styles.css

/* SEAT-Lab Website Styles */

:root {
    --primary-color: #8e6f3e;
    --secondary-color: #1a1a1a;
    --accent-color: #daaa00;
    --gold-field: #ddb945;
    --gold-dust: #ebd99f;
    --steel: #555960;
    --cool-gray: #6f727b;
    --railway-gray: #9d9795;
    --steam: #c4bfc0;
    --text-primary: #1a1a1a;
    --text-secondary: #555960;
    --text-light: #6f727b;
    --background: #faf9f7;
    --background-alt: #f3f0ea;
    --border-color: #d4cfc8;
    --success-color: #8e6f3e;
    --warning-color: #daaa00;
    --shadow-sm: 0 1px 2px 0 rgba(26, 26, 26, 0.04);
    --shadow: 0 1px 3px 0 rgba(26, 26, 26, 0.06), 0 1px 2px 0 rgba(26, 26, 26, 0.04);
    --shadow-md: 0 4px 12px -2px rgba(26, 26, 26, 0.08);
    --shadow-lg: 0 10px 20px -4px rgba(26, 26, 26, 0.1);
    --shadow-xl: 0 16px 28px -6px rgba(26, 26, 26, 0.12);
    --border-radius: 6px;
    --border-radius-lg: 10px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --font-display: 'Source Serif 4', Georgia, 'Times New Roman', serif;
    --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Skip link — hidden until focused by keyboard */
.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    z-index: 1000;
    padding: 0.6rem 1rem;
    background: var(--secondary-color);
    color: #fff;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus {
    top: 0.75rem;
}

main:focus {
    outline: none;
}

body {
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--background);
    overflow-x: hidden;
    padding-top: 60px;
    background-image:
        linear-gradient(180deg, rgba(142, 111, 62, 0.04) 0%, transparent 28%),
        radial-gradient(ellipse at 12% 18%, rgba(221, 185, 69, 0.08) 0%, transparent 42%),
        radial-gradient(ellipse at 88% 72%, rgba(142, 111, 62, 0.05) 0%, transparent 48%);
    background-attachment: fixed;
}

/* Header Styles */
header {
    position: relative;
    background:
        linear-gradient(160deg, rgba(142, 111, 62, 0.92) 0%, rgba(26, 26, 26, 0.94) 58%, #111 100%),
        linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-align: center;
    padding: 5rem 1.5rem 2.5rem;
    margin-top: -60px;
    z-index: 10;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(235, 217, 159, 0.18) 0%, transparent 45%),
        radial-gradient(ellipse at 80% 90%, rgba(218, 170, 0, 0.12) 0%, transparent 40%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="12" height="12" patternUnits="userSpaceOnUse"><path d="M 12 0 L 0 0 0 12" fill="none" stroke="rgba(255,255,255,0.07)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    z-index: 0;
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 2;
    max-width: 760px;
    margin: 0 auto;
}

.hero-text h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 3.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
    margin-bottom: 0.75rem;
    animation: fadeInDown 0.8s ease-out;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subtitle {
    font-family: var(--font-body);
    font-size: clamp(1.05rem, 2.2vw, 1.35rem);
    font-weight: 400;
    line-height: 1.45;
    margin-bottom: 0.35rem;
    opacity: 0.95;
    letter-spacing: 0.01em;
    animation: fadeInUp 0.8s ease-out 0.15s both;
}

.subtitle-secondary {
    font-size: 1rem;
    font-weight: 400;
    margin-bottom: 1.75rem;
    opacity: 0.78;
    animation: fadeInUp 0.8s ease-out 0.25s both;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1.75rem;
    animation: fadeInUp 0.8s ease-out 0.35s both;
}

.hero-actions .contact-link {
    margin: 0;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: white;
    text-decoration: none;
    padding: 0.45rem 0.9rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.9rem;
}

.contact-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Navigation */
nav {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    z-index: 100;
    padding: 0.5rem 0;
    width: 100%;
    left: 0;
    height: 60px;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
}

.nav-links {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 0;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-family: var(--font-body);
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: var(--transition);
    font-size: 0.92rem;
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 1px;
}

/* Hamburger Menu */
.hamburger-menu {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 110;
    position: absolute;
    left: 1rem;
}

.bar {
    display: block;
    width: 24px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-primary);
    transition: var(--transition);
    border-radius: 2px;
}

.mobile-home-icon {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    position: absolute;
    right: 1rem;
    color: var(--text-primary);
    font-size: 1.2rem;
    text-decoration: none;
}

.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 90;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

/* Main Content */
main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2.25rem 1.5rem 3rem;
    position: relative;
    z-index: 20;
}

@media (max-width: 768px) {main {
        padding: 1.5rem 1rem 2rem;
    }
}

.content-section {
    margin-bottom: 2.75rem;
    scroll-margin-top: 80px;
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
}

@media (max-width: 768px) {.content-section {
        margin-bottom: 2rem;
    }
}

.content-section:nth-child(1) { animation-delay: 0.1s; }

.content-section:nth-child(2) { animation-delay: 0.2s; }

.content-section:nth-child(3) { animation-delay: 0.3s; }

.content-section:nth-child(4) { animation-delay: 0.4s; }

.content-section:nth-child(5) { animation-delay: 0.5s; }

.content-section:nth-child(6) { animation-delay: 0.6s; }

/* Modern Section Dividers */
.content-section::before {
    content: '';
    position: absolute;
    top: -1.25rem;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    border-radius: 1px;
    opacity: 0.35;
}

.content-section:first-child::before {
    display: none;
}

.content-section h2 {
    font-family: var(--font-display);
    font-size: clamp(1.45rem, 2.8vw, 1.85rem);
    color: var(--text-primary);
    margin-bottom: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.015em;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    position: relative;
    padding-bottom: 0.55rem;
    border-bottom: 2px solid var(--primary-color);
    width: fit-content;
    max-width: 100%;
}

.content-section h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 48px;
    height: 2px;
    background: var(--accent-color);
    border-radius: 1px;
}

/* Section Header with inline buttons */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    gap: 1rem;
}

.section-header h2 {
    margin-bottom: 0;
    flex: 1;
}

.section-header-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-decoration: none;
    padding: 0.45rem 0.85rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.82rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.section-header-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.section-header-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.section-header-btn:hover::before {
    left: 100%;
}

.collapse-all-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--background-alt);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 0.6rem 1rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.collapse-all-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-1px);
}

.collapse-all-btn i {
    font-size: 0.9rem;
}

.content-section h2 i {
    color: var(--primary-color);
    font-size: 1.15em;
    opacity: 0.9;
}

/* Staggered animation delays for cards */
.person-card:nth-child(1) { transition-delay: 0.1s; }

.person-card:nth-child(2) { transition-delay: 0.2s; }

.person-card:nth-child(3) { transition-delay: 0.3s; }

.person-card:nth-child(4) { transition-delay: 0.4s; }

.project-card:nth-child(1) { transition-delay: 0.1s; }

.project-card:nth-child(2) { transition-delay: 0.2s; }

.publication-highlight-card:nth-child(1) { transition-delay: 0.1s; }

.publication-highlight-card:nth-child(2) { transition-delay: 0.2s; }

.publication-highlight-card:nth-child(3) { transition-delay: 0.3s; }

.publication-highlight-card:nth-child(4) { transition-delay: 0.4s; }

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.85rem;
}

.skills-grid .skill-category:nth-child(1),
.skills-grid .skill-category:nth-child(2),
.skills-grid .skill-category:nth-child(3) {
    grid-column: auto;
    transform: none;
}

@media (max-width: 968px) {.skills-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid .skill-category:nth-child(n) {
        grid-column: auto;
        transform: none;
    }
}

.skill-category {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.05rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border-left: 2px solid var(--primary-color);
    overflow: hidden;
}

.skill-category::after {
    display: none;
}

.skill-category:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.skill-category h3 {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.55rem;
}

.skill-category h3 i {
    color: var(--primary-color);
    font-size: 0.85rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
}

.skill-tag {
    background: var(--background-alt);
    color: var(--text-secondary);
    padding: 0.2rem 0.45rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    line-height: 1.25;
}

.skill-tag.primary {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.skill-tag:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Project Cards Collapsible Functionality */
.project-collapsible-header {
    cursor: pointer;
    position: relative;
    transition: var(--transition);
    display: block;
    width: 100%;
}

.project-collapsible-header .project-header {
    position: relative;
    padding-right: 2rem; /* Space for chevron button */
    cursor: pointer;
}

.project-collapsible-header .project-header h3 {
    margin-right: 1rem;
    cursor: pointer;
}

.project-collapsible-header .project-type {
    cursor: pointer;
}

.project-collapse-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
    padding: 0;
    border-radius: 4px;
    transition: var(--transition);
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    box-shadow: none;
    pointer-events: auto;
}

.project-collapse-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-50%);
    box-shadow: none;
}

.project-collapse-btn:hover i {
    color: white;
    text-shadow: none;
}

.project-collapse-btn:active {
    transform: translateY(-50%);
    box-shadow: none;
}

.project-collapse-btn i {
    transition: transform 0.2s ease;
}

.project-details {
    overflow: hidden;
    transition: all 0.3s ease;
}

/* Only hide project details when collapsed */
.project-card.collapsed .project-details {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    margin-bottom: 0;
    overflow: hidden;
}

.project-card.collapsed .project-collapse-btn {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
    animation: pulse-glow 2s infinite;
}

.project-card.collapsed .project-collapse-btn i {
    transform: rotate(180deg);
    color: white;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}

/* Mobile-first approach: collapsed by default on mobile */
@media (max-width: 768px) {.project-card .project-details {
        max-height: 0;
        opacity: 0;
        margin-top: 0;
        margin-bottom: 0;
        overflow: hidden;
    }

    .project-card.expanded .project-details {
        max-height: 2000px;
        opacity: 1;
        margin-top: 0.5rem;
        margin-bottom: 0;
    }

    /* Only highlight chevron when collapsed (default state on mobile) */
    .project-card .project-collapse-btn {
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        color: white;
        border-color: var(--primary-color);
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
        animation: pulse-glow 2s infinite;
    }

    .project-card .project-collapse-btn i {
        transform: rotate(180deg);
        color: white;
        text-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
    }

    /* Reset chevron styling when expanded */
    .project-card.expanded .project-collapse-btn {
        background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
        color: var(--text-secondary);
        border-color: var(--border-color);
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        animation: none;
    }

    .project-card.expanded .project-collapse-btn i {
        transform: rotate(0deg);
        color: var(--text-secondary);
        text-shadow: none;
    }
}

/* Desktop: expanded by default */
@media (min-width: 769px) {.project-card .project-details {
        max-height: none;
        opacity: 1;
    }

    .project-card.collapsed .project-details {
        max-height: 0;
        opacity: 0;
        overflow: hidden;
    }

    /* Ensure chevron has normal styling when expanded (default on desktop) */
    .project-card .project-collapse-btn {
        background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
        color: var(--text-secondary);
        border-color: var(--border-color);
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        animation: none;
    }

    .project-card .project-collapse-btn i {
        color: var(--text-secondary);
        text-shadow: none;
    }

    .project-header {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: flex-start;
    }

    .project-collapsible-header .project-header {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: flex-start;
    }
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.projects-grid .project-card:nth-child(odd),
.projects-grid .project-card:nth-child(even) {
    grid-column: auto;
    transform: none;
}

@media (max-width: 968px) {.projects-grid {
        grid-template-columns: 1fr;
    }

    .projects-grid .project-card:nth-child(n) {
        grid-column: auto;
        transform: none;
    }
}

.project-card {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.1rem 1.15rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border-top: 2px solid var(--primary-color);
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.project-header {
    display: flex;
    flex-wrap: wrap;
    align-items: start;
    gap: 0.5rem;
    margin-bottom: 0.55rem;
}

.project-header h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1 1 220px;
    max-width: 100%;
    line-height: 1.3;
    overflow-wrap: break-word;
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 0.65rem;
    line-height: 1.55;
    font-size: 0.9rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
}

.tech-tag {
    background: var(--background-alt);
    color: var(--text-secondary);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.72rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.tech-tag.lab {
    background: linear-gradient(135deg, var(--accent-color), var(--gold-field));
    color: var(--secondary-color);
    border-color: var(--accent-color);
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(218, 170, 0, 0.3);
}

/* Contact Section */
.contact-primary-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 0.85rem;
    margin-bottom: 0.85rem;
}

.contact-main-card {
    grid-column: auto;
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border-top: 2px solid var(--primary-color);
    overflow: hidden;
}

.contact-main-card::before {
    display: none;
}

.contact-main-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.contact-links-card {
    grid-column: auto;
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border-top: 2px solid var(--primary-color);
    transform: none;
}

.contact-links-card::after {
    display: none;
}

.contact-links-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.contact-card-header {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    margin-bottom: 0.7rem;
    padding-bottom: 0.45rem;
    border-bottom: 1px solid var(--border-color);
}

.contact-card-header i {
    color: var(--primary-color);
    font-size: 0.95rem;
}

.contact-card-header h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.contact-main-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.contact-person h4 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.contact-role {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0;
    line-height: 1.4;
}

.contact-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.contact-action-btn {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 0.15rem;
    padding: 0.55rem 0.7rem;
    background: var(--background-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: var(--transition);
    text-align: left;
}

.contact-action-btn i {
    font-size: 0.95rem;
    color: var(--primary-color);
    margin-bottom: 0;
}

.contact-action-btn span {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.85rem;
}

.contact-action-btn small {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0;
    overflow-wrap: anywhere;
}

.contact-action-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.contact-action-btn:hover i,
.contact-action-btn:hover span {
    color: white;
}

.contact-action-btn:hover small {
    color: rgba(255, 255, 255, 0.9);
}

.contact-action-btn.primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: var(--primary-color);
    color: white;
}

.contact-action-btn.primary i,
.contact-action-btn.primary span {
    color: white;
}

.contact-action-btn.primary small {
    color: rgba(255, 255, 255, 0.9);
}

.contact-action-btn.primary:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-1px);
}

.contact-links-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.45rem;
}

.contact-link-item {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.5rem 0.6rem;
    background: var(--background-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: var(--transition);
    border-left: 2px solid transparent;
}

.contact-link-item i {
    font-size: 1rem;
    color: var(--primary-color);
    width: 1.1rem;
    text-align: center;
    flex-shrink: 0;
}

.contact-link-item div {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.contact-link-item strong {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.88rem;
}

.contact-link-item span {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.contact-link-item:hover {
    background: var(--background);
    border-left-color: var(--primary-color);
    transform: translateX(6px);
    box-shadow: var(--shadow-sm);
}

/* Footer */
footer {
    background: var(--text-primary);
    color: white;
    margin-top: 1rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 3rem;
    align-items: start;
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: white;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-section h4::before {
    content: '';
    width: 3px;
    height: 16px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 0.5rem;
    line-height: 1.4;
    font-size: 0.9rem;
}

.footer-section p i {
    width: 16px;
    margin-right: 0.5rem;
    opacity: 0.7;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0;
}

.footer-section ul li a:hover {
    color: var(--accent-color);
    transform: translateX(2px);
}

.footer-contact {
    grid-column: 1 / -1;
    text-align: center;
}

.footer-contact h4 {
    text-align: center;
    margin-bottom: 0.75rem;
    justify-content: center;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    text-align: left;
}

.footer-info {
    text-align: left;
}

.footer-info h4 {
    margin: 0 0 0.5rem 0;
    padding: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    text-align: left;
}

.footer-title {
    margin: 0 0 0.75rem 0;
    padding: 0;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    font-style: italic;
    text-align: center;
}

.footer-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: flex-start;
}

.social-links {
    display: flex;
    flex-direction: row;
    gap: 0.75rem;
    align-items: flex-start;
    justify-content: flex-end;
}

.social-links a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-size: 0.85rem;
    font-weight: 500;
    min-width: 120px;
    justify-content: flex-start;
}

.social-links a i {
    font-size: 1rem;
    width: 16px;
    flex-shrink: 0;
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-1px);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--primary-color);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

/* Progress Bar */
.progress-container {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 3px;
    background: transparent;
    z-index: 101;
}

.progress-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    transition: width 0.1s ease;
}

/* Responsive Design */
@media (max-width: 768px) {body {
        padding-top: 60px;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hamburger-menu,
.mobile-home-icon {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 0;
        left: -100%;
        flex-direction: column;
        background: white;
        height: 100vh;
        width: 280px;
        padding: 80px 20px 20px;
        box-shadow: var(--shadow-xl);
        transition: left 0.3s ease;
        z-index: 100;
        gap: 0;
    }

    .nav-links li {
        width: 100%;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links a {
        display: block;
        padding: 0.5rem 0;
        font-size: 1.1rem;
    }

    body.menu-open .nav-links {
        left: 0;
    }

    body.menu-open .nav-overlay {
        opacity: 1;
        visibility: visible;
    }

    body.menu-open .hamburger-menu .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    body.menu-open .hamburger-menu .bar:nth-child(2) {
        opacity: 0;
    }

    body.menu-open .hamburger-menu .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

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

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

    .project-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .project-header h3 {
        flex: none; /* Reset flex on mobile */
        max-width: none; /* Reset max-width */
    }

    main {
        padding: 1rem;
    }

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

    .footer-content {
        padding: 2rem 1rem;
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .footer-left {
        gap: 1.5rem;
        text-align: center;
    }

    .footer-info h4 {
        text-align: center;
    }

    .social-links {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
        gap: 1rem;
        align-items: center;
    }

    .social-links a {
        padding: 0.75rem;
        flex-direction: column;
        gap: 0.25rem;
        min-width: auto;
    }

    .social-links a span {
        font-size: 0.75rem;
    }

    .footer-right {
        align-items: center;
    }
}

@media (max-width: 480px) {.hero-text h1 {
        font-size: 2.25rem;
    }

    .subtitle {
        font-size: 1.05rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-actions .contact-link {
        justify-content: center;
        width: 100%;
    }

    .contact-link {
        width: 100%;
        justify-content: center;
    }

    .content-section h2 {
        font-size: 1.75rem;
    }

    .skills-grid,
.projects-grid {
        grid-template-columns: 1fr;
    }

    .skill-category,
.project-card {
        padding: 1rem;
    }

    .collapse-all-btn {
        padding: 0.5rem;
        font-size: 0.75rem;
    }

    .collapse-all-btn i {
        margin: 0;
    }

    .collaborator-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Print Styles */
@media print {body {
        padding-top: 0;
        background: white;
        color: black;
    }

    nav,
.back-to-top,
.progress-container {
        display: none;
    }

    header {
        background: none;
        color: black;
        padding: 2rem 0;
        margin-top: 0;
    }

    .contact-link {
        background: none;
        border: 1px solid #ccc;
        color: black;
    }

    .content-section {
        page-break-inside: avoid;
        margin-bottom: 1rem;
    }

    .project-card {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
        transform: translateY(-50%) scale(1);
    }
    50% {
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
        transform: translateY(-50%) scale(1.05);
    }
}

/* Page Header Styles */
.page-header {
    position: relative;
    background:
        linear-gradient(160deg, rgba(142, 111, 62, 0.92) 0%, rgba(26, 26, 26, 0.94) 58%, #111 100%),
        linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-align: center;
    padding: 4.5rem 1.5rem 2.25rem;
    margin-top: -60px;
    z-index: 10;
    overflow: hidden;
}

.page-header .header-content {
    position: relative;
    z-index: 2;
}

.page-header .hero-text h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.page-header .subtitle {
    font-size: 1.15rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    opacity: 0.95;
}

.page-header .subtitle-secondary {
    font-size: 1rem;
    font-weight: 400;
    opacity: 0.8;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(235, 217, 159, 0.16) 0%, transparent 45%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="12" height="12" patternUnits="userSpaceOnUse"><path d="M 12 0 L 0 0 0 12" fill="none" stroke="rgba(255,255,255,0.07)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    z-index: 0;
    pointer-events: none;
}

/* Overview Cards */

.overview-card {
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    border-left: 3px solid var(--primary-color);
    overflow: hidden;
    backdrop-filter: blur(6px);
}

.overview-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s ease;
}

.overview-card:hover::after {
    transform: scaleY(1);
}

.overview-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.overview-card.full-width {
    width: 100%;
    max-width: none;
    background: transparent;
    border: none;
    border-left: none;
    box-shadow: none;
    padding: 0.25rem 0 0;
    backdrop-filter: none;
}

.overview-card.full-width:hover {
    transform: none;
    box-shadow: none;
    border-color: transparent;
}

.overview-card.full-width::after {
    display: none;
}

.overview-card.full-width p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 46rem;
}

.overview-card.full-width p:first-child {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 2.4vw, 1.4rem);
    font-weight: 500;
    line-height: 1.65;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.overview-card h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.overview-card h3 i {
    color: var(--primary-color);
}

/* Project Page Enhancements */
.project-card.featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

/* Desktop adjustments */

.project-details {
    margin: 0.75rem 0;
}

.project-details h4 {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-display);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0.65rem 0 0.35rem 0;
}

.project-details h4 i {
    color: var(--primary-color);
    font-size: 0.85rem;
}

.project-details ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.project-details li {
    position: relative;
    padding-left: 1.1rem;
    margin-bottom: 0.3rem;
    color: var(--text-secondary);
    line-height: 1.45;
    font-size: 0.88rem;
}

.project-details li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Project Links Styles */
.project-links {
    margin-top: 0.55rem;
    padding-top: 0.55rem;
    border-top: 1px solid var(--border-color);
}

.project-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-decoration: none;
    padding: 0.4rem 0.75rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.8rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.project-link-btn::before {
    display: none;
}

.project-link-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.project-link-btn i {
    font-size: 0.85rem;
}

/* Desktop Layout - Simple Grid */
@media (min-width: 1024px) {/* Keep consistent aspect ratio for desktop */
}

/* People section styles */
.people-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    align-items: stretch;
}

.people-grid .faculty-card,
.people-grid .collapsible-card {
    grid-column: 1 / -1;
}

.people-grid .person-card:nth-child(1),
.people-grid .person-card:nth-child(2),
.people-grid .person-card:nth-child(3),
.people-grid .person-card:nth-child(4) {
    grid-row: auto;
    transform: none;
}

.person-card {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.1rem 1.15rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
    border-top: 2px solid var(--primary-color);
}

.person-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.person-card:hover::before {
    transform: scaleX(1);
}

/* Responsive adjustments for people grid */
@media (max-width: 968px) {.people-grid {
        grid-template-columns: 1fr 1fr;
    }

    .people-grid .person-card:nth-child(n) {
        grid-column: auto;
        transform: none;
    }
}

@media (max-width: 640px) {.people-grid {
        grid-template-columns: 1fr;
    }
}

.person-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.person-info {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.person-info h3 {
    color: var(--primary-color);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.65rem;
}

.faculty-layout {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.faculty-layout .person-description {
    margin-bottom: 0;
}

.faculty-identity .person-links {
    margin-top: 0.45rem;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.35rem;
}

.faculty-identity .person-link {
    justify-content: center;
}

@media (min-width: 769px) {
    .faculty-layout {
        display: grid;
        grid-template-columns: minmax(16rem, 0.38fr) 1fr;
        gap: 0.5rem 1.75rem;
        align-items: start;
    }

    .faculty-layout .person-description {
        margin-top: 0.15rem;
    }
}

.person-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.65rem;
    cursor: pointer;
}

.person-card-header h3 {
    margin-bottom: 0;
}

.collapsible-card:not(.collapsed) .person-card-header {
    margin-bottom: 0.65rem;
}

.person-card-toggle {
    display: inline-flex !important;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
    padding: 0;
    border-radius: 4px;
    transition: var(--transition);
    width: 1.5rem;
    height: 1.5rem;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.person-card-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.person-card-toggle i {
    transition: transform 0.2s ease;
}

.collapsible-card .researcher-list {
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.2s ease;
}

.collapsible-card.collapsed .researcher-list {
    max-height: 0;
    opacity: 0;
    margin: 0;
    pointer-events: none;
}

.collapsible-card:not(.collapsed) .researcher-list {
    max-height: 200rem;
    opacity: 1;
}

.people-grid .collapsible-card.collapsed {
    padding-top: 0.85rem;
    padding-bottom: 0.85rem;
}

@media (min-width: 969px) {
    .people-grid .collapsible-card:not(.collapsed) .researcher-list {
        display: grid;
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }
}

.collapsible-card:not(.collapsed) .person-card-toggle {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.collapsible-card:not(.collapsed) .person-card-toggle i {
    transform: rotate(180deg);
}

.person-name {
    font-family: var(--font-display);
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.15rem;
    letter-spacing: -0.01em;
    overflow-wrap: anywhere;
}

.person-title {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.person-focus {
    color: var(--text-secondary);
    font-size: 0.84rem;
    font-style: italic;
    margin-bottom: 0.35rem;
    line-height: 1.4;
    overflow-wrap: break-word;
}

.person-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.55;
    margin-bottom: 0.65rem;
}

.researcher-list {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.researcher-item {
    padding: 0.65rem 0.75rem;
    background: var(--background-alt);
    border-radius: var(--border-radius);
    border-left: 2px solid var(--primary-color);
    transition: var(--transition);
    position: relative;
}

.researcher-item::before {
    display: none;
}

.researcher-item:hover {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: none;
    transform: none;
}

/* Researcher dropdown styles */
.researcher-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.65rem;
    cursor: pointer;
}

.researcher-basic-info {
    flex: 1;
    min-width: 0;
}

.researcher-toggle {
    display: inline-flex !important;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
    padding: 0;
    border-radius: 4px;
    transition: var(--transition);
    width: 1.5rem;
    height: 1.5rem;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.researcher-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: none;
}

.researcher-toggle i {
    transition: transform 0.2s ease;
}

.researcher-details {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.25s ease, opacity 0.2s ease, margin-top 0.2s ease;
    margin-top: 0;
}

.researcher-item.expanded .researcher-details {
    max-height: 40rem;
    opacity: 1;
    margin-top: 0.5rem;
}

.researcher-item.expanded .researcher-toggle {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.researcher-item.expanded .researcher-toggle i {
    transform: rotate(180deg);
}

.person-links {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
    margin-top: 0.35rem;
}

.person-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 500;
    padding: 0.2rem 0.45rem;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: var(--transition);
    white-space: nowrap;
}

.person-link:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Publications section styles */

.publication-count {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 400;
    opacity: 0.8;
}

.publication-authors {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
    font-style: italic;
}

.publication-venue {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.publication-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.publication-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    background: var(--background-alt);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.publication-link:hover {
    background: var(--primary-color);
    color: white;
}

/* Featured Publications Grid */
.featured-publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 0.85rem;
    margin-top: 0.35rem;
}

.featured-publications-grid .publication-highlight-card:nth-child(odd),
.featured-publications-grid .publication-highlight-card:nth-child(even),
.featured-publications-grid .publication-highlight-card:nth-child(3n) {
    transform: none;
    grid-column: auto;
    grid-row: auto;
}

@media (min-width: 1200px) {.featured-publications-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .featured-publications-grid .publication-highlight-card:nth-child(1),
.featured-publications-grid .publication-highlight-card:nth-child(4) {
        grid-row: auto;
        grid-column: auto;
    }
}

.publication-highlight-card {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
    border-left: 2px solid var(--primary-color);
}

.publication-highlight-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s ease;
}

.publication-highlight-card:hover::after {
    transform: scaleY(1);
}

.publication-highlight-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.publication-year-badge {
    position: absolute;
    top: 0.65rem;
    right: 0.65rem;
    background: var(--primary-color);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.72rem;
    font-weight: 600;
    z-index: 2;
}

.publication-content {
    padding: 0.85rem 0.9rem;
}

.publication-content h4 {
    font-family: var(--font-display);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    line-height: 1.35;
    letter-spacing: -0.01em;
    padding-right: 3.25rem; /* Space for year badge */
    overflow-wrap: break-word;
}

.publication-content .publication-authors {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
    font-style: italic;
}

.publication-content .publication-venue {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.publication-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.pub-tag {
    background: var(--background-alt);
    color: var(--text-secondary);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.72rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.publication-content .publication-links {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.publication-content .publication-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 500;
    padding: 0.2rem 0.45rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 4px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    white-space: nowrap;
}

.publication-content .publication-link:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Year Sections */
.year-section {
    margin-bottom: 0.55rem;
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.year-header {
    background: var(--background-alt);
    padding: 0.5rem 0.85rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.year-header:hover {
    background: var(--primary-color);
    color: white;
}

.year-header h3 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
}

.toggle-icon {
    transition: transform 0.3s ease;
}

.year-header.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.year-content {
    padding: 0 0.75rem;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    display: block;
    max-height: 10000px;
    overflow: hidden;
    transition: max-height 0.4s ease, padding-top 0.4s ease, padding-bottom 0.4s ease;
}

.year-content > * {
    max-width: 100%;
    box-sizing: border-box;
}

.year-content.collapsed {
    display: none;
}

.year-content .publication-detailed-card {
    margin-top: 0.15rem;
    margin-bottom: 0.15rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--background-alt);
    overflow: hidden;
    width: 100%;
    box-sizing: border-box;
}

.year-content .publication-detailed-card:last-child {
    margin-bottom: 0;
}

.year-content .publication-detailed-card.featured {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(142, 111, 62, 0.05) 0%, rgba(142, 111, 62, 0.02) 100%);
}

.year-content .publication-content {
    padding: 0.5rem;
    overflow-wrap: break-word;
    word-wrap: break-word;
    word-break: break-word;
}

.year-content .publication-content h4 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    line-height: 1.25;
}

.year-content .publication-content h5 {
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 600;
    margin: 0.5rem 0 0.3rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.publication-abstract p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.45;
    margin-bottom: 0.5rem;
    font-style: italic;
}

/* Keyword color coding */
.keyword.acoustics {
    background: rgba(59, 130, 246, 0.1);
    color: #1e40af;
    border-color: rgba(59, 130, 246, 0.3);
}

.keyword.ml {
    background: rgba(16, 185, 129, 0.1);
    color: #047857;
    border-color: rgba(16, 185, 129, 0.3);
}

.keyword.healthcare {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border-color: rgba(239, 68, 68, 0.3);
}

.keyword.microfluidics {
    background: rgba(168, 85, 247, 0.1);
    color: #7c3aed;
    border-color: rgba(168, 85, 247, 0.3);
}

.keyword.sensors {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
    border-color: rgba(245, 158, 11, 0.3);
}

.keyword.robotics {
    background: rgba(236, 72, 153, 0.1);
    color: #be185d;
    border-color: rgba(236, 72, 153, 0.3);
}

/* Medium screens (tablets) */
@media (max-width: 1024px) and (min-width: 769px) {.people-grid {
        gap: 1.25rem;
    }

    .section-header {
        gap: 1rem;
    }

    .section-header-btn {
        font-size: 0.85rem;
        padding: 0.65rem 1.1rem;
    }

    .collapse-all-btn {
        font-size: 0.8rem;
        padding: 0.5rem 0.8rem;
        gap: 0.4rem;
    }
}

/* Collaborators section styles */
.collaborators-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.collaborators-grid .collaborator-category:nth-child(1),
.collaborators-grid .collaborator-category:nth-child(2) {
    grid-column: auto;
    transform: none;
}

@media (max-width: 968px) {.collaborators-grid {
        grid-template-columns: 1fr;
    }

    .collaborators-grid .collaborator-category:nth-child(n) {
        grid-column: auto;
        transform: none;
    }
}

.collaborator-category {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.1rem 1.15rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border-top: 2px solid var(--primary-color);
    overflow: hidden;
}

.collaborator-category::before {
    display: none;
}

.collaborator-category:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.collaborator-category h3 {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-display);
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    padding-bottom: 0.45rem;
    border-bottom: 1px solid var(--border-color);
}

.collaborator-category h3 i {
    color: var(--primary-color);
    font-size: 0.95rem;
}

.collaborator-list {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.collaborator-item {
    padding: 0.65rem 0.75rem;
    background: var(--background-alt);
    border-radius: var(--border-radius);
    border-left: 2px solid var(--primary-color);
    transition: var(--transition);
    position: relative;
}

.collaborator-item::before {
    display: none;
}

.collaborator-item:hover {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: none;
    transform: none;
}

.collaborator-header {
    display: block;
    cursor: default;
}

.collaborator-basic-info {
    min-width: 0;
}

.collaborator-details {
    max-height: none;
    overflow: visible;
    opacity: 1;
    margin-top: 0.35rem;
}

.collaborator-item.expanded .collaborator-details {
    max-height: none;
    opacity: 1;
    margin-top: 0.35rem;
}

.collaborator-item.placeholder {
    border-left-color: var(--accent-color);
    background: linear-gradient(135deg, var(--background-alt) 0%, rgba(218, 170, 0, 0.05) 100%);
}

.collaborator-item.placeholder:hover {
    background: linear-gradient(135deg, var(--background) 0%, rgba(218, 170, 0, 0.1) 100%);
}

.collaborator-basic-info h4 {
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 0.98rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
    overflow-wrap: break-word;
}

.collaborator-department {
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 400;
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.collaborator-focus {
    color: var(--text-secondary);
    font-size: 0.8rem;
    line-height: 1.4;
    margin-bottom: 0.35rem;
}

.collaborator-links {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
    margin-bottom: 0;
}

.collaborator-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 500;
    padding: 0.2rem 0.45rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 4px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    white-space: nowrap;
}

.collaborator-link:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.collaborator-item.placeholder .collaboration-note i {
    color: var(--accent-color);
}

/* Projects Preview Section */
.projects-preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 0.35rem;
}

.projects-preview-grid .project-preview-card:nth-child(1),
.projects-preview-grid .project-preview-card:nth-child(2) {
    grid-column: auto;
    transform: none;
}

@media (max-width: 768px) {.projects-preview-grid {
        grid-template-columns: 1fr;
    }

    .projects-preview-grid .project-preview-card:nth-child(n) {
        grid-column: auto;
        transform: none;
    }
}

.project-preview-card {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.1rem 1.15rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border-top: 2px solid var(--primary-color);
    overflow: hidden;
}

.project-preview-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.project-preview-card:hover::before {
    transform: scaleX(1);
}

.project-preview-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.project-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.45rem;
    gap: 0.75rem;
}

.project-preview-header h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
    line-height: 1.3;
    overflow-wrap: break-word;
}

.project-preview-description {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.55rem;
    font-size: 0.88rem;
}

.project-preview-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
}

/* Section Footer with View More Button */
.section-footer {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* Mobile-only footer - hidden by default */
.section-footer.mobile-only {
    display: none;
}

.view-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.95rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.view-more-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.view-more-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.view-more-btn:hover::before {
    left: 100%;
}

/* Publications Page Styles */

.publication-detailed-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow);
    display: flex;
    gap: 2rem;
    transition: var(--transition);
}

.publication-detailed-card:hover {
    box-shadow: var(--shadow-md);
}

.publication-content {
    flex: 1;
}

.publication-content h3 {
    font-family: var(--font-display);
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.35;
    letter-spacing: -0.01em;
}

.publication-authors {
    margin-bottom: 0.75rem;
}

.author {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.author.highlight {
    color: var(--primary-color);
    font-weight: 600;
}

.publication-venue {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.publication-venue i {
    color: var(--primary-color);
}

.publication-abstract {
    margin-bottom: 0.5rem;
    padding: 0.6rem;
    background: var(--background-alt);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--primary-color);
}

.publication-abstract h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.publication-abstract p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.publication-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.5rem;
}

.keyword {
    background: var(--background-alt);
    color: var(--text-secondary);
    padding: 0.2rem 0.6rem;
    border-radius: 14px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.publication-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.publication-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.9rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.publication-action-btn.primary {
    background: var(--primary-color);
    color: white;
}

.publication-action-btn.primary:hover {
    background: var(--secondary-color);
    transform: translateY(-1px);
}

.publication-action-btn.secondary {
    background: var(--background-alt);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.publication-action-btn.secondary:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.publication-action-btn.success {
    background: var(--success-color);
    color: white;
}

/* Responsive adjustments for lab sections */
@media (max-width: 768px) {.featured-publications-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .publication-highlight-card {
        margin-bottom: 0.5rem;
    }

    .publication-content h4 {
        font-size: 1rem;
        padding-right: 3.5rem;
    }

    .year-content {
        padding: 0 0.5rem;
        padding-top: 0.5rem;
        padding-bottom: 0.5rem;
    }

    .year-content .publication-detailed-card {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }

    .year-content .publication-content {
        padding: 0.4rem;
        max-width: 100%;
    }

    .publication-year-badge {
        top: 0.75rem;
        right: 0.75rem;
        padding: 0.4rem 0.6rem;
        font-size: 0.75rem;
    }

    .people-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        gap: 1rem;
    }

    .collaborators-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .projects-preview-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .publication-detailed-card {
        flex-direction: column;
        gap: 0.7rem;
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        margin-bottom: 2rem;
    }

    .section-header h2 {
        text-align: center;
        margin-bottom: 0;
    }

    /* Hide header buttons on mobile */
    .section-header-btn {
        display: none;
    }

    /* Show mobile-only footer buttons */
    .section-footer.mobile-only {
        display: flex;
    }

    /* Reset grid positioning on mobile */
    .person-card:nth-child(1),
.person-card:nth-child(2),
.person-card:nth-child(3),
.person-card:nth-child(4) {
        grid-column: auto;
        grid-row: auto;
    }

    /* Mobile adjustments for researcher dropdowns */
    .researcher-header {
        align-items: center;
        gap: 0.75rem;
    }

    .researcher-toggle,
    .person-card-toggle {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }

    /* Mobile adjustments for collaborator dropdowns */
    .collaborator-header {
        align-items: center;
        gap: 0.75rem;
    }
}

/* Floating TOC Styles */
.floating-toc {
    position: fixed;
    top: 140px;
    left: 20px;
    z-index: 100;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    opacity: 1;
    transform: translateY(0);
}

.toc-toggle {
    width: 50px;
    height: 50px;
    background: rgba(142, 111, 62, 0.95);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
    backdrop-filter: blur(10px);
    z-index: 101;
}

.toc-toggle:hover {
    background: rgba(142, 111, 62, 1);
    transform: scale(1.05);
}

.toc-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.toc-panel {
    position: absolute;
    top: 0;
    left: 0;
    width: 220px;
    height: calc(100vh - 160px);
    max-height: calc(100vh - 160px);
    background: rgba(31, 41, 55, 0.98);
    border: 1px solid rgba(75, 85, 99, 0.9);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(20px);
    transform: translateX(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) rgba(75, 85, 99, 0.5);
}

.floating-toc.expanded .toc-panel {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
}

.floating-toc.expanded .toc-toggle {
    transform: translateX(220px) scale(0.9);
    background: rgba(239, 68, 68, 0.9);
}

.floating-toc.expanded .toc-toggle:hover {
    background: rgba(239, 68, 68, 1);
}

.floating-toc.expanded .toc-toggle i::before {
    content: "\f00d"; /* FontAwesome times icon */
}

.toc-header {
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid rgba(75, 85, 99, 0.9);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    font-weight: 600;
    font-size: 1rem;
    color: #f9fafb;
    gap: 0.5rem;
}

.toc-header h3 {
    font-weight: 600;
    font-size: 1rem;
    color: #f9fafb;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.toc-header h3 i {
    color: #d4a574;
}

.toc-header i {
    color: #d4a574;
}

.toc-close {
    background: none;
    border: none;
    color: #d1d5db;
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    transition: var(--transition);
}

.toc-close:hover {
    color: rgba(239, 68, 68, 0.9);
    background: rgba(239, 68, 68, 0.2);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-item {
    margin-bottom: 0.25rem;
}

.toc-link {
    display: block;
    padding: 0.5rem 0.75rem;
    color: #e5e7eb !important;
    text-decoration: none;
    font-size: 0.85rem;
    border-radius: 6px;
    transition: all 0.2s ease;
    line-height: 1.4;
    font-weight: 400;
    border-left: 3px solid transparent;
    background: transparent !important;
    position: relative;
    overflow: hidden;
}

.toc-link span {
    position: relative;
    z-index: 1;
}

.toc-link .count {
    display: inline-block;
    font-size: 0.7rem;
    opacity: 0.7;
    margin-left: 0.25rem;
    color: #9ca3af !important;
}

/* Reset any unwanted active states */
.toc-links .toc-link:not(.active):not(:hover) {
    background: transparent !important;
    color: #e5e7eb !important;
}

.toc-link:hover {
    background: rgba(142, 111, 62, 0.25) !important;
    border-left-color: #d4a574 !important;
    color: #f9fafb !important;
    font-weight: 500;
}

.toc-link.active {
    background: rgba(55, 65, 81, 0.6) !important;
    border-left-color: #d4a574 !important;
    color: #f9fafb !important;
    font-weight: 600;
}

.toc-link.active::after {
    content: '';
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #d4a574;
}

.toc-subitem .toc-link {
    font-size: 0.85rem;
    padding: 0.5rem 0.75rem;
    font-weight: 400;
}

.toc-subitem .toc-link.active {
    font-weight: 500;
}

.toc-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: rgba(75, 85, 99, 0.3);
    border-radius: 2px;
}

.toc-progress-bar {
    width: 100%;
    background: var(--primary-color);
    border-radius: 2px;
    transition: height 0.3s ease;
}

/* Publication links */
.publication-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* TOC progress bar styling */
.toc-progress {
    background: rgba(75, 85, 99, 0.8);
}

.toc-progress-bar {
    background: var(--primary-color);
}

/* Mobile adjustments for TOC */
@media (max-width: 768px) {.floating-toc {
        top: 100px;
        left: 15px;
    }

    .toc-toggle {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }

    .toc-panel {
        width: 240px;
        max-width: 75vw;
        max-height: 60vh;
        left: -10px;
        padding: 0.85rem;
    }

    .toc-header h3 {
        font-size: 0.95rem;
    }

    .toc-close {
        width: 30px;
        height: 30px;
        font-size: 1rem;
    }

    .toc-link {
        padding: 0.5rem 0.7rem !important;
        font-size: 0.9rem !important;
    }

    .toc-link .count {
        font-size: 0.8rem !important;
    }

    .toc-item {
        margin-bottom: 0.2rem;
    }

    .floating-toc.expanded .toc-toggle {
        transform: translateX(240px) scale(0.9);
    }

    /* Hide TOC when mobile menu is open */
    body.menu-open .floating-toc {
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }
}

/* Very small screens for TOC */
@media (max-width: 480px) {.toc-panel {
        width: 220px;
        max-width: 70vw;
        max-height: 55vh;
        padding: 0.75rem;
    }

    .toc-header h3 {
        font-size: 0.9rem;
    }

    .toc-link {
        padding: 0.45rem 0.6rem !important;
        font-size: 0.85rem !important;
    }

    .toc-link .count {
        font-size: 0.75rem !important;
    }

    .toc-item {
        margin-bottom: 0.15rem;
    }

    .floating-toc.expanded .toc-toggle {
        transform: translateX(220px) scale(0.85);
    }
}

/* TOC hover highlight */
.toc-link {
    position: relative;
}

/* Contact Page Specific Styles */

.contact-info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.85rem;
    margin-bottom: 0.85rem;
    align-items: stretch;
}

.contact-location-card,
.contact-hours-card {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border-top: 2px solid var(--primary-color);
    overflow: hidden;
}

.contact-location-card {
    grid-column: auto;
    display: flex;
    flex-direction: column;
}

.contact-hours-card {
    grid-column: auto;
    transform: none;
}

.contact-location-card::before,
.contact-hours-card::before {
    display: none;
}

.contact-location-card:hover,
.contact-hours-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.contact-hours-card:hover {
    transform: translateY(-2px);
}

.location-details,
.hours-details {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    flex: 1;
}

.location-place {
    display: flex;
    align-items: flex-start;
    gap: 0.55rem;
    padding: 0.45rem 0.5rem;
    background: var(--background-alt);
    border-radius: var(--border-radius);
    border-left: 2px solid var(--primary-color);
}

.location-icon {
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    border-radius: 4px;
    font-size: 0.75rem;
    flex-shrink: 0;
}

.location-place strong {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.1rem;
}

.location-place p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.82rem;
    line-height: 1.4;
}

.location-address {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.5rem;
    background: var(--background-alt);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.location-address i {
    color: var(--primary-color);
    font-size: 0.9rem;
}

.map-link-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.4rem 0.75rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.82rem;
    transition: var(--transition);
    margin-top: auto;
}

.map-link-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.hours-item {
    display: flex;
    align-items: flex-start;
    gap: 0.55rem;
    padding: 0.45rem 0.5rem;
    background: var(--background-alt);
    border-radius: var(--border-radius);
    border-left: 2px solid var(--primary-color);
}

.hours-item i {
    color: var(--primary-color);
    font-size: 0.9rem;
    width: 1.1rem;
    text-align: center;
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.hours-item strong {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.1rem;
}

.hours-item p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.82rem;
    line-height: 1.4;
}

.contact-collaboration-card {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.1rem;
    box-shadow: var(--shadow-sm);
    border-top: 2px solid var(--primary-color);
    margin-top: 0;
    transition: var(--transition);
    overflow: hidden;
    display: flex;
}

.contact-collaboration-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.collaboration-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1rem;
    align-items: center;
    width: 100%;
}

.collaboration-text h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.collaboration-text h3 i {
    color: var(--primary-color);
}

.collaboration-text > p {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.88rem;
    margin-bottom: 0.55rem;
}

.opportunities-section {
    padding-top: 0.55rem;
    border-top: 1px solid var(--border-color);
}

.opportunities-section h4 {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.opportunities-section h4 i {
    color: var(--primary-color);
}

.opportunities-section p {
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
    font-size: 0.85rem;
}

.collaboration-cta {
    display: flex;
    align-items: center;
    justify-content: center;
}

.collaboration-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.85rem;
    transition: var(--transition);
}

.collaboration-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.collaboration-btn i {
    font-size: 0.9rem;
}

@media (max-width: 968px) {.contact-primary-grid,
.contact-info-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .contact-main-card,
.contact-links-card,
.contact-location-card,
.contact-hours-card,
.contact-collaboration-card {
        grid-column: auto;
        transform: none;
        padding: 1rem 1.05rem;
    }

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

    .collaboration-content {
        grid-template-columns: 1fr;
        gap: 0.85rem;
    }

    .collaboration-cta {
        justify-content: flex-start;
    }

    .contact-card-header {
        margin-bottom: 0.65rem;
        padding-bottom: 0.4rem;
    }

    .contact-card-header h3 {
        font-size: 1.1rem;
    }

    .contact-person h4 {
        font-size: 1.25rem;
    }
}

/* ==========================================================
   Stats Bar (About section)
   ========================================================== */
.lab-stats-bar {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
    padding: 1.25rem 1rem;
    background: var(--background-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    flex: 1;
    min-width: 90px;
    padding: 0.25rem;
}

.stat-number {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: var(--font-display);
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 500;
    text-align: center;
}

/* ==========================================================
   News Section
   ========================================================== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.news-item {
    display: flex;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.news-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.news-item-icon {
    flex-shrink: 0;
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 50%;
    background: var(--background-alt);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 0.85rem;
    margin-top: 0.1rem;
}

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

.news-item-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-bottom: 0.3rem;
}

.news-type-badge {
    font-size: 0.68rem;
    font-weight: 700;
    padding: 0.12rem 0.5rem;
    border-radius: 10px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.news-type-publication { background: rgba(142,111,62,0.12); color: var(--primary-color); }
.news-type-conference  { background: rgba(30,90,160,0.1);   color: #1e5aa0; }
.news-type-student     { background: rgba(34,139,82,0.1);   color: #228b52; }
.news-type-award       { background: rgba(200,140,0,0.12);  color: #a07500; }
.news-type-general     { background: rgba(80,80,80,0.08);   color: var(--text-secondary); }

.news-date {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.news-item-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.25rem;
    line-height: 1.4;
}

.news-item-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0 0 0.4rem;
    line-height: 1.5;
}

.news-item-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.8rem;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.news-item-link:hover {
    text-decoration: underline;
}

.news-loading,
.news-empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem 0;
    font-size: 0.9rem;
}

.news-list-compact .news-item {
    display: grid;
    grid-template-columns: 7.5rem 6.5rem 1fr;
    align-items: start;
    gap: 0.35rem 0.75rem;
    padding: 0.45rem 0;
    text-decoration: none;
    color: inherit;
}

.news-list-compact .news-type-badge {
    display: inline-block;
    width: 100%;
    box-sizing: border-box;
    text-align: center;
}

.news-list-compact .news-item-title {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-list-compact .news-date {
    white-space: nowrap;
    padding-top: 0.12rem;
}

.news-list-compact a.news-item:hover .news-item-title {
    color: var(--primary-color);
}

.news-year-heading {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 1.25rem 0 0.35rem;
}

.news-year-heading:first-child {
    margin-top: 0;
}

.news-archive-list {
    max-width: 48rem;
}

/* ==========================================================
   New 3-column Footer (index.html)
   ========================================================== */
.footer-col {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.footer-lab-name {
    font-size: 1rem;
    font-weight: 700;
    color: white;
    margin: 0 0 0.1rem;
}

.footer-lab-full {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.6);
    font-style: italic;
    margin: 0 0 0.5rem;
    line-height: 1.4;
}

.footer-address {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.72);
    line-height: 2;
    margin: 0;
}

.footer-address i {
    width: 1rem;
    opacity: 0.6;
    margin-right: 0.3rem;
}

.footer-map-link {
    margin-left: 0.45rem;
    color: rgba(255,255,255,0.62);
    text-decoration: underline;
    text-underline-offset: 0.15em;
    font-size: 0.78rem;
    white-space: nowrap;
}

.footer-map-link:hover {
    color: white;
}

.footer-col-heading {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: rgba(255,255,255,0.45);
    margin: 0 0 0.5rem;
}

.footer-col-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.35rem 0.75rem;
}

.footer-col-links ul li a {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.78);
    text-decoration: none;
    transition: var(--transition);
}

.footer-col-links ul li a:hover {
    color: var(--primary-color);
}

.footer-col-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.75rem;
}

.footer-social {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.72);
    text-decoration: none;
    padding: 0.3rem 0.55rem;
    border-radius: 5px;
    border: 1px solid rgba(255,255,255,0.14);
    transition: var(--transition);
    white-space: nowrap;
}

.footer-social a:hover {
    color: white;
    border-color: var(--primary-color);
    background: rgba(142,111,62,0.2);
}

.footer-affil {
    font-size: 0.76rem;
    color: rgba(255,255,255,0.5);
    text-align: right;
    line-height: 1.5;
    margin: 0;
}

.footer-copy {
    font-size: 0.73rem;
    color: rgba(255,255,255,0.38);
    text-align: right;
    margin: 0;
}

.footer-credit {
    font-size: 0.73rem;
    color: rgba(255,255,255,0.38);
    text-align: right;
    margin: 0.15rem 0 0;
}

.footer-credit a {
    color: rgba(255,255,255,0.5);
    text-decoration: none;
}

.footer-credit a:hover {
    color: rgba(255,255,255,0.8);
}

.footer-info .footer-credit {
    text-align: center;
}

/* ==========================================================
   Funding Section
   ========================================================== */
.funding-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.funding-item {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--background-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
}

.funding-icon {
    flex-shrink: 0;
    width: 2.5rem;
    height: 2.5rem;
    background: rgba(142,111,62,0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1rem;
}

.funding-info h3 {
    margin: 0 0 0.25rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.funding-award {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0 0 0.25rem;
}

/* ==========================================================
   Responsive — new components
   ========================================================== */
@media (max-width: 768px) {
    .lab-stats-bar {
        gap: 0.5rem;
        padding: 1rem 0.75rem;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .news-item-icon {
        display: none;
    }

    .news-list-compact .news-item {
        grid-template-columns: 7.5rem 1fr;
    }

    .news-list-compact .news-date {
        justify-self: end;
    }

    .news-list-compact .news-item-title {
        grid-column: 1 / -1;
    }

    .footer-col-right {
        align-items: flex-start;
    }

    .footer-social {
        justify-content: flex-start;
    }

    .footer-affil,
    .footer-copy,
    .footer-credit {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .stat-item {
        min-width: 70px;
    }

    .stat-number {
        font-size: 1.35rem;
    }

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