#topbar {
    background: #e96b56;
    color: #fff;
    padding: 10px 0;
    font-size: 14px;
}

#topbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

#affiliation-code {
    font-size: 15px;
    white-space: nowrap;
}

#affiliation-number {
    font-weight: bold;
    font-size: 16px;
}

marquee.notification {
    flex: 1;
    margin-left: 20px;
    color: #fff;
    white-space: nowrap;
}

marquee.notification * {
    display: inline;
    white-space: nowrap;
}

marquee.notification sup img {
    width: 20px;
    height: auto;
    vertical-align: middle;
}

marquee.notification a {
    color: #ffd700;
    text-decoration: none;
}

marquee.notification a:hover {
    text-decoration: underline;
}

#header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 997;
}

#header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.logo {
    flex-shrink: 0;
}

.logo img {
    max-height: 60px;
    width: auto;
}

.navbar {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    position: relative;
}

.navbar ul {
    list-style: none;
    display: flex;
    align-items: center;
    margin: 0;
    padding: 0;
    flex-wrap: nowrap;
}

.navbar > ul > li {
    position: relative;
    margin: 0;
    padding: 0 3px;
}

.navbar a {
    color: #333;
    font-size: 13px;
    font-weight: 500;
    padding: 10px 8px;
    display: block;
    transition: all 0.3s ease;
    white-space: nowrap;
    text-decoration: none;
}

.navbar a:hover,
.navbar .active,
.navbar li:hover > a {
    color: #e96b56;
}

.location-logo {
    width: 35px;
    height: 35px;
    object-fit: contain;
    vertical-align: middle;
}

.navbar .dropdown {
    position: relative;
}

.navbar .dropdown > a::after {
    content: '';
    display: none;
}

.navbar .dropdown ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    box-shadow: 0 5px 15px rgba(0,0,0,0.15);
    min-width: 220px;
    padding: 10px 0;
    z-index: 99;
    border-top: 3px solid #e96b56;
    border-radius: 0 0 5px 5px;
}

.navbar .dropdown:hover > ul {
    display: block;
}

.navbar .dropdown ul li {
    margin: 0;
}

.navbar .dropdown ul a {
    padding: 10px 20px;
    font-size: 14px;
    color: #555;
}

.navbar .dropdown ul a:hover {
    background: #f8f9fa;
    color: #e96b56;
    padding-left: 25px;
}

.mobile-nav-toggle {
    display: none;
    font-size: 28px;
    cursor: pointer;
    color: #333;
    background: none;
    border: none;
    padding: 5px 10px;
    margin-left: 10px;
}

.dropdown-toggle {
    display: none;
    background: none;
    border: none;
    color: #333;
    font-size: 18px;
    cursor: pointer;
    padding: 5px 10px;
    margin-left: 10px;
    transition: all 0.3s ease;
}

.dropdown-toggle.active {
    color: #e96b56;
    transform: rotate(180deg);
}

@media (max-width: 991px) {
    #topbar .container {
        flex-direction: column;
        text-align: center;
    }

    marquee.notification {
        margin-left: 0;
        margin-top: 10px;
        width: 100%;
    }

    #header .container {
        gap: 10px;
    }

    .mobile-nav-toggle {
        display: block;
    }

    .navbar {
        position: relative;
    }

    .navbar ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        box-shadow: 0 5px 15px rgba(0,0,0,0.15);
        padding: 15px 0;
        max-height: 80vh;
        overflow-y: auto;
        width: 100vw;
        margin-left: calc(-50vw + 50%);
        border-top: 1px solid #eee;
    }

    .navbar.navbar-mobile ul {
        display: flex;
    }

    .navbar > ul > li {
        margin: 0;
        width: 100%;
        padding: 0;
        position: relative;
        border-bottom: 1px solid #f0f0f0;
    }

    .navbar > ul > li:last-child {
        border-bottom: none;
    }

    .navbar a {
        padding: 12px 20px;
        font-size: 15px;
        width: 100%;
        box-sizing: border-box;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .navbar .dropdown > a {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .dropdown-toggle {
        display: block;
        position: absolute;
        right: 15px;
        top: 50%;
        transform: translateY(-50%);
        padding: 0;
        margin: 0;
    }

    .navbar .dropdown ul {
        position: static;
        box-shadow: none;
        padding: 0;
        display: none;
        border-top: none;
        background: #f8f9fa;
        border-radius: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        width: 100%;
        margin: 0;
    }

    .navbar .dropdown.dropdown-active > ul {
        display: block;
        max-height: 500px;
    }

    .navbar .dropdown ul li {
        border-bottom: 1px solid #eee;
    }

    .navbar .dropdown ul li:last-child {
        border-bottom: none;
    }

    .navbar .dropdown ul a {
        padding: 12px 20px 12px 40px;
        font-size: 14px;
        border-left: 3px solid #e96b56;
        background: transparent;
    }

    .navbar .dropdown ul a:hover {
        background: #f0f0f0;
        padding-left: 45px;
    }
}

@media (max-width: 768px) {
    .logo img {
        max-height: 50px;
    }

    .navbar a {
        font-size: 14px;
        padding: 10px 12px;
    }

    #topbar {
        padding: 8px 0;
    }

    #topbar .container {
        flex-direction: column;
        gap: 8px;
    }

    marquee.notification {
        font-size: 12px;
        margin-top: 8px;
    }
}

@media (max-width: 480px) {
    .logo img {
        max-height: 45px;
    }

    .navbar a {
        font-size: 13px;
        padding: 10px 15px;
    }

    .navbar ul {
        width: 100vw !important;
    }

    .mobile-nav-toggle {
        font-size: 24px;
    }

    .dropdown-toggle {
        font-size: 16px;
    }

    #affiliation-code {
        font-size: 13px;
    }

    marquee.notification {
        font-size: 11px;
    }
}

@media (min-width: 992px) and (max-width: 1200px) {
    .navbar a {
        font-size: 12px;
        padding: 10px 6px;
    }
}