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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(135deg, #0f172a, #2563eb);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    text-align: center;
    max-width: 700px;
    padding: 2rem;
}

h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

h2 {
    font-size: 2rem;
    color: #93c5fd;
    margin-bottom: 1.5rem;
}

p {
    font-size: 1.2rem;
    line-height: 1.7;
    color: #e5e7eb;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    p {
        font-size: 1rem;
    }
}


.back-btn {
    display: inline-block;
    margin-top: 2rem;
    margin-bottom: 2rem;
    padding: 10px 18px;
    color: #fff;
    text-decoration: none;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50px;
    transition: 0.3s;
}

.back-btn:hover {
    background: #fff;
    color: #2563eb;
}