* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    line-height: 1.6;
    color: #333;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

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

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
}

.nav-links a:hover {
    color: #3498db;
}

#hero {
    height: 100vh;
    background-color: #ecf0f1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 2rem;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.hero-content p {
    font-size: 1.2rem;
    color: #7f8c8d;
}

.hero-image {
    max-width: 100%;
    height: auto;
    margin-top: 2rem;
    border-radius: 10px;
    max-height: 400px;
}

@media (min-width: 768px) {
    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
        max-width: 80%;
    }
    
    .hero-image {
        max-width: 60%;
    }
}

section {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

section h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: #2c3e50;
}

#about {
    background-color: white;
    text-align: center;
    margin: 5rem auto;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: #3498db;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
    opacity: 0.3;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
    text-align: left;
}

.timeline-content {
    padding: 20px;
    background-color: #f9f9f9;
    position: relative;
    border-radius: 6px;
    max-width: 350px;
}

.timeline-content h3 {
    margin-top: 0;
    color: #2c3e50;
    font-size: 1.5rem;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 26px;
    height: 26px;
    right: -13px;
    background-color: white;
    border: 4px solid #3498db;
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:nth-child(odd)::after {
    right: -13px;
    left: auto;
}

.timeline-item:nth-child(even)::after {
    left: -13px;
    right: auto;
}

#projects {
    background-color: #ecf0f1;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: white;
    padding: 1.5rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.project-card p {
    margin-bottom: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 3px;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #2980b9;
}

footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 3rem 2rem;
}

footer h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

footer p {
    margin-bottom: 0.5rem;
}

footer a {
    color: #3498db;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

.dog-image {
    border-radius: 50%;
    width: 150px;
    height: 150px;
    object-fit: cover;
    margin-top: 1rem;
}