*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --bg: #0f172a; --bg2: #1e293b; --accent: #38bdf8;
      --accent-glow: rgba(56,189,248,0.32);
      --white: #ffffff; --white-soft: #e2e8f0; --muted2: #94a3b8; --slate: #64748b;
      --border-nav: rgba(148,163,184,0.08);
      --font: 'Oxanium', sans-serif; --mono: 'Space Mono', monospace;
      /* fondo claro de la zona de lectura del post (misma paleta que las
         secciones claras de la home, echocontrol-web/index.html) */
      --bg-light: #f8fafc; --bg-light2: #f1f5f9;
      --light-text: #0f172a; --light-text-sub: #475569; --light-text-mut: #64748b;
      --light-accent: #0284c7; --border-light: #e2e8f0;
    }
    html { scroll-behavior: smooth; }
    body { background: var(--bg); color: var(--white-soft); font-family: var(--font); line-height: 1.7; }

    nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 500;
      padding: 1rem max(1.25rem, calc(50% - 530px));
      display: flex; align-items: center; justify-content: space-between;
      background: rgba(15,23,42,0.92); backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-nav);
    }
    .nav-logo { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; color: var(--white); }
    .nav-logo img { height: 34px; width: auto; }
    .nav-logo-text { font-family: var(--font); font-weight: 800; font-size: 1.25rem; letter-spacing: 0.08em; }
    .nav-logo-text span { color: var(--accent); }
    .nav-btn {
      font-family: var(--font); font-size: 0.82rem; font-weight: 700;
      letter-spacing: 0.12em; text-transform: uppercase;
      color: var(--white); background: var(--accent);
      border: none; padding: 0.65rem 1.6rem; text-decoration: none; border-radius: 4px;
      transition: background 0.2s, box-shadow 0.2s;
    }
    .nav-btn:hover { background: #7dd3fc; box-shadow: 0 4px 24px var(--accent-glow); }

    main { padding: 7rem 1.5rem 5rem; }
    /* El post NO centra una columna de 680px suelta en todo el viewport — eso
       deja huecos enormes y simetricos a ambos lados que se leen como un
       error de maquetacion. En vez de eso, el post arranca en el mismo borde
       izquierdo que usa <nav> (misma formula de padding), igual que ya hacen
       /guides y el resto del sitio, y dentro de esa franja ancha el texto se
       limita a 680px de medida de lectura solo por la derecha. */
    main.post-main {
      padding: 7rem 1.5rem 5rem;
      background: var(--bg-light);
    }
    .wrap-post { max-width: 720px; margin: 0 auto; }
    /* Cabecera del post (crumbs/h1/byline): a todo el ancho del layout
       (1040px, igual que wrap-post-layout de abajo), por encima de la
       columna de texto y el sidebar — no se parte la columna todavia, eso
       empieza justo despues, en post-body. */
    .wrap-post-header { max-width: 1040px; margin: 0 auto; }
    .wrap-post-layout {
      max-width: 1040px; margin: 0 auto; display: grid;
      grid-template-columns: minmax(0, 720px) 260px; gap: 3rem; align-items: start;
    }
    .wrap-wide { max-width: 980px; margin: 0 auto; }

    /* Columna de prosa centrada (no anclada a la izquierda como /guides):
       para texto continuo interesa medida de lectura corta y simetria, no
       alinear con el borde del nav — asi es como la home centra tambien sus
       secciones claras ("THE PROBLEM"), en vez de anclarlas a la izquierda.
       La zona de lectura del post pasa a fondo claro (misma paleta que esas
       secciones); el resto de la pagina (nav, footer) se queda en el tema
       oscuro de siempre. */
    .post-main .crumbs { color: var(--light-text-mut); }
    .post-main .crumbs a { color: var(--light-text-sub); }
    .post-main .crumbs a:hover { color: var(--light-accent); }
    .post-main .p-eyebrow { color: var(--light-accent); }
    .post-main .p-h1 { color: var(--light-text); }
    .post-main .byline { color: var(--light-text-mut); border-bottom-color: var(--border-light); }
    .post-main .byline a { color: var(--light-text-sub); }
    .post-main .byline a:hover { color: var(--light-accent); }
    .post-main .byline-avatar { border-color: var(--border-light); }
    .post-main .post-body { color: var(--light-text-sub); }
    .post-main .post-body h2, .post-main .post-body h3 { color: var(--light-text); }
    .post-main .post-body a { color: var(--light-accent); }
    .post-main .post-body code { background: var(--bg-light2); color: var(--light-text); }
    .post-main .post-body pre { background: var(--bg-light2); }
    .post-main .post-body strong { color: var(--light-text); }
    .post-main .post-body blockquote { border-left-color: var(--light-accent); color: var(--light-text); }
    .post-main .post-body img { border-color: var(--border-light); }
    .post-main .post-cta { border-top-color: var(--border-light); }
    /* Sidebar: reglas compartidas por post-main (posts) y blog-main (hub +
       indices de categoria) — mismo componente, mismo tema claro. */
    .post-main .sidebar-section h2, .blog-main .sidebar-section h2 { color: var(--light-text); }
    .post-main .sidebar-related a, .blog-main .sidebar-related a { border-color: var(--border-light); color: var(--light-text-sub); background: #fff; }
    .post-main .sidebar-related a:hover, .blog-main .sidebar-related a:hover { border-color: var(--light-accent); }
    .post-main .sidebar-related .n, .blog-main .sidebar-related .n { color: var(--light-text-mut); }
    .post-main .sidebar-categories a, .blog-main .sidebar-categories a { color: var(--light-text-sub); }
    .post-main .sidebar-categories a:hover, .post-main .sidebar-categories a.active,
    .blog-main .sidebar-categories a:hover, .blog-main .sidebar-categories a.active { color: var(--light-accent); }
    .post-main .sidebar-categories .n, .blog-main .sidebar-categories .n { color: var(--light-text-mut); }

    /* Hub, indices de categoria y paginas de autor: misma zona de lectura
       clara que el post, por consistencia (mismo fondo, mismos tokens). */
    main.blog-main { background: var(--bg-light); }
    .blog-main .crumbs { color: var(--light-text-mut); }
    .blog-main .crumbs a { color: var(--light-text-sub); }
    .blog-main .crumbs a:hover { color: var(--light-accent); }
    .blog-main .blog-hero h1 { color: var(--light-text); }
    .blog-main .blog-hero p { color: var(--light-text-sub); }
    .blog-main .post-card { border-bottom-color: var(--border-light); }
    .blog-main .post-thumb { border-color: var(--border-light); }
    .blog-main .post-card a.title { color: var(--light-text); }
    .blog-main .post-card a.title:hover { color: var(--light-accent); }
    .blog-main .post-card .meta { color: var(--light-text-mut); }
    .blog-main .post-card .meta a { color: var(--light-text-mut); }
    .blog-main .post-card .meta a:hover { color: var(--light-accent); }
    .blog-main .post-card .excerpt { color: var(--light-text-sub); }
    .blog-main .empty-state { color: var(--light-text-sub); }
    .blog-main .qa-item .q { color: var(--light-accent); }
    .blog-main .qa-item .a { color: var(--light-text-sub); }
    .blog-main .author-intro strong { color: var(--light-text); }
    .blog-main .author-intro blockquote { border-left-color: var(--light-accent); color: var(--light-text); }
    .blog-main .section-divider { background: linear-gradient(to right, transparent, rgba(2,132,199,0.28) 50%, transparent); }
    .blog-main .posts-heading { color: var(--light-accent); }
    .blog-main .author-avatar { border-color: var(--border-light); }
    .blog-main .guides-crosslink { border-color: rgba(2,132,199,0.3); background: rgba(2,132,199,0.06); }
    .blog-main .guides-crosslink h3 { color: var(--light-text); }
    .blog-main .guides-crosslink p { color: var(--light-text-sub); }

    .crumbs { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; margin-bottom: 1.6rem; color: var(--slate); }
    .crumbs a { color: var(--muted2); text-decoration: none; }
    .crumbs a:hover { color: var(--accent); }

    .p-eyebrow {
      font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.24em;
      text-transform: uppercase; color: var(--accent); margin-bottom: 1rem; display: block;
    }
    .p-h1 {
      font-size: clamp(1.8rem, 5vw, 2.6rem); font-weight: 800;
      letter-spacing: -0.02em; line-height: 1.2; color: var(--white); margin-bottom: 1rem;
    }
    .byline {
      font-family: var(--mono); font-size: 0.75rem; color: var(--slate);
      letter-spacing: 0.04em; margin-bottom: 2.6rem; padding-bottom: 1.6rem;
      border-bottom: 1px solid rgba(148,163,184,0.12);
    }
    .byline a { color: var(--muted2); text-decoration: none; }
    .byline a:hover { color: var(--accent); }
    .cat-chip {
      display: inline-block; padding: 0.15rem 0.65rem; border-radius: 20px;
      font-family: var(--mono); font-size: 0.68rem; font-weight: 700;
      letter-spacing: 0.04em; text-transform: uppercase;
      border: 1px solid; text-decoration: none !important; transition: filter 0.15s;
      vertical-align: middle;
    }
    .cat-chip:hover { filter: brightness(1.25); }
    .byline-avatar {
      width: 36px; height: 36px; border-radius: 50%; object-fit: cover;
      vertical-align: middle; margin-right: 0.6rem; border: 1px solid rgba(148,163,184,0.2);
    }

    .post-body { font-size: clamp(1rem, 4vw, 1.125rem); line-height: 1.75; font-weight: 400; }
    .post-body p { margin: 0 0 1.4rem; }
    .post-body h2 {
      font-size: clamp(1.25rem, 4vw, 1.5rem); font-weight: 700; color: var(--white);
      letter-spacing: -0.01em; margin: 2.6rem 0 1.1rem;
    }
    .post-body h3 { font-size: 1.15rem; font-weight: 700; color: var(--white); margin: 2rem 0 0.9rem; }
    .post-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
    .post-body ul, .post-body ol { margin: 0 0 1.4rem 1.4rem; }
    .post-body li { margin-bottom: 0.4rem; }
    .post-body strong { font-weight: 700; }
    .post-body blockquote, .author-intro blockquote {
      margin: 0 0 1.4rem; padding: 0.2rem 0 0.2rem 1.2rem;
      border-left: 3px solid var(--accent); font-style: italic; color: var(--white);
    }
    .post-body blockquote p, .author-intro blockquote p { margin-bottom: 0.6rem; }
    .post-body blockquote p:last-child, .author-intro blockquote p:last-child { margin-bottom: 0; }
    .post-body img {
      max-width: 100%; height: auto; display: block; border-radius: 8px;
      margin: 0 0 1.4rem; border: 1px solid rgba(148,163,184,0.15);
      cursor: zoom-in;
    }
    .post-body figure.post-figure { margin: 0 0 1.4rem; }
    .post-body figure.post-figure img { margin: 0 0 0.6rem; }
    .post-body figcaption {
      font-family: var(--mono); font-size: 0.8rem; color: var(--slate);
      text-align: center;
    }
    .post-main .post-body figcaption { color: var(--light-text-mut); }
    .lightbox-overlay {
      position: fixed; inset: 0; z-index: 999; background: rgba(15,23,42,0.92);
      display: flex; align-items: center; justify-content: center; padding: 2rem;
      opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
    }
    .lightbox-overlay.show { opacity: 1; pointer-events: auto; }
    .lightbox-overlay img {
      max-width: 100%; max-height: 100%; border-radius: 8px; cursor: zoom-out;
      box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    }
    .post-body code {
      font-family: var(--mono); font-size: 0.88em; background: var(--bg2);
      padding: 0.15rem 0.4rem; border-radius: 3px;
    }
    .post-body pre {
      font-family: var(--mono); background: var(--bg2); padding: 1rem 1.2rem;
      border-radius: 8px; overflow-x: auto; margin: 0 0 1.4rem;
    }
    .post-body pre code { background: none; padding: 0; }

    .post-cta { text-align: center; margin: 3.5rem 0 0; padding-top: 2.5rem; border-top: 1px solid rgba(148,163,184,0.12); }
    .btn-primary {
      display: inline-block; font-family: var(--font); font-size: 0.9rem; font-weight: 700;
      letter-spacing: 0.1em; text-transform: uppercase;
      color: var(--bg); background: var(--accent); padding: 0.9rem 2rem;
      text-decoration: none; border-radius: 6px;
      transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
    }
    .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 40px var(--accent-glow); background: #7dd3fc; }

    .post-sidebar { position: sticky; top: 6.5rem; }
    .sidebar-section { margin-bottom: 2.4rem; }
    .sidebar-section h2 { font-size: 0.95rem; color: var(--white); font-weight: 700; margin-bottom: 1rem; }
    .sidebar-related { display: flex; flex-direction: column; gap: 0.7rem; }
    .sidebar-related a {
      display: block; padding: 0.75rem 0.9rem; border: 1px solid rgba(148,163,184,0.16);
      border-radius: 8px; text-decoration: none; color: var(--white-soft);
      font-size: 0.85rem; line-height: 1.4; transition: border-color 0.2s, transform 0.2s;
    }
    .sidebar-related a:hover { border-color: var(--accent); transform: translateY(-2px); }
    .sidebar-related .n { font-family: var(--mono); font-size: 0.66rem; color: var(--slate); display: block; margin-top: 0.25rem; }
    .sidebar-categories { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.55rem; }
    .sidebar-categories a {
      display: flex; justify-content: space-between; gap: 0.5rem; text-decoration: none;
      color: var(--white-soft); font-size: 0.85rem; padding: 0.2rem 0; transition: color 0.15s;
    }
    .sidebar-categories a:hover, .sidebar-categories a.active { color: var(--accent); }
    .sidebar-categories .n { font-family: var(--mono); font-size: 0.75rem; color: var(--slate); }

    @media (max-width: 900px) {
      .wrap-post-layout { grid-template-columns: 1fr; gap: 0; }
      .post-sidebar {
        position: static; margin-top: 3rem; padding-top: 2.4rem;
        border-top: 1px solid rgba(148,163,184,0.12);
      }
      .post-main .post-sidebar { border-top-color: var(--border-light); }
    }

    /* ── hub / category index / author page ── */
    .blog-hero { max-width: 680px; margin: 0 auto 2.5rem; }
    .blog-hero h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); font-weight: 800; color: var(--white); letter-spacing: -0.02em; margin-bottom: 1rem; }
    .blog-hero p { color: var(--muted2); font-size: 1.05rem; font-weight: 300; }
    /* Hub y categoria meten blog-hero dentro de wrap-post-header (fullwidth,
       1040px) en vez de wrap-wide -- pierde su propio limite de 680px, que
       aqui ya lo da el contenedor. author-page sigue usando blog-hero dentro
       de wrap-wide sin pasar por aqui, conserva los 680px de siempre. */
    .wrap-post-header .blog-hero { max-width: none; margin: 0 0 2.5rem; }
    .author-avatar {
      width: 84px; height: 84px; border-radius: 50%; object-fit: cover;
      margin-bottom: 1.2rem; border: 1px solid rgba(148,163,184,0.2);
    }
    .author-photo {
      max-width: 680px; width: 100%; height: auto; display: block;
      margin: 0 auto 2.6rem; border-radius: 12px;
    }
    .author-intro p { margin-bottom: 1rem; }
    .author-intro p:last-child { margin-bottom: 0; }
    .author-intro strong { font-weight: 700; color: var(--white); }

    .post-list { max-width: 680px; margin: 0 auto; display: flex; flex-direction: column; gap: 1.6rem; }
    .post-card {
      padding-bottom: 1.6rem; border-bottom: 1px solid rgba(148,163,184,0.1);
      display: flex; gap: 1.1rem; align-items: flex-start;
    }
    .post-thumb {
      width: 96px; height: 96px; object-fit: cover; border-radius: 8px; flex-shrink: 0;
      border: 1px solid rgba(148,163,184,0.15);
    }
    .post-card-body { flex: 1; min-width: 0; }
    .post-card a.title { color: var(--white); font-size: 1.2rem; font-weight: 700; text-decoration: none; }
    .post-card a.title:hover { color: var(--accent); }
    .post-card .meta { font-family: var(--mono); font-size: 0.72rem; color: var(--slate); margin: 0.4rem 0 0.6rem; letter-spacing: 0.04em; }
    .post-card .meta a { color: var(--slate); text-decoration: none; }
    .post-card .excerpt { color: var(--muted2); font-size: 0.95rem; font-weight: 300; }
    .empty-state { max-width: 680px; margin: 0 auto; color: var(--muted2); font-size: 0.95rem; font-weight: 300; }

    /* Q&A de perfil (paginas de autor) — profundidad de personalidad/motivaciones */
    .author-qa { max-width: 680px; margin: 2.6rem auto 0; display: flex; flex-direction: column; gap: 1.7rem; }
    .qa-item .q {
      font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.05em;
      text-transform: uppercase; color: var(--accent); margin-bottom: 0.5rem;
    }
    .qa-item .a { font-size: 1rem; line-height: 1.7; font-style: italic; color: var(--white-soft); }
    .section-divider {
      max-width: 680px; margin: 3rem auto 2.6rem; height: 1px;
      background: linear-gradient(to right, transparent, rgba(148,163,184,0.35) 50%, transparent);
    }
    .posts-heading {
      max-width: 680px; margin: 0 auto 1.2rem; font-size: 1.5rem; font-weight: 700; color: var(--accent);
    }

    .guides-crosslink {
      max-width: 680px; margin: 3rem auto 0; display: block; padding: 1.3rem 1.5rem;
      border: 1px solid rgba(56,189,248,0.25); background: rgba(56,189,248,0.05);
      border-radius: 10px; text-decoration: none; color: inherit;
    }
    .guides-crosslink h3 { color: var(--white); font-size: 1rem; font-weight: 700; margin-bottom: 0.3rem; }
    .guides-crosslink p { color: var(--muted2); font-size: 0.88rem; font-weight: 300; }

    footer { padding: 3rem 2rem; text-align: center; border-top: 1px solid rgba(148,163,184,0.08); background: var(--bg); }
    .foot-logo-wrap { display: flex; align-items: center; justify-content: center; gap: 0.6rem; margin-bottom: 1rem; }
    .foot-logo-wrap img { height: 22px; width: auto; opacity: 0.6; }
    .foot-logo-text { font-weight: 800; font-size: 0.95rem; letter-spacing: 0.1em; color: var(--white); }
    .foot-logo-text span { color: var(--accent); }
    .foot-legal-links { margin-bottom: 1rem; }
    .foot-legal-links a {
      font-family: var(--mono); font-size: 0.82rem; color: var(--white-soft);
      letter-spacing: 0.06em; text-decoration: none; margin: 0 0.7rem;
      border-bottom: 1px solid rgba(148,163,184,0.35); padding-bottom: 1px;
      transition: color 0.2s, border-color 0.2s; display: inline-block; line-height: 2;
    }
    .foot-legal-links a:hover { color: var(--accent); border-color: var(--accent); }
    .foot-copy { font-family: var(--mono); font-size: 0.6rem; color: rgba(100,116,139,0.45); }

    @media (max-width: 760px) {
      .nav-logo-text { display: none; }
      main { padding: 6rem 1.15rem 5rem; }
      .post-thumb { width: 64px; height: 64px; }
    }