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

:root {
    --bg-dark: #0d1117;
    --bg-card: #161b22;
    --accent-blue: #58a6ff;
    --accent-purple: #bc8cff;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --border: #30363d;
    --gradient: linear-gradient(135deg, #58a6ff 0%, #bc8cff 100%);
}

body {
    background: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-family: 'Libre Baskerville', serif;
    font-size: 1.5rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-blue);
}

.menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Page Content */
.page-content {
    padding: 8rem 2rem 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    margin-bottom: 3rem;
}

.section-label {
    color: var(--accent-purple);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
}

.section-title {
    font-family: 'Libre Baskerville', serif;
    font-size: 2.5rem;
    margin: 0.5rem 0 1rem;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Education Cards */
.education-timeline {
    display: grid;
    gap: 2rem;
    margin-bottom: 4rem;
}

.edu-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent-blue);
    border-radius: 12px;
    padding: 2.5rem;
    transition: all 0.3s;
}

.edu-card:hover {
    border-left-color: var(--accent-purple);
    transform: translateX(8px);
}

.edu-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.edu-degree h2 {
    font-size: 1.6rem;
    color: var(--accent-blue);
    margin-bottom: 0.3rem;
}

.edu-degree h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    font-weight: 500;
}

.edu-year {
    background: rgba(88, 166, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    color: var(--accent-blue);
    font-weight: 600;
}

.edu-institution {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(88, 166, 255, 0.05);
    border-radius: 8px;
}

.institution-icon {
    font-size: 2rem;
}

.edu-institution h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.edu-institution p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.edu-details {
    margin-bottom: 1.5rem;
}

.edu-details p {
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
    line-height: 1.7;
}

.edu-details a {
    color: var(--accent-blue);
    text-decoration: none;
}

.edu-details a:hover {
    text-decoration: underline;
}

.edu-achievements h4 {
    color: var(--accent-purple);
    margin-bottom: 1rem;
}

.edu-achievements ul {
    list-style: none;
    padding: 0;
}

.edu-achievements li {
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
    position: relative;
    color: var(--text-secondary);
}

.edu-achievements li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-purple);
}

/* Additional Training */
.additional-training {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2.5rem;
}

.additional-training h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--accent-blue);
}

.training-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.training-card {
    background: rgba(88, 166, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
}

.training-card h3 {
    color: var(--accent-purple);
    margin-bottom: 1rem;
}

.language-item {
    display: flex;
    justify-content: space-between;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border);
}

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

.proficiency {
    color: var(--accent-blue);
    font-weight: 600;
}

.training-card ul {
    list-style: none;
    padding: 0;
}

.training-card li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

/* Timeline (for experience page) */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient);
}

.timeline-entry {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    margin-left: 2rem;
    position: relative;
}

.timeline-entry::before {
    content: '';
    position: absolute;
    left: -3rem;
    top: 2rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-blue);
    border: 3px solid var(--bg-dark);
}

.timeline-entry:hover {
    border-color: var(--accent-blue);
}

.timeline-header {
    margin-bottom: 1.2rem;
}

.timeline-header h3 {
    font-size: 1.4rem;
    color: var(--accent-blue);
    margin-bottom: 0.3rem;
}

.timeline-role {
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.timeline-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.timeline-content ul {
    list-style: none;
    padding: 0;
}

.timeline-content li {
    color: var(--text-secondary);
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
    position: relative;
    line-height: 1.7;
}

.timeline-content li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-purple);
    font-weight: 700;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s;
}

.skill-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-4px);
}

.skill-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--accent-blue);
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.skill-tag {
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid rgba(88, 166, 255, 0.3);
    color: var(--accent-blue);
    padding: 0.4rem 0.9rem;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* Publications */
.publications-list {
    display: grid;
    gap: 1.5rem;
}

.pub-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent-purple);
    border-radius: 8px;
    padding: 2rem;
    transition: all 0.3s;
}

.pub-item:hover {
    border-left-color: var(--accent-blue);
    transform: translateX(8px);
}

.pub-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    line-height: 1.5;
}

.pub-authors {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0.8rem;
    line-height: 1.5;
}

.pub-authors strong {
    color: var(--accent-blue);
}

.pub-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.pub-journal {
    color: var(--accent-purple);
    font-style: italic;
    font-size: 0.9rem;
}

.pub-link {
    color: var(--accent-blue);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s;
}

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

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    margin-top: 4rem;
}

/* Responsive */
@media (max-width: 968px) {
    .nav-links {
        display: none;
    }

    .menu-btn {
        display: block;
    }

    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-dark);
        border-top: 1px solid var(--border);
        padding: 1rem 2rem;
    }

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

@media (max-width: 640px) {
    .page-content {
        padding: 7rem 1.5rem 3rem;
    }

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

    .timeline {
        padding-left: 1rem;
    }

    .timeline-entry {
        margin-left: 1rem;
    }

    .timeline-entry::before {
        left: -2rem;
    }
}