/* Estilos globales */
body {
    font-family: 'Share Tech Mono', monospace;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background: #222;
    color: #fff;
    text-align: center;
    padding: 20px;
}

nav {
    background: #444;
    padding: 10px;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 0;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #1abc9c;
}

main {
    padding: 20px;
}

.columna {
    background: #fff;
    padding: 15px;
    margin: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

footer {
    background: #222;
    color: #fff;
    text-align: center;
    padding: 10px;
    position: fixed;
    bottom: 0;
    width: 100%;
}

/* Login box */
.login-box {
    max-width: 400px;
    margin: 50px auto;
    padding: 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.login-box form {
    display: flex;
    flex-direction: column;
}

.login-box label {
    margin: 10px 0 5px;
}

.login-box input {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.login-box button {
    margin-top: 15px;
    padding: 10px;
    background: #1abc9c;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.login-box button:hover {
    background: #16a085;
}