diff --git a/.gitignore b/.gitignore
index f3e4e31..d0f811a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 gpx_files/*
 !gpx_files/.keep
+fit_files/*
+!fit_files/.keep
diff --git a/fit_app.py b/fit_app.py
new file mode 100644
index 0000000..d5526b3
--- /dev/null
+++ b/fit_app.py
@@ -0,0 +1,827 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Thu Jul 30th 2025
+
+@author: Marcel Weschke
+@email: marcel.weschke@directbox.de
+"""
+# %% Load libraries
+import os
+import base64
+import io
+import datetime
+from math import radians, sin, cos, sqrt, asin
+
+import dash
+from dash import dcc, html, Input, Output, Dash
+import dash_bootstrap_components as dbc
+
+import pandas as pd
+import numpy as np
+import plotly.express as px
+import plotly.graph_objects as go
+from scipy.interpolate import interp1d
+import gpxpy
+from fitparse import FitFile
+
+# === Helper Functions ===
+def list_fit_files():
+    folder = './fit_files'  # Ordnerpfad anpassen
+    if not os.path.exists(folder):
+        os.makedirs(folder)
+
+    files = [f for f in os.listdir(folder) if f.lower().endswith('.fit')]
+
+    # Datum extrahieren für Sortierung
+    def extract_date(filename):
+        try:
+            return datetime.datetime.strptime(filename[:10], '%d.%m.%Y')  # Format DD.MM.YYYY
+        except ValueError:
+            try:
+                return datetime.datetime.strptime(filename[:10], '%Y-%m-%d')  # Format YYYY-MM-DD
+            except ValueError:
+                return datetime.datetime.min  # Ungültige -> ans Ende
+
+    files.sort(key=extract_date, reverse=True)
+
+    # Dropdown-Einträge bauen
+    if files:
+        return [{'label': f, 'value': os.path.join(folder, f)} for f in files]
+    else:
+        # Dummy-Eintrag, damit es nie crasht
+        return [{
+            'label': 'Keine FIT-Datei gefunden',
+            'value': 'NO_FILE'
+        }]
+
+def haversine(lon1, lat1, lon2, lat2):
+    R = 6371
+    dlon = radians(lon2 - lon1)
+    dlat = radians(lat2 - lat1)
+    a = sin(dlat/2)**2 + cos(radians(lat1)) * cos(radians(lat2)) * sin(dlon/2)**2
+    return 2 * R * asin(sqrt(a))
+
+def process_fit(file_path):
+    fit_file = FitFile(file_path)
+
+    # Sammle alle record-Daten
+    records = []
+    for record in fit_file.get_messages("record"):
+        record_data = {}
+        for data in record:
+            # Sammle alle verfügbaren Datenfelder
+            record_data[data.name] = data.value
+        records.append(record_data)
+
+    # Erstelle DataFrame
+    df = pd.DataFrame(records)
+
+    # Debugging: Schaue welche Spalten verfügbar sind
+    print(f"Verfügbare Spalten: {df.columns.tolist()}")
+
+    # Suche nach Heart Rate in verschiedenen Formaten
+    possible_hr_cols = [col for col in df.columns if 'heart' in col.lower() or 'hr' in col.lower()]
+    print(f"Mögliche Heart Rate Spalten: {possible_hr_cols}")
+
+    # Standard-Spaltennamen für verschiedene FIT-Formate
+    lat_cols = ['position_lat', 'lat', 'latitude']
+    lon_cols = ['position_long', 'lon', 'longitude']
+    elev_cols = ['altitude', 'elev', 'elevation', 'enhanced_altitude']
+    time_cols = ['timestamp', 'time']
+    hr_cols = ['heart_rate', 'hr'] + possible_hr_cols
+    speed_cols = ['speed', 'enhanced_speed']
+    dist_cols = ['distance', 'total_distance']
+
+    # Finde die richtigen Spaltennamen
+    lat_col = next((col for col in lat_cols if col in df.columns), None)
+    lon_col = next((col for col in lon_cols if col in df.columns), None)
+    elev_col = next((col for col in elev_cols if col in df.columns), None)
+    time_col = next((col for col in time_cols if col in df.columns), None)
+    hr_col = next((col for col in hr_cols if col in df.columns), None)
+    speed_col = next((col for col in speed_cols if col in df.columns), None)
+
+    # Prüfe ob wichtige Daten vorhanden sind
+    if not lat_col or not lon_col or not time_col:
+        raise ValueError(f"Wichtige Daten fehlen! Lat: {lat_col}, Lon: {lon_col}, Time: {time_col}")
+
+    # Benenne Spalten einheitlich um
+    df = df.rename(columns={
+        lat_col: 'lat',
+        lon_col: 'lon',
+        elev_col: 'elev' if elev_col else None,
+        time_col: 'time',
+        hr_col: 'heart_rate' if hr_col else None,
+        speed_col: 'speed_ms' if speed_col else None
+    })
+
+    # FIT lat/lon sind oft in semicircles - konvertiere zu Grad
+    if df['lat'].max() > 180:  # Semicircles detection
+        df['lat'] = df['lat'] * (180 / 2**31)
+        df['lon'] = df['lon'] * (180 / 2**31)
+
+    # Entferne Zeilen ohne GPS-Daten
+    df = df.dropna(subset=['lat', 'lon', 'time']).reset_index(drop=True)
+
+    # Basic cleanup
+    df['time'] = pd.to_datetime(df['time'])
+    df['time_loc'] = df['time'].dt.tz_localize(None)
+    df['time_diff'] = df['time'] - df['time'].iloc[0]
+    df['time_diff_sec'] = df['time_diff'].dt.total_seconds()
+    df['duration_hms'] = df['time_diff'].apply(lambda td: str(td).split('.')[0])
+
+    # Cumulative distance (km)
+    distances = [0]
+    for i in range(1, len(df)):
+        d = haversine(df.loc[i-1, 'lon'], df.loc[i-1, 'lat'], df.loc[i, 'lon'], df.loc[i, 'lat'])
+        distances.append(distances[-1] + d)
+    df['cum_dist_km'] = distances
+
+    # Elevation handling
+    if 'elev' in df.columns:
+        df['elev'] = df['elev'].bfill()
+        df['delta_elev'] = df['elev'].diff().fillna(0)
+        df['rel_elev'] = df['elev'] - df['elev'].iloc[0]
+    else:
+        # Fallback wenn keine Elevation vorhanden
+        df['elev'] = 0
+        df['delta_elev'] = 0
+        df['rel_elev'] = 0
+
+    # Speed calculation
+    if 'speed_ms' in df.columns:
+        # Konvertiere m/s zu km/h
+        df['speed_kmh'] = df['speed_ms'] * 3.6
+    else:
+        # Fallback: Berechne Speed aus GPS-Daten
+        df['delta_t'] = df['time'].diff().dt.total_seconds()
+        df['delta_d'] = df['cum_dist_km'].diff()
+        df['speed_kmh'] = (df['delta_d'] / df['delta_t']) * 3600
+        df['speed_kmh'] = df['speed_kmh'].replace([np.inf, -np.inf], np.nan)
+
+    # Velocity (used in pace calculations)
+    df['vel_kmps'] = np.gradient(df['cum_dist_km'], df['time_diff_sec'])
+
+    # Smoothed speed (Gaussian rolling)
+    df['speed_kmh_smooth'] = df['speed_kmh'].rolling(window=10, win_type="gaussian", center=True).mean(std=2)
+
+
+
+
+
+
+    # Heart rate handling (NEU!)
+    # ##############
+    # UPDATE: Da NaN-Problem mit heart_rate, manuell nochmal neu einlesen und überschreiben:
+    # save heart rate data into variable
+    heart_rate = []
+    for record in fit_file.get_messages("record"):
+        # Records can contain multiple pieces of data (ex: timestamp, latitude, longitude, etc)
+        for data in record:
+            # Print the name and value of the data (and the units if it has any)
+            if data.name == 'heart_rate':
+                heart_rate.append(data.value)
+    # hier variable neu überschrieben:
+    df['heart_rate'] = heart_rate[:len(df)]
+    # ##############
+
+    # MY DEBUG:
+    #print(heart_rate)
+    if 'heart_rate' in df.columns:
+        df['heart_rate'] = pd.to_numeric(df['heart_rate'], errors='coerce')
+        df['hr_smooth'] = df['heart_rate'].rolling(window=5, center=True).mean()
+        print(f"Heart rate range: {df['heart_rate'].min():.0f} - {df['heart_rate'].max():.0f} bpm")
+    else:
+        print("Keine Heart Rate Daten gefunden!")
+        df['heart_rate'] = np.nan
+        df['hr_smooth'] = np.nan
+
+        print(f"Verarbeitete FIT-Datei: {len(df)} Datenpunkte")
+        print(f"Distanz: {df['cum_dist_km'].iloc[-1]:.2f} km")
+        print(f"Dauer: {df['duration_hms'].iloc[-1]}")
+
+    return df
+
+
+# =============================================================================
+# INFO BANNER
+# =============================================================================
+def create_info_banner(df):
+    # Total distance in km
+    total_distance_km = df['cum_dist_km'].iloc[-1]
+
+    # Total time as timedelta
+    total_seconds = df['time_diff_sec'].iloc[-1]
+    hours, remainder = divmod(int(total_seconds), 3600)
+    minutes, seconds = divmod(remainder, 60)
+    formatted_total_time = f"{hours:02d}:{minutes:02d}:{seconds:02d}"
+
+    # Average pace (min/km)
+    if total_distance_km > 0:
+        pace_sec_per_km = total_seconds / total_distance_km
+        pace_min = int(pace_sec_per_km // 60)
+        pace_sec = int(pace_sec_per_km % 60)
+        formatted_pace = f"{pace_min}:{pace_sec:02d} min/km"
+    else:
+        formatted_pace = "N/A"
+
+    # Build the info banner layout
+    info_banner = html.Div([
+        html.Div([
+            html.H4("Total Distance", style={'margin-bottom': '5px'}),
+            html.H2(f"{total_distance_km:.2f} km")
+        ], style={'width': '30%', 'display': 'inline-block', 'textAlign': 'center'}),
+
+        html.Div([
+            html.H4("Total Time", style={'margin-bottom': '5px'}),
+            html.H2(formatted_total_time)
+        ], style={'width': '30%', 'display': 'inline-block', 'textAlign': 'center'}),
+
+        html.Div([
+            html.H4("Average Pace", style={'margin-bottom': '5px'}),
+            html.H2(formatted_pace)
+        ], style={'width': '30%', 'display': 'inline-block', 'textAlign': 'center'}),
+    ], style={
+        'display': 'flex',
+        'justifyContent': 'space-around',
+        'backgroundColor': '#1e1e1e',
+        'color': 'white',
+        'padding': '20px',
+        'marginBottom': '5px',
+        'borderRadius': '10px',
+        'width': '100%',
+        #'maxWidth': '1200px',
+        'margin': 'auto'
+    })
+
+    return info_banner
+  
+
+# =============================================================================
+# START OF THE PLOTS
+# =============================================================================
+def create_map_plot(df):
+    # fig = px.line_map(
+    #     df,
+    #     lat='lat',
+    #     lon='lon',
+    #     hover_name='time',
+    #     hover_data={
+    #         'cum_dist_km': ':.2f',
+    #         'duration_hms': True,
+    #         'lat': False,
+    #         'lon': False,
+    #         'time': False
+    #     },
+    #     labels={
+    #         'cum_dist_km': 'Distance (km) ',
+    #         'duration_hms': 'Elapsed Time '
+    #     },
+    #     zoom=13,
+    #     height=800
+    # )
+    fig = px.line_map(
+    df,
+    lat='lat',
+    lon='lon',
+    zoom=13,
+    height=800
+    )
+    
+    fig.update_traces(
+        hovertemplate=(
+            #"Time: %{customdata[0]}<br>" +
+            "Distance (Km): %{customdata[0]:.2f}<br>" +
+            "Speed (Km/h): %{customdata[1]:.2f}<br>" +
+            "Heart Rate (bpm): %{customdata[2]}<br>" +
+            "Elapsed Time: %{customdata[3]}<extra></extra>"
+        ),
+        #customdata=df[['time', 'cum_dist_km', 'duration_hms']]
+        customdata=df[['cum_dist_km', 'speed_kmh', 'heart_rate', 'duration_hms']]
+    )
+    # Define map style and the line ontop
+    fig.update_layout(map_style="open-street-map")
+    # The built-in plotly.js styles are: carto-darkmatter, carto-positron, open-street-map, stamen-terrain, stamen-toner, stamen-watercolor, white-bg
+    # The built-in Mapbox styles are: basic, streets, outdoors, light, dark, satellite, satellite-streets
+    fig.update_traces(line=dict(color="#f54269", width=3))
+
+    # Start / Stop marker
+    start = df.iloc[0]
+    end = df.iloc[-1]
+    fig.add_trace(go.Scattermap(
+        lat=[start['lat']], lon=[start['lon']], mode='markers+text',
+        marker=dict(size=12, color='#fca062'), text=['Start'], name='Start', textposition='bottom left'
+    ))
+    fig.add_trace(go.Scattermap(
+        lat=[end['lat']], lon=[end['lon']], mode='markers+text',
+        marker=dict(size=12, color='#b9fc62'), text=['Stop'], name='Stop', textposition='bottom left'
+    ))
+    fig.update_layout(paper_bgcolor='#1e1e1e', font=dict(color='white'))
+    fig.update_layout(
+    legend=dict(
+        orientation='h',         # horizontal layout
+        yanchor='top',
+        y=-0.01,                  # move legend below the map
+        xanchor='center',
+        x=0.5,
+        font=dict(color='white')
+    )
+)
+    return fig
+
+
+
+
+######################
+# NEUE VERSION:
+def create_elevation_plot(df, smooth_points=500):
+    # Originale Daten
+    x = df['time']
+    y = df['rel_elev']
+
+    # Einfache Glättung: nur Y-Werte glätten, X-Werte beibehalten
+    if len(y) >= 4:  # Genug Punkte für cubic interpolation
+        y_numeric = y.to_numpy()
+
+        # Nur gültige Y-Punkte für Interpolation
+        mask = ~np.isnan(y_numeric)
+
+        if np.sum(mask) >= 4:  # Genug gültige Punkte
+            # Index-basierte Interpolation für Y-Werte
+            valid_indices = np.where(mask)[0]
+            valid_y = y_numeric[mask]
+
+            # Interpolation über die Indizes
+            f = interp1d(valid_indices, valid_y, kind='cubic',
+                        bounds_error=False, fill_value='extrapolate')
+
+            # Neue Y-Werte für alle ursprünglichen X-Positionen
+            all_indices = np.arange(len(y))
+            y_smooth = f(all_indices)
+
+            # Originale X-Werte beibehalten
+            x_smooth = x
+        else:
+            # Fallback: originale Daten
+            x_smooth, y_smooth = x, y
+    else:
+        # Zu wenige Punkte: originale Daten verwenden
+        x_smooth, y_smooth = x, y
+
+    fig = go.Figure()
+
+    # Fläche unter der Kurve (mit geglätteten Daten)
+    fig.add_trace(go.Scatter(
+        x=x_smooth, y=y_smooth,
+        mode='lines',
+        line=dict(color='#1CAF50'),      # Fill between color!
+        fill='tozeroy',
+        #fillcolor='rgba(226, 241, 248)',
+        hoverinfo='skip',
+        showlegend=False
+    ))
+
+    # Hauptlinie (geglättet)
+    fig.add_trace(go.Scatter(
+        x=x_smooth, y=y_smooth,
+        mode='lines',
+        line=dict(color='#084C20', width=2), # Line color!
+        name='Elevation',
+        showlegend=False
+    ))
+
+    # SUPDER IDEE, ABER GEHT NICHT WEGE NEUEN smoothed POINTS! GEHT NUR BEI X
+    #fig.update_traces(
+    #    hovertemplate=(
+    #        #"Time: %{customdata[0]}<br>" +
+    #        "Distance (km): %{customdata[0]:.2f}<br>" +
+    #        "Elevation: %{customdata[1]}<extra></extra>" +
+    #        "Elapsed Time: %{customdata[2]}<extra></extra>"
+    #    ),
+    #    customdata=df[['cum_dist_km','elev', 'time']]
+    #
+
+    # Layout im Dark Theme
+    fig.update_layout(
+        title=dict(text='Höhenprofil relativ zum Startwert', font=dict(size=16, color='white')),
+        xaxis_title='Zeit',
+        yaxis_title='Höhe relativ zum Start (m)',
+        template='plotly_dark',
+        paper_bgcolor='#1e1e1e',
+        plot_bgcolor='#111111',
+        font=dict(color='white'),
+        margin=dict(l=40, r=40, t=50, b=40),
+        height=400
+    )
+
+    return fig
+
+
+
+def create_deviation_plot(df):  #Distanz-Zeit-Diagramm
+    # Compute mean velocity in km/s
+    vel_kmps_mean = df['cum_dist_km'].iloc[-1] / df['time_diff_sec'].iloc[-1]
+    # Expected cumulative distance assuming constant mean velocity
+    df['cum_dist_km_qmean'] = df['time_diff_sec'] * vel_kmps_mean
+    # Deviation from mean velocity distance
+    df['del_dist_km_qmean'] = df['cum_dist_km'] - df['cum_dist_km_qmean']
+    # Plot the deviation
+    fig = px.line(
+        df,
+        x='time_loc',
+        y='del_dist_km_qmean',
+        labels={
+            'time_loc': 'Zeit',
+            'del_dist_km_qmean': 'Δ Strecke (km)'
+        },
+        template='plotly_dark',
+    )
+    fig.update_layout(
+        title=dict(text='Abweichung von integriertem Durchschnittstempo', font=dict(size=16)),
+        yaxis_title='Abweichung (km)',
+        xaxis_title='Zeit',
+        height=400,
+        paper_bgcolor='#1e1e1e',
+        plot_bgcolor='#111111',
+        font=dict(color='white', size=14),
+        margin=dict(l=40, r=40, t=50, b=40)
+    )
+    # Add horizontal reference line at y=0
+    fig.add_shape(
+        type='line',
+        x0=df['time_loc'].iloc[0],
+        x1=df['time_loc'].iloc[-1],
+        y0=0,
+        y1=0,
+        line=dict(color='gray', width=1, dash='dash'),
+        name='Durchschnittstempo'
+    )
+    return fig
+
+
+def create_speed_plot(df):
+    mask = df['speed_kmh_smooth'].isna()
+    mean_speed_kmh = df['speed_kmh'].mean()
+    fig = go.Figure()
+    fig.add_trace(go.Scatter(
+        x=df['time'][~mask],
+        y=df['speed_kmh_smooth'][~mask],
+        mode='lines',
+        name='Geglättete Geschwindigkeit',
+        line=dict(color='royalblue')
+    ))
+    fig.update_layout(
+        title=dict(text=f'Tempo über die Zeit (geglättet) - Durchschnittstempo: {mean_speed_kmh:.2f} km/h', font=dict(size=16)),
+        xaxis=dict(title='Zeit', tickformat='%H:%M', type='date'),
+        yaxis=dict(title='Geschwindigkeit (km/h)', rangemode='tozero'),
+        template='plotly_dark',
+        paper_bgcolor='#1e1e1e',
+        plot_bgcolor='#111111',
+        font=dict(color='white'),
+        margin=dict(l=40, r=40, t=40, b=40)
+    )
+    # Add horizontal reference line at y=mean_speed_kmh
+    fig.add_shape(
+        type='line',
+        x0=df['time_loc'].iloc[0],
+        x1=df['time_loc'].iloc[-1],
+        y0=mean_speed_kmh,
+        y1=mean_speed_kmh,
+        line=dict(color='gray', width=1, dash='dash'),
+        name='Durchschnittstempo'
+    )
+    return fig
+
+
+
+
+
+
+
+# heart_rate Plot NEW !!!
+def create_heart_rate_plot(df):
+    # Maske für gültige Heart Rate Daten
+    mask = df['hr_smooth'].isna()
+
+    # Durchschnittliche Heart Rate berechnen (nur gültige Werte)
+    valid_hr = df['heart_rate'].dropna()
+    if len(valid_hr) > 0:
+        mean_hr = valid_hr.mean()
+        min_hr = valid_hr.min()
+        max_hr = valid_hr.max()
+    else:
+        mean_hr = 0
+        min_hr = 0
+        max_hr = 0
+
+    fig = go.Figure()
+
+    # Heart Rate Linie (geglättet)
+    fig.add_trace(go.Scatter(
+        x=df['time'][~mask],
+        y=df['hr_smooth'][~mask],
+        mode='lines',
+        #name='Geglättete Herzfrequenz',
+        line=dict(color='#E43D70', width=2),
+        hovertemplate=(
+            "Zeit: %{x}<br>" +
+            "Herzfrequenz: %{y:.0f} bpm<br>" +
+            "<extra></extra>"
+        )
+    ))
+
+    # Optional: Raw Heart Rate als dünnere, transparente Linie
+    if not df['heart_rate'].isna().all():
+        fig.add_trace(go.Scatter(
+            x=df['time'],
+            y=df['heart_rate'],
+            mode='lines',
+            name='Raw Herzfrequenz',
+            line=dict(color='#E43D70', width=1, dash='dot'),
+            opacity=0.3,
+            showlegend=False,
+            hoverinfo='skip'
+        ))
+
+    # Durchschnittslinie
+    if mean_hr > 0:
+        fig.add_shape(
+            type='line',
+            x0=df['time_loc'].iloc[0],
+            x1=df['time_loc'].iloc[-1],
+            y0=mean_hr,
+            y1=mean_hr,
+            line=dict(color='gray', width=1, dash='dash'),
+        )
+
+        # Annotation für Durchschnittswert
+        fig.add_annotation(
+            x=df['time_loc'].iloc[int(len(df) * 0.8)],  # Bei 80% der Zeit
+            y=mean_hr,
+            text=f"Ø {mean_hr:.0f} bpm",
+            showarrow=True,
+            arrowhead=2,
+            arrowcolor="gray",
+            bgcolor="rgba(128,128,128,0.1)",
+            bordercolor="gray",
+            font=dict(color="white", size=10)
+        )
+
+    # Heart Rate Zonen (optional)
+    if mean_hr > 0:
+        # Geschätzte maximale Herzfrequenz (220 - Alter, hier als Beispiel 190)
+        max_hr_estimated = 190  # Du kannst das anpassen
+
+        # Zone 1: Sehr leicht (50-60% HRmax)
+        zone1_lower = max_hr_estimated * 0.5
+        zone1_upper = max_hr_estimated * 0.6
+
+        # Zone 2: Leicht (60-70% HRmax)
+        zone2_upper = max_hr_estimated * 0.7
+
+        # Zone 3: Moderat (70-80% HRmax)
+        zone3_upper = max_hr_estimated * 0.8
+
+        # Zone 4: Hart (80-90% HRmax) #update: bis 100%
+        zone4_upper = max_hr_estimated * 1.0
+
+        # Füge Zonen-Bereiche als Hintergrundbereiche hinzu
+        fig.add_hrect(y0=zone1_lower, y1=zone1_upper,
+                     fillcolor="green", opacity=0.1, line_width=0)
+        fig.add_hrect(y0=zone1_upper, y1=zone2_upper,
+                     fillcolor="yellow", opacity=0.1, line_width=0)
+        fig.add_hrect(y0=zone2_upper, y1=zone3_upper,
+                     fillcolor="orange", opacity=0.1, line_width=0)
+        fig.add_hrect(y0=zone3_upper, y1=zone4_upper,
+                     fillcolor="red", opacity=0.1, line_width=0)
+
+    # Layout
+    title_text = f'Herzfrequenz über die Zeit (geglättete)'
+    if mean_hr > 0:
+        title_text += f' - Ø {mean_hr:.0f} bpm (Range: {min_hr:.0f}-{max_hr:.0f})'
+
+    fig.update_layout(
+        title=dict(text=title_text, font=dict(size=16, color='white')),
+        xaxis=dict(
+            title='Zeit',
+            tickformat='%H:%M',
+            type='date'
+        ),
+        yaxis=dict(
+            title='Herzfrequenz (bpm)',
+            rangemode='tozero'
+        ),
+        template='plotly_dark',
+        paper_bgcolor='#1e1e1e',
+        plot_bgcolor='#111111',
+        font=dict(color='white'),
+        margin=dict(l=40, r=40, t=50, b=40),
+        height=400
+    )
+
+    return fig
+
+
+
+
+
+
+
+
+
+
+
+def create_pace_bars_plot(df):
+    # Ensure time column is datetime
+    if not pd.api.types.is_datetime64_any_dtype(df['time']):
+        df['time'] = pd.to_datetime(df['time'], errors='coerce')
+
+    # Assign km segments
+    df['km'] = df['cum_dist_km'].astype(int)
+
+    # Time in seconds from start
+    df['time_sec'] = (df['time'] - df['time'].iloc[0]).dt.total_seconds()
+
+    # Step 3: Compute pace manually per km group
+    df['km_start'] = np.nan
+    df['segment_len'] = np.nan
+    df['pace_min_per_km'] = np.nan
+
+    for km_val, group in df.groupby('km'):
+        dist_start = group['cum_dist_km'].iloc[0]
+        dist_end = group['cum_dist_km'].iloc[-1]
+        segment_len = dist_end - dist_start
+
+        time_start = group['time_sec'].iloc[0]
+        time_end = group['time_sec'].iloc[-1]
+        elapsed_time_sec = time_end - time_start
+
+        if segment_len > 0:
+            pace_min_per_km = (elapsed_time_sec / 60) / segment_len
+        else:
+            pace_min_per_km = np.nan
+
+        df.loc[group.index, 'km_start'] = km_val
+        df.loc[group.index, 'segment_len'] = segment_len
+        df.loc[group.index, 'pace_min_per_km'] = pace_min_per_km
+
+    # Clean types
+    df['km_start'] = df['km_start'].astype(int)
+    df['segment_len'] = df['segment_len'].astype(float)
+    df['pace_min_per_km'] = pd.to_numeric(df['pace_min_per_km'], errors='coerce')
+
+    # Step 4: Create Plotly bar chart
+    fig = go.Figure()
+    fig.add_trace(go.Bar(
+        x=df['km_start'],
+        y=df['pace_min_per_km'],
+        width=df['segment_len'],
+        text=[f"{v:.1f} min/km" if pd.notnull(v) else "" for v in df['pace_min_per_km']],
+        textposition='outside',
+        marker_color='dodgerblue',
+        name='Pace pro km',
+        offset=0
+    ))
+
+
+
+
+    # #########
+    # Add horizontal reference line - X-Werte für gesamte Breite
+    # Calculate average pace
+    total_distance_km = df['cum_dist_km'].iloc[-1]
+    total_seconds = df['time_diff_sec'].iloc[-1]
+
+    # Average pace (min/km) - KORRIGIERT
+    if total_distance_km > 0:
+        pace_sec_per_km = total_seconds / total_distance_km
+        pace_min_per_km = pace_sec_per_km / 60  # Konvertiere zu Minuten pro km
+    else:
+        pace_min_per_km = 0
+
+    fig.add_shape(
+        type='line',
+        x0=0,  # Start bei 0
+        x1=total_distance_km,  # Ende bei maximaler Distanz
+        y0=pace_min_per_km,
+        y1=pace_min_per_km,
+        line=dict(color='gray', width=1, dash='dash'),
+    )
+
+    ## Optional: Text-Annotation für die durchschnittliche Pace
+    #fig.add_annotation(
+    #    x=total_distance_km * 0.8,  # Position bei 80% der Distanz
+    #    y=pace_min_per_km,
+    #    text=f"Ø {pace_min_per_km:.1f} min/km",
+    #    showarrow=True,
+    #    arrowhead=2,
+    #    arrowcolor="gray",
+    #    bgcolor="rgba(255,0,0,0.1)",
+    #    bordercolor="gray",
+    #    font=dict(color="white")
+    #)
+
+
+
+
+    fig.update_layout(
+        title=dict(text='Tempo (min/km) je Kilometer', font=dict(size=16)),
+        xaxis_title='Distanz (km)',
+        yaxis_title='Minuten pro km',
+        barmode='overlay',
+        bargap=0,
+        bargroupgap=0,
+        xaxis=dict(
+            type='linear',
+            range=[0, df['cum_dist_km'].iloc[-1]],
+            tickmode='linear',
+            dtick=1,
+            showgrid=True
+        ),
+        template='plotly_dark',
+        height=400,
+        margin=dict(l=40, r=40, t=30, b=40),
+        plot_bgcolor='#111111',
+        paper_bgcolor='#1e1e1e',
+        font=dict(color='white')
+    )
+    return fig
+
+
+
+
+
+# === App Setup ===
+app = dash.Dash(__name__, external_stylesheets=[dbc.themes.SLATE])
+app.title = "FIT Dashboard"
+
+app.layout = html.Div([
+    html.H1("Running Dashboard", style={'textAlign': 'center'}),
+    dcc.Store(id='stored-df'),
+
+    html.Div([
+        html.Label("FIT-Datei wählen:", style={'color': 'white'}),
+        dcc.Dropdown(
+            id='fit-file-dropdown',
+            options=list_fit_files(),
+            value=list_fit_files()[0]['value'],  # immer gültig
+            clearable=False,
+            style={'width': '300px', 'color': 'black'}
+        )
+    ], style={'padding': '20px', 'backgroundColor': '#1e1e1e'}),
+
+    html.Div(id='info-banner'),
+    dcc.Graph(id='fig-map'),
+    dcc.Graph(id='fig-elevation'),
+    dcc.Graph(id='fig_deviation'),
+    dcc.Graph(id='fig_speed'),
+    dcc.Graph(id='fig_hr'),
+    dcc.Graph(id='fig_pace_bars')
+])
+
+
+# === Callbacks ===
+# Callback 1: Load GPX File and Store as JSON
+@app.callback(
+    Output('stored-df', 'data'),
+    Input('fit-file-dropdown', 'value')
+)
+def load_fit_data(path):
+    df = process_fit(path)
+    return df.to_json(date_format='iso', orient='split')
+
+# Callback 2: Update All Plots
+@app.callback(
+    Output('info-banner', 'children'),
+    Output('fig-map', 'figure'),
+    Output('fig-elevation', 'figure'),
+    Output('fig_deviation', 'figure'),
+    Output('fig_speed', 'figure'),
+    Output('fig_hr', 'figure'),
+    Output('fig_pace_bars', 'figure'),
+    Input('stored-df', 'data')
+)
+def update_all_plots(json_data):
+    df = pd.read_json(io.StringIO(json_data), orient='split')
+
+    info = create_info_banner(df)
+    fig_map = create_map_plot(df)
+    fig_elev = create_elevation_plot(df)
+    fig_dev = create_deviation_plot(df)
+    fig_speed = create_speed_plot(df)
+    fig_hr = create_heart_rate_plot(df)
+    fig_pace = create_pace_bars_plot(df)
+
+    return info, fig_map, fig_elev, fig_dev, fig_speed, fig_hr, fig_pace
+
+
+# === Run Server ===
+if __name__ == '__main__':
+    app.run(debug=True, port=8051)
+
+    
+# NOTE:
+#    Zusammenhang zwischen Pace und Geschwindigkeit
+#     - Pace = Minuten pro Kilometer (z. B. 5:40/km)
+#     - Geschwindigkeit = Kilometer pro Stunde (z. B. 10.71 km/h)
+# 
diff --git a/fit_files/.keep b/fit_files/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/app.py b/gpx_app.py
similarity index 77%
rename from app.py
rename to gpx_app.py
index 9d6732f..7b5bd52 100644
--- a/app.py
+++ b/gpx_app.py
@@ -21,6 +21,7 @@ import pandas as pd
 import numpy as np
 import plotly.express as px
 import plotly.graph_objects as go
+from scipy.interpolate import interp1d
 import gpxpy
 
 
@@ -214,43 +215,82 @@ def create_map_plot(df):
     )
 )
     return fig
-  
-  
-def create_elevation_plot(df):
+
+
+
+
+######################
+# NEUE VERSION:
+def create_elevation_plot(df, smooth_points=500):
+    # Originale Daten
     x = df['time']
     y = df['rel_elev']
-    n_layers = 36
-    base_color = (5, 158, 5)  # Greenish
-    max_alpha = 0.25
-    traces = []
 
-    # Main elevation line
-    traces.append(go.Scatter(
-        x=x, y=y,
+    # Einfache Glättung: nur Y-Werte glätten, X-Werte beibehalten
+    if len(y) >= 4:  # Genug Punkte für cubic interpolation
+        y_numeric = y.to_numpy()
+
+        # Nur gültige Y-Punkte für Interpolation
+        mask = ~np.isnan(y_numeric)
+
+        if np.sum(mask) >= 4:  # Genug gültige Punkte
+            # Index-basierte Interpolation für Y-Werte
+            valid_indices = np.where(mask)[0]
+            valid_y = y_numeric[mask]
+
+            # Interpolation über die Indizes
+            f = interp1d(valid_indices, valid_y, kind='cubic',
+                        bounds_error=False, fill_value='extrapolate')
+
+            # Neue Y-Werte für alle ursprünglichen X-Positionen
+            all_indices = np.arange(len(y))
+            y_smooth = f(all_indices)
+
+            # Originale X-Werte beibehalten
+            x_smooth = x
+        else:
+            # Fallback: originale Daten
+            x_smooth, y_smooth = x, y
+    else:
+        # Zu wenige Punkte: originale Daten verwenden
+        x_smooth, y_smooth = x, y
+
+    fig = go.Figure()
+
+    # Fläche unter der Kurve (mit geglätteten Daten)
+    fig.add_trace(go.Scatter(
+        x=x_smooth, y=y_smooth,
         mode='lines',
-        line=dict(color='lime', width=2),
+        line=dict(color='#1CAF50'),      # Fill between color!
+        fill='tozeroy',
+        #fillcolor='rgba(226, 241, 248)',
+        hoverinfo='skip',
         showlegend=False
     ))
 
-    # Single gradient fill (above and below 0)
-    for i in range(1, n_layers + 1):
-        alpha = max_alpha * (1 - i / n_layers)
-        color = f'rgba({base_color[0]}, {base_color[1]}, {base_color[2]}, {alpha:.3f})'
-        y_layer = y * (i / n_layers)
-        traces.append(go.Scatter(
-            x=x,
-            y=y_layer,
-            mode='lines',
-            fill='tonexty',
-            line=dict(width=0),
-            fillcolor=color,
-            hoverinfo='skip',
-            showlegend=False
-        ))
+    # Hauptlinie (geglättet)
+    fig.add_trace(go.Scatter(
+        x=x_smooth, y=y_smooth,
+        mode='lines',
+        line=dict(color='#084C20', width=2), # Line color!
+        name='Elevation',
+        showlegend=False
+    ))
 
-    fig = go.Figure(data=traces)
+    # SUPDER IDEE, ABER GEHT NICHT WEGE NEUEN smoothed POINTS! GEHT NUR BEI X
+    #fig.update_traces(
+    #    hovertemplate=(
+    #        #"Time: %{customdata[0]}<br>" +
+    #        "Distance (km): %{customdata[0]:.2f}<br>" +
+    #        "Elevation: %{customdata[1]}<extra></extra>" +
+    #        "Elapsed Time: %{customdata[2]}<extra></extra>"
+    #    ),
+    #    customdata=df[['cum_dist_km','elev', 'time']]
+    #
+
+    # Layout im Dark Theme
     fig.update_layout(
-        title=dict(text='Höhenprofil relativ zum Startwert', font=dict(size=16)),
+        title=dict(text='Höhenprofil relativ zum Startwert', font=dict(size=16, color='white')),
         xaxis_title='Zeit',
         yaxis_title='Höhe relativ zum Start (m)',
         template='plotly_dark',
@@ -258,11 +298,13 @@ def create_elevation_plot(df):
         plot_bgcolor='#111111',
         font=dict(color='white'),
         margin=dict(l=40, r=40, t=50, b=40),
-        height=500
+        height=400
     )
+
     return fig
 
 
+
 def create_deviation_plot(df):  #Distanz-Zeit-Diagramm
     # Compute mean velocity in km/s
     vel_kmps_mean = df['cum_dist_km'].iloc[-1] / df['time_diff_sec'].iloc[-1]
@@ -282,7 +324,7 @@ def create_deviation_plot(df):  #Distanz-Zeit-Diagramm
         template='plotly_dark',
     )
     fig.update_layout(
-        title=dict(text='Abweichung von integrierter Durchschnittsgeschwindigkeit', font=dict(size=16)),
+        title=dict(text='Abweichung von integriertem Durchschnittstempo', font=dict(size=16)),
         yaxis_title='Abweichung (km)',
         xaxis_title='Zeit',
         height=400,
@@ -299,7 +341,7 @@ def create_deviation_plot(df):  #Distanz-Zeit-Diagramm
         y0=0,
         y1=0,
         line=dict(color='gray', width=1, dash='dash'),
-        name='Durchschnittsgeschwindigkeit'
+        name='Durchschnittstempo'
     )
     return fig
 
@@ -316,7 +358,7 @@ def create_speed_plot(df):
         line=dict(color='royalblue')
     ))
     fig.update_layout(
-        title=dict(text=f'Durchschnittsgeschwindigkeit über die Zeit (geglättet): {mean_speed_kmh:.2f} km/h', font=dict(size=16)),
+        title=dict(text=f'Tempo über die Zeit (geglättet) - Durchschnittstempo: {mean_speed_kmh:.2f} km/h', font=dict(size=16)),
         xaxis=dict(title='Zeit', tickformat='%H:%M', type='date'),
         yaxis=dict(title='Geschwindigkeit (km/h)', rangemode='tozero'),
         template='plotly_dark',
@@ -325,6 +367,16 @@ def create_speed_plot(df):
         font=dict(color='white'),
         margin=dict(l=40, r=40, t=40, b=40)
     )
+    # Add horizontal reference line at y=mean_speed_kmh
+    fig.add_shape(
+        type='line',
+        x0=df['time_loc'].iloc[0],
+        x1=df['time_loc'].iloc[-1],
+        y0=mean_speed_kmh,
+        y1=mean_speed_kmh,
+        line=dict(color='gray', width=1, dash='dash'),
+        name='Durchschnittstempo'
+    )
     return fig
 
 
@@ -381,8 +433,49 @@ def create_pace_bars_plot(df):
         offset=0
     ))
 
+
+
+
+    # #########
+    # Add horizontal reference line - X-Werte für gesamte Breite
+    # Calculate average pace
+    total_distance_km = df['cum_dist_km'].iloc[-1]
+    total_seconds = df['time_diff_sec'].iloc[-1]
+
+    # Average pace (min/km) - KORRIGIERT
+    if total_distance_km > 0:
+        pace_sec_per_km = total_seconds / total_distance_km
+        pace_min_per_km = pace_sec_per_km / 60  # Konvertiere zu Minuten pro km
+    else:
+        pace_min_per_km = 0
+
+    fig.add_shape(
+        type='line',
+        x0=0,  # Start bei 0
+        x1=total_distance_km,  # Ende bei maximaler Distanz
+        y0=pace_min_per_km,
+        y1=pace_min_per_km,
+        line=dict(color='gray', width=1, dash='dash'),
+    )
+
+    ## Optional: Text-Annotation für die durchschnittliche Pace
+    #fig.add_annotation(
+    #    x=total_distance_km * 0.8,  # Position bei 80% der Distanz
+    #    y=pace_min_per_km,
+    #    text=f"Ø {pace_min_per_km:.1f} min/km",
+    #    showarrow=True,
+    #    arrowhead=2,
+    #    arrowcolor="gray",
+    #    bgcolor="rgba(255,0,0,0.1)",
+    #    bordercolor="gray",
+    #    font=dict(color="white")
+    #)
+
+
+
+
     fig.update_layout(
-        title=dict(text='Pace (min/km) je Kilometer', font=dict(size=16)),
+        title=dict(text='Tempo (min/km) je Kilometer', font=dict(size=16)),
         xaxis_title='Distanz (km)',
         yaxis_title='Minuten pro km',
         barmode='overlay',
diff --git a/requirements.txt b/requirements.txt
index 2874af7..c8f38f5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,6 @@ dash-bootstrap-components
 plotly
 pandas
 numpy
+scipy
 gpxpy
+fitparse