:root {
    --bg-color: #0d0e12;
    --surface-color: #14151b;
    --surface-hover: #1a1c24;
    --border-color: #262936;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --container-width: 800px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body.light-mode {
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --surface-hover: #f1f5f9;
    --border-color: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent-color: #2563eb;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem 0;
    margin-bottom: 5rem;
    position: relative;
}

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

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

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

.nav-actions {
    position: absolute;
    right: 0;
    display: flex;
    gap: 0.75rem;
}

.icon-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.icon-btn:hover {
    color: var(--text-primary);
    background-color: var(--surface-hover);
    border-color: rgba(255,255,255,0.2);
}

/* Hero Section */
.hero {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 3rem;
    margin-bottom: 5rem;
}

.hero-content {
    flex: 1;
}


.hero-title {
    font-family: var(--font-heading);
    font-size: 4.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.wave {
    display: inline-block;
    animation: wave 2.5s infinite;
    transform-origin: 70% 70%;
}

@keyframes wave {
    0% { transform: rotate(0deg); }
    10% { transform: rotate(14deg); }
    20% { transform: rotate(-8deg); }
    30% { transform: rotate(14deg); }
    40% { transform: rotate(-4deg); }
    50% { transform: rotate(10deg); }
    60% { transform: rotate(0deg); }
    100% { transform: rotate(0deg); }
}

.hero-subtitle {
    font-size: 1.15rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-description {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.05rem;
    line-height: 1.7;
    max-width: 450px;
}

.hero-escalation {
    font-size: 0.95rem;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-escalation strong {
    color: var(--text-primary);
    font-weight: 600;
}

.dim-text {
    color: var(--text-secondary);
}

.link {
    text-decoration: underline;
    text-underline-offset: 4px;
    color: var(--text-secondary);
}

.link:hover {
    color: var(--text-primary);
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.btn-primary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1.25rem;
    border-radius: 24px;
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.btn-primary:hover {
    background-color: var(--surface-color);
    border-color: rgba(255,255,255,0.2);
}

.icon-link {
    color: var(--text-secondary);
    font-size: 1.3rem;
}

.icon-link:hover {
    color: var(--text-primary);
}

.hero-image {
    flex-shrink: 0;
    width: 200px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 0.5rem;
}

.image-wrapper {
    position: relative;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(59,130,246,0.3), rgba(139,92,246,0.3));
    padding: 4px;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275),
                box-shadow 0.4s ease;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.image-wrapper:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 40px rgba(59,130,246,0.2);
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: 50%;
    display: block;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.image-wrapper:hover img {
    transform: scale(1.02);
}

/* Tabs Section */
.experience-section {
    margin-bottom: 5rem;
}


.timeline-item {
    display: flex;
    gap: 1.25rem;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: all 0.2s;
}

.timeline-item:hover {
    background-color: var(--surface-color);
    border-color: rgba(255,255,255,0.15);
}

.timeline-logo {
    flex-shrink: 0;
}

.logo-circle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.3rem;
    color: white;
}

.bg-red { background-color: #ef4444; }
.bg-red-white { 
    background: linear-gradient(135deg, #ef4444 50%, white 50%); 
    color: #ef4444; 
    border: 2px solid #ef4444;
}

.timeline-details {
    flex: 1;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.3rem;
}

.timeline-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.timeline-header .date {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.degree {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.achievements {
    list-style-position: inside;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
}

.achievements li {
    margin-bottom: 0.4rem;
}

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

.tag {
    background-color: var(--text-primary);
    color: var(--bg-color);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Section Header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 2rem;
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.view-more {
    font-size: 0.95rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.view-more:hover {
    color: var(--text-primary);
}

/* Projects Section */
.projects-section {
    margin-bottom: 5rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.project-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255,255,255,0.2);
}

.project-img {
    width: 100%;
    aspect-ratio: 16/9;
    background-color: var(--surface-hover);
    overflow: hidden;
    position: relative;
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-img img {
    transform: scale(1.05);
}

.project-info {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.project-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    font-family: var(--font-sans);
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex: 1;
    line-height: 1.6;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-tag {
    background-color: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.project-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--surface-hover);
    border-color: rgba(255,255,255,0.2);
}

/* Footer */
footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 3rem;
}

.footer-links {
    display: flex;
    gap: 1.25rem;
}

.footer-links a {
    font-size: 1.2rem;
}

.footer-links a:hover {
    color: var(--text-primary);
}



/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1.5rem;
        margin-bottom: 3rem;
    }
    
    .nav-actions {
        position: static;
    }
    
    .hero {
        flex-direction: column-reverse;
        align-items: center;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-image {
        margin-bottom: 1rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}