body {
    margin: 0;
    height: 100vh;
    background: #e9eef5;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif;
}

.container {
    display: flex;
    width: 800px;
    background: #fff;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0,0,0,.15);
}

.image {
    width: 45%;
    background: rgb(122, 144, 206);
    display: flex;
    justify-content: center;
    align-items: center;
}

.image img {
    max-width: 70%;
}

.form {
    width: 55%;
    padding: 50px;
}

h2 {
    margin: 0;
    color: #1e3a8a;
        text-align: center;
}

p {
    color: #555;
    margin-bottom: 30px;
    text-align: center;
}

input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 8px;
    border: 1px solid #ccc;
}

button {
    width: 100%;
    padding: 14px;
    border-radius: 10px;
    border: none;
    background: #24324a;
    color: white;
    font-size: 16px;
}

.error {
    color: red;
    margin-bottom: 15px;
}

/* ===============================
   RESPONSIVE - CELULARES
   =============================== */
@media (max-width: 768px) {

    body {
        padding: 20px;
        height: auto;
    }

    .container {
        flex-direction: column; /* imagen arriba */
        width: 100%;
        max-width: 420px;
        border-radius: 16px;
    }

    .image {
        width: 100%;
        padding: 25px 0;
    }

    .image img {
        max-width: 120px;
    }

    .form {
        width: 100%;
        padding: 30px 25px;
    }

    h2, p {
        text-align: center;
    }
}

@media (max-width: 480px) {
    button {
        font-size: 18px;
        padding: 16px;
    }
}