/* ---------- Global ---------- */

body {
    margin: 0;
    font-family: Arial, sans-serif;
}

/* ---------- Navbar ---------- */

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #0b3d91;
    padding: 0 24px;
    height: 60px; /* gives breathing room for 60px logo */
}

.nav-logo img {
    height: 80px;
    width: auto;
    display: block;
}

/* ---------- Nav Links ---------- */

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

.nav-links li {
    position: relative;
}

.nav-links a {
    display: block;
    padding: 17px 20px;
    color: white;
    text-decoration: none;
    font-size: 20px;
}

.nav-links a:hover {
    background-color: #092f70;
}

/* ---------- Dropdown (Working Groups) ---------- */

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #0b3d91;
    list-style: none;
    padding: 0;
    margin: 0;
    min-width: 230px;
    z-index: 1000;
}

.dropdown-menu li a {
    padding: 14px 18px;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

/* ---------- Dropdown (Science) ---------- */

.dropdown-menu-res {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #0b3d91;
    list-style: none;
    padding: 0;
    margin: 0;
    min-width: 129px;
    z-index: 1000;
}

.dropdown-menu-res li a {
    padding: 14px 18px;
}

.dropdown:hover .dropdown-menu-res {
    display: block;
}

/* ---------- Page Content ---------- */

.content {
    padding: 40px;
}

.content h1 {
    margin-top: 0;
}

main {
    padding-bottom: 3rem;
}

/* ---------- Footer ---------- */

.site-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    font-size: 0.85rem;
    color: #666;
    border-top: 1px solid #e0e0e0;
    background-color: #f5f5f5;  /* light gray */
}

.site-footer a img {
    height: 32px;
    max-height: 32px;
    width: auto;
    display: block;
}

.funder-logo {
    height: 32px;
    width: auto;
    max-height: 32px;
}

@media (max-width: 600px) {
    .site-footer {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* ---------- Team Page ---------- */

.team-group {
    margin-top: 50px;
}

.team-group h2 {
    border-bottom: 2px solid #ddd;
    padding-bottom: 8px;
    margin-bottom: 25px;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 30px;
}

.team-member {
    text-align: center;
}

.team-member img {
    width: 160px;
    height: 160px;
    object-fit: cover;
    border-radius: 50%;
    margin-bottom: 10px;
}

.team-member h3 {
    margin: 8px 0 4px;
    font-size: 16px;
}

.team-member p {
    margin: 0;
    font-size: 14px;
    color: #555;
}

/* Team member name links: subtle, non-jarring */
.team-member h3 a {
    color: inherit;
    text-decoration: none;
    cursor: pointer;
    position: relative;
}

/* Underline appears only on hover */
.team-member h3 a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 1px;
    background-color: currentColor;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.team-member h3 a:hover::after {
    opacity: 0.85;
}

.team-member .team-link {
    color: inherit;
    text-decoration: none;
    display: inline-block;
}

.team-member .team-link:hover h3 {
    text-decoration: underline;
}

/* ---------- Working Group Figures ---------- */

.wg-figure {
    max-width: 800px;
    margin: 40px auto;
    text-align: center;
}

.wg-figure img {
    width: 100%;
    height: auto;
    border-radius: 6px;
}

.wg-figure figcaption {
    margin-top: 10px;
    font-size: 14px;
    color: #555;
}

/* ---------- Publications Page ---------- */

.pub-section {
    margin-top: 40px;
}

.pub-section h2 {
    border-bottom: 2px solid #ddd;
    padding-bottom: 6px;
    margin-bottom: 20px;
}

.pub-list {
    list-style: none;
    padding-left: 0;
}

.pub-list li {
    margin-bottom: 15px;
    line-height: 1.5;
}

.pub-list a {
    margin-left: 6px;
    color: #0b3d91;
    text-decoration: none;
}

.pub-list a:hover {
    text-decoration: underline;
}

/* Publication list: restore bullets, clean spacing */
.pub-list {
    list-style-type: disc;
    padding-left: 1.5rem;   /* controls bullet indentation */
    margin-top: 0.5rem;
}

.pub-list li {
    margin-bottom: 0.75rem; /* space between papers */
    line-height: 1.5;
}

/* ---------- Hero Banner ---------- */

.hero {
    position: relative;
    min-height: 480px;   /* allows taller images */
    background-image: url("../images/hero-earth.jpg");
    background-size: cover;
    background-position: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;            /* shorthand for top/right/bottom/left = 0 */
    background: rgba(0, 0, 0, 0.45);
    color: white;
    display: flex;
    align-items: center; /* vertical centering */
}

.hero-content {
    padding: 60px;
    max-width: 900px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 15px;
}

.hero p {
    font-size: 20px;
    line-height: 1.4;
}

/* ---------- Home Sections ---------- */

.home-section {
    padding: 60px 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.gray-bg {
    background-color: #f5f5f5;
}

.home-section h2 {
    margin-top: 0;
    margin-bottom: 20px;
}

.three-panel {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.three-panel figure {
    margin: 0;
    position: relative;
}

.three-panel img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
}

.three-panel figcaption {
    position: absolute;
    bottom: 0.5rem;
    left: 0.75rem;
    right: 0.75rem;
    color: #ffffff;
    font-size: 0.95rem;
    background: rgba(0, 0, 0, 0.45);
    padding: 0.3rem 0.5rem;
    border-radius: 3px;
}

@media (max-width: 900px) {
    .three-panel {
        grid-template-columns: 1fr;
    }
}

/* ---------- Working Group Cards ---------- */

.wg-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.wg-card {
    background: white;
    border: 1px solid #ddd;
    padding: 30px;
    text-align: center;
    text-decoration: none;
    color: inherit;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.wg-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.wg-card h3 {
    margin: 0;
    font-size: 28px;
    color: #0b3d91;
}

.wg-card p {
    margin-top: 10px;
    font-size: 16px;
}

/* ---------- Goals ---------- */

.goals-list {
    padding-left: 20px;
    font-size: 16px;
}

.goals-list li {
    margin-bottom: 10px;
}