/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px; /* Offset for sticky nav */
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* Header */
.site-header {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
}

.header-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-color: #1e748a;
}

.header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.5));
    display: flex;
    align-items: center;
    justify-content: center;
}

.site-title {
    color: white;
    font-size: 4rem;
    font-weight: 700;
    text-align: center;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

/* Navigation */
.main-nav {
    background-color: #1e748a;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}

.main-nav a {
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    display: inline-block;
    transition: background-color 0.3s ease;
}

.main-nav a:hover {
    background-color: #26a3ba;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Section styles */
section {
    margin-bottom: 4rem;
    scroll-margin-top: 100px; /* Offset for sticky nav when jumping to sections */
}

.section-title {
    color: #1e748a;
    font-size: 2rem;
    margin-bottom: 1rem;
    border-bottom: 3px solid #1e748a;
    padding-bottom: 0.5rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e748a;
}

h2 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    color: #1e748a;
}

h3 {
    font-size: 1.4rem;
    margin: 1.5rem 0 0.5rem;
    color: #1e748a;
}

h4 {
    font-size: 1.1rem;
    margin: 0.5rem 0;
    color: #333;
}

hr {
    border: none;
    border-top: 1px solid #ddd;
    margin: 1.5rem 0;
}

p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

a {
    color: #1e748a;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* News section */
.news-section {
    background-color: #f8f9fa;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 3rem;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.news-item {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.news-date {
    color: #1e748a;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.news-content {
    color: #333;
    line-height: 1.6;
}

.news-link {
    color: #333;
    text-decoration: none;
    transition: color 0.3s ease;
}

.news-link:hover {
    color: #1e748a;
    text-decoration: underline;
}

.view-all-news {
    text-align: center;
    margin-top: 2rem;
}

.view-all-button {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: #1e748a;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    transition: background 0.3s, transform 0.3s;
}

.view-all-button:hover {
    background: #26a3ba;
    transform: translateY(-2px);
    text-decoration: none;
}

/* Research section */
.research-area {
    margin-bottom: 3rem;
}

.research-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    align-items: start;
    margin-bottom: 2rem;
}

.research-content.reverse {
    grid-template-columns: 2fr 1fr;
}

.research-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    background-color: #f0f0f0;
    min-height: 200px;
    object-fit: cover;
}

.research-text {
    padding: 1rem 0;
}

/* People section */
.person-highlight {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.person-highlight img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    background-color: #e0e0e0;
}

.person-title {
    color: #666;
    font-style: italic;
}

.people-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.person-card {
    text-align: center;
    padding: 1rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.person-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.person-card img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
    background-color: #e0e0e0;
}

/* Software section */
.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.software-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.software-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.software-logo {
    width: 120px;
    height: 120px;
    object-fit: contain;
    margin: 0 auto 1rem;
    display: block;
    background-color: white;
    padding: 1.5rem;
    border-radius: 12px;
    border: 2px solid #e8e8e8;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: border-color 0.3s, box-shadow 0.3s;
}

.software-card:hover .software-logo {
    border-color: #1e748a;
    box-shadow: 0 4px 8px rgba(30, 116, 138, 0.15);
}

.software-card h3 {
    color: #1e748a;
    margin: 1rem 0;
}

.software-card p {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 1rem;
    min-height: 60px;
}

.software-links {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e0e0e0;
}

.software-links a {
    color: #1e748a;
    margin: 0 0.5rem;
    font-size: 0.9rem;
}

/* Publications section */
.publications-section ul {
    list-style-type: none;
    padding-left: 0;
}

.publications-section li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.8;
}

.publications-section li:before {
    content: "•";
    color: #1e748a;
    font-weight: bold;
    font-size: 1.2rem;
    position: absolute;
    left: 0;
}

.publications-section em {
    color: #666;
}

.publications-section strong {
    color: #1e748a;
}

/* Contact section */
.contact-info {
    background-color: #f8f9fa;
    padding: 2rem;
    border-radius: 8px;
    max-width: 600px;
}

.contact-info p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.contact-info a {
    color: #1e748a;
}

/* Footer */
.site-footer {
    background-color: #1e748a;
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}

/* Responsive design */
@media (max-width: 768px) {
    .site-title {
        font-size: 2.5rem;
    }

    .main-nav {
        text-align: center;
    }

    .main-nav a {
        display: block;
        padding: 0.5rem;
    }

    .research-content,
    .research-content.reverse {
        grid-template-columns: 1fr;
    }

    .people-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }

    .software-grid {
        grid-template-columns: 1fr;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }

    .site-title {
        font-size: 2rem;
    }

    .person-card img {
        width: 120px;
        height: 120px;
    }
}

/* Image placeholder styling - only for people photos, not software logos */
img[src*="assets/images/people"] {
    background-color: #e0e0e0;
    background-image: linear-gradient(45deg, #f0f0f0 25%, transparent 25%, transparent 75%, #f0f0f0 75%, #f0f0f0),
                      linear-gradient(45deg, #f0f0f0 25%, transparent 25%, transparent 75%, #f0f0f0 75%, #f0f0f0);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
}

/* Software logos should NOT have the grid pattern */
.software-logo {
    background-image: none !important;
}

/* Modal styles */
.person-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.6);
}

.person-modal.active {
    display: block;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 12px;
    max-width: 600px;
    position: relative;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 2rem;
    font-weight: bold;
    color: #999;
    cursor: pointer;
    transition: color 0.3s;
    background: none;
    border: none;
    line-height: 1;
}

.modal-close:hover {
    color: #333;
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #1e748a;
}

.modal-header img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    background-color: #e0e0e0;
}

.modal-header h2 {
    color: #1e748a;
    margin: 0.5rem 0;
}

.modal-header .position {
    color: #666;
    font-style: italic;
    font-size: 1.1rem;
}

.modal-body {
    line-height: 1.8;
}

.modal-section {
    margin-bottom: 1.5rem;
}

.modal-section h3 {
    color: #1e748a;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.modal-section p {
    color: #333;
    margin: 0;
}

.modal-section a {
    color: #1e748a;
    word-break: break-all;
}

/* Make person cards clickable */
.person-card {
    cursor: pointer;
}

.person-highlight {
    cursor: pointer;
}