/* Variáveis CSS para cores */
:root {
    --primary-color: #007bff; /* Azul */
    --secondary-color: #6c757d; /* Cinza */
    --background-color: #f8f9fa; /* Branco muito claro */
    --text-color: #343a40; /* Cinza escuro */
    --light-gray: #e9ecef;
    --white: #ffffff;
}

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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    scroll-behavior: smooth;
}

/* Cabeçalho fixo */
header {
    background-color: var(--white);
    color: var(--text-color);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Seções */
main {
    padding-top: 80px; /* Espaço para o cabeçalho fixo */
}

.section {
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--white);
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.section:nth-of-type(even) {
    background-color: var(--light-gray);
}

h2 {
    text-align: center;
    margin-bottom: 40px;
    color: var(--primary-color);
    font-size: 2.5rem;
}

/* Hero Section (Home) */
.hero {
    min-height: calc(100vh - 80px); /* Altura total da tela menos o cabeçalho */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: linear-gradient(to right, var(--primary-color), #0056b3);
    color: var(--white);
    padding: 20px;
    border-radius: 0;
    box-shadow: none;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 10px;
}

.hero .tagline {
    font-size: 1.8rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.navigation-buttons .btn {
    background-color: var(--white);
    color: var(--primary-color);
    padding: 12px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    margin: 10px;
    transition: background-color 0.3s ease, color 0.3s ease;
    display: inline-block;
}

.navigation-buttons .btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

/* Sobre Mim */
.about-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.profile-photo {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--primary-color);
    box-shadow: 0 0 15px rgba(0,0,0,0.2);
}

.about-content p {
    text-align: justify;
    max-width: 800px;
    font-size: 1.1rem;
}

/* Minha Carreira (Timeline/Cards) */
.timeline {
    display: flex;
    flex-direction: column;
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--primary-color);
    left: 50%;
    top: 0;
    bottom: 0;
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-item-content {
    width: 45%;
    background-color: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: relative;
}

.timeline-item-content::before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    top: 20px;
}

.timeline-item:nth-child(even) .timeline-item-content::before {
    border-left: 15px solid var(--white);
    right: -15px;
}

.timeline-item:nth-child(odd) .timeline-item-content::before {
    border-right: 15px solid var(--white);
    left: -15px;
}

.timeline-item-content h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-item-content p {
    font-size: 0.95rem;
}

.timeline-item-dot {
    width: 20px;
    height: 20px;
    background-color: var(--primary-color);
    border-radius: 50%;
    position: absolute;
    left: 50%;
    top: 25px;
    transform: translateX(-50%);
    z-index: 1;
    border: 3px solid var(--white);
}

/* Projetos (Grid) */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 25px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}

.project-card h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.project-card p {
    font-size: 0.95rem;
    margin-bottom: 15px;
    flex-grow: 1;
}

.project-card .language {
    font-style: italic;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.project-card a {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 0.9rem;
    align-self: flex-start;
    transition: background-color 0.3s ease;
}

.project-card a:hover {
    background-color: #0056b3;
}

/* Contato */
.contact-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.contact-links a {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1rem;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.contact-links a:hover {
    background-color: #0056b3;
    transform: translateY(-5px);
}

/* Rodapé */
footer {
    background-color: var(--text-color);
    color: var(--white);
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    font-size: 0.9rem;
}

.education-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.education-item {
    flex: 1 1 300px;
    background-color: #f9f9f9;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}

.certificate-img {
    max-width: 100%;
    height: auto;
    margin-top: 1rem;
    border-radius: 5px;
}

.certificates {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

/* Responsividade */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        padding: 10px 20px;
    }

    nav ul {
        margin-top: 10px;
        flex-wrap: wrap;
        justify-content: center;
    }

    nav ul li {
        margin: 5px 10px;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .hero .tagline {
        font-size: 1.4rem;
    }

    .navigation-buttons {
        flex-direction: column;
    }

    .navigation-buttons .btn {
        width: 80%;
        max-width: 300px;
    }

    .about-content {
        flex-direction: column;
    }

    .timeline::before {
        left: 20px;
        transform: translateX(0);
    }

    .timeline-item {
        flex-direction: column !important;
        align-items: flex-start;
    }

    .timeline-item-content {
        width: calc(100% - 60px);
        margin-left: 60px;
    }

    .timeline-item-content::before {
        border-left: none !important;
        border-right: 15px solid var(--white) !important;
        left: -15px !important;
    }

    .timeline-item-dot {
        left: 20px;
        transform: translateX(-50%);
    }

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

    .contact-links {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero .tagline {
        font-size: 1.2rem;
    }

    h2 {
        font-size: 2rem;
    }

    .section {
        padding: 40px 15px;
    }
}