/* Modern Typography & Variables */
:root {
    --primary-green: #4CAF50;
    --dark-green: #45a049;
    --light-green: #81C784;
    --dark-bg: #121212;
    --card-bg: #1e1e1e;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-accent: #ffffff;
    --border-color: #333;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 15px rgba(0, 0, 0, 0.4);
    --transition: all 0.3s ease;
    --border-radius: 12px;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--dark-green) 100%);
    color: var(--text-accent);
    text-align: center;
    padding: 2rem 1rem;
    box-shadow: var(--shadow);
    position: relative;
    z-index: 100;
}

header h1 {
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-accent);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    margin-bottom: 1.5rem;
}

/* Navigation Styles */
nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    max-width: 100%;
    margin: 0 auto;
}

nav ul li {
    flex: 0 0 auto;
}

nav ul li a {
    display: block;
    text-decoration: none;
    color: var(--text-accent);
    font-weight: 600;
    padding: 0.75rem 1.25rem;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-size: 0.95rem;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    white-space: nowrap;
}

nav ul li a:hover,
nav ul li a:focus {
    background: rgba(0,0,0,0.2);
    border-color: var(--text-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

/* Main Content */
main {
    flex: 1;
    padding: 3rem 1rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Hero Section */
.hero-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
    margin-bottom: 2rem;
    text-align: center;
}

.photo-container {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.profile-photo {
    width: clamp(200px, 30vw, 350px);
    height: clamp(200px, 30vw, 350px);
    border-radius: 25%;
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(76, 175, 80, 0.3);
    transition: var(--transition);
    border: 4px solid var(--primary-green);
}

.profile-photo:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 40px rgba(76, 175, 80, 0.4);
}

.intro-content {
    padding: 1rem;
}

.welcome-message {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--primary-green);
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-green), var(--light-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.intro-text {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.quick-stats {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: 1.5rem 1rem;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    min-width: 120px;
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-green);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-green);
    margin-bottom: 0.5rem;
}

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

/* Section Headers */
h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--primary-green);
    margin-bottom: 2rem;
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-green), var(--light-green));
    border-radius: 2px;
}

h3 {
    color: var(--primary-green);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

/* Card Styles */
.profile-card, 
.education-card, 
.experience-card, 
.project-card, 
.cert-card,
.contact-card,
.activity-card,
.spec-card,
.skill-category {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.profile-card:hover, 
.education-card:hover, 
.experience-card:hover, 
.project-card:hover, 
.cert-card:hover,
.contact-card:hover,
.activity-card:hover,
.spec-card:hover,
.skill-category:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-green);
}

/* Profile Section */
.profile-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
}

.profile-content {
    max-width: 800px;
    margin: 0 auto;
}

.profile-card p {
    margin-bottom: 1.5rem;
    font-size: 1rem;
    line-height: 1.7;
}

.interests-section {
    margin-top: 2rem;
}

.interest-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

.interest-tags .tag {
    background: linear-gradient(135deg, var(--primary-green), var(--light-green));
    color: var(--text-accent);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Education Section */
.education-section {
    max-width: 900px;
    margin: 0 auto;
}

.education-card.current {
    border-left: 4px solid var(--primary-green);
}

.education-card.completed {
    border-left: 4px solid var(--text-secondary);
}

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

.degree-title {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.timeline, .cert-date {
    background: var(--primary-green);
    color: var(--text-accent);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
}

.gpa-section {
    margin-bottom: 1rem;
}

.gpa {
    color: var(--primary-green);
    font-weight: 600;
    font-size: 1.1rem;
}

.coursework {
    margin-top: 1rem;
}

.coursework ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.5rem;
    margin-top: 0.5rem;
    padding-left: 0;
    list-style: none;
}

.coursework li {
    background: var(--dark-bg);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.extracurriculars-section {
    margin-top: 3rem;
}

/* Skills Section */
.skills-section {
    max-width: 1000px;
    margin: 0 auto;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.skill-tags, .tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.skill-tag, .tech, .tag {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.skill-tag.primary, .tech {
    background: var(--primary-green);
    color: var(--text-accent);
}

.skill-tag.secondary, .tag {
    background: var(--border-color);
    color: var(--text-primary);
}

.skill-tag:hover, .tech:hover, .tag:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow);
}

.specializations {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 3rem;
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.spec-card {
    background: var(--dark-bg);
    padding: 1.5rem;
}

/* Experience Section */
.experience-section {
    max-width: 900px;
    margin: 0 auto;
}

.experience-timeline {
    position: relative;
    padding-left: 2rem;
}

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

.experience-card {
    position: relative;
    margin-left: 2rem;
}

.experience-card::before {
    content: '';
    position: absolute;
    left: -3rem;
    top: 2rem;
    width: 12px;
    height: 12px;
    background: var(--primary-green);
    border-radius: 50%;
    border: 3px solid var(--dark-bg);
}

.experience-card.current::before {
    background: var(--light-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(76, 175, 80, 0); }
    100% { box-shadow: 0 0 0 0 rgba(76, 175, 80, 0); }
}

.job-header, .project-header, .cert-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.company {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 1rem;
}

.project-tags, .cert-tags {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* Projects Section */
.projects-section {
    max-width: 1000px;
    margin: 0 auto;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card.featured {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--card-bg) 0%, #1a1a1a 100%);
    border: 2px solid var(--primary-green);
}

.project-description {
    margin-bottom: 1.5rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.project-features {
    margin-bottom: 1.5rem;
}

.project-features ul {
    margin-top: 1rem;
    padding-left: 1.5rem;
}

.project-features li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* Certifications Section */
.certifications-section {
    max-width: 900px;
    margin: 0 auto;
}

.certifications-grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 3rem;
}

.cert-card.recent {
    border: 2px solid var(--primary-green);
    background: linear-gradient(135deg, var(--card-bg) 0%, #1a1a1a 100%);
}

.cert-issuer {
    color: var(--primary-green);
    font-weight: 600;
    margin-bottom: 1rem;
}

.cert-details ul {
    margin-top: 1rem;
    padding-left: 1.5rem;
}

.cert-details li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.certification-summary {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 3rem;
}

.summary-stats {
    display: flex;
    justify-content: space-around;
    margin: 2rem 0;
    flex-wrap: wrap;
    gap: 1rem;
}

.focus-areas {
    margin-top: 2rem;
}

.focus-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
    justify-content: center;
}

.focus-tag {
    background: linear-gradient(135deg, var(--primary-green), var(--light-green));
    color: var(--text-accent);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    transition: var(--transition);
}

.focus-tag:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow);
}

/* Contact Section */
.contact-section {
    max-width: 900px;
    margin: 0 auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-card {
    text-align: center;
    position: relative;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-green), var(--light-green));
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.contact-card h3 {
    color: var(--primary-green);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.contact-card p {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.contact-note {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
}

.contact-cta {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
}

.contact-cta h3 {
    color: var(--primary-green);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.contact-cta p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-button {
    padding: 0.875rem 2rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
    display: inline-block;
}

.cta-button.primary {
    background: var(--primary-green);
    color: var(--text-accent);
}

.cta-button.primary:hover {
    background: var(--dark-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.cta-button.secondary {
    background: transparent;
    color: var(--primary-green);
    border-color: var(--primary-green);
}

.cta-button.secondary:hover {
    background: var(--primary-green);
    color: var(--text-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.availability-status {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
}

.status-card {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-top: 1rem;
}

.status-indicator {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.status-indicator.available {
    background: #4CAF50;
    animation: pulse-status 2s infinite;
}

@keyframes pulse-status {
    0% { box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(76, 175, 80, 0); }
    100% { box-shadow: 0 0 0 0 rgba(76, 175, 80, 0); }
}

.status-info h4 {
    color: var(--primary-green);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.status-info p {
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--dark-green) 100%);
    color: var(--text-accent);
    margin-top: auto;
}

.copyright {
    font-weight: 600;
    font-size: 1rem;
}

/* Links */
a {
    color: var(--primary-green);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--light-green);
    text-decoration: underline;
}

/* Lists */
ul {
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* Images */
img {
    max-width: 100%;
    height: auto;
}

/* Focus Styles for Accessibility */
*:focus {
    outline: 2px solid var(--primary-green);
    outline-offset: 2px;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --border-radius: 8px;
    }
    
    header {
        padding: 1.5rem 1rem;
    }
    
    nav ul {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
        max-width: 400px;
        margin: 0 auto;
    }
    
    nav ul li a {
        padding: 0.75rem 0.5rem;
        font-size: 0.9rem;
        text-align: center;
    }
    
    main {
        padding: 2rem 1rem;
    }
    
    .hero-section {
        gap: 2rem;
    }
    
    .quick-stats {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .stat-item {
        width: 100%;
        max-width: 200px;
    }
    
    .degree-header, 
    .job-header, 
    .project-header, 
    .cert-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .timeline, 
    .cert-date {
        align-self: flex-start;
    }
    
    .summary-stats {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .experience-timeline {
        padding-left: 1rem;
    }
    
    .experience-card {
        margin-left: 1rem;
    }
    
    .experience-card::before {
        left: -1.5rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
    
    .status-card {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
        align-items: center;
    }
    
    .status-indicator {
        margin-top: 0;
    }
    
    .focus-tags, 
    .interest-tags {
        justify-content: center;
    }
    
    .coursework ul {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    nav ul {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .skill-tags, 
    .tech-stack, 
    .project-tags, 
    .cert-tags {
        gap: 0.25rem;
    }
    
    .skill-tag, 
    .tech, 
    .tag {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .focus-tags {
        gap: 0.5rem;
    }
    
    .focus-tag {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    .contact-icon {
        font-size: 2.5rem;
    }
}

/* Large screens */
@media (min-width: 1024px) {
    .hero-section {
        grid-template-columns: 1fr 2fr;
        text-align: left;
    }
    
    .profile-section {
        grid-template-columns: auto 1fr;
        text-align: left;
        gap: 3rem;
        align-items: flex-start;
    }
    
    .intro-content {
        padding: 2rem;
    }
    
    .intro-text {
        margin-left: 0;
    }
    
    .quick-stats {
        justify-content: flex-start;
    }
    
    .interest-tags {
        justify-content: flex-start;
    }
}

/* Print styles */
@media print {
    header, footer {
        background: none !important;
        color: black !important;
        box-shadow: none !important;
    }
    
    nav {
        display: none;
    }
    
    .profile-photo {
        border: 2px solid #333 !important;
        box-shadow: none !important;
    }
    
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
    }
}