/* --- BASE GENERAL --- */
body {
    font-family: 'Montserrat', Arial, sans-serif;
    background: #f6f6f6;
    margin: 0;
    color: #222;
}

/* --- NAV --- */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    background: #fff;
    height: 60px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.logo-img {
    height: 80px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-links a {
    color: #000;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #ff6f3c;
}

/* --- FORMULARIO DE ENVÍO DE LIBRO --- */
.formulario-libro {
    max-width: 600px;
    margin: 60px auto;
    padding: 30px;
    background: #fff;
    border: 2px solid #ff6f3c;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.formulario-libro h1 {
    text-align: center;
    color: #ff6f3c;
    margin-bottom: 30px;
}

.formulario-libro label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.formulario-libro input,
.formulario-libro textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
}

.formulario-libro button {
    background-color: #ff6f3c;
    color: #fff;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    width: 100%;
    font-weight: bold;
}

.formulario-libro button:hover {
    background-color: #e65c29;
}

/* --- RESPONSIVIDAD --- */
@media (max-width: 768px) {
    .nav-links {
        gap: 16px;
    }

    .logo-img {
        height: 60px;
    }

    .formulario-libro {
        padding: 20px;
    }
}


/* --- MODO OSCURO --- */
body.dark-mode {
    background: #121212;
    color: #eee;
}

body.dark-mode nav {
    background: #1f1f1f;
    box-shadow: 0 2px 8px rgba(255, 111, 60, 0.3);
}

body.dark-mode .nav-links a {
    color: #ddd;
}

body.dark-mode .nav-links a:hover {
    color: #ff6f3c;
}

body.dark-mode .sobre-nosotros {
    background: #1e1e1e;
    border-color: #ff6f3c;
    box-shadow: 0 4px 20px rgba(255, 111, 60, 0.3);
    color: #ddd;
}

body.dark-mode .sobre-nosotros h1 {
    color: #ff6f3c;
}

body.dark-mode .sobre-nosotros h2 {
    color: #eee;
}

body.dark-mode .sobre-nosotros p {
    color: #ccc;
}

body.dark-mode .formulario-libro {
    background: #1e1e1e;
    border-color: #ff6f3c;
    box-shadow: 0 4px 20px rgba(255, 111, 60, 0.3);
    color: #ddd;
}

/* --- RESPONSIVIDAD --- */
@media (max-width: 1024px) {
    .formulario-libro {
        max-width: 90%;
        padding: 25px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .logo-img {
        height: 60px;
    }

    .formulario-libro {
        padding: 20px;
        margin: 40px auto;
    }
}

@media (max-width: 480px) {
    nav {
        flex-direction: column;
        height: auto;
        padding: 10px;
    }

    .nav-links {
        gap: 12px;
        flex-direction: column;
        align-items: center;
    }

    .formulario-libro {
        padding: 15px;
        margin: 30px 10px;
    }

    .formulario-libro button {
        font-size: 0.9rem;
        padding: 10px 16px;
    }
}