feat(web): tane.comunes.org landing + localized app screenshots

- Hugo site (site/): EN/ES intro + legal (generated from docs/legal), an
  ES/EN About page from docs/{que-es-tane,what-is-tane}.md, seed-green theme,
  responsive header, store-badge placeholders, multi-stage Hugo->nginx image.
- Golden screenshot harness (test/screenshots/): en,es,fr,de,pt,ja + RTL demo,
  real fonts via DejaVu Sans + FontManifest; skip-by-default tag so CI stays
  green. collect_screenshots.sh feeds site/ and fastlane phoneScreenshots.
- Drop editorial notes from the public explainer.

site/assets/css/main.css

@@ -0,0 +1,198 @@
+:root {
+  --green: #2f7d34;
+  --green-dark: #22521e;
+  --appbar: #3a8434;
+  --canvas: #e7f1e0;
+  --container: #d3e8c8;
+  --on-container: #2f6d2a;
+  --title: #1b2416;
+  --muted: #5c6b52;
+  --field: #f3f7ee;
+  --outline: #c3cbb6;
+  --white: #fff;
+  --maxw: 1060px;
+  --radius: 18px;
+  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
+}
+
+* { box-sizing: border-box; }
+html { scroll-behavior: smooth; }
+body {
+  margin: 0;
+  color: var(--title);
+  background: var(--canvas);
+  line-height: 1.55;
+  -webkit-font-smoothing: antialiased;
+}
+img { max-width: 100%; display: block; }
+a { color: var(--green); }
+
+.skip-link {
+  position: absolute;
+  inset-inline-start: -999px;
+  background: var(--green);
+  color: #fff;
+  padding: .6rem 1rem;
+  border-radius: 0 0 8px 0;
+  z-index: 10;
+}
+.skip-link:focus { inset-inline-start: 0; }
+
+/* Header */
+.site-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  flex-wrap: wrap;
+  gap: .4rem 1.2rem;
+  padding: .7rem clamp(1rem, 4vw, 2rem);
+  background: var(--appbar);
+  color: #fff;
+  position: sticky;
+  top: 0;
+  z-index: 5;
+}
+.brand {
+  display: inline-flex;
+  align-items: center;
+  gap: .55rem;
+  color: #fff;
+  text-decoration: none;
+  font-weight: 700;
+  font-size: 1.25rem;
+  flex-shrink: 0;
+}
+.brand img { border-radius: 8px; }
+.site-nav {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: .5rem 1.1rem;
+}
+.site-nav a { color: #fff; text-decoration: none; opacity: .95; white-space: nowrap; }
+.site-nav a:hover { text-decoration: underline; }
+.lang-switch { display: inline-flex; gap: .6rem; font-size: .92rem; white-space: nowrap; }
+.lang-switch .current { opacity: .7; }
+.lang-switch a.lang { color: #fff; }
+
+/* Narrow phones: brand on its own row, nav wraps beneath it, left-aligned. */
+@media (max-width: 560px) {
+  .site-header { gap: .5rem; }
+  .brand { font-size: 1.15rem; }
+  .site-nav { width: 100%; gap: .4rem 1rem; font-size: .95rem; }
+}
+
+main { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2rem); }
+
+/* Hero */
+.hero {
+  display: grid;
+  grid-template-columns: 1.1fr .9fr;
+  gap: clamp(1.5rem, 4vw, 3rem);
+  align-items: center;
+  padding: clamp(2rem, 6vw, 4rem) 0 2rem;
+}
+.hero h1 {
+  font-size: clamp(2rem, 5vw, 3.1rem);
+  line-height: 1.1;
+  margin: 0 0 .6rem;
+  color: var(--green-dark);
+}
+.hero .tagline { font-size: 1.25rem; font-weight: 600; color: var(--on-container); margin: 0 0 1rem; }
+.hero .lead { font-size: 1.05rem; margin: 0 0 1rem; }
+.hero-shot { display: flex; justify-content: center; }
+
+/* Phone frame */
+.phone {
+  background: #12261a;
+  padding: 8px;
+  border-radius: 28px;
+  box-shadow: 0 18px 40px rgba(20, 50, 25, .22);
+  width: 232px;
+  max-width: 62vw;
+}
+.phone img { border-radius: 20px; }
+
+/* Sections */
+section { margin: 2.5rem 0; }
+h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); color: var(--green-dark); }
+
+.pillars {
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  gap: 1.2rem;
+}
+.pillar {
+  background: var(--white);
+  border: 1px solid var(--outline);
+  border-radius: var(--radius);
+  padding: 1.4rem;
+}
+.pillar-icon { font-size: 1.8rem; }
+.pillar h2 { font-size: 1.2rem; margin: .5rem 0; }
+.pillar p { margin: 0; color: #2c3826; }
+
+.shots .shot-row {
+  display: flex;
+  gap: 1.2rem;
+  justify-content: center;
+  flex-wrap: wrap;
+}
+.shots h2 { text-align: center; }
+
+.values {
+  background: var(--container);
+  border-radius: var(--radius);
+  padding: 1.6rem clamp(1.2rem, 4vw, 2.2rem);
+}
+.values ul { margin: .5rem 0 0; padding-inline-start: 1.2rem; }
+.values li { margin: .45rem 0; }
+
+.get-it { text-align: center; }
+.store-badges { margin-top: 1.2rem; }
+.coming-soon { color: var(--muted); font-style: italic; }
+.badge {
+  display: inline-block;
+  background: var(--green);
+  color: #fff;
+  text-decoration: none;
+  padding: .7rem 1.4rem;
+  border-radius: 999px;
+  margin: .3rem;
+  font-weight: 600;
+}
+
+/* Legal docs */
+.doc { padding: 2rem 0 3rem; max-width: 760px; }
+.doc h1 { color: var(--green-dark); }
+.doc-body h2 { font-size: 1.3rem; margin-top: 1.8rem; }
+.doc-body { font-size: 1.02rem; }
+.crumb { color: var(--muted); }
+.legal-index { list-style: none; padding: 0; }
+.legal-index li {
+  padding: 1rem 1.2rem;
+  background: var(--white);
+  border: 1px solid var(--outline);
+  border-radius: 12px;
+  margin: .7rem 0;
+}
+.legal-index a { font-weight: 600; font-size: 1.1rem; text-decoration: none; }
+.legal-index .desc { display: block; color: var(--muted); font-size: .95rem; margin-top: .2rem; }
+
+/* Footer */
+.site-footer {
+  background: var(--green-dark);
+  color: #dfeeda;
+  margin-top: 3rem;
+}
+.foot-inner { max-width: var(--maxw); margin: 0 auto; padding: 2rem clamp(1rem, 4vw, 2rem); }
+.foot-legal { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 1rem; }
+.foot-legal a { color: #fff; }
+.foot-note { margin: .3rem 0; font-size: .92rem; }
+.site-footer a { color: #cfe7c3; }
+
+@media (max-width: 820px) {
+  .hero { grid-template-columns: 1fr; }
+  .hero-shot { order: -1; }
+  .pillars { grid-template-columns: 1fr; }
+}