chore: rewrite into pages

Author: bramstroker

README.md

@@ -9,13 +9,9 @@
 
 ## ⚡ Turn any device into an energy monitor, no smart plug required
 
-**PowerCalc** brings energy monitoring to devices that normally *don’t support it*.
+**PowerCalc** estimates energy consumption for devices that can't measure it themselves, like lights, fans and media players, with no extra hardware. Instead of measuring power directly, it **accurately estimates consumption** using smart models based on real measurements, all inside Home Assistant.
 
-- Lights, fans, media devices, and more
-- No extra hardware needed
-- Works seamlessly inside Home Assistant
-
-Instead of measuring power directly, PowerCalc **accurately estimates consumption** using smart models based on real measurements.
+On top of power and energy sensors, PowerCalc also creates **cost sensors** to track spending, **utility meters** to break usage down by day, week or month, and **group sensors** to combine devices, rooms or your whole home into a single total.
 
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docs/source/index.md

@@ -1,6 +1,8 @@
 # About Powercalc
 
-**Powercalc** is a custom component for Home Assistant to estimate the power consumption (as virtual meters) of lights, fans, smart speakers and other devices, which don't have a built-in power meter. The consumption of light entities is calculated using different strategies to estimate the power usage by looking at brightness, hue/saturation and color temperature. For other entities a generic calculation can be applied, based on the attributes relevant for that entity.
+**Powercalc** is a custom component for Home Assistant that estimates the power consumption of lights, fans, smart speakers and other devices without a built-in power meter, using virtual sensors. Light usage is calculated with different strategies based on brightness, hue/saturation and color temperature, while other devices use a generic calculation based on their relevant attributes.
+
+On top of power and energy sensors, Powercalc also creates cost sensors to track spending, utility meters to break usage down by day, week or month, and group sensors to combine devices, rooms or your whole home into a single total.
 
 Follow [Quick start](quick-start.md) for the initial installation / setup