nextjs upgrade

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [eslint-plugin-react-hooks](https://react.dev/) ([source](https://github.com/facebook/react/tree/HEAD/packages/eslint-plugin-react-hooks)) | devDependencies | pin | [`^5.2.0` -> `5.2.0`](https://renovatebot.com/diffs/npm/eslint-plugin-react-hooks/5.2.0/5.2.0) |
| [pnpm/action-setup](https://github.com/pnpm/action-setup) | action | pinDigest |  -> `a7487c7` |

Add the preset `:preserveSemverRanges` to your config if you don't want to pin your dependencies.

---

### Configuration

📅 **Schedule**: Branch creation - "every weekend" (UTC), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

👻 **Immortal**: This PR will be recreated if closed unmerged. Get [config help](https://github.com/renovatebot/renovate/discussions) if that's undesired.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS4zMS4xIiwidXBkYXRlZEluVmVyIjoiNDEuMzEuMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

Reviewed-on: #7
Co-authored-by: Renovate Bot <renovatebot@schulze.network>
Co-committed-by: Renovate Bot <renovatebot@schulze.network>

.gitattributes

@@ -0,0 +1,2 @@
+*.png filter=lfs diff=lfs merge=lfs -text
+*.ico filter=lfs diff=lfs merge=lfs -text

.gitea/workflows/check.yml

@@ -0,0 +1,31 @@
+name: Lint
+
+on:
+  pull_request:
+  push:
+    branches:
+      - "**" # matches every branch
+
+jobs:
+  lint_and_typecheck:
+    name: Lint and Typecheck
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@a7487c7e89a18df4991f7f222e4898a00d66ddda # v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        with:
+          node-version: 22
+          cache: "pnpm"
+
+      - name: Install dependencies
+        run: pnpm install
+
+      - name: Run check
+        run: pnpm run check

README.md

@@ -1,3 +1,108 @@
-# fire
+![InvestingFIRE logo](/src/app/apple-icon.png)
 
-FIRE calculator
+# InvestingFIRE 🔥 — The #1 Interactive FIRE Calculator
+
+**InvestingFIRE** is a responsive web application for calculating your path to Financial Independence and Early Retirement (FIRE). It features a year-by-year projection engine that simulates both accumulation (savings and investment growth) and retirement (withdrawals) phases, allowing users to:
+
+- Input starting capital, monthly savings, expected annual growth rate, inflation rate, current age, desired retirement age, life expectancy, and desired monthly retirement allowance.
+- View a dynamic chart displaying projected portfolio balance and monthly allowance over time.
+- Instantly see their estimated “FIRE number” (required capital at retirement), how long their capital will last, and compare results to the “4% rule.”
+- Adjust assumptions live, with all calculations and visualizations updating automatically.
+- Access explanatory content about FIRE methodology, key variables, and additional community resources, all on a single, consolidated page.
+
+The project’s code is structured using React/Next.js with TypeScript, focusing on user experience, modern UI components, and clarity of financial assumptions.
+
+---
+
+## 🚀 Features at a Glance
+
+- **⚡️ Real-Time Projections:** Every field updates the chart _as you type_. Experiment with savings, growth rates, inflation, or retirement age and see your future instantly.
+- **📈 Interactive Chart:** Dual-area plots for portfolio value and future monthly spending, plus reference lines for FIRE milestones and “4% rule” legends.
+- **🧠 Education Baked In:** Contextual tooltips, deep-dive sections on how FIRE works, FAQs, and must-read resources included.
+- **🔎 Detailed Methodology:** Not just a 25x rule — runs a full, year-by-year simulation with inflation-adjusted withdrawals and optional 4%-rule overlays.
+- **👌 Modern UX:** Typing, sliding, or clicking feels _good_. Responsive on all devices.
+
+---
+
+## 🧰 How It Works
+
+The calculator models your FIRE journey in two phases:
+
+1. **Accumulation:**
+   - Your starting capital is grown by your expected CAGR (~7% by default).
+   - Monthly savings are added for each year until retirement.
+   - Every variable can be adjusted live (capital, savings, age, growth, inflation, spending, target retirement).
+
+2. **Retirement:**
+   - Your balance continues to grow by CAGR.
+   - Each year, an inflation-adjusted monthly allowance is withdrawn.
+   - The simulation runs until your selected life expectancy, showing the possibility of portfolio depletion.
+
+**Key Outputs:**
+
+- 🔥 “FIRE Number”: Portfolio value at your defined retirement age
+- 📊 Interactive projection chart: See how your nest egg and withdrawals evolve over time
+- 4️⃣ “4% Rule” overlays: Compare dynamic results to classic rule-of-thumb
+
+---
+
+## 🌟 Try It For Yourself
+
+To run locally:
+
+1. **Clone the repo**
+   ```bash
+   git clone https://git.schulze.network/schulze/fire.git
+   cd fire
+   ```
+2. **Install dependencies**
+   ```bash
+   pnpm install
+   ```
+3. **Run the app**
+   ```bash
+   pnpm run dev
+   ```
+4. Visit [http://localhost:3000](http://localhost:3000) and unleash the fire.
+
+Deployed version: [https://investingfire.com](https://investingfire.com)
+
+---
+
+## ✏️ Inputs & Variables
+
+- **Starting Capital** — How much you’ve already invested
+- **Monthly Savings** — What you’ll add each month
+- **Current Age & Retirement Age** — Your FI timeline
+- **Life Expectancy** — How long do you want income to last?
+- **Expected Growth Rate (CAGR)** — Portfolio annual % return, before inflation
+- **Inflation Rate** — Cost of living increases
+- **Desired Monthly Allowance** — Your lifestyle, today’s dollars
+
+As you adjust these, all projections update instantly _without needing to hit “Calculate.”_
+
+Try many “what ifs” fast.
+
+---
+
+## 👩‍💻 Contributing
+
+Pull requests are welcome! Open issues for bugs, new features, or debate about safe withdrawal rates and tax assumptions.
+
+---
+
+## 📄 License
+
+[GPL-3.0](./LICENSE)
+
+---
+
+## 🥇 Why Use InvestingFIRE?
+
+- You want the truth — not just a 4% fantasy.
+- You want to learn, not just punch in numbers.
+- You want clarity, speed, and modern UI.
+- You want to show your friends the best FIRE tool on the web.
+
+Enjoy the _rocket ride_ to financial independence.  
+**InvestingFIRE — Know your number. Change your future.**

components.json

@@ -11,11 +11,11 @@
     "prefix": ""
   },
   "aliases": {
-    "components": "~/components",
+    "components": "@/components",
-    "utils": "~/lib/utils",
+    "utils": "@/lib/utils",
-    "ui": "~/components/ui",
+    "ui": "@/components/ui",
-    "lib": "~/lib",
+    "lib": "@/lib",
-    "hooks": "~/hooks"
+    "hooks": "@/hooks"
   },
   "iconLibrary": "lucide"
-}
+}

eslint.config.js

@@ -14,7 +14,7 @@ export default tseslint.config(
     files: ["**/*.ts", "**/*.tsx"],
     extends: [
       ...tseslint.configs.recommended,
-      ...tseslint.configs.strictTypeChecked,
+      ...tseslint.configs.recommendedTypeChecked,
       ...tseslint.configs.stylisticTypeChecked,
     ],
     rules: {

package.json

@@ -6,48 +6,52 @@
   "scripts": {
     "build": "next build",
     "check": "next lint && tsc --noEmit",
-    "dev": "next dev --turbo",
+    "dev": "next dev --turbopack",
     "format:check": "prettier --check \"**/*.{ts,tsx,js,jsx,mdx}\" --cache",
     "format:write": "prettier --write \"**/*.{ts,tsx,js,jsx,mdx}\" --cache",
-    "lint": "next lint",
     "lint:fix": "next lint --fix",
     "preview": "next build && next start",
-    "start": "next start",
+    "start": "next start"
-    "typecheck": "tsc --noEmit"
   },
   "dependencies": {
     "@hookform/resolvers": "^5.0.1",
+    "@radix-ui/react-accordion": "^1.2.8",
     "@radix-ui/react-label": "^2.1.4",
+    "@radix-ui/react-select": "^2.2.2",
+    "@radix-ui/react-slider": "^1.3.2",
     "@radix-ui/react-slot": "^1.2.0",
-    "@t3-oss/env-nextjs": "^0.12.0",
+    "@t3-oss/env-nextjs": "^0.13.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
-    "lucide-react": "^0.503.0",
+    "lucide-react": "^0.525.0",
-    "next": "^15.2.3",
+    "next": "^15.4.1",
+    "next-plausible": "^3.12.4",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "react-hook-form": "^7.56.1",
+    "recharts": "^2.15.3",
     "tailwind-merge": "^3.2.0",
-    "zod": "^3.24.3"
+    "zod": "^4.0.0"
   },
   "devDependencies": {
-    "@eslint/eslintrc": "^3.3.1",
+    "@eslint/eslintrc": "3.3.1",
-    "@tailwindcss/postcss": "^4.0.15",
+    "@tailwindcss/postcss": "4.1.11",
-    "@types/node": "^20.14.10",
+    "@types/node": "22.16.3",
-    "@types/react": "^19.0.0",
+    "@types/react": "19.1.8",
-    "@types/react-dom": "^19.0.0",
+    "@types/react-dom": "19.1.6",
-    "eslint": "^9.23.0",
+    "eslint": "9.31.0",
-    "eslint-config-next": "^15.2.3",
+    "eslint-config-next": "15.4.1",
-    "postcss": "^8.5.3",
+    "eslint-plugin-react-hooks": "5.2.0",
-    "prettier": "^3.5.3",
+    "postcss": "8.5.6",
-    "prettier-plugin-tailwindcss": "^0.6.11",
+    "prettier": "3.6.2",
-    "tailwindcss": "^4.0.15",
+    "prettier-plugin-tailwindcss": "0.6.14",
-    "tw-animate-css": "^1.2.8",
+    "tailwindcss": "4.1.11",
-    "typescript": "^5.8.2",
+    "tw-animate-css": "1.3.5",
-    "typescript-eslint": "^8.27.0"
+    "typescript": "5.8.3",
+    "typescript-eslint": "8.36.0"
   },
   "ct3aMetadata": {
     "initVersion": "7.39.3"
   },
-  "packageManager": "npm@11.2.0"
+  "packageManager": "pnpm@10.13.1"
 }

pnpm-workspace.yaml

@@ -0,0 +1,6 @@
+ignoredBuiltDependencies:
+  - unrs-resolver
+
+onlyBuiltDependencies:
+  - '@tailwindcss/oxide'
+  - sharp

public/investingfire_logo_no-bg.svg

@@ -0,0 +1 @@
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public/wgu5fuk8d5j5wp3pjtta9vrw8d9by9qk.txt

@@ -0,0 +1 @@
+wgu5fuk8d5j5wp3pjtta9vrw8d9by9qk

renovate.json

@@ -0,0 +1,11 @@
+{
+  "extends": ["config:best-practices", ":semanticCommits"],
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "packageRules": [
+    {
+      "matchUpdateTypes": ["minor", "patch", "pin", "digest"],
+      "automerge": true,
+      "automergeType": "branch"
+    }
+  ]
+}

src/app/components/BackgroundPattern.tsx

@@ -0,0 +1,157 @@
+"use client";
+import { useState, useEffect } from "react";
+import {
+  type LucideIcon,
+  HandCoins,
+  Bitcoin,
+  Coins,
+  DollarSign,
+  Euro,
+  IndianRupee,
+  JapaneseYen,
+  PiggyBank,
+  PoundSterling,
+  Wallet,
+  Banknote,
+  ChartCandlestick,
+  CirclePercent,
+  CreditCard,
+  Gem,
+  Receipt,
+  ShoppingBasket,
+  Rocket,
+  RockingChair,
+  Sparkles,
+  ChartPie,
+  ChartBar,
+  BarChart3,
+  ChartLine,
+  TrendingDown,
+  TrendingUp,
+  Vault,
+  Landmark,
+  Briefcase,
+  Handshake,
+  Shield,
+  Lock,
+  CalendarRange,
+  Hourglass,
+  Sprout,
+  Target,
+} from "lucide-react";
+
+export default function MultiIconPattern({ opacity = 0.2, spacing = 160 }) {
+  const [width, setWidth] = useState(0);
+  const [height, setHeight] = useState(0);
+  const [rows, setRows] = useState(0);
+  const [columns, setColumns] = useState(0);
+
+  useEffect(() => {
+    const updateDimensions = () => {
+      if (window.innerWidth > width + spacing * 2) {
+        setWidth(window.innerWidth);
+      }
+      if (window.innerHeight > height + spacing * 2) {
+        setHeight(window.innerHeight);
+      }
+    };
+
+    updateDimensions();
+    window.addEventListener("resize", updateDimensions);
+
+    return () => {
+      window.removeEventListener("resize", updateDimensions);
+    };
+  }, [height, width, spacing]);
+
+  useEffect(() => {
+    setColumns(Math.ceil(width / spacing) + 3);
+  }, [width, spacing]);
+
+  useEffect(() => {
+    setRows(Math.ceil(height / spacing) + 3);
+  }, [height, spacing]);
+
+  // Explicitly type the array as LucideIcon[]
+  const iconComponents: LucideIcon[] = [
+    HandCoins,
+    Bitcoin,
+    Coins,
+    DollarSign,
+    Euro,
+    IndianRupee,
+    JapaneseYen,
+    PiggyBank,
+    PoundSterling,
+    Wallet,
+    Banknote,
+    ChartCandlestick,
+    CirclePercent,
+    CreditCard,
+    Gem,
+    Receipt,
+    ShoppingBasket,
+    Rocket,
+    RockingChair,
+    Sparkles,
+    ChartPie,
+    ChartBar,
+    BarChart3,
+    ChartLine,
+    TrendingDown,
+    TrendingUp,
+    Vault,
+    Landmark,
+    Briefcase,
+    Handshake,
+    Shield,
+    Lock,
+    CalendarRange,
+    Hourglass,
+    Sprout,
+    Target,
+  ];
+
+  const renderIcons = ({
+    rows,
+    columns,
+  }: {
+    rows: number;
+    columns: number;
+  }) => {
+    const icons = [];
+    for (let y = 0; y < rows; y++) {
+      for (let x = 0; x < columns; x++) {
+        // Pick a random icon component from the array
+        const randomIndex = Math.floor(Math.random() * iconComponents.length);
+        const IconComponent = iconComponents[randomIndex]!;
+
+        // Slightly randomize size and position for more organic feel
+        const size = 28 + Math.floor(Math.random() * 8);
+        const xOffset = Math.floor(Math.random() * (spacing / 1.618));
+        const yOffset = Math.floor(Math.random() * (spacing / 1.618));
+
+        icons.push(
+          <IconComponent
+            key={`icon-${x}-${y}`}
+            size={size}
+            className="text-primary fixed"
+            style={{
+              left: `${x * spacing + xOffset}px`,
+              top: `${y * spacing + yOffset}px`,
+              opacity: opacity,
+              transform: `rotate(${Math.round((Math.random() - 0.5) * 30)}deg)`,
+            }}
+          />,
+        );
+      }
+    }
+    return icons;
+  };
+
+  return (
+    <div className="absolute h-full w-full">
+      {width > 0 && renderIcons({ rows, columns })}
+    </div>
+  );
+}

src/app/components/FireCalculatorForm.tsx

@@ -0,0 +1,741 @@
+"use client";
+
+import { useState } from "react";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { useForm } from "react-hook-form";
+import * as z from "zod";
+
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import {
+  Form,
+  FormControl,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import { ChartContainer, ChartTooltip } from "@/components/ui/chart";
+import {
+  Area,
+  AreaChart,
+  CartesianGrid,
+  XAxis,
+  YAxis,
+  ReferenceLine,
+  type TooltipProps,
+} from "recharts";
+import { Slider } from "@/components/ui/slider";
+import assert from "assert";
+import type {
+  NameType,
+  ValueType,
+} from "recharts/types/component/DefaultTooltipContent";
+
+// Schema for form validation
+const formSchema = z.object({
+  startingCapital: z.coerce.number(),
+  monthlySavings: z.coerce
+    .number()
+    .min(0, "Monthly savings must be a non-negative number"),
+  currentAge: z.coerce
+    .number()
+    .min(1, "Age must be at least 1")
+    .max(100, "No point in starting this late"),
+  cagr: z.coerce.number().min(0, "Growth rate must be a non-negative number"),
+  desiredMonthlyAllowance: z.coerce
+    .number()
+    .min(0, "Monthly allowance must be a non-negative number"),
+  inflationRate: z.coerce
+    .number()
+    .min(0, "Inflation rate must be a non-negative number"),
+  lifeExpectancy: z.coerce
+    .number()
+    .min(40, "Be a bit more optimistic buddy :(")
+    .max(100, "You should be more realistic..."),
+  retirementAge: z.coerce
+    .number()
+    .min(18, "Retirement age must be at least 18")
+    .max(100, "Retirement age must be at most 100"),
+});
+
+// Type for form values
+type FormValues = z.infer<typeof formSchema>;
+
+interface YearlyData {
+  age: number;
+  year: number;
+  balance: number;
+  untouchedBalance: number;
+  phase: "accumulation" | "retirement";
+  monthlyAllowance: number;
+  untouchedMonthlyAllowance: number;
+}
+
+interface CalculationResult {
+  fireNumber: number | null;
+  fireNumber4percent: number | null;
+  retirementAge4percent: number | null;
+  yearlyData: YearlyData[];
+  error?: string;
+}
+
+// Helper function to format currency without specific symbols
+const formatNumber = (value: number | null) => {
+  if (!value) return "N/A";
+  return new Intl.NumberFormat("en", {
+    maximumFractionDigits: 0,
+  }).format(value);
+};
+
+// Helper function to render tooltip for chart
+const tooltipRenderer = ({
+  active,
+  payload,
+}: TooltipProps<ValueType, NameType>) => {
+  if (active && payload?.[0]?.payload) {
+    const data = payload[0].payload as YearlyData;
+    return (
+      <div className="bg-background border p-2 shadow-sm">
+        <p className="font-medium">{`Year: ${data.year.toString()} (Age: ${data.age.toString()})`}</p>
+        <p className="text-orange-500">{`Balance: ${formatNumber(data.balance)}`}</p>
+        <p className="text-red-600">{`Monthly allowance: ${formatNumber(data.monthlyAllowance)}`}</p>
+        <p>{`Phase: ${data.phase === "accumulation" ? "Accumulation" : "Retirement"}`}</p>
+      </div>
+    );
+  }
+  return null;
+};
+
+export default function FireCalculatorForm() {
+  const [result, setResult] = useState<CalculationResult | null>(null);
+  const irlYear = new Date().getFullYear();
+  const [showing4percent, setShowing4percent] = useState(false);
+
+  // Initialize form with default values
+  const form = useForm<z.input<typeof formSchema>, undefined, FormValues>({
+    resolver: zodResolver(formSchema),
+    defaultValues: {
+      startingCapital: 50000,
+      monthlySavings: 1500,
+      currentAge: 25,
+      cagr: 7,
+      desiredMonthlyAllowance: 3000,
+      inflationRate: 2.3,
+      lifeExpectancy: 84,
+      retirementAge: 55,
+    },
+  });
+
+  function onSubmit(values: FormValues) {
+    setResult(null); // Reset previous results
+
+    const startingCapital = values.startingCapital;
+    const monthlySavings = values.monthlySavings;
+    const age = values.currentAge;
+    const annualGrowthRate = 1 + values.cagr / 100;
+    const initialMonthlyAllowance = values.desiredMonthlyAllowance;
+    const annualInflation = 1 + values.inflationRate / 100;
+    const ageOfDeath = values.lifeExpectancy;
+    const retirementAge = values.retirementAge;
+
+    // Array to store yearly data for the chart
+    const yearlyData: YearlyData[] = [];
+
+    // Initial year data
+    yearlyData.push({
+      age: age,
+      year: irlYear,
+      balance: startingCapital,
+      untouchedBalance: startingCapital,
+      phase: "accumulation",
+      monthlyAllowance: 0,
+      untouchedMonthlyAllowance: initialMonthlyAllowance,
+    });
+
+    // Calculate accumulation phase (before retirement)
+    for (let year = irlYear + 1; year <= irlYear + (ageOfDeath - age); year++) {
+      const currentAge = age + (year - irlYear);
+      const previousYearData = yearlyData[yearlyData.length - 1];
+      const inflatedAllowance =
+        initialMonthlyAllowance * Math.pow(annualInflation, year - irlYear);
+
+      const isRetirementYear = currentAge >= retirementAge;
+      const phase = isRetirementYear ? "retirement" : "accumulation";
+
+      assert(!!previousYearData);
+      // Calculate balance based on phase
+      let newBalance;
+      if (phase === "accumulation") {
+        // During accumulation: grow previous balance + add savings
+        newBalance =
+          previousYearData.balance * annualGrowthRate + monthlySavings * 12;
+      } else {
+        // During retirement: grow previous balance - withdraw allowance
+        newBalance =
+          previousYearData.balance * annualGrowthRate - inflatedAllowance * 12;
+      }
+      const untouchedBalance =
+        previousYearData.untouchedBalance * annualGrowthRate +
+        monthlySavings * 12;
+      const allowance = phase === "retirement" ? inflatedAllowance : 0;
+      yearlyData.push({
+        age: currentAge,
+        year: year,
+        balance: newBalance,
+        untouchedBalance: untouchedBalance,
+        phase: phase,
+        monthlyAllowance: allowance,
+        untouchedMonthlyAllowance: inflatedAllowance,
+      });
+    }
+
+    // Calculate FIRE number at retirement
+    const retirementYear = irlYear + (retirementAge - age);
+    const retirementIndex = yearlyData.findIndex(
+      (data) => data.year === retirementYear,
+    );
+    const retirementData = yearlyData[retirementIndex];
+
+    const [fireNumber4percent, retirementAge4percent] = (() => {
+      for (const yearData of yearlyData) {
+        if (
+          yearData.untouchedBalance >
+          (yearData.untouchedMonthlyAllowance * 12) / 0.04
+        ) {
+          return [yearData.untouchedBalance, yearData.age];
+        }
+      }
+      return [0, 0];
+    })();
+
+    if (retirementIndex === -1 || !retirementData) {
+      setResult({
+        fireNumber: null,
+        fireNumber4percent: null,
+        retirementAge4percent: null,
+        error: "Could not calculate retirement data",
+        yearlyData: yearlyData,
+      });
+    } else {
+      // Set the result
+      setResult({
+        fireNumber: retirementData.balance,
+        fireNumber4percent: fireNumber4percent,
+        retirementAge4percent: retirementAge4percent,
+        yearlyData: yearlyData,
+      });
+    }
+  }
+
+  return (
+    <>
+      <Card className="mb-4">
+        <CardHeader>
+          <CardTitle className="text-2xl">FIRE Calculator</CardTitle>
+          <CardDescription>
+            Calculate your path to financial independence and retirement
+          </CardDescription>
+        </CardHeader>
+        <CardContent>
+          <Form {...form}>
+            <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-8">
+              <div className="grid grid-cols-1 gap-6 md:grid-cols-2">
+                <FormField
+                  control={form.control}
+                  name="startingCapital"
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>Starting Capital</FormLabel>
+                      <FormControl>
+                        <Input
+                          placeholder="e.g., 10000"
+                          type="number"
+                          value={field.value as number | string | undefined}
+                          onChange={(e) => {
+                            field.onChange(
+                              e.target.value === ""
+                                ? undefined
+                                : Number(e.target.value),
+                            );
+                            void form.handleSubmit(onSubmit)();
+                          }}
+                          onBlur={field.onBlur}
+                          name={field.name}
+                          ref={field.ref}
+                        />
+                      </FormControl>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+                <FormField
+                  control={form.control}
+                  name="monthlySavings"
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>Monthly Savings</FormLabel>
+                      <FormControl>
+                        <Input
+                          placeholder="e.g., 500"
+                          type="number"
+                          value={field.value as number | string | undefined}
+                          onChange={(e) => {
+                            field.onChange(
+                              e.target.value === ""
+                                ? undefined
+                                : Number(e.target.value),
+                            );
+                            void form.handleSubmit(onSubmit)();
+                          }}
+                          onBlur={field.onBlur}
+                          name={field.name}
+                          ref={field.ref}
+                        />
+                      </FormControl>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+                <FormField
+                  control={form.control}
+                  name="currentAge"
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>Current Age</FormLabel>
+                      <FormControl>
+                        <Input
+                          placeholder="e.g., 30"
+                          type="number"
+                          value={field.value as number | string | undefined}
+                          onChange={(e) => {
+                            field.onChange(
+                              e.target.value === ""
+                                ? undefined
+                                : Number(e.target.value),
+                            );
+                            void form.handleSubmit(onSubmit)();
+                          }}
+                          onBlur={field.onBlur}
+                          name={field.name}
+                          ref={field.ref}
+                        />
+                      </FormControl>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+                <FormField
+                  control={form.control}
+                  name="lifeExpectancy"
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>Life Expectancy (Age)</FormLabel>
+                      <FormControl>
+                        <Input
+                          placeholder="e.g., 90"
+                          type="number"
+                          value={field.value as number | string | undefined}
+                          onChange={(e) => {
+                            field.onChange(
+                              e.target.value === ""
+                                ? undefined
+                                : Number(e.target.value),
+                            );
+                            void form.handleSubmit(onSubmit)();
+                          }}
+                          onBlur={field.onBlur}
+                          name={field.name}
+                          ref={field.ref}
+                        />
+                      </FormControl>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+                <FormField
+                  control={form.control}
+                  name="cagr"
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>Expected Annual Growth Rate (%)</FormLabel>
+                      <FormControl>
+                        <Input
+                          placeholder="e.g., 7"
+                          type="number"
+                          step="0.1"
+                          value={field.value as number | string | undefined}
+                          onChange={(e) => {
+                            field.onChange(
+                              e.target.value === ""
+                                ? undefined
+                                : Number(e.target.value),
+                            );
+                            void form.handleSubmit(onSubmit)();
+                          }}
+                          onBlur={field.onBlur}
+                          name={field.name}
+                          ref={field.ref}
+                        />
+                      </FormControl>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+                <FormField
+                  control={form.control}
+                  name="inflationRate"
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>Annual Inflation Rate (%)</FormLabel>
+                      <FormControl>
+                        <Input
+                          placeholder="e.g., 2"
+                          type="number"
+                          step="0.1"
+                          value={field.value as number | string | undefined}
+                          onChange={(e) => {
+                            field.onChange(
+                              e.target.value === ""
+                                ? undefined
+                                : Number(e.target.value),
+                            );
+                            void form.handleSubmit(onSubmit)();
+                          }}
+                          onBlur={field.onBlur}
+                          name={field.name}
+                          ref={field.ref}
+                        />
+                      </FormControl>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+                <FormField
+                  control={form.control}
+                  name="desiredMonthlyAllowance"
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>
+                        Desired Monthly Allowance (Today&apos;s Value)
+                      </FormLabel>
+                      <FormControl>
+                        <Input
+                          placeholder="e.g., 2000"
+                          type="number"
+                          value={field.value as number | string | undefined}
+                          onChange={(e) => {
+                            field.onChange(
+                              e.target.value === ""
+                                ? undefined
+                                : Number(e.target.value),
+                            );
+                            void form.handleSubmit(onSubmit)();
+                          }}
+                          onBlur={field.onBlur}
+                          name={field.name}
+                          ref={field.ref}
+                        />
+                      </FormControl>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+
+                {/* Retirement Age Slider */}
+                <FormField
+                  control={form.control}
+                  name="retirementAge"
+                  render={({ field }) => (
+                    <FormItem>
+                      <FormLabel>
+                        Retirement Age: {field.value as number}
+                      </FormLabel>
+                      <FormControl>
+                        <Slider
+                          name="retirementAge"
+                          value={[field.value as number]}
+                          min={25}
+                          max={75}
+                          step={1}
+                          onValueChange={(value: number[]) => {
+                            field.onChange(value[0]);
+                            void form.handleSubmit(onSubmit)();
+                          }}
+                          className="py-4"
+                        />
+                      </FormControl>
+                      <FormMessage />
+                    </FormItem>
+                  )}
+                />
+              </div>
+
+              {!result && (
+                <Button type="submit" className="w-full">
+                  Calculate
+                </Button>
+              )}
+              {result?.yearlyData && (
+                <Card className="rounded-md shadow-none">
+                  <CardHeader>
+                    <CardTitle>Financial Projection</CardTitle>
+                    <CardDescription>
+                      Projected balance growth with your selected retirement age
+                    </CardDescription>
+                  </CardHeader>
+                  <CardContent className="px-2">
+                    <ChartContainer
+                      className="aspect-auto h-80 w-full"
+                      config={{}}
+                    >
+                      <AreaChart
+                        data={result.yearlyData}
+                        margin={{ top: 10, right: 20, left: 20, bottom: 10 }}
+                      >
+                        <CartesianGrid strokeDasharray="3 3" />
+                        <XAxis
+                          dataKey="year"
+                          label={{
+                            value: "Year",
+                            position: "insideBottom",
+                            offset: -10,
+                          }}
+                        />
+                        {/* Right Y axis */}
+                        <YAxis
+                          yAxisId={"right"}
+                          orientation="right"
+                          tickFormatter={(value: number) => {
+                            if (value >= 1000000) {
+                              return `${(value / 1000000).toPrecision(3)}M`;
+                            } else if (value >= 1000) {
+                              return `${(value / 1000).toPrecision(3)}K`;
+                            } else if (value <= -1000000) {
+                              return `${(value / 1000000).toPrecision(3)}M`;
+                            } else if (value <= -1000) {
+                              return `${(value / 1000).toPrecision(3)}K`;
+                            }
+                            return value.toString();
+                          }}
+                          width={30}
+                          stroke="var(--color-orange-500)"
+                          tick={{}}
+                        />
+                        {/* Left Y axis */}
+                        <YAxis
+                          yAxisId="left"
+                          orientation="left"
+                          tickFormatter={(value: number) => {
+                            if (value >= 1000000) {
+                              return `${(value / 1000000).toPrecision(3)}M`;
+                            } else if (value >= 1000) {
+                              return `${(value / 1000).toPrecision(3)}K`;
+                            }
+                            return value.toString();
+                          }}
+                          width={30}
+                          stroke="var(--color-red-600)"
+                        />
+                        <ChartTooltip content={tooltipRenderer} />
+                        <defs>
+                          <linearGradient
+                            id="fillBalance"
+                            x1="0"
+                            y1="0"
+                            x2="0"
+                            y2="1"
+                          >
+                            <stop
+                              offset="5%"
+                              stopColor="var(--color-orange-500)"
+                              stopOpacity={0.8}
+                            />
+                            <stop
+                              offset="95%"
+                              stopColor="var(--color-orange-500)"
+                              stopOpacity={0.1}
+                            />
+                          </linearGradient>
+                        </defs>
+                        <Area
+                          type="monotone"
+                          dataKey="balance"
+                          name="balance"
+                          stroke="var(--color-orange-500)"
+                          fill="url(#fillBalance)"
+                          fillOpacity={0.9}
+                          activeDot={{ r: 6 }}
+                          yAxisId={"right"}
+                          stackId={"a"}
+                        />
+                        <Area
+                          type="step"
+                          dataKey="monthlyAllowance"
+                          name="allowance"
+                          stroke="var(--color-red-600)"
+                          fill="none"
+                          activeDot={{ r: 6 }}
+                          yAxisId="left"
+                        />
+                        {result.fireNumber && (
+                          <ReferenceLine
+                            y={result.fireNumber}
+                            stroke="var(--primary)"
+                            strokeWidth={2}
+                            strokeDasharray="2 1"
+                            label={{
+                              value: "FIRE Number",
+                              position: "insideBottomRight",
+                            }}
+                            yAxisId={"right"}
+                          />
+                        )}
+                        {result.fireNumber4percent && showing4percent && (
+                          <ReferenceLine
+                            y={result.fireNumber4percent}
+                            stroke="var(--secondary)"
+                            strokeWidth={1}
+                            strokeDasharray="1 1"
+                            label={{
+                              value: "4%-Rule FIRE Number",
+                              position: "insideBottomLeft",
+                            }}
+                            yAxisId={"right"}
+                          />
+                        )}
+                        <ReferenceLine
+                          x={
+                            irlYear +
+                            (Number(form.getValues("retirementAge")) -
+                              Number(form.getValues("currentAge")))
+                          }
+                          stroke="var(--primary)"
+                          strokeWidth={2}
+                          label={{
+                            value: "Retirement",
+                            position: "insideTopRight",
+                          }}
+                          yAxisId={"left"}
+                        />
+                        {result.retirementAge4percent && showing4percent && (
+                          <ReferenceLine
+                            x={
+                              irlYear +
+                              (result.retirementAge4percent -
+                                Number(form.getValues("currentAge")))
+                            }
+                            stroke="var(--secondary)"
+                            strokeWidth={1}
+                            label={{
+                              value: "4%-Rule Retirement",
+                              position: "insideBottomLeft",
+                            }}
+                            yAxisId={"left"}
+                          />
+                        )}
+                      </AreaChart>
+                    </ChartContainer>
+                  </CardContent>
+                </Card>
+              )}
+              {result && (
+                <Button
+                  onClick={() => setShowing4percent(!showing4percent)}
+                  variant={showing4percent ? "secondary" : "default"}
+                  size={"sm"}
+                >
+                  {showing4percent ? "Hide" : "Show"} 4%-Rule
+                </Button>
+              )}
+            </form>
+          </Form>
+        </CardContent>
+      </Card>
+
+      {result && (
+        <div className="mb-4 grid grid-cols-1 gap-2 md:grid-cols-2">
+          {result.error ? (
+            <Card className="col-span-full">
+              <CardContent className="pt-6">
+                <p className="text-destructive">{result.error}</p>
+              </CardContent>
+            </Card>
+          ) : (
+            <>
+              <Card>
+                <CardHeader>
+                  <CardTitle>FIRE Number</CardTitle>
+                  <CardDescription className="text-xs">
+                    Capital at retirement
+                  </CardDescription>
+                </CardHeader>
+                <CardContent>
+                  <p className="text-3xl font-bold">
+                    {formatNumber(result.fireNumber)}
+                  </p>
+                </CardContent>
+              </Card>
+
+              <Card>
+                <CardHeader>
+                  <CardTitle>Retirement Duration</CardTitle>
+                  <CardDescription className="text-xs">
+                    Years to enjoy your financial independence
+                  </CardDescription>
+                </CardHeader>
+                <CardContent>
+                  <p className="text-3xl font-bold">
+                    {Number(form.getValues("lifeExpectancy")) -
+                      Number(form.getValues("retirementAge"))}
+                  </p>
+                </CardContent>
+              </Card>
+              {showing4percent && (
+                <>
+                  <Card>
+                    <CardHeader>
+                      <CardTitle>4%-Rule FIRE Number</CardTitle>
+                      <CardDescription className="text-xs">
+                        Capital needed for 4% of it to be greater than your
+                        yearly allowance
+                      </CardDescription>
+                    </CardHeader>
+                    <CardContent>
+                      <p className="text-3xl font-bold">
+                        {formatNumber(result.fireNumber4percent)}
+                      </p>
+                    </CardContent>
+                  </Card>
+
+                  <Card>
+                    <CardHeader>
+                      <CardTitle>4%-Rule Retirement Duration</CardTitle>
+                      <CardDescription className="text-xs">
+                        Years to enjoy your financial independence if you follow
+                        the 4% rule
+                      </CardDescription>
+                    </CardHeader>
+                    <CardContent>
+                      <p className="text-3xl font-bold">
+                        {Number(form.getValues("lifeExpectancy")) -
+                          (result.retirementAge4percent ?? 0)}
+                      </p>
+                    </CardContent>
+                  </Card>
+                </>
+              )}
+            </>
+          )}
+        </div>
+      )}
+    </>
+  );
+}

src/app/components/footer.tsx

@@ -0,0 +1,16 @@
+export default function Footer() {
+  return (
+    <footer className="w-full py-8 text-center text-xs">
+      <p className="text-xs">
+        © {new Date().getFullYear()} InvestingFIRE. All rights reserved.{" "}
+        <a
+          href="https://schulze.network"
+          target="_blank"
+          className="text-primary hover:underline"
+        >
+          Hosting by Schulze.network
+        </a>
+      </p>
+    </footer>
+  );
+}

src/app/components/web-vitals.tsx

@@ -0,0 +1,77 @@
+"use client";
+
+import { usePlausible } from "next-plausible";
+import { useReportWebVitals } from "next/web-vitals";
+interface Metric {
+  /**
+   * The name of the metric (in acronym form).
+   */
+  name: "CLS" | "FCP" | "FID" | "INP" | "LCP" | "TTFB";
+
+  /**
+   * The current value of the metric.
+   */
+  value: number;
+
+  /**
+   * The rating as to whether the metric value is within the "good",
+   * "needs improvement", or "poor" thresholds of the metric.
+   */
+  rating: "good" | "needs-improvement" | "poor";
+
+  /**
+   * The delta between the current value and the last-reported value.
+   * On the first report, `delta` and `value` will always be the same.
+   */
+  delta: number;
+
+  /**
+   * A unique ID representing this particular metric instance. This ID can
+   * be used by an analytics tool to dedupe multiple values sent for the same
+   * metric instance, or to group multiple deltas together and calculate a
+   * total. It can also be used to differentiate multiple different metric
+   * instances sent from the same page, which can happen if the page is
+   * restored from the back/forward cache (in that case new metrics object
+   * get created).
+   */
+  id: string;
+
+  /**
+   * Any performance entries relevant to the metric value calculation.
+   * The array may also be empty if the metric value was not based on any
+   * entries (e.g. a CLS value of 0 given no layout shifts).
+   */
+  entries: PerformanceEntry[];
+
+  /**
+   * The type of navigation.
+   *
+   * This will be the value returned by the Navigation Timing API (or
+   * `undefined` if the browser doesn't support that API), with the following
+   * exceptions:
+   * - 'back-forward-cache': for pages that are restored from the bfcache.
+   * - 'back_forward' is renamed to 'back-forward' for consistency.
+   * - 'prerender': for pages that were prerendered.
+   * - 'restore': for pages that were discarded by the browser and then
+   * restored by the user.
+   */
+  navigationType:
+    | "navigate"
+    | "reload"
+    | "back-forward"
+    | "back-forward-cache"
+    | "prerender"
+    | "restore";
+}
+
+export function WebVitals() {
+  const plausible = usePlausible();
+  useReportWebVitals((metric: Metric) => {
+    plausible("web-vitals", {
+      props: {
+        [metric.name]: metric.rating,
+      },
+    });
+  });
+  return <></>;
+}

src/app/icon0.svg

@@ -0,0 +1 @@
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src/app/layout.tsx

@@ -0,0 +1,41 @@
+import "@/styles/globals.css";
+import PlausibleProvider from "next-plausible";
+import { type Metadata, type Viewport } from "next";
+import { Geist } from "next/font/google";
+import { WebVitals } from "./components/web-vitals";
+
+export const viewport: Viewport = {
+  themeColor: [{ color: "oklch(0.97 0.0228 95.96)" }],
+};
+
+export const metadata: Metadata = {
+  title: "InvestingFIRE | Finance and Retirement Calculator",
+  description:
+    "Achieve Financial Independence & Early Retirement! Plan your FIRE journey with the InvestingFIRE calculator and get personalized projections in buttersmooth graphs.",
+};
+
+const geist = Geist({
+  subsets: ["latin"],
+  variable: "--font-geist-sans",
+});
+
+export default function RootLayout({
+  children,
+}: Readonly<{ children: React.ReactNode }>) {
+  return (
+    <html lang="en" className={geist.variable}>
+      <head>
+        <meta name="apple-mobile-web-app-title" content="FIRE" />
+        <PlausibleProvider
+          domain="investingfire.com"
+          customDomain="https://analytics.schulze.network"
+          selfHosted={true}
+          enabled={true}
+          trackOutboundLinks={true}
+        />
+      </head>
+      <WebVitals />
+      <body>{children}</body>
+    </html>
+  );
+}

src/app/manifest.json

@@ -0,0 +1,21 @@
+{
+  "name": "InvestingFIRE",
+  "short_name": "FIRE",
+  "icons": [
+    {
+      "src": "/web-app-manifest-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "maskable"
+    },
+    {
+      "src": "/web-app-manifest-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    }
+  ],
+  "theme_color": "#fdf2e4",
+  "background_color": "#fdf2e4",
+  "display": "standalone"
+}

src/app/page.tsx

@@ -0,0 +1,396 @@
+import Image from "next/image";
+import FireCalculatorForm from "./components/FireCalculatorForm";
+import {
+  Accordion,
+  AccordionContent,
+  AccordionItem,
+  AccordionTrigger,
+} from "@/components/ui/accordion";
+import Footer from "./components/footer";
+import BackgroundPattern from "./components/BackgroundPattern";
+
+export default function HomePage() {
+  return (
+    <main className="text-primary-foreground to-destructive from-secondary flex min-h-screen flex-col items-center bg-gradient-to-b p-2">
+      <BackgroundPattern />
+      <div className="z-10 mx-auto flex flex-col items-center justify-center gap-4 text-center">
+        <div className="mt-8 flex flex-row flex-wrap items-center justify-center gap-4 align-middle">
+          <Image
+            priority
+            unoptimized
+            src="/investingfire_logo_no-bg.svg"
+            alt="InvestingFIRE Logo"
+            width={100}
+            height={100}
+          />
+          <h1 className="from-primary via-primary-foreground to-primary bg-gradient-to-r bg-clip-text text-5xl font-extrabold tracking-tight text-transparent drop-shadow-md sm:text-[5rem]">
+            InvestingFIRE
+          </h1>
+        </div>
+        <p className="text-primary-foreground/90 text-xl font-semibold md:text-2xl">
+          The #1 FIRE Calculator
+        </p>
+        <div className="mt-8 w-full max-w-2xl">
+          <FireCalculatorForm />
+        </div>
+      </div>
+
+      {/* Added SEO Content Sections */}
+      <div className="z-10 mx-auto max-w-2xl py-12 text-left">
+        <section className="mb-12">
+          <h2 className="mb-4 text-3xl font-bold">
+            What Is FIRE? Understanding Financial Independence and Early
+            Retirement
+          </h2>
+          <p className="mb-4 text-lg leading-relaxed">
+            FIRE stands for{" "}
+            <strong>Financial Independence, Retire Early</strong>. It&apos;s a
+            lifestyle movement built around two core ideas:
+          </p>
+          <ul className="mb-4 ml-6 list-disc space-y-2 text-lg">
+            <li>
+              <strong>Aggressive saving & investing</strong>—often 50%+ of
+              income—so your capital grows rapidly.
+            </li>
+            <li>
+              <strong>Passive-income coverage</strong>—when your investment
+              returns exceed your living expenses, you gain freedom from a
+              traditional 9-5.
+            </li>
+          </ul>
+          <p className="text-lg leading-relaxed">
+            By reaching your personal <em>FIRE Number</em>—the nest egg needed
+            to cover your inflation-adjusted spending—you unlock the option to
+            step away from a daily paycheck and pursue passion projects, travel,
+            family, or anything else. This calculator helps you simulate your
+            journey, estimate how much you need, and visualize both your
+            accumulation phase and your retirement withdrawals over time.
+          </p>
+        </section>
+
+        <section className="mb-12">
+          <h2 className="mb-4 text-3xl font-bold">
+            How This FIRE Calculator Provides Investing Insights
+          </h2>
+          <p className="mb-4 text-lg leading-relaxed">
+            Our interactive tool goes beyond a simple “25x annual spending”
+            rule. It runs a <strong>year-by-year simulation</strong> of your
+            portfolio, combining:
+          </p>
+          <ul className="mb-4 ml-6 list-disc space-y-2 text-lg">
+            <li>
+              <strong>Starting Capital</strong>—your current invested balance
+            </li>
+            <li>
+              <strong>Monthly Savings</strong>—ongoing contributions to your
+              portfolio
+            </li>
+            <li>
+              <strong>Expected Annual Growth Rate (CAGR)</strong>—compounding
+              returns before inflation
+            </li>
+            <li>
+              <strong>Annual Inflation Rate</strong>—to inflate your target
+              withdrawal each year
+            </li>
+            <li>
+              <strong>Desired Monthly Allowance</strong>—today&apos;s-value
+              spending goal
+            </li>
+            <li>
+              <strong>Retirement Age & Life Expectancy</strong>—defines your
+              accumulation horizon and payout period
+            </li>
+          </ul>
+          <p className="text-lg leading-relaxed">Key features:</p>
+          <ul className="mb-4 ml-6 list-disc space-y-2 text-lg">
+            <li>
+              <strong>Real-time calculation</strong>—as you tweak any input,
+              your FIRE Number and chart update instantly.
+            </li>
+            <li>
+              <strong>Interactive chart</strong> with area plots for both{" "}
+              <em>portfolio balance</em> and{" "}
+              <em>inflation-adjusted allowance</em>, plus reference lines
+              showing your retirement date and required FIRE Number.
+            </li>
+            <li>
+              <strong>Custom simulation</strong>—switches from accumulation
+              (adding savings) to retirement (withdrawing allowance),
+              compounding each year based on your growth rate.
+            </li>
+          </ul>
+          <p className="text-lg leading-relaxed">
+            With this level of granularity, you can confidently experiment with
+            savings rate, target retirement age, and investment assumptions to
+            discover how small tweaks speed up or delay your path to financial
+            independence.
+          </p>
+        </section>
+
+        <section className="mb-12">
+          <h2 className="mb-4 text-3xl font-bold">
+            FIRE & Investing Frequently Asked Questions (FAQ)
+          </h2>
+          <Accordion type="single" collapsible className="w-full">
+            <AccordionItem value="item-1">
+              <AccordionTrigger className="text-xl font-semibold">
+                What methodology does this calculator use?
+              </AccordionTrigger>
+              <AccordionContent className="text-lg leading-relaxed">
+                We run a multi-year projection in two phases:
+                <ol className="ml-6 list-decimal space-y-1">
+                  <li>
+                    <strong>Accumulation:</strong> Your balance grows by CAGR
+                    and you add monthly savings.
+                  </li>
+                  <li>
+                    <strong>Retirement:</strong> The balance continues
+                    compounding, but you withdraw an inflation-adjusted monthly
+                    allowance.
+                  </li>
+                </ol>
+                The result: a precise estimate of the capital you&apos;ll have
+                at retirement (your “FIRE Number”) and how long it will last
+                until your chosen life expectancy.
+              </AccordionContent>
+            </AccordionItem>
+
+            <AccordionItem value="item-2">
+              <AccordionTrigger className="text-xl font-semibold">
+                Why isn&apos;t this just the 4% rule?
+              </AccordionTrigger>
+              <AccordionContent className="text-lg leading-relaxed">
+                The 4% rule is a useful starting point (25× annual spending),
+                but it assumes a fixed withdrawal rate with inflation
+                adjustments and doesn&apos;t model ongoing savings or dynamic
+                market returns. Our calculator simulates each year&apos;s
+                growth, contributions, and inflation-indexed withdrawals to give
+                you a tailored picture.
+              </AccordionContent>
+            </AccordionItem>
+
+            <AccordionItem value="item-3">
+              <AccordionTrigger className="text-xl font-semibold">
+                How do I choose a realistic growth rate?
+              </AccordionTrigger>
+              <AccordionContent className="text-lg leading-relaxed">
+                Historically, a diversified portfolio of equities and bonds has
+                returned around 7-10% per year before inflation. We recommend
+                starting around 6-8% (net of fees), then running “what-if”
+                scenarios—5% on the conservative side, 10% on the aggressive
+                side—to see how they affect your timeline.
+              </AccordionContent>
+            </AccordionItem>
+
+            <AccordionItem value="item-4">
+              <AccordionTrigger className="text-xl font-semibold">
+                How does inflation factor into my FIRE Number?
+              </AccordionTrigger>
+              <AccordionContent className="text-lg leading-relaxed">
+                Cost of living rises. To maintain today&apos;s lifestyle, your
+                monthly allowance must grow each year by your inflation rate.
+                This calculator automatically inflates your desired monthly
+                spending and subtracts it from your portfolio during retirement,
+                ensuring your FIRE Number keeps pace with rising expenses.
+              </AccordionContent>
+            </AccordionItem>
+
+            <AccordionItem value="item-5">
+              <AccordionTrigger className="text-xl font-semibold">
+                Can I really retire early with FIRE?
+              </AccordionTrigger>
+              <AccordionContent className="text-lg leading-relaxed">
+                Early retirement is achievable with disciplined saving, smart
+                investing, and realistic assumptions. This tool helps you set
+                targets, visualize outcomes, and adjust inputs—so you can build
+                confidence in your plan and make informed trade-offs between
+                lifestyle, risk, and timeline.
+              </AccordionContent>
+            </AccordionItem>
+
+            <AccordionItem value="item-6">
+              <AccordionTrigger className="text-xl font-semibold">
+                How should I use this calculator effectively?
+              </AccordionTrigger>
+              <AccordionContent className="text-lg leading-relaxed">
+                <ul className="ml-6 list-disc space-y-1">
+                  <li>
+                    Start with your actual numbers (capital, savings, age).
+                  </li>
+                  <li>
+                    Set conservative - mid - aggressive growth rates to bound
+                    possibilities.
+                  </li>
+                  <li>
+                    Slide your retirement age to explore “early” vs.
+                    “traditional” scenarios.
+                  </li>
+                  <li>
+                    Review the chart—especially the reference lines—to see when
+                    you hit FI and how withdrawals impact your balance.
+                  </li>
+                  <li>
+                    Experiment with higher savings rates or lower target
+                    spending to accelerate your path.
+                  </li>
+                </ul>
+              </AccordionContent>
+            </AccordionItem>
+          </Accordion>
+        </section>
+
+        {/* Optional: Add a section for relevant resources/links here */}
+        <section className="mb-12">
+          <h2 className="mb-4 text-3xl font-bold">
+            FIRE Journey & Investing Resources
+          </h2>
+          <p className="mb-6 text-lg leading-relaxed">
+            Ready to deepen your knowledge and build a bullet-proof plan? Below
+            are some of our favorite blogs, books, tools, and communities for
+            financial independence and smart investing.
+          </p>
+
+          <div className="bg-foreground my-8 rounded-md p-4 text-lg">
+            <p className="font-semibold">Getting Started with FIRE:</p>
+            <ol className="ml-6 list-decimal space-y-1">
+              <li>
+                Run your first projection above to find your target FIRE Number.
+              </li>
+              <li>Identify areas to boost savings or reduce expenses.</li>
+              <li>
+                Study index-fund strategies and low-cost investing advice.
+              </li>
+              <li>
+                Join{" "}
+                <a
+                  href="https://www.reddit.com/r/Fire/"
+                  target="_blank"
+                  className="text-primary hover:underline"
+                >
+                  supportive communities like r/Fire
+                </a>{" "}
+                to learn from real journeys.
+              </li>
+            </ol>
+          </div>
+
+          <div className="grid gap-8 md:grid-cols-2">
+            <div>
+              <h3 className="mb-3 text-xl font-semibold">Blogs & Websites</h3>
+              <ul className="ml-6 list-disc space-y-2 text-lg">
+                <li>
+                  <a
+                    href="https://www.mrmoneymustache.com/"
+                    target="_blank"
+                    className="text-primary hover:underline"
+                  >
+                    Mr. Money Mustache
+                  </a>{" "}
+                  - Hardcore frugality & early retirement success stories.
+                </li>
+                <li>
+                  <a
+                    href="https://www.playingwithfire.co/"
+                    target="_blank"
+                    className="text-primary hover:underline"
+                  >
+                    Playing With FIRE
+                  </a>{" "}
+                  - Community resources & real-life case studies.
+                </li>
+                <li>
+                  <a
+                    href="https://www.reddit.com/r/Fire/"
+                    target="_blank"
+                    className="text-primary hover:underline"
+                  >
+                    r/Fire
+                  </a>{" "}
+                  - Active forum for questions, tips, and support.
+                </li>
+              </ul>
+            </div>
+
+            <div>
+              <h3 className="mb-3 text-xl font-semibold">Books & Podcasts</h3>
+              <ul className="ml-6 list-disc space-y-2 text-lg">
+                <li>
+                  <a
+                    href="https://www.amazon.com/Your-Money-Life-Transforming-Relationship/dp/0143115766"
+                    target="_blank"
+                    className="text-primary hover:underline"
+                  >
+                    Your Money or Your Life
+                  </a>{" "}
+                  - The classic guide to aligning money with values.
+                </li>
+                <li>
+                  <a
+                    href="https://podcasts.apple.com/us/podcast/biggerpockets-money-podcast/id1330225136"
+                    target="_blank"
+                    className="text-primary hover:underline"
+                  >
+                    BiggerPockets Money Podcast
+                  </a>{" "}
+                  - Interviews on FIRE strategies and wealth building.
+                </li>
+                <li>
+                  <a
+                    href="https://podcasts.apple.com/us/podcast/can-you-retire-now-this-fire-calculator-will-tell-you/id1330225136?i=1000683436292"
+                    target="_blank"
+                    className="text-primary hover:underline"
+                  >
+                    InvestingFIRE Calculator Demo
+                  </a>{" "}
+                  - Deep dive on how interactive projections can guide your
+                  plan.
+                </li>
+              </ul>
+            </div>
+
+            <div>
+              <h3 className="mb-3 text-xl font-semibold">
+                Additional Calculators & Tools
+              </h3>
+              <ul className="ml-6 list-disc space-y-2 text-lg">
+                <li>
+                  <a
+                    href="https://ghostfol.io"
+                    target="_blank"
+                    className="text-primary hover:underline"
+                  >
+                    Ghostfolio
+                  </a>{" "}
+                  - Wealth management application for individuals.
+                </li>
+                <li>
+                  <a
+                    href="https://walletburst.com/tools/coast-fire-calculator/"
+                    target="_blank"
+                    className="text-primary hover:underline"
+                  >
+                    Coast FIRE Calculator
+                  </a>{" "}
+                  - When you “max out” early contributions but let compounding
+                  do the rest.
+                </li>
+                <li>
+                  <a
+                    href="https://www.investor.gov/financial-tools-calculators/calculators/compound-interest-calculator"
+                    target="_blank"
+                    className="text-primary hover:underline"
+                  >
+                    Compound Interest Calculator
+                  </a>{" "}
+                  - Explore the power of growth rates in isolation.
+                </li>
+              </ul>
+            </div>
+          </div>
+        </section>
+      </div>
+      <Footer />
+    </main>
+  );
+}

src/app/robots.ts

@@ -0,0 +1,11 @@
+import type { MetadataRoute } from "next";
+
+export default function robots(): MetadataRoute.Robots {
+  return {
+    rules: {
+      userAgent: "*",
+      allow: "/",
+    },
+    sitemap: "https://investingfire.com/sitemap.xml",
+  };
+}

src/app/sitemap.ts

@@ -0,0 +1,13 @@
+import { BASE_URL } from "@/lib/constants";
+import { type MetadataRoute } from "next";
+
+export default function sitemap(): MetadataRoute.Sitemap {
+  return [
+    {
+      url: BASE_URL,
+      lastModified: new Date(),
+      changeFrequency: "yearly",
+      priority: 1,
+    },
+  ];
+}

src/components/ui/accordion.tsx

@@ -0,0 +1,69 @@
+"use client";
+
+import * as React from "react";
+import * as AccordionPrimitive from "@radix-ui/react-accordion";
+import { ChevronDownIcon } from "lucide-react";
+
+import { cn } from "@/lib/utils";
+
+function Accordion({
+  ...props
+}: React.ComponentProps<typeof AccordionPrimitive.Root>) {
+  return <AccordionPrimitive.Root data-slot="accordion" {...props} />;
+}
+
+function AccordionItem({
+  className,
+  ...props
+}: React.ComponentProps<typeof AccordionPrimitive.Item>) {
+  return (
+    <AccordionPrimitive.Item
+      data-slot="accordion-item"
+      className={cn(
+        "border-primary-foreground/20 border-b last:border-b-0",
+        className,
+      )}
+      {...props}
+    />
+  );
+}
+
+function AccordionTrigger({
+  className,
+  children,
+  ...props
+}: React.ComponentProps<typeof AccordionPrimitive.Trigger>) {
+  return (
+    <AccordionPrimitive.Header className="flex">
+      <AccordionPrimitive.Trigger
+        data-slot="accordion-trigger"
+        className={cn(
+          "focus-visible:border-ring focus-visible:ring-ring/50 flex flex-1 items-start justify-between gap-4 rounded-md py-4 text-left text-sm font-medium transition-all outline-none hover:underline focus-visible:ring-[3px] disabled:pointer-events-none disabled:opacity-50 [&[data-state=open]>svg]:rotate-180",
+          className,
+        )}
+        {...props}
+      >
+        {children}
+        <ChevronDownIcon className="text-primary-foreground pointer-events-none size-4 shrink-0 translate-y-0.5 transition-transform duration-200" />
+      </AccordionPrimitive.Trigger>
+    </AccordionPrimitive.Header>
+  );
+}
+
+function AccordionContent({
+  className,
+  children,
+  ...props
+}: React.ComponentProps<typeof AccordionPrimitive.Content>) {
+  return (
+    <AccordionPrimitive.Content
+      data-slot="accordion-content"
+      className="data-[state=closed]:animate-accordion-up data-[state=open]:animate-accordion-down overflow-hidden text-sm"
+      {...props}
+    >
+      <div className={cn("pt-0 pb-4", className)}>{children}</div>
+    </AccordionPrimitive.Content>
+  );
+}
+
+export { Accordion, AccordionItem, AccordionTrigger, AccordionContent };

src/components/ui/chart.tsx

@@ -0,0 +1,357 @@
+/* eslint-disable @typescript-eslint/no-unsafe-assignment */
+"use client";
+
+import * as React from "react";
+import * as RechartsPrimitive from "recharts";
+
+import { cn } from "@/lib/utils";
+
+// Format: { THEME_NAME: CSS_SELECTOR }
+const THEMES = { light: "", dark: ".dark" } as const;
+
+export type ChartConfig = Record<
+  string,
+  {
+    label?: React.ReactNode;
+    icon?: React.ComponentType;
+  } & (
+    | { color?: string; theme?: never }
+    | { color?: never; theme: Record<keyof typeof THEMES, string> }
+  )
+>;
+
+type ChartContextProps = {
+  config: ChartConfig;
+};
+
+const ChartContext = React.createContext<ChartContextProps | null>(null);
+
+function useChart() {
+  const context = React.useContext(ChartContext);
+
+  if (!context) {
+    throw new Error("useChart must be used within a <ChartContainer />");
+  }
+
+  return context;
+}
+
+function ChartContainer({
+  id,
+  className,
+  children,
+  config,
+  ...props
+}: React.ComponentProps<"div"> & {
+  config: ChartConfig;
+  children: React.ComponentProps<
+    typeof RechartsPrimitive.ResponsiveContainer
+  >["children"];
+}) {
+  const uniqueId = React.useId();
+  const chartId = `chart-${id ?? uniqueId.replace(/:/g, "")}`;
+
+  return (
+    <ChartContext.Provider value={{ config }}>
+      <div
+        data-slot="chart"
+        data-chart={chartId}
+        className={cn(
+          "[&_.recharts-cartesian-axis-tick_text]:fill-muted-foreground [&_.recharts-cartesian-grid_line[stroke='#ccc']]:stroke-border/50 [&_.recharts-curve.recharts-tooltip-cursor]:stroke-border [&_.recharts-polar-grid_[stroke='#ccc']]:stroke-border [&_.recharts-radial-bar-background-sector]:fill-muted [&_.recharts-rectangle.recharts-tooltip-cursor]:fill-muted [&_.recharts-reference-line_[stroke='#ccc']]:stroke-border flex aspect-video justify-center text-xs [&_.recharts-dot[stroke='#fff']]:stroke-transparent [&_.recharts-layer]:outline-hidden [&_.recharts-sector]:outline-hidden [&_.recharts-sector[stroke='#fff']]:stroke-transparent [&_.recharts-surface]:outline-hidden",
+          className,
+        )}
+        {...props}
+      >
+        <ChartStyle id={chartId} config={config} />
+        <RechartsPrimitive.ResponsiveContainer>
+          {children}
+        </RechartsPrimitive.ResponsiveContainer>
+      </div>
+    </ChartContext.Provider>
+  );
+}
+
+const ChartStyle = ({ id, config }: { id: string; config: ChartConfig }) => {
+  const colorConfig = Object.entries(config).filter(
+    ([, config]) => config.theme ?? config.color,
+  );
+
+  if (!colorConfig.length) {
+    return null;
+  }
+
+  return (
+    <style
+      dangerouslySetInnerHTML={{
+        __html: Object.entries(THEMES)
+          .map(
+            ([theme, prefix]) => `
+${prefix} [data-chart=${id}] {
+${colorConfig
+  .map(([key, itemConfig]) => {
+    const color =
+      itemConfig.theme?.[theme as keyof typeof itemConfig.theme] ??
+      itemConfig.color;
+    return color ? `  --color-${key}: ${color};` : null;
+  })
+  .join("\n")}
+}
+`,
+          )
+          .join("\n"),
+      }}
+    />
+  );
+};
+
+const ChartTooltip = RechartsPrimitive.Tooltip;
+
+function ChartTooltipContent({
+  active,
+  payload,
+  className,
+  indicator = "dot",
+  hideLabel = false,
+  hideIndicator = false,
+  label,
+  labelFormatter,
+  labelClassName,
+  formatter,
+  color,
+  nameKey,
+  labelKey,
+}: React.ComponentProps<typeof RechartsPrimitive.Tooltip> &
+  React.ComponentProps<"div"> & {
+    hideLabel?: boolean;
+    hideIndicator?: boolean;
+    indicator?: "line" | "dot" | "dashed";
+    nameKey?: string;
+    labelKey?: string;
+  }) {
+  const { config } = useChart();
+
+  const tooltipLabel = React.useMemo(() => {
+    if (hideLabel || !payload?.length) {
+      return null;
+    }
+
+    const [item] = payload;
+    const key = `${labelKey ?? item?.dataKey ?? item?.name ?? "value"}`;
+    const itemConfig = getPayloadConfigFromPayload(config, item, key);
+    const value =
+      !labelKey && typeof label === "string"
+        ? (config[label]?.label ?? label)
+        : itemConfig?.label;
+
+    if (labelFormatter) {
+      return (
+        <div className={cn("font-medium", labelClassName)}>
+          {labelFormatter(value, payload)}
+        </div>
+      );
+    }
+
+    if (!value) {
+      return null;
+    }
+
+    return <div className={cn("font-medium", labelClassName)}>{value}</div>;
+  }, [
+    label,
+    labelFormatter,
+    payload,
+    hideLabel,
+    labelClassName,
+    config,
+    labelKey,
+  ]);
+
+  if (!active || !payload?.length) {
+    return null;
+  }
+
+  const nestLabel = payload.length === 1 && indicator !== "dot";
+
+  return (
+    <div
+      className={cn(
+        "border-border/50 bg-background grid min-w-[8rem] items-start gap-1.5 rounded-lg border px-2.5 py-1.5 text-xs shadow-xl",
+        className,
+      )}
+    >
+      {!nestLabel ? tooltipLabel : null}
+      <div className="grid gap-1.5">
+        {payload.map((item, index) => {
+          const key = `${nameKey ?? item.name ?? item.dataKey ?? "value"}`;
+          const itemConfig = getPayloadConfigFromPayload(config, item, key);
+          const indicatorColor: string | undefined =
+            // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+            color ?? item.payload.fill ?? item.color;
+
+          return (
+            <div
+              key={item.dataKey}
+              className={cn(
+                "[&>svg]:text-muted-foreground flex w-full flex-wrap items-stretch gap-2 [&>svg]:h-2.5 [&>svg]:w-2.5",
+                indicator === "dot" && "items-center",
+              )}
+            >
+              {formatter && item?.value !== undefined && item.name ? (
+                // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+                formatter(item.value, item.name, item, index, item.payload)
+              ) : (
+                <>
+                  {itemConfig?.icon ? (
+                    <itemConfig.icon />
+                  ) : (
+                    !hideIndicator && (
+                      <div
+                        className={cn(
+                          "shrink-0 rounded-[2px] border-(--color-border) bg-(--color-bg)",
+                          {
+                            "h-2.5 w-2.5": indicator === "dot",
+                            "w-1": indicator === "line",
+                            "w-0 border-[1.5px] border-dashed bg-transparent":
+                              indicator === "dashed",
+                            "my-0.5": nestLabel && indicator === "dashed",
+                          },
+                        )}
+                        style={
+                          {
+                            "--color-bg": indicatorColor,
+                            "--color-border": indicatorColor,
+                          } as React.CSSProperties
+                        }
+                      />
+                    )
+                  )}
+                  <div
+                    className={cn(
+                      "flex flex-1 justify-between leading-none",
+                      nestLabel ? "items-end" : "items-center",
+                    )}
+                  >
+                    <div className="grid gap-1.5">
+                      {nestLabel ? tooltipLabel : null}
+                      <span className="text-muted-foreground">
+                        {itemConfig?.label ?? item.name}
+                      </span>
+                    </div>
+                    {item.value && (
+                      <span className="text-foreground font-mono font-medium tabular-nums">
+                        {item.value.toLocaleString()}
+                      </span>
+                    )}
+                  </div>
+                </>
+              )}
+            </div>
+          );
+        })}
+      </div>
+    </div>
+  );
+}
+
+const ChartLegend = RechartsPrimitive.Legend;
+
+function ChartLegendContent({
+  className,
+  hideIcon = false,
+  payload,
+  verticalAlign = "bottom",
+  nameKey,
+}: React.ComponentProps<"div"> &
+  Pick<RechartsPrimitive.LegendProps, "payload" | "verticalAlign"> & {
+    hideIcon?: boolean;
+    nameKey?: string;
+  }) {
+  const { config } = useChart();
+
+  if (!payload?.length) {
+    return null;
+  }
+
+  return (
+    <div
+      className={cn(
+        "flex items-center justify-center gap-4",
+        verticalAlign === "top" ? "pb-3" : "pt-3",
+        className,
+      )}
+    >
+      {payload.map((item) => {
+        // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
+        const key = `${nameKey ?? item.dataKey ?? "value"}`;
+        const itemConfig = getPayloadConfigFromPayload(config, item, key);
+
+        return (
+          <div
+            key={item.value}
+            className={cn(
+              "[&>svg]:text-muted-foreground flex items-center gap-1.5 [&>svg]:h-3 [&>svg]:w-3",
+            )}
+          >
+            {itemConfig?.icon && !hideIcon ? (
+              <itemConfig.icon />
+            ) : (
+              <div
+                className="h-2 w-2 shrink-0 rounded-[2px]"
+                style={{
+                  backgroundColor: item.color,
+                }}
+              />
+            )}
+            {itemConfig?.label}
+          </div>
+        );
+      })}
+    </div>
+  );
+}
+
+// Helper to extract item config from a payload.
+function getPayloadConfigFromPayload(
+  config: ChartConfig,
+  payload: unknown,
+  key: string,
+) {
+  if (typeof payload !== "object" || payload === null) {
+    return undefined;
+  }
+
+  const payloadPayload =
+    "payload" in payload &&
+    typeof payload.payload === "object" &&
+    payload.payload !== null
+      ? payload.payload
+      : undefined;
+
+  let configLabelKey: string = key;
+
+  if (
+    key in payload &&
+    typeof payload[key as keyof typeof payload] === "string"
+  ) {
+    configLabelKey = payload[key as keyof typeof payload] as string;
+  } else if (
+    payloadPayload &&
+    key in payloadPayload &&
+    typeof payloadPayload[key as keyof typeof payloadPayload] === "string"
+  ) {
+    configLabelKey = payloadPayload[
+      key as keyof typeof payloadPayload
+    ] as string;
+  }
+
+  return configLabelKey in config ? config[configLabelKey] : config[key];
+}
+
+export {
+  ChartContainer,
+  ChartTooltip,
+  ChartTooltipContent,
+  ChartLegend,
+  ChartLegendContent,
+  ChartStyle,
+};

src/components/ui/select.tsx

@@ -0,0 +1,185 @@
+"use client";
+
+import * as React from "react";
+import * as SelectPrimitive from "@radix-ui/react-select";
+import { CheckIcon, ChevronDownIcon, ChevronUpIcon } from "lucide-react";
+
+import { cn } from "@/lib/utils";
+
+function Select({
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Root>) {
+  return <SelectPrimitive.Root data-slot="select" {...props} />;
+}
+
+function SelectGroup({
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Group>) {
+  return <SelectPrimitive.Group data-slot="select-group" {...props} />;
+}
+
+function SelectValue({
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Value>) {
+  return <SelectPrimitive.Value data-slot="select-value" {...props} />;
+}
+
+function SelectTrigger({
+  className,
+  size = "default",
+  children,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Trigger> & {
+  size?: "sm" | "default";
+}) {
+  return (
+    <SelectPrimitive.Trigger
+      data-slot="select-trigger"
+      data-size={size}
+      className={cn(
+        "border-input data-[placeholder]:text-muted-foreground [&_svg:not([class*='text-'])]:text-muted-foreground focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:bg-input/30 dark:hover:bg-input/50 flex w-fit items-center justify-between gap-2 rounded-md border bg-transparent px-3 py-2 text-sm whitespace-nowrap shadow-xs transition-[color,box-shadow] outline-none focus-visible:ring-[3px] disabled:cursor-not-allowed disabled:opacity-50 data-[size=default]:h-9 data-[size=sm]:h-8 *:data-[slot=select-value]:line-clamp-1 *:data-[slot=select-value]:flex *:data-[slot=select-value]:items-center *:data-[slot=select-value]:gap-2 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className,
+      )}
+      {...props}
+    >
+      {children}
+      <SelectPrimitive.Icon asChild>
+        <ChevronDownIcon className="size-4 opacity-50" />
+      </SelectPrimitive.Icon>
+    </SelectPrimitive.Trigger>
+  );
+}
+
+function SelectContent({
+  className,
+  children,
+  position = "popper",
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Content>) {
+  return (
+    <SelectPrimitive.Portal>
+      <SelectPrimitive.Content
+        data-slot="select-content"
+        className={cn(
+          "bg-popover text-popover-foreground data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 relative z-50 max-h-(--radix-select-content-available-height) min-w-[8rem] origin-(--radix-select-content-transform-origin) overflow-x-hidden overflow-y-auto rounded-md border shadow-md",
+          position === "popper" &&
+            "data-[side=bottom]:translate-y-1 data-[side=left]:-translate-x-1 data-[side=right]:translate-x-1 data-[side=top]:-translate-y-1",
+          className,
+        )}
+        position={position}
+        {...props}
+      >
+        <SelectScrollUpButton />
+        <SelectPrimitive.Viewport
+          className={cn(
+            "p-1",
+            position === "popper" &&
+              "h-[var(--radix-select-trigger-height)] w-full min-w-[var(--radix-select-trigger-width)] scroll-my-1",
+          )}
+        >
+          {children}
+        </SelectPrimitive.Viewport>
+        <SelectScrollDownButton />
+      </SelectPrimitive.Content>
+    </SelectPrimitive.Portal>
+  );
+}
+
+function SelectLabel({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Label>) {
+  return (
+    <SelectPrimitive.Label
+      data-slot="select-label"
+      className={cn("text-muted-foreground px-2 py-1.5 text-xs", className)}
+      {...props}
+    />
+  );
+}
+
+function SelectItem({
+  className,
+  children,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Item>) {
+  return (
+    <SelectPrimitive.Item
+      data-slot="select-item"
+      className={cn(
+        "focus:bg-accent focus:text-accent-foreground [&_svg:not([class*='text-'])]:text-muted-foreground relative flex w-full cursor-default items-center gap-2 rounded-sm py-1.5 pr-8 pl-2 text-sm outline-hidden select-none data-[disabled]:pointer-events-none data-[disabled]:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4 *:[span]:last:flex *:[span]:last:items-center *:[span]:last:gap-2",
+        className,
+      )}
+      {...props}
+    >
+      <span className="absolute right-2 flex size-3.5 items-center justify-center">
+        <SelectPrimitive.ItemIndicator>
+          <CheckIcon className="size-4" />
+        </SelectPrimitive.ItemIndicator>
+      </span>
+      <SelectPrimitive.ItemText>{children}</SelectPrimitive.ItemText>
+    </SelectPrimitive.Item>
+  );
+}
+
+function SelectSeparator({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Separator>) {
+  return (
+    <SelectPrimitive.Separator
+      data-slot="select-separator"
+      className={cn("bg-border pointer-events-none -mx-1 my-1 h-px", className)}
+      {...props}
+    />
+  );
+}
+
+function SelectScrollUpButton({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.ScrollUpButton>) {
+  return (
+    <SelectPrimitive.ScrollUpButton
+      data-slot="select-scroll-up-button"
+      className={cn(
+        "flex cursor-default items-center justify-center py-1",
+        className,
+      )}
+      {...props}
+    >
+      <ChevronUpIcon className="size-4" />
+    </SelectPrimitive.ScrollUpButton>
+  );
+}
+
+function SelectScrollDownButton({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.ScrollDownButton>) {
+  return (
+    <SelectPrimitive.ScrollDownButton
+      data-slot="select-scroll-down-button"
+      className={cn(
+        "flex cursor-default items-center justify-center py-1",
+        className,
+      )}
+      {...props}
+    >
+      <ChevronDownIcon className="size-4" />
+    </SelectPrimitive.ScrollDownButton>
+  );
+}
+
+export {
+  Select,
+  SelectContent,
+  SelectGroup,
+  SelectItem,
+  SelectLabel,
+  SelectScrollDownButton,
+  SelectScrollUpButton,
+  SelectSeparator,
+  SelectTrigger,
+  SelectValue,
+};

src/components/ui/slider.tsx

@@ -0,0 +1,63 @@
+"use client";
+
+import * as React from "react";
+import * as SliderPrimitive from "@radix-ui/react-slider";
+
+import { cn } from "@/lib/utils";
+
+function Slider({
+  className,
+  defaultValue,
+  value,
+  min = 0,
+  max = 100,
+  ...props
+}: React.ComponentProps<typeof SliderPrimitive.Root>) {
+  const _values = React.useMemo(
+    () =>
+      Array.isArray(value)
+        ? value
+        : Array.isArray(defaultValue)
+          ? defaultValue
+          : [min, max],
+    [value, defaultValue, min, max],
+  );
+
+  return (
+    <SliderPrimitive.Root
+      data-slot="slider"
+      defaultValue={defaultValue}
+      value={value}
+      min={min}
+      max={max}
+      className={cn(
+        "relative flex w-full touch-none items-center select-none data-[disabled]:opacity-50 data-[orientation=vertical]:h-full data-[orientation=vertical]:min-h-44 data-[orientation=vertical]:w-auto data-[orientation=vertical]:flex-col",
+        className,
+      )}
+      {...props}
+    >
+      <SliderPrimitive.Track
+        data-slot="slider-track"
+        className={cn(
+          "bg-muted relative grow overflow-hidden rounded-full data-[orientation=horizontal]:h-1.5 data-[orientation=horizontal]:w-full data-[orientation=vertical]:h-full data-[orientation=vertical]:w-1.5",
+        )}
+      >
+        <SliderPrimitive.Range
+          data-slot="slider-range"
+          className={cn(
+            "bg-primary absolute data-[orientation=horizontal]:h-full data-[orientation=vertical]:w-full",
+          )}
+        />
+      </SliderPrimitive.Track>
+      {Array.from({ length: _values.length }, (_, index) => (
+        <SliderPrimitive.Thumb
+          data-slot="slider-thumb"
+          key={index}
+          className="border-primary bg-background ring-ring/50 block size-4 shrink-0 rounded-full border shadow-sm transition-[color,box-shadow] hover:ring-4 focus-visible:ring-4 focus-visible:outline-hidden disabled:pointer-events-none disabled:opacity-50"
+        />
+      ))}
+    </SliderPrimitive.Root>
+  );
+}
+
+export { Slider };

src/env.js

@@ -0,0 +1,40 @@
+import { createEnv } from "@t3-oss/env-nextjs";
+import { z } from "zod";
+
+export const env = createEnv({
+  /**
+   * Specify your server-side environment variables schema here. This way you can ensure the app
+   * isn't built with invalid env vars.
+   */
+  server: {
+    NODE_ENV: z.enum(["development", "test", "production"]),
+  },
+
+  /**
+   * Specify your client-side environment variables schema here. This way you can ensure the app
+   * isn't built with invalid env vars. To expose them to the client, prefix them with
+   * `NEXT_PUBLIC_`.
+   */
+  client: {
+    // NEXT_PUBLIC_CLIENTVAR: z.string(),
+  },
+
+  /**
+   * You can't destruct `process.env` as a regular object in the Next.js edge runtimes (e.g.
+   * middlewares) or client-side so we need to destruct manually.
+   */
+  runtimeEnv: {
+    NODE_ENV: process.env.NODE_ENV,
+    // NEXT_PUBLIC_CLIENTVAR: process.env.NEXT_PUBLIC_CLIENTVAR,
+  },
+  /**
+   * Run `build` or `dev` with `SKIP_ENV_VALIDATION` to skip env validation. This is especially
+   * useful for Docker builds.
+   */
+  skipValidation: !!process.env.SKIP_ENV_VALIDATION,
+  /**
+   * Makes it so that empty strings are treated as undefined. `SOME_VAR: z.string()` and
+   * `SOME_VAR=''` will throw an error.
+   */
+  emptyStringAsUndefined: true,
+});

src/lib/constants.ts

@@ -0,0 +1 @@
+export const BASE_URL = "https://investingfire.com/";

src/lib/utils.ts

@@ -1,6 +1,6 @@
-import { clsx, type ClassValue } from "clsx"
+import { clsx, type ClassValue } from "clsx";
-import { twMerge } from "tailwind-merge"
+import { twMerge } from "tailwind-merge";
 
 export function cn(...inputs: ClassValue[]) {
-  return twMerge(clsx(inputs))
+  return twMerge(clsx(inputs));
 }

src/styles/globals.css

@@ -4,7 +4,8 @@
 @custom-variant dark (&:is(.dark *));
 
 @theme {
-  --font-sans: var(--font-geist-sans), ui-sans-serif, system-ui, sans-serif,
+  --font-sans:
+    var(--font-geist-sans), ui-sans-serif, system-ui, sans-serif,
     "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
 }
 
@@ -48,71 +49,77 @@
 
 :root {
   --radius: 0.625rem;
-  --background: oklch(1 0 0);
+  --background: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --foreground: oklch(0.145 0 0);
+  --foreground: oklch(0.39 0.0215 96.47); /* black olive */
-  --card: oklch(1 0 0);
+  --card: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --card-foreground: oklch(0.145 0 0);
+  --card-foreground: oklch(0.39 0.0215 96.47); /* black olive */
-  --popover: oklch(1 0 0);
+  --popover: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --popover-foreground: oklch(0.145 0 0);
+  --popover-foreground: oklch(0.39 0.0215 96.47); /* black olive */
-  --primary: oklch(0.205 0 0);
+  --primary: oklch(0.67 0.0763 198.81); /* verdigris */
-  --primary-foreground: oklch(0.985 0 0);
+  --primary-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --secondary: oklch(0.97 0 0);
+  --secondary: oklch(0.49 0.1326 259.29); /* denim */
-  --secondary-foreground: oklch(0.205 0 0);
+  --secondary-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --muted: oklch(0.97 0 0);
+  --muted: oklch(0.67 0.0763 198.81 / 20%); /* verdigris with opacity */
-  --muted-foreground: oklch(0.556 0 0);
+  --muted-foreground: oklch(
-  --accent: oklch(0.97 0 0);
+    0.39 0.0215 96.47 / 80%
-  --accent-foreground: oklch(0.205 0 0);
+  ); /* black olive with opacity */
-  --destructive: oklch(0.577 0.245 27.325);
+  --accent: oklch(0.49 0.1326 259.29); /* denim */
-  --border: oklch(0.922 0 0);
+  --accent-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --input: oklch(0.922 0 0);
+  --destructive: oklch(0.33 0.1316 336.24); /* palatinate */
-  --ring: oklch(0.708 0 0);
+  --border: oklch(0.67 0.0763 198.81 / 30%); /* verdigris with opacity */
-  --chart-1: oklch(0.646 0.222 41.116);
+  --input: oklch(0.67 0.0763 198.81 / 30%); /* verdigris with opacity */
-  --chart-2: oklch(0.6 0.118 184.704);
+  --ring: oklch(0.67 0.0763 198.81); /* verdigris */
-  --chart-3: oklch(0.398 0.07 227.392);
+  --chart-1: oklch(0.67 0.0763 198.81); /* verdigris */
-  --chart-4: oklch(0.828 0.189 84.429);
+  --chart-2: oklch(0.49 0.1326 259.29); /* denim */
-  --chart-5: oklch(0.769 0.188 70.08);
+  --chart-3: oklch(0.33 0.1316 336.24); /* palatinate */
-  --sidebar: oklch(0.985 0 0);
+  --chart-4: oklch(0.39 0.0215 96.47); /* black olive */
-  --sidebar-foreground: oklch(0.145 0 0);
+  --chart-5: oklch(0.67 0.0763 198.81 / 70%); /* verdigris with opacity */
-  --sidebar-primary: oklch(0.205 0 0);
+  --sidebar: oklch(0.49 0.1326 259.29 / 10%); /* denim with opacity */
-  --sidebar-primary-foreground: oklch(0.985 0 0);
+  --sidebar-foreground: oklch(0.39 0.0215 96.47); /* black olive */
-  --sidebar-accent: oklch(0.97 0 0);
+  --sidebar-primary: oklch(0.67 0.0763 198.81); /* verdigris */
-  --sidebar-accent-foreground: oklch(0.205 0 0);
+  --sidebar-primary-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --sidebar-border: oklch(0.922 0 0);
+  --sidebar-accent: oklch(0.49 0.1326 259.29); /* denim */
-  --sidebar-ring: oklch(0.708 0 0);
+  --sidebar-accent-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
+  --sidebar-border: oklch(
+    0.67 0.0763 198.81 / 20%
+  ); /* verdigris with opacity */
+  --sidebar-ring: oklch(0.67 0.0763 198.81); /* verdigris */
 }
 
 .dark {
-  --background: oklch(0.145 0 0);
+  --background: oklch(0.39 0.0215 96.47); /* black olive */
-  --foreground: oklch(0.985 0 0);
+  --foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --card: oklch(0.205 0 0);
+  --card: oklch(0.39 0.0215 96.47 / 80%); /* black olive with opacity */
-  --card-foreground: oklch(0.985 0 0);
+  --card-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --popover: oklch(0.205 0 0);
+  --popover: oklch(0.39 0.0215 96.47); /* black olive */
-  --popover-foreground: oklch(0.985 0 0);
+  --popover-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --primary: oklch(0.922 0 0);
+  --primary: oklch(0.67 0.0763 198.81); /* verdigris */
-  --primary-foreground: oklch(0.205 0 0);
+  --primary-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --secondary: oklch(0.269 0 0);
+  --secondary: oklch(0.49 0.1326 259.29); /* denim */
-  --secondary-foreground: oklch(0.985 0 0);
+  --secondary-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --muted: oklch(0.269 0 0);
+  --muted: oklch(0.39 0.0215 96.47 / 70%); /* black olive with opacity */
-  --muted-foreground: oklch(0.708 0 0);
+  --muted-foreground: oklch(0.67 0.0763 198.81); /* verdigris */
-  --accent: oklch(0.269 0 0);
+  --accent: oklch(0.49 0.1326 259.29); /* denim */
-  --accent-foreground: oklch(0.985 0 0);
+  --accent-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --destructive: oklch(0.704 0.191 22.216);
+  --destructive: oklch(0.33 0.1316 336.24); /* palatinate */
-  --border: oklch(1 0 0 / 10%);
+  --border: oklch(0.97 0.0228 95.96 / 20%); /* cosmic latte with opacity */
-  --input: oklch(1 0 0 / 15%);
+  --input: oklch(0.97 0.0228 95.96 / 20%); /* cosmic latte with opacity */
-  --ring: oklch(0.556 0 0);
+  --ring: oklch(0.67 0.0763 198.81); /* verdigris */
-  --chart-1: oklch(0.488 0.243 264.376);
+  --chart-1: oklch(0.67 0.0763 198.81); /* verdigris */
-  --chart-2: oklch(0.696 0.17 162.48);
+  --chart-2: oklch(0.49 0.1326 259.29); /* denim */
-  --chart-3: oklch(0.769 0.188 70.08);
+  --chart-3: oklch(0.33 0.1316 336.24); /* palatinate */
-  --chart-4: oklch(0.627 0.265 303.9);
+  --chart-4: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --chart-5: oklch(0.645 0.246 16.439);
+  --chart-5: oklch(0.67 0.0763 198.81 / 70%); /* verdigris with opacity */
-  --sidebar: oklch(0.205 0 0);
+  --sidebar: oklch(0.39 0.0215 96.47 / 90%); /* black olive with opacity */
-  --sidebar-foreground: oklch(0.985 0 0);
+  --sidebar-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --sidebar-primary: oklch(0.488 0.243 264.376);
+  --sidebar-primary: oklch(0.67 0.0763 198.81); /* verdigris */
-  --sidebar-primary-foreground: oklch(0.985 0 0);
+  --sidebar-primary-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --sidebar-accent: oklch(0.269 0 0);
+  --sidebar-accent: oklch(0.49 0.1326 259.29); /* denim */
-  --sidebar-accent-foreground: oklch(0.985 0 0);
+  --sidebar-accent-foreground: oklch(0.97 0.0228 95.96); /* cosmic latte */
-  --sidebar-border: oklch(1 0 0 / 10%);
+  --sidebar-border: oklch(
-  --sidebar-ring: oklch(0.556 0 0);
+    0.97 0.0228 95.96 / 10%
+  ); /* cosmic latte with opacity */
+  --sidebar-ring: oklch(0.67 0.0763 198.81); /* verdigris */
 }
 
 @layer base {