Exact asger toggle (theme key + prefers-color-scheme), responsive container + full site-chrome components

- weirsoe-theme.js: match asger.weirsoe.dk exactly — localStorage['theme'],
  prefers-color-scheme default, light<->dark click delegation.
- Container tokens + .wt-container(/--wide/--narrow/--bleed); Bulma adapter
  constrains content to a centred column past tablet (full-bleed on phones).
- Site chrome extracted from agw/pw so it can drop its hardcoded CSS: .wt-header
  /.wt-nav/.wt-brand/.wt-nav-link/.wt-main/.wt-footer, postcard .wt-card(+date/
  title/desc, --raised) and .wt-chip. README components table + theme-color note.

weirsoe-theme.css

@@ -29,6 +29,12 @@
   --wt-radius-sm: 0.55rem;
   --wt-shadow: 0 10px 30px #00000059;
   --wt-shadow-hover: 0 18px 44px #0000006e;
+  /* responsive content widths — full-bleed on small screens, a readable,
+     centred column on large ones (the asger.weirsøe.dk behaviour). */
+  --wt-container: 48rem;
+  --wt-container-wide: 72rem;
+  --wt-container-narrow: 34rem;
+  --wt-gutter: 1.25rem;
   --wt-font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
     Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
   --wt-font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
@@ -86,19 +92,80 @@ body::before {
     radial-gradient(50rem 30rem at 10% 0%, color-mix(in srgb, var(--color-accent-2) 10%, transparent), transparent 70%);
 }
 
+/* ---------- responsive container ---------- */
+/* Full width (with gutters) on small screens; a centred max-width column on
+   larger ones. Use --wt-container / --modifier to control the breakpoint width. */
+.wt-container {
+  width: 100%;
+  max-width: var(--wt-container);
+  margin-inline: auto;
+  padding-inline: var(--wt-gutter);
+}
+.wt-container--wide { max-width: var(--wt-container-wide); }
+.wt-container--narrow { max-width: var(--wt-container-narrow); }
+.wt-container--bleed { max-width: none; }
+
+/* ---------- site chrome (header / nav / footer) ---------- */
+.wt-header {
+  position: sticky; top: 0; z-index: 50;
+  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
+  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
+  background: color-mix(in srgb, var(--color-bg) 70%, transparent);
+}
+.wt-nav {
+  margin-inline: auto; max-width: var(--wt-container);
+  display: flex; align-items: center; justify-content: space-between;
+  padding: 0.875rem 1.25rem; gap: 1rem;
+}
+.wt-brand { font-weight: 700; letter-spacing: -0.02em; font-size: 1.125rem; color: var(--color-text); text-decoration: none; }
+.wt-brand-dot { color: var(--color-accent); }
+.wt-nav-links { display: flex; align-items: center; gap: 0.25rem; font-size: 0.875rem; list-style: none; margin: 0; padding: 0; }
+.wt-nav-link {
+  display: inline-block; border-radius: 0.5rem; padding: 0.375rem 0.75rem;
+  color: var(--color-muted); text-decoration: none;
+  transition: color 0.2s, background-color 0.2s;
+}
+.wt-nav-link:hover { color: var(--color-text); }
+.wt-nav-link.is-active, .wt-nav-link[aria-current="page"] { color: var(--color-text); background: var(--color-surface-2); }
+
+.wt-main { margin-inline: auto; width: 100%; max-width: var(--wt-container); padding: 3rem 1.25rem; }
+
+.wt-footer { margin-top: 6rem; border-top: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent); }
+.wt-footer-inner {
+  margin-inline: auto; max-width: var(--wt-container);
+  display: flex; flex-direction: column; align-items: center; gap: 0.75rem;
+  padding: 2.5rem 1.25rem; font-size: 0.875rem; color: var(--color-muted);
+}
+.wt-footer a { color: inherit; text-decoration: none; transition: color 0.2s; }
+.wt-footer a:hover { color: var(--color-accent); }
+@media (min-width: 640px) { .wt-footer-inner { flex-direction: row; justify-content: space-between; } }
+
 /* ---------- components ---------- */
+/* Faithful to the asger.weirsøe.dk post card: translucent surface, hairline
+   border, accent-on-hover, no heavy shadow. Add .wt-card--raised for a shadow. */
 .wt-card {
-  background: var(--color-surface);
+  background: color-mix(in srgb, var(--color-surface) 60%, transparent);
   border: 1px solid var(--color-border);
-  border-radius: var(--wt-radius);
-  box-shadow: var(--wt-shadow);
+  border-radius: 1rem;
   padding: 1.25rem;
+  transition: border-color 0.2s, transform 0.16s, box-shadow 0.16s;
 }
-.wt-card--hover:hover {
-  transform: translateY(-2px);
-  border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-border));
-  box-shadow: var(--wt-shadow-hover);
+.wt-card--hover:hover { border-color: color-mix(in srgb, var(--color-accent) 50%, transparent); }
+.wt-card--raised { background: var(--color-surface); box-shadow: var(--wt-shadow); }
+.wt-card--raised.wt-card--hover:hover { transform: translateY(-2px); box-shadow: var(--wt-shadow-hover); }
+.wt-card-date { font-size: 0.75rem; color: var(--color-muted); }
+.wt-card-title { margin-top: 0.25rem; font-size: 1.125rem; font-weight: 600; letter-spacing: -0.01em; }
+.wt-card--link:hover .wt-card-title, a.wt-card--hover:hover .wt-card-title { color: var(--color-accent); }
+.wt-card-desc { margin-top: 0.5rem; font-size: 0.875rem; color: var(--color-muted); }
+
+/* Pill chip / tag-link (e.g. blog tags) */
+.wt-chip {
+  display: inline-flex; align-items: center; border-radius: 999px;
+  border: 1px solid var(--color-border); padding: 0.1rem 0.6rem;
+  font-size: 0.75rem; color: var(--color-muted); text-decoration: none;
+  transition: color 0.2s, border-color 0.2s;
 }
+.wt-chip:hover { color: var(--color-accent); border-color: var(--color-accent); }
 .wt-btn {
   display: inline-flex; align-items: center; gap: 0.5rem;
   border-radius: var(--wt-radius-sm);