:root {
    --illinois-orange: #FF5F05;
    --illinois-blue: #13294B;
    --dark-bg: #0a1929;
    --darker-bg: #050c16;
    --card-bg: #162033;
    --text-primary: #e3e8ef;
    --text-secondary: #a0aec0;
    --border-color: #1e3a5f;
    --sidebar-width: 280px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--dark-bg);
    overflow-x: hidden;
}

.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 1.5rem;
    left: 1.5rem;
    z-index: 1002;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    cursor: pointer;
    width: 50px;
    height: 50px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--illinois-orange);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle:hover {
    background-color: rgba(255, 95, 5, 0.1);
    border-color: var(--illinois-orange);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.menu-overlay.active {
    display: block;
    opacity: 1;
}

.side-nav {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--darker-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 3rem 0;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.nav-header {
    padding: 0 2rem;
    margin-bottom: 3rem;
}

.nav-logo {
    font-size: 2rem;
    font-weight: bold;
    color: var(--illinois-orange);
    letter-spacing: -0.05em;
}

.nav-links {
    list-style: none;
    flex-grow: 1;
    padding: 0 1.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    transition: all 0.2s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: rgba(255, 95, 5, 0.1);
}

.nav-link.active {
    color: var(--illinois-orange);
    background-color: rgba(255, 95, 5, 0.1);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background-color: var(--illinois-orange);
    border-radius: 0 3px 3px 0;
}

.nav-number {
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    opacity: 0.6;
}

.nav-text {
    font-size: 0.95rem;
    font-weight: 500;
}

.nav-footer {
    padding: 0 2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 2rem;
}

.social-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.social-link:hover {
    color: var(--illinois-orange);
}

.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.content-section {
    min-height: 100vh;
    padding: 5rem 4rem;
    position: relative;
    display: flex;
    align-items: center;
}

.section-number {
    position: absolute;
    top: 3rem;
    left: 2rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--illinois-orange);
    font-family: 'Courier New', monospace;
}

.section-content {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.section-heading {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 3rem;
    position: relative;
}

.section-heading::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 80px;
    height: 4px;
    background-color: var(--illinois-orange);
}

.hero-section {
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 0 6rem;
    min-height: 100vh;
}

.hero-content {
    max-width: 1000px;
}

.hero-intro {
    font-size: 1.2rem;
    color: var(--illinois-orange);
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.hero-name {
    font-size: 5rem;
    font-weight: 900;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.hero-tagline {
    font-size: 4.5rem;
    font-weight: 900;
    line-height: 1.1;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

#typewriter {
    color: var(--illinois-orange);
}

.typewriter-cursor {
    color: var(--illinois-orange);
}

.hero-bio {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 700px;
}

.hero-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.hero-location {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background-color: var(--illinois-orange);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.05rem;
    transition: all 0.2s ease;
    min-height: 48px;
    justify-content: center;
}

.cta-button:hover {
    background-color: #e55504;
    gap: 1rem;
}

.hero-accent {
    position: absolute;
    right: -10%;
    top: 50%;
    transform: translateY(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 95, 5, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.stat-item {
    padding: 1.5rem;
    background-color: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--illinois-orange);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.education-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--illinois-orange);
    border-radius: 12px;
    padding: 2.5rem;
}

.edu-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
    gap: 2rem;
}

.edu-header h3 {
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.degree {
    font-size: 1.15rem;
    color: var(--text-secondary);
}

.date {
    color: var(--illinois-orange);
    font-weight: 600;
    white-space: nowrap;
}

.edu-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.gpa-highlight {
    font-size: 1.1rem;
    color: var(--illinois-orange);
    font-weight: 700;
}

.coursework strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 1rem;
}

.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: rgba(255, 95, 5, 0.1);
    border: 1px solid rgba(255, 95, 5, 0.3);
    color: var(--illinois-orange);
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
}

.projects-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.project-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: border-color 0.2s ease;
    position: relative;
}

.project-item:hover {
    border-color: var(--illinois-orange);
}

.project-number {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: 3rem;
    font-weight: 900;
    color: rgba(255, 95, 5, 0.1);
    font-family: 'Courier New', monospace;
}

.project-name {
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.project-desc {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.project-tech {
    color: var(--illinois-orange);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    font-family: 'Courier New', monospace;
}

.project-links {
    display: flex;
    gap: 1.5rem;
}

.project-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
    font-size: 0.95rem;
}

.project-link:hover {
    color: var(--illinois-orange);
}

.date-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: rgba(255, 95, 5, 0.1);
    border: 1px solid rgba(255, 95, 5, 0.3);
    color: var(--illinois-orange);
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
}

.skills-container {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.skill-group-title {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--illinois-orange);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-tag {
    padding: 0.75rem 1.5rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.skill-tag:hover {
    border-color: var(--illinois-orange);
    color: var(--illinois-orange);
}

.contact-message {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.7;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.contact-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-decoration: none;
    transition: border-color 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
    min-height: 150px;
}

.contact-card:hover {
    border-color: var(--illinois-orange);
}

.contact-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.contact-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.footer {
    padding: 3rem 4rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    height: 3px;
    background: var(--illinois-orange);
    transform-origin: left;
    z-index: 1001;
    transition: width 0.1s ease-out;
}

@media (max-width: 1024px) {
    :root {
        --sidebar-width: 280px;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .side-nav {
        transform: translateX(-100%);
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
        z-index: 1001;
        width: var(--sidebar-width);
        padding-top: 5rem;
    }

    .side-nav.open {
        transform: translateX(0);
    }

    .nav-header {
        margin-bottom: 2rem;
    }

    body.menu-open {
        overflow: hidden;
    }

    .main-content {
        margin-left: 0;
    }

    .scroll-progress {
        left: 0;
        width: 100%;
    }

    .content-section {
        padding: 4rem 2rem;
    }

    .hero-section {
        padding: 0 3rem;
        padding-top: 80px;
    }

    .hero-name {
        font-size: 3.5rem;
    }

    .hero-tagline {
        font-size: 3rem;
    }

    .hero-bio {
        font-size: 1.1rem;
    }

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

    .section-heading {
        font-size: 2.5rem;
    }

    .section-number {
        top: 5rem;
    }
}

@media (max-width: 768px) {
    .content-section {
        padding: 3rem 1.5rem;
        min-height: auto;
    }

    .hero-section {
        padding: 0 2rem;
        padding-top: 80px;
        min-height: 100vh;
        display: flex;
        align-items: center;
    }

    .hero-intro {
        font-size: 1rem;
    }

    .hero-name {
        font-size: 2.5rem;
    }

    .hero-tagline {
        font-size: 2.2rem;
    }

    .hero-bio {
        font-size: 1rem;
        line-height: 1.7;
    }

    .section-heading {
        font-size: 2rem;
    }

    .section-number {
        top: 4rem;
        left: 1.5rem;
    }

    .edu-header {
        flex-direction: column;
    }

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

    .hero-accent {
        width: 400px;
        height: 400px;
    }

    .project-item {
        padding: 1.5rem;
    }

    .project-number {
        font-size: 2rem;
        top: 1.5rem;
        right: 1.5rem;
    }

    .nav-link {
        padding: 1rem 1rem;
        font-size: 1.1rem;
        min-height: 48px;
        display: flex;
        align-items: center;
    }

    .stat-item {
        padding: 1.25rem;
    }

    .about-stats {
        gap: 1.5rem;
    }

    .social-link {
        padding: 0.5rem 0;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .contact-card {
        min-height: 180px;
        padding: 2rem 1.5rem;
    }

    .project-desc {
        font-size: 1rem;
        line-height: 1.6;
    }
}

@media (max-width: 480px) {
    .mobile-menu-toggle {
        top: 1rem;
        left: 1rem;
        width: 45px;
        height: 45px;
    }

    .mobile-menu-toggle span {
        width: 22px;
    }

    .hero-section {
        padding: 0 1.5rem;
        padding-top: 70px;
    }

    .hero-intro {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }

    .hero-name {
        font-size: 2rem;
        margin-bottom: 0.75rem;
    }

    .hero-tagline {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
    }

    .hero-bio {
        font-size: 0.95rem;
    }

    .section-heading {
        font-size: 1.75rem;
        margin-bottom: 2rem;
    }

    .section-number {
        font-size: 0.9rem;
        top: 3.5rem;
        left: 1rem;
    }

    .content-section {
        padding: 2.5rem 1.25rem;
    }

    .cta-button {
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }

    .project-item {
        padding: 1.25rem;
    }

    .project-name {
        font-size: 1.5rem;
    }

    .project-number {
        font-size: 1.5rem;
        top: 1.25rem;
        right: 1.25rem;
    }

    .education-box,
    .contact-card {
        padding: 1.5rem;
    }

    .edu-header h3 {
        font-size: 1.5rem;
    }

    .stat-value {
        font-size: 2rem;
    }

    .skill-tag {
        padding: 0.6rem 1.25rem;
        font-size: 0.85rem;
    }

    .footer {
        padding: 2rem 1.25rem;
        font-size: 0.85rem;
    }

    .about-text p {
        font-size: 1rem;
        line-height: 1.7;
    }

    .degree {
        font-size: 1rem;
    }

    .date {
        font-size: 0.9rem;
    }
}

@media (hover: none) and (pointer: coarse) {
    .nav-link,
    .social-link,
    .contact-card,
    .project-link {
        min-height: 44px;
    }

    .skill-tag,
    .tag {
        min-height: 40px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}