* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #0a0a0a;
    color: #e0e0e0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
}

/* --- Panel lateral --- */

.sidebar {
    width: 240px;
    flex-shrink: 0;
    background-color: #111;
    border-right: 1px solid #232323;
    padding: 24px 0;
}

.sidebar .marca {
    display: block;
    padding: 0 20px 20px;
    font-size: 1.3rem;
    font-weight: 700;
    color: #f0f0f0;
    text-decoration: none;
    border-bottom: 1px solid #232323;
    margin-bottom: 16px;
}

.sidebar .seccion-titulo {
    padding: 0 20px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #666;
    margin-bottom: 8px;
}

.sidebar .app {
    margin-bottom: 8px;
}

.sidebar .app-nombre {
    display: block;
    padding: 10px 20px;
    color: #cfcfcf;
    font-weight: 600;
    font-size: 0.95rem;
}

.sidebar .app-links {
    display: flex;
    flex-direction: column;
}

.sidebar .app-links a {
    padding: 6px 20px 6px 36px;
    color: #999;
    text-decoration: none;
    font-size: 0.9rem;
}

.sidebar .app-links a:hover,
.sidebar .app-links a.activo {
    color: #4CAF50;
    background-color: #1a1a1a;
}

/* --- Contenido principal --- */

.contenido {
    flex: 1;
    padding: 40px 32px;
    max-width: 780px;
}

h1 {
    color: #4CAF50;
    font-size: 2rem;
    margin-bottom: 8px;
}

h2 {
    color: #8BC34A;
    font-size: 1.2rem;
    margin-top: 32px;
    margin-bottom: 12px;
}

p, li {
    color: #c0c0c0;
    margin-bottom: 12px;
}

ul {
    padding-left: 24px;
}

a {
    color: #4CAF50;
}

.tagline {
    color: #9e9e9e;
    font-size: 1.1rem;
    margin-bottom: 32px;
}

.fecha {
    color: #888;
    font-size: 0.9rem;
    margin-bottom: 24px;
}

footer {
    margin-top: 48px;
    color: #666;
    font-size: 0.85rem;
}

/* --- Responsivo: en pantallas angostas, el panel se acomoda arriba --- */

@media (max-width: 640px) {
    body {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid #232323;
    }
}