<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Cool Modern Style - Strict List Layout</title>
    <style>
        /* Global Reset & Variables */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }

        :root {
            --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-border: rgba(255, 255, 255, 0.1);
            --accent-glow: #6366f1;
            --accent-cyan: #06b6d4;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
        }

        body {
            background: var(--bg-gradient);
            color: var(--text-main);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 2rem;
        }

        /* Glassmorphism Card Container */
        .card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: 24px;
            padding: 3rem;
            max-width: 450px;
            width: 100%;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 30px 60px rgba(99, 102, 241, 0.15);
            border-color: rgba(99, 102, 241, 0.4);
        }

        /* Typography */
        h1 {
            font-size: 2.25rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
            background: linear-gradient(to right, var(--text-main), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.05em;
        }

        p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.6;
            margin-bottom: 2rem;
        }

        /* Strict Top-to-Bottom List Styling */
        .cool-list {
            list-style: none; /* Removes standard bullet points */
            margin-bottom: 2rem;
            display: block; /* Forces block behavior */
        }

        .cool-list li {
            display: block; /* Strictly forces each item onto its own line */
            margin-bottom: 0.75rem; /* Space below each list item */
        }

        /* The styled label inside the list item */
        .tag-item {
            display: inline-block; /* Keeps the background wrapped nicely around the text */
            background: rgba(99, 102, 241, 0.15);
            color: #a5b4fc;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            border: 1px solid rgba(99, 102, 241, 0.2);
        }

        /* Interactive Elements */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            padding: 1rem;
            background: linear-gradient(90deg, var(--accent-glow), #4f46e5);
            color: #ffffff;
            border: none;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
        }

        .btn:hover {
            opacity: 0.95;
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
            transform: scale(1.01);
        }
    </style>
</head>
<body>

    <div class="card">
        <!-- Built using explicit HTML list tags so they cannot stay side-by-side -->
        <ul class="cool-list">
            <li><span class="tag-item">✓ Design Layout</span></li>
            <li><span class="tag-item">✓ UI/UX Architecture</span></li>
            <li><span class="tag-item">✓ Responsive Structure</span></li>
        </ul>

        <h1>Interface Style.</h1>
        <p>This layout pairs a frosted-glass backdrop filter with deep, cosmic gradients and vibrant neon accents to create a sleek, high-end aesthetic.</p>
        <button class="btn">Explore System</button>
    </div>

</body>
</html>
