From 7e04941bccb2683f8a6e3ee38a99c50129234dd1 Mon Sep 17 00:00:00 2001
From: Lena <lena@omega>
Date: Thu, 1 Jan 2026 00:00:00 +0000
Subject: rsend: push phone folders to a home SSH host over rsync

A small Android app for one-way folder backup, a KISS alternative to
Syncthing. It bundles rsync (built from pinned source via the NDK) and
a pure-Go SSH transport, both shipped in the APK as lib*.so and run from
the native library directory.

rsend pins the host key, stores the ed25519 identity Keystore-encrypted,
pushes each folder additively or as a mirror, and runs on demand or on a
WiFi-only schedule. The build is self-contained and reproducible: make
setup provisions the toolchain, make builds rsync, rsh, and the APK.
---
 app/src/main/res/drawable/bg_button_primary.xml    |  10 +
 app/src/main/res/drawable/bg_button_secondary.xml  |  13 +
 app/src/main/res/drawable/bg_card.xml              |   9 +
 app/src/main/res/drawable/bg_chip.xml              |   6 +
 app/src/main/res/drawable/bg_input.xml             |  21 ++
 app/src/main/res/drawable/dot_off.xml              |  11 +
 app/src/main/res/drawable/dot_on.xml               |   8 +
 app/src/main/res/drawable/ic_chevron.xml           |   9 +
 app/src/main/res/drawable/ic_folder.xml            |   9 +
 app/src/main/res/drawable/ic_key.xml               |   9 +
 .../main/res/drawable/ic_launcher_background.xml   |   9 +
 .../main/res/drawable/ic_launcher_foreground.xml   |  14 +
 app/src/main/res/drawable/ic_notification.xml      |  10 +
 app/src/main/res/drawable/ic_remote.xml            |   9 +
 app/src/main/res/drawable/ic_schedule.xml          |  12 +
 app/src/main/res/layout/activity_folder.xml        | 123 ++++++
 app/src/main/res/layout/activity_log.xml           |  56 +++
 app/src/main/res/layout/activity_main.xml          | 413 +++++++++++++++++++++
 app/src/main/res/layout/activity_remote.xml        | 107 ++++++
 app/src/main/res/layout/activity_schedule.xml      |  75 ++++
 app/src/main/res/layout/app_toolbar.xml            |  11 +
 app/src/main/res/layout/dialog_key.xml             |  40 ++
 app/src/main/res/layout/item_folder.xml            |  48 +++
 app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml |   6 +
 app/src/main/res/values-night/colors.xml           |  18 +
 app/src/main/res/values/colors.xml                 |  20 +
 app/src/main/res/values/dimens.xml                 |  13 +
 app/src/main/res/values/strings.xml                |   3 +
 app/src/main/res/values/themes.xml                 | 103 +++++
 29 files changed, 1195 insertions(+)
 create mode 100644 app/src/main/res/drawable/bg_button_primary.xml
 create mode 100644 app/src/main/res/drawable/bg_button_secondary.xml
 create mode 100644 app/src/main/res/drawable/bg_card.xml
 create mode 100644 app/src/main/res/drawable/bg_chip.xml
 create mode 100644 app/src/main/res/drawable/bg_input.xml
 create mode 100644 app/src/main/res/drawable/dot_off.xml
 create mode 100644 app/src/main/res/drawable/dot_on.xml
 create mode 100644 app/src/main/res/drawable/ic_chevron.xml
 create mode 100644 app/src/main/res/drawable/ic_folder.xml
 create mode 100644 app/src/main/res/drawable/ic_key.xml
 create mode 100644 app/src/main/res/drawable/ic_launcher_background.xml
 create mode 100644 app/src/main/res/drawable/ic_launcher_foreground.xml
 create mode 100644 app/src/main/res/drawable/ic_notification.xml
 create mode 100644 app/src/main/res/drawable/ic_remote.xml
 create mode 100644 app/src/main/res/drawable/ic_schedule.xml
 create mode 100644 app/src/main/res/layout/activity_folder.xml
 create mode 100644 app/src/main/res/layout/activity_log.xml
 create mode 100644 app/src/main/res/layout/activity_main.xml
 create mode 100644 app/src/main/res/layout/activity_remote.xml
 create mode 100644 app/src/main/res/layout/activity_schedule.xml
 create mode 100644 app/src/main/res/layout/app_toolbar.xml
 create mode 100644 app/src/main/res/layout/dialog_key.xml
 create mode 100644 app/src/main/res/layout/item_folder.xml
 create mode 100644 app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
 create mode 100644 app/src/main/res/values-night/colors.xml
 create mode 100644 app/src/main/res/values/colors.xml
 create mode 100644 app/src/main/res/values/dimens.xml
 create mode 100644 app/src/main/res/values/strings.xml
 create mode 100644 app/src/main/res/values/themes.xml

(limited to 'app/src/main/res')

diff --git a/app/src/main/res/drawable/bg_button_primary.xml b/app/src/main/res/drawable/bg_button_primary.xml
new file mode 100644
index 0000000..c2a22f5
--- /dev/null
+++ b/app/src/main/res/drawable/bg_button_primary.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ripple xmlns:android="http://schemas.android.com/apk/res/android"
+    android:color="#33FFFFFF">
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="@color/button_primary_bg" />
+            <corners android:radius="@dimen/radius" />
+        </shape>
+    </item>
+</ripple>
diff --git a/app/src/main/res/drawable/bg_button_secondary.xml b/app/src/main/res/drawable/bg_button_secondary.xml
new file mode 100644
index 0000000..93c7ccd
--- /dev/null
+++ b/app/src/main/res/drawable/bg_button_secondary.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ripple xmlns:android="http://schemas.android.com/apk/res/android"
+    android:color="@color/surface_variant">
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="@color/surface" />
+            <corners android:radius="@dimen/radius" />
+            <stroke
+                android:width="@dimen/stroke"
+                android:color="@color/outline" />
+        </shape>
+    </item>
+</ripple>
diff --git a/app/src/main/res/drawable/bg_card.xml b/app/src/main/res/drawable/bg_card.xml
new file mode 100644
index 0000000..0971d54
--- /dev/null
+++ b/app/src/main/res/drawable/bg_card.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/surface" />
+    <corners android:radius="@dimen/radius" />
+    <stroke
+        android:width="@dimen/stroke"
+        android:color="@color/outline" />
+</shape>
diff --git a/app/src/main/res/drawable/bg_chip.xml b/app/src/main/res/drawable/bg_chip.xml
new file mode 100644
index 0000000..aecffef
--- /dev/null
+++ b/app/src/main/res/drawable/bg_chip.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/surface_variant" />
+    <corners android:radius="@dimen/radius_pill" />
+</shape>
diff --git a/app/src/main/res/drawable/bg_input.xml b/app/src/main/res/drawable/bg_input.xml
new file mode 100644
index 0000000..b87f6b3
--- /dev/null
+++ b/app/src/main/res/drawable/bg_input.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_focused="true">
+        <shape android:shape="rectangle">
+            <solid android:color="@color/surface" />
+            <corners android:radius="@dimen/radius" />
+            <stroke
+                android:width="2dp"
+                android:color="@color/accent" />
+        </shape>
+    </item>
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="@color/surface" />
+            <corners android:radius="@dimen/radius" />
+            <stroke
+                android:width="@dimen/stroke"
+                android:color="@color/outline" />
+        </shape>
+    </item>
+</selector>
diff --git a/app/src/main/res/drawable/dot_off.xml b/app/src/main/res/drawable/dot_off.xml
new file mode 100644
index 0000000..3115ccc
--- /dev/null
+++ b/app/src/main/res/drawable/dot_off.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <solid android:color="@android:color/transparent" />
+    <stroke
+        android:width="2dp"
+        android:color="@color/text_secondary" />
+    <size
+        android:width="10dp"
+        android:height="10dp" />
+</shape>
diff --git a/app/src/main/res/drawable/dot_on.xml b/app/src/main/res/drawable/dot_on.xml
new file mode 100644
index 0000000..396b841
--- /dev/null
+++ b/app/src/main/res/drawable/dot_on.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <solid android:color="@color/accent" />
+    <size
+        android:width="10dp"
+        android:height="10dp" />
+</shape>
diff --git a/app/src/main/res/drawable/ic_chevron.xml b/app/src/main/res/drawable/ic_chevron.xml
new file mode 100644
index 0000000..4c416de
--- /dev/null
+++ b/app/src/main/res/drawable/ic_chevron.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@color/text_secondary"
+        android:pathData="M10,6L8.59,7.41 13.17,12l-4.58,4.59L10,18l6,-6z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_folder.xml b/app/src/main/res/drawable/ic_folder.xml
new file mode 100644
index 0000000..b5b85f9
--- /dev/null
+++ b/app/src/main/res/drawable/ic_folder.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@color/text_secondary"
+        android:pathData="M10,4H4c-1.1,0 -1.99,0.9 -1.99,2L2,18c0,1.1 0.9,2 2,2h16c1.1,0 2,-0.9 2,-2V8c0,-1.1 -0.9,-2 -2,-2h-8l-2,-2z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_key.xml b/app/src/main/res/drawable/ic_key.xml
new file mode 100644
index 0000000..1d905df
--- /dev/null
+++ b/app/src/main/res/drawable/ic_key.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@color/text_secondary"
+        android:pathData="M12.65,10C11.83,7.67 9.61,6 7,6c-3.31,0 -6,2.69 -6,6s2.69,6 6,6c2.61,0 4.83,-1.67 5.65,-4H17v4h4v-4h2v-4H12.65zM7,14c-1.1,0 -2,-0.9 -2,-2s0.9,-2 2,-2 2,0.9 2,2 -0.9,2 -2,2z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_launcher_background.xml b/app/src/main/res/drawable/ic_launcher_background.xml
new file mode 100644
index 0000000..c468735
--- /dev/null
+++ b/app/src/main/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#23252B"
+        android:pathData="M0,0h108v108h-108z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_launcher_foreground.xml b/app/src/main/res/drawable/ic_launcher_foreground.xml
new file mode 100644
index 0000000..ff1dc35
--- /dev/null
+++ b/app/src/main/res/drawable/ic_launcher_foreground.xml
@@ -0,0 +1,14 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <!-- Checkmark inside the 72dp adaptive-icon safe zone. -->
+    <path
+        android:strokeColor="#FFFFFF"
+        android:strokeWidth="9"
+        android:strokeLineCap="round"
+        android:strokeLineJoin="round"
+        android:fillColor="#00000000"
+        android:pathData="M38,55 L49,67 L72,40" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_notification.xml b/app/src/main/res/drawable/ic_notification.xml
new file mode 100644
index 0000000..b4309dd
--- /dev/null
+++ b/app/src/main/res/drawable/ic_notification.xml
@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <!-- White silhouette; the system tints status-bar icons by alpha. -->
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M9,16.17L4.83,12l-1.42,1.41L9,19 21,7l-1.41,-1.41z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_remote.xml b/app/src/main/res/drawable/ic_remote.xml
new file mode 100644
index 0000000..c81a049
--- /dev/null
+++ b/app/src/main/res/drawable/ic_remote.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@color/text_secondary"
+        android:pathData="M19,15H5c-1.1,0 -2,0.9 -2,2v2c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2v-2c0,-1.1 -0.9,-2 -2,-2zM7,19c-0.55,0 -1,-0.45 -1,-1s0.45,-1 1,-1 1,0.45 1,1 -0.45,1 -1,1zM19,3H5c-1.1,0 -2,0.9 -2,2v2c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2V5c0,-1.1 -0.9,-2 -2,-2zM7,7C6.45,7 6,6.55 6,6s0.45,-1 1,-1 1,0.45 1,1 -0.45,1 -1,1z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_schedule.xml b/app/src/main/res/drawable/ic_schedule.xml
new file mode 100644
index 0000000..e125104
--- /dev/null
+++ b/app/src/main/res/drawable/ic_schedule.xml
@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@color/text_secondary"
+        android:pathData="M11.99,2C6.47,2 2,6.48 2,12s4.47,10 9.99,10C17.52,22 22,17.52 22,12S17.52,2 11.99,2zM12,20c-4.42,0 -8,-3.58 -8,-8s3.58,-8 8,-8 8,3.58 8,8 -3.58,8 -8,8z" />
+    <path
+        android:fillColor="@color/text_secondary"
+        android:pathData="M12.5,7H11v6l5.25,3.15 0.75,-1.23 -4.5,-2.67z" />
+</vector>
diff --git a/app/src/main/res/layout/activity_folder.xml b/app/src/main/res/layout/activity_folder.xml
new file mode 100644
index 0000000..1a15f00
--- /dev/null
+++ b/app/src/main/res/layout/activity_folder.xml
@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/appRoot"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <include layout="@layout/app_toolbar" />
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="@dimen/space_m">
+
+        <LinearLayout
+            style="@style/Widget.Rsend.Card"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:textAppearance="@style/TextAppearance.Rsend.Caption"
+                android:text="Name" />
+
+            <EditText
+                android:id="@+id/name"
+                style="@style/Widget.Rsend.EditText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:inputType="text"
+                android:hint="DCIM" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/space_m"
+                android:textAppearance="@style/TextAppearance.Rsend.Caption"
+                android:text="Local path" />
+
+            <EditText
+                android:id="@+id/local"
+                style="@style/Widget.Rsend.EditText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:inputType="textUri"
+                android:hint="/storage/emulated/0/DCIM" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/space_m"
+                android:textAppearance="@style/TextAppearance.Rsend.Caption"
+                android:text="Remote path" />
+
+            <EditText
+                android:id="@+id/remote"
+                style="@style/Widget.Rsend.EditText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:inputType="textUri"
+                android:hint="/backup/phone/DCIM" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/space_m"
+                android:textAppearance="@style/TextAppearance.Rsend.Caption"
+                android:text="Excludes (comma-separated)" />
+
+            <EditText
+                android:id="@+id/excludes"
+                style="@style/Widget.Rsend.EditText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:inputType="text"
+                android:hint=".thumbnails/, .trashed/" />
+
+            <Switch
+                android:id="@+id/delete"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/space_m"
+                android:textAppearance="@style/TextAppearance.Rsend.Body"
+                android:text="Mirror (delete on server when deleted locally)" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <Button
+                android:id="@+id/save"
+                style="@style/Widget.Rsend.Button.Primary"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:layout_marginEnd="@dimen/space_s"
+                android:text="Save" />
+
+            <Button
+                android:id="@+id/removeFolder"
+                style="@style/Widget.Rsend.Button.Secondary"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="Remove" />
+        </LinearLayout>
+    </LinearLayout>
+    </ScrollView>
+</LinearLayout>
diff --git a/app/src/main/res/layout/activity_log.xml b/app/src/main/res/layout/activity_log.xml
new file mode 100644
index 0000000..af15ec2
--- /dev/null
+++ b/app/src/main/res/layout/activity_log.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/appRoot"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <include layout="@layout/app_toolbar" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:orientation="vertical"
+        android:padding="@dimen/space_m">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:layout_marginBottom="@dimen/space_m">
+
+        <Button
+            android:id="@+id/refresh"
+            style="@style/Widget.Rsend.Button.Secondary"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:layout_marginEnd="@dimen/space_s"
+            android:text="Refresh" />
+
+        <Button
+            android:id="@+id/clear"
+            style="@style/Widget.Rsend.Button.Secondary"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Clear" />
+    </LinearLayout>
+
+    <ScrollView
+        style="@style/Widget.Rsend.Card"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1">
+
+        <TextView
+            android:id="@+id/log"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:textAppearance="@style/TextAppearance.Rsend.Mono"
+            android:textSize="11sp"
+            android:textIsSelectable="true" />
+    </ScrollView>
+    </LinearLayout>
+</LinearLayout>
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
new file mode 100644
index 0000000..d58f907
--- /dev/null
+++ b/app/src/main/res/layout/activity_main.xml
@@ -0,0 +1,413 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/appRoot"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <include layout="@layout/app_toolbar" />
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="@dimen/space_m">
+
+        <!-- Status hero -->
+        <LinearLayout
+            style="@style/Widget.Rsend.Card"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal"
+                android:gravity="center_vertical">
+
+                <TextView
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:textAppearance="@style/TextAppearance.Rsend.SectionHeader"
+                    android:text="Status" />
+
+                <TextView
+                    android:id="@+id/appVersion"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:textAppearance="@style/TextAppearance.Rsend.Caption" />
+            </LinearLayout>
+
+            <TextView
+                android:id="@+id/lastSync"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/space_s"
+                android:textAppearance="@style/TextAppearance.Rsend.Title"
+                android:textIsSelectable="true"
+                android:text="Last sync: never" />
+        </LinearLayout>
+
+        <!-- Primary action -->
+        <Button
+            android:id="@+id/btnSync"
+            style="@style/Widget.Rsend.Button.Primary"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="@dimen/space_m"
+            android:text="Sync now" />
+
+        <ProgressBar
+            android:id="@+id/syncBar"
+            style="?android:attr/progressBarStyleHorizontal"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:indeterminate="true"
+            android:visibility="gone" />
+
+        <TextView
+            android:id="@+id/syncStatus"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="@dimen/space_m"
+            android:textAppearance="@style/TextAppearance.Rsend.Caption"
+            android:visibility="gone" />
+
+        <!-- Setup -->
+        <LinearLayout
+            style="@style/Widget.Rsend.Card"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="@dimen/space_s"
+                android:textAppearance="@style/TextAppearance.Rsend.SectionHeader"
+                android:text="Setup" />
+
+            <LinearLayout
+                android:id="@+id/rowRemote"
+                style="@style/Widget.Rsend.Row"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <ImageView
+                    android:layout_width="24dp"
+                    android:layout_height="24dp"
+                    android:layout_marginEnd="@dimen/space_m"
+                    android:src="@drawable/ic_remote"
+                    android:contentDescription="@null" />
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Body"
+                        android:text="Remote" />
+
+                    <TextView
+                        android:id="@+id/remoteValue"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Caption" />
+                </LinearLayout>
+
+                <ImageView
+                    android:layout_width="20dp"
+                    android:layout_height="20dp"
+                    android:src="@drawable/ic_chevron"
+                    android:contentDescription="@null" />
+            </LinearLayout>
+
+            <View
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/stroke"
+                android:layout_marginStart="40dp"
+                android:background="@color/outline" />
+
+            <LinearLayout
+                android:id="@+id/rowKey"
+                style="@style/Widget.Rsend.Row"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <ImageView
+                    android:layout_width="24dp"
+                    android:layout_height="24dp"
+                    android:layout_marginEnd="@dimen/space_m"
+                    android:src="@drawable/ic_key"
+                    android:contentDescription="@null" />
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Body"
+                        android:text="Identity key" />
+
+                    <TextView
+                        android:id="@+id/keyValue"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Caption" />
+                </LinearLayout>
+
+                <ImageView
+                    android:layout_width="20dp"
+                    android:layout_height="20dp"
+                    android:src="@drawable/ic_chevron"
+                    android:contentDescription="@null" />
+            </LinearLayout>
+
+            <View
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/stroke"
+                android:layout_marginStart="40dp"
+                android:background="@color/outline" />
+
+            <LinearLayout
+                android:id="@+id/rowSchedule"
+                style="@style/Widget.Rsend.Row"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <ImageView
+                    android:layout_width="24dp"
+                    android:layout_height="24dp"
+                    android:layout_marginEnd="@dimen/space_m"
+                    android:src="@drawable/ic_schedule"
+                    android:contentDescription="@null" />
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Body"
+                        android:text="Schedule" />
+
+                    <TextView
+                        android:id="@+id/scheduleValue"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Caption" />
+                </LinearLayout>
+
+                <ImageView
+                    android:layout_width="20dp"
+                    android:layout_height="20dp"
+                    android:src="@drawable/ic_chevron"
+                    android:contentDescription="@null" />
+            </LinearLayout>
+        </LinearLayout>
+
+        <!-- Permissions -->
+        <LinearLayout
+            style="@style/Widget.Rsend.Card"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="@dimen/space_s"
+                android:textAppearance="@style/TextAppearance.Rsend.SectionHeader"
+                android:text="Permissions" />
+
+            <LinearLayout
+                android:id="@+id/rowAllFiles"
+                style="@style/Widget.Rsend.Row"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <View
+                    android:id="@+id/dotAllFiles"
+                    android:layout_width="10dp"
+                    android:layout_height="10dp"
+                    android:layout_marginStart="7dp"
+                    android:layout_marginEnd="@dimen/space_l"
+                    android:background="@drawable/dot_off" />
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Body"
+                        android:text="All-files access" />
+
+                    <TextView
+                        android:id="@+id/valAllFiles"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Caption" />
+                </LinearLayout>
+
+                <ImageView
+                    android:layout_width="20dp"
+                    android:layout_height="20dp"
+                    android:src="@drawable/ic_chevron"
+                    android:contentDescription="@null" />
+            </LinearLayout>
+
+            <View
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/stroke"
+                android:layout_marginStart="40dp"
+                android:background="@color/outline" />
+
+            <LinearLayout
+                android:id="@+id/rowNotif"
+                style="@style/Widget.Rsend.Row"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <View
+                    android:id="@+id/dotNotif"
+                    android:layout_width="10dp"
+                    android:layout_height="10dp"
+                    android:layout_marginStart="7dp"
+                    android:layout_marginEnd="@dimen/space_l"
+                    android:background="@drawable/dot_off" />
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Body"
+                        android:text="Notifications" />
+
+                    <TextView
+                        android:id="@+id/valNotif"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Caption" />
+                </LinearLayout>
+
+                <ImageView
+                    android:layout_width="20dp"
+                    android:layout_height="20dp"
+                    android:src="@drawable/ic_chevron"
+                    android:contentDescription="@null" />
+            </LinearLayout>
+
+            <View
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/stroke"
+                android:layout_marginStart="40dp"
+                android:background="@color/outline" />
+
+            <LinearLayout
+                android:id="@+id/rowBattery"
+                style="@style/Widget.Rsend.Row"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <View
+                    android:id="@+id/dotBattery"
+                    android:layout_width="10dp"
+                    android:layout_height="10dp"
+                    android:layout_marginStart="7dp"
+                    android:layout_marginEnd="@dimen/space_l"
+                    android:background="@drawable/dot_off" />
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Body"
+                        android:text="Battery" />
+
+                    <TextView
+                        android:id="@+id/valBattery"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="@style/TextAppearance.Rsend.Caption" />
+                </LinearLayout>
+
+                <ImageView
+                    android:layout_width="20dp"
+                    android:layout_height="20dp"
+                    android:src="@drawable/ic_chevron"
+                    android:contentDescription="@null" />
+            </LinearLayout>
+        </LinearLayout>
+
+        <!-- Folders -->
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/space_s"
+            android:layout_marginBottom="@dimen/space_s"
+            android:textAppearance="@style/TextAppearance.Rsend.SectionHeader"
+            android:text="Folders" />
+
+        <LinearLayout
+            android:id="@+id/folders"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <Button
+                android:id="@+id/btnAddFolder"
+                style="@style/Widget.Rsend.Button.Secondary"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:layout_marginEnd="@dimen/space_s"
+                android:text="+ Add folder" />
+
+            <Button
+                android:id="@+id/btnLog"
+                style="@style/Widget.Rsend.Button.Secondary"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="View log" />
+        </LinearLayout>
+    </LinearLayout>
+    </ScrollView>
+</LinearLayout>
diff --git a/app/src/main/res/layout/activity_remote.xml b/app/src/main/res/layout/activity_remote.xml
new file mode 100644
index 0000000..2c3ba4b
--- /dev/null
+++ b/app/src/main/res/layout/activity_remote.xml
@@ -0,0 +1,107 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/appRoot"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <include layout="@layout/app_toolbar" />
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="@dimen/space_m">
+
+        <LinearLayout
+            style="@style/Widget.Rsend.Card"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:textAppearance="@style/TextAppearance.Rsend.Caption"
+                android:text="Host" />
+
+            <EditText
+                android:id="@+id/host"
+                style="@style/Widget.Rsend.EditText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:inputType="textUri"
+                android:hint="home.example.org" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/space_m"
+                android:textAppearance="@style/TextAppearance.Rsend.Caption"
+                android:text="Port" />
+
+            <EditText
+                android:id="@+id/port"
+                style="@style/Widget.Rsend.EditText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:inputType="number"
+                android:hint="22" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/space_m"
+                android:textAppearance="@style/TextAppearance.Rsend.Caption"
+                android:text="User" />
+
+            <EditText
+                android:id="@+id/user"
+                style="@style/Widget.Rsend.EditText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:inputType="text"
+                android:hint="backup" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <Button
+                android:id="@+id/test"
+                style="@style/Widget.Rsend.Button.Secondary"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:layout_marginEnd="@dimen/space_s"
+                android:text="Test connection" />
+
+            <Button
+                android:id="@+id/save"
+                style="@style/Widget.Rsend.Button.Primary"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="Save" />
+        </LinearLayout>
+
+        <TextView
+            android:id="@+id/status"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/space_m"
+            android:textAppearance="@style/TextAppearance.Rsend.Mono"
+            android:textIsSelectable="true" />
+    </LinearLayout>
+    </ScrollView>
+</LinearLayout>
diff --git a/app/src/main/res/layout/activity_schedule.xml b/app/src/main/res/layout/activity_schedule.xml
new file mode 100644
index 0000000..981d6a9
--- /dev/null
+++ b/app/src/main/res/layout/activity_schedule.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/appRoot"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <include layout="@layout/app_toolbar" />
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="@dimen/space_m">
+
+        <LinearLayout
+            style="@style/Widget.Rsend.Card"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <Switch
+                android:id="@+id/enabled"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:textAppearance="@style/TextAppearance.Rsend.Body"
+                android:text="Auto-sync on a schedule" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/space_m"
+                android:textAppearance="@style/TextAppearance.Rsend.Caption"
+                android:text="Interval (minutes, minimum 1)" />
+
+            <EditText
+                android:id="@+id/interval"
+                style="@style/Widget.Rsend.EditText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:inputType="number"
+                android:hint="120" />
+
+            <Switch
+                android:id="@+id/wifiOnly"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/space_m"
+                android:textAppearance="@style/TextAppearance.Rsend.Body"
+                android:text="WiFi only (unmetered networks)" />
+
+            <Switch
+                android:id="@+id/charging"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/space_m"
+                android:textAppearance="@style/TextAppearance.Rsend.Body"
+                android:text="Only while charging" />
+        </LinearLayout>
+
+        <Button
+            android:id="@+id/save"
+            style="@style/Widget.Rsend.Button.Primary"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Save" />
+    </LinearLayout>
+    </ScrollView>
+</LinearLayout>
diff --git a/app/src/main/res/layout/app_toolbar.xml b/app/src/main/res/layout/app_toolbar.xml
new file mode 100644
index 0000000..12eeb47
--- /dev/null
+++ b/app/src/main/res/layout/app_toolbar.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Shared title bar. The theme is NoActionBar so each screen hosts its own
+     Toolbar; the dark overlay gives the title light text on the dark bar. -->
+<androidx.appcompat.widget.Toolbar
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/toolbar"
+    android:layout_width="match_parent"
+    android:layout_height="?attr/actionBarSize"
+    android:background="@color/bar"
+    android:elevation="4dp"
+    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />
diff --git a/app/src/main/res/layout/dialog_key.xml b/app/src/main/res/layout/dialog_key.xml
new file mode 100644
index 0000000..c2a0ed6
--- /dev/null
+++ b/app/src/main/res/layout/dialog_key.xml
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="@dimen/space_m">
+
+    <TextView
+        android:id="@+id/keyText"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="@dimen/space_m"
+        android:background="@drawable/bg_input"
+        android:padding="12dp"
+        android:textAppearance="@style/TextAppearance.Rsend.Mono"
+        android:textIsSelectable="true" />
+
+    <Button
+        android:id="@+id/btnCopyKey"
+        style="@style/Widget.Rsend.Button.Secondary"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="@dimen/space_s"
+        android:text="Copy public key" />
+
+    <Button
+        android:id="@+id/btnGenKey"
+        style="@style/Widget.Rsend.Button.Secondary"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="@dimen/space_s"
+        android:text="Generate new key" />
+
+    <Button
+        android:id="@+id/btnImportKey"
+        style="@style/Widget.Rsend.Button.Secondary"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Import private key" />
+</LinearLayout>
diff --git a/app/src/main/res/layout/item_folder.xml b/app/src/main/res/layout/item_folder.xml
new file mode 100644
index 0000000..bb5a2bf
--- /dev/null
+++ b/app/src/main/res/layout/item_folder.xml
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    style="@style/Widget.Rsend.Card"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="horizontal"
+    android:gravity="center_vertical"
+    android:clickable="true"
+    android:focusable="true"
+    android:foreground="?attr/selectableItemBackground">
+
+    <ImageView
+        android:layout_width="24dp"
+        android:layout_height="24dp"
+        android:layout_marginEnd="@dimen/space_m"
+        android:src="@drawable/ic_folder"
+        android:contentDescription="@null" />
+
+    <LinearLayout
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/folderName"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:maxLines="1"
+            android:ellipsize="end"
+            android:textAppearance="@style/TextAppearance.Rsend.Title" />
+
+        <TextView
+            android:id="@+id/folderPath"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:maxLines="1"
+            android:ellipsize="end"
+            android:textAppearance="@style/TextAppearance.Rsend.Caption" />
+    </LinearLayout>
+
+    <TextView
+        android:id="@+id/folderChip"
+        style="@style/Widget.Rsend.Chip"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/space_s" />
+</LinearLayout>
diff --git a/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
new file mode 100644
index 0000000..b3e26b4
--- /dev/null
+++ b/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
diff --git a/app/src/main/res/values-night/colors.xml b/app/src/main/res/values-night/colors.xml
new file mode 100644
index 0000000..e3d2e06
--- /dev/null
+++ b/app/src/main/res/values-night/colors.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Neutral / monochrome palette, dark mode. -->
+    <color name="background">#121315</color>
+    <color name="surface">#1C1D20</color>
+    <color name="surface_variant">#2A2B2F</color>
+    <color name="outline">#34363B</color>
+    <color name="text_primary">#ECECEE</color>
+    <color name="text_secondary">#A0A2A8</color>
+
+    <color name="accent">#AEB6C7</color>
+
+    <!-- Light fill + near-black text reads well on a dark surface. -->
+    <color name="button_primary_bg">#E6E7EA</color>
+    <color name="button_primary_text">#16171A</color>
+
+    <color name="bar">#1C1D20</color>
+</resources>
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
new file mode 100644
index 0000000..bfcdd4e
--- /dev/null
+++ b/app/src/main/res/values/colors.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Neutral / monochrome palette. Light mode; values-night overrides. -->
+    <color name="background">#F4F4F5</color>
+    <color name="surface">#FFFFFF</color>
+    <color name="surface_variant">#ECECEE</color>
+    <color name="outline">#DCDCE0</color>
+    <color name="text_primary">#17181A</color>
+    <color name="text_secondary">#6A6C70</color>
+
+    <!-- Single restrained accent: a quiet slate. Drives switches and focus. -->
+    <color name="accent">#3B4252</color>
+
+    <!-- Primary button flips so it always has contrast against the surface. -->
+    <color name="button_primary_bg">#23252B</color>
+    <color name="button_primary_text">#FFFFFF</color>
+
+    <!-- Action bar / status bar. -->
+    <color name="bar">#23252B</color>
+</resources>
diff --git a/app/src/main/res/values/dimens.xml b/app/src/main/res/values/dimens.xml
new file mode 100644
index 0000000..abcba37
--- /dev/null
+++ b/app/src/main/res/values/dimens.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <dimen name="space_s">8dp</dimen>
+    <dimen name="space_m">16dp</dimen>
+    <dimen name="space_l">24dp</dimen>
+
+    <dimen name="radius">14dp</dimen>
+    <dimen name="radius_pill">999dp</dimen>
+
+    <dimen name="card_padding">16dp</dimen>
+    <dimen name="row_min_height">56dp</dimen>
+    <dimen name="stroke">1dp</dimen>
+</resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
new file mode 100644
index 0000000..1f1e4bb
--- /dev/null
+++ b/app/src/main/res/values/strings.xml
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">rsend</string>
+</resources>
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
new file mode 100644
index 0000000..c31d4d8
--- /dev/null
+++ b/app/src/main/res/values/themes.xml
@@ -0,0 +1,103 @@
+<resources>
+
+    <style name="Theme.Rsend" parent="Theme.AppCompat.DayNight.NoActionBar">
+        <item name="colorPrimary">@color/bar</item>
+        <item name="colorPrimaryDark">@color/bar</item>
+        <item name="colorAccent">@color/accent</item>
+        <item name="colorControlActivated">@color/accent</item>
+        <item name="android:windowBackground">@color/background</item>
+        <item name="android:colorBackground">@color/background</item>
+        <item name="android:textColorPrimary">@color/text_primary</item>
+        <item name="android:textColorSecondary">@color/text_secondary</item>
+        <item name="android:textColorHint">@color/text_secondary</item>
+    </style>
+
+    <!-- Text -->
+    <style name="TextAppearance.Rsend.Title" parent="TextAppearance.AppCompat">
+        <item name="android:textColor">@color/text_primary</item>
+        <item name="android:textSize">17sp</item>
+        <item name="android:textStyle">bold</item>
+    </style>
+
+    <style name="TextAppearance.Rsend.SectionHeader" parent="TextAppearance.AppCompat">
+        <item name="android:textColor">@color/text_secondary</item>
+        <item name="android:textSize">12sp</item>
+        <item name="android:textStyle">bold</item>
+        <item name="android:textAllCaps">true</item>
+        <item name="android:letterSpacing">0.08</item>
+    </style>
+
+    <style name="TextAppearance.Rsend.Body" parent="TextAppearance.AppCompat">
+        <item name="android:textColor">@color/text_primary</item>
+        <item name="android:textSize">15sp</item>
+    </style>
+
+    <style name="TextAppearance.Rsend.Caption" parent="TextAppearance.AppCompat">
+        <item name="android:textColor">@color/text_secondary</item>
+        <item name="android:textSize">13sp</item>
+    </style>
+
+    <style name="TextAppearance.Rsend.Mono" parent="TextAppearance.AppCompat">
+        <item name="android:textColor">@color/text_primary</item>
+        <item name="android:fontFamily">monospace</item>
+        <item name="android:textSize">12sp</item>
+    </style>
+
+    <!-- Containers -->
+    <style name="Widget.Rsend.Card" parent="">
+        <item name="android:background">@drawable/bg_card</item>
+        <item name="android:padding">@dimen/card_padding</item>
+        <item name="android:layout_marginBottom">@dimen/space_m</item>
+    </style>
+
+    <style name="Widget.Rsend.Row" parent="">
+        <item name="android:orientation">horizontal</item>
+        <item name="android:gravity">center_vertical</item>
+        <item name="android:minHeight">@dimen/row_min_height</item>
+        <item name="android:background">?attr/selectableItemBackground</item>
+        <item name="android:paddingTop">@dimen/space_s</item>
+        <item name="android:paddingBottom">@dimen/space_s</item>
+    </style>
+
+    <!-- Buttons -->
+    <style name="Widget.Rsend.Button.Primary" parent="Widget.AppCompat.Button">
+        <item name="android:background">@drawable/bg_button_primary</item>
+        <item name="android:textColor">@color/button_primary_text</item>
+        <item name="android:textAllCaps">false</item>
+        <item name="android:textStyle">bold</item>
+        <item name="android:textSize">15sp</item>
+        <item name="android:minHeight">52dp</item>
+        <item name="android:stateListAnimator">@null</item>
+    </style>
+
+    <style name="Widget.Rsend.Button.Secondary" parent="Widget.AppCompat.Button">
+        <item name="android:background">@drawable/bg_button_secondary</item>
+        <item name="android:textColor">@color/text_primary</item>
+        <item name="android:textAllCaps">false</item>
+        <item name="android:textSize">15sp</item>
+        <item name="android:minHeight">48dp</item>
+        <item name="android:stateListAnimator">@null</item>
+    </style>
+
+    <!-- Inputs -->
+    <style name="Widget.Rsend.EditText" parent="Widget.AppCompat.EditText">
+        <item name="android:background">@drawable/bg_input</item>
+        <item name="android:textColor">@color/text_primary</item>
+        <item name="android:textColorHint">@color/text_secondary</item>
+        <item name="android:padding">12dp</item>
+        <item name="android:textSize">15sp</item>
+    </style>
+
+    <!-- Chip (per-folder add/mirror tag) -->
+    <style name="Widget.Rsend.Chip" parent="">
+        <item name="android:background">@drawable/bg_chip</item>
+        <item name="android:textColor">@color/text_secondary</item>
+        <item name="android:textSize">11sp</item>
+        <item name="android:textAllCaps">true</item>
+        <item name="android:paddingLeft">10dp</item>
+        <item name="android:paddingRight">10dp</item>
+        <item name="android:paddingTop">3dp</item>
+        <item name="android:paddingBottom">3dp</item>
+    </style>
+
+</resources>
-- 
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