:root {
    --bg-color: #020617;
    --bg-secondary: #0b1220;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --accent-color: #3b82f6;
    --accent-gradient: linear-gradient(135deg, #2563eb 0%, #4f46e5 50%, #06b6d4 100%);
    --card-bg: rgba(15, 23, 42, 0.95);
    --border-color: rgba(148, 163, 184, 0.25);
    --container-width: 1200px;
    --header-height: 80px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(56, 189, 248, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(129, 140, 248, 0.1) 0%, transparent 20%);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.1;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 3rem;
    text-align: center;
}

h2 span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

h4 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

/* Header & Nav */
header {
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
}

header .container {
    max-width: 100%;
    padding: 0 4rem; /* Increased padding */
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    padding-right: 20px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: var(--transition);
}

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

.nav-links a:hover::after {
    width: 100%;
}

/* Hamburger */
.hamburger {
    display: none;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 6px 0;
    transition: var(--transition);
}

/* Hero Section */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    position: relative;
}

.hero-content {
    max-width: 1200px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 100px;
    gap: 4rem;
}

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

.hero-image {
    flex: 0 0 250px;
    position: relative;
    display: flex;
    justify-content: center;
}

.hero-image img {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    border: 4px solid rgba(56, 189, 248, 0.3);
    box-shadow: 0 0 40px rgba(56, 189, 248, 0.2);
    object-fit: cover;
    object-position: top;
}

.highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block; /* Make name break to new line if needed or stand out */
    margin-top: 0.5rem;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 400;
}

.summary {
    font-size: 1.25rem;
    max-width: 700px;
    line-height: 1.6;
    margin-bottom: 3rem;
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn.primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 4px 14px 0 rgba(56, 189, 248, 0.39);
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(56, 189, 248, 0.23);
}

.btn.secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn.secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Sections General */
section {
    padding: 8rem 0;
}

/* Cards (Experience, Projects, Education) */
.timeline-content, .project-card, .education-card, .skill-category {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    transition: var(--transition);
    backdrop-filter: blur(5px);
}

.timeline-content:hover, .project-card:hover, .education-card:hover, .skill-category:hover {
    transform: translateY(-5px);
    border-color: rgba(56, 189, 248, 0.3);
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
}

/* Experience Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-color), transparent);
}

.timeline-item {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 4rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -5px;
    top: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--bg-color);
    border: 2px solid var(--accent-color);
    z-index: 2;
}

.timeline-date {
    font-size: 0.875rem;
    color: var(--accent-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.timeline-content ul {
    list-style: none;
    margin-top: 1.5rem;
}

.timeline-content li {
    margin-bottom: 1rem;
    position: relative;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

.timeline-content li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

/* Projects */
.project-card {
    max-width: 900px;
    margin: 0 auto;
    text-align: left;
    display: grid;
    gap: 1.5rem;
}

.project-card h3 {
    font-size: 2rem;
}

.project-description {
    font-size: 1.1rem;
    max-width: 600px;
}

/* Education */
.education-card {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.skill-category h3 {
    text-align: center;
    margin-bottom: 2rem;
}

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

.tags span {
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-color);
    padding: 0.5rem 1.25rem;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(56, 189, 248, 0.2);
    transition: var(--transition);
}

.tags span:hover {
    background: var(--accent-color);
    color: var(--bg-color);
}

/* Contact */
.contact-info {
    display: grid;
    gap: 1.5rem;
    justify-content: center;
    text-align: center;
}

.contact-item {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.contact-item a {
    color: var(--text-primary);
    border-bottom: 1px solid var(--accent-color);
}

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

/* Footer */
footer {
    padding: 4rem 0;
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
        gap: 3rem;
    }

    .hero-text {
        margin: 0 auto;
    }

    .hero-image {
        flex: 0 0 auto;
        width: 100%;
    }

    .hero-image img {
        width: 220px;
        height: 220px;
    }

    .summary {
        margin-left: auto;
        margin-right: auto;
    }

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 100%;
        background-color: var(--bg-color);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: var(--transition);
        z-index: 1000;
    }

    .nav-links.active {
        right: 0;
    }

    .hamburger {
        display: block;
        z-index: 1001;
        order: -1; /* Move hamburger to the left */
        padding-right: 2rem;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
        background-color: var(--text-primary);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
        background-color: var(--text-primary);
    }
    
    .timeline::before {
        left: 0;
    }
    
    .timeline-item {
        padding-left: 2rem;
    }

    h1 {
        font-size: 2.5rem;
    }

    .project-card {
        text-align: center;
        justify-items: center;
    }
}