commit 745c93c77b5a206f3e5fd3bd5d564323b77b68bd
Author: Kai <kai@localhost>
Date:   Mon Feb 16 11:22:50 2026 +0100

    Initial FarmCal MVP

diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..1fdfb6c
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,5 @@
+APP_PORT=8080
+
+# Beispiel fuer externe MariaDB im Netzwerk:
+# DB_DSN=farmcal:DEIN_PASSWORT@tcp(192.168.178.20:3306)/farmcal?parseTime=true
+DB_DSN=farmcal:CHANGE_ME@tcp(127.0.0.1:3306)/farmcal?parseTime=true
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..99db6b2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+.env
+bin/
+dist/
+*.exe
+*.out
+*.test
+*.log
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..c5142f3
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,26 @@
+FROM golang:1.23-alpine AS build
+WORKDIR /app
+
+COPY go.mod ./
+RUN go mod download
+
+COPY cmd ./cmd
+COPY templates ./templates
+COPY static ./static
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /farmcal ./cmd/server
+
+FROM alpine:3.21
+WORKDIR /app
+
+RUN adduser -D -H appuser
+USER appuser
+
+COPY --from=build /farmcal /app/farmcal
+COPY templates ./templates
+COPY static ./static
+
+EXPOSE 8080
+ENV APP_ADDR=:8080
+
+CMD ["/app/farmcal"]
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..644a1b0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,97 @@
+# FarmCal
+
+FarmCal ist eine schlanke Web-App zur Ingame-Planung fuer Farming Simulator:
+- Felder verwalten (Feldnummer + optionaler Name)
+- Aussaat- und Ernteplanung pro Feld
+- Ingame-Zeitmodell mit konfigurierbaren `Tagen pro Monat`
+- Tagesansicht mit konkreten Aufgaben (Aussaat/Ernte)
+
+Die App ist fuer Desktop und Smartphone ausgelegt (responsive UI) und nutzt MariaDB.
+
+## Tech-Stack
+
+- Backend: Go (net/http + html/template)
+- Datenbank: MariaDB (auch externe DB im Netzwerk)
+- Deployment: Docker (ein Container fuer die App)
+
+## Voraussetzungen
+
+- MariaDB erreichbar im Netzwerk
+- Datenbank und Benutzer vorhanden, z. B.:
+  - DB: `farmcal`
+  - User: `farmcal`
+  - Rechte auf `farmcal.*`
+
+## Konfiguration
+
+1. `.env.example` nach `.env` kopieren
+2. `DB_DSN` auf deine Netzwerk-MariaDB anpassen
+
+Beispiel:
+
+```env
+APP_PORT=8080
+DB_DSN=farmcal:SEHR_SICHERES_PASSWORT@tcp(192.168.1.40:3306)/farmcal?parseTime=true
+```
+
+## Start mit Docker Compose
+
+```bash
+docker compose --env-file .env up -d --build
+```
+
+Danach ist FarmCal unter `http://<host>:8080` erreichbar.
+
+## Als Image bauen und verteilen
+
+Image lokal bauen:
+
+```bash
+docker build -t farmcal:latest .
+```
+
+Tag fuer Registry:
+
+```bash
+docker tag farmcal:latest <deine-registry>/<dein-user>/farmcal:latest
+```
+
+Push:
+
+```bash
+docker push <deine-registry>/<dein-user>/farmcal:latest
+```
+
+## Datenmodell
+
+- `settings`: globale Spielparameter (`days_per_month`)
+- `fields`: Feldliste
+- `crops`: Feldfruechte + Aussaatfenster + Wachstumsdauer
+- `plans`: geplanter Anbau je Feld mit berechnetem Erntetermin
+
+Beim ersten Start werden Tabellen automatisch erstellt und Standardfruechte vorgeladen.
+
+## Lokale Entwicklung (ohne Docker)
+
+```bash
+set DB_DSN=farmcal:PASS@tcp(127.0.0.1:3306)/farmcal?parseTime=true
+go run ./cmd/server
+```
+
+## Neues Gitea-Repo anbinden
+
+```bash
+git init
+git add .
+git commit -m "Initial FarmCal MVP"
+git branch -M main
+git remote add origin <DEIN_GITEA_REPO_URL>
+git push -u origin main
+```
+
+## Nächste sinnvolle Ausbaustufen
+
+- Bearbeiten/Loeschen von Feldern und Plaenen
+- Kalenderansicht fuer mehrere Monate
+- Mehrspieler-/Benutzerverwaltung
+- Import/Export fuer bestehende Tabellen
diff --git a/cmd/server/main.go b/cmd/server/main.go
new file mode 100644
index 0000000..54592bf
--- /dev/null
+++ b/cmd/server/main.go
@@ -0,0 +1,453 @@
+package main
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"html/template"
+	"log"
+	"net/http"
+	"os"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+var monthNames = []string{
+	"Januar", "Februar", "Maerz", "April", "Mai", "Juni",
+	"Juli", "August", "September", "Oktober", "November", "Dezember",
+}
+
+type App struct {
+	db   *sql.DB
+	tmpl *template.Template
+}
+
+type Field struct {
+	ID     int64
+	Number int
+	Name   string
+}
+
+type Crop struct {
+	ID            int64
+	Name          string
+	SowStartMonth int
+	SowEndMonth   int
+	GrowMonths    int
+}
+
+type Plan struct {
+	ID           int64
+	FieldID      int64
+	FieldNumber  int
+	FieldName    string
+	CropID       int64
+	CropName     string
+	StartMonth   int
+	StartDay     int
+	HarvestMonth int
+	HarvestDay   int
+	Notes        string
+}
+
+type Task struct {
+	Type      string
+	Field     string
+	Message   string
+	SortOrder int
+}
+
+type MonthOption struct {
+	Value int
+	Label string
+}
+
+type PageData struct {
+	NowMonth     int
+	NowDay       int
+	DaysPerMonth int
+	Months       []MonthOption
+	Fields       []Field
+	Crops        []Crop
+	Plans        []Plan
+	Tasks        []Task
+	Error        string
+	Info         string
+}
+
+func main() {
+	addr := readEnv("APP_ADDR", ":8080")
+	dsn := readEnv("DB_DSN", "farmcal:farmcal@tcp(127.0.0.1:3306)/farmcal?parseTime=true")
+
+	db, err := sql.Open("mysql", dsn)
+	if err != nil {
+		log.Fatalf("db open failed: %v", err)
+	}
+	defer db.Close()
+
+	if err := db.Ping(); err != nil {
+		log.Fatalf("db ping failed: %v", err)
+	}
+	if err := ensureSchema(db); err != nil {
+		log.Fatalf("schema setup failed: %v", err)
+	}
+
+	tmpl, err := template.ParseFiles("templates/index.html")
+	if err != nil {
+		log.Fatalf("template parse failed: %v", err)
+	}
+
+	app := &App{db: db, tmpl: tmpl}
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", app.handleIndex)
+	mux.HandleFunc("/fields", app.handleCreateField)
+	mux.HandleFunc("/plans", app.handleCreatePlan)
+	mux.HandleFunc("/settings", app.handleSettings)
+	mux.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("static"))))
+
+	srv := &http.Server{
+		Addr:              addr,
+		Handler:           withLogging(mux),
+		ReadHeaderTimeout: 5 * time.Second,
+	}
+	log.Printf("FarmCal listening on %s", addr)
+	if err := srv.ListenAndServe(); !errors.Is(err, http.ErrServerClosed) {
+		log.Fatalf("server stopped: %v", err)
+	}
+}
+
+func (a *App) handleIndex(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	daysPerMonth, err := a.getDaysPerMonth()
+	if err != nil {
+		http.Error(w, "settings read failed", http.StatusInternalServerError)
+		return
+	}
+
+	nowMonth := mustInt(r.URL.Query().Get("month"), 1)
+	nowDay := mustInt(r.URL.Query().Get("day"), 1)
+	if nowMonth < 1 || nowMonth > 12 {
+		nowMonth = 1
+	}
+	if nowDay < 1 || nowDay > daysPerMonth {
+		nowDay = 1
+	}
+
+	fields, err := a.listFields()
+	if err != nil {
+		http.Error(w, "fields read failed", http.StatusInternalServerError)
+		return
+	}
+	crops, err := a.listCrops()
+	if err != nil {
+		http.Error(w, "crops read failed", http.StatusInternalServerError)
+		return
+	}
+	plans, err := a.listPlans()
+	if err != nil {
+		http.Error(w, "plans read failed", http.StatusInternalServerError)
+		return
+	}
+
+	data := PageData{
+		NowMonth:     nowMonth,
+		NowDay:       nowDay,
+		DaysPerMonth: daysPerMonth,
+		Months:       monthOptions(),
+		Fields:       fields,
+		Crops:        crops,
+		Plans:        plans,
+		Tasks:        buildTasksForDay(plans, nowMonth, nowDay),
+		Error:        r.URL.Query().Get("error"),
+		Info:         r.URL.Query().Get("info"),
+	}
+
+	if err := a.tmpl.Execute(w, data); err != nil {
+		http.Error(w, "template render failed", http.StatusInternalServerError)
+	}
+}
+
+func (a *App) handleCreateField(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	if err := r.ParseForm(); err != nil {
+		http.Redirect(w, r, "/?error=form+ungueltig", http.StatusSeeOther)
+		return
+	}
+	number := mustInt(r.FormValue("number"), 0)
+	name := strings.TrimSpace(r.FormValue("name"))
+	if number <= 0 {
+		http.Redirect(w, r, "/?error=Feldnummer+ungueltig", http.StatusSeeOther)
+		return
+	}
+	if _, err := a.db.Exec(`INSERT INTO fields(number,name) VALUES (?,?)`, number, name); err != nil {
+		http.Redirect(w, r, "/?error=Feld+nicht+angelegt", http.StatusSeeOther)
+		return
+	}
+	http.Redirect(w, r, "/?info=Feld+angelegt", http.StatusSeeOther)
+}
+
+func (a *App) handleCreatePlan(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	if err := r.ParseForm(); err != nil {
+		http.Redirect(w, r, "/?error=form+ungueltig", http.StatusSeeOther)
+		return
+	}
+
+	fieldID := mustInt64(r.FormValue("field_id"), 0)
+	cropID := mustInt64(r.FormValue("crop_id"), 0)
+	startMonth := mustInt(r.FormValue("start_month"), 1)
+	startDay := mustInt(r.FormValue("start_day"), 1)
+	notes := strings.TrimSpace(r.FormValue("notes"))
+
+	if fieldID <= 0 || cropID <= 0 {
+		http.Redirect(w, r, "/?error=Feld+oder+Frucht+ungueltig", http.StatusSeeOther)
+		return
+	}
+
+	daysPerMonth, err := a.getDaysPerMonth()
+	if err != nil {
+		http.Redirect(w, r, "/?error=Einstellungen+nicht+lesbar", http.StatusSeeOther)
+		return
+	}
+	if startMonth < 1 || startMonth > 12 || startDay < 1 || startDay > daysPerMonth {
+		http.Redirect(w, r, "/?error=Startdatum+ungueltig", http.StatusSeeOther)
+		return
+	}
+
+	var c Crop
+	err = a.db.QueryRow(`SELECT id,name,sow_start_month,sow_end_month,grow_months FROM crops WHERE id=?`, cropID).
+		Scan(&c.ID, &c.Name, &c.SowStartMonth, &c.SowEndMonth, &c.GrowMonths)
+	if err != nil {
+		http.Redirect(w, r, "/?error=Feldfrucht+nicht+gefunden", http.StatusSeeOther)
+		return
+	}
+
+	if !monthInWindow(startMonth, c.SowStartMonth, c.SowEndMonth) {
+		http.Redirect(w, r, "/?error=Aussaat+ausserhalb+des+Zeitfensters", http.StatusSeeOther)
+		return
+	}
+
+	harvestMonth := wrapMonth(startMonth + c.GrowMonths)
+	harvestDay := startDay
+	_, err = a.db.Exec(
+		`INSERT INTO plans(field_id,crop_id,start_month,start_day,harvest_month,harvest_day,notes) VALUES (?,?,?,?,?,?,?)`,
+		fieldID, cropID, startMonth, startDay, harvestMonth, harvestDay, notes,
+	)
+	if err != nil {
+		http.Redirect(w, r, "/?error=Plan+nicht+gespeichert", http.StatusSeeOther)
+		return
+	}
+	http.Redirect(w, r, "/?info=Plan+gespeichert", http.StatusSeeOther)
+}
+
+func (a *App) handleSettings(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	if err := r.ParseForm(); err != nil {
+		http.Redirect(w, r, "/?error=form+ungueltig", http.StatusSeeOther)
+		return
+	}
+	daysPerMonth := mustInt(r.FormValue("days_per_month"), 2)
+	if daysPerMonth < 1 || daysPerMonth > 31 {
+		http.Redirect(w, r, "/?error=Tage+pro+Monat+1-31", http.StatusSeeOther)
+		return
+	}
+	if _, err := a.db.Exec(`UPDATE settings SET days_per_month=? WHERE id=1`, daysPerMonth); err != nil {
+		http.Redirect(w, r, "/?error=Einstellungen+nicht+gespeichert", http.StatusSeeOther)
+		return
+	}
+	http.Redirect(w, r, "/?info=Einstellungen+gespeichert", http.StatusSeeOther)
+}
+
+func (a *App) getDaysPerMonth() (int, error) {
+	var v int
+	err := a.db.QueryRow(`SELECT days_per_month FROM settings WHERE id=1`).Scan(&v)
+	return v, err
+}
+
+func (a *App) listFields() ([]Field, error) {
+	rows, err := a.db.Query(`SELECT id,number,name FROM fields ORDER BY number`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []Field
+	for rows.Next() {
+		var x Field
+		if err := rows.Scan(&x.ID, &x.Number, &x.Name); err != nil {
+			return nil, err
+		}
+		out = append(out, x)
+	}
+	return out, rows.Err()
+}
+
+func (a *App) listCrops() ([]Crop, error) {
+	rows, err := a.db.Query(`SELECT id,name,sow_start_month,sow_end_month,grow_months FROM crops ORDER BY name`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []Crop
+	for rows.Next() {
+		var x Crop
+		if err := rows.Scan(&x.ID, &x.Name, &x.SowStartMonth, &x.SowEndMonth, &x.GrowMonths); err != nil {
+			return nil, err
+		}
+		out = append(out, x)
+	}
+	return out, rows.Err()
+}
+
+func (a *App) listPlans() ([]Plan, error) {
+	rows, err := a.db.Query(`
+		SELECT p.id,p.field_id,f.number,COALESCE(f.name,''),p.crop_id,c.name,p.start_month,p.start_day,p.harvest_month,p.harvest_day,COALESCE(p.notes,'')
+		FROM plans p
+		JOIN fields f ON f.id=p.field_id
+		JOIN crops c ON c.id=p.crop_id
+		ORDER BY p.start_month,p.start_day,f.number`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []Plan
+	for rows.Next() {
+		var x Plan
+		if err := rows.Scan(&x.ID, &x.FieldID, &x.FieldNumber, &x.FieldName, &x.CropID, &x.CropName, &x.StartMonth, &x.StartDay, &x.HarvestMonth, &x.HarvestDay, &x.Notes); err != nil {
+			return nil, err
+		}
+		out = append(out, x)
+	}
+	return out, rows.Err()
+}
+
+func ensureSchema(db *sql.DB) error {
+	stmts := []string{
+		`CREATE TABLE IF NOT EXISTS settings(id TINYINT PRIMARY KEY,days_per_month INT NOT NULL DEFAULT 2)`,
+		`INSERT INTO settings(id,days_per_month) VALUES (1,2) ON DUPLICATE KEY UPDATE id=id`,
+		`CREATE TABLE IF NOT EXISTS fields(id BIGINT AUTO_INCREMENT PRIMARY KEY,number INT NOT NULL UNIQUE,name VARCHAR(120) NOT NULL DEFAULT '',created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP)`,
+		`CREATE TABLE IF NOT EXISTS crops(id BIGINT AUTO_INCREMENT PRIMARY KEY,name VARCHAR(80) NOT NULL UNIQUE,sow_start_month TINYINT NOT NULL,sow_end_month TINYINT NOT NULL,grow_months TINYINT NOT NULL)`,
+		`CREATE TABLE IF NOT EXISTS plans(id BIGINT AUTO_INCREMENT PRIMARY KEY,field_id BIGINT NOT NULL,crop_id BIGINT NOT NULL,start_month TINYINT NOT NULL,start_day TINYINT NOT NULL,harvest_month TINYINT NOT NULL,harvest_day TINYINT NOT NULL,notes VARCHAR(255) NOT NULL DEFAULT '',created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,CONSTRAINT fk_plans_fields FOREIGN KEY(field_id) REFERENCES fields(id) ON DELETE CASCADE,CONSTRAINT fk_plans_crops FOREIGN KEY(crop_id) REFERENCES crops(id) ON DELETE RESTRICT)`,
+	}
+	for _, stmt := range stmts {
+		if _, err := db.Exec(stmt); err != nil {
+			return err
+		}
+	}
+	return seedCrops(db)
+}
+
+func seedCrops(db *sql.DB) error {
+	items := []Crop{
+		{Name: "Weizen", SowStartMonth: 9, SowEndMonth: 11, GrowMonths: 10},
+		{Name: "Gerste", SowStartMonth: 9, SowEndMonth: 10, GrowMonths: 9},
+		{Name: "Hafer", SowStartMonth: 3, SowEndMonth: 4, GrowMonths: 4},
+		{Name: "Raps", SowStartMonth: 8, SowEndMonth: 9, GrowMonths: 11},
+		{Name: "Mais", SowStartMonth: 4, SowEndMonth: 5, GrowMonths: 6},
+		{Name: "Sorghum", SowStartMonth: 4, SowEndMonth: 5, GrowMonths: 5},
+		{Name: "Sojabohnen", SowStartMonth: 4, SowEndMonth: 5, GrowMonths: 5},
+		{Name: "Sonnenblumen", SowStartMonth: 4, SowEndMonth: 5, GrowMonths: 5},
+		{Name: "Kartoffeln", SowStartMonth: 3, SowEndMonth: 4, GrowMonths: 7},
+		{Name: "Zuckerrueben", SowStartMonth: 3, SowEndMonth: 4, GrowMonths: 8},
+		{Name: "Baumwolle", SowStartMonth: 2, SowEndMonth: 3, GrowMonths: 8},
+	}
+	for _, c := range items {
+		if _, err := db.Exec(`INSERT INTO crops(name,sow_start_month,sow_end_month,grow_months) VALUES (?,?,?,?) ON DUPLICATE KEY UPDATE sow_start_month=VALUES(sow_start_month),sow_end_month=VALUES(sow_end_month),grow_months=VALUES(grow_months)`, c.Name, c.SowStartMonth, c.SowEndMonth, c.GrowMonths); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func buildTasksForDay(plans []Plan, month, day int) []Task {
+	var tasks []Task
+	for _, p := range plans {
+		field := fmt.Sprintf("Feld %d", p.FieldNumber)
+		if p.FieldName != "" {
+			field = fmt.Sprintf("Feld %d (%s)", p.FieldNumber, p.FieldName)
+		}
+		if p.StartMonth == month && p.StartDay == day {
+			tasks = append(tasks, Task{Type: "Aussaat", Field: field, Message: fmt.Sprintf("%s auf %s aussaeen", p.CropName, field), SortOrder: 1})
+		}
+		if p.HarvestMonth == month && p.HarvestDay == day {
+			tasks = append(tasks, Task{Type: "Ernte", Field: field, Message: fmt.Sprintf("%s auf %s ernten", p.CropName, field), SortOrder: 2})
+		}
+	}
+	sort.Slice(tasks, func(i, j int) bool {
+		if tasks[i].SortOrder == tasks[j].SortOrder {
+			return tasks[i].Field < tasks[j].Field
+		}
+		return tasks[i].SortOrder < tasks[j].SortOrder
+	})
+	return tasks
+}
+
+func monthOptions() []MonthOption {
+	out := make([]MonthOption, 0, 12)
+	for i, m := range monthNames {
+		out = append(out, MonthOption{Value: i + 1, Label: m})
+	}
+	return out
+}
+
+func monthInWindow(month, start, end int) bool {
+	if start <= end {
+		return month >= start && month <= end
+	}
+	return month >= start || month <= end
+}
+
+func wrapMonth(v int) int {
+	m := v % 12
+	if m == 0 {
+		return 12
+	}
+	return m
+}
+
+func mustInt(v string, fallback int) int {
+	n, err := strconv.Atoi(strings.TrimSpace(v))
+	if err != nil {
+		return fallback
+	}
+	return n
+}
+
+func mustInt64(v string, fallback int64) int64 {
+	n, err := strconv.ParseInt(strings.TrimSpace(v), 10, 64)
+	if err != nil {
+		return fallback
+	}
+	return n
+}
+
+func readEnv(key, fallback string) string {
+	v := strings.TrimSpace(os.Getenv(key))
+	if v == "" {
+		return fallback
+	}
+	return v
+}
+
+func withLogging(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+		next.ServeHTTP(w, r)
+		log.Printf("%s %s %s", r.Method, r.URL.Path, time.Since(start).Round(time.Millisecond))
+	})
+}
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..ce0ccf5
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,11 @@
+services:
+  farmcal:
+    build: .
+    image: farmcal:latest
+    container_name: farmcal
+    restart: unless-stopped
+    ports:
+      - "${APP_PORT:-8080}:8080"
+    environment:
+      APP_ADDR: ":8080"
+      DB_DSN: "${DB_DSN}"
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..16084e5
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module farmcal
+
+go 1.23
+
+require github.com/go-sql-driver/mysql v1.8.1
diff --git a/static/styles.css b/static/styles.css
new file mode 100644
index 0000000..ea44250
--- /dev/null
+++ b/static/styles.css
@@ -0,0 +1,113 @@
+:root {
+  --bg: #f2f5ef;
+  --card: #ffffff;
+  --text: #1f2a1d;
+  --muted: #5d6a5a;
+  --accent: #365f2c;
+  --accent-2: #93b877;
+  --danger: #9b2f2f;
+}
+
+* { box-sizing: border-box; }
+body {
+  margin: 0;
+  font-family: "Segoe UI", Tahoma, sans-serif;
+  background: radial-gradient(circle at top, #e8f1df, var(--bg));
+  color: var(--text);
+}
+
+.top {
+  padding: 1.2rem 1rem;
+  background: linear-gradient(90deg, #2f4f2a, #4d7a40);
+  color: #fff;
+}
+.top h1 { margin: 0; }
+.top p { margin: .35rem 0 0; opacity: .9; }
+
+.layout {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
+  gap: 1rem;
+  padding: 1rem;
+  max-width: 1280px;
+  margin: 0 auto;
+}
+
+.card {
+  background: var(--card);
+  border: 1px solid #dbe6d5;
+  border-radius: 12px;
+  padding: 1rem;
+  box-shadow: 0 8px 20px rgba(0,0,0,0.05);
+}
+.card h2 {
+  margin-top: 0;
+  font-size: 1.05rem;
+}
+
+.grid {
+  display: grid;
+  gap: .8rem;
+  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
+}
+.full { grid-column: 1 / -1; }
+.mt { margin-top: .8rem; }
+
+label {
+  display: grid;
+  gap: .35rem;
+  font-weight: 600;
+  color: var(--muted);
+}
+input, select, button {
+  font: inherit;
+  padding: .55rem .65rem;
+  border-radius: 8px;
+  border: 1px solid #c9d8c2;
+}
+button {
+  background: var(--accent);
+  color: #fff;
+  border: none;
+  cursor: pointer;
+  font-weight: 700;
+}
+button:hover { background: #2d5124; }
+
+.tasks {
+  margin: 0;
+  padding-left: 1.1rem;
+}
+.tasks li { margin: .35rem 0; }
+
+.table-wrap { overflow: auto; }
+table {
+  width: 100%;
+  border-collapse: collapse;
+}
+th, td {
+  text-align: left;
+  padding: .5rem;
+  border-bottom: 1px solid #e2eadf;
+  white-space: nowrap;
+}
+th {
+  background: #eef5e8;
+  color: #384534;
+}
+
+.toast {
+  position: fixed;
+  right: 1rem;
+  bottom: 1rem;
+  padding: .7rem .9rem;
+  border-radius: 8px;
+  color: #fff;
+  max-width: 380px;
+}
+.toast.error { background: var(--danger); }
+.toast.info { background: #2f6d7a; }
+
+@media (max-width: 700px) {
+  .layout { grid-template-columns: 1fr; }
+}
diff --git a/templates/index.html b/templates/index.html
new file mode 100644
index 0000000..8134690
--- /dev/null
+++ b/templates/index.html
@@ -0,0 +1,145 @@
+<!doctype html>
+<html lang="de">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>FarmCal</title>
+  <link rel="stylesheet" href="/static/styles.css">
+</head>
+<body>
+  <header class="top">
+    <h1>FarmCal</h1>
+    <p>Planung fuer Felder, Aussaat und Ernte</p>
+  </header>
+
+  <main class="layout">
+    <section class="card">
+      <h2>Ingame-Zeit</h2>
+      <form method="get" action="/" class="grid">
+        <label>Monat
+          <select name="month">
+            {{range .Months}}
+            <option value="{{.Value}}" {{if eq $.NowMonth .Value}}selected{{end}}>{{.Label}}</option>
+            {{end}}
+          </select>
+        </label>
+        <label>Tag
+          <input type="number" name="day" min="1" max="{{.DaysPerMonth}}" value="{{.NowDay}}">
+        </label>
+        <button type="submit">Anzeigen</button>
+      </form>
+
+      <form method="post" action="/settings" class="grid mt">
+        <label>Tage pro Monat
+          <input type="number" name="days_per_month" min="1" max="31" value="{{.DaysPerMonth}}">
+        </label>
+        <button type="submit">Speichern</button>
+      </form>
+    </section>
+
+    <section class="card">
+      <h2>Heutige Aufgaben</h2>
+      {{if .Tasks}}
+      <ul class="tasks">
+        {{range .Tasks}}
+        <li>
+          <strong>{{.Type}}:</strong> {{.Message}}
+        </li>
+        {{end}}
+      </ul>
+      {{else}}
+      <p>Keine Aufgaben fuer diesen Ingame-Tag.</p>
+      {{end}}
+    </section>
+
+    <section class="card">
+      <h2>Feld anlegen</h2>
+      <form method="post" action="/fields" class="grid">
+        <label>Feldnummer
+          <input type="number" name="number" min="1" required>
+        </label>
+        <label>Name (optional)
+          <input type="text" name="name" maxlength="120">
+        </label>
+        <button type="submit">Feld speichern</button>
+      </form>
+    </section>
+
+    <section class="card">
+      <h2>Anbau planen</h2>
+      <form method="post" action="/plans" class="grid">
+        <label>Feld
+          <select name="field_id" required>
+            <option value="">Bitte waehlen</option>
+            {{range .Fields}}
+            <option value="{{.ID}}">Feld {{.Number}}{{if .Name}} ({{.Name}}){{end}}</option>
+            {{end}}
+          </select>
+        </label>
+
+        <label>Feldfrucht
+          <select name="crop_id" required>
+            <option value="">Bitte waehlen</option>
+            {{range .Crops}}
+            <option value="{{.ID}}">{{.Name}} (Aussaat Monat {{.SowStartMonth}}-{{.SowEndMonth}})</option>
+            {{end}}
+          </select>
+        </label>
+
+        <label>Startmonat
+          <select name="start_month" required>
+            {{range .Months}}
+            <option value="{{.Value}}" {{if eq $.NowMonth .Value}}selected{{end}}>{{.Label}}</option>
+            {{end}}
+          </select>
+        </label>
+
+        <label>Starttag
+          <input type="number" name="start_day" min="1" max="{{.DaysPerMonth}}" value="{{.NowDay}}" required>
+        </label>
+
+        <label class="full">Notiz
+          <input type="text" name="notes" maxlength="255">
+        </label>
+
+        <button type="submit">Plan speichern</button>
+      </form>
+    </section>
+
+    <section class="card">
+      <h2>Geplante Durchlaeufe</h2>
+      <div class="table-wrap">
+        <table>
+          <thead>
+            <tr>
+              <th>Feld</th>
+              <th>Frucht</th>
+              <th>Aussaat</th>
+              <th>Ernte</th>
+              <th>Notiz</th>
+            </tr>
+          </thead>
+          <tbody>
+            {{if .Plans}}
+              {{range .Plans}}
+              <tr>
+                <td>Feld {{.FieldNumber}}{{if .FieldName}} ({{.FieldName}}){{end}}</td>
+                <td>{{.CropName}}</td>
+                <td>Monat {{.StartMonth}} Tag {{.StartDay}}</td>
+                <td>Monat {{.HarvestMonth}} Tag {{.HarvestDay}}</td>
+                <td>{{.Notes}}</td>
+              </tr>
+              {{end}}
+            {{else}}
+              <tr><td colspan="5">Noch keine Planung vorhanden.</td></tr>
+            {{end}}
+          </tbody>
+        </table>
+      </div>
+    </section>
+  </main>
+
+  {{if .Error}}<div class="toast error">{{.Error}}</div>{{end}}
+  {{if .Info}}<div class="toast info">{{.Info}}</div>{{end}}
+</body>
+</html>