/* ================================================================
   ACR — Header / Navigation
================================================================ */

/* ─── Top bar (faculty / admin links) ───────────────────────── */
.header-top {
    background: var(--maroon-dark);
    padding: 0.35rem 0;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.7);
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-top .header-admin-bar {
    display: flex;
    gap: 1rem;
}

.header-top a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color var(--transition);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.header-top a:hover {
    color: var(--gold-light);
}

/* ─── Brand bar ──────────────────────────────────────────────── */
.header-brand {
    background: var(--maroon);
    padding: 1rem 0;
    border-bottom: 2px solid var(--gold);
}

.brand-link {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    color: #fff;
    text-decoration: none;
}

.brand-link:hover {
    color: var(--gold-light);
}

.brand-abbr {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 2px;
    line-height: 1;
    min-width: 64px;
}

.brand-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.brand-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    color: #fff;
    line-height: 1.2;
}

.brand-issn {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.65);
    letter-spacing: 0.04em;
}

/* ─── Main nav ───────────────────────────────────────────────── */
.main-nav {
    background: var(--bg-card);
    box-shadow: 0 2px 8px rgba(217, 74, 7, 0.08);
    position: sticky;
    top: 0;
    z-index: 900;
}

.main-nav .container {
    display: flex;
    align-items: stretch;
    gap: 0;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
}

.nav-list > li > a,
.nav-list > li > .dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.875rem 1rem;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
    text-decoration: none;
    font-family: var(--font-body);
}

.nav-list > li > a:hover,
.nav-list > li > .dropdown-trigger:hover {
    color: var(--maroon);
    border-bottom-color: var(--gold);
    background: var(--bg-alt);
}

.nav-list > li.active > a {
    color: var(--maroon);
    border-bottom-color: var(--maroon);
}

.nav-list > li > a.active {
    color: var(--maroon);
    border-bottom-color: var(--maroon);
}

.dropdown-panel a.active {
    color: var(--maroon);
    font-weight: 600;
}

/* ─── Dropdown ───────────────────────────────────────────────── */
.has-dropdown {
    position: relative;
}

.dropdown-trigger .fa-chevron-down {
    font-size: 0.7rem;
    transition: transform var(--transition);
}

.has-dropdown.open .dropdown-trigger .fa-chevron-down,
.has-dropdown:focus-within .dropdown-trigger .fa-chevron-down {
    transform: rotate(180deg);
}

.dropdown-panel {
    display: none;
    position: absolute;
    top: calc(100% + 2px);
    left: 0;
    background: var(--bg-card);
    min-width: 210px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    list-style: none;
    padding: 0.4rem 0;
    z-index: 1000;
}

.has-dropdown:hover .dropdown-panel,
.has-dropdown.open .dropdown-panel {
    display: block;
}

.dropdown-panel li a {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.65rem 1.1rem;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition);
    text-decoration: none;
}

.dropdown-panel li a:hover {
    background: var(--bg-alt);
    color: var(--maroon);
    padding-left: 1.4rem;
}

.dropdown-panel li a i {
    width: 1rem;
    text-align: center;
    color: var(--gold-dark);
}

/* ─── Submit CTA in nav ──────────────────────────────────────── */
.nav-submit-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1.1rem;
    margin: auto 0 auto auto;
    background: var(--maroon);
    color: #fff !important;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    white-space: nowrap;
}

.nav-submit-btn:hover {
    background: var(--maroon-dark);
    color: #fff !important;
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

/* ─── Mobile toggle ──────────────────────────────────────────── */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.875rem 0;
    margin-left: auto;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--maroon);
    border-radius: 2px;
    transition: all var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ─── Mobile styles ──────────────────────────────────────────── */
@media (max-width: 900px) {
    .nav-toggle {
        display: flex;
    }

    .main-nav .container {
        flex-wrap: wrap;
        padding-right: 1rem;
    }

    .nav-list {
        display: none;
        flex-direction: column;
        width: 100%;
        border-top: 1px solid var(--border-light);
        padding: 0.5rem 0 1rem;
    }

    .nav-list.open {
        display: flex;
    }

    .nav-list > li > a,
    .nav-list > li > .dropdown-trigger {
        padding: 0.75rem 1rem;
        border-bottom: none;
        border-left: 3px solid transparent;
        width: 100%;
        justify-content: flex-start;
    }

    .nav-list > li > a:hover,
    .nav-list > li > .dropdown-trigger:hover {
        border-left-color: var(--gold);
        border-bottom: none;
    }

    .dropdown-panel {
        position: static;
        box-shadow: none;
        border: none;
        border-radius: 0;
        background: var(--bg-alt);
        padding: 0;
        min-width: 0;
    }

    .has-dropdown.open .dropdown-panel,
    .has-dropdown:hover .dropdown-panel {
        display: block;
    }

    .dropdown-panel li a {
        padding-left: 2.5rem;
    }

    .nav-submit-btn {
        display: none;
    }

    .header-top .header-faculty {
        display: none;
    }
}

@media (max-width: 480px) {
    .brand-abbr {
        font-size: 1.75rem;
    }

    .brand-title {
        font-size: 0.9rem;
    }
}