/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #000000;
    --secondary-color: #FFD700;
    --accent-color: #FFD700;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --border-color: #E0E0E0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--bg-white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.02rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo a:hover {
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--accent-color);
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: var(--transition);
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 600px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1a1a1a 50%, var(--accent-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--bg-white);
    margin-top: 70px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><rect fill="%23000000" width="1200" height="600"/><path d="M0,300 Q300,200 600,300 T1200,300 L1200,600 L0,600 Z" fill="%23FFD700" opacity="0.2"/></svg>') no-repeat center center;
    background-size: cover;
    opacity: 0.1;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 0 20px;
}

.hero-title {
    font-size: 2.1rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    line-height: 1.2;
    margin-bottom: 0.45rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.hero-institution {
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 0.85rem;
    opacity: 0.92;
}

.professor-title {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 1rem;
    opacity: 0.95;
}

.tagline {
    font-size: 0.98rem;
    font-weight: 400;
    font-style: normal;
    line-height: 1.5;
    max-width: 32rem;
    margin: 0 auto 1.75rem;
    opacity: 0.88;
}

.hero-image-placeholder {
    width: 100%;
    max-width: 600px;
    height: 300px;
    margin: 2rem auto;
    background: rgba(255, 255, 255, 0.1);
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 1rem;
    opacity: 0.8;
}

.hero-image-wrap {
    width: 100%;
    max-width: 700px;
    margin: 2rem auto;
}

.hero-image-wrap .hero-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    display: block;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: #FFEB3B;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background-color: transparent;
    color: var(--bg-white);
    border: 2px solid var(--bg-white);
}

.btn-secondary:hover {
    background-color: var(--bg-white);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-media-popup {
    background-color: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-media-popup:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Modal / popup */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.modal-overlay.is-open .modal {
    transform: scale(1);
}

.modal {
    background-color: var(--bg-white);
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: 8px;
    box-shadow: var(--shadow-hover);
    padding: 2.5rem 3rem;
    position: relative;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.75rem;
    line-height: 1;
    color: var(--text-dark);
    cursor: pointer;
    padding: 0.25rem;
    transition: color 0.2s ease;
}

.modal-close:hover {
    color: var(--accent-color);
}

.modal-title {
    font-size: 1.85rem;
    color: var(--primary-color);
    margin-bottom: 0.35rem;
    padding-right: 2.5rem;
}

.modal-subtitle {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* Featured latest WISA blog in popup */
.modal-featured-blog {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.08) 0%, rgba(255, 215, 0, 0.02) 100%);
    border-left: 4px solid var(--accent-color);
    border-radius: 6px;
    padding: 1.5rem 1.75rem;
    margin-bottom: 2rem;
    transition: box-shadow 0.25s ease, border-left-color 0.25s ease;
}

.modal-featured-blog:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.modal-featured-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.modal-featured-title {
    display: block;
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--primary-color);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.2s ease;
}

.modal-featured-title:hover {
    color: var(--accent-color);
}

.modal-featured-meta {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.modal-featured-desc {
    font-size: 0.95rem;
    color: var(--text-dark);
    line-height: 1.55;
    margin-bottom: 0.75rem;
}

.modal-featured-cta {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent-color);
    text-decoration: none;
    display: inline-block;
    transition: color 0.2s ease, transform 0.2s ease;
}

.modal-featured-cta:hover {
    color: var(--primary-color);
}

.modal-more-heading {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.modal-media-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.modal-media-item h3 {
    font-size: 1.25rem;
    margin-bottom: 0.4rem;
}

.modal-media-item h3 a {
    color: var(--primary-color);
    text-decoration: none;
}

.modal-media-item h3 a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.modal-media-meta {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 0.35rem;
}

.modal-media-desc {
    font-size: 1rem;
    color: var(--text-dark);
    line-height: 1.6;
}

.modal-footer-link {
    margin-top: 2rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
    font-size: 1.05rem;
}

.modal-footer-link a {
    color: var(--accent-color);
    font-weight: 600;
    text-decoration: none;
}

.modal-footer-link a:hover {
    text-decoration: underline;
}

/* Sections */
/* Inner pages: clear fixed navbar */
.page-content {
    padding-top: 80px;
}

.section {
    padding: 80px 0;
}

.section-alt {
    background-color: var(--bg-light);
}

.section-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.55rem;
    text-align: center;
    letter-spacing: 0.02em;
    line-height: 1.3;
}

.section-subtitle {
    text-align: center;
    color: rgba(0, 0, 0, 0.52);
    font-size: 0.9rem;
    font-weight: 400;
    line-height: 1.55;
    max-width: 36rem;
    margin: 0 auto 2.25rem;
    letter-spacing: 0.01em;
}

/* About Section */
.about-content {
    margin-bottom: 4rem;
}

.about-text {
    margin-bottom: 2rem;
}

.about-text h3 {
    font-family: Georgia, "Times New Roman", Times, serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--border-color);
    letter-spacing: 0.02em;
}

.about-quote {
    margin: 0 0 1rem 0;
    padding: 1rem 1.5rem;
    border-left: 4px solid var(--accent-color);
    background-color: var(--bg-light);
    font-style: italic;
}

.about-quote p {
    margin: 0;
    color: var(--text-dark);
    font-style: italic;
}

.about-citation {
    margin-top: 0.5rem;
    font-size: 0.95rem;
    color: var(--text-light);
}

.about-citation .link-placeholder {
    font-style: normal;
}

/* Professor Photo */
.professor-photo-container {
    float: right;
    margin: 0 0 1.5rem 2rem;
    max-width: 250px;
}

.professor-photo {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: var(--shadow);
    border: 3px solid var(--accent-color);
}

.placeholder-text {
    color: var(--text-light);
    font-style: italic;
    line-height: 1.8;
}

.team-section h3,
.team-section-heading {
    font-family: Georgia, "Times New Roman", Times, serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1.25rem;
    text-align: center;
    letter-spacing: 0.02em;
}

.team-section-heading {
    margin-top: 2.5rem;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.18);
    text-align: left;
}

.team-members-list {
    list-style: none;
    margin-bottom: 1rem;
    padding-left: 0;
}

.team-members-list li {
    padding: 0.35rem 0;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-color);
}

.team-members-list li:last-child {
    border-bottom: none;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* 3 cards per row for specific sections */
.team-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 900px) {
    .team-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.team-card {
    background-color: var(--bg-white);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.team-placeholder-img {
    width: 150px;
    height: 150px;
    margin: 0 auto 1rem;
    background-color: var(--bg-light);
    border-radius: 50%;
    border: 3px solid var(--border-color);
}

.team-card-photo {
    width: 150px;
    height: 150px;
    margin: 0 auto 1rem;
    display: block;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border-color);
}

.team-card h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.team-card h4 a {
    color: inherit;
    text-decoration: none;
}

.team-card h4 a:hover {
    color: var(--accent-color);
}

/* Small name-only cards (e.g. students list) */
.team-card-sm {
    padding: 0.75rem 1rem;
}

.team-card-sm h4 {
    margin: 0;
    font-size: 0.95rem;
}

.team-grid-sm {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
}

.team-role {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* Research Section */
.research-subsection {
    margin-bottom: 4rem;
}

.research-subsection:last-child {
    margin-bottom: 0;
}

.dissemination-subsection {
    margin-bottom: 4rem;
}

.dissemination-subsection:last-child {
    margin-bottom: 0;
}

.dissemination-subsection .publications-list {
    margin-top: 0.5rem;
}

.back-link {
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.back-link a {
    color: var(--accent-color);
    font-weight: 600;
    text-decoration: none;
}

.back-link a:hover {
    text-decoration: underline;
}

.subsection-title {
    font-family: Georgia, "Times New Roman", Times, serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1.1rem;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.18);
    letter-spacing: 0.02em;
}

/* Research overview cards (research.html landing) */
.research-overview-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

@media (min-width: 768px) {
    .research-overview-cards {
        grid-template-columns: repeat(3, 1fr);
    }

    .dissemination-overview-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

.research-overview-card {
    display: block;
    padding: 1.75rem;
    background-color: var(--bg-white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    border: 2px solid var(--border-color);
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.research-overview-card:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-hover);
}

.research-overview-card .subsection-title {
    margin-bottom: 0.75rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 1rem;
}

.research-overview-card .placeholder-text {
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.research-overview-link {
    font-weight: 600;
    color: var(--accent-color);
}

.projects-grid {
    display: grid;
    gap: 3rem;
    margin-top: 2rem;
}

.project-card {
    background-color: var(--bg-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.project-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
}

.project-image-placeholder {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1a1a1a 50%, var(--accent-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 1.1rem;
    opacity: 0.8;
}

.project-image-placeholder .project-main-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    font-size: 1.75rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.project-content h4 {
    font-size: 1.25rem;
    color: var(--accent-color);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.subcategory-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-top: 1rem;
    margin-bottom: 0.25rem;
}

/* Publications Section */
.publications-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 2rem;
}

.publication-item {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--accent-color);
    transition: var(--transition);
}

.publication-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateX(5px);
}

.publication-item h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.publication-authors {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.publication-venue {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.publication-abstract {
    margin-top: 1rem;
}

.publication-abstract summary {
    cursor: pointer;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.publication-abstract p {
    margin-top: 0.5rem;
    padding-left: 1rem;
}

.publication-links {
    margin-top: 1rem;
}

.link-placeholder {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.link-placeholder:hover {
    text-decoration: underline;
}

/* Tools Section */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tool-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.tool-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tool-links {
    margin-top: 1rem;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.contact-info h3,
.contact-form-container h3 {
    font-size: 1.75rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.contact-item {
    margin-bottom: 2rem;
}

.contact-item h4 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.contact-item p {
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    color: var(--text-dark);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.2);
}

.form-group textarea {
    resize: vertical;
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: var(--bg-white);
    padding: 2rem 0;
    text-align: center;
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: var(--bg-white);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--secondary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 2rem 0;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        padding: 0.5rem 0;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-institution {
        font-size: 0.95rem;
    }

    .hero-image-placeholder {
        height: 200px;
        margin: 1.5rem auto;
    }

    .hero-image-wrap {
        max-width: 100%;
        margin: 1.5rem auto;
    }

    .home-tiles {
        grid-template-columns: 1fr;
        gap: 0.9rem;
        margin-top: 1.75rem;
    }

    .professor-title {
        font-size: 1.25rem;
    }

    .tagline {
        font-size: 0.92rem;
    }

    .section-title {
        font-size: 1.25rem;
    }

    .professor-photo-container {
        float: none;
        margin: 0 auto 1.5rem;
        max-width: 200px;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

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

    .team-grid-3 {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.55rem;
    }

    .hero-institution {
        font-size: 0.88rem;
    }

    .tagline {
        font-size: 0.88rem;
    }

    .section-title {
        font-size: 1.15rem;
    }

    .hero-image-placeholder {
        height: 150px;
        font-size: 0.9rem;
    }

    .hero-image-wrap {
        margin: 1rem auto;
    }

    .subsection-title {
        font-size: 1rem;
    }

    .home-tile {
        padding: 1.1rem;
    }

    .section {
        padding: 60px 0;
    }

    .project-content,
    .publication-item,
    .tool-card {
        padding: 1.5rem;
    }
}