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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f5f5f5;
            line-height: 1.6;
            display: flex;
            justify-content: center;
            min-height: 100vh;
            color: #2c3e50;
        }

        .container {
            width: 100%;
            max-width: 500px;
            padding: 30px;
            margin: 20px;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        h1 {
            color: #000;
            text-align: center;
            margin-bottom: 14px;
            padding-bottom: 10px;
            position: relative;
            font-size: 1.8em;
        }

        h1::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 3px;
            background: #f5f5f5;
            border-radius: 2px;
        }

        h2 {
            color: #34495e;
            margin-top: 30px;
            text-align: center;
            font-size: 1.1em;
            margin-bottom: 20px;
        }

        video {
            width: 100%;
            height: auto;
            display: block;
            margin: 30px auto;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }

        p {
            color: #333;
            margin-bottom: 25px;
            padding: 0 15px;
            text-align: center;
            font-size: 1.1em;
            line-height: 1.3;
        }

        .highlight {
            color: #3498db;
            font-weight: bold;
        }

        @media (max-width: 520px) {
            .container {
                padding: 20px;
                margin: 10px;
            }
            
            h1 {
                font-size: 1.4em;
            }

            h2 {
                font-size: 1.1em;
            }

            p {
                font-size: 1em;
                padding: 0 10px;
            }
        }