/* ============================================= */
/* VARIÁVEIS GLOBAIS E RESET */
/* ============================================= */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #333;
    --text-light: #7f8c8d;
    --white: #fff;
    --gray-light: #f5f5f5;
    --gray-medium: #e0e0e0;
    --font-main: 'Open Sans', sans-serif;
    --font-heading: 'Montserrat', sans-serif;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

p {
    margin-bottom: 1.5rem;
}

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--secondary-color);
    color: var(--white);
    border-radius: 4px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
    font-family: var(--font-heading);
}

.btn:hover {
    background-color: var(--accent-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--secondary-color);
    color: var(--secondary-color);
}

.btn-outline:hover {
    background-color: var(--secondary-color);
    color: var(--white);
}

.section-padding {
    padding: 5rem 0;
}

.text-center {
    text-align: center;
}

/* ============================================= */
/* HEADER & NAVEGAÇÃO */
/* ============================================= */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.header.scroll-up {
    transform: translateY(0);
}

.header.scroll-down {
    transform: translateY(-100%);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
    margin-right: 1rem;
}

.logo h1 {
    font-size: 1.5rem;
    margin-bottom: 0;
    color: var(--primary-color);
}

.nav ul {
    display: flex;
}

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

.nav a {
    color: var(--dark-color);
    font-weight: 600;
    position: relative;
    padding: 0.5rem 0;
}

.nav a.active {
    color: var(--secondary-color);
}

.nav a.active::after,
.nav a:hover::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--secondary-color);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--dark-color);
    position: relative;
    transition: var(--transition);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: var(--dark-color);
    transition: var(--transition);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* ============================================= */
/* HERO SECTION */
/* ============================================= */
.hero {
    background: linear-gradient(rgba(44, 62, 80, 0.8), rgba(44, 62, 80, 0.8)), url('../img/banner.jpg') no-repeat center center/cover;
    color: var(--white);
    padding: 10rem 0 5rem;
    text-align: center;
    margin-top: 72px;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--white);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ============================================= */
/* PAGE HEADER (PARA PÁGINAS INTERNAS) */
/* ============================================= */
.page-header {
    background: linear-gradient(rgba(44, 62, 80, 0.8), rgba(44, 62, 80, 0.8)), url('../img/banner.jpg') no-repeat center center/cover;
    color: var(--white);
    padding: 8rem 0 4rem;
    text-align: center;
    margin-top: 72px;
}

.page-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* ============================================= */
/* ABOUT SECTION */
/* ============================================= */
.about {
    padding: 5rem 0;
    background-color: var(--light-color);
}

.about h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.pillars {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-top: 3rem;
    gap: 2rem;
}

.pillar {
    flex: 1;
    min-width: 250px;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
}

.pillar:hover {
    transform: translateY(-10px);
}

.pillar i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.pillar h3 {
    margin-bottom: 1rem;
}

/* ============================================= */
/* RESEARCH SECTION */
/* ============================================= */
.research {
    padding: 5rem 0;
}

.research h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.research-highlights {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-top: 3rem;
    gap: 2rem;
}

.research-highlights article {
    flex: 1;
    min-width: 300px;
    padding: 2rem;
    background-color: var(--light-color);
    border-radius: 8px;
    transition: var(--transition);
}

.research-highlights article:hover {
    transform: translateY(-5px);
}

.research-highlights article h3 {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.research-highlights ul {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.research-highlights li {
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.research-highlights li::before {
    content: '•';
    color: var(--accent-color);
    position: absolute;
    left: 0;
}

/* ============================================= */
/* TEAM SECTION */
/* ============================================= */
.team {
    padding: 5rem 0;
    background-color: var(--light-color);
}

.team h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.team-member {
    display: flex;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-5px);
}

.team-member img {
    width: 250px;
    height: 250px;
    object-fit: cover;
}

.member-info {
    padding: 2rem;
}

.member-info h3 {
    color: var(--secondary-color);
}

.member-info .title {
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

/* ============================================= */
/* ABOUT RESEARCH PAGE */
/* ============================================= */
.about-research {
    padding: 4rem 0;
}

.about-research .container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.research-details {
    flex: 2;
    min-width: 300px;
}

.researcher-profile {
    flex: 1;
    min-width: 300px;
}

.research-objectives {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 2rem 0;
}

.objective {
    flex: 1;
    min-width: 250px;
    padding: 1.5rem;
    background-color: var(--light-color);
    border-radius: 8px;
    transition: var(--transition);
}

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

.objective i {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.objective h4 {
    color: var(--primary-color);
}

.profile-card {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: var(--transition);
}

.profile-card:hover {
    transform: translateY(-5px);
}

.profile-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.profile-card .title {
    color: var(--accent-color);
    font-weight: 600;
}

.bio, .academic-info {
    padding: 0 1.5rem 1.5rem;
}

.academic-info {
    margin-top: 1.5rem;
}

.academic-info ul {
    margin-top: 0.5rem;
}

.academic-info li {
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
}

.methodology {
    padding: 4rem 0;
    background-color: var(--light-color);
}

.method-steps {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 2rem;
}

.step {
    flex: 1;
    min-width: 200px;
    padding: 1.5rem;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    position: relative;
    transition: var(--transition);
}

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

.step-number {
    position: absolute;
    top: -15px;
    left: -15px;
    width: 40px;
    height: 40px;
    background-color: var(--accent-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.partners {
    padding: 4rem 0;
    text-align: center;
}

.partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.partner {
    flex: 1;
    min-width: 150px;
    padding: 1.5rem;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.partner i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

/* ============================================= */
/* ARTICLES PAGE */
/* ============================================= */
.articles-section {
    padding: 4rem 0;
}

.articles-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    background-color: var(--light-color);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-heading);
}

.filter-btn.active, .filter-btn:hover {
    background-color: var(--secondary-color);
    color: var(--white);
}

.articles-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.article-card {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    transition: var(--transition);
}

.article-card:hover {
    transform: translateY(-5px);
}

.article-date {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.article-excerpt {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.featured-article {
    margin-bottom: 4rem;
}

.featured-card {
    display: flex;
    flex-wrap: wrap;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    overflow: hidden;
    margin-top: 1.5rem;
    transition: var(--transition);
}

.featured-card:hover {
    transform: translateY(-5px);
}

.featured-image {
    flex: 1;
    min-width: 300px;
}

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

.featured-content {
    flex: 2;
    min-width: 300px;
    padding: 2rem;
}

.meta {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.research-repositories {
    margin-top: 4rem;
}

.repositories-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.5rem;
}

.repository {
    flex: 1;
    min-width: 200px;
    padding: 1rem;
    background-color: var(--light-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.repository:hover {
    background-color: var(--secondary-color);
    color: var(--white);
}

.repository i {
    font-size: 0.9rem;
}

.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2rem;
}

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

/* ============================================= */
/* CONTACT PAGE */
/* ============================================= */
.contact-section {
    padding: 4rem 0;
}

.contact-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 4rem;
}

.contact-form {
    flex: 2;
    min-width: 300px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--gray-medium);
    border-radius: 4px;
    font-family: var(--font-main);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.info-item {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.info-item i {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

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

.office-hours {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--light-color);
    border-radius: 8px;
}

.contact-map {
    margin-top: 2rem;
}

.map-container {
    margin-top: 1.5rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.map-container iframe {
    width: 100%;
    display: block;
    border: none;
}

/* ============================================= */
/* FOOTER */
/* ============================================= */
.footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 3rem;
}

.footer-section {
    flex: 1;
    min-width: 250px;
    margin: 1rem;
}

.footer-section h3 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section a {
    color: var(--light-color);
}

.footer-section a:hover {
    color: var(--secondary-color);
}

.footer-section p {
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
}

.footer-section i {
    margin-right: 0.8rem;
    color: var(--secondary-color);
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: var(--transition);
}

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

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: var(--text-light);
}

.copyright p:first-child {
    margin-bottom: 0.5rem;
}

/* ============================================= */
/* RESPONSIVIDADE */
/* ============================================= */
@media (max-width: 992px) {
    .pillar {
        min-width: calc(50% - 2rem);
    }
    
    .team-member {
        flex-direction: column;
    }
    
    .team-member img {
        width: 100%;
        height: auto;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        clip-path: circle(0px at 90% -10%);
        transition: all 0.5s ease-out;
        pointer-events: none;
    }
    
    .nav.active {
        clip-path: circle(1000px at 90% -10%);
        pointer-events: all;
    }
    
    .nav ul {
        flex-direction: column;
        padding: 2rem;
    }
    
    .nav li {
        margin: 1rem 0;
    }
    
    .hamburger.active {
        transform: rotate(45deg);
    }
    
    .hamburger.active::before {
        transform: rotate(90deg);
        top: 0;
    }
    
    .hamburger.active::after {
        opacity: 0;
    }
    
    .hero, .page-header {
        padding: 8rem 0 4rem;
    }
    
    .hero h2, .page-header h2 {
        font-size: 2rem;
    }
    
    .pillar {
        min-width: 100%;
    }
    
    .research-highlights article {
        min-width: 100%;
    }
    
    .research-details, .researcher-profile {
        padding-right: 0;
    }
    
    .featured-card {
        flex-direction: column;
    }
    
    .featured-image {
        min-height: 200px;
    }
}

@media (max-width: 576px) {
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .hero, .page-header {
        padding: 7rem 0 3rem;
    }
    
    .hero h2, .page-header h2 {
        font-size: 1.8rem;
    }
    
    .hero p, .page-header p {
        font-size: 1rem;
    }
    
    .about, .research, .team, .about-research, .articles-section, .contact-section {
        padding: 3rem 0;
    }
    
    .footer-section {
        min-width: 100%;
    }
    
    .articles-container {
        grid-template-columns: 1fr;
    }
}