:root {
    --bg-main: #ffffff;
    --bg-secondary: #f9f9f9;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --text-main: #111111;
    --text-secondary: #666666;
    --border-color: rgba(0, 0, 0, 0.08);
    --accent: #0066cc;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
    --bg-main: #0a0a0a;
    --bg-secondary: #111111;
    --bg-glass: rgba(10, 10, 10, 0.7);
    --text-main: #ffffff;
    --text-secondary: #888888;
    --border-color: rgba(255, 255, 255, 0.08);
    --accent: #2997ff;
    --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.6);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    overflow-x: hidden;
}

::selection {
    background: rgba(0, 102, 204, 0.2);
}

[data-theme="dark"] ::selection {
    background: rgba(41, 151, 255, 0.3);
}

/* Noise overlay for premium texture */
.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

[data-theme="dark"] .noise-overlay {
    opacity: 0.04;
}

/* Typography */
h1, h2, h3, h4, h5 {
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-fast);
}

.navbar.scrolled {
    padding: 12px 0;
    background-color: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo-placeholder {
    width: 40px;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.05em;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-main);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--border-color);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 24px;
    overflow: hidden;
}

.hero-content {
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 64px;
    text-align: left;
}

.hero-text {
    flex: 1;
    max-width: 650px;
}

.profile-photo-container {
    width: 280px;
    height: 280px;
    margin: 0;
    flex-shrink: 0;
    border-radius: 50%;
    padding: 4px;
    background: linear-gradient(135deg, var(--border-color) 0%, transparent 100%);
    position: relative;
}

.profile-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    border: 2px solid var(--bg-main);
    box-shadow: var(--shadow-soft);
    display: block;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 100px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    margin-bottom: 16px;
    background: linear-gradient(to right, var(--text-main), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 100%;
    margin: 0 0 48px 0;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 100px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--text-main);
    color: var(--bg-main);
    border: 1px solid var(--text-main);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .btn-primary:hover {
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.1);
}

.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
    transform: translateY(-2px);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-main);
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 102, 204, 0.05) 0%, rgba(255,255,255,0) 70%);
    z-index: 1;
    pointer-events: none;
}

[data-theme="dark"] .hero-glow {
    background: radial-gradient(circle, rgba(41, 151, 255, 0.08) 0%, rgba(10,10,10,0) 70%);
}

/* Sections */
.section {
    padding: 120px 24px;
}

.bg-subtle {
    background-color: var(--bg-secondary);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-label::before {
    content: '';
    display: block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border-color);
}

.section-heading {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: 64px;
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

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

.bento-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.bento-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all var(--transition-fast);
}

.bento-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-soft);
    border-color: var(--text-secondary);
}

.full-width {
    grid-column: 1 / -1;
}

.bento-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: block;
}

.bento-value {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

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

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.tag {
    font-size: 0.85rem;
    padding: 6px 12px;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    color: var(--text-secondary);
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.project-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-smooth);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.project-image-container {
    height: 280px;
    width: 100%;
    overflow: hidden;
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.project-image {
    width: 100%;
    height: 100%;
    transition: transform var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    font-weight: 700;
    color: rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .project-image {
    color: rgba(255, 255, 255, 0.15);
}

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

.gradient-bg-1 {
    background: linear-gradient(135deg, #e0c3fc 0%, #8ec5fc 100%);
}

.gradient-bg-2 {
    background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
}

[data-theme="dark"] .gradient-bg-1 {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

[data-theme="dark"] .gradient-bg-2 {
    background: linear-gradient(135deg, #434343 0%, #000000 100%);
}

.project-content {
    padding: 32px;
}

.project-badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.project-title {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 0.95rem;
}

.project-links {
    margin-top: 24px;
    display: flex;
    gap: 16px;
}

.link-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.link-btn svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

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

.link-btn:hover svg {
    transform: translate(2px, -2px);
}

.mt-4 {
    margin-top: 24px;
}

/* Experience */
.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 64px;
    flex-wrap: wrap;
    gap: 24px;
}

.timeline {
    position: relative;
    max-width: 800px;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 11px;
    width: 1px;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 48px;
    margin-bottom: 48px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: 4px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--bg-main);
    border: 2px solid var(--border-color);
    transition: all var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
    border-color: var(--text-main);
    background-color: var(--text-main);
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.timeline-role {
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.timeline-company {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.timeline-details {
    list-style-type: none;
    color: var(--text-secondary);
}

.timeline-details li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.timeline-details li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--border-color);
}

/* Contact */
.contact-container {
    max-width: 800px;
    text-align: center;
}

.contact-text {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 48px;
}

.contact-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: left;
    transition: all var(--transition-fast);
}

.contact-card:hover {
    transform: translateY(-4px);
    border-color: var(--text-secondary);
}

.contact-icon {
    font-size: 1.5rem;
}

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

.contact-value {
    font-weight: 500;
}

/* Footer */
footer {
    padding: 48px 24px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 24px;
}

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

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Impact Metrics */
.metrics-strip {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 64px 24px;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 32px;
}

.metric-item {
    text-align: center;
}

.metric-number {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--text-main), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.metric-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* Tech Stack Marquee */
.marquee-container {
    width: 100%;
    overflow: hidden;
    padding: 64px 0;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
    position: relative;
}

.marquee-container::before,
.marquee-container::after {
    content: '';
    position: absolute;
    top: 0;
    width: 150px;
    height: 100%;
    z-index: 2;
}

.marquee-container::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-main), transparent);
}

.marquee-container::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-main), transparent);
}

.marquee-content {
    display: inline-block;
    animation: marquee 40s linear infinite;
}

.marquee-item {
    display: inline-block;
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 48px;
    transition: color var(--transition-fast);
}

.marquee-item:hover {
    color: var(--text-main);
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* Floating Action Button */
.floating-action-button {
    position: fixed;
    bottom: 32px;
    right: 32px;
    background-color: var(--text-main);
    color: var(--bg-main);
    padding: 16px 24px;
    border-radius: 100px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    z-index: 1000;
    text-decoration: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.floating-action-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

[data-theme="dark"] .floating-action-button {
    box-shadow: 0 10px 30px rgba(255,255,255,0.1);
}

[data-theme="dark"] .floating-action-button:hover {
    box-shadow: 0 20px 40px rgba(255,255,255,0.2);
}

/* Responsive */
@media (max-width: 768px) {
    .section {
        padding: 80px 20px;
    }

    .nav-content {
        padding: 0 16px;
    }

    .nav-links {
        gap: 16px;
    }
    
    .nav-links a {
        font-size: 0.8rem;
    }

    .hero {
        padding: 100px 20px 60px;
    }
    
    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
        gap: 40px;
    }

    .hero-text {
        max-width: 100%;
    }

    .profile-photo-container {
        width: 160px;
        height: 160px;
        margin: 0 auto;
    }

    .hero-description {
        margin: 0 auto 32px auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .bento-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .experience-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}