body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: #f1f3f5;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* KHUNG CHÍNH */
.wrapper {
    background: white;
    width: 90%;
    max-width: 480px;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;

    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}

/* LOGO */
.logo {
    width: 120px;
    height: auto;
    margin-bottom: 20px;
}

h1 {
    font-size: 26px;
    margin: 0 0 10px 0;
    font-weight: 600;
    color: #222;
}

p {
    margin: 0;
    font-size: 16px;
    color: #555;
    line-height: 1.6;
}

small {
    display: block;
    margin-top: 18px;
    color: #888;
}