Formulário de login futurista

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Futuristic Login Portal</title>
  <link rel="stylesheet" href="styles.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
</head>
<body>
  <div class="container">
    <div class="login-card">
      <div class="glowing-border"></div>
      <div class="scanner-line"></div>
      
      <div class="header">
        <div class="logo">
          <div class="circle"></div>
          <div class="hexagon"></div>
        </div>
        <h1>NEXUS <span>PORTAL</span></h1>
        <p class="subtitle">Secure Authentication System</p>
      </div>
      
      <form id="login-form">
        <div class="input-group">
          <div class="input-icon">
            <i class="fas fa-user"></i>
          </div>
          <input type="text" id="username" placeholder="USERNAME" required autocomplete="off">
          <div class="input-line"></div>
        </div>
        
        <div class="input-group">
          <div class="input-icon">
            <i class="fas fa-lock"></i>
          </div>
          <input type="password" id="password" placeholder="PASSWORD" required>
          <div class="input-line"></div>
        </div>
        
        <div class="options">
          <label class="remember-me">
            <input type="checkbox" id="remember">
            <span class="checkmark"></span>
            Remember Me
          </label>
          <a href="#" class="forgot-password">Forgot Password?</a>
        </div>
        
        <button type="submit" class="login-btn">
          <span class="btn-text">ACCESS</span>
          <span class="btn-icon"><i class="fas fa-arrow-right"></i></span>
        </button>
      </form>
      
      <div class="footer">
        <p>Not registered? <a href="#">Create Account</a></p>
        <div class="security-badge">
          <i class="fas fa-shield-alt"></i>
          <span>Secured by Quantum Encryption</span>
        </div>
      </div>
    </div>
  </div>
  
  <div class="particles-container"></div>
  
  <script src="script.js"></script>
</body>
</html>

CSS

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700&family=Roboto:wght@300;400&display=swap');

:root {
  --primary-color: #00f0ff;
  --secondary-color: #0072ff;
  --accent-color: #ff00e6;
  --dark-color: #0a0e17;
  --darker-color: #060a14;
  --text-color: #e0e0e0;
  --shadow-color: rgba(0, 240, 255, 0.2);
}

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

body {
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, var(--darker-color), var(--dark-color));
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  position: relative;
}

.particles-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.container {
  width: 100%;
  max-width: 450px;
  padding: 20px;
  z-index: 1;
  perspective: 1000px;
}

.login-card {
  background: rgba(14, 20, 33, 0.8);
  backdrop-filter: blur(8px);
  border-radius: 12px;
  overflow: hidden;
  padding: 40px 30px;
  position: relative;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5),
              0 0 20px var(--shadow-color);
  transform-style: preserve-3d;
  animation: cardAppear 0.8s ease-out forwards;
}

@keyframes cardAppear {
  0% {
    opacity: 0;
    transform: translateY(30px) rotateX(10deg);
  }
  100% {
    opacity: 1;
    transform: translateY(0) rotateX(0);
  }
}

.glowing-border {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 2px solid transparent;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--accent-color)) border-box;
  -webkit-mask: 
    linear-gradient(#fff 0 0) padding-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  animation: borderPulse 4s infinite;
}

@keyframes borderPulse {
  0%, 100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

.scanner-line {
  position: absolute;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(0, 240, 255, 0), 
    var(--primary-color),
    rgba(0, 240, 255, 0), 
    transparent);
  top: 0;
  left: 0;
  animation: scan 3s cubic-bezier(0.42, 0, 0.58, 1) infinite;
  z-index: 2;
}

@keyframes scan {
  0% {
    top: 0;
    opacity: 0;
  }
  5% {
    opacity: 1;
  }
  95% {
    opacity: 1;
  }
  100% {
    top: 100%;
    opacity: 0;
  }
}

.header {
  text-align: center;
  margin-bottom: 40px;
}

.logo {
  position: relative;
  width: 70px;
  height: 70px;
  margin: 0 auto 15px;
}

.circle {
  position: absolute;
  width: 50px;
  height: 50px;
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  top: 10px;
  left: 10px;
  animation: rotateLogo 8s linear infinite;
}

.hexagon {
  position: absolute;
  width: 40px;
  height: 23px;
  background: transparent;
  border-left: 2px solid var(--accent-color);
  border-right: 2px solid var(--accent-color);
  top: 23px;
  left: 15px;
  animation: pulseLogo 2s infinite;
}

.hexagon:before,
.hexagon:after {
  content: "";
  position: absolute;
  width: 0;
  height: 0;
  left: -2px;
  border-left: 22px solid transparent;
  border-right: 22px solid transparent;
}

.hexagon:before {
  top: -12px;
  border-bottom: 12px solid var(--accent-color);
}

.hexagon:after {
  bottom: -12px;
  border-top: 12px solid var(--accent-color);
}

@keyframes rotateLogo {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes pulseLogo {
  0%, 100% {
    opacity: 0.6;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.1);
  }
}

h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: 28px;
  letter-spacing: 3px;
  margin-bottom: 5px;
  color: white;
  text-shadow: 0 0 10px var(--primary-color);
  animation: textGlow 2s infinite alternate;
}

h1 span {
  color: var(--primary-color);
}

@keyframes textGlow {
  0% {
    text-shadow: 0 0 5px var(--primary-color);
  }
  100% {
    text-shadow: 0 0 15px var(--primary-color);
  }
}

.subtitle {
  font-size: 14px;
  color: #a0a0a0;
  letter-spacing: 1px;
}

.input-group {
  position: relative;
  margin-bottom: 30px;
}

.input-icon {
  position: absolute;
  left: 0;
  top: 12px;
  color: var(--primary-color);
  font-size: 16px;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  background: transparent;
  border: none;
  padding: 12px 0 12px 30px;
  font-size: 16px;
  color: var(--text-color);
  font-family: 'Orbitron', sans-serif;
  letter-spacing: 1px;
  outline: none;
}

input::placeholder {
  color: rgba(224, 224, 224, 0.5);
}

.input-line {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform-origin: left;
  transform: scaleX(0.3);
  transition: transform 0.3s ease;
}

.input-group:focus-within .input-line {
  transform: scaleX(1);
}

.options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  font-size: 14px;
}

.remember-me {
  display: flex;
  align-items: center;
  position: relative;
  cursor: pointer;
  padding-left: 25px;
}

.remember-me input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 18px;
  width: 18px;
  background-color: transparent;
  border: 1px solid var(--primary-color);
  border-radius: 3px;
}

.remember-me:hover .checkmark {
  background-color: rgba(0, 240, 255, 0.1);
}

.remember-me input:checked ~ .checkmark {
  background-color: var(--primary-color);
}

.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

.remember-me input:checked ~ .checkmark:after {
  display: block;
}

.remember-me .checkmark:after {
  left: 6px;
  top: 2px;
  width: 4px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.forgot-password {
  color: var(--primary-color);
  text-decoration: none;
  transition: all 0.3s;
}

.forgot-password:hover {
  text-shadow: 0 0 8px var(--primary-color);
}

.login-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(45deg, var(--secondary-color), var(--primary-color));
  border: none;
  border-radius: 30px;
  color: white;
  font-family: 'Orbitron', sans-serif;
  font-size: 16px;
  letter-spacing: 2px;
  cursor: pointer;
  box-shadow: 0 5px 15px rgba(0, 114, 255, 0.3);
  position: relative;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all 0.3s ease;
}

.login-btn:hover {
  box-shadow: 0 8px 20px rgba(0, 114, 255, 0.5);
  transform: translateY(-2px);
}

.login-btn:active {
  transform: translateY(0);
  box-shadow: 0 3px 10px rgba(0, 114, 255, 0.3);
}

.btn-text {
  margin-right: 10px;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translateX(0);
  transition: transform 0.3s ease;
}

.login-btn:hover .btn-icon {
  transform: translateX(5px);
}

.footer {
  margin-top: 40px;
  text-align: center;
  font-size: 14px;
}

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

.footer a:hover {
  text-shadow: 0 0 8px var(--primary-color);
}

.security-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 15px;
  font-size: 12px;
  color: #a0a0a0;
}

.security-badge i {
  color: var(--accent-color);
  margin-right: 6px;
}

/* Responsive styles */
@media (max-width: 480px) {
  .login-card {
    padding: 30px 20px;
  }
  
  h1 {
    font-size: 24px;
  }
  
  .options {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .forgot-password {
    margin-top: 10px;
  }
}

JS

document.addEventListener('DOMContentLoaded', () => {
  // Create floating particles
  createParticles();
  
  // Form handling
  setupFormInteractions();
  
  // Add typewriter effect to the subtitle
  typewriterEffect();
});

// Create floating particles in the background
function createParticles() {
  const container = document.querySelector('.particles-container');
  const particleCount = 50;
  
  for (let i = 0; i < particleCount; i++) {
    const particle = document.createElement('div');
    
    // Randomize particle properties
    const size = Math.random() * 3 + 1;
    const posX = Math.random() * 100;
    const posY = Math.random() * 100;
    const opacity = Math.random() * 0.5 + 0.2;
    const duration = Math.random() * 20 + 10;
    const delay = Math.random() * 5;
    
    // Apply styles
    particle.style.cssText = `
      position: absolute;
      width: ${size}px;
      height: ${size}px;
      background: ${Math.random() > 0.5 ? '#00f0ff' : '#ff00e6'};
      border-radius: 50%;
      top: ${posY}%;
      left: ${posX}%;
      opacity: ${opacity};
      box-shadow: 0 0 ${size * 2}px ${Math.random() > 0.5 ? '#00f0ff' : '#ff00e6'};
      animation: float ${duration}s ease-in-out ${delay}s infinite;
      pointer-events: none;
    `;
    
    container.appendChild(particle);
  }
  
  // Add the float animation
  const style = document.createElement('style');
  style.textContent = `
    @keyframes float {
      0%, 100% {
        transform: translateY(0) translateX(0);
      }
      25% {
        transform: translateY(-20px) translateX(10px);
      }
      50% {
        transform: translateY(-10px) translateX(-15px);
      }
      75% {
        transform: translateY(-25px) translateX(15px);
      }
    }
  `;
  document.head.appendChild(style);
}

// Handle form interactions
function setupFormInteractions() {
  const form = document.getElementById('login-form');
  const inputs = form.querySelectorAll('input');
  
  // Add focus effects to inputs
  inputs.forEach(input => {
    input.addEventListener('focus', () => {
      input.parentElement.classList.add('focused');
      playTechSound('focus');
    });
    
    input.addEventListener('blur', () => {
      input.parentElement.classList.remove('focused');
    });
  });
  
  // Handle form submission
  form.addEventListener('submit', (e) => {
    e.preventDefault();
    
    const username = document.getElementById('username').value;
    const password = document.getElementById('password').value;
    
    if (username && password) {
      simulateLogin();
    } else {
      showError('Please fill in all fields');
    }
  });
}

// Simulate login process with animations
function simulateLogin() {
  const loginBtn = document.querySelector('.login-btn');
  const loginCard = document.querySelector('.login-card');
  
  // Change button text and add loading effect
  loginBtn.innerHTML = '<span class="loading"></span> AUTHENTICATING';
  loginBtn.disabled = true;
  loginBtn.style.cursor = 'wait';
  playTechSound('authenticate');
  
  // Add loading style
  const style = document.createElement('style');
  style.textContent = `
    .loading {
      display: inline-block;
      width: 20px;
      height: 20px;
      border: 2px solid rgba(255,255,255,0.3);
      border-radius: 50%;
      border-top-color: white;
      animation: spin 1s linear infinite;
      margin-right: 10px;
    }
    
    @keyframes spin {
      to { transform: rotate(360deg); }
    }
    
    @keyframes success {
      0% { box-shadow: 0 0 0 0px rgba(0, 255, 0, 0.4); }
      100% { box-shadow: 0 0 0 20px rgba(0, 255, 0, 0); }
    }
    
    @keyframes accessGranted {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(0); opacity: 0; }
    }
  `;
  document.head.appendChild(style);
  
  // Simulate authentication process
  setTimeout(() => {
    // Simulate success
    loginBtn.innerHTML = '<i class="fas fa-check"></i> ACCESS GRANTED';
    loginBtn.style.background = 'linear-gradient(45deg, #00b300, #00ff00)';
    loginBtn.style.animation = 'success 1s ease forwards';
    playTechSound('success');
    
    // Fade out the login card
    setTimeout(() => {
      loginCard.style.animation = 'accessGranted 1s ease forwards';
      
      // Redirect or show dashboard (simulated)
      setTimeout(() => {
        alert('Login successful! This is a demo, so no actual authentication is performed.');
        location.reload();
      }, 1000);
    }, 1500);
  }, 2500);
}

// Show error message
function showError(message) {
  // Create error element if it doesn't exist
  let errorElement = document.querySelector('.error-message');
  
  if (!errorElement) {
    errorElement = document.createElement('div');
    errorElement.className = 'error-message';
    errorElement.style.cssText = `
      color: #ff3366;
      text-align: center;
      margin-bottom: 20px;
      font-size: 14px;
      letter-spacing: 0.5px;
      animation: errorFadeIn 0.3s ease forwards;
      opacity: 0;
    `;
    
    const loginBtn = document.querySelector('.login-btn');
    loginBtn.parentNode.insertBefore(errorElement, loginBtn);
    
    // Add error animation
    const style = document.createElement('style');
    style.textContent = `
      @keyframes errorFadeIn {
        from { opacity: 0; transform: translateY(-10px); }
        to { opacity: 1; transform: translateY(0); }
      }
    `;
    document.head.appendChild(style);
  }
  
  // Set message and play error sound
  errorElement.textContent = message;
  playTechSound('error');
  
  // Remove error after 3 seconds
  setTimeout(() => {
    errorElement.style.opacity = '0';
    errorElement.style.transform = 'translateY(-10px)';
    setTimeout(() => {
      errorElement.remove();
    }, 300);
  }, 3000);
}

// Typewriter effect for subtitle
function typewriterEffect() {
  const subtitle = document.querySelector('.subtitle');
  const text = subtitle.textContent;
  subtitle.textContent = '';
  
  let i = 0;
  const interval = setInterval(() => {
    if (i < text.length) {
      subtitle.textContent += text.charAt(i);
      i++;
    } else {
      clearInterval(interval);
    }
  }, 100);
}

// Play tech sounds for interactions
function playTechSound(type) {
  // In a real application, you could create and play actual sound effects
  // This is a placeholder for demonstration purposes
  
  // Console log for demonstration
  console.log(`Playing ${type} sound effect`);
  
  // In a real implementation, you would create AudioContext and play sounds:
  /*
  const audioContext = new (window.AudioContext || window.webkitAudioContext)();
  
  // Different sound types
  if (type === 'focus') {
    const oscillator = audioContext.createOscillator();
    oscillator.type = 'sine';
    oscillator.frequency.setValueAtTime(600, audioContext.currentTime);
    oscillator.connect(audioContext.destination);
    oscillator.start();
    oscillator.stop(audioContext.currentTime + 0.1);
  } else if (type === 'error') {
    // Error sound
  } else if (type === 'success') {
    // Success sound
  }
  */
}

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