:root {
    /* Light Theme (Default) */
    --bg-white: #ffffff;
    --bg-light: #fdfbf7;
    --bg-gray: #f3f4f6;
    --bg-dark: #0f172a;
    
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-light: #9ca3af;
    
    --accent-blue: #1e3a8a;
    --accent-gold: #c5a059;
    
    /* Typography */
    --font-heading: 'Cinzel', serif;
    --font-body: 'Lora', serif;
    --font-ui: 'Montserrat', sans-serif;
    
    /* Layout */
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --border-color: #e5e7eb;
}

[data-theme="dark"] {
    /* Dark Theme Overrides */
    --bg-white: #0f172a; /* Main background becomes dark */
    --bg-light: #1e293b; /* Slightly lighter dark for contrast */
    --bg-gray: #334155;
    --bg-dark: #020617; /* Even darker for sections */
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-light: #94a3b8;
    
    --accent-blue: #3b82f6; /* Lighter blue for dark mode contrast */
    --border-color: #334155;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-primary);
    background-color: var(--bg-white);
    line-height: 1.8;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* Layout */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 7rem 0;
}

.section-dark {
    background-color: var(--bg-dark);
    color: #ffffff; /* Explicitly keep this white even in dark mode so it stays high contrast */
}
[data-theme="dark"] .section-dark {
    color: var(--text-primary);
}

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

/* Headings */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header.left-align {
    text-align: left;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    padding-bottom: 1rem;
}

.section-header.light h2 {
    color: #ffffff;
}
[data-theme="dark"] .section-header.light h2 {
    color: var(--text-primary);
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background-color: var(--accent-gold);
}

.section-header.left-align h2::after {
    left: 0;
    transform: none;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

[data-theme="dark"] .navbar {
    background-color: rgba(15, 23, 42, 0.98);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.nav-brand span {
    color: var(--accent-gold);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    font-family: var(--font-ui);
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
}

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

.theme-toggle, .mobile-menu-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-primary);
    transition: var(--transition);
}

.theme-toggle:hover {
    color: var(--accent-gold);
}

.mobile-menu-btn {
    display: none;
}

/* Scroll Progress Bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background-color: var(--accent-gold);
    z-index: 1001;
    transition: width 0.1s ease;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--accent-gold);
    color: #ffffff;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--bg-dark);
    transform: translateY(-5px);
}
[data-theme="dark"] .back-to-top:hover {
    background-color: var(--bg-light);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-color: var(--bg-white);
    background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 40px 40px;
    position: relative;
    transition: background-color 0.4s ease;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to top, var(--bg-white), transparent);
    pointer-events: none;
}

.hero-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
    z-index: 1;
}

.hero-content {
    text-align: center;
}

.hero-label {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--accent-gold);
    display: block;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: clamp(3.5rem, 8vw, 6rem);
    color: var(--bg-dark);
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

[data-theme="dark"] .hero-title {
    color: var(--text-primary);
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-secondary);
    font-style: italic;
    font-weight: 400;
}

.hero-divider {
    width: 1px;
    height: 60px;
    background-color: var(--accent-gold);
    margin: 3rem auto;
}

.hero-contact {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    font-family: var(--font-ui);
    font-size: 0.9rem;
}

.hero-contact a, .hero-contact span {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.hero-contact a:hover {
    color: var(--accent-blue);
}

.dot-separator {
    color: var(--accent-gold) !important;
}

/* About Section */
.about-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.lead-text {
    font-size: 1.5rem;
    color: var(--bg-dark);
    margin-bottom: 2rem;
    line-height: 1.6;
}

[data-theme="dark"] .lead-text {
    color: var(--text-primary);
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Stats Counter */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 3rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 2rem 0;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    color: var(--accent-gold);
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0;
}

.core-competencies {
    margin-top: 4rem;
}

.core-competencies h3 {
    font-family: var(--font-ui);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 2rem;
    text-align: center;
}

.competency-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.competency-grid span {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.competency-grid span:hover {
    border-color: var(--accent-gold);
    color: var(--text-primary);
}

/* Experience Section */
.experience-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.exp-block {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 3rem;
}

.exp-role-header {
    text-align: right;
}

.role-title {
    font-size: 1.5rem;
    color: var(--accent-gold);
    position: sticky;
    top: 100px;
}

.exp-institutions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Interactive Timeline Items */
.institution-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem 0;
}

[data-theme="dark"] .institution-item {
    border-bottom: 1px solid var(--border-color);
}

.institution-item:last-child {
    border-bottom: none;
}

.institution-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.interactive-item .institution-header {
    cursor: pointer;
}

.institution-item h4 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
    font-family: var(--font-body);
    font-weight: 400;
}

.institution-item .location {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.expand-btn {
    background: none;
    border: none;
    color: var(--accent-gold);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    padding: 0.5rem;
}

.interactive-item.active .expand-btn {
    transform: rotate(45deg);
}

.institution-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
}

.details-list {
    margin-top: 1.5rem;
    padding-left: 1.5rem;
    list-style-type: square;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

[data-theme="dark"] .details-list {
    color: var(--text-secondary);
}

.details-list li {
    margin-bottom: 0.75rem;
}

.exp-institutions.list-view .institution-item h4 {
    color: var(--accent-gold);
    font-size: 1.1rem;
}

.exp-institutions.list-view .institution-item p {
    font-family: var(--font-ui);
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

.exp-divider {
    height: 1px;
    background: rgba(255,255,255,0.1);
    margin: 3rem 0;
}

[data-theme="dark"] .exp-divider {
    background: var(--border-color);
}

/* Dual Layout (Education & Publications) */
.dual-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
}

.education-list {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.edu-item h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--bg-dark);
}

[data-theme="dark"] .edu-item h3 {
    color: var(--text-primary);
}

.edu-item .university {
    font-family: var(--font-ui);
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.publication-list {
    list-style: none;
}

.publication-list li {
    margin-bottom: 2rem;
    padding-left: 2rem;
    position: relative;
}

.publication-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 6px;
    height: 6px;
    background-color: var(--accent-gold);
    border-radius: 50%;
}

.publication-list strong {
    display: block;
    font-weight: 500;
    color: var(--bg-dark);
    margin-bottom: 0.25rem;
}

[data-theme="dark"] .publication-list strong {
    color: var(--text-primary);
}

.publication-list span {
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Professional Development */
.prof-dev-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.prof-dev-col h3 {
    font-family: var(--font-ui);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent-gold);
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.clean-list {
    list-style: none;
}

.clean-list li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.clean-list li:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

/* Contact Form */
.contact-wrapper {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    border: 1px solid var(--border-color);
    font-family: var(--font-body);
    font-size: 1rem;
    background-color: var(--bg-light);
    color: var(--text-primary);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-gold);
    background-color: var(--bg-white);
}

.submit-btn {
    background-color: var(--bg-dark);
    color: #ffffff;
    border: none;
    padding: 1rem 2rem;
    font-family: var(--font-ui);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

[data-theme="dark"] .submit-btn {
    background-color: var(--accent-gold);
    color: var(--bg-dark);
}

.submit-btn:hover {
    background-color: var(--accent-gold);
    color: #ffffff;
}

[data-theme="dark"] .submit-btn:hover {
    background-color: var(--text-primary);
}

/* Footer */
.footer {
    background-color: var(--bg-dark);
    color: #ffffff;
    padding: 6rem 0 3rem;
    text-align: center;
}

[data-theme="dark"] .footer {
    background-color: #020617; /* Extra dark footer */
}

.footer-name {
    font-size: 2rem;
    margin-bottom: 2rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    letter-spacing: 1px;
    transition: var(--transition);
}

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

.print-btn {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--text-light);
    padding: 0.75rem 1.5rem;
    margin-top: 2rem;
    font-family: var(--font-ui);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition);
}

.print-btn:hover {
    border-color: var(--accent-gold);
    color: #ffffff;
}

.copyright {
    color: var(--text-light);
    font-family: var(--font-ui);
    font-size: 0.8rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 3rem;
}

/* vCard Button */
.vcard-btn {
    display: inline-block;
    margin-top: 1.5rem;
    padding: 0.75rem 1.5rem;
    background-color: transparent;
    border: 1px solid var(--accent-gold);
    color: var(--accent-gold);
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    transition: var(--transition);
}

.vcard-btn:hover {
    background-color: var(--accent-gold);
    color: var(--bg-white);
}

[data-theme="dark"] .vcard-btn:hover {
    color: var(--bg-dark);
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 992px) {
    .dual-layout, .prof-dev-wrapper, .stats-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .stats-grid {
        gap: 2rem;
    }

    .exp-block {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .exp-role-header {
        text-align: left;
    }
    
    .role-title {
        position: static;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 1rem;
    }
    [data-theme="dark"] .role-title {
        border-bottom-color: var(--border-color);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-contact {
        flex-direction: column;
        gap: 1rem;
    }
    
    .dot-separator {
        display: none;
    }
    
    .section {
        padding: 5rem 0;
    }
}

/* Print Optimization Stylesheet */
@media print {
    /* Hide non-essential elements */
    .no-print {
        display: none !important;
    }

    /* Reset background colors and text colors for paper */
    body, .section-dark, .section-gray, .footer, .hero {
        background: #ffffff !important;
        color: #000000 !important;
    }

    /* Reset Typography sizes for print */
    body {
        font-size: 11pt;
        line-height: 1.4;
    }

    h1, .hero-title { font-size: 24pt !important; margin-bottom: 4pt; }
    h2, .section-header h2, .footer-name { font-size: 16pt !important; margin-bottom: 10pt; }
    h3, .role-title { font-size: 12pt !important; color: #000 !important; border: none !important; margin: 0 !important; }
    
    /* Reveal interactive timeline details by default */
    .institution-details {
        max-height: none !important;
        overflow: visible !important;
        display: block !important;
    }
    
    .details-list {
        color: #000 !important;
        margin-top: 5pt;
    }

    /* Layout tweaks */
    .section {
        padding: 10pt 0 !important;
    }
    
    .section-header {
        margin-bottom: 10pt !important;
        text-align: left !important;
        border-bottom: 1px solid #000;
        padding-bottom: 5pt;
    }
    
    .section-header h2::after {
        display: none;
    }
    
    .hero {
        min-height: auto !important;
        padding: 20pt 0 !important;
        background-image: none !important;
        text-align: left !important;
        border-bottom: 2px solid #000;
    }
    
    .hero-content {
        text-align: left !important;
    }
    
    .hero-divider {
        display: none;
    }

    .container {
        width: 100% !important;
        max-width: none !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    /* Exp block formatting */
    .exp-block {
        display: block !important;
        margin-bottom: 15pt !important;
    }

    .exp-role-header {
        text-align: left !important;
        margin-bottom: 5pt;
    }

    .institution-item {
        border-bottom: none !important;
        padding: 5pt 0 !important;
    }

    .institution-header h4 {
        color: #000 !important;
        font-weight: bold;
    }
    
    .exp-divider {
        display: none;
    }

    /* Show print-only elements */
    .print-only {
        display: block !important;
    }

    /* Ensure pages break cleanly */
    .page-break {
        page-break-before: always;
    }
    
    .institution-item, .edu-item {
        page-break-inside: avoid;
    }
    
    .dual-layout, .prof-dev-wrapper {
        display: block !important;
    }
    
    /* Remove animations */
    .fade-up {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}