:root {
    --primary-color: #003366;
    --secondary-color: #669933;
    --accent-color: #ff6600;
    --light-bg: #f8f9fa;
    --dark-bg: #212529;
}

/* use https://cdn.jsdelivr.net/gh/justfont/open-huninn-font@master/font/jf-openhuninn-2.1.ttf*/
@font-face {
    font-family: 'JF Open Huninn';
    src: url('https://cdn.jsdelivr.net/gh/justfont/open-huninn-font@master/font/jf-openhuninn-2.1.ttf') format('truetype');
}

body {
    font-family: 'JF Open Huninn', 'Arial', 'Microsoft JhengHei', sans-serif;
    line-height: 1.6;
}

.navbar {
    background-color: var(--primary-color);
}

.navbar-brand img {
    height: 40px;
    background-color: white;
    border-radius: 2pt;
}

.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('/api/placeholder/1200/600');
    background-size: cover;
    background-position: center;
    color: white;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.8);
    padding: 100px 0;
}

.research-card {
    border-left: 4px solid var(--secondary-color);
    transition: transform 0.3s;
}

.research-card:hover {
    transform: translateY(-5px);
}

.material-icons {
    vertical-align: middle;
}

.section-heading {
    padding-bottom: 15px;
    margin-bottom: 30px;
}

.section-heading span {
    padding: 10px;
    border-bottom: 5px solid var(--accent-color);
}

.footer {
    background-color: var(--dark-bg);
    color: white;
}

.publication-item {
    border-bottom: 1px solid #eee;
    padding: 15px 0;
}

.team-member {
    transition: transform 0.3s;
}

.team-member:hover {
    transform: translateY(-5px);
}

.contact-info {
    border-left: 3px solid var(--secondary-color);
}

.announcement-item {
    border-left: 4px solid var(--secondary-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.announcement-item:hover {
    border-left-color: var(--accent-color);
    transform: translateX(5px);
    background-color: rgba(102, 153, 51, 0.05);
}

.announcement-badge {
    font-size: 0.8rem;
}

.announcement-date {
    color: #6c757d;
    font-size: 0.9rem;
}

.announcement-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 8px;
}

.announcement-important {
    border-left-color: var(--accent-color);
    background-color: rgba(255, 102, 0, 0.05);
}

.announcement-new::before {
    content: 'NEW';
    background-color: #dc3545;
    color: white;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 3px;
    margin-right: 8px;
    font-weight: bold;
}

.carousel {
    aspect-ratio: 16 / 9;
    width: 100%;
    height: 100%;
}

.carousel .carousel-inner, .carousel .carousel-inner .carousel-item {
    width: 100%;
    height: 100%;
}

.carousel .carousel-inner .carousel-item .block-bg {
    height: 100%;
    background-position: center;
    background-size: cover;
}