:root {
    --primary-color: #2d3436;
    --secondary-color: #0984e3;
    --background-color: #ffffff;
    --text-color: #2d3436;
    --spacing: 2rem;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: var(--spacing);
}

.profile-section {
    margin-bottom: 3rem;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

h2 {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.specialization {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.expertise {
    font-size: 1.1rem;
    color: var(--text-color);
    max-width: 600px;
    margin: 0 auto 1.5rem;
    line-height: 1.6;
}

.contact-button {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: transform 0.2s;
}

.contact-button:hover {
    transform: translateY(-2px);
}

section {
    margin-bottom: var(--spacing);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    text-align: center;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.cert-item {
    text-align: center;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 10px;
    transition: transform 0.2s;
}

.cert-item:hover {
    transform: translateY(-5px);
}

.cert-item i {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.timeline {
    display: grid;
    gap: 1.5rem;
}

.exp-item {
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 10px;
    transition: transform 0.2s;
}

.exp-item:hover {
    transform: translateY(-5px);
}

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

.company {
    font-weight: 500;
}

.period {
    color: #666;
    font-size: 0.9rem;
}

.about-text {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
    background-color: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
}

.about-text p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.expertise-list {
    list-style-type: none;
    margin: 1.5rem 0;
    padding: 0;
}

.expertise-list li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
}

.expertise-list li::before {
    content: "•";
    color: var(--secondary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

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