:root {
    --primary-color: #0d47a1;   
    --secondary-color: #1565c0; 
    --accent-color: #ffc107;     
    --background-color: #f4f7f9; 
    --text-color: #333;          
    --light-text-color: #fdfdfd; 
    --card-background: #ffffff;  
    --footer-background: #263238; 
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    background-color: var(--background-color);
    color: var(--text-color);
}

main {
    padding-top: 60px; 
}

h1, h2, h3, h4 {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin-top: 0;
}

h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.2rem;
    border-bottom: 3px solid var(--accent-color);
    display: inline-block; 
    padding-bottom: 10px;
}

a {
    text-decoration: none;
    color: var(--secondary-color);
    transition: color 0.3s ease;
}

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

section {
    padding: 60px 20px;
    text-align: center; 
}


section:nth-of-type(odd) {
    background-color: var(--card-background);
}

nav {
    background-color: var(--primary-color);
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

nav a {
    display: block;
    padding: 18px 25px;
    color: var(--light-text-color);
    font-weight: bold;
    transition: background-color 0.3s ease;
}

nav a:hover {
    background-color: var(--secondary-color);
    color: var(--light-text-color);
}

header {
    text-align: center;
    padding: 120px 20px 60px;
    background-color: var(--primary-color);
    color: var(--light-text-color);
}

header img {
    border-radius: 50%;
    width: 150px;
    height: 150px;
    border: 5px solid var(--accent-color);
    margin-bottom: 20px;
}

header h1 {
    color: var(--light-text-color);
    font-size: 2.8rem;
    margin-bottom: 10px;
}

#intro {
    max-width: 700px;
    margin: 20px auto;
    font-size: 1.1rem;
    line-height: 1.7;
}

header h3 {
    font-weight: normal;
}

header a {
    color: var(--accent-color);
    font-weight: bold;
}

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


.education-item, .experience-item, .certification-item {
    background: var(--card-background);
    padding: 20px;
    margin: 15px auto;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.08);
    max-width: 800px;
    text-align: left;
}

.previsao {
    font-size: 0.9em;
    font-style: italic;
    color: #666;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.portfolio-card {
    background-color: var(--card-background);
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    padding: 25px;
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.portfolio-card:hover {
    transform: translateY(-10px); 
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
}

.portfolio-card h4 {
    color: var(--primary-color);
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.portfolio-card a {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: var(--light-text-color);
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.portfolio-card a:hover {
    background-color: var(--secondary-color);
}

.skills-list {
    display: flex;
    justify-content: center;
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

.skills-list ul {
    list-style-type: '✓ ';
    padding-left: 20px;
}

.skills-list li {
    margin-bottom: 10px;
}

footer {
    background-color: var(--footer-background);
    color: var(--light-text-color);
    padding: 40px 20px;
    text-align: center;
}

footer h2 {
    color: var(--light-text-color);
    border-bottom: 3px solid var(--accent-color);
}

.social-links a {
    color: var(--light-text-color);
    margin: 0 15px;
    font-size: 1.2rem;
    font-weight: bold;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--accent-color);
}

.direitos {
    margin-top: 20px;
    font-size: 0.9em;
    color: #ccc;
}

/*RESPONSIVIDADE*/
@media (max-width: 768px) {
    h2 {
        font-size: 1.8rem;
    }
    
    nav ul {
        flex-direction: column;
        text-align: center;
    }
    
    main {
        padding-top: 0;
    }

    header {
        padding-top: 20px;
    }

    nav {
        position: static;
    }

    .skills-list {
        flex-direction: column;
        gap: 0;
        align-items: center;
        text-align: center;
    }
    
    .skills-list ul {
        padding-left: 0;
        list-style-position: inside; 
    }
}

.portfolio-cta {
    display: inline-block; 
    margin-top: 40px;     
    padding: 15px 30px; 
    background-color: var(--primary-color); 
    color: var(--light-text-color); 
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 8px; 
    text-decoration: none;
    transition: all 0.3s ease; 
}

.portfolio-cta:hover {
    background-color: var(--secondary-color); 
    transform: translateY(-3px); 
    box-shadow: 0 6px 12px rgba(0,0,0,0.15); 
}