/*
  Поле с ошибкой:
  <div class="form-field form-field--error">
    <div class="form-field__control">
      <input class="form-input" placeholder="..." aria-label="..." />
      <span class="form-field__error" role="alert">Текст ошибки</span>
    </div>
  </div>
*/

/* ——— кнопки (z_styles: Unifix, 400, line-height 1, не на всю ширину по умолчанию) ——— */

.btn {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--btn-icon-gap);
  width: auto;
  max-width: 100%;
  min-height: 0;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  border: var(--btn-border-width) solid transparent;
  border-radius: var(--btn-radius);
  font-family: var(--font-heading);
  font-size: var(--fs-btn);
  line-height: var(--lh-btn);
  font-weight: var(--fw-btn);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    opacity 0.2s ease;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.5;
}

.btn:disabled:hover,
.btn[aria-disabled="true"]:hover,
.btn:disabled:active,
.btn[aria-disabled="true"]:active {
  opacity: 0.5;
}

.btn--primary {
  background-color: var(--c-btn-primary-bg);
  border-color: var(--c-btn-primary-border);
  color: var(--c-btn-primary-fg);
}

.btn--primary:hover:not(:disabled):not([aria-disabled="true"]),
.btn--primary:focus-visible:not(:disabled):not([aria-disabled="true"]) {
  background-color: var(--c-btn-primary-hover-bg);
  border-color: var(--c-btn-primary-hover-border);
  color: var(--c-btn-primary-hover-fg);
}

.btn--primary:active:not(:disabled):not([aria-disabled="true"]) {
  background-color: var(--c-btn-primary-active-bg);
  border-color: var(--c-btn-primary-active-border);
  color: var(--c-btn-primary-active-fg);
}

.btn--primary:focus-visible {
  outline: 2px solid var(--c-focus-ring);
  outline-offset: 2px;
}

.btn--secondary {
  background-color: var(--c-btn-secondary-bg);
  border: var(--btn-border-width) solid var(--c-btn-secondary-border);
  color: var(--c-btn-secondary-fg);
}

.btn--secondary:hover:not(:disabled):not([aria-disabled="true"]),
.btn--secondary:focus-visible:not(:disabled):not([aria-disabled="true"]) {
  background-color: var(--c-btn-secondary-hover-bg);
  border-color: var(--c-btn-secondary-hover-border);
  color: var(--c-btn-secondary-hover-fg, var(--c-btn-secondary-fg));
}

.btn--secondary:active:not(:disabled):not([aria-disabled="true"]) {
  background-color: var(--c-btn-secondary-active-bg);
  border-color: var(--c-btn-secondary-active-border, var(--c-btn-secondary-hover-border));
  color: var(--c-btn-secondary-active-fg, var(--c-btn-secondary-fg));
}

.btn--secondary:focus-visible {
  outline: 2px solid var(--c-focus-ring);
  outline-offset: 2px;
}

.btn__icon {
  flex-shrink: 0;
  display: block;
  width: 1em;
  height: 1em;
  object-fit: contain;
}

svg.btn__icon {
  flex-shrink: 0;
}

/* Блочная кнопка в узкой колонке (модалка) */
.btn--block {
  display: flex;
  width: 100%;
}

/* ——— формы ——— */

.form-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-field {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
}

.form-field__control {
  position: relative;
  margin: 0;
}

.form-input,
.form-textarea {
  box-sizing: border-box;
  width: 100%;
  margin: 0;
  padding: var(--input-pad-y) var(--input-pad-x);
  border: 1px solid var(--c-border);
  border-radius: var(--input-radius);
  background-color: var(--c-bg-page);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: var(--fw-body);
  color: var(--c-text);
  transition: border-color 0.15s ease, color 0.15s ease;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--c-placeholder);
}

.form-input:hover:not(:disabled):not(:focus),
.form-textarea:hover:not(:disabled):not(:focus) {
  border-color: var(--c-border-strong);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--c-primary);
}

.form-input:not(:placeholder-shown):not(:disabled),
.form-textarea:not(:placeholder-shown):not(:disabled) {
  color: var(--c-text);
}

.form-input:disabled,
.form-textarea:disabled {
  color: var(--c-text-filled-disabled);
  cursor: not-allowed;
}

.form-input:disabled::placeholder,
.form-textarea:disabled::placeholder {
  color: var(--c-placeholder-disabled);
}

.form-textarea {
  min-height: var(--textarea-min-h);
  resize: vertical;
}

.form-field--error .form-input,
.form-field--error .form-textarea {
  border-color: var(--c-error);
  padding-right: 36px;
}

.form-field__error-icon {
  position: absolute;
  right: 10px;
  top: 50%;
  z-index: 1;
  display: none;
  align-items: center;
  justify-content: center;
  line-height: 0;
  pointer-events: none;
  transform: translateY(-50%);
}

.form-field__control:has(.form-textarea) .form-field__error-icon {
  top: 22px;
  transform: none;
}

.form-field--error .form-field__error-icon {
  display: flex;
}

.form-field__error {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 2;
  margin-top: var(--form-error-mt);
  max-width: 100%;
  font-size: var(--fs-form-error);
  line-height: var(--lh-form-error);
  font-weight: var(--fw-body);
  font-family: var(--font-sans);
  color: var(--c-error);
  pointer-events: none;
}

.form-field__error[hidden] {
  display: none !important;
}