@layer components {
  .input {
    /* Customizable properties with fallbacks */
    --input-background: var(--color-canvas);
    --input-border-color: var(--color-border);
    --input-color: var(--color-ink);
    --input-focus-color: var(--color-link);
    --input-padding: 0.5em 0.75em;

    width: 100%;
    max-width: 100%; /* Prevent overflow on mobile */
    padding: var(--input-padding);
    font-size: max(16px, 1em); /* Prevents iOS zoom on focus */
    border: 1px solid var(--input-border-color);
    border-radius: var(--border-radius);
    background: var(--input-background);
    color: var(--input-color);
    transition: border-color 150ms ease;

    &:focus {
      outline: none;
      border-color: var(--input-focus-color);
      box-shadow: 0 0 0 2px var(--color-focus-ring);
    }

    &::placeholder {
      color: var(--color-ink-lighter);
    }

    &:disabled {
      background: var(--color-ink-lightest);
      cursor: not-allowed;
    }
  }

  .input--select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23666' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75em center;
    padding-right: 2.5em;
  }

  .input--small {
    --input-padding: var(--block-space-half) var(--inline-space);
    font-size: var(--text-footnote);
  }

  .form-group {
    margin-bottom: var(--block-space);

    /* Style input when form-group has error */
    &:has(.form-error) .input {
      --input-border-color: var(--color-negative);
      --input-focus-color: var(--color-negative);
    }
  }

  .form-label {
    display: block;
    margin-bottom: var(--block-space-half);
    font-weight: 500;
    font-size: var(--text-footnote);
  }

  .form-hint {
    margin-top: var(--block-space-half);
    font-size: var(--text-footnote);
    color: var(--color-ink-light);
  }

  .form-error {
    margin-top: var(--block-space-half);
    font-size: var(--text-footnote);
    color: var(--color-negative);
  }

  /* ==========================================================================
     Toggle group (radio-button tabs for calculators)
     ========================================================================== */

  .toggle-group {
    display: flex;
    gap: var(--block-space-half);
    margin-bottom: var(--block-space-1-25);
  }

  .toggle-group input[type="radio"] {
    display: none;
  }

  .toggle-group__option {
    flex: 1;
    padding: var(--block-space-half);
    text-align: center;
    background-color: var(--color-ink-lightest);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 150ms ease;
    font-weight: 500;
    font-size: var(--text-footnote);
    color: var(--color-ink-light);
  }

  .toggle-group input[type="radio"]:checked + .toggle-group__option {
    background-color: var(--color-link);
    border-color: var(--color-link);
    color: var(--color-ink-inverted);
  }

  .toggle-group__option:hover {
    background-color: var(--color-border);
  }

  .toggle-group input[type="radio"]:checked + .toggle-group__option:hover {
    background-color: var(--color-link-hover);
  }

  /* ==========================================================================
     Checkbox label (label + checkbox pair)
     ========================================================================== */

  .checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--inline-space-half);
    font-size: var(--text-subhead);
    cursor: pointer;
    padding: var(--block-space-quarter) 0;
  }

  .checkbox-label .input--checkbox {
    margin: 0;
  }

  /* ==========================================================================
     Textarea variant
     ========================================================================== */

  .input--textarea {
    resize: vertical;
    min-height: calc(var(--block-space) * 8);
    font-family: var(--font-mono);
    font-size: var(--text-footnote);
    line-height: 1.5;
  }

  /* Magic link code input (centered, large) */
  .input--magic-code {
    text-align: center;
    font-size: var(--text-large-title);
    font-family: var(--font-mono);
    letter-spacing: 0.25em;
    padding: var(--block-space);
  }
}