:root {
    --bg-color: #fff;
    --text-color: #2d3748;
    --text-secondary: #4a5568;
    --accent-color: #4a74b9;
    --accent-hover: #3a5c9e;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --animation-offset: 3px;
    --transition-time: 0.3s;
}

body {
    font-family: 'Merriweather', Georgia, 'Times New Roman', serif;
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
    padding: 1.5rem;
    color: var(--text-color);
    background-color: var(--bg-color);
    font-weight: 300;
}

header {
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-content {
    flex: 1;
}

.header-image img {
    width: 130px;
    height: 130px;
    object-fit: cover;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    transition: transform var(--transition-time) ease, box-shadow var(--transition-time) ease;
}

.header-image img:hover {
    transform: scale(1.02);
    box-shadow: 0 5px 15px var(--shadow-color);
}

h1 {
    font-size: 2.2rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.4rem;
    font-weight: 500;
    margin: 1.75rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    letter-spacing: -0.01em;
}


/* Navigation */

nav {
    margin-top: 1.5rem;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
}

nav a,
.social-links-header a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: all var(--transition-time) ease;
    font-weight: 400;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
}

nav a:hover,
.social-links-header a:hover {
    color: var(--accent-color);
    background-color: rgba(74, 116, 185, 0.08);
    transform: translateX(var(--animation-offset));
}

.social-links-header {
    display: flex;
    gap: 1.25rem;
    margin: 1.2rem 0;
}

.social-links-header a i {
    margin-right: 0.4rem;
}


/* Unified animation for elements (not sections) */

.publication-item,
.award-item,
.service-category,
.misc-item,
.news-list li {
    transition: transform var(--transition-time) ease;
}

.publication-item:hover,
.award-item:hover,
.service-category:hover,
.misc-item:hover,
.news-list li:hover {
    transform: translateX(var(--animation-offset));
}


/* Section animation */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(var(--animation-offset));
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

section {
    margin-bottom: 2rem;
    scroll-margin-top: 1rem;
    animation: fadeIn 0.8s ease-out;
    width: 100%;
}


/* Publication styles */

.publications-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.toggle-publications {
    background-color: rgba(74, 116, 185, 0.08);
    color: var(--accent-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-time) ease;
}

.toggle-publications:hover {
    background-color: var(--accent-color);
    color: white;
}

.publication-item {
    margin-bottom: 1.5rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 1.25rem;
}

.pub-thumbnail {
    width: 125px;
    height: 125px;
    flex-shrink: 0;
    border: 1px solid var(--border-color);
    overflow: hidden;
    cursor: pointer;
    position: relative;
    border-radius: 6px;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.pub-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-time) ease;
}

.pub-thumbnail:hover img {
    transform: scale(1.08);
}

.pub-content {
    flex: 1;
}

.pub-title {
    font-weight: 500;
    margin-bottom: 0.4rem;
    font-size: 1.05rem;
}

.pub-authors {
    font-size: 0.9rem;
    margin-bottom: 0.4rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.highlight-name {
    font-weight: 600;
    color: var(--accent-color);
}

.pub-venue-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.pub-venue {
    font-size: 0.9rem;
    font-style: italic;
    color: var(--text-secondary);
}

.pub-award {
    font-size: 0.85rem;
    font-weight: 500;
    color: #fff;
    background-color: var(--accent-color);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    display: inline-block;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    white-space: nowrap;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(74, 116, 185, 0.4);
    }
    70% {
        box-shadow: 0 0 0 6px rgba(74, 116, 185, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(74, 116, 185, 0);
    }
}

.pub-links {
    font-size: 0.85rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.pub-links a {
    color: var(--accent-color);
    transition: all var(--transition-time) ease;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    background-color: rgba(74, 116, 185, 0.08);
}

.pub-links a:hover {
    color: #fff;
    background-color: var(--accent-color);
    transform: translateX(3px);
    box-shadow: 0 2px 5px rgba(74, 116, 185, 0.2);
}


/* Awards section */

.award-item {
    display: flex;
    align-items: baseline;
    margin-bottom: 0.1rem;
}

.award-year {
    font-weight: 500;
    color: var(--accent-color);
    flex: 0 0 80px;
}

.award-desc {
    flex: 1;
}

.award-desc small {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-left: 0.5rem;
}


/* News section */

.news-container {
    max-height: 300px;
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.news-container::-webkit-scrollbar {
    display: none;
}

.news-list {
    padding-left: 0;
    list-style-type: none;
    margin: 0.5rem 0;
}

.news-list li {
    margin-bottom: 0.9rem;
    padding-left: 0.9rem;
    border-left: 2px solid rgba(74, 116, 185, 0.2);
    padding-bottom: 0.7rem;
}

.news-list li:hover {
    border-left-color: var(--accent-color);
}


/* Services and misc */

.service-title {
    font-weight: 500;
    margin-bottom: 0.35rem;
    color: var(--accent-color);
}

.service-category p,
.misc-item p {
    margin: 0.25rem 0 0.75rem;
}


/* Footer */

footer {
    margin-top: 2.5rem;
    padding-top: 1.2rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}


/* Generic styles */

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-time) ease;
}

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

em {
    font-style: italic;
    color: var(--text-secondary);
}

ul {
    padding-left: 1.25rem;
}

p {
    margin: 0.5rem 0 0.75rem;
}

strong {
    font-weight: 600;
    color: var(--accent-color);
}


/* Modal styles */

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    padding-top: 100px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.85);
    transition: opacity var(--transition-time);
    opacity: 0;
}

.modal.show {
    opacity: 1;
}

.modal-content {
    margin: auto;
    display: block;
    max-width: 85%;
    max-height: 85%;
    border-radius: 4px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    animation: zoom var(--transition-time) ease-out;
}

@keyframes zoom {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 35px;
    font-weight: normal;
    cursor: pointer;
    transition: color var(--transition-time);
    opacity: 0.8;
}

.modal-close:hover {
    color: #fff;
    opacity: 1;
    transform: scale(1.1);
}


/* Responsive design fixes */

@media (max-width: 768px) {
    /* Make header stack vertically on mobile */
    header {
        flex-direction: column-reverse;
        align-items: center;
        text-align: center;
        gap: 1rem;
    }
    /* Center social links on mobile */
    .social-links-header {
        flex-wrap: wrap;
        justify-content: center;
    }
    /* Disable right-moving hover animations on mobile */
    .publication-item:hover,
    .award-item:hover,
    .service-category:hover,
    .misc-item:hover,
    .news-list li:hover,
    nav a:hover,
    .social-links-header a:hover,
    .pub-links a:hover {
        transform: none !important;
    }
}


/* Define our color themes */

:root {
    --bg-color: #ffffff;
    --text-color: #333333;
}

body.reading-theme {
    --bg-color: #e8f5e9;
    /* Soft Mint Green */
    --text-color: #1b5e20;
    /* Deep Forest Green for text */
}

body.dark-theme {
    --bg-color: #1a1a1a;
    /* Dark Slate */
    --text-color: #e0e0e0;
    /* Off-white text */
}


/* Apply variables to the body */

body {
    background-color: var(--bg-color) !important;
    color: var(--text-color) !important;
    transition: background-color 0.3s ease, color 0.3s ease;
}


/* Style the floating button */

#theme-cycle-btn {
    position: fixed;
    bottom: 25px;
    right: 25px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: #4a4a4a;
    color: white;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 9999;
    font-size: 1.2rem;
}