/**
 * Polyglot Pages Theme — Header & Navigation
 * Nasaon Digital Agency — Midnight Blue + Coral
 */

.pkp_structure_head {
    background: var(--pp-primary);
    box-shadow: 0 2px 20px rgba(27,58,107,0.25);
    position: sticky;
    top: 0;
    z-index: 100;
}

.pkp_head_wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    flex-wrap: nowrap;
    gap: 12px;
}

.pkp_site_name_wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.pkp_site_name_wrapper img {
    height: 40px;
    width: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255,255,255,0.25);
    flex-shrink: 0;
}
.pkp_site_name_wrapper .site_name {
    display: flex;
    flex-direction: column;
}
.pkp_site_name_wrapper .site_name a {
    font-family: var(--pp-font-serif);
    font-size: 0.9rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
    white-space: nowrap;
}
.pkp_site_name_wrapper .site_name a:hover { color: var(--pp-accent); }
.pp-nav-subtitle {
    color: rgba(255,255,255,0.7);
    font-size: 0.58rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 300;
}

nav.pkp_navigation_primary { flex: 1; overflow: hidden; }
nav.pkp_navigation_primary ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 2px;
    flex-wrap: nowrap;
    justify-content: center;
}
nav.pkp_navigation_primary ul li a {
    color: rgba(255,255,255,0.85);
    font-size: 0.75rem;
    font-weight: 400;
    padding: 5px 9px;
    border-radius: var(--pp-radius-pill);
    transition: var(--pp-transition);
    letter-spacing: 0.02em;
    white-space: nowrap;
}
nav.pkp_navigation_primary ul li a:hover,
nav.pkp_navigation_primary ul li.current > a {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

nav.pkp_navigation_user ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}
nav.pkp_navigation_user ul li a {
    color: rgba(255,255,255,0.75);
    font-size: 0.72rem;
    transition: var(--pp-transition);
    white-space: nowrap;
}
nav.pkp_navigation_user ul li a:hover { color: #fff; }
nav.pkp_navigation_user ul li.register a {
    background: var(--pp-accent);
    color: #fff;
    padding: 5px 12px;
    border-radius: var(--pp-radius-pill);
    font-weight: 600;
    font-size: 0.72rem;
}
nav.pkp_navigation_user ul li.register a:hover { background: #c94428; }

.pp-issn-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: rgba(255,255,255,0.1);
    border: 0.5px solid rgba(255,255,255,0.2);
    color: rgba(255,255,255,0.75);
    font-size: 0.6rem;
    letter-spacing: 0.08em;
    padding: 3px 8px;
    border-radius: var(--pp-radius-pill);
    margin-left: 8px;
    white-space: nowrap;
    flex-shrink: 0;
}

/* ── Hamburger Menu ─────────────────────────────────────── */
.pp-hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 36px;
    height: 26px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    flex-shrink: 0;
}

.pp-hamburger span {
    display: block;
    width: 100%;
    height: 2.5px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.pp-hamburger.pp-open span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.pp-hamburger.pp-open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.pp-hamburger.pp-open span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

@media (max-width: 768px) {
    .pp-hamburger {
        display: flex;
    }

    .pkp_navigation_primary {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--pp-primary);
        z-index: 1000;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: 80px 24px 40px;
    }

    .pkp_navigation_primary.pp-nav-open {
        display: flex;
    }

    .pkp_navigation_primary ul {
        flex-direction: column;
        align-items: center;
        gap: 0;
        width: 100%;
    }

    .pkp_navigation_primary ul li {
        width: 100%;
        text-align: center;
        border-bottom: 0.5px solid rgba(255,255,255,0.1);
    }

    .pkp_navigation_primary ul li a {
        display: block;
        padding: 18px 24px;
        font-size: 1.1rem;
        color: #fff;
        font-weight: 600;
        letter-spacing: 0.05em;
    }

    .pkp_navigation_primary ul li a:hover {
        background: rgba(255,255,255,0.1);
        color: var(--pp-accent);
    }
}