/* --- Importación de Fuentes --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700;800&family=Roboto+Mono:wght@500&display=swap');

/* --- Paleta de Colores --- */
:root {
    --color-fondo: #f8fafc;
    --color-texto: #475569;
    --color-primario: #4f46e5; /* Indigo */
    --color-primario-oscuro: #4338ca;
    --color-borde: #e2e8f0;
    --color-fondo-tarjeta: #ffffff;
    --color-texto-principal: #1e2e3b;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--color-fondo);
    color: var(--color-texto);
    line-height: 1.65;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden; /* Evita el desbordamiento horizontal */
}

/* --- Encabezado y Logo --- */
header {
    width: 100%;
    background-color: var(--color-fondo-tarjeta);
    border-bottom: 1px solid var(--color-borde);
    padding: 0.75rem 0;
}
.logo-link { display: inline-block; }
.logo-img { height: 150px; width: auto; }

/* --- Contenido Principal --- */
main {
    width: 100%;
    max-width: 1024px;
    padding: 1rem 1rem 3rem; /* Espaciado superior reducido */
    flex-grow: 1;
}

/* --- Página Principal --- */
.ip-display-container {
    text-align: center;
    margin-bottom: 1rem; /* Espacio inferior reducido */
}

.ip-display-container h1 {
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--color-texto-principal);
    margin-bottom: 1.5rem;
    padding: 0.5rem 0; /* Padding superior e inferior reducido */
}
.ip-display-container h1 span {
    font-weight: 700;
    color: var(--color-primario);
}

#ipv4-display {
    font-family: 'Roboto Mono', monospace;
    font-weight: 500;
    font-size: clamp(2.25rem, 7vw, 3.25rem);
    color: var(--color-texto-principal);
    background-color: var(--color-fondo-tarjeta);
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    border: 1px solid var(--color-borde);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
}

#ipv6-display {
    min-height: 24px;
    margin-top: 0.75rem;
}

#copy-button {
    background-color: transparent;
    border: 1px solid var(--color-borde);
    color: var(--color-texto);
    width: 48px;
    height: 48px;
    border-radius: 9999px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease-in-out;
}
#copy-button:hover {
    background-color: var(--color-primario);
    border-color: var(--color-primario);
    color: #ffffff;
}
.hidden {
    display: none !important;
}

/* --- Sección Knowledge Base --- */
.knowledge-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--color-texto-principal);
}
.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.knowledge-card {
    background-color: var(--color-fondo-tarjeta);
    border: 1px solid var(--color-borde);
    border-radius: 0.75rem;
    padding: 1.5rem;
    text-align: left;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.knowledge-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primario);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.07), 0 4px 6px -4px rgba(0, 0, 0, 0.07);
}
.knowledge-card h3 {
    font-weight: 700;
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--color-texto-principal);
}
.knowledge-card ul, .footer-container ul {
    list-style: none;
    padding: 0;
}
.knowledge-card li, .footer-container li {
    margin-bottom: 0.75rem;
}
.knowledge-card a {
    color: var(--color-texto);
    text-decoration: none;
}
.knowledge-card a:hover {
    color: var(--color-primario);
}

/* --- Footer --- */
footer {
    width: 100%;
    background-color: var(--color-fondo-tarjeta);
    border-top: 1px solid var(--color-borde);
    margin-top: auto;
}
.footer-container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 2.5rem 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}
footer h4 {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--color-texto-principal);
}
footer p {
    font-size: 0.95rem;
    color: var(--color-texto);
}
footer a {
    font-size: 0.95rem;
    color: var(--color-primario);
    text-decoration: none;
    font-weight: 500;
}
footer a:hover {
    text-decoration: underline;
    color: var(--color-primario-oscuro);
}
.footer-bottom {
    text-align: center;
    padding: 1.5rem 1rem;
    border-top: 1px solid var(--color-borde);
    font-size: 0.9rem;
}
.footer-bottom a {
    font-weight: 700;
    color: var(--color-primario);
}

/* --- Media Queries para Móviles --- */
@media (max-width: 768px) {
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
}