/* ===================================
   Renan Macêdo - Portfolio Styles
   Dark Theme
   =================================== */

/* --- CSS Variables --- */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a24;
  --bg-card: #16161f;
  
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6a6a7a;
  
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
  
  --border-color: #2a2a3a;
  --shadow-color: rgba(0, 0, 0, 0.5);
  
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  --container-max: 1200px;
  --section-padding: 100px 0;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

ul {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent-gradient);
  margin: 1rem auto 0;
  border-radius: 2px;
}

/* --- Container & Layout --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: var(--section-padding);
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  border-bottom-color: var(--border-color);
  padding: 0.75rem 0;
}

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

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width var(--transition-normal);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
    /* Make gradient stronger to ensure text readability over images */
    background:
      linear-gradient(to right, var(--bg-primary) 0%, rgba(10, 10, 15, 0.85) 50%, rgba(10, 10, 15, 0.7) 100%),
      radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.2) 0%, transparent 50%);
    z-index: 1;
    pointer-events: none;
  }

  .hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
  }

  .hero-bg-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
  }

  .hero-bg-slide.active {
    opacity: 0.4; /* Low opacity so it fades into the dark background */
  }

  .hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
  color: var(--accent-primary);
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-subtitle::before {
  content: '';
  width: 30px;
  height: 2px;
  background: var(--accent-primary);
}

.hero-title {
  margin-bottom: 1.5rem;
}

.hero-title .highlight {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 500px;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

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

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.hero-image-wrapper::before {
  content: '';
  position: absolute;
  inset: -20px;
  background: var(--accent-gradient);
  border-radius: 50%;
  opacity: 0.2;
  filter: blur(40px);
  animation: pulse 4s ease-in-out infinite;
}

.hero-image-placeholder {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 4px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
  color: var(--text-muted);
  position: relative;
  overflow: hidden;
}

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

@keyframes pulse {
  0%, 100% { opacity: 0.2; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(1.05); }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* --- About Section --- */
.about {
  background: var(--bg-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: start;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.stat-card {
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: all var(--transition-normal);
}

.stat-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-5px);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

.about-text h3 {
  margin-bottom: 1.5rem;
}

.about-text p {
  font-size: 1.05rem;
}

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

.skill-category {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.skill-category:hover {
  border-color: var(--accent-primary);
  transform: translateY(-5px);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.skill-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-tag {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

/* --- Experience Section --- */
.experience {
  background: var(--bg-secondary);
}

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-left: 40px;
  padding-bottom: 3rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -7px;
  top: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-gradient);
  border: 3px solid var(--bg-secondary);
}

.timeline-date {
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.timeline-content {
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.timeline-content h3 {
  margin-bottom: 0.25rem;
}

.timeline-content h4 {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.timeline-content ul {
  list-style: disc;
  padding-left: 1.25rem;
}

.timeline-content li {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

/* --- Projects Section --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  justify-content: center; /* Center items horizontally */
}

.project-card {
  background: var(--bg-card);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.project-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-image {
  aspect-ratio: 16/9;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--text-muted);
  overflow: hidden;
  position: relative;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-content {
  padding: 1.5rem;
}

.project-content h3 {
  margin-bottom: 0.5rem;
}

.project-content p {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.project-tech span {
  background: var(--bg-tertiary);
  color: var(--accent-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-links a {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

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

/* --- Project Carousel --- */
.project-carousel {
  aspect-ratio: 16/9;
  background: var(--bg-tertiary);
  position: relative;
  overflow: hidden;
}

.carousel-slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
  z-index: 1;
}

.carousel-slide.active {
  opacity: 1;
  z-index: 2;
}

.carousel-video {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
}

.carousel-video iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.carousel-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  padding: 0;
}

.carousel-dot:hover {
  background: rgba(255, 255, 255, 0.7);
}

.carousel-dot.active {
  background: var(--accent-primary);
  transform: scale(1.2);
}

/* Featured project card (larger) */
.project-card-featured {
  grid-column: 1 / -1; /* Span full width */
  max-width: 900px; /* Limit width */
  margin: 0 auto; /* Center horizontally */
  width: 100%;
}

@media (min-width: 768px) {
  .project-card-featured .project-carousel {
    aspect-ratio: 21/9;
  }
}

.project-card:hover .carousel-slide.active {
  transform: scale(1.02);
}

/* Pause carousel on hover */
.project-carousel:hover .carousel-slide {
  animation-play-state: paused;
}

/* --- Education Section --- */
.education {
  background: var(--bg-secondary);
}

.education-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  max-width: 700px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: center;
}

.education-icon {
  width: 80px;
  height: 80px;
  border-radius: 16px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.education-info h3 {
  margin-bottom: 0.25rem;
}

.education-info h4 {
  color: var(--accent-primary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.education-info p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* --- Articles Section --- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.article-card {
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.article-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-5px);
}

.article-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.article-card p {
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.article-card a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.article-image {
  margin: -1.5rem -1.5rem 1.5rem -1.5rem;
  border-radius: 12px 12px 0 0;
  overflow: hidden;
  height: 200px;
}

.article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.article-card:hover .article-image img {
  transform: scale(1.05);
}

/* --- Contact Section --- */
.contact {
  background: var(--bg-secondary);
}

.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-content p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all var(--transition-normal);
}

.contact-link:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
  transform: translateY(-3px);
}

.contact-link svg {
  width: 24px;
  height: 24px;
}

/* --- Footer --- */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive Design --- */
@media (max-width: 992px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-content {
    order: 2;
  }
  
  .hero-image {
    order: 1;
  }
  
  .hero-subtitle {
    justify-content: center;
  }
  
  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  .hero-image-wrapper {
    max-width: 300px;
  }
  
  .about-content {
    grid-template-columns: 1fr;
  }
  
  .about-stats {
    max-width: 400px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    height: 100vh;
    width: 70%;
    max-width: 300px;
    background: var(--bg-secondary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transition: right var(--transition-normal);
    border-left: 1px solid var(--border-color);
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-toggle {
    display: flex;
    z-index: 1001;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .education-card {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .education-icon {
    margin: 0 auto;
  }
  
  .timeline::before {
    left: 7px;
  }
  
  .timeline-dot {
    left: 0;
  }
  
  .timeline-item {
    padding-left: 35px;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .contact-links {
    flex-direction: column;
    align-items: center;
  }
  
  .contact-link {
    width: 100%;
    justify-content: center;
  }
}