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

/* Page */
body {
    font-family: Arial, Helvetica, sans-serif;
    background: #111827;
    color: #ffffff;
    padding: 20px;

    display: flex;
    justify-content: center;
    align-items: center;

    height: 100vh;
}

@media (max-width: 480px) {

    h1 {
        font-size: 1.6rem;
    }

    .container {
        padding: 30px;
    }

}

/* Card */
.container {
    background: #1f2937;
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    width: 90%;
    max-width: 420px;

    box-shadow: 0 10px 30px rgba(0,0,0,.3);
}

/* Heading */
h1 {
    font-size: 2rem;
    margin-bottom: 15px;
}

/* Text */
p {
    color: #d1d5db;
    margin-bottom: 30px;
    line-height: 1.5;
}

/* Button */
button {
    width: 100%;
    padding: 15px;
    min-height: 50px;

    border: none;
    border-radius: 10px;

    background: #3b82f6;
    color: white;

    font-size: 1rem;
    font-weight: bold;

    cursor: pointer;

    transition: .2s;
}

button:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}