/* Form field groups — semantic clusters within modals */
.form-fieldset {
  > :not([hidden]) ~ :not([hidden]) {
    margin-top: 0.75rem;
  }
}

.form-fieldset-label {
  font-size: 0.75rem;
  line-height: 1rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
  color: var(--text-muted);
}

.form-divider {
  border-top: 1px solid var(--surface-border);
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.form-optional-hint {
  font-size: 0.75rem;
  line-height: 1rem;
  color: var(--text-faint);
}

/* Form validation errors */
.form-error {
  font-size: 0.75rem;
  line-height: 1rem;
  margin-top: 0.25rem;
  display: block;
  color: #b91c1c;
}

:root[data-theme="dark"] .form-error,
.dark .form-error {
  color: #fca5a5;
}

.form-input-error {
  border-color: #b91c1c;
}

.form-input-error:focus {
  border-color: #b91c1c;
  box-shadow: 0 0 0 2px rgba(185, 28, 28, 0.15);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-left: 1rem;
  padding-right: 1rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  border-radius: 0.5rem;
  font-weight: 500;
  transition-property:
    color, background-color, border-color, text-decoration-color, fill, stroke;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
  cursor: pointer;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-left: 1rem;
  padding-right: 1rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  border-radius: 0.5rem;
  font-weight: 500;
  transition-property:
    color, background-color, border-color, text-decoration-color, fill, stroke;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
  cursor: pointer;
  color: var(--btn-primary-text);
  background: var(--btn-primary-bg);
}

.btn-primary:hover {
  background: var(--btn-primary-bg-hover);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-left: 1rem;
  padding-right: 1rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  border-radius: 0.5rem;
  font-weight: 500;
  transition-property:
    color, background-color, border-color, text-decoration-color, fill, stroke;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
  cursor: pointer;
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border: 1px solid var(--btn-secondary-border);
}

.btn-secondary:hover {
  background: var(--btn-secondary-bg-hover);
}

.btn-tertiary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-left: 1rem;
  padding-right: 1rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  border-radius: 0.5rem;
  font-weight: 500;
  transition-property:
    color, background-color, border-color, text-decoration-color, fill, stroke;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
  cursor: pointer;
  color: var(--btn-primary-text);
  background: var(--btn-primary-bg);
}

.btn-tertiary:hover {
  background: var(--btn-primary-bg-hover);
}

.btn-link {
  color: var(--text-muted);
  font-weight: 500;
  text-decoration-line: underline;
  transition-property:
    color, background-color, border-color, text-decoration-color, fill, stroke;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
  cursor: pointer;
}

.btn-link:hover {
  color: var(--text-primary);
}

.btn-danger {
  color: var(--brand-red-600);
  font-weight: 500;
  text-decoration-line: underline;
  transition-property:
    color, background-color, border-color, text-decoration-color, fill, stroke;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
  cursor: pointer;
}

/* Forms */
.form-label {
  display: block;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-input {
  border-radius: 0.5rem;
  font-size: 1rem;
  line-height: 1.5rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  padding-left: 0.75rem;
  padding-right: 0.75rem;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-primary);
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease,
    background-color 150ms ease;
}

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

/* Hide number input spinners */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
}

.form-input::placeholder {
  color: var(--text-placeholder);
}

/* Select/option dark mode fix — native <option> elements need explicit colors */
select.form-input option,
select.form-input optgroup {
  background: var(--input-bg);
  color: var(--text-primary);
}

.form-input-lg {
  border-radius: 0.5rem;
  font-size: 1rem;
  line-height: 1.5rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  padding-left: 1rem;
  padding-right: 1rem;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-primary);
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease,
    background-color 150ms ease;
}

.form-input-lg:focus {
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 2px var(--input-ring-focus);
  background: var(--input-bg-focus);
  outline: none;
}

.form-input-lg::placeholder {
  color: var(--text-placeholder);
}

/* File input — the native ::file-selector-button looks like a 1995 OS
   widget by default. We hide it visually behind ours: the input itself is
   styled like .form-input, and the selector button inside is restyled as
   a compact secondary button so the whole control reads as one tidy field
   with a "Choose file" affordance on the left. */
.form-file {
  display: block;
  width: 100%;
  border-radius: 0.5rem;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-muted);
  font: inherit;
  font-size: 0.875rem;
  padding: 0.375rem;
  cursor: pointer;
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease,
    background-color 150ms ease;
}

.form-file:hover {
  border-color: var(--input-border-focus);
}

.form-file:focus-within {
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 2px var(--input-ring-focus);
  background: var(--input-bg-focus);
  outline: none;
}

.form-file::file-selector-button {
  margin-right: 0.75rem;
  padding: 0.4rem 0.875rem;
  border-radius: 0.375rem;
  border: 1px solid var(--input-border);
  background: var(--input-bg-focus, var(--input-bg));
  color: var(--text-primary);
  font: inherit;
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition:
    background-color 150ms ease,
    border-color 150ms ease,
    color 150ms ease;
}

.form-file::file-selector-button:hover {
  border-color: var(--input-border-focus);
  background: var(--input-bg);
  color: var(--text-primary);
}