/* Main CSS for Prof. Paulo Rettore Website */

:root {
  --primary-bg: #1a1a1a;
  --secondary-bg: #222222;
  --text-color: #ffffff;
  --accent-color-1: #0d6efd; /* Blue for Início */
  --accent-color-2: #ffc107; /* Yellow for About Me */
  --accent-color-3: #dc3545; /* Red for Research */
  --accent-color-4: #17a2b8; /* Teal for Lectures */
  --accent-color-5: #e83e8c; /* Pink for Students */
  --accent-color-6: #6f42c1; /* Purple for Publications */
  --link-hover: #cccccc;
  --section-padding: 2rem 0;
  --card-bg: #2a2a2a;
}

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

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

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Header Styles */
header {
  background-color: var(--primary-bg);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

.logo a {
  color: var(--text-color);
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
}

.nav-menu {
  display: flex;
  list-style: none;
}

.nav-menu li {
  margin-left: 1.5rem;
}

.nav-menu a {
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.3s ease;
  padding: 0.5rem;
}

.nav-menu a:hover {
  color: var(--link-hover);
}

.nav-menu a.active {
  border-bottom: 2px solid;
}

.home a.active {
  border-color: var(--accent-color-1);
}

.about a.active {
  border-color: var(--accent-color-2);
}

.research a.active {
  border-color: var(--accent-color-3);
}

.lectures a.active {
  border-color: var(--accent-color-4);
}

.students a.active {
  border-color: var(--accent-color-5);
}

.publications a.active {
  border-color: var(--accent-color-6);
}

/* Hero Section */
.hero {
  background-image: url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto;
}

/* Section Styles */
section {
  padding: var(--section-padding);
}

.section-title {
  text-align: center;
  margin-bottom: 2rem;
}

.section-title h2 {
  font-size: 2.5rem;
  position: relative;
  display: inline-block;
  padding-bottom: 0.5rem;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 3px;
  background-color: var(--accent-color-1);
}

/* About Section */
.about-section .section-title h2::after {
  background-color: var(--accent-color-2);
}

.about-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.wordcloud-section {
    margin-top: 40px;
    text-align: center;
}

#wordCloud {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.bio, .expertise, .interests {
  background-color: var(--card-bg);
  padding: 1.5rem;
  border-radius: 5px;
}

/* Research Section */
.research-section .section-title h2::after {
  background-color: var(--accent-color-3);
}

.research-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.research-card {
  background-color: var(--card-bg);
  padding: 1.5rem;
  border-radius: 5px;
  transition: transform 0.3s ease;
}

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

.research-card h3 {
  margin-bottom: 1rem;
}

.research-card .date {
  color: #aaa;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.research-card .read-more {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent-color-3);
  text-decoration: none;
}

/* Lectures Section */
.lectures-section .section-title h2::after {
  background-color: var(--accent-color-4);
}

.lectures-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.lecture-card {
  background-color: var(--card-bg);
  padding: 1.5rem;
  border-radius: 5px;
  transition: transform 0.3s ease;
}

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

.lecture-card h3 {
  margin-bottom: 1rem;
}


/* Students Section */
.students-section .section-title h2::after {
  background-color: var(--accent-color-5);
}

.students-categories h3 {
  margin: 2rem 0 1rem;
  border-bottom: 1px solid #444;
  padding-bottom: 0.5rem;
}

.student-card {
  background-color: var(--card-bg);
  padding: 1.5rem;
  border-radius: 5px;
  margin-bottom: 1.5rem;
}

.student-card h4 {
  margin-bottom: 0.5rem;
}

.student-card p {
  margin-bottom: 0.5rem;
}

.student-card a {
  color: var(--accent-color-5);
  text-decoration: none;
}

/* Publications Section */
.publications-section .section-title h2::after {
  background-color: var(--accent-color-6);
}

.publication-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.publication-link {
  background-color: var(--card-bg);
  padding: 0.8rem 1.5rem;
  border-radius: 5px;
  text-decoration: none;
  color: var(--text-color);
  transition: background-color 0.3s ease;
}

.publication-link:hover {
  background-color: #3a3a3a;
}

.publication-categories h3 {
  margin: 2rem 0 1rem;
  border-bottom: 1px solid #444;
  padding-bottom: 0.5rem;
}

.publication-item {
  background-color: var(--card-bg);
  padding: 1.5rem;
  border-radius: 5px;
  margin-bottom: 1.5rem;
}

.publication-item h4 {
  margin-bottom: 0.5rem;
}

.publication-item p {
  margin-bottom: 0.5rem;
}

.publication-item a {
  display: inline-block;
  margin-top: 0.5rem;
  color: var(--accent-color-6);
  text-decoration: none;
}

/* Footer */
footer {
  background-color: var(--secondary-bg);
  padding: 2rem 0;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer-nav {
  display: flex;
  list-style: none;
  margin-bottom: 1rem;
}

.footer-nav li {
  margin: 0 1rem;
}

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

.footer-nav a:hover {
  color: var(--link-hover);
}

.contact-info {
  margin-bottom: 1rem;
}

.contact-info a {
  color: var(--text-color);
  text-decoration: none;
}

.copyright {
  font-size: 0.9rem;
  color: #aaa;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
  }
  
  .logo {
    margin-bottom: 1rem;
  }
  
  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .nav-menu li {
    margin: 0.5rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero {
    height: 50vh;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .section-title h2 {
    font-size: 1.8rem;
  }
}