diff --git a/app/src/app/_layout.tsx b/app/src/app/_layout.tsx
index 3efb680..e1b51dc 100644
--- a/app/src/app/_layout.tsx
+++ b/app/src/app/_layout.tsx
@@ -2,10 +2,11 @@ import NetInfo from "@react-native-community/netinfo";
 import { Link, Stack } from "expo-router";
 import { StatusBar } from "expo-status-bar";
 import { useEffect } from "react";
-import { AppState } from "react-native";
+import { AppState, Pressable } from "react-native";
 import { GestureHandlerRootView } from "react-native-gesture-handler";
 import { getState, hydrate, subscribe, sync } from "../lib/store";
-import { C } from "../lib/theme";
+import Icon from "../components/Icon";
+import { C, space } from "../lib/theme";
 import { refreshNextUpWidget } from "../widget/refresh";
 
 export default function RootLayout() {
@@ -35,12 +36,16 @@ export default function RootLayout() {
 
   return (
     <GestureHandlerRootView style={{ flex: 1 }}>
-      <StatusBar style="light" />
+      <StatusBar style="dark" />
       <Stack
         screenOptions={{
           headerStyle: { backgroundColor: C.bg },
           headerTintColor: C.text,
+          // No hairline under the bar: the header should melt into the grouped
+          // background so the in-content Title carries the hierarchy instead.
           headerShadowVisible: false,
+          headerTitleStyle: { fontSize: 17, fontWeight: "600", color: C.text, letterSpacing: -0.2 },
+          headerBackButtonDisplayMode: "minimal",
           contentStyle: { backgroundColor: C.bg },
         }}
       >
@@ -49,8 +54,13 @@ export default function RootLayout() {
           options={{
             title: "GTD",
             headerRight: () => (
-              <Link href="/settings" style={{ paddingHorizontal: 8, fontSize: 18 }}>
-                ⚙️
+              <Link href="/settings" asChild>
+                <Pressable
+                  hitSlop={12}
+                  style={({ pressed }) => [{ paddingHorizontal: space.sm }, pressed && { opacity: 0.5 }]}
+                >
+                  <Icon name="settings" size={22} color={C.textSecondary} />
+                </Pressable>
               </Link>
             ),
           }}
diff --git a/app/src/app/index.tsx b/app/src/app/index.tsx
index 6745f67..0a6d81a 100644
--- a/app/src/app/index.tsx
+++ b/app/src/app/index.tsx
@@ -1,20 +1,45 @@
 import { useFocusEffect, useRouter } from "expo-router";
-import { Pressable, StyleSheet, Text, View } from "react-native";
-import TaskRow from "../components/TaskRow";
+import { Pressable, ScrollView, StyleSheet, Text, View } from "react-native";
+import Icon, { type IconName } from "../components/Icon";
+import TaskRow, { TaskSeparator } from "../components/TaskRow";
+import { Card, Empty, Screen, SectionHeader, Title } from "../components/ui";
 import { haptic } from "../lib/haptics";
 import { daysSince, useLastReview } from "../lib/review";
 import { todayTasks, visibleTasksByStatus } from "../lib/store";
-import { C } from "../lib/theme";
+import { C, shadow, space, type } from "../lib/theme";
 import { useStore } from "../lib/useStore";
 
-const MENU = [
-  { icon: "📅", label: "Today", href: "/today" },
-  { icon: "▶️", label: "Next", href: "/list/next" },
-  { icon: "⏳", label: "Waiting", href: "/list/waiting" },
-  { icon: "💭", label: "Someday", href: "/list/someday" },
-  { icon: "📁", label: "Projects", href: "/projects" },
-  { icon: "🔄", label: "Review", href: "/review" },
-] as const;
+const MENU: { icon: IconName; label: string; href: string }[] = [
+  { icon: "today", label: "Today", href: "/today" },
+  { icon: "next", label: "Next", href: "/list/next" },
+  { icon: "waiting", label: "Waiting", href: "/list/waiting" },
+  { icon: "someday", label: "Someday", href: "/list/someday" },
+  { icon: "projects", label: "Projects", href: "/projects" },
+  { icon: "review", label: "Review", href: "/review" },
+];
+
+const PREVIEW = 3;
+
+/**
+ * One tappable line of status — overdue, review due, sync trouble. Rendered as
+ * a real row with a chevron rather than coloured micro-text, so it reads as
+ * something you can act on.
+ */
+function Alert({ tone, text, onPress }: { tone: string; text: string; onPress?: () => void }) {
+  const body = (
+    <View style={s.alert}>
+      <View style={[s.dot, { backgroundColor: tone }]} />
+      <Text style={[s.alertText, { color: tone }]}>{text}</Text>
+      {!!onPress && <Icon name="chevron" size={16} color={tone} />}
+    </View>
+  );
+  if (!onPress) return body;
+  return (
+    <Pressable onPress={onPress} style={({ pressed }) => pressed && { opacity: 0.6 }}>
+      {body}
+    </Pressable>
+  );
+}
 
 export default function Home() {
   const router = useRouter();
@@ -25,103 +50,146 @@ export default function Home() {
   useFocusEffect(reloadReview);
   const reviewDays = daysSince(lastReview);
   const reviewDue = lastReview === null || (reviewDays !== null && reviewDays >= 7);
+  const preview = next.slice(0, PREVIEW);
 
   return (
-    <View style={s.screen}>
-      <View style={{ flex: 1 }}>
-        <Text style={s.sectionTitle}>Next up</Text>
-        {next.slice(0, 3).map((t) => (
-          <TaskRow key={t.id} task={t} />
-        ))}
-        {next.length === 0 && <Text style={s.empty}>Nothing next. Tap ＋ to add.</Text>}
-        {next.length > 3 && (
-          <Pressable onPress={() => router.push("/list/next")}>
-            <Text style={s.viewAll}>all next actions ({next.length}) →</Text>
+    <Screen>
+      <ScrollView contentContainerStyle={s.content} showsVerticalScrollIndicator={false}>
+        <Title count={next.length}>Next up</Title>
+
+        {preview.length === 0 ? (
+          <Empty>Nothing queued. Add the next thing on your mind.</Empty>
+        ) : (
+          <Card>
+            {preview.map((t, i) => (
+              <View key={t.id}>
+                {i > 0 && <TaskSeparator />}
+                <TaskRow task={t} />
+              </View>
+            ))}
+          </Card>
+        )}
+
+        {next.length > PREVIEW && (
+          <Pressable
+            onPress={() => router.push("/list/next")}
+            style={({ pressed }) => [s.viewAll, pressed && { opacity: 0.6 }]}
+          >
+            <Text style={s.viewAllText}>All {next.length} next actions</Text>
+            <Icon name="chevron" size={16} color={C.accent} />
           </Pressable>
         )}
-        {overdue.length > 0 && (
-          <Pressable onPress={() => router.push("/today")}>
-            <Text style={s.overdue}>{overdue.length} overdue →</Text>
-          </Pressable>
+
+        {(overdue.length > 0 || reviewDue || store.offline || !!store.syncError) && (
+          <>
+            <SectionHeader>Needs attention</SectionHeader>
+            <Card>
+              {overdue.length > 0 && (
+                <Alert
+                  tone={C.danger}
+                  text={`${overdue.length} overdue`}
+                  onPress={() => router.push("/today")}
+                />
+              )}
+              {reviewDue && (
+                <Alert
+                  tone={C.warn}
+                  text={
+                    lastReview === null
+                      ? "No weekly review yet"
+                      : `Weekly review is ${reviewDays} days overdue`
+                  }
+                  onPress={() => router.push("/review")}
+                />
+              )}
+              {store.offline && (
+                <Alert
+                  tone={C.textSecondary}
+                  text={
+                    store.pending > 0
+                      ? `Offline — ${store.pending} change${store.pending === 1 ? "" : "s"} queued`
+                      : "Offline"
+                  }
+                />
+              )}
+              {!!store.syncError && <Alert tone={C.danger} text={store.syncError} />}
+            </Card>
+          </>
         )}
-        {reviewDue && (
-          <Pressable onPress={() => router.push("/review")}>
-            <Text style={s.reviewNudge}>
-              {lastReview === null ? "no review yet — start one →" : `review overdue (${reviewDays}d) →`}
-            </Text>
-          </Pressable>
-        )}
-        {store.offline && (
-          <Text style={s.offline}>
-            offline{store.pending > 0 ? ` — ${store.pending} change${store.pending === 1 ? "" : "s"} queued` : ""}
-          </Text>
-        )}
-        {store.syncError && <Text style={s.error}>{store.syncError}</Text>}
-      </View>
-      <View style={s.menu}>
+      </ScrollView>
+
+      <View style={s.tabBar}>
         {MENU.map((m) => (
-          <Pressable key={m.label} style={s.menuItem} onPress={() => router.push(m.href)}>
-            <Text style={s.menuIcon}>{m.icon}</Text>
-            <Text style={s.menuLabel}>{m.label}</Text>
+          <Pressable
+            key={m.label}
+            style={({ pressed }) => [s.tab, pressed && { opacity: 0.5 }]}
+            onPress={() => {
+              haptic.tap();
+              router.push(m.href);
+            }}
+          >
+            <Icon name={m.icon} size={21} color={C.textSecondary} bg={C.surface} />
+            <Text style={s.tabLabel}>{m.label}</Text>
           </Pressable>
         ))}
       </View>
+
       <Pressable
-        style={s.fab}
+        style={({ pressed }) => [s.fab, pressed && { transform: [{ scale: 0.94 }] }]}
         onPress={() => {
           haptic.tap();
           router.push("/add");
         }}
       >
-        <Text style={s.fabText}>＋</Text>
+        <Icon name="plus" size={26} color={C.onAccent} />
       </Pressable>
-    </View>
+    </Screen>
   );
 }
 
 const s = StyleSheet.create({
-  screen: { flex: 1, backgroundColor: C.bg },
-  sectionTitle: {
-    color: C.muted,
-    fontSize: 13,
-    textTransform: "uppercase",
-    letterSpacing: 1,
-    paddingHorizontal: 16,
-    paddingTop: 18,
-    paddingBottom: 6,
-  },
-  empty: { color: C.muted, textAlign: "center", marginTop: 48, fontSize: 15 },
-  viewAll: { color: C.muted, fontSize: 14, padding: 16 },
-  overdue: { color: C.danger, fontSize: 14, paddingHorizontal: 16, paddingBottom: 8 },
-  reviewNudge: { color: C.warn, fontSize: 14, paddingHorizontal: 16, paddingBottom: 8 },
-  error: { color: C.danger, paddingHorizontal: 16, paddingTop: 8 },
-  offline: { color: C.muted, fontSize: 13, paddingHorizontal: 16, paddingTop: 8 },
-  menu: {
+  content: { paddingHorizontal: space.lg, paddingBottom: 120 },
+
+  viewAll: {
     flexDirection: "row",
+    alignItems: "center",
+    gap: space.xs,
+    paddingVertical: space.md,
+    paddingHorizontal: space.xs,
+  },
+  viewAllText: { ...type.body, color: C.accent, fontWeight: "500" },
+
+  alert: {
+    flexDirection: "row",
+    alignItems: "center",
+    gap: space.md,
+    paddingVertical: space.md + 1,
+    paddingHorizontal: space.lg,
+  },
+  dot: { width: 7, height: 7, borderRadius: 999 },
+  alertText: { ...type.body, flex: 1, fontWeight: "500" },
+
+  tabBar: {
+    flexDirection: "row",
+    backgroundColor: C.surface,
     borderTopWidth: StyleSheet.hairlineWidth,
     borderTopColor: C.border,
-    paddingTop: 10,
-    paddingBottom: 18,
-    backgroundColor: C.bg,
+    paddingTop: space.md,
+    paddingBottom: space.xxl,
   },
-  menuItem: { flex: 1, alignItems: "center", gap: 3 },
-  menuIcon: { fontSize: 20 },
-  menuLabel: { color: C.muted, fontSize: 11 },
+  tab: { flex: 1, alignItems: "center", gap: 5 },
+  tabLabel: { fontSize: 11, color: C.textSecondary, letterSpacing: 0.1 },
+
   fab: {
     position: "absolute",
-    right: 20,
-    bottom: 92,
-    width: 58,
-    height: 58,
-    borderRadius: 29,
+    right: space.xl,
+    bottom: 104,
+    width: 56,
+    height: 56,
+    borderRadius: 28,
     backgroundColor: C.accent,
     alignItems: "center",
     justifyContent: "center",
-    elevation: 6,
-    shadowColor: "#000",
-    shadowOpacity: 0.35,
-    shadowRadius: 8,
-    shadowOffset: { width: 0, height: 4 },
+    ...shadow.fab,
   },
-  fabText: { color: "#FFFFFF", fontSize: 28, lineHeight: 32, fontWeight: "600" },
 });
diff --git a/app/src/components/DateField.tsx b/app/src/components/DateField.tsx
index c2ec88c..b1ba458 100644
--- a/app/src/components/DateField.tsx
+++ b/app/src/components/DateField.tsx
@@ -3,7 +3,8 @@
 import { useMemo, useState } from "react";
 import { Pressable, StyleSheet, Text, View } from "react-native";
 import { haptic } from "../lib/haptics";
-import { C } from "../lib/theme";
+import { C, radius, space, type } from "../lib/theme";
+import { SectionHeader } from "./ui";
 
 const DAY_MS = 86_400_000;
 const WEEKDAYS = ["M", "T", "W", "T", "F", "S", "S"];
@@ -97,8 +98,8 @@ function Calendar({ value, onPick }: { value: string | null; onPick: (v: string)
                 <Text
                   style={[
                     s.dayText,
-                    !inMonth && { color: C.border },
-                    selected && { color: "#FFFFFF", fontWeight: "700" },
+                    !inMonth && { color: C.muted, opacity: 0.45 },
+                    selected && { color: C.onAccent, fontWeight: "700" },
                     !selected && isToday && { color: C.accent },
                   ]}
                 >
@@ -133,9 +134,9 @@ export default function DateField({
   ];
 
   return (
-    <View style={{ marginBottom: 14 }}>
+    <View style={{ marginBottom: space.lg }}>
       <View style={s.labelRow}>
-        <Text style={s.label}>{label}</Text>
+        <SectionHeader>{label}</SectionHeader>
         {value != null && <Text style={s.chosen}>{pretty(value)}</Text>}
       </View>
       <View style={s.rowWrap}>
@@ -148,7 +149,7 @@ export default function DateField({
               onChange(value === q.v && clearable ? null : q.v);
             }}
           >
-            <Text style={[s.chipText, value === q.v && { color: C.text }]}>{q.label}</Text>
+            <Text style={[s.chipText, value === q.v && s.chipTextActive]}>{q.label}</Text>
           </Pressable>
         ))}
         <Pressable
@@ -158,7 +159,7 @@ export default function DateField({
             setOpen(!open);
           }}
         >
-          <Text style={[s.chipText, open && { color: C.text }]}>📆 Pick…</Text>
+          <Text style={[s.chipText, open && s.chipTextActive]}>Pick a date…</Text>
         </Pressable>
         {clearable && value != null && (
           <Pressable
@@ -186,34 +187,34 @@ export default function DateField({
 }
 
 const s = StyleSheet.create({
-  labelRow: { flexDirection: "row", justifyContent: "space-between", alignItems: "baseline", marginBottom: 6 },
-  label: { color: C.muted, fontSize: 13, textTransform: "uppercase", letterSpacing: 0.5 },
-  chosen: { color: C.accent, fontSize: 14, fontWeight: "600" },
-  rowWrap: { flexDirection: "row", flexWrap: "wrap", gap: 8 },
+  labelRow: { flexDirection: "row", justifyContent: "space-between", alignItems: "center" },
+  chosen: { ...type.chip, color: C.accent, fontWeight: "600" },
+  rowWrap: { flexDirection: "row", flexWrap: "wrap", gap: space.sm },
   chip: {
-    paddingVertical: 8,
-    paddingHorizontal: 14,
-    borderRadius: 20,
+    paddingVertical: 9,
+    paddingHorizontal: 15,
+    borderRadius: radius.pill,
     backgroundColor: C.surface,
     borderWidth: 1,
     borderColor: C.border,
   },
-  chipActive: { backgroundColor: C.surface2, borderColor: C.accent },
-  chipText: { color: C.muted, fontSize: 14 },
+  chipActive: { backgroundColor: C.accentSoft, borderColor: C.accent },
+  chipText: { ...type.chip, color: C.textSecondary },
+  chipTextActive: { color: C.accent, fontWeight: "600" },
   calendar: {
-    marginTop: 10,
+    marginTop: space.md,
     backgroundColor: C.surface,
-    borderRadius: 14,
+    borderRadius: radius.lg,
     borderWidth: 1,
     borderColor: C.border,
-    padding: 10,
+    padding: space.md,
   },
-  calHead: { flexDirection: "row", justifyContent: "space-between", alignItems: "center", marginBottom: 6 },
-  calTitle: { color: C.text, fontSize: 15, fontWeight: "600" },
+  calHead: { flexDirection: "row", justifyContent: "space-between", alignItems: "center", marginBottom: space.sm },
+  calTitle: { color: C.text, fontSize: 16, fontWeight: "600", letterSpacing: -0.2 },
   arrow: { paddingHorizontal: 14, paddingVertical: 4 },
-  arrowText: { color: C.accent, fontSize: 22, fontWeight: "600" },
+  arrowText: { color: C.accent, fontSize: 24, fontWeight: "500" },
   week: { flexDirection: "row" },
-  weekday: { flex: 1, textAlign: "center", color: C.muted, fontSize: 11, paddingVertical: 4 },
+  weekday: { flex: 1, textAlign: "center", color: C.muted, fontSize: 11, fontWeight: "600", letterSpacing: 0.4, paddingVertical: 6 },
   day: {
     flex: 1,
     aspectRatio: 1.15,
@@ -223,6 +224,6 @@ const s = StyleSheet.create({
     margin: 1,
   },
   daySelected: { backgroundColor: C.accent },
-  dayToday: { borderWidth: 1, borderColor: C.accent },
-  dayText: { color: C.text, fontSize: 14 },
+  dayToday: { backgroundColor: C.accentSoft },
+  dayText: { color: C.text, fontSize: 15 },
 });
diff --git a/app/src/components/EstimateChips.tsx b/app/src/components/EstimateChips.tsx
index 553f52d..bddeddb 100644
--- a/app/src/components/EstimateChips.tsx
+++ b/app/src/components/EstimateChips.tsx
@@ -4,7 +4,8 @@
 import { Pressable, StyleSheet, Text, View } from "react-native";
 import { haptic } from "../lib/haptics";
 import { formatEstimate } from "../lib/priority";
-import { C } from "../lib/theme";
+import { C, radius, space, type } from "../lib/theme";
+import { SectionHeader } from "./ui";
 
 const PRESETS = [15, 30, 45, 60, 90, 120];
 
@@ -17,21 +18,25 @@ export default function EstimateChips({
 }) {
   const options = value && !PRESETS.includes(value) ? [...PRESETS, value].sort((a, b) => a - b) : PRESETS;
   return (
-    <View style={{ marginBottom: 14 }}>
-      <Text style={s.label}>Estimated time</Text>
+    <View style={s.wrap}>
+      <SectionHeader>Estimated time</SectionHeader>
       <View style={s.rowWrap}>
         {options.map((m) => {
           const active = value === m;
           return (
             <Pressable
               key={m}
-              style={[s.chip, active && s.chipActive]}
+              style={({ pressed }) => [
+                s.chip,
+                active && s.chipActive,
+                pressed && !active && { backgroundColor: C.surface2 },
+              ]}
               onPress={() => {
                 haptic.select();
                 onChange(active ? null : m);
               }}
             >
-              <Text style={[s.chipText, active && { color: C.text }]}>{formatEstimate(m)}</Text>
+              <Text style={[s.chipText, active && s.chipTextActive]}>{formatEstimate(m)}</Text>
             </Pressable>
           );
         })}
@@ -41,16 +46,17 @@ export default function EstimateChips({
 }
 
 const s = StyleSheet.create({
-  label: { color: C.muted, fontSize: 13, marginBottom: 6, textTransform: "uppercase", letterSpacing: 0.5 },
-  rowWrap: { flexDirection: "row", flexWrap: "wrap", gap: 8 },
+  wrap: { marginBottom: space.lg },
+  rowWrap: { flexDirection: "row", flexWrap: "wrap", gap: space.sm },
   chip: {
-    paddingVertical: 8,
-    paddingHorizontal: 14,
-    borderRadius: 20,
+    paddingVertical: 9,
+    paddingHorizontal: 15,
+    borderRadius: radius.pill,
     backgroundColor: C.surface,
     borderWidth: 1,
     borderColor: C.border,
   },
-  chipActive: { backgroundColor: C.surface2, borderColor: C.accent },
-  chipText: { color: C.muted, fontSize: 14 },
+  chipActive: { backgroundColor: C.accentSoft, borderColor: C.accent },
+  chipText: { ...type.chip, color: C.textSecondary },
+  chipTextActive: { color: C.accent, fontWeight: "600" },
 });
diff --git a/app/src/components/Icon.tsx b/app/src/components/Icon.tsx
new file mode 100644
index 0000000..bfcf533
--- /dev/null
+++ b/app/src/components/Icon.tsx
@@ -0,0 +1,260 @@
+// A tiny geometric icon set drawn from plain Views.
+//
+// The app ships no vector-icon dependency and emoji render differently on
+// every platform (and can't take the accent colour), so these are built from
+// borders and rectangles instead: monochrome, tintable, pixel-identical on
+// Android and web, and zero bytes of new dependency.
+import { StyleSheet, View } from "react-native";
+import { C } from "../lib/theme";
+
+export type IconName =
+  | "today"
+  | "next"
+  | "waiting"
+  | "someday"
+  | "projects"
+  | "review"
+  | "settings"
+  | "plus"
+  | "chevron";
+
+type Props = {
+  name: IconName;
+  size?: number;
+  color?: string;
+  /** Used to carve the crescent out of the "someday" moon. */
+  bg?: string;
+};
+
+export default function Icon({ name, size = 22, color = C.textSecondary, bg = C.bg }: Props) {
+  const box = { width: size, height: size };
+  const w = 1.7; // one consistent stroke weight across the whole set
+
+  switch (name) {
+    case "today":
+      return (
+        <View style={[box, s.center]}>
+          <View
+            style={{
+              width: size * 0.86,
+              height: size * 0.82,
+              borderWidth: w,
+              borderColor: color,
+              borderRadius: 5,
+              overflow: "hidden",
+            }}
+          >
+            <View style={{ height: size * 0.2, backgroundColor: color }} />
+            <View style={[s.center, { flex: 1 }]}>
+              <View
+                style={{ width: w * 2, height: w * 2, borderRadius: 999, backgroundColor: color }}
+              />
+            </View>
+          </View>
+        </View>
+      );
+
+    case "next":
+      return (
+        <View style={[box, s.center]}>
+          <View
+            style={{
+              width: 0,
+              height: 0,
+              borderTopWidth: size * 0.32,
+              borderBottomWidth: size * 0.32,
+              borderLeftWidth: size * 0.52,
+              borderTopColor: "transparent",
+              borderBottomColor: "transparent",
+              borderLeftColor: color,
+              marginLeft: size * 0.12,
+            }}
+          />
+        </View>
+      );
+
+    case "waiting":
+      return (
+        <View style={[box, s.center]}>
+          <View
+            style={{
+              width: size * 0.84,
+              height: size * 0.84,
+              borderRadius: 999,
+              borderWidth: w,
+              borderColor: color,
+            }}
+          >
+            {/* hour hand, then minute hand — anchored at the dial centre */}
+            <View
+              style={{
+                position: "absolute",
+                left: size * 0.42 - w / 2,
+                top: size * 0.2,
+                width: w,
+                height: size * 0.22,
+                backgroundColor: color,
+                borderRadius: w,
+              }}
+            />
+            <View
+              style={{
+                position: "absolute",
+                left: size * 0.42 - w / 2,
+                top: size * 0.42 - w / 2,
+                width: size * 0.24,
+                height: w,
+                backgroundColor: color,
+                borderRadius: w,
+              }}
+            />
+          </View>
+        </View>
+      );
+
+    case "someday":
+      return (
+        <View style={[box, s.center]}>
+          <View
+            style={{
+              width: size * 0.84,
+              height: size * 0.84,
+              borderRadius: 999,
+              backgroundColor: color,
+              overflow: "hidden",
+            }}
+          >
+            <View
+              style={{
+                position: "absolute",
+                right: -size * 0.22,
+                top: -size * 0.26,
+                width: size * 0.84,
+                height: size * 0.84,
+                borderRadius: 999,
+                backgroundColor: bg,
+              }}
+            />
+          </View>
+        </View>
+      );
+
+    case "projects":
+      return (
+        <View style={[box, s.center]}>
+          <View style={{ width: size * 0.86, height: size * 0.78 }}>
+            <View
+              style={{
+                width: size * 0.4,
+                height: size * 0.16,
+                borderTopLeftRadius: 3,
+                borderTopRightRadius: 3,
+                backgroundColor: color,
+              }}
+            />
+            <View
+              style={{
+                flex: 1,
+                borderWidth: w,
+                borderColor: color,
+                borderRadius: 5,
+                borderTopLeftRadius: 0,
+              }}
+            />
+          </View>
+        </View>
+      );
+
+    case "review":
+      return (
+        <View style={[box, s.center]}>
+          {/* an open ring plus an arrowhead reads as "cycle" without an SVG path */}
+          <View
+            style={{
+              width: size * 0.82,
+              height: size * 0.82,
+              borderRadius: 999,
+              borderWidth: w,
+              borderColor: color,
+              borderTopColor: "transparent",
+              transform: [{ rotate: "45deg" }],
+            }}
+          />
+          <View
+            style={{
+              position: "absolute",
+              top: size * 0.06,
+              right: size * 0.12,
+              width: 0,
+              height: 0,
+              borderLeftWidth: size * 0.16,
+              borderRightWidth: size * 0.16,
+              borderBottomWidth: size * 0.2,
+              borderLeftColor: "transparent",
+              borderRightColor: "transparent",
+              borderBottomColor: color,
+              transform: [{ rotate: "115deg" }],
+            }}
+          />
+        </View>
+      );
+
+    case "settings":
+      // Sliders, not a cog: three strokes with offset knobs stays legible at 20px.
+      return (
+        <View style={[box, s.center]}>
+          <View style={{ width: size * 0.88, gap: size * 0.16 }}>
+            {[0.62, 0.3, 0.48].map((knob, i) => (
+              <View key={i} style={s.sliderRow}>
+                <View style={{ flex: 1, height: w, backgroundColor: color, borderRadius: w }} />
+                <View
+                  style={{
+                    position: "absolute",
+                    left: `${knob * 100}%`,
+                    width: w * 3,
+                    height: w * 3,
+                    marginLeft: -w * 1.5,
+                    marginTop: -w,
+                    borderRadius: 999,
+                    borderWidth: w,
+                    borderColor: color,
+                    backgroundColor: bg,
+                  }}
+                />
+              </View>
+            ))}
+          </View>
+        </View>
+      );
+
+    case "plus":
+      return (
+        <View style={[box, s.center]}>
+          <View style={{ position: "absolute", width: size * 0.7, height: w + 0.5, borderRadius: 2, backgroundColor: color }} />
+          <View style={{ position: "absolute", width: w + 0.5, height: size * 0.7, borderRadius: 2, backgroundColor: color }} />
+        </View>
+      );
+
+    case "chevron":
+      return (
+        <View style={[box, s.center]}>
+          <View
+            style={{
+              width: size * 0.34,
+              height: size * 0.34,
+              borderRightWidth: w,
+              borderTopWidth: w,
+              borderColor: color,
+              transform: [{ rotate: "45deg" }],
+              marginLeft: -size * 0.06,
+            }}
+          />
+        </View>
+      );
+  }
+}
+
+const s = StyleSheet.create({
+  center: { alignItems: "center", justifyContent: "center" },
+  sliderRow: { justifyContent: "center" },
+});
diff --git a/app/src/components/PriorityChips.tsx b/app/src/components/PriorityChips.tsx
index 69fd002..a57c7e2 100644
--- a/app/src/components/PriorityChips.tsx
+++ b/app/src/components/PriorityChips.tsx
@@ -1,8 +1,9 @@
 import { Pressable, StyleSheet, Text, View } from "react-native";
 import { haptic } from "../lib/haptics";
-import { PRIORITIES, PRIORITY_COLOR, PRIORITY_LABEL } from "../lib/priority";
-import { C } from "../lib/theme";
+import { PRIORITIES, PRIORITY_COLOR, PRIORITY_LABEL, PRIORITY_TINT } from "../lib/priority";
+import { C, radius, space, type } from "../lib/theme";
 import type { Task } from "../lib/types";
+import { SectionHeader } from "./ui";
 
 export default function PriorityChips({
   value,
@@ -12,8 +13,8 @@ export default function PriorityChips({
   onChange: (p: Task["priority"]) => void;
 }) {
   return (
-    <View style={{ marginBottom: 14 }}>
-      <Text style={s.label}>Priority</Text>
+    <View style={s.wrap}>
+      <SectionHeader>Priority</SectionHeader>
       <View style={s.rowWrap}>
         {PRIORITIES.map((p) => {
           const active = value === p;
@@ -21,14 +22,20 @@ export default function PriorityChips({
           return (
             <Pressable
               key={p}
-              style={[s.chip, active && { borderColor: color, backgroundColor: `${color}22` }]}
+              style={({ pressed }) => [
+                s.chip,
+                active && { borderColor: color, backgroundColor: PRIORITY_TINT[p] },
+                pressed && !active && { backgroundColor: C.surface2 },
+              ]}
               onPress={() => {
                 haptic.select();
                 onChange(p);
               }}
             >
               <View style={[s.flag, { backgroundColor: color }]} />
-              <Text style={[s.text, active && { color: C.text }]}>{PRIORITY_LABEL[p]}</Text>
+              <Text style={[s.text, active && { color, fontWeight: "600" }]}>
+                {PRIORITY_LABEL[p]}
+              </Text>
             </Pressable>
           );
         })}
@@ -38,19 +45,19 @@ export default function PriorityChips({
 }
 
 const s = StyleSheet.create({
-  label: { color: C.muted, fontSize: 13, marginBottom: 6, textTransform: "uppercase", letterSpacing: 0.5 },
-  rowWrap: { flexDirection: "row", flexWrap: "wrap", gap: 8 },
+  wrap: { marginBottom: space.lg },
+  rowWrap: { flexDirection: "row", flexWrap: "wrap", gap: space.sm },
   chip: {
     flexDirection: "row",
     alignItems: "center",
     gap: 7,
-    paddingVertical: 8,
-    paddingHorizontal: 13,
-    borderRadius: 20,
+    paddingVertical: 9,
+    paddingHorizontal: 14,
+    borderRadius: radius.pill,
     backgroundColor: C.surface,
     borderWidth: 1,
     borderColor: C.border,
   },
-  flag: { width: 10, height: 10, borderRadius: 5 },
-  text: { color: C.muted, fontSize: 14 },
+  flag: { width: 9, height: 9, borderRadius: 999 },
+  text: { ...type.chip, color: C.textSecondary },
 });
diff --git a/app/src/components/TaskListScreen.tsx b/app/src/components/TaskListScreen.tsx
index 813a05b..f9ad91d 100644
--- a/app/src/components/TaskListScreen.tsx
+++ b/app/src/components/TaskListScreen.tsx
@@ -3,10 +3,10 @@ import { Pressable, RefreshControl, StyleSheet, Text, View } from "react-native"
 import DraggableFlatList, { ScaleDecorator } from "react-native-draggable-flatlist";
 import { haptic } from "../lib/haptics";
 import { reorderTask, sync, tasksByStatus, visibleTasksByStatus } from "../lib/store";
-import { C } from "../lib/theme";
+import { C, radius, shadow, space, type } from "../lib/theme";
 import { useStore } from "../lib/useStore";
 import type { TaskStatus } from "../lib/types";
-import TaskRow from "./TaskRow";
+import TaskRow, { TaskSeparator } from "./TaskRow";
 
 // Deferred tasks are hidden from these lists until their date — you can't act
 // on them yet, so they shouldn't cost attention. A one-line footer keeps them
@@ -50,13 +50,31 @@ export default function TaskListScreen({
             reorderTask(data[to].id, status, to);
           }
         }}
-        renderItem={({ item, drag, isActive }) => (
-          <ScaleDecorator activeScale={1.03}>
-            <View style={isActive && s.activeRow}>
-              <TaskRow task={item} uncheckTo={status === "done" ? "next" : status} onLongPress={archive ? undefined : drag} />
-            </View>
-          </ScaleDecorator>
-        )}
+        // The card is drawn by the rows themselves so drag-and-drop still owns
+        // the whole list: first/last rows round their outer corners, and a
+        // lifted row goes full-radius so it reads as detached from the stack.
+        renderItem={({ item, drag, isActive, getIndex }) => {
+          const i = getIndex() ?? 0;
+          return (
+            <ScaleDecorator activeScale={1.02}>
+              <View
+                style={[
+                  s.row,
+                  i === 0 && s.first,
+                  i === tasks.length - 1 && s.last,
+                  isActive && s.lifted,
+                ]}
+              >
+                <TaskRow
+                  task={item}
+                  uncheckTo={status === "done" ? "next" : status}
+                  onLongPress={archive ? undefined : drag}
+                />
+              </View>
+            </ScaleDecorator>
+          );
+        }}
+        ItemSeparatorComponent={TaskSeparator}
         refreshControl={
           <RefreshControl
             refreshing={refreshing}
@@ -71,14 +89,17 @@ export default function TaskListScreen({
         ListEmptyComponent={<Text style={s.empty}>{emptyHint}</Text>}
         ListFooterComponent={
           hidesDeferred && (hiddenCount > 0 || showDeferred) ? (
-            <Pressable onPress={() => setShowDeferred((v) => !v)}>
-              <Text style={s.deferredFooter}>
-                {showDeferred ? "hide deferred" : `⏸ ${hiddenCount} deferred — show`}
+            <Pressable
+              onPress={() => setShowDeferred((v) => !v)}
+              style={({ pressed }) => [s.deferredBtn, pressed && { opacity: 0.6 }]}
+            >
+              <Text style={s.deferredText}>
+                {showDeferred ? "Hide deferred" : `${hiddenCount} deferred — show`}
               </Text>
             </Pressable>
           ) : null
         }
-        contentContainerStyle={{ paddingBottom: 32 }}
+        contentContainerStyle={s.content}
       />
     </View>
   );
@@ -86,7 +107,23 @@ export default function TaskListScreen({
 
 const s = StyleSheet.create({
   screen: { flex: 1, backgroundColor: C.bg },
-  activeRow: { backgroundColor: C.surface2, borderRadius: 12 },
-  empty: { color: C.muted, textAlign: "center", marginTop: 48, fontSize: 15 },
-  deferredFooter: { color: C.muted, fontSize: 13, textAlign: "center", paddingVertical: 14 },
+  content: { paddingHorizontal: space.lg, paddingTop: space.md, paddingBottom: 96 },
+  row: { backgroundColor: C.surface },
+  first: { borderTopLeftRadius: radius.lg, borderTopRightRadius: radius.lg },
+  last: {
+    borderBottomLeftRadius: radius.lg,
+    borderBottomRightRadius: radius.lg,
+    ...shadow.card,
+  },
+  lifted: { borderRadius: radius.lg, ...shadow.fab },
+  empty: {
+    ...type.body,
+    color: C.muted,
+    textAlign: "center",
+    marginTop: 72,
+    paddingHorizontal: space.xxl,
+    lineHeight: 22,
+  },
+  deferredBtn: { paddingVertical: space.lg, alignItems: "center" },
+  deferredText: { ...type.meta, color: C.textSecondary, fontWeight: "500" },
 });
diff --git a/app/src/components/TaskRow.tsx b/app/src/components/TaskRow.tsx
index 7850d6b..1bfc709 100644
--- a/app/src/components/TaskRow.tsx
+++ b/app/src/components/TaskRow.tsx
@@ -5,7 +5,7 @@ import { dueMeta, friendlyDate, isDeferred } from "../lib/dates";
 import { haptic } from "../lib/haptics";
 import { formatEstimate, PRIORITY_COLOR } from "../lib/priority";
 import { updateTask } from "../lib/store";
-import { C } from "../lib/theme";
+import { C, radius, space, type } from "../lib/theme";
 import type { Task, TaskStatus } from "../lib/types";
 
 export default function TaskRow({
@@ -22,6 +22,7 @@ export default function TaskRow({
   onLongPress?: () => void;
 }) {
   const router = useRouter();
+  const done = task.status === "done";
   // Due date is rendered separately so it can carry a tone color; the reader
   // sees "due today" in amber, never does date math on an ISO string.
   const due = task.due_date ? dueMeta(task.due_date) : null;
@@ -37,33 +38,42 @@ export default function TaskRow({
     .filter(Boolean)
     .join("  ·  ");
   const meta = base || due;
+  const flag = PRIORITY_COLOR[task.priority];
 
   const toggle = () => {
-    const done = task.status !== "done";
-    if (done) haptic.success();
+    const next = task.status !== "done";
+    if (next) haptic.success();
     else haptic.tap();
-    updateTask(task.id, { status: done ? "done" : uncheckTo });
+    updateTask(task.id, { status: next ? "done" : uncheckTo });
   };
 
   return (
     <Animated.View entering={FadeIn.duration(150)}>
-      <Pressable style={s.row} onPress={() => router.push(`/task/${task.id}`)} onLongPress={onLongPress} delayLongPress={200}>
+      <Pressable
+        style={({ pressed }) => [s.row, pressed && s.rowPressed]}
+        onPress={() => router.push(`/task/${task.id}`)}
+        onLongPress={onLongPress}
+        delayLongPress={200}
+      >
+        {/* Rounded square rather than a circle — the Things checkbox shape.
+            The border carries the priority colour, so priority is legible at a
+            glance without spending a whole column on a flag. */}
         <Pressable
-          style={[s.checkbox, { borderColor: PRIORITY_COLOR[task.priority] }]}
+          style={[s.checkbox, { borderColor: done ? C.done : flag }, done && s.checkboxDone]}
           hitSlop={10}
           onPress={toggle}
         >
-          {task.status === "done" && <View style={s.checkboxFill} />}
+          {done && <Text style={s.check}>✓</Text>}
         </Pressable>
         <View style={{ flex: 1 }}>
-          <Text style={s.title} numberOfLines={2}>
+          <Text style={[s.title, done && s.titleDone]} numberOfLines={2}>
             {task.title}
           </Text>
           {!!meta && (
-            <Text style={s.meta}>
+            <Text style={s.meta} numberOfLines={1}>
               {base}
               {!!base && !!due && "  ·  "}
-              {due && <Text style={{ color: dueColor }}>{due.label}</Text>}
+              {due && <Text style={{ color: dueColor, fontWeight: "500" }}>{due.label}</Text>}
             </Text>
           )}
         </View>
@@ -76,21 +86,40 @@ const s = StyleSheet.create({
   row: {
     flexDirection: "row",
     alignItems: "center",
-    gap: 12,
-    paddingVertical: 14,
-    paddingHorizontal: 16,
-    borderBottomWidth: StyleSheet.hairlineWidth,
-    borderBottomColor: C.border,
+    gap: space.md,
+    paddingVertical: space.md + 2,
+    paddingHorizontal: space.lg,
+    backgroundColor: C.surface,
   },
+  rowPressed: { backgroundColor: C.surface2 },
   checkbox: {
     width: 22,
     height: 22,
-    borderRadius: 11,
-    borderWidth: 2,
+    borderRadius: 7,
+    borderWidth: 1.5,
     alignItems: "center",
     justifyContent: "center",
   },
-  checkboxFill: { width: 12, height: 12, borderRadius: 6, backgroundColor: C.done },
-  title: { color: C.text, fontSize: 16 },
-  meta: { color: C.muted, fontSize: 13, marginTop: 2 },
+  checkboxDone: { backgroundColor: C.done },
+  check: { color: "#FFFFFF", fontSize: 13, lineHeight: 16, fontWeight: "700" },
+  title: { ...type.row, color: C.text },
+  titleDone: { color: C.muted, textDecorationLine: "line-through" },
+  meta: { ...type.meta, color: C.muted, marginTop: 3 },
 });
+
+/** Inset hairline sized to line up under the task title, not the checkbox. */
+export const TASK_ROW_INSET = space.lg + 22 + space.md;
+
+export function TaskSeparator() {
+  return (
+    <View
+      style={{
+        height: StyleSheet.hairlineWidth,
+        backgroundColor: C.separator,
+        marginLeft: TASK_ROW_INSET,
+        // Keeps the hairline from showing through a card's rounded corner.
+        borderRadius: radius.sm,
+      }}
+    />
+  );
+}
diff --git a/app/src/components/ui.tsx b/app/src/components/ui.tsx
index 4866db2..87bd74b 100644
--- a/app/src/components/ui.tsx
+++ b/app/src/components/ui.tsx
@@ -1,9 +1,63 @@
-import { Pressable, StyleSheet, Text, TextInput, View, type TextInputProps } from "react-native";
-import { C } from "../lib/theme";
+import { Pressable, StyleSheet, Text, TextInput, View, type TextInputProps, type ViewStyle } from "react-native";
+import { C, radius, shadow, space, type } from "../lib/theme";
+
+/**
+ * Screen background + consistent gutter. Every screen sits on the grouped
+ * background so white cards read as raised paper.
+ */
+export function Screen({ children, style }: { children: React.ReactNode; style?: ViewStyle }) {
+  return <View style={[u.screen, style]}>{children}</View>;
+}
+
+/**
+ * Large in-content heading. Nav-bar titles are tiny and centred; Things puts
+ * the screen name in the content at display size, which is what gives each
+ * screen its sense of place.
+ */
+export function Title({ children, count }: { children: React.ReactNode; count?: number }) {
+  return (
+    <View style={u.titleRow}>
+      <Text style={u.title}>{children}</Text>
+      {count !== undefined && count > 0 && <Text style={u.titleCount}>{count}</Text>}
+    </View>
+  );
+}
+
+/** Small caps label above a group. Sentence case — SHOUTING CAPS reads dated. */
+export function SectionHeader({ children, tone }: { children: React.ReactNode; tone?: string }) {
+  return <Text style={[u.sectionHeader, !!tone && { color: tone }]}>{children}</Text>;
+}
+
+/**
+ * Rounded white group. Rows inside are separated by inset hairlines rather
+ * than full-bleed dividers, so the card keeps a clean silhouette.
+ */
+export function Card({ children, style }: { children: React.ReactNode; style?: ViewStyle }) {
+  return <View style={[u.card, style]}>{children}</View>;
+}
+
+/** Inset hairline for use between rows inside a `Card`. */
+export function Separator({ inset = 0 }: { inset?: number }) {
+  return <View style={[u.separator, { marginLeft: inset }]} />;
+}
+
+/** Compact count/status pill. */
+export function Pill({ label, tone }: { label: string; tone?: string }) {
+  return (
+    <View style={[u.pill, !!tone && { backgroundColor: `${tone}18` }]}>
+      <Text style={[u.pillText, !!tone && { color: tone }]}>{label}</Text>
+    </View>
+  );
+}
+
+/** Centred empty state. One quiet line — no illustration, no exclamation. */
+export function Empty({ children }: { children: React.ReactNode }) {
+  return <Text style={u.empty}>{children}</Text>;
+}
 
 export function Field({ label, ...props }: TextInputProps & { label: string }) {
   return (
-    <View style={{ marginBottom: 14 }}>
+    <View style={{ marginBottom: space.lg }}>
       <Text style={u.label}>{label}</Text>
       <TextInput style={u.input} placeholderTextColor={C.muted} {...props} />
     </View>
@@ -24,18 +78,21 @@ export function Chips<T extends string>({
   labels?: Record<string, string>;
 }) {
   return (
-    <View style={{ marginBottom: 14 }}>
+    <View style={{ marginBottom: space.lg }}>
       <Text style={u.label}>{label}</Text>
       <View style={u.chipRow}>
-        {options.map((o) => (
-          <Pressable
-            key={o}
-            style={[u.chip, value === o && u.chipActive]}
-            onPress={() => onChange(o)}
-          >
-            <Text style={[u.chipText, value === o && { color: C.text }]}>{labels?.[o] ?? o}</Text>
-          </Pressable>
-        ))}
+        {options.map((o) => {
+          const active = value === o;
+          return (
+            <Pressable
+              key={o}
+              style={({ pressed }) => [u.chip, active && u.chipActive, pressed && !active && u.chipPressed]}
+              onPress={() => onChange(o)}
+            >
+              <Text style={[u.chipText, active && u.chipTextActive]}>{labels?.[o] ?? o}</Text>
+            </Pressable>
+          );
+        })}
       </View>
     </View>
   );
@@ -45,50 +102,108 @@ export function Button({
   title,
   onPress,
   danger,
+  secondary,
 }: {
   title: string;
   onPress: () => void;
   danger?: boolean;
+  secondary?: boolean;
 }) {
+  const variant = danger ? u.buttonDanger : secondary ? u.buttonSecondary : null;
+  const textVariant = danger ? u.buttonTextDanger : secondary ? u.buttonTextSecondary : null;
   return (
     <Pressable
-      style={[u.button, danger && { backgroundColor: "transparent", borderColor: C.danger, borderWidth: 1 }]}
+      style={({ pressed }) => [u.button, variant, pressed && { opacity: 0.75 }]}
       onPress={onPress}
     >
-      <Text style={[u.buttonText, danger && { color: C.danger }]}>{title}</Text>
+      <Text style={[u.buttonText, textVariant]}>{title}</Text>
     </Pressable>
   );
 }
 
 const u = StyleSheet.create({
-  label: { color: C.muted, fontSize: 13, marginBottom: 6, textTransform: "uppercase", letterSpacing: 0.5 },
+  screen: { flex: 1, backgroundColor: C.bg },
+
+  titleRow: {
+    flexDirection: "row",
+    alignItems: "center",
+    gap: space.md,
+    paddingHorizontal: space.lg,
+    paddingTop: space.md,
+    paddingBottom: space.lg,
+  },
+  title: { ...type.title, color: C.text },
+  titleCount: { ...type.title, color: C.muted, fontWeight: "600" },
+
+  sectionHeader: {
+    ...type.section,
+    color: C.textSecondary,
+    paddingHorizontal: space.xs,
+    paddingTop: space.xl,
+    paddingBottom: space.sm,
+  },
+
+  card: {
+    backgroundColor: C.surface,
+    borderRadius: radius.lg,
+    borderWidth: StyleSheet.hairlineWidth,
+    borderColor: C.border,
+    overflow: "hidden",
+    ...shadow.card,
+  },
+  separator: { height: StyleSheet.hairlineWidth, backgroundColor: C.separator },
+
+  pill: {
+    paddingHorizontal: space.sm,
+    paddingVertical: 3,
+    borderRadius: radius.pill,
+    backgroundColor: C.surface2,
+  },
+  pillText: { ...type.meta, color: C.textSecondary, fontWeight: "500" },
+
+  empty: { color: C.muted, textAlign: "center", marginTop: 56, ...type.body },
+
+  label: {
+    ...type.section,
+    color: C.textSecondary,
+    marginBottom: space.sm,
+  },
   input: {
     backgroundColor: C.surface,
     color: C.text,
-    borderRadius: 10,
-    borderWidth: 1,
+    borderRadius: radius.md,
+    borderWidth: StyleSheet.hairlineWidth,
     borderColor: C.border,
-    padding: 12,
+    paddingHorizontal: space.md,
+    paddingVertical: space.md,
     fontSize: 16,
   },
-  chipRow: { flexDirection: "row", flexWrap: "wrap", gap: 8 },
+
+  chipRow: { flexDirection: "row", flexWrap: "wrap", gap: space.sm },
   chip: {
-    paddingVertical: 8,
-    paddingHorizontal: 14,
-    borderRadius: 20,
+    paddingVertical: space.sm,
+    paddingHorizontal: space.lg - 2,
+    borderRadius: radius.pill,
     backgroundColor: C.surface,
-    borderWidth: 1,
+    borderWidth: StyleSheet.hairlineWidth,
     borderColor: C.border,
   },
-  chipActive: { backgroundColor: C.surface2, borderColor: C.accent },
-  chipText: { color: C.muted, fontSize: 14 },
+  chipActive: { backgroundColor: C.accentSoft, borderColor: C.accent },
+  chipPressed: { backgroundColor: C.surface2 },
+  chipText: { ...type.chip, color: C.textSecondary },
+  chipTextActive: { color: C.accent, fontWeight: "600" },
+
   button: {
     backgroundColor: C.accent,
-    borderRadius: 10,
-    padding: 14,
+    borderRadius: radius.md,
+    paddingVertical: space.lg - 2,
     alignItems: "center",
-    marginTop: 8,
-    marginBottom: 12,
+    marginTop: space.sm,
+    marginBottom: space.md,
   },
-  buttonText: { color: C.text, fontSize: 16, fontWeight: "600" },
+  buttonDanger: { backgroundColor: "transparent", borderWidth: StyleSheet.hairlineWidth, borderColor: C.danger },
+  buttonSecondary: { backgroundColor: C.surface, borderWidth: StyleSheet.hairlineWidth, borderColor: C.border },
+  buttonText: { fontSize: 16, fontWeight: "600", color: C.onAccent },
+  buttonTextDanger: { color: C.danger },
+  buttonTextSecondary: { color: C.text },
 });
diff --git a/app/src/lib/priority.ts b/app/src/lib/priority.ts
index 47f144a..bfade3c 100644
--- a/app/src/lib/priority.ts
+++ b/app/src/lib/priority.ts
@@ -9,11 +9,21 @@ export const PRIORITY_LABEL: Record<Task["priority"], string> = {
   4: "Low",
 };
 
+// Todoist's flag mapping (urgent red → low grey), retuned to sit calmly on a
+// light canvas. `PRIORITY_TINT` is the same hue at wash strength, for the
+// selected state of a chip — a saturated fill would shout on a white card.
 export const PRIORITY_COLOR: Record<Task["priority"], `#${string}`> = {
-  1: "#E05B5B",
-  2: "#E0A93E",
-  3: "#5B8DEF",
-  4: "#6B7280",
+  1: "#E5484D",
+  2: "#D98324",
+  3: "#2F6FED",
+  4: "#9A9AA2",
+};
+
+export const PRIORITY_TINT: Record<Task["priority"], `#${string}`> = {
+  1: "#FDECEC",
+  2: "#FBF0E2",
+  3: "#E8F0FE",
+  4: "#F0F0F3",
 };
 
 export function formatEstimate(min: number | null): string | null {
diff --git a/app/src/lib/theme.ts b/app/src/lib/theme.ts
index 087ef43..cea5cb3 100644
--- a/app/src/lib/theme.ts
+++ b/app/src/lib/theme.ts
@@ -1,12 +1,115 @@
-export const C = {
-  bg: "#0F1115",
-  surface: "#1A1D24",
-  surface2: "#232733",
-  border: "#2C313D",
-  text: "#E6E8EC",
-  muted: "#8A909C",
-  accent: "#5B8DEF",
-  done: "#4CAF7D",
-  danger: "#E05B5B",
-  warn: "#E0A93E",
+// Design tokens.
+//
+// The look is modelled on Things 3: a light, calm canvas, generous whitespace,
+// hairline inset separators instead of boxes, and exactly one accent colour
+// used sparingly. Everything visual in the app resolves through this file —
+// no component hard-codes a hex value (priority flags are the one exception,
+// and they live in `priority.ts` alongside their labels).
+
+/** Named palette. `dark` is complete and ready to wire to a theme toggle. */
+const light = {
+  /** Screen background behind grouped content. */
+  bg: "#F7F7F9",
+  /** Card / row surface that sits on `bg`. */
+  surface: "#FFFFFF",
+  /** Inputs, pressed states, subtle fills. */
+  surface2: "#EFEFF3",
+  /** Card outline. Deliberately barely-there. */
+  border: "#E6E6EB",
+  /** Inset hairline between rows inside a card. */
+  separator: "#ECECF0",
+  /** Primary reading colour. Near-black, never pure #000. */
+  text: "#16161A",
+  /** Supporting copy that should still be comfortably readable. */
+  textSecondary: "#6E6E76",
+  /** Metadata, placeholders, de-emphasised chrome. */
+  muted: "#9A9AA2",
+  accent: "#2F6FED",
+  /** Tinted accent wash for selected chips and active states. */
+  accentSoft: "#E8F0FE",
+  done: "#2FA36B",
+  danger: "#E5484D",
+  warn: "#D98324",
+  /** Text that sits on top of `accent`. */
+  onAccent: "#FFFFFF",
+} as const;
+
+const dark = {
+  bg: "#0C0C0F",
+  surface: "#17171B",
+  surface2: "#212127",
+  border: "#2A2A31",
+  separator: "#26262C",
+  text: "#F2F2F5",
+  textSecondary: "#A6A6B0",
+  muted: "#7A7A85",
+  accent: "#4C86F0",
+  accentSoft: "#1B2740",
+  done: "#3FBF84",
+  danger: "#F0605F",
+  warn: "#E0A93E",
+  onAccent: "#FFFFFF",
+} as const;
+
+export const PALETTES = { light, dark } as const;
+
+/**
+ * Active palette. Styles are created at module scope (StyleSheet.create) so
+ * this is a static choice rather than a hook — switching themes at runtime
+ * would mean moving every stylesheet inside its component.
+ */
+export const C = light;
+
+/** 4pt spacing grid. Screen gutter is `space.lg`. */
+export const space = {
+  xs: 4,
+  sm: 8,
+  md: 12,
+  lg: 16,
+  xl: 20,
+  xxl: 28,
+} as const;
+
+export const radius = {
+  sm: 8,
+  md: 12,
+  /** Cards and grouped lists. */
+  lg: 16,
+  /** Chips and pills. */
+  pill: 999,
+} as const;
+
+/**
+ * Type scale. `title` is the large in-content screen heading that replaces a
+ * cramped nav-bar title; `row` is the task title size — 17pt, matching the
+ * platform body size Things and Todoist both settle on.
+ */
+export const type = {
+  title: { fontSize: 30, fontWeight: "700", letterSpacing: -0.6 },
+  section: { fontSize: 13, fontWeight: "600", letterSpacing: 0.3 },
+  row: { fontSize: 17, letterSpacing: -0.2 },
+  body: { fontSize: 15 },
+  meta: { fontSize: 13 },
+  chip: { fontSize: 14, fontWeight: "500" },
+} as const;
+
+/**
+ * Card elevation. Kept extremely soft — a Things-like surface reads as paper,
+ * not as a floating panel.
+ */
+export const shadow = {
+  card: {
+    shadowColor: "#0B0B12",
+    shadowOpacity: 0.05,
+    shadowRadius: 10,
+    shadowOffset: { width: 0, height: 2 },
+    elevation: 1,
+  },
+  fab: {
+    shadowColor: "#0B0B12",
+    shadowOpacity: 0.22,
+    shadowRadius: 14,
+    shadowOffset: { width: 0, height: 6 },
+    elevation: 6,
+  },
 } as const;