.linkstack-form {
  align-items: start;
  display: flex;
  gap: 1rem;

  .form-field-summary {
    align-items: center;
    block-size: 100%;
    cursor: pointer;
    display: flex;
    gap: 0.5rem;
    list-style: none;
    padding-inline: 1rem;
    user-select: none;
  }

  .form-field-collapsible {
    border: var(--minimalist-input-border, var(--border-primary-border));
    flex: 1;
    margin-block-end: 0;
    padding: 0;
    position: relative;
  }

  .form-field-collapsible,
  input:not([type="checkbox"]),
  select {
    block-size: 3rem;
  }

  .form-field {
    flex: 1;
    margin-block-end: 0;
  }
}

.form-field-summary::marker,
.form-field-summary::-webkit-details-marker {
  display: none;
}

.form-field-summary::before {
  border-color: transparent transparent transparent var(--text-secondary, #666);
  border-style: solid;
  border-width: 0.3125rem 0 0.3125rem 0.5rem;
  content: "";
  display: inline-block;
  inline-size: 0;
  transition: transform 0.2s ease;
}

.form-field-collapsible[open] {
  &::details-content {
    background-color: var(--bg-primary, #fff);
    border-block-start: 0;
    inline-size: 100%;
  }

  .form-field-summary::before {
    transform: rotate(90deg);
  }
}

.form-field-summary:focus-visible {
  outline: 0.125rem solid var(--focus-color, #06c);
  outline-offset: 0.125rem;
}

.form-field-collapsible .form-field {
  margin-block-end: 0;
  padding: 1rem;
}

/* Validation error styles */

.field-error {
  color: var(--error-color, #ef4444);
  display: block;
  font-size: 0.875rem;
  margin-block-start: 0.5rem;
  min-block-size: 1.5rem;
}

.field-error:empty,
.field-error[hidden] {
  display: none;
}

.public-submit-field {
  margin-block-start: 0.25rem;
}

.public-submit-toggle {
  align-items: start;
  border: 0.0625rem solid var(--minimalist-input-border, var(--border-primary-border));
  border-radius: var(--radius-md, 0.75rem);
  cursor: pointer;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: auto minmax(0, 1fr);
  padding: 0.875rem 1rem;
  transition:
    border-color 0.2s ease,
    background-color 0.2s ease;
}

.public-submit-toggle:hover {
  background-color: var(--ls-surface-subtle);
  border-color: var(--ls-accent-soft, var(--ls-accent));
}

.public-submit-toggle:focus-within {
  border-color: var(--focus-color, #06c);
  outline: 0.125rem solid color-mix(in srgb, var(--focus-color, #06c) 20%, transparent);
  outline-offset: 0.125rem;
}

.public-submit-toggle.is-disabled {
  cursor: not-allowed;
  opacity: 0.75;
}

.public-submit-checkbox {
  accent-color: var(--ls-accent);
  block-size: 1.125rem;
  inline-size: 1.125rem;
  margin: 0.1875rem 0 0;
}

.public-submit-copy {
  display: grid;
  gap: 0.25rem;
}

.public-submit-label {
  color: var(--ls-text-primary);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.3;
}

.public-submit-help {
  color: var(--ls-text-secondary);
  font-size: 0.8125rem;
  line-height: 1.45;
}

input.error,
select.error,
textarea.error {
  border-color: var(--error-color, #ef4444);
}

input.error:focus,
select.error:focus,
textarea.error:focus {
  outline-color: var(--error-color, #ef4444);
}

/* Loading state for submit button */

button[aria-busy="true"] {
  cursor: not-allowed;
  opacity: 0.7;
}

button[aria-busy="true"]:hover {
  opacity: 0.7;
}

@media (width <= 40rem) {
  .public-submit-toggle {
    padding: 0.75rem 0.875rem;
  }

  .public-submit-label {
    font-size: 0.875rem;
  }
}