piha.lc / beta.piha.li + company_site marketing landing (#4)

## Summary

- Public short domain is **`piha.lc`** (prod) and **`beta.piha.li`** (beta)
- `/` is a marketing page in [aimloperations.com](https://aimloperations.com) / `company_site` styling (Inter, dark, cyan)
- CTA: want access → [contact](https://aimloperations.com/contact)
- Nav/logo/footer match the company site; debug mint form uses the same chrome

Closes #3.

## Secrets (control node)

Update hostnames only — no new token/pepper unless you are rotating:

**`url_shortening_service_prod.env`**
```text
DJANGO_ALLOWED_HOSTS=piha.lc,shortener.aimloperations.com,url-shortener,web
SHORT_DOMAIN=piha.lc
PUBLIC_SHORT_URL=https://piha.lc
SHORT_PUBLIC_HOSTS=piha.lc
CONTACT_URL=https://aimloperations.com/contact
```

**`url_shortening_service_beta.env`**
```text
DJANGO_ALLOWED_HOSTS=beta.piha.li,shortener-beta.aimloperations.com,url-shortener,web
SHORT_DOMAIN=beta.piha.li
PUBLIC_SHORT_URL=https://beta.piha.li
SHORT_PUBLIC_HOSTS=beta.piha.li
CONTACT_URL=https://aimloperations.com/contact
```

NPM: `piha.lc` / `beta.piha.li` → this container. Still do not proxy `/api/` on the short host.

## Test plan
- [ ] `cd site && uv run python manage.py test`
- [ ] `GET /` looks like aimloperations.com; Request access / Contact go to aimloperations.com/contact
- [ ] `GET /<code>` still 302
- [ ] `/api/` on Host `piha.lc` is 404

Reviewed-on: #4

site/links/templates/links/debug_create.html

@@ -1,35 +1,43 @@
 {% extends "core/base.html" %}
 {% block title %}Create short link · debug{% endblock %}
 {% block content %}
-  <p class="eyebrow">Debug only</p>
-  <h1>Create a short link</h1>
-  <p class="lede">Uses the same allowlist as the API. Not served when <code>DEBUG</code> is false.</p>
+<div class="section debug-section">
+  <div class="container" style="max-width: 40rem;">
+    <h1 class="hero-title" style="font-size: 2.2rem;">Create a short link</h1>
+    <p class="hero-subtitle" style="margin: 1rem 0 2rem; text-align: left;">
+      DEBUG only. Same allowlist as the API. Not served when <code>DEBUG</code> is false.
+    </p>
 
-  {% if messages %}
-  <ul class="messages">
-    {% for message in messages %}<li>{{ message }}</li>{% endfor %}
-  </ul>
-  {% endif %}
+    {% if messages %}
+    <ul class="messages" style="list-style: none; padding: 0; margin: 0 0 1rem; color: var(--primary-color);">
+      {% for message in messages %}<li>{{ message }}</li>{% endfor %}
+    </ul>
+    {% endif %}
 
-  {% if created_link %}
-  <div class="result">
-    <p>Short URL</p>
-    <p><code>{{ created_link.public_short_url }}</code></p>
-    <p>Target: {{ created_link.target_url }}</p>
-    <a class="btn" href="{{ created_link.public_short_url }}">Open</a>
+    {% if created_link %}
+    <div class="card debug-result">
+      <p class="card-title">Short URL</p>
+      <p><code>{{ created_link.public_short_url }}</code></p>
+      <p class="card-text">Target: {{ created_link.target_url }}</p>
+      <a class="btn" href="{{ created_link.public_short_url }}" style="margin-top: 1rem; padding: 0.7rem 1.4rem;">Open</a>
+    </div>
+    {% endif %}
+
+    <form method="post" action="{% url 'debug-create' %}">
+      {% csrf_token %}
+      {{ form.non_field_errors }}
+      {% for field in form %}
+      <label>
+        {{ field.label }}
+        <input class="form-control" type="{{ field.field.widget.input_type|default:'text' }}"
+          name="{{ field.name }}" value="{{ field.value|default_if_none:'' }}"
+          {% if field.field.widget.attrs.placeholder %}placeholder="{{ field.field.widget.attrs.placeholder }}"{% endif %}
+          {% if field.field.widget.attrs.autofocus %}autofocus{% endif %}>
+        {% if field.errors %}<span class="alert-text" style="color: #ff6b6b;">{{ field.errors|striptags }}</span>{% endif %}
+      </label>
+      {% endfor %}
+      <button type="submit" class="btn">Mint</button>
+    </form>
   </div>
-  {% endif %}
-
-  <form method="post" action="{% url 'debug-create' %}">
-    {% csrf_token %}
-    {{ form.non_field_errors }}
-    {% for field in form %}
-    <label>
-      {{ field.label }}
-      {{ field }}
-      {% if field.errors %}<span class="error">{{ field.errors|striptags }}</span>{% endif %}
-    </label>
-    {% endfor %}
-    <button type="submit">Mint</button>
-  </form>
+</div>
 {% endblock %}