.site-header {
    position: relative;
    z-index: 1030;
    border-bottom: 1px solid #e7ebf0;
    background: #ffffff;
    box-shadow: 0 0.25rem 1rem rgba(33, 37, 41, 0.05);
    margin-bottom: 1rem;
}

.site-header nav.navbar {
    padding: 0.65rem 0;
    background: #ffffff !important;
    box-shadow: none;
}

.site-header__brand {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-right: 1.25rem;
    color: #198754;
    font-size: 1.15rem;
    line-height: 1.2;
    white-space: nowrap;
}

.site-header__brand:hover,
.site-header__brand:focus {
    color: #146c43;
}

.site-header__brand-icon {
    font-size: 1.55rem;
}

.site-header__collapse {
    gap: 0.85rem;
}

.site-header__nav,
.site-header__authors {
    flex: 0 0 auto;
}

.site-header nav.navbar .navbar-nav .site-header__nav-link {
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.65rem;
    border: 0;
    color: #273444;
    background: transparent;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.25;
    text-align: left;
    text-transform: none;
    white-space: nowrap;
}

.site-header nav.navbar .navbar-nav .site-header__nav-link:hover,
.site-header nav.navbar .navbar-nav .site-header__nav-link:focus,
.site-header nav.navbar .navbar-nav .site-header__nav-link.show {
    color: #198754;
}

.site-header__nav-icon {
    font-size: 1.25rem;
}

.site-header__nav-icon--genres {
    color: #dc3545;
}

.site-header__nav-icon--authors {
    color: #198754;
}

.site-header nav.navbar .site-header__dropdown {
    min-width: 15rem;
    padding: 0.45rem;
    border: 1px solid #e7ebf0;
    border-radius: 0.75rem;
    box-shadow: 0 0.5rem 1.5rem rgba(33, 37, 41, 0.1);
}

.site-header nav.navbar .site-header__dropdown .dropdown-item {
    padding: 0.55rem 0.7rem;
    border-radius: 0.5rem;
    color: #273444;
    font-size: 0.875rem;
    line-height: 1.35;
}

.site-header nav.navbar .site-header__dropdown .dropdown-item:hover,
.site-header nav.navbar .site-header__dropdown .dropdown-item:focus {
    background: #f0f7f3;
    color: #146c43;
}

.site-header__search {
    min-width: 0;
    flex: 1 1 24rem;
}

.site-header__search .input-group {
    flex-wrap: nowrap;
}

.site-header .site-header__search-icon {
    padding: 0 0.7rem;
    border-color: #dee2e6;
    border-right: 0;
    border-radius: 0.6rem 0 0 0.6rem;
    background: #ffffff;
    color: #6c757d;
}

.site-header .site-header__search-icon .material-icons {
    font-size: 1.25rem;
}

.site-header .site-header__search .form-control {
    min-width: 0;
    min-height: 42px;
    padding: 0.5rem 0.75rem;
    border-color: #dee2e6;
    border-left: 0;
    background: #ffffff;
    color: #273444;
    font-size: 0.9rem;
}

.site-header .site-header__search .form-control:focus {
    border-color: #86b7a0;
    box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.12);
}

.site-header .site-header__search-button {
    min-width: 86px;
    min-height: 42px;
    padding: 0.5rem 0.9rem;
    border-radius: 0 0.6rem 0.6rem 0;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: none;
}

.site-header__toggler {
    border-color: #dee2e6;
}

.site-header a:focus-visible,
.site-header button:focus-visible,
.site-header input:focus-visible {
    outline: 3px solid rgba(25, 135, 84, 0.25);
    outline-offset: 2px;
}

@media (max-width: 991.98px) {
    .site-header nav.navbar {
        padding: 0.6rem 0;
    }

    .site-header__brand {
        margin-right: 0.75rem;
    }

    .site-header__collapse {
        padding-top: 0.75rem;
    }

    .site-header__nav,
    .site-header__authors {
        width: 100%;
    }

    .site-header nav.navbar .navbar-nav .site-header__nav-link {
        width: 100%;
        padding: 0.55rem 0;
    }

    .site-header__search {
        width: 100%;
        margin: 0.4rem 0;
    }

    .site-header nav.navbar .site-header__dropdown {
        margin-bottom: 0.35rem;
        box-shadow: none;
    }
}

@media (max-width: 575.98px) {
    .site-header__brand {
        font-size: 1.05rem;
    }

    .site-header__brand-icon {
        font-size: 1.4rem;
    }

    .site-header .site-header__search-button {
        min-width: 72px;
        padding-inline: 0.7rem;
    }
}