:root {
      --color-bg: #0a0a0c;
      --color-surface: #121216;
      --color-surface-hover: #18181b;
      --color-border: #27272a;
      --color-border-bright: #3f3f46;
      --color-text-main: #ffffff;
      --color-text-muted: #ffffff; /* Blanco puro en modo oscuro */
      --color-accent: #e11d48;
      --color-accent-glow: rgba(225, 29, 72, 0.25);
      --color-emerald: #10b981;
      --font-display: 'Space Grotesk', system-ui, -apple-system, sans-serif;
      --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
      --container-max: 80rem;
      --radius-lg: 1rem;
      --radius-md: 0.75rem;
      --radius-full: 9999px;
      --transition-fast: 0.2s ease;
    }
:root {
      --color-bg: #0a0a0c;
      --color-surface: #121216;
      --color-surface-hover: #18181b;
      --color-border: #27272a;
      --color-border-bright: #3f3f46;
      --color-text-main: #ffffff;
      --color-text-muted: #ffffff; /* Blanco puro en modo oscuro */
      --color-accent: #e11d48;
      --color-accent-glow: rgba(225, 29, 72, 0.25);
      --color-emerald: #10b981;
      --font-display: 'Space Grotesk', system-ui, -apple-system, sans-serif;
      --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
      --container-max: 80rem;
      --radius-lg: 1rem;
      --radius-md: 0.75rem;
      --radius-full: 9999px;
      --transition-fast: 0.2s ease;
    }

    html[data-theme="light"] {
      --color-bg: #f8fafc;
      --color-surface: #ffffff;
      --color-surface-hover: #f1f5f9;
      --color-border: #e2e8f0;
      --color-border-bright: #cbd5e1;
      --color-text-main: #0f172a;
      --color-text-muted: #64748b; /* Gris legible original en modo claro */
      --color-accent: #e11d48;
      --color-accent-glow: rgba(225, 29, 72, 0.15);
    }

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

    html {
      scroll-behavior: smooth;
      font-synthesis: none;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    body {
      background-color: var(--color-bg);
      color: var(--color-text-main);
      font-family: var(--font-body);
      line-height: 1.6;
      overflow-x: hidden;
      transition: background-color 0.3s ease, color 0.3s ease;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 1.25rem;
    }

    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(10, 10, 12, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--color-border);
      transition: background 0.3s ease;
    }

    /* Menú (Header) más ancho (aprox 80-88% de la pantalla o hasta 92rem) */
    .site-header .container {
      max-width: 92%;
      width: 100%;
      padding: 0 2rem;
    }

    html[data-theme="light"] .site-header {
      background: rgba(248, 250, 252, 0.85);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 4.5rem;
    }

    .skip-link {
      position: absolute;
      left: 1rem;
      top: -4rem;
      z-index: 1000;
      padding: 0.5rem 1rem;
      background: var(--color-surface);
      color: var(--color-text-main);
      border-radius: var(--radius-md);
    }
    .skip-link:focus { top: 1rem; }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      text-decoration: none;
    }

    .logo--claro { display: none !important; }
    html[data-theme="light"] .logo--oscuro { display: none !important; }
    html[data-theme="light"] .logo--claro { display: block !important; }

    .brand-logo img.logo {
      height: 2.25rem;
      width: auto;
      object-fit: contain;
      display: block;
    }

    .nav-menu ul {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-menu li {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-link {
      position: relative;
      display: inline-block;
      font-size: 0.9375rem;
      font-weight: 500;
      white-space: nowrap;
      /* algo más apagado que el texto principal, para que el hover se note */
      color: color-mix(in srgb, var(--color-text-main) 100%, transparent);
      transition: color var(--transition-fast), text-shadow var(--transition-fast);
    }

    /* "Negrita" sin cambiar el ancho */
    .nav-link:hover,
    .nav-link:focus-visible,
    .nav-link.cwp-active {
      color: var(--color-text-main);
      text-shadow: 0 0 0.6px currentColor, 0 0 0.6px currentColor;
    }

    /* Subrayado que no ocupa espacio */
    .nav-link::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: -0.35em;
      height: 2px;
      border-radius: 2px;
      background: var(--color-accent);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.25s ease;
    }

    .nav-link:hover::after,
    .nav-link:focus-visible::after,
    .nav-link.cwp-active::after {
      transform: scaleX(1);
    }

    .nav-link:focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 4px;
      border-radius: 4px;
    }

    @media (prefers-reduced-motion: reduce) {
      .nav-link::after { transition: none; }
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .ctrl-btn {
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      color: var(--color-text-main);
      padding: 0.45rem 0.85rem;
      border-radius: var(--radius-full);
      font-size: 0.8125rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 0.4rem;
      transition: all var(--transition-fast);
    }

    .ctrl-btn:hover {
      border-color: var(--color-border-bright);
      background: var(--color-surface-hover);
    }

    .btn-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.65rem 1.35rem;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 0.9375rem;
      background: var(--color-accent);
      color: #FFFFFF !important;
      box-shadow: 0 10px 25px -5px rgba(225, 29, 72, 0.4);
      transition: all var(--transition-fast);
      border: 1px solid transparent;
      cursor: pointer;
      white-space: nowrap;
    }

    .btn-cta:hover {
      transform: translateY(-2px);
      background: #be123c;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--color-text-main);
      font-size: 1.5rem;
      cursor: pointer;
    }

    @media (max-width: 40rem) {
      .header-demo-btn { display: none; }
    }

    @media (max-width: 64rem) {
      .nav-menu {
        display: none;
      }
      .nav-menu ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        width: 100%;
      }
      .nav-menu li {
        width: 100%;
      }
      .nav-link {
        display: inline-block;   /* el subrayado mide lo que el texto, no toda la fila */
        padding: 0.5rem 0;
        font-size: 1.05rem;
      }
      .nav-link::after {
        bottom: 0.2rem;          /* dentro del padding, para que no se corte */
      }
      .menu-toggle { display: inline-flex; }
    }