:root {
    --primary-color: #2563eb;
    --secondary-color: #3b82f6;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem 0;
    margin-bottom: 3rem;
}

.profile-header {
    text-align: center;
    padding: 2rem 0;
}

.avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    border: 4px solid white;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 1rem;
}

.social-icons {
    margin-top: 1rem;
}

.social-icons a {
    color: white;
    font-size: 1.5rem;
    margin: 0 0.5rem;
    transition: transform 0.3s ease;
}

.social-icons a:hover {
    transform: translateY(-3px);
}

nav {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem 0;
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

nav a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.section {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.section h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 0.5rem;
    display: inline-block;
}

.education-item, .experience-item {
    padding: 1.5rem;
    border-radius: 8px;
    background: var(--bg-secondary);
    margin-bottom: 1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.education-item:hover, .experience-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.item-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

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

.item-subtitle {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 0.5rem;
}

.item-gpa {
    color: #10b981;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.courses {
    background: white;
    padding: 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.courses strong {
    color: var(--text-primary);
}

footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    margin-top: 3rem;
}

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

    .profile-header h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .section {
        padding: 1.5rem;
    }
}