feat(site): per-gym SEO texts, event gym selector, hero/navbar polish

- Generated SEO titles/descriptions per gym; gym seo fields override each on its own
- Keywords, author, og:site_name, favicon and JSON-LD logo follow the gym
- CrossFit page 404s before output for gyms without a box
- Events: «Mostrar em» gym selector; event page uses its gym's brand
- Hero event button text colour from the event colour (--ev-on)
- Navbar bottom line stops at the other-gym head (--switch-w)
- Diagonal hero blur mask; remove the trial link

CLAUDE.md

@@ -81,6 +81,10 @@ backoffice has an "a editar" gym switcher (`admin_gym_id()` /
 `admin_gym()` in `config/functions_gyms.php`). `/` and `/home` 301 to the default gym (`is_default`); the other published gyms appear as highlighted buttons (`.gym-switch-btn`) at the right end of the public navbar (`site/includes/navbar.php`). `site/gym_chooser.php` is no longer used.
 Each gym has a brand colour (`gyms.brand_color`, `#RRGGBB`, migration `migration_20261013_gym_brand_color.sql`; gym 1 = green `#C2D500`, gym 2 = red): set in Gestão → Ginásios, emitted as `:root` overrides by `gym_brand_css()` in `site/includes/include.php`. New components must use `--fitme-accent*` / `--fitme-on-accent`, never a hard-coded colour; the CrossFit nav pill follows the brand colour too. The public navbar's bottom edge is an always-on, slow (14s) sweep in the brand colour (`.header-section::before/::after`, `nav-sweep`, static with reduced motion). On the home page and the CrossFit page (`$nav_center_logo` set in `site/index.php` / `site/crossfit.php`, shared by `_open.php`; the CrossFit video header no longer prints its own logo, only a `visually-hidden` h1) the header starts taller (desktop >= 992px) with a second, big copy of the logo centred (fixed 52px height, so tall logos like the CrossFit one clear the links) (`.navbar-brand-hero`, `aria-hidden`); once `scrollY >= 40` (script in `navbar.php` toggles `.is-top`) the bar shrinks, the big logo fades out and the 150px left logo fades in (opacity crossfade, no movement). The hero gets `padding-top: 120px` on desktop so its event card clears the tall bar. On desktop the brand is absolute at the left and the links are centred on the full bar width; nav padding and logo width live in CSS, not inline. The other-gym buttons (`.gym-switch`) sit in the **match head**, a glimpse into the other site: painted in the first other gym's brand (`navbar.php` puts `gym_brand_vars()` of `$other_gyms[0]` on `.gym-switch`), a 5px strip in its accent on the slash, the face a shade darker (`--fitme-accent-dark` to 82% of it mixed with black) with a shadow inside the cut so the strip reads, and its logo in that gym's on-accent ink (`brightness(0)`, plus `invert(1)` with `.gym-switch--light-ink` when the on-accent is white). Paint is shared; geometry per breakpoint: desktop = absolute block at the right end of the bar (full height, width follows its buttons), left side cut on the brand slash (22px); below 992px = a full-width band across the bottom of the open menu, top edge slashed (18px). 992-1199px: links shrink (`.8125rem`, `--bs-navbar-nav-link-padding-x: .35rem`) so the 3070 menu clears the logo and head. Menu links are `.875rem` bold. Below 992px the open menu fills the screen under the bar (absolute, `100dvh - var(--nav-h)`, `--nav-h` = the header's real height, set by the `navbar.php` script, links/buttons centred, opacity fade; not `position:fixed` because the header's backdrop-filter is its containing block). The bar is liquid glass in Chromium: `backdrop-filter: url(#nav-glass) blur(6px) saturate(180%)` (`#nav-glass` in `include.php`: blurred low-frequency `feTurbulence` -> `feDisplacementMap`, bends the page behind it), gated by `@supports (-webkit-app-region: drag)` (Chromium-only property); Safari/Firefox keep the plain blur. **Brand slash template:** the cut corners of the "in" box are one rule in `style.css` ("Brand slash (template)"): `class="fx-slash"` (both ends) or `fx-slash-start` (left only), size via `--slash` (default 4px); pseudo-elements are added to that rule's selector list. Used by the nav and section-title underlines and the CrossFit pill (`--slash: 8px`, no radius); never paste the polygon again. The hero text has no glow, only a tight `0 1px 2px` shadow (h1, `.hero-brand`, `.hero-tagline`) and the hero frosted-band blur (`.hero-section .container::before`) is at opacity .8. The hero subtitle (`.hero-text h1 span`, gym `hero_subtitle`) is a block strapline at `.42em` of the h1, weight 600, tracked out. The hero event card's border is solid `--ev-accent`, the same colour as its button (button text stays `--fitme-on-accent`). Logos (`.navbar-brand img`, `.gym-switch-logo`) get the same `#pt-noise` grain filter as h1/h2, and `.hero-event-go`, `.cta-btn`, `.btn-primary` joined the `--noise` button list. Section-title underlines (`.section-title.deco h2:after`) use the same slashed 4px bar as the nav underline. The hero event button text uses `--fitme-on-accent` (white on red). The nav underline (`.nav-link:after`) is a 4px bar 3px under the text with slashed ends (`clip-path`, like the "in" box of the FitMe in logo). The hero event card (`.hero-event`) is square (no radius on card, badge or button), taller (88px min) and has a defocus gradient: `::after` is a `backdrop-filter: blur()` layer masked left->right, sharp on the left and most blurred on the right; the card itself must not get filter/backdrop-filter/opacity/mask or the blur stops reaching the hero photo. Each gym can have a `logo` (same migration, plus `migration_20261026_gym_logo.sql`: the column was added to the 2026-10-13 file after it had already run on dev, so dev had no `logo` column until 2026-10-26 — never edit a migration that has run, add a new one); the header image and the logo are uploaded in Gestão → Ginásios (`gyms_save_image()` → `uploads/gyms/`, valLine truncated
 An unpublished gym 404s publicly but previews for staff.
+- **SEO per gym (2026-10-26):** `site/includes/include.php` builds title/description per page from the gym (`$gym_name`, `$loc_in` = «na Zona …»/«em Mira»); gym 1 keeps hand-written texts, other gyms get generated ones (never the 3070 texts). The gym's own `seo_title` / `seo_description` (Gestão → Ginásios) override the homepage each on its own. Keywords, author, og:site_name, favicon (gym logo if SVG) and the JSON-LD logo (`seo.php`) follow the gym. FitMe in's SEO texts were set in the dev DB only; production needs them entered in Gestão → Ginásios.
+- `site/crossfit.php` decides the 404 for gyms without `has_crossfit` before `_open.php`, so it is a real 404 status.
+- **Events per gym:** Eventos form «Mostrar em» writes `events.gym_id` (NULL = all gyms; `site_active_events()` filters on it). `site/evento.php` renders the event in its gym's brand/name/info. The hero event button text uses `--ev-on` (white/black computed from the event colour), not the page gym's on-accent.
+- Navbar: the desktop bottom sweep line stops before the other-gym head via `--switch-w` (set by `setNavH` in `navbar.php`). The hero blur (`.hero-section .container::before`) has a second diagonal mask, so it is weaker at the top left. The «Marca uma aula experimental» link was removed; `#trialModal` stays (only reopened by `?agendar=erro`).
 
 ## Imagens / JPEG XL (2026-10-26)
 Fleet transition to JPEG XL (root `Y:\GitTea\CLAUDE.md`, "Images"); fitme3070 is the reference site. Uploads already accept `.jxl` (gyms header/logo, gallery photos).