:root {
    --primary-color: #4a90e2;
    --secondary-color: #2c3e50;
    --background-color: #f5f8fa;
    --text-color: #333;
    --light-blue: #ecf0f1;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    background-color: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    padding: 1rem 0;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav h1 {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.nav-links a {
    color: var(--secondary-color);
    text-decoration: none;
    margin-left: 2rem;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background-color: var(--light-blue);
    text-align: center;
}

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

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 2rem;
    border: 4px solid white;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.hero h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* About Section */
.about {
    padding: 4rem 0;
    background-color: white;
}

.about h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.about p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.secondary-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* Experience Section */
.experience {
    padding: 4rem 0;
    background-color: var(--light-blue);
}

.experience h2 {
    color: var(--primary-color);
    margin-bottom: 3rem;
}

.experience-item {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.experience-item h3 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.company {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.experience-item ul {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.achievements h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.timeline-item {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Skills Section */
.skills {
    padding: 4rem 0;
    background-color: white;
}

.skills h2 {
    color: var(--primary-color);
    margin-bottom: 3rem;
}

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

.skill-category {
    background-color: var(--light-blue);
    padding: 2rem;
    border-radius: 8px;
}

.skill-category h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.skill-category li::before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* Contact Section */
.contact {
    padding: 4rem 0;
    background-color: var(--light-blue);
}

.contact h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.contact-info {
    text-align: center;
}

.contact-info p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.contact-info i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    nav .container {
        flex-direction: column;
        text-align: center;
    }

    .nav-links {
        margin-top: 1rem;
    }

    .nav-links a {
        margin: 0 1rem;
        font-size: 0.9rem;
    }

    .hero {
        padding: 6rem 0 3rem;
    }

    .profile-image {
        width: 150px;
        height: 150px;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }
}