Interactive Neon UI login form | HTML, CSS & JavaScript

<div class="login-container">
        <form class="login-form" id="loginForm">
            <h2>Access Terminal</h2>
            <p class="subtitle">Please authenticate to continue</p>
            
            <div class="notification-container" id="notification">
                <span class="msg-text"></span>
            </div>
            
            <div class="input-group">
                <input type="text" id="username" required placeholder=" ">
                <label for="username">Username</label>
                <div class="input-bar"></div>
            </div>
            
            <div class="input-group">
                <input type="password" id="password" required placeholder=" ">
                <label for="password">Password</label>
                <div class="input-bar"></div>
            </div>
            
            <div class="form-actions">
                <a href="#" class="forgot-pass">Forgot Access?</a>
            </div>

<button type="submit" class="submit-btn" id="submitBtn">
                <span class="btn-text">Initialize Session</span>
            </button>
        </form>
    </div>

:root {
    --bg-color: #05070b;
    --tube-color: #f3faff;
    --neon-glow: #00f0ff;
    --neon-dark: #0066cc;
    --text-muted: #6272a4;

/* New Status Colors */
    --neon-success: #39ff14;
    --neon-failed: #ff3131;
}

/* --- [Existing CSS remains exactly the same as previous step] --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: 'Courier New', Courier, monospace;
    overflow: hidden;
    perspective: 1000px;
}

.light-fixture {
    position: absolute;
    top: 0;
    display: flex;
    justify-content: center;
    width: 100%;
    z-index: 10;
}

.tube {
    width: 280px;
    height: 6px;
    background: var(--tube-color);
    border-radius: 0 0 4px 4px;
    box-shadow: 0 2px 10px #fff, 0 4px 25px var(--neon-glow), 0 10px 50px var(--neon-dark);
    animation: flicker 4s infinite alternate;
}

.bracket {
    width: 12px;
    height: 10px;
    background: #222;
    border-bottom: 2px solid #444;
}

.bracket.left {
    border-radius: 0 0 0 4px;
}

.bracket.right {
    border-radius: 0 0 4px 0;
}

.light-beam {
    position: absolute;
    top: 6px;
    width: 450px;
    height: 600px;
    background: linear-gradient(to bottom, rgba(0, 240, 255, 0.12) 0%, rgba(0, 102, 204, 0.03) 50%, rgba(0, 0, 0, 0) 100%);
    clip-path: polygon(30% 0%, 70% 0%, 100% 100%, 0% 100%);
    pointer-events: none;
    animation: beam-pulse 4s infinite alternate;
}

.login-container {
    z-index: 5;
    transform: rotateX(5deg);
    transition: transform 0.5s ease;
}

.login-container:hover {
    transform: rotateX(0deg) scale(1.02);
}

.login-form {
    background: rgba(10, 15, 26, 0.75);
    padding: 50px 40px;
    border-radius: 16px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 240, 255, 0.15);
    box-shadow: 0 -4px 30px rgba(0, 240, 255, 0.2), 0 20px 50px rgba(0, 0, 0, 0.9);
    width: 360px;
}

h2 {
    color: #fff;
    font-size: 1.6rem;
    letter-spacing: 2px;
    margin-bottom: 6px;
    text-transform: uppercase;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 30px;
}

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

.input-group input {
    width: 100%;
    padding: 12px 10px 10px 5px;
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.input-group label {
    position: absolute;
    top: 12px;
    left: 5px;
    color: var(--text-muted);
    pointer-events: none;
    transition: 0.3s ease all;
    font-size: 0.9rem;
}

.input-bar {
    position: relative;
    display: block;
    width: 100%;
}

.input-bar::before {
    content: '';
    height: 2px;
    width: 0;
    bottom: 0;
    position: absolute;
    background: var(--neon-glow);
    box-shadow: 0 0 10px var(--neon-glow);
    transition: 0.4s ease all;
    left: 50%;
}

.input-group input:focus~label,
.input-group input:not(:placeholder-shown)~label {
    top: -15px;
    font-size: 0.75rem;
    color: var(--neon-glow);
    letter-spacing: 1px;
}

.input-group input:focus~.input-bar::before {
    width: 100%;
    left: 0;
}

.input-group input:focus {
    border-bottom-color: transparent;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: -10px;
    margin-bottom: 30px;
}

.forgot-pass {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-decoration: none;
    transition: color 0.2s;
}

.forgot-pass:hover {
    color: var(--neon-glow);
}

.submit-btn {
    width: 100%;
    padding: 14px;
    background: transparent;
    border: 1px solid var(--neon-glow);
    border-radius: 4px;
    color: var(--neon-glow);
    font-family: inherit;
    font-weight: bold;
    font-size: 0.9rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
}

.submit-btn:hover {
    background: var(--neon-glow);
    color: #000;
    box-shadow: 0 0 30px var(--neon-glow);
}

@keyframes flicker {

0%,
    19%,
    21%,
    23%,
    25%,
    54%,
    56%,
    100% {
        opacity: 1;
        box-shadow: 0 2px 10px #fff, 0 4px 25px var(--neon-glow), 0 10px 50px var(--neon-dark);
    }

20%,
    24%,
    55% {
        opacity: 0.6;
        box-shadow: 0 2px 5px #fff, 0 4px 10px var(--neon-dark);
    }
}

@keyframes beam-pulse {

0%,
    19%,
    21%,
    23%,
    25%,
    54%,
    56%,
    100% {
        opacity: 1;
    }

20%,
    24%,
    55% {
        opacity: 0.4;
    }
}

/* --- NEW: Interactive Notification Banner Elements --- */
.notification-container {
    max-height: 0;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border-radius: 6px;
    font-size: 0.8rem;
    letter-spacing: 1px;
    margin-bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
}

/* Dynamic State Triggers via JS classes */
.notification-container.show-success {
    max-height: 50px;
    opacity: 1;
    transform: translateY(0);
    padding: 12px;
    margin-bottom: 25px;
    background: rgba(57, 255, 20, 0.08);
    border-color: var(--neon-success);
    color: var(--neon-success);
    box-shadow: 0 0 15px rgba(57, 255, 20, 0.2);
}

.notification-container.show-failed {
    max-height: 50px;
    opacity: 1;
    transform: translateY(0);
    padding: 12px;
    margin-bottom: 25px;
    background: rgba(255, 49, 49, 0.08);
    border-color: var(--neon-failed);
    color: var(--neon-failed);
    box-shadow: 0 0 15px rgba(255, 49, 49, 0.2);
}

/* Loading State on Button */
.submit-btn.loading {
    color: transparent;
    pointer-events: none;
}

.submit-btn.loading::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-top: -10px;
    margin-left: -10px;
    border: 2px solid transparent;
    border-top-color: var(--neon-glow);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Testing Dashboard Styling */
.demo-controls {
    position: absolute;
    bottom: 20px;
    display: flex;
    gap: 10px;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.demo-controls p {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.demo-controls button {
    background: #111;
    color: #fff;
    border: 1px solid #333;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.7rem;
}

.demo-controls button:hover {
    background: #222;
    border-color: #50fa7b;
}

document.getElementById('loginForm').addEventListener('submit', function(e) {
    e.preventDefault(); // Stop standard page reload
    
    const submitBtn = document.getElementById('submitBtn');
    const usernameInput = document.getElementById('username').value;
    
    // Trigger loading spinner decoration
    submitBtn.classList.add('loading');
    clearNotification();

// Simulating a server check delays
    setTimeout(() => {
        submitBtn.classList.remove('loading');
        
        // Simple logic for standard form submission:
        // If they type "admin", grant access. Otherwise, fail.
        if (usernameInput.toLowerCase() === 'admin') {
            displayStatus('success', 'ACCESS GRANTED. DEPLOYING SESSION.');
        } else {
            displayStatus('failed', 'ERR: INVALID CREDENTIALS.');
        }
    }, 80000 / 100); // 800ms simulation
});

// Helper Function to cleanly inject messages
function displayStatus(type, message) {
    const notifyElement = document.getElementById('notification');
    const textElement = notifyElement.querySelector('.msg-text');
    
    clearNotification();
    textElement.textContent = message;
    
    if (type === 'success') {
        notifyElement.classList.add('show-success');
    } else if (type === 'failed') {
        notifyElement.classList.add('show-failed');
    }
}

function clearNotification() {
    const notifyElement = document.getElementById('notification');
    notifyElement.classList.remove('show-success', 'show-failed');
}

// Global hook specifically for the bottom layout testing toggles
function triggerDemo(state) {
    if (state === 'success') {
        displayStatus('success', 'SUCCESS: TERMINAL LINK ESTABLISHED.');
    } else {
        displayStatus('failed', 'CRITICAL ERROR: CONNECTION TIMEOUT.');
    }
}

- Interactive Neon UI login form

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