body {
    font-family: "Poppins", sans-serif;
    background-image: url("colegio.jpg");
    background-size: cover;         /* Ajusta la imagen al tamaño de la pantalla */
    background-position: center;    /* Centra la imagen */
    background-repeat: no-repeat;   /* Evita que se repita */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    backdrop-filter: blur(3px);     /* efecto elegante opcional */
}

/* ======== CONTENEDOR ======== */
.contenedor {
    background-color: #ffffff;
    padding: 40px 60px;
    border-radius: 15px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.15);
    text-align: center;
    width: 100%;
    max-width: 420px;
    border-top: 6px solid #000;
}

/* ======== ENCABEZADO ======== */
header {
    margin-bottom: 20px;
}

.logo {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 10px;
}

h1 {
    font-size: 22px;
    color: #000;
    margin: 5px 0;
    letter-spacing: 1px;
}

.subtitulo {
    font-size: 13px;
    color: #555;
    font-style: italic;
}

/* ======== FORMULARIO ======== */
form {
    margin-top: 20px;
}

form h2 {
    margin-bottom: 20px;
    font-size: 22px;
    color: #000;
    font-weight: 600;
    text-transform: uppercase;
}

/* ======== INPUTS ======== */
input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 15px;
    outline: none;
    transition: all 0.3s ease;
    background-color: #fafafa;
}

input[type="text"]:focus,
input[type="password"]:focus {
    border: 1px solid #000;
    background-color: #fff;
}

/* ======== BOTÓN ======== */
button {
    width: 100%;
    padding: 12px;
    background-color: #000;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
    font-size: 16px;
    margin-top: 10px;
    transition: 0.3s ease;
}

button:hover {
    background-color: #fff;
    color: #000;
    border: 1px solid #000;
}

/* ======== PIE DE PÁGINA ======== */
footer {
    margin-top: 25px;
    font-size: 13px;
    color: #555;
    border-top: 1px solid #eee;
    padding-top: 10px;
}