.forum__header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 10px;
    margin: 2px 0;
}

.forum__header__title {
    font-size: 2em;
    line-height: 1.5em;
    color: inherit;
    text-decoration: none;
    padding: 0 5px;
}
.forum__header__title[href]:hover {
    text-decoration: underline;
}
.forum__header__title--fill {
    width: 100%;
}

.forum__header__input {
    width: 100%;
    background-color: transparent;
    border: 0;
    padding: 0;
    margin: 0;
    box-shadow: initial;
    font-size: 1em;
    font-family: inherit;
}

.forum__header__breadcrumbs {
    display: flex;
    font-size: 1.1em;
    line-height: 1.5em;
    align-items: center;
}
.forum__header__breadcrumb {
    color: var(--accent-colour);
    text-decoration: none;
    padding: 2px 5px;
}
.forum__header__breadcrumb:hover {
    text-decoration: underline;
}
.forum__header__breadcrumb__separator {
    color: var(--accent-colour);
    margin: 0 4px;
    font-size: .9em;
}

.forum__header__actions {
    display: flex;
}
.forum__header__action {
    color: inherit;
    text-decoration: none;
    transition: color .2s;
    padding: 2px 5px;
    transition: opacity .2s;
}
.forum__header__action:hover,
.forum__header__action:focus {
    color: var(--accent-colour);
}
.forum__header__action:not(:last-child) {
    margin-right: 5px;
}
.forum__header__action[disabled] {
    opacity: .4;
}