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

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, Helvetica, sans-serif;
    background: repeating-linear-gradient(45deg, #fdd835, #fdd835 40px, #212121 40px, #212121 80px);
    color: white;
    text-align: center;
}

.container {
    background-color: rgba(0, 0, 0, 0.85);
    padding: 50px 80px;
    border-radius: 10px;
    border: 4px solid #fdd835;
    box-shadow: 0 0 20px black;
}

.helmet {
    font-size: 60px;
    margin-bottom: 20px;
}

h1 {
    font-size: 40px;
    letter-spacing: 3px;
    margin-bottom: 15px;
}

p {
    font-size: 18px;
    opacity: 0.8;
    margin-bottom: 30px;
}

.back {
    color: #fff;
    text-decoration: none;
    font-size: 20px;
    padding: 10px 20px;
    border-radius: 20px;
    transition: 
        transform 0.3s ease,
        box-shadow 0.3s ease,
        background 0.3s ease;
    background: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.08));
}

.back:hover {
    background: linear-gradient(135deg, #fdd835, #fdd835);
    box-shadow:
    0 0 10px rgba(236, 240, 4, 0.5),
    0 0 20px rgba(236, 240, 4, 0.4),
    0 0 40px rgba(236, 240, 4, 0.2);
    transform: translateY(-2px) scale(1.03);
    backdrop-filter: blur(6px);
}