/* RESET BÁSICO */
* {
    box-sizing: border-box;
}

body {
    background-color: #050505; /* Negro profundo */
    color: #f0f0f0; /* Blanco roto para lectura fácil */
    font-family: 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    line-height: 1.6;
}

/* HEADER Y NAVEGACIÓN */
header {
    background-color: #000;
    border-bottom: 4px solid #b30000; /* Rojo sangre */
    padding: 20px 0;
    text-align: center;
}

header h1 {
    color: #b30000;
    font-size: 3.5rem;
    margin: 0;
    letter-spacing: 8px;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 20px 0 0 0;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    text-transform: uppercase;
    transition: color 0.3s;
}

nav a:hover {
    color: #b30000;
}

/* CONTENIDO PRINCIPAL */
main {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

h2, h3 {
    color: #b30000;
}

.img-fluida {
    max-width: 100%;
    height: auto;
    border: 1px solid #333;
}

/* FORMULARIOS (Requisito 6 y 7) */
form {
    background-color: #111;
    padding: 25px;
    border-radius: 5px;
    border: 1px solid #222;
}

label {
    display: block;
    margin-top: 15px;
    font-weight: bold;
}

input[type="text"],
input[type="email"],
select {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    background: #222;
    border: 1px solid #444;
    color: white;
}

fieldset {
    margin-top: 20px;
    border: 1px solid #b30000;
    padding: 15px;
}

button {
    background-color: #b30000;
    color: white;
    border: none;
    padding: 10px 20px;
    margin-top: 20px;
    cursor: pointer;
    font-weight: bold;
    text-transform: uppercase;
}

button:hover {
    background-color: #ff0000;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 40px 0;
    background-color: #000;
    border-top: 1px solid #222;
    margin-top: 50px;
}

footer a {
    color: #b30000;
}