* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    height: 100vh;
    background: linear-gradient(135deg, #032040, #0d2366, #1178ba);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.container {
    text-align: center;
    padding: 40px;
}

.error-box h1 {
    font-size: 140px;
    font-weight: 800;
    letter-spacing: 10px;
    animation: float 4s ease-in-out infinite;
}

.error-box h2 {
    font-size: 32px;
    margin-top: -10px;
}

.error-box p {
    max-width: 480px;
    margin: 20px auto 30px;
    font-size: 16px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    background: #00adff;
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 25px rgba(0, 173, 255, 0.4);
}

.btn:hover {
    background: #fff;
    color: #032040;
    transform: translateY(-3px);
}

/* Floating Animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .error-box h1 {
        font-size: 100px;
    }

    .error-box h2 {
        font-size: 24px;
    }

    .error-box p {
        font-size: 14px;
    }
}