/* CSS Variables for Theme Management */
:root {
  /* Light Theme Colors */
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a2e;
  --bg-accent: #16213e;
  --text-primary: #00ff41;
  --text-secondary: #ffffff;
  --text-accent: #ff6b35;
  --border-color: #00ff41;
  --shadow-color: rgba(0, 255, 65, 0.3);
  --gradient-primary: linear-gradient(135deg, #0f3460 0%, #16213e 50%, #1a1a2e 100%);
  --gradient-secondary: linear-gradient(45deg, #ff6b35, #f7931e);
  
  /* Arcade Colors */
  --neon-green: #00ff41;
  --neon-blue: #00d4ff;
  --neon-pink: #ff0080;
  --neon-yellow: #ffff00;
  --neon-orange: #ff6b35;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Typography */
  --font-primary: 'Orbitron', monospace;
  --font-secondary: 'Roboto', sans-serif;
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #f0f0f0;
  --bg-secondary: #ffffff;
  --bg-accent: #e8e8e8;
  --text-primary: #2d5016;
  --text-secondary: #333333;
  --text-accent: #d63384;
  --border-color: #2d5016;
  --shadow-color: rgba(45, 80, 22, 0.2);
  --gradient-primary: linear-gradient(135deg, #ffffff 0%, #f8f9fa 50%, #e9ecef 100%);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-secondary);
  background: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: all 0.3s ease;  
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-accent);
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-secondary);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--border-color);
  box-shadow: 0 2px 20px var(--shadow-color);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.logo {
  font-family: var(--font-primary);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-primary);
  text-shadow: 0 0 10px var(--text-primary);
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from { text-shadow: 0 0 10px var(--text-primary); }
  to { text-shadow: 0 0 20px var(--text-primary), 0 0 30px var(--text-primary); }
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  text-shadow: 0 0 10px var(--text-primary);
}

.nav-link:hover::before,
.nav-link.active::before {
  width: 100%;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: var(--spacing-xs);
  margin-left: var(--spacing-md);
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: all 0.3s ease;
  border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.language-toggle, .theme-toggle {
  display: flex;
  gap: var(--spacing-xs);
}

.lang-btn, .theme-btn {
  background: transparent;
  border: 2px solid var(--border-color);
  padding: var(--spacing-xs);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  color: var(--text-primary);
}

.lang-btn img {
  width: 24px;
  height: 18px;
  border-radius: 2px;
}

.lang-btn.active, .lang-btn:hover, .theme-btn:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
  box-shadow: 0 0 15px var(--shadow-color);
  transform: translateY(-2px);
}

.theme-btn i {
  font-size: 1.2rem;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Main Content */
.main-content {
  margin-top: 80px;
}

.section {
  padding: var(--spacing-xl) 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.section-title {
  font-family: var(--font-primary);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  text-shadow: 0 0 10px var(--text-primary);
}

/* Home Section */
.home-section {
  background: var(--gradient-primary);
  position: relative;
  overflow: hidden;
}

.home-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%2300ff41" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') repeat;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(10px, 10px); }
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-logo {
  max-width: 300px;
  height: auto;
  margin: 0 auto 2rem auto;
  display: block;
  filter: drop-shadow(0 0 20px var(--neon-green));
  transition: all 0.3s ease;
}

.hero-logo:hover {
  filter: drop-shadow(0 0 30px var(--neon-green)) brightness(1.1);
  transform: scale(1.05);
}

.hero-title {
  font-family: var(--font-primary);
  font-size: 3rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  text-shadow: 0 0 20px var(--text-primary);
  animation: typewriter 3s steps(30) 1s both;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-title-line1,
.hero-title-line2 {
  display: block;
  line-height: 1.1;
}

.hero-title-line1 {
  margin-bottom: 0.2rem;
}

.hero-title::after {
  content: "";
  display: block;
  width: 100%;
}

[data-lang="en"] .hero-title::before {
  content: "Welcome to";
  display: block;
}

[data-lang="en"] .hero-title {
  font-size: 0;
}

[data-lang="en"] .hero-title::after {
  content: "Useless Bytes Project";
  display: block;
  font-size: var(--font-size-xl);
}

[data-lang="pt"] .hero-title::before {
  content: "Bem-vindos ao";
  display: block;
}

[data-lang="pt"] .hero-title {
  font-size: 0;
}

[data-lang="pt"] .hero-title::after {
  content: "Useless Bytes Project";
  display: block;
  font-size: var(--font-size-xl);
}

@keyframes typewriter {
  from { width: 0; }
  to { width: 100%; }
}

.hero-description {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
  opacity: 0;
  animation: fadeInUp 1s ease 2s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cta-button {
  background: var(--gradient-secondary);
  border: none;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.1rem;
  font-weight: 600;
  color: white;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
  opacity: 0;
  animation: fadeInUp 1s ease 2.5s both;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(255, 107, 53, 0.5);
}

/* Pixel Art Animation */
.pixel-art-container {
  position: relative;
  width: 300px;
  height: 300px;
  margin: 0 auto;
}

.pixel-character {
  width: 80px;
  height: 80px;
  background: var(--text-primary);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 8px;
  box-shadow: 
    0 0 0 4px var(--bg-secondary),
    0 0 0 8px var(--text-primary),
    0 0 20px var(--text-primary);
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translate(-50%, -50%) translateY(0); }
  50% { transform: translate(-50%, -50%) translateY(-20px); }
}

.floating-pixels {
  position: absolute;
  width: 100%;
  height: 100%;
}

.floating-pixels::before,
.floating-pixels::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--neon-blue);
  border-radius: 2px;
  animation: float 3s ease-in-out infinite;
}

.floating-pixels::before {
  top: 20%;
  left: 20%;
  animation-delay: 0s;
}

.floating-pixels::after {
  top: 70%;
  right: 20%;
  background: var(--neon-pink);
  animation-delay: 1.5s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.7; }
  50% { transform: translateY(-30px) rotate(180deg); opacity: 1; }
}

/* Manifesto Section */
.manifesto-section {
  background: var(--bg-secondary);
  position: relative;
}

.manifesto-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.manifesto-text p {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  line-height: 1.8;
}

.manifesto-text p:first-child {
  font-size: 1.3rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* Projects Section */
.projects-section {
  background: var(--bg-accent);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.project-card {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: var(--spacing-lg);
  position: relative;
  transition: all 0.3s ease;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 65, 0.1), transparent);
  transition: left 0.5s ease;
}

.project-card:hover::before {
  left: 100%;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--shadow-color);
  border-color: var(--text-accent);
}

.project-status {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
}

.project-status.suggested {
  background: var(--neon-pink);
  color: var(--bg-primary);
}

.project-status.in-development {
  background: var(--neon-blue);
  color: var(--bg-primary);
}

.project-status.completed {
  background: var(--text-primary);
  color: var(--bg-primary);
}

.project-card h3 {
  font-family: var(--font-primary);
  font-size: 1.3rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.project-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Contact Section */
.contact-section {
  background: var(--gradient-primary);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.contact-item:hover {
  transform: translateX(10px);
  box-shadow: 0 5px 20px var(--shadow-color);
  border-color: var(--text-accent);
}

.contact-item i {
  font-size: 1.5rem;
  color: var(--text-primary);
  min-width: 30px;
}

.contact-item span {
  color: var(--text-secondary);
  font-weight: 500;
}

/* Footer */
.footer {
  background: var(--bg-primary);
  border-top: 2px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  text-align: center;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  * {
    box-sizing: border-box;
  }
  
  html, body {
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
  }
  
  .navbar {
    padding: var(--spacing-sm);
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
  }
  
  .logo {
    font-size: 1.2rem;
    flex: 1;
  }
  
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 999;
  }
  
  .mobile-menu-toggle {
    display: flex;
    order: 2;
  }
  
  .nav-controls {
    order: 3;
  }
  
  .nav-links {
    flex-direction: column;
    width: 100%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    opacity: 0;
  }
  
  .nav-links.active {
    max-height: 300px;
    opacity: 1;
  }
  
  .nav-link {
    text-align: center;
    padding: var(--spacing-sm);
    border-bottom: 1px solid rgba(0, 255, 65, 0.2);
  }
  
  .nav-link:last-child {
    border-bottom: none;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-md);
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0;
    margin: 0;
  }
  
  .hero-logo {
    max-width: 260px;
    width: 100%;
    margin: 0 auto 1rem auto;
    display: block;
  }

  .hero-title {
    font-size: 1.6rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
  }
  
  .hero-description {
    font-size: 0.9rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
  }
  
  .cta-button {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    max-width: 90%;
    margin: 0 auto;
    display: block;
    word-wrap: break-word;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .pixel-art-container {
    width: 150px;
    height: 150px;
    margin: 0 auto;
  }
  
  .hero-animation {
    width: 100%;
    max-width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .hero-text {
    width: 100%;
    max-width: 100%;
  }
  
  .projects-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .home-section {
    min-height: 100vh;
    padding: calc(60px + var(--spacing-sm)) 0 var(--spacing-md) 0;
    margin: 0;
    overflow-x: hidden;
  }
  
  .home-section .container {
    padding: 0;
    margin: 0;
    max-width: 100%;
    width: 100%;
  }
  
  .hero-content {
    gap: var(--spacing-sm);
    padding: 0;
    margin: 0;
    width: 100%;
    max-width: 100%;
  }
  
  .hero-text {
    padding: 0;
    margin: 0;
    width: 100%;
    text-align: center;
  }
  
  .hero-animation {
    padding: 0;
    margin: 0;
    width: 100%;
  }
  
  .hero-title {
    font-size: 1.3rem;
    line-height: 1.1;
    margin: 0 0 0.5rem 0;
    padding: 0;
  }
  
  .hero-description {
    font-size: 0.75rem;
    line-height: 1.3;
    margin: 0 0 1rem 0;
    padding: 0;
  }
  
  .cta-button {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    max-width: 75%;
    margin: 0 auto;
    display: block;
    width: auto;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .container {
    padding: 0 var(--spacing-xs);
  }
  
  .contact-section {
    padding: 2rem 0;
  }
  
  .contact-item {
    min-width: 250px;
    padding: 1rem;
  }
  
  .contact-grid {
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .home-section {
    padding: calc(60px + var(--spacing-sm)) 0 var(--spacing-md) 0;
    margin: 0;
    overflow-x: hidden;
  }
  
  .home-section .container {
    padding: 0;
    margin: 0;
    max-width: 100%;
    width: 100%;
  }
  
  .hero-content {
    gap: var(--spacing-sm);
    padding: 0;
    margin: 0;
    width: 100%;
    max-width: 100%;
  }
  
  
  .hero-text {
    padding: 0;
    margin: 0;
    width: 100%;
    text-align: center;
  }
  
  .hero-animation {
    padding: 0;
    margin: 0;
    width: 100%;
  }
  
  .hero-title {
    font-size: 1.3rem;
    line-height: 1.1;
    margin: 0 0 0.5rem 0;
    padding: 0;
  }
  
  .hero-description {
    font-size: 0.75rem;
    line-height: 1.3;
    margin: 0 0 1rem 0;
    padding: 0;
  }
  
  .cta-button {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    max-width: 75%;
    margin: 0 auto;
    display: block;
    width: auto;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .container {
    padding: 0 var(--spacing-xs);
  }
  
  .contact-section {
    padding: 2rem 0;
  }
  
  .contact-item {
    min-width: 250px;
    padding: 1rem;
  }
  
  .contact-grid {
    gap: 1rem;
  }
}
  
  .cta-button {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
  }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3.5rem;
    height: 3.5rem;
    background: var(--accent-color);
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    color: var(--bg-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    z-index: 1000;
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    box-shadow: 0 4px 20px rgba(0, 255, 127, 0.3);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: transparent;
    color: var(--accent-color);
    box-shadow: 0 6px 30px rgba(0, 255, 127, 0.5);
    transform: translateY(-2px);
}

.back-to-top:active {
    transform: translateY(0) scale(0.95);
}

.back-to-top svg {
    transition: transform 0.3s ease;
}

.back-to-top:hover svg {
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 3rem;
        height: 3rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .back-to-top {
        transition: none;
    }
}

/* Focus styles for accessibility */
.lang-btn:focus,
.theme-btn:focus,
.cta-button:focus {
  outline: 2px solid var(--text-accent);
  outline-offset: 2px;
}

/* Toast Notification Styles */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: 8px;
  border: 2px solid var(--border-color);
  box-shadow: 0 4px 12px var(--shadow-color);
  font-family: var(--font-primary);
  font-size: 14px;
  font-weight: 600;
  z-index: 9999;
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.success {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-accent));
  border-color: var(--neon-green);
  box-shadow: 0 4px 12px rgba(0, 255, 65, 0.4);
}

.toast::before {
  content: '✓';
  margin-right: 8px;
  color: var(--neon-green);
  font-weight: bold;
}

@media (max-width: 480px) {
  .toast {
    top: 10px;
    right: 10px;
    left: 10px;
    transform: translateY(-100%);
    font-size: 13px;
    padding: 10px 16px;
  }
  
  .toast.show {
    transform: translateY(0);
  }
}

/* Print styles */
@media print {
  .header,
  .nav-controls,
  .hero-animation {
    display: none;
  }
  
  .main-content {
    margin-top: 0;
  }
  
  .section {
    min-height: auto;
    page-break-inside: avoid;
  }
}