display: grid;
    gap: 0.375rem;
    &[data-span="full"] {
      grid-column: 1 / -1;
    }
  }
  .mk-payment-form-number {
    position: relative;
    & .input {
      padding-inline-end: 6.5rem;
      font-variant-numeric: tabular-nums;
      letter-spacing: 0.04em;
    }
    & ul {
      position: absolute;
      top: 50%;
      right: 0.5rem;
      translate: 0 -50%;
      display: flex;
      gap: 0.25rem;
      margin: 0;
      padding: 0;
      list-style: none;
    }
    & li {
      padding: 0.0625rem 0.3125rem;
      border: 1px solid var(--border);
      border-radius: 3px;
      background: var(--background);
      font-size: 0.5625rem;
      font-weight: 800;
      letter-spacing: 0.02em;
    }
  }
  .mk-payment-form-note {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--muted-foreground);
    font-size: 0.75rem;
    & svg {
      width: 0.875rem;
      height: 0.875rem;
    }
  }
  .mk-payment-form-saved {
    display: grid;
    gap: 0.5rem;
    & label {
      position: relative;
      display: grid;
      grid-template-columns: auto auto minmax(0, 1fr) auto;
      align-items: center;
      gap: 0.75rem;
      padding: 0.875rem 1rem;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      cursor: pointer;
      font-size: 0.9375rem;
    }
    & label:has(:checked) {
      border-color: var(--primary);
      box-shadow: 0 0 0 1px var(--primary);
    }
    & small {
      color: var(--muted-foreground);
      font-size: 0.8125rem;
    }
  }
  .mk-payment-form-brand {
    display: grid;
    place-items: center;
    width: 2.5rem;
    height: 1.625rem;
    border-radius: 4px;
    background: var(--foreground);
    color: var(--background);
    font-size: 0.5625rem;
    font-weight: 800;
    letter-spacing: 0.04em;
  }
  /* -- Accessibility ------------------------------------------- */
  @media (forced-colors: active) {
    .mk-payment-form-methods label:has(:checked),
    .mk-payment-form-saved label:has(:checked) {
      border-color: Highlight;
    }
  }
}

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