.c-radio {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  user-select: none;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: var(--leading-snug);
}
.c-radio.is-disabled { cursor: not-allowed; opacity: 0.55; }

.c-radio__input {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}

.c-radio__visual {
  width: 18px;
  height: 18px;
  border: 1px solid var(--color-border-strong);
  border-radius: 50%;
  background: var(--color-bg-raised);
  flex-shrink: 0;
  position: relative;
  transition:
    background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}
.c-radio__visual::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  width: 8px;
  height: 8px;
  background: var(--color-text-on-accent);
  border-radius: 50%;
  opacity: 0;
  transform: scale(0.4);
  transition: opacity var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}
.c-radio__input:checked + .c-radio__visual {
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.c-radio__input:checked + .c-radio__visual::after {
  opacity: 1;
  transform: scale(1);
}
.c-radio__input:focus-visible + .c-radio__visual {
  outline: none;
  box-shadow: var(--shadow-glow-accent);
}

/* Radio group */
.c-radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.c-radio-group__label {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
}
.c-radio-group__items {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.c-radio-group--horizontal .c-radio-group__items {
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--space-4);
}