/* CSS Reset (Optional but Recommended) */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px; /* Base font size */
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Define CSS Variables */
:root {
    /* Light theme particle colors */
    --particle-color1-l: #333333;
    --plexus-particle-l: #666666;
    --plexus-line-l: rgba(102, 102, 102, 0.3);

    /* Dark theme particle colors (placeholders, adjust as needed) */
    --particle-color1-d: #ffffff;
    --plexus-particle-d: #cccccc;
    --plexus-line-d: rgba(204, 204, 204, 0.2);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Borders */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;

    /* Transitions */
    --transition-fast: 0.2s ease-in-out;
    --transition-medium: 0.3s ease-in-out;
}

/* Light Theme Styles */
[data-theme="light"] {
    --bg-color: #f8f9fa; /* Off-white background */
    --text-color: #212529; /* Dark gray text */
    --text-color-muted: #6c757d; /* Lighter gray for muted text */
    --heading-color: #343a40; /* Darker gray for headings */
    --link-color: #0069d9; /* Bootstrap primary blue */
    --link-hover-color: #0056b3;
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --accent-color: var(--primary-color); /* Can be same or different */

    --card-bg: #ffffff;
    --card-border-color: rgba(0, 0, 0, 0.1);
    --card-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);

    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.1);
    --glass-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    --glass-text-color: var(--text-color);

    --nav-bg: rgba(255, 255, 255, 0.95);
    --nav-text-color: var(--text-color);
    --nav-logo-color: var(--primary-color);
    --nav-link-hover-bg: rgba(0, 0, 0, 0.05);

    --button-primary-bg: var(--primary-color);
    --button-primary-text: #ffffff;
    --button-primary-hover-bg: #0056b3;

    --button-secondary-bg: transparent;
    --button-secondary-text: var(--primary-color);
    --button-secondary-border: var(--primary-color);
    --button-secondary-hover-bg: rgba(0, 123, 255, 0.1);
    --button-secondary-hover-text: var(--primary-color);

    --timeline-icon-bg: var(--primary-color);
    --timeline-icon-color: #ffffff;
    --timeline-line-color: #dee2e6; /* Light gray line */
    --timeline-item-bg: var(--card-bg);

    --skill-tag-bg: #e9ecef;
    --skill-tag-text: #495057;
    --skill-category-bg: var(--card-bg);

    --pipe-color: #ced4da;

    /* Use light theme particle colors */
    --current-particle-color1: var(--particle-color1-l);
    --current-plexus-particle: var(--plexus-particle-l);
    --current-plexus-line: var(--plexus-line-l);
}

/* Dark Theme Styles (Example - fill this out more completely) */
[data-theme="dark"] {
    --bg-color: #121212; /* Very dark gray */
    --text-color: #e0e0e0; /* Light gray text */
    --text-color-muted: #a0a0a0;
    --heading-color: #ffffff;
    --link-color: #64b5f6; /* Lighter blue for dark mode */
    --link-hover-color: #90caf9;
    --primary-color: #3f51b5; /* Example: Indigo */
    --secondary-color: #757575;
    --accent-color: var(--primary-color);

    --card-bg: #1e1e1e; /* Darker card background */
    --card-border-color: rgba(255, 255, 255, 0.1);
    --card-shadow: 0 0.125rem 0.25rem rgba(255, 255, 255, 0.05);

    --glass-bg: rgba(30, 30, 30, 0.75); /* Dark semi-transparent */
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: 0 4px 15px rgba(0,0,0,0.3);
    --glass-text-color: var(--text-color);

    --nav-bg: rgba(25, 25, 25, 0.95);
    --nav-text-color: var(--text-color);
    --nav-logo-color: var(--link-color);
    --nav-link-hover-bg: rgba(255, 255, 255, 0.1);

    --button-primary-bg: var(--primary-color);
    --button-primary-text: #ffffff;
    --button-primary-hover-bg: #283593; /* Darker indigo */

    --button-secondary-bg: transparent;
    --button-secondary-text: var(--link-color);
    --button-secondary-border: var(--link-color);
    --button-secondary-hover-bg: rgba(100, 181, 246, 0.15);
    --button-secondary-hover-text: var(--link-color);

    --timeline-icon-bg: var(--primary-color);
    --timeline-icon-color: #ffffff;
    --timeline-line-color: #424242; /* Darker gray line */
    --timeline-item-bg: var(--card-bg);

    --skill-tag-bg: #333333;
    --skill-tag-text: #e0e0e0;
    --skill-category-bg: var(--card-bg);

    --pipe-color: #555555;

    /* Use dark theme particle colors */
    --current-particle-color1: var(--particle-color1-d);
    --current-plexus-particle: var(--plexus-particle-d);
    --current-plexus-line: var(--plexus-line-d);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
}

/* Utility Classes */
.container {
    width: 90%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
}

.section-padding {
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: var(--heading-color);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}
.section-title::after { /* Optional underline */
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 0.5rem auto 0;
}

.sub-section-title {
    font-size: 1.5rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
}
.sub-section-title i {
    margin-right: var(--spacing-xs);
    color: var(--primary-color);
}


.text-center { text-align: center; }
.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-color-muted);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px); /* Safari */
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--glass-shadow);
    color: var(--glass-text-color);
}

/* Loading Screen */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.5s ease-out;
}
.loader {
    border: 8px solid var(--card-bg); /* Lighter part of the circle */
    border-top: 8px solid var(--primary-color); /* Colored part */
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Particles.js canvas */
#particles-js, #hero-plexus-canvas {
    position: fixed; /* Or absolute, depending on desired effect */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1; /* Behind content */
}


/* Header & Navigation */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--nav-bg);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: background-color var(--transition-medium);
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}
.nav-logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--nav-logo-color);
    text-decoration: none;
}
.nav-links {
    list-style: none;
    display: flex;
}
.nav-links li {
    margin-left: var(--spacing-md);
}
.nav-links a {
    text-decoration: none;
    color: var(--nav-text-color);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}
.nav-links a:hover, .nav-links a.active {
    background-color: var(--nav-link-hover-bg);
    color: var(--primary-color);
}
.nav-controls {
    display: flex; /* ADD THIS */
    align-items: center; /* ADD THIS to vertically align items if they have different heights */
    gap: var(--spacing-sm); /* Optional: ADD THIS to create space between the buttons */
}
.nav-controls button {
    background: none;
    border: none;
    color: var(--nav-text-color);
    font-size: 1.2rem;
    cursor: pointer;
    /* margin-left: var(--spacing-sm); REMOVE or adjust this if you use gap */
    padding: var(--spacing-xs);
}
.nav-controls button:hover {
    color: var(--primary-color);
}
.nav-toggle {
    display: none; /* Hidden on desktop */
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative; /* For canvas positioning */
    padding-top: 70px; /* Offset for fixed header */
    text-align: center;
}
.hero-content {
    padding: var(--spacing-lg);
    max-width: 800px;
}
[data-theme="light"] .hero-content.glass-effect {
    background: rgba(255, 255, 255, 0.7); /* More transparent for hero over particles */
    backdrop-filter: blur(8px);
}
.hero-layout-wrapper {
    display: flex;
    flex-direction: column; /* Default stack for mobile */
    align-items: center;
    gap: var(--spacing-md);
}
.hero-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
    margin-bottom: var(--spacing-sm);
}
.hero-text-content h1 {
    font-family: 'Playfair Display', serif;
    font-size: 3rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-xs);
}
.tagline {
    font-size: 1.25rem;
    color: var(--text-color-muted);
    margin-bottom: var(--spacing-sm);
}
.tagline .pipe {
    color: var(--pipe-color);
    margin: 0 0.5em;
}
.hero-summary {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.social-links a {
    color: var(--text-color);
    font-size: 1.5rem;
    margin: 0 var(--spacing-xs);
    transition: color var(--transition-fast);
}
.social-links a:hover {
    color: var(--primary-color);
}
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 1px solid transparent;
    font-size: 1rem;
}
.btn-primary {
    background-color: var(--button-primary-bg);
    color: var(--button-primary-text);
    border-color: var(--button-primary-bg);
}
.btn-primary:hover {
    background-color: var(--button-primary-hover-bg);
    border-color: var(--button-primary-hover-bg);
    color: var(--button-primary-text);
}
.btn-secondary {
    background-color: var(--button-secondary-bg);
    color: var(--button-secondary-text);
    border: 1px solid var(--button-secondary-border);
}
.btn-secondary:hover {
    background-color: var(--button-secondary-hover-bg);
    color: var(--button-secondary-hover-text);
}
.hero-content .btn-primary {
    margin-top: var(--spacing-md);
}


/* About Section */
.about-content-wrapper.glass-effect {
    padding: var(--spacing-lg);
}
.about-columns {
    display: flex;
    flex-direction: column; /* Mobile first */
    gap: var(--spacing-lg);
}
.about-description-column p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}
.about-education-column h3, .about-description-column h3 {
    font-size: 1.5rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: var(--spacing-xs);
    display: inline-block;
}
.education-item h4 {
    font-size: 1.1rem;
    color: var(--heading-color);
    margin-bottom: 0.25rem;
}
.education-item p {
    color: var(--text-color-muted);
    font-size: 0.95rem;
}
.education-item p em {
    color: var(--text-color);
}

/* Experience Section */
.experience-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}
.experience-timeline::before { /* The central line */
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px; /* Adjust based on icon size */
    width: 3px;
    background-color: var(--timeline-line-color);
    z-index: 0;
}
.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    padding-left: 60px; /* Space for icon and some margin */
    background-color: var(--timeline-item-bg); /* Card-like background for items */
}
.timeline-icon {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--timeline-icon-bg);
    color: var(--timeline-icon-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    z-index: 1;
    border: 3px solid var(--bg-color); /* Creates a "pop-out" effect */
}
.timeline-content h3 {
    font-size: 1.3rem;
    color: var(--heading-color);
    margin-bottom: 0.25rem;
}
.timeline-content h4 {
    font-size: 1rem;
    color: var(--text-color-muted);
    margin-bottom: 0.25rem;
}
.timeline-content .dates {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}
.timeline-content p {
    margin-bottom: var(--spacing-xs);
    color: var(--text-color);
}
.timeline-content ul {
    list-style-position: outside;
    padding-left: var(--spacing-md);
    margin-top: var(--spacing-xs);
}
.timeline-content li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-color);
}
.timeline-content strong {
    color: var(--primary-color);
}
.volunteer-experience-wrapper {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md);
}
.volunteer-item h4 {
    font-size: 1.2rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-xs);
}
.volunteer-item .dates {
    font-size: 0.9rem;
    color: var(--text-color-muted);
    margin-bottom: var(--spacing-xs);
}
.volunteer-item p {
    color: var(--text-color);
}

/* Skills Section */
.skills-grid {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: 1fr; /* Mobile: 1 column */
}
.skill-category {
    padding: var(--spacing-md);
    background-color: var(--skill-category-bg);
}
.skill-category h3 {
    font-size: 1.2rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
}
.skill-category h3 i {
    margin-right: var(--spacing-xs);
    color: var(--primary-color);
}
.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}
.skill-tags span {
    background-color: var(--skill-tag-bg);
    color: var(--skill-tag-text);
    padding: 0.4rem 0.8rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
}

/* Projects Section */
.projects-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr; /* Mobile: 1 column */
}
.project-card {
    background-color: var(--card-bg);
    overflow: hidden; /* To contain image corners */
    display: flex;
    flex-direction: column;
}
.project-thumbnail {
    width: 100%;
    height: 220px;
    object-fit: cover;
}
.project-info {
    padding: var(--spacing-md);
    flex-grow: 1; /* Allows card content to take up space */
    display: flex;
    flex-direction: column;
}
.project-info h3 {
    font-size: 1.3rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-xs);
}
.project-dates {
    font-size: 0.85rem;
    color: var(--text-color-muted);
    margin-bottom: var(--spacing-sm);
}
.project-info p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
    font-size: 0.95rem;
    flex-grow: 1; /* Pushes links to bottom */
}
.tech-stack {
    font-size: 0.9rem;
    color: var(--text-color-muted);
    margin-bottom: var(--spacing-sm);
}
.tech-stack strong {
    color: var(--text-color);
}
.project-links {
    margin-top: auto; /* Pushes links to the bottom of the card info */
    display: flex;
    gap: var(--spacing-sm);
}
.project-links .mr-2 { /* If you use helper classes */
    margin-right: var(--spacing-sm);
}

/* Highlights Section */
.highlights-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr; /* Mobile */
}
.highlight-item {
    padding: var(--spacing-md);
}
.highlight-item h3 {
    font-size: 1.3rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
}
.highlight-item h3 i {
    margin-right: var(--spacing-xs);
    color: var(--primary-color);
}
.highlight-item ul {
    list-style: none;
    padding-left: 0;
}
.highlight-item li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-color);
    font-size: 0.95rem;
}
.highlight-item li strong {
    color: var(--heading-color);
}
.highlight-item li a {
    color: var(--link-color);
    text-decoration: none;
    font-weight: 500;
}
.highlight-item li a:hover {
    text-decoration: underline;
    color: var(--link-hover-color);
}

/* References Section */
.references-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr; /* Mobile */
}
.reference-item.glass-effect {
    padding: var(--spacing-md);
}
.reference-item-inner {
    display: flex;
    flex-direction: column; /* Mobile default */
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
}
.reference-image-col .reference-image {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
}
.reference-details-col h4 {
    font-size: 1.2rem;
    color: var(--heading-color);
    margin-bottom: var(--spacing-xs);
}
.reference-affiliation {
    font-size: 0.95rem;
    color: var(--text-color-muted);
    font-style: italic;
    margin-bottom: var(--spacing-xs);
}
.reference-context {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-bottom: var(--spacing-sm);
}
.reference-contact-link {
    color: var(--link-color);
    text-decoration: none;
    font-weight: 500;
}
.reference-contact-link i {
    margin-right: 0.25rem;
}
.reference-contact-link:hover {
    text-decoration: underline;
    color: var(--link-hover-color);
}

/* Contact Section */
.contact-box.glass-effect {
    padding: var(--spacing-lg);
    max-width: 700px;
    margin: 0 auto;
}
.contact-box p {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
    font-size: 1.05rem;
}
.main-contact-btn {
    font-size: 1.1rem;
    padding: 0.8rem 2rem;
    margin-bottom: var(--spacing-md);
}
.contact-info-icons {
    margin-bottom: var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-color);
}
.contact-info-icons span i {
    margin-right: var(--spacing-xs);
    color: var(--primary-color);
}
.social-links-contact {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}
.social-links-contact a {
    color: var(--text-color);
    font-size: 1rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: color var(--transition-fast);
}
.social-links-contact a:hover {
    color: var(--primary-color);
}
.social-links-contact a i {
    font-size: 1.3rem;
}

/* Footer */
footer {
    background-color: var(--card-bg); /* Or a slightly darker shade than body */
    color: var(--text-color-muted);
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid var(--card-border-color);
    font-size: 0.9rem;
}
[data-theme="dark"] footer {
    background-color: #1a1a1a;
}

/* Fade-in animation (if you want to keep it) */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInAnimation 0.8s ease-out forwards;
}
@keyframes fadeInAnimation {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
section.fade-in { /* Add delay to sections for staggered effect */
    /* You might need JavaScript to add 'visible' class on scroll for this to be effective per section */
}


/* Responsive Adjustments */

/* Medium screens (tablets) */
@media (min-width: 768px) {
    .nav-toggle { display: none; } /* Hamburger hidden */
    .nav-links { display: flex; } /* Links shown */

    .hero-layout-wrapper {
        flex-direction: row; /* Side-by-side */
        text-align: left;
    }
    .hero-image-container {
        margin-bottom: 0;
        margin-right: var(--spacing-lg); /* Space between image and text */
    }
    .hero-text-content {
        text-align: left;
    }
    .hero-summary { margin-left: 0; }
    .social-links { justify-content: flex-start; }


    .about-columns {
        flex-direction: row; /* Two columns */
    }
    .about-description-column, .about-education-column {
        flex: 1;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr); /* 2 columns for skills */
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr); /* 2 columns for projects */
    }

    .highlights-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* Flexible columns */
    }
    .reference-item-inner {
        flex-direction: row; /* Side-by-side image and text */
        text-align: left;
        align-items: flex-start;
    }
    .reference-image-col {
        margin-right: var(--spacing-md);
        margin-bottom: 0;
    }
    .contact-info-icons {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-md);
    }

}

/* Large screens (desktops) */
@media (min-width: 992px) {
    .section-title { font-size: 3rem; }

    .skills-grid {
        /* If you have many skill categories, 3 columns might be good */
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        /* Or explicitly: grid-template-columns: repeat(3, 1fr); */
    }
    .projects-grid {
        /* Optionally, 3 columns for projects on very wide screens */
        /* grid-template-columns: repeat(3, 1fr); */
    }
    .references-grid {
         grid-template-columns: repeat(2, 1fr); /* Keep 2 for references or make it 3 if short */
    }
}

/* Mobile Navigation (Hamburger Menu) */
@media (max-width: 767px) {
    .nav-links {
        display: none; /* Hidden by default */
        flex-direction: column;
        position: absolute;
        top: 70px; /* Below header */
        left: 0;
        width: 100%;
        background-color: var(--nav-bg);
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        padding-bottom: var(--spacing-sm);
    }
    .nav-links.active { /* Class added by JS to show menu */
        display: flex;
    }
    .nav-links li {
        margin-left: 0;
        text-align: center;
    }
    .nav-links a {
        display: block;
        padding: var(--spacing-sm);
        border-bottom: 1px solid var(--card-border-color);
    }
    .nav-links li:last-child a {
        border-bottom: none;
    }
    .nav-toggle {
        display: block; /* Show hamburger */
    }
    .experience-timeline::before {
        left: 20px; /* Icon position */
    }
    .timeline-item {
        padding-left: 55px; /* Space for icon */
    }
}