HTML / Markup Public

Modern Animated Login Form

An animated login form with email and password fields, glowing Sign In button, and smooth hover effects.

HTML / Markup

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>Animated Login Form</title>
  <style>
    @import url('https://fonts.googleapis.com/css2?family=Roboto&display=swap');
    *, *::before, *::after {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: 'Roboto', sans-serif;
      height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      background: linear-gradient(135deg, #667eea, #764ba2);
      color: #eee;
    }
    .login-container {
      background: #1e1e2f;
      padding: 40px 50px;
      border-radius: 12px;
      box-shadow: 0 0 15px rgba(118, 75, 162, 0.7);
      width: 320px;
      display: flex;
      flex-direction: column;
      gap: 30px;
      position: relative;
    }
    .login-container h2 {
      text-align: center;
      margin-bottom: 10px;
      font-weight: 700;
      letter-spacing: 2px;
      color: #ddd;
    }
    .input-group {
      width: 100%;
    }
    .input-group input {
      width: 100%;
      padding: 14px 18px;
      border-radius: 8px;
      border: 2px solid #444;
      background: #2a2a3d;
      color: #eee;
      font-size: 16px;
      outline-offset: 2px;
      outline-color: transparent;
      transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease, outline-color 0.3s ease;
    }
    .input-group input::placeholder {
      color: #bbb;
    }
    .input-group input:focus {
      border-color: #a77eea;
      box-shadow: 0 0 8px #a77eea;
      background: #3b3b5c;
      outline-color: #a77eea;
    }
    .sign-in-btn {
      padding: 16px 0;
      border: none;
      border-radius: 10px;
      background: linear-gradient(270deg, #764ba2, #667eea, #764ba2);
      background-size: 600% 600%;
      color: #fff;
      font-weight: 700;
      font-size: 18px;
      cursor: pointer;
      box-shadow: 0 0 20px #764ba2;
      transition: box-shadow 0.3s ease, background-size 0.3s ease;
      user-select: none;
      animation: glowing 15s linear infinite;
    }
    .sign-in-btn:hover,
    .sign-in-btn:focus {
      box-shadow: 0 0 30px 4px #a77eea;
      animation-play-state: paused;
      background-size: 100% 100%;
      outline: none;
    }
    @keyframes glowing {
      0% {
        background-position: 0% 50%;
      }
      50% {
        background-position: 100% 50%;
      }
      100% {
        background-position: 0% 50%;
      }
    }
    .error-message {
      color: #ff6b6b;
      font-size: 14px;
      text-align: center;
      height: 18px;
      min-height: 18px;
    }
  </style>
</head>
<body>
  <form class="login-container" id="loginForm" novalidate>
    <h2>Sign In</h2>
    <div class="input-group">
      <input type="email" id="email" placeholder="Email" required />
    </div>
    <div class="input-group">
      <input type="password" id="password" placeholder="Password" required minlength="6" />
    </div>
    <button type="submit" class="sign-in-btn">Sign In</button>
    <div class="error-message" id="errorMsg" role="alert" aria-live="polite"></div>
  </form>

  <script>
    const form = document.getElementById('loginForm');
    const emailInput = document.getElementById('email');
    const passwordInput = document.getElementById('password');
    const errorMsg = document.getElementById('errorMsg');
    const emailPattern = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

    form.addEventListener('submit', event => {
      event.preventDefault();
      errorMsg.textContent = '';

      const email = emailInput.value.trim();
      const password = passwordInput.value;

      if (!email || !password) {
        errorMsg.textContent = 'Please fill in all fields.';
        return;
      }

      if (!emailPattern.test(email)) {
        errorMsg.textContent = 'Please enter a valid email address.';
        return;
      }

      if (password.length < 6) {
        errorMsg.textContent = 'Password must be at least 6 characters.';
        return;
      }

      alert('Login successful!');
      form.reset();
    });
  </script>
</body>
</html>

Snippet actions

Geri

Updated: 2026-08-17 14:32

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