:root {
    --bg: #050505;
    --surface: #0f0f0f;
    --border: #262626;
    --text-primary: #ededed;
    --text-secondary: #a1a1a1;
    --accent: #6366f1; /* Indigo */
    --accent-glow: rgba(99, 102, 241, 0.15);
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --container-width: 900px;
    --radius-sm: 4px;
    --radius-md: 8px;
}

/* Scroll Progress Bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(to right, var(--accent), #a78bfa);
    z-index: 1000;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

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

ul {
    list-style: none;
}

/* Utility */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-lg) 0;
}

/* Background Texture */
.background-grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    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)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: -1;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    height: 64px;
    display: flex;
    align-items: center;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.logo {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
}

.nav-menu {
    display: block;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 64px;
    position: relative;
    overflow: hidden;
}

.hero-layout {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: var(--spacing-lg);
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.hero-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-border-gradient {
    position: relative;
    padding: 8px;
    background: linear-gradient(135deg, var(--border), var(--accent));
    border-radius: 32px;
    z-index: 2;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.hero-avatar {
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: 24px;
    display: block;
    filter: contrast(1.05);
}

.hero-blob {
    position: absolute;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    z-index: 1;
    border-radius: 50%;
    filter: blur(40px);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 500;
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.04em;
    background: linear-gradient(to right, #fff, #888);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    font-weight: 400;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.btn {
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg);
}

.btn-primary:hover {
    background: #fff;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    border-color: var(--text-secondary);
    background: var(--surface);
}

/* Section Labels */
.section-label {
    display: block;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

/* About */
.about-content {
    max-width: 680px;
}

.about-content p {
    margin-bottom: var(--spacing-sm);
    font-size: 1.05rem;
    color: #ccc;
}

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

/* Skills */
.skills-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.skill-category h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-list span {
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: var(--surface);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}


.project-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.project-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tags span {
    font-size: 0.75rem;
    color: var(--accent);
    background: rgba(99, 102, 241, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Timeline (Experience & Education) */
.timeline {
    border-left: 1px solid var(--border);
    padding-left: var(--spacing-md);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-lg);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(var(--spacing-md) * -1 - 5px);
    top: 6px;
    width: 9px;
    height: 9px;
    background: var(--border);
    border-radius: 50%;
    transition: background 0.2s ease;
}

.timeline-item:hover::before {
    background: var(--accent);
}

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

.timeline-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    font-family: monospace;
}

.timeline-content h3 {
    font-size: 1.1rem;
    margin-bottom: 2px;
}

.company {
    color: var(--accent);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: 600px;
}

/* Certifications */
.cert-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.cert-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
    transition: background 0.2s ease;
}

.cert-list li:hover {
    background: var(--surface);
}

.cert-name {
    font-weight: 500;
}

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

/* Contact */
.contact-container {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.contact-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    transition: color 0.2s;
    font-size: 1.1rem;
}

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

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

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: var(--spacing-md) 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 5rem;
    }

    .hero-layout {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-md);
    }

    .hero-content {
        align-items: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-image-wrapper {
        order: -1;
        margin-bottom: var(--spacing-md);
    }

    .hero-avatar {
        max-width: 240px;
    }

    .mobile-menu-btn {
        display: block;
        background: none;
        border: none;
        color: var(--text-primary);
        font-size: 1.2rem;
        cursor: pointer;
        padding: 8px;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-menu.active {
        max-height: 300px;
    }

    .nav-links {
        flex-direction: column;
        padding: var(--spacing-sm) 0;
        gap: 0;
    }

    .nav-links li {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .nav-container {
        position: relative;
    }

    .cert-list li {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
}

/* Animations */
@keyframes blurIn {
    from { 
        opacity: 0; 
        filter: blur(20px); 
        transform: translateY(20px) scale(0.95); 
    }
    to { 
        opacity: 1; 
        filter: blur(0); 
        transform: translateY(0) scale(1); 
    }
}

.reveal {
    opacity: 0;
    /* Default state before animation */
}

.reveal.active {
    animation: blurIn 1s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.reveal-stagger {
    opacity: 0;
}

.reveal-stagger.active {
    animation: blurIn 1s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

/* Apple-like Text Gradient */
.apple-text-gradient {
    background: linear-gradient(135deg, #fff 0%, #888 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    /* Optional: Animate gradient position if we want shimmer */
    background-size: 120%;
    animation: shine 8s ease-in-out infinite alternate;
}

@keyframes shine {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}

/* Glassy Project Card */
.project-card {
    background: rgba(15, 15, 15, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px; /* More rounded */
    padding: 32px;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.project-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(800px circle at var(--mouse-x) var(--mouse-y), rgba(255,255,255,0.06), transparent 40%);
    z-index: 1;
    opacity: 0;
    transition: opacity 0.5s;
    pointer-events: none;
}

.project-card:hover::after {
    opacity: 1;
}

.project-card:hover {
    transform: translateY(-5px) scale(1.01);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

/* Bento Grid Layout for Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

@media (min-width: 768px) {
    .projects-grid .project-card:first-child {
        grid-column: span 2;
    }
}