:root {
  --bg-color: #0b1120;
  --card-bg: #131c31;
  --card-hover: #19243f;
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: #1e293b;
  --border-accent: #334155;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.7;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 2.5rem;
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.logo {
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--accent);
  letter-spacing: 0.5px;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
}

.navbar nav {
  display: flex;
}

.navbar nav a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 2rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.navbar nav a:hover,
.navbar nav a.active {
  color: var(--accent);
}

.container {
  max-width: 960px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
}

.page-section {
  display: none;
}

.page-section.active {
  display: block;
}

/* Headings */
h1 {
  font-size: 2rem;
  color: var(--text-main);
  font-weight: 800;
  letter-spacing: -0.5px;
}

.section-header {
  margin-bottom: 2rem;
}

.bio-lead {
  font-size: 1.15rem;
  color: var(--accent);
  margin-top: 0.3rem;
  font-weight: 500;
}

h3 {
  color: var(--text-main);
  font-size: 1.2rem;
  font-weight: 700;
}

.section-subtitle {
  margin-top: 1.2rem;
  margin-bottom: 0.5rem;
}

.card-title-icon {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
  font-size: 1.3rem;
  color: var(--accent);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.8rem;
}

.card-title-icon svg {
  width: 22px;
  height: 22px;
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  transition: border-color 0.3s ease;
}

.card:hover {
  border-color: var(--border-accent);
}

.intro-card {
  border-left: 4px solid var(--accent);
  background: linear-gradient(135deg, var(--card-bg) 0%, rgba(56, 189, 248, 0.03) 100%);
}

.welcome-box h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.welcome-box h3 svg {
  width: 18px;
  height: 18px;
}

.divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 1.5rem 0;
}

.text-justify {
  text-align: justify;
  color: var(--text-muted);
  font-size: 0.98rem;
}

/* Skills Badges */
.skills-badges {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.skills-badges span {
  background: rgba(56, 189, 248, 0.08);
  color: var(--accent);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 0.4rem 0.9rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.2s;
}

.skills-badges span:hover {
  background: rgba(56, 189, 248, 0.15);
}

/* Experiências com Linhas Divisórias */
.experience-item {
  margin-bottom: 1.8rem;
  padding-bottom: 1.8rem;
  border-bottom: 1px solid var(--border-color);
}

.experience-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.experience-item h4 {
  color: var(--text-main);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.post-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.8rem;
}

.experience-list {
  list-style-type: disc;
  padding-left: 1.2rem;
}

.experience-list li {
  margin-bottom: 0.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Formação Acadêmica Grid */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem;
  margin-top: 1rem;
}

.education-item {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 1.2rem;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.education-item:hover {
  transform: translateY(-2px);
  border-color: var(--border-accent);
}

.edu-degree {
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.98rem;
}

.edu-school {
  color: var(--accent);
  font-size: 0.9rem;
}

.edu-year {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: auto;
}

/* Tabs */
.tab-buttons {
  display: flex;
  gap: 0.6rem;
  margin: 1.5rem 0;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.8rem;
}

.tab-btn {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  font-size: 0.95rem;
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  border-color: var(--border-accent);
  color: var(--text-main);
}

.tab-btn.active {
  background: var(--accent);
  color: #0b1120;
  border-color: var(--accent);
  font-weight: 700;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

pre {
  background: #070a13;
  padding: 1.2rem;
  border-radius: 8px;
  overflow-x: auto;
  margin-top: 1rem;
  color: #e2e8f0;
  border: 1px solid var(--border-color);
  font-family: monospace;
}

/* Blog */
.blog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.views-counter {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--card-bg);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.views-counter strong {
  color: var(--accent);
}

/* Contato */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.contact-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 10px;
  text-decoration: none;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 1rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.contact-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  background-color: var(--card-hover);
  color: var(--accent);
}

/* Responsividade Mobile */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .navbar {
    padding: 1rem 1.5rem;
  }

  .navbar nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--card-bg);
    flex-direction: column;
    border-bottom: 1px solid var(--border-color);
    padding: 1.2rem 0;
    box-shadow: 0 10px 20px rgba(0,0,0,0.4);
  }

  .navbar nav.active {
    display: flex;
  }

  .navbar nav a {
    margin: 0.8rem 2rem;
    font-size: 1.05rem;
  }

  .blog-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .card {
    padding: 1.2rem;
  }
}