:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --border: #30363d;
    --success: #3fb950;
    --warning: #f0883e;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --accent: #0969da;
    --accent-hover: #0550ae;
    --border: #d0d7de;
    --success: #1a7f37;
    --warning: #bf8700;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap');

body {
    font-family: 'JetBrains Mono', 'Courier New', 'Consolas', 'Monaco', monospace;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: -0.02em;
}

.container {
    max-width: min(1400px, 85%);
    width: 100%;
    margin: 0 auto;
    padding: 20px;
}

/* Integrated theme toggle button style inside nav */
.theme-toggle {
    all: unset;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 8px;
    font-size: 16px;
    color: var(--text-secondary);
    background: none;
    transition: color 0.15s, border-color 0.15s, background-color 0.15s;
}

.theme-toggle:hover,
.theme-toggle:focus {
    color: var(--accent);
    border-color: var(--accent);
    background-color: var(--bg-secondary);
    outline: none;
}

.hero {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 30px;
    padding: 30px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    flex-wrap: wrap;
}

.profile-image {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: 3px solid var(--border);
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
    background: linear-gradient(135deg, var(--accent) 0%, var(--success) 100%);
}

.profile-info {
    flex: 1;
    min-width: 300px;
}

h1 {
    color: var(--text-primary);
    font-size: 2.5rem;
    margin-bottom: 8px;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.title {
    color: var(--accent);
    font-size: 1.25rem;
    margin-bottom: 12px;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.affiliations {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 15px;
    line-height: 1.8;
    font-weight: 400;
}

.research-focus {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

nav {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 30px;
    padding: 15px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
}

nav a {
    color: var(--accent);
    text-decoration: none;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 4px;
    transition: all 0.2s;
    cursor: pointer;
    font-size: 13px;
}

nav a:hover {
    background-color: var(--bg-primary);
    border-color: var(--accent);
    color: var(--accent-hover);
}

/* Remove the $ sign from navigation */
nav a::before {
    content: none !important;
}

section {
    margin-bottom: 30px;
    padding: 25px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
}

h2 {
    color: var(--text-primary);
    font-size: 20px;
    margin-bottom: 18px;
    font-weight: 600;
    border-bottom: 2px solid var(--border);
    padding-bottom: 10px;
}

/* Refined navigation bar */
.main-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
    margin-bottom: 30px;
}

.nav-container {
    max-width: min(1400px, 85%);
    margin: 0 auto;
    display: flex;
    gap: 8px;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
}

.main-nav a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 8px;
    background: none;
    position: relative;
    transition: color 0.15s, background-color 0.15s, border-color 0.15s;
}

.main-nav a:hover,
.main-nav a:focus {
    color: var(--accent);
    border-color: var(--accent);
    background-color: var(--bg-secondary);
    outline: none;
}

.main-nav a i {
    font-size: 16px;
}

.main-nav a.active {
    color: var(--text-primary);
    border-color: var(--accent);
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    left: 8px;
    right: 8px;
    bottom: 4px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

a,
a:visited,
a:active,
a:focus {
    color: var(--accent) !important;
    text-decoration: underline;
    border-bottom: none;
}

.contact-links a {
    color: var(--accent) !important;
    border-bottom: none;
}

.contact-links a:hover {
    color: var(--accent-hover) !important;
}

.affiliations a {
    color: var(--accent) !important;
    border-bottom: none;
}

.affiliations a:hover {
    color: var(--accent-hover) !important;
}

.research-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.tag {
    padding: 6px 14px;
    background-color: var(--bg-primary);
    border: 1px solid var(--accent);
    border-radius: 20px;
    font-size: 12px;
    color: var(--accent);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.news-list .news-item {
    display: flex !important;
    gap: 20px;
    align-items: flex-start;
    padding: 15px;
    background-color: var(--bg-primary);
    border-left: 3px solid var(--accent);
    border-radius: 4px;
}

.news-item .date {
    color: var(--text-secondary);
    font-size: 11px;
    margin-bottom: 6px;
    text-transform: uppercase;
}

.news-item .title {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 14px;
}

.news-item .description {
    color: var(--text-secondary);
    font-size: 13px;
}

.news-item.publication {
    border-left-color: var(--warning);
}

.more-link {
    display: inline-block;
    margin-top: 15px;
    color: var(--accent);
    font-weight: 600;
    border: none;
}

.publications-grid {
    display: grid;
    gap: 20px;
}

.pub-item {
    padding: 18px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: all 0.2s;
}

.pub-item:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.pub-title {
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
}

.pub-authors {
    color: var(--text-primary);
    font-size: 12px;
    margin-bottom: 6px;
}

.pub-venue {
    color: var(--text-primary);
    font-size: 13px;
    margin-bottom: 8px;
}

.pub-meta {
    display: flex;
    gap: 15px;
    font-size: 11px;
    color: var(--text-secondary);
}

.email-container {
    margin: 15px 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.email-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--bg-primary);
    padding: 10px 15px;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.email-item i {
    color: var(--text-secondary);
    font-size: 16px;
}

.email-link {
    flex: 1;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    border-bottom: none;
    font-size: 14px;
}

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

.email-link .link-icon {
    font-size: 12px;
    opacity: 0.7;
}

.copy-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px;
    border-radius: 4px;
    transition: all 0.2s;
}

.copy-btn:hover {
    color: var(--accent);
    background-color: var(--bg-secondary);
}

.copy-btn i {
    font-size: 14px;
}

.address {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.address-line {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 8px;
    line-height: 1.4;
}

.address-line i {
    width: 16px;
    margin-top: 4px;
    color: var(--text-secondary);
}

.address-indent {
    padding-left: 26px;
}

.contact-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 15px;
}

.contact-links a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    border-bottom: 1px solid var(--border);
    transition: all 0.2s;
}

.contact-links a:hover {
    border-color: var(--accent);
    background-color: var(--bg-secondary);
}

/* ResearchGate blue accent style */
.contact-links .fa-researchgate {
    color: var(--accent);
    font-size: 1.35em;
    background: rgba(88, 166, 255, 0.08);
    border-radius: 4px;
    padding: 2px 4px;
    transition: color 0.2s, background 0.2s;
}

.contact-links a:hover .fa-researchgate {
    color: var(--accent-hover);
    background: rgba(88, 166, 255, 0.18);
}

/* News Items with Media */
.news-list .news-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 15px;
    background-color: var(--bg-primary);
    border-left: 3px solid var(--accent);
    border-radius: 4px;
}

.news-media-container {
    flex-shrink: 0;
    width: 150px;
    height: 100px;
    position: relative;
    border-radius: 6px;
    overflow: hidden;
    background-color: var(--bg-secondary);
}

.news-media {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 36px;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
    pointer-events: none;
}

.news-content {
    flex: 1;
    min-width: 0;
}

/* Publications with Media */
.publications-grid .pub-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 18px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: all 0.2s;
}

.pub-media-container {
    flex-shrink: 0;
    width: 200px;
    height: 150px;
    position: relative;
    border-radius: 6px;
    overflow: hidden;
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
}

.pub-media-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pub-media {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pub-placeholder-icon {
    font-size: 48px;
    opacity: 0.3;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 48px;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
    pointer-events: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.pub-media-container:hover .play-button {
    opacity: 1;
}

.pub-content {
    flex: 1;
    min-width: 0;
}

footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
}

strong {
    color: var(--accent);
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
        padding-top: 100px;
        /* space for fixed nav */
        max-width: 100%;
        width: 100%;
        margin: 0;
    }

    .main-nav {
        padding: 6px 0;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        border-bottom: 1px solid var(--border);
    }

    .nav-container {
        max-width: 100%;
        padding: 0 10px;
    }

    .main-nav a,
    .theme-toggle {
        padding: 8px 10px;
        font-size: 13px;
        gap: 6px;
        line-height: 1.1;
    }

    .main-nav a i {
        font-size: 18px;
    }

    /* No bottom nav now, so no extra bottom padding needed */

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 20px;
        gap: 20px;
    }

    .profile-image {
        width: 140px;
        height: 140px;
    }

    .profile-info {
        min-width: 0;
        width: 100%;
    }

    h1 {
        font-size: 26px;
    }

    .title {
        font-size: 16px;
    }

    .affiliations {
        font-size: 13px;
        word-wrap: break-word;
    }

    nav {
        justify-content: center;
        gap: 10px;
        flex-wrap: wrap;
    }

    nav a {
        font-size: 12px;
        padding: 6px 10px;
        width: auto;
        text-align: center;
        white-space: nowrap;
    }

    /* Mobile adjustments for news and publications */
    .news-list .news-item {
        flex-direction: column;
    }

    .news-media-container {
        width: 100%;
        height: 150px;
    }

    .publications-grid .pub-item {
        flex-direction: column;
        gap: 15px;
    }

    .pub-media-container {
        width: 100%;
        height: 200px;
        margin-bottom: 10px;
    }

    .pub-media-container video {
        width: 100%;
        height: 100%;
        object-fit: contain;
    }

    .pub-content {
        padding: 10px 0;
    }

    .pub-title {
        font-size: 14px;
    }

    .pub-authors {
        font-size: 12px;
    }

    /* Improve spacing on mobile */
    section {
        padding: 15px;
        margin-bottom: 20px;
    }

    .contact-links {
        justify-content: center;
        gap: 10px;
    }

    .contact-links a {
        padding: 6px 12px;
        font-size: 13px;
        flex: 1 1 auto;
        min-width: calc(50% - 10px);
        max-width: 100%;
        text-align: center;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .email-container {
        width: 100%;
    }

    .email-item {
        flex-direction: row;
        align-items: center;
        padding: 8px;
    }

    .email-link {
        font-size: 13px;
        word-break: break-all;
    }

    .research-focus {
        font-size: 13px;
        word-wrap: break-word;
    }

    /* Adjust text size for better mobile readability */
    p {
        font-size: 13px;
        word-wrap: break-word;
    }

    .news-item .title {
        font-size: 14px;
    }

    .news-item .description {
        font-size: 12px;
        word-wrap: break-word;
    }

    /* Fix container widths */
    main {
        width: 100%;
        overflow-x: hidden;
    }

    section {
        width: 100%;
        box-sizing: border-box;
        overflow-x: hidden;
    }
}

/* Ensure proper text wrapping for all text content */
@media (max-width: 600px) {

    /* shrink nav spacing mid range */
    .nav-container {
        gap: 8px;
    }

    .main-nav a {
        font-size: 12px;
        padding: 6px 8px;
    }
}

@media (max-width: 480px) {
    .container {
        padding-top: 90px;
    }

    .main-nav a span {
        display: none;
    }

    .main-nav a,
    .theme-toggle {
        padding: 12px;
        min-width: 48px;
        justify-content: center;
        border-radius: 10px;
    }

    .main-nav a i,
    .theme-toggle #theme-icon {
        font-size: 20px;
    }

    .main-nav .nav-container {
        justify-content: space-around;
    }
}

/* Remove any custom blue color usage */

/* Remove inline or hardcoded blue for .more-link, .external-links, .tag, .news-item, .pub-meta, etc. */
.more-link,
.external-links a,
.tag,
.news-item .title,
.pub-meta a,
.pub-meta span,
.pub-title,
.pub-authors,
.pub-venue {
    color: var(--text-primary) !important;
    border-bottom: none;
}

.more-link:hover,
.external-links a:hover,
.tag:hover,
.news-item .title:hover,
.pub-meta a:hover,
.pub-links a:hover {
    color: var(--accent-hover) !important;
}

/* Remove any blue color from icons */
.contact-links .fa-researchgate,
.contact-links .fa-github,
contact-links .fa-linkedin,
contact-links .fa-x-twitter,
contact-links .fa-graduation-cap {
    color: var(--accent) !important;
}

.contact-links a:hover .fa-researchgate,
.contact-links a:hover .fa-github,
contact-links a:hover .fa-linkedin,
contact-links a:hover .fa-x-twitter,
contact-links a:hover .fa-graduation-cap {
    color: var(--accent-hover) !important;
}