Fix the meta tags and SEO issues for: https://facialharmonyai.com
Current OG score: 83/100

## Issues found

- [WARNING] La descripción es demasiado larga (225 caracteres)
  Las descripciones de más de 200 caracteres se truncarán mucho en la mayoría de plataformas. Recomendado: 110-160 caracteres.

- [TIP] La imagen es 1280x720px
  El tamaño recomendado es 1200x630px para un buen resultado en todas las plataformas.

- [TIP] Falta twitter:site
  Añadir tu @usuario de X/Twitter atribuye el contenido a tu cuenta y mejora la visibilidad de marca.
  Suggested fix:
  <meta name="twitter:site" content="@yourusername" />

- [TIP] La meta description es larga (225 caracteres)
  Google suele mostrar 150-160 caracteres en resultados. El resto se cortará.

- [TIP] Falta la meta theme-color
  theme-color personaliza el color de la barra del navegador en móvil y mejora la experiencia de marca.
  Suggested fix:
  <meta name="theme-color" content="#4285f4" />

- [TIP] No se encontró favicon SVG
  Los favicons SVG escalan a cualquier tamaño y admiten dark mode con media queries. Los navegadores modernos los soportan de forma nativa.
  Suggested fix:
  <link rel="icon" type="image/svg+xml" href="/favicon.svg" />

- [TIP] Falta el web app manifest
  Un web app manifest (manifest.json) habilita "Añadir a pantalla de inicio" en Android y define nombre, iconos y tema. Esencial para PWA.
  Suggested fix:
  <link rel="manifest" href="/site.webmanifest" />

- [TIP] El tamaño del HTML es moderado (196 KB)
  El documento HTML pesa 196 KB. No es crítico, pero mantenerlo bajo 100 KB mejora la carga inicial.

## Current meta tags

```html
<title>AI Facial Harmony Analysis From One Photo</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="description" content="A private facial proportion study from one clear photo. See symmetry, thirds, and golden-ratio cues—then unlock a deeper atelier report if you want more. Analysis runs in your browser. Your photo is not uploaded to the cloud." />
<link rel="canonical" href="https://facialharmonyai.com/" />
<meta name="robots" content="index, follow" />
<!-- html lang="en" -->
<meta property="og:type" content="website" />
<meta property="og:title" content="AI Facial Harmony Analysis From One Photo" />
<meta property="og:description" content="A private facial proportion study from one clear photo. See symmetry, thirds, and golden-ratio cues—then unlock a deeper atelier report if you want more. Analysis runs in your browser. Your photo is not uploaded to the cloud." />
<meta property="og:url" content="https://facialharmonyai.com/" />
<meta property="og:site_name" content="FacialHarmonyAI" />
<meta property="og:locale" content="en" />
<meta property="og:image" content="https://facialharmonyai.com/images/section-how-it-works.jpg" />
<meta property="og:image:width" content="1280" />
<meta property="og:image:height" content="720" />
<meta property="og:image:alt" content="FacialHarmonyAI facial harmony analysis" />
<meta property="og:title" content="AI Facial Harmony Analysis From One Photo" />
<meta property="og:description" content="A private facial proportion study from one clear photo. See symmetry, thirds, and golden-ratio cues—then unlock a deeper atelier report if you want more. Analysis runs in your browser. Your photo is not uploaded to the cloud." />
<meta property="og:site_name" content="FacialHarmonyAI" />
<meta property="og:image" content="https://facialharmonyai.com/images/section-how-it-works.jpg" />
<meta property="og:image:width" content="1280" />
<meta property="og:image:height" content="720" />
<meta property="og:image:alt" content="FacialHarmonyAI facial analysis" />
<meta property="og:type" content="website" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="AI Facial Harmony Analysis From One Photo" />
<meta name="twitter:description" content="A private facial proportion study from one clear photo. See symmetry, thirds, and golden-ratio cues—then unlock a deeper atelier report if you want more. Analysis runs in your browser. Your photo is not uploaded to the cloud." />
<meta name="twitter:image" content="https://facialharmonyai.com/images/section-how-it-works.jpg" />
<meta name="twitter:image:alt" content="FacialHarmonyAI facial harmony analysis" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="AI Facial Harmony Analysis From One Photo" />
<meta name="twitter:description" content="A private facial proportion study from one clear photo. See symmetry, thirds, and golden-ratio cues—then unlock a deeper atelier report if you want more. Analysis runs in your browser. Your photo is not uploaded to the cloud." />
<meta name="twitter:image" content="https://facialharmonyai.com/images/section-how-it-works.jpg" />
```

## Performance
- Response time: 69ms
- HTML size: 196 KB

## Task

Provide the corrected and complete set of meta tags for the <head> of this page that fixes all the issues above. Include HTML, Open Graph, and Twitter Card tags. If there are performance issues, suggest specific improvements.