diff --git a/web/src/App.tsx b/web/src/App.tsx
new file mode 100644
index 0000000..a26ad2c
--- /dev/null
+++ b/web/src/App.tsx
@@ -0,0 +1,196 @@
+import { useEffect, useMemo, useState } from "react";
+import { AnimatePresence, LayoutGroup, motion } from "motion/react";
+import { useMonitor } from "./hooks/useMonitor";
+import { springs, UIProvider, useUI } from "./lib/ui";
+import type { CheckKind } from "./lib/types";
+import { fmtNumber } from "./lib/format";
+import { Header } from "./components/Header";
+import { Boot } from "./components/Boot";
+import { TargetCard } from "./components/TargetCard";
+import { TargetDetail } from "./components/TargetDetail";
+import { OrbitalOverview } from "./components/OrbitalOverview";
+import { RadialDay } from "./components/RadialDay";
+import { IncidentList } from "./components/IncidentList";
+import { PublicView } from "./components/PublicView";
+
+const MIN_BOOT_MS = 1700;
+
+type Filter = "all" | CheckKind;
+
+function FilterChips({
+  targets,
+  filter,
+  onChange,
+}: {
+  targets: { type: CheckKind }[];
+  filter: Filter;
+  onChange: (f: Filter) => void;
+}) {
+  const { t, lang, reduced } = useUI();
+  const kinds = useMemo(() => {
+    const present = new Set(targets.map((x) => x.type));
+    return (["http", "tls", "tcp", "icmp", "docker"] as CheckKind[]).filter((k) =>
+      present.has(k),
+    );
+  }, [targets]);
+
+  if (kinds.length < 2) return null;
+
+  const chip = (value: Filter, label: string, count: number) => {
+    const active = filter === value;
+    return (
+      <button
+        key={value}
+        onClick={() => onChange(value)}
+        aria-pressed={active}
+        className={`relative px-2.5 py-[3px] rounded-full font-mono text-[9.5px] tracking-[0.12em] uppercase cursor-pointer transition-colors ${
+          active ? "text-ink-950" : "text-paper-faint hover:text-paper-dim"
+        }`}
+      >
+        {active && (
+          <motion.span
+            layoutId="filter-chip"
+            className="absolute inset-0 rounded-full bg-brass"
+            transition={reduced ? { duration: 0 } : springs.snappy}
+          />
+        )}
+        <span className="relative z-10">
+          {label} <span className="opacity-65 tabular">{fmtNumber(lang, count)}</span>
+        </span>
+      </button>
+    );
+  };
+
+  return (
+    <div className="flex items-center gap-1 flex-wrap">
+      {chip("all", t.all, targets.length)}
+      {kinds.map((k) =>
+        chip(k, k, targets.filter((x) => x.type === k).length),
+      )}
+    </div>
+  );
+}
+
+function Shell() {
+  const monitor = useMonitor();
+  const { t, mode, reduced } = useUI();
+  const [selected, setSelected] = useState<string | null>(
+    () => decodeURIComponent(location.hash.slice(1)) || null,
+  );
+  const [filter, setFilter] = useState<Filter>("all");
+  const [bootElapsed, setBootElapsed] = useState(reduced);
+
+  useEffect(() => {
+    const id = setTimeout(() => setBootElapsed(true), reduced ? 0 : MIN_BOOT_MS);
+    return () => clearTimeout(id);
+  }, [reduced]);
+
+  const booted = monitor.ready && bootElapsed;
+  const selectedTarget = monitor.targets.find((x) => x.id === selected) ?? null;
+
+  // The selected target lives in the URL — deep-linkable, back-button friendly.
+  const select = (id: string | null) => {
+    setSelected(id);
+    history.replaceState(null, "", id ? `#${encodeURIComponent(id)}` : location.pathname);
+  };
+
+  useEffect(() => {
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === "Escape") select(null);
+    };
+    window.addEventListener("keydown", onKey);
+    return () => window.removeEventListener("keydown", onKey);
+  }, []);
+
+  const visibleTargets =
+    filter === "all"
+      ? monitor.targets
+      : monitor.targets.filter((x) => x.type === filter);
+
+  return (
+    <div className="relative z-[1] min-h-screen">
+      <AnimatePresence>{!booted && <Boot />}</AnimatePresence>
+
+      {booted && (
+        <>
+          <Header connected={monitor.connected} targets={monitor.targets} />
+          <div className="rule-fade mx-6 sm:mx-10" />
+
+          {mode === "public" ? (
+            <PublicView monitor={monitor} />
+          ) : (
+            <LayoutGroup>
+              <main className="px-6 sm:px-10 pb-16">
+                {/* hero: orbit + day dial */}
+                <section className="grid gap-10 lg:grid-cols-[minmax(0,1.35fr)_minmax(0,1fr)] items-start pt-8">
+                  <OrbitalOverview
+                    targets={monitor.targets}
+                    onSelect={select}
+                  />
+                  <div className="flex flex-col gap-8">
+                    <RadialDay
+                      targets={monitor.targets}
+                      dayBuckets={monitor.dayBuckets}
+                    />
+                    <IncidentList
+                      incidents={monitor.incidents.slice(0, 6)}
+                      targets={monitor.targets}
+                      onSelect={select}
+                      compact
+                    />
+                  </div>
+                </section>
+
+                {/* targets grid */}
+                <section className="mt-12">
+                  <div className="flex items-baseline gap-4 mb-5 flex-wrap">
+                    <h2 className="microlabel">{t.targets}</h2>
+                    <div className="rule-fade flex-1 min-w-16" />
+                    <FilterChips
+                      targets={monitor.targets}
+                      filter={filter}
+                      onChange={setFilter}
+                    />
+                  </div>
+                  <div className="grid gap-4 [grid-template-columns:repeat(auto-fill,minmax(215px,1fr))]">
+                    <AnimatePresence mode="popLayout" initial={false}>
+                      {visibleTargets.map((target, i) => (
+                        <TargetCard
+                          key={target.id}
+                          target={target}
+                          index={i}
+                          onSelect={select}
+                        />
+                      ))}
+                    </AnimatePresence>
+                  </div>
+                </section>
+              </main>
+
+              <AnimatePresence>
+                {selectedTarget && (
+                  <TargetDetail
+                    target={selectedTarget}
+                    buckets={monitor.dayBuckets[selectedTarget.id] ?? []}
+                    incidents={monitor.incidents.filter(
+                      (i) => i.target_id === selectedTarget.id,
+                    )}
+                    onClose={() => select(null)}
+                  />
+                )}
+              </AnimatePresence>
+            </LayoutGroup>
+          )}
+        </>
+      )}
+    </div>
+  );
+}
+
+export default function App() {
+  return (
+    <UIProvider>
+      <Shell />
+    </UIProvider>
+  );
+}