.portal-header {
    position: sticky;
    top: 0;
    z-index: 200;
    width: 100%;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background-color: var(--white-color);
    border-bottom: 1px solid var(--gray-color);
    box-sizing: border-box;
}

.portal-header__logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--black-color);
}

.portal-header__logo-title {
    font-size: 20px;
    font-weight: bold;
}

.portal-header__burger {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.portal-header__burger-line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--black-color);
    border-radius: 2px;
    transition:
        transform 0.25s ease,
        opacity 0.25s ease;
}

.portal-header__burger.is-open .portal-header__burger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.portal-header__burger.is-open .portal-header__burger-line:nth-child(2) {
    opacity: 0;
}
.portal-header__burger.is-open .portal-header__burger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile nav drawer */
.portal-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--white-color);
    z-index: 150;
    display: flex;
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    overflow-y: auto;
}

.portal-nav.is-open {
    transform: translateX(0);
}

.portal-nav__link {
    display: block;
    padding: 12px 8px;
    font-size: 1rem;
    color: var(--black-color);
    text-decoration: none;
    border-radius: 4px;
    border-bottom: 1px solid var(--gray-color);
}

.portal-nav__link:last-child {
    border-bottom: none;
}

.portal-nav__link:hover,
.portal-nav__link.active {
    background-color: var(--light-gray-color);
    color: var(--primary-color);
}

.portal-nav__divider {
    flex: 1;
}

.portal-nav__auth {
    padding: 12px 8px;
    font-size: 0.9rem;
    color: var(--dark-gray-color);
}

.portal-nav__logout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 12px 8px;
    color: var(--black-color);
    background: none;
    border: none;
    border-bottom: 1px solid var(--gray-color);
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
}

.portal-nav__logout:hover {
    color: var(--primary-color);
}

@media (min-width: 768px) {
    .portal-header__burger {
        display: none;
    }

    .portal-nav {
        position: static;
        transform: none;
        flex-direction: row;
        align-items: center;
        padding: 0;
        gap: 4px;
        background: none;
        overflow: visible;
    }

    .portal-nav__link {
        padding: 8px 12px;
        font-size: 0.95rem;
        border-bottom: none;
        white-space: nowrap;
    }

    .portal-nav__divider {
        flex: 0;
        width: 16px;
    }

    .portal-nav__auth {
        padding: 8px 12px;
    }

    .portal-nav__logout {
        padding: 8px 12px;
        font-size: 0.95rem;
        border-bottom: none;
        width: auto;
        white-space: nowrap;
    }
}