/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --text-color: #1e293b;
    --text-light: #64748b;
    --bg-color: #ffffff;
    --bg-light: #f8fafc;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 3rem 2rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: white;
    color: #667eea;
}

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

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: #667eea;
}

/* Sections */
section {
    padding: 5rem 0;
}

section:nth-child(even) {
    background-color: var(--bg-light);
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--text-color);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.125rem;
    line-height: 1.8;
    text-align: center;
}

/* CV Section */
.cv-content {
    max-width: 900px;
    margin: 0 auto;
}

.cv-sections {
    margin-top: 3rem;
}

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

.cv-item {
    background: white;
    padding: 2rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cv-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.cv-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.project-links {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
}

.project-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.project-link:hover {
    color: #1e40af;
    text-decoration: underline;
}

.project-tags {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background-color: var(--bg-light);
    color: var(--text-color);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
}

/* Resources Section */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.resource-card {
    background: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.resource-card h3 {
    margin-bottom: 1rem;
}

.resource-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* Footer */
.footer {
    background-color: var(--text-color);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.footer-links {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 0.7;
}

/* Side Navigation Buttons */
.side-nav {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.side-nav-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: white;
    color: var(--text-color);
    padding: 1rem 1.5rem;
    border-radius: 2rem;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    font-weight: 500;
    white-space: nowrap;
}

.side-nav-btn:hover {
    transform: translateX(-5px);
    box-shadow: 0 15px 25px -5px rgba(0, 0, 0, 0.2);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.side-nav-icon {
    font-size: 1.5rem;
}

.side-nav-text {
    font-size: 1rem;
}

/* About Section Updates */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.125rem;
    line-height: 1.8;
    text-align: left;
}

.interests {
    margin-top: 2rem;
}

.interests h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.interests-list {
    list-style: none;
    padding-left: 0;
}

.interests-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.interests-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.contact-links {
    margin-top: 2rem;
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.contact-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    border: 2px solid var(--primary-color);
}

.contact-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* CV Page Styles */
.cv-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.cv-hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: white;
}

.cv-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cv-section {
    padding: 4rem 0;
}

.cv-section:nth-child(even) {
    background-color: var(--bg-light);
}

.cv-items {
    max-width: 900px;
    margin: 0 auto;
}

.cv-item {
    background: white;
    padding: 2rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cv-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.cv-item h3 {
    margin-bottom: 0.5rem;
}

.cv-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* Accordion Styles */
.accordion-container {
    max-width: 900px;
    margin: 0 auto;
}

.accordion-item {
    background: white;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.accordion-item:hover {
    box-shadow: var(--shadow-lg);
}

.accordion-item.active {
    box-shadow: var(--shadow-lg);
}

.accordion-header {
    width: 100%;
    padding: 1.5rem 2rem;
    background: white;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    transition: background-color 0.3s ease;
}

.accordion-header:hover {
    background-color: var(--bg-light);
}

.accordion-title {
    flex: 1;
}

.accordion-icon {
    font-size: 0.875rem;
    transition: transform 0.3s ease;
    color: var(--primary-color);
}

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

.accordion-item.active .accordion-content {
    max-height: 2000px;
}

.accordion-body {
    padding: 0 2rem 2rem 2rem;
}

.project-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.project-details {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-light);
    border-radius: 0.5rem;
    line-height: 1.8;
}

.project-details p {
    margin-bottom: 1rem;
}

.project-details ul,
.project-details ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.project-details li {
    margin-bottom: 0.5rem;
}

/* Timeline Styles */
.timeline-container {
    max-width: 900px;
    margin: 3rem auto;
    position: relative;
    padding: 2rem 0;
}

.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-content {
    width: 45%;
    background: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: auto;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
}

.timeline-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.timeline-period {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 500;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border: 3px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--primary-color), var(--shadow);
    z-index: 10;
}

.timeline-line {
    position: absolute;
    top: 50%;
    width: 8%;
    height: 2px;
    background: var(--primary-color);
    z-index: 5;
}

.timeline-item:nth-child(odd) .timeline-line {
    right: 45%;
    left: auto;
}

.timeline-item:nth-child(even) .timeline-line {
    left: 45%;
    right: auto;
}

/* Responsive Timeline */
@media (max-width: 768px) {
    .timeline-container::before {
        left: 1.5rem;
    }

    .timeline-item {
        flex-direction: row !important;
        padding-left: 3rem;
    }

    .timeline-content {
        width: 100%;
        margin: 0 !important;
    }

    .timeline-dot {
        left: 1.5rem;
        transform: translateX(-50%);
    }

    .timeline-line {
        display: none;
    }
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-links {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    h2 {
        font-size: 2rem;
    }

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

    .container {
        padding: 0 1rem;
    }

    section {
        padding: 3rem 0;
    }

    /* Side Navigation for Mobile */
    .side-nav {
        right: 1rem;
        top: auto;
        bottom: 2rem;
        transform: none;
        flex-direction: row;
    }

    .side-nav-btn {
        padding: 0.75rem 1rem;
        border-radius: 1.5rem;
    }

    .side-nav-text {
        display: none;
    }

    .side-nav-icon {
        font-size: 1.25rem;
    }

    .cv-hero h1 {
        font-size: 2rem;
    }

    .accordion-header {
        padding: 1rem 1.5rem;
        font-size: 1.125rem;
    }

    .accordion-body {
        padding: 0 1.5rem 1.5rem 1.5rem;
    }
}