diff --git a/app.py b/app.py
new file mode 100644
index 0000000..b4bf5cf
--- /dev/null
+++ b/app.py
@@ -0,0 +1,12 @@
+from flask import Flask, render_template
+
+app = Flask(__name__)
+
+
+@app.route("/")
+def index():
+    return render_template("index.html")
+
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=5050, debug=True)
\ No newline at end of file
diff --git a/static/app.js b/static/app.js
new file mode 100644
index 0000000..2913246
--- /dev/null
+++ b/static/app.js
@@ -0,0 +1,553 @@
+const inputIds = Array.from({ length: 80 }, (_, i) => i + 1);
+
+const defaultSensors = [
+    { id: crypto.randomUUID(), name: "Load Cell 1", type: "LoadCell", description: "Default fake load cell", unit: "lbf", mux: "x2", inputPins: [1, 2] },
+    { id: crypto.randomUUID(), name: "Load Cell 2", type: "LoadCell", description: "Default fake load cell", unit: "lbf", mux: "x2", inputPins: [3, 4] },
+    { id: crypto.randomUUID(), name: "Thermocouple 1", type: "Thermocouple", description: "Default fake thermocouple", unit: "°F", mux: "x2", inputPins: [5, 6] },
+    { id: crypto.randomUUID(), name: "Temperature Sensor 1", type: "Temperature", description: "Default fake temperature sensor", unit: "°F", mux: "x1", inputPins: [7] },
+    { id: crypto.randomUUID(), name: "Pressure Sensor 1", type: "Pressure", description: "Default fake pressure sensor", unit: "psi", mux: "x1", inputPins: [8] },
+    { id: crypto.randomUUID(), name: "Flow Sensor 1", type: "Flow", description: "Default fake flow sensor", unit: "kg/s", mux: "x1", inputPins: [9] }
+];
+
+let sensors = [...defaultSensors];
+let actionHistory = [];
+let chartHistory = [];
+let deletedCharts = [];
+let charts = [];
+let chartInstances = [];
+
+let selectedBasicSensor = defaultSensors[0].id;
+let builderMode = "basic";
+let advancedEquation = "temperature";
+
+let pendingSensorPins = [1];
+let advancedSelectedSensors = [];
+let advancedSensorNames = ["Sensor Name 1", "Sensor Name 2"];
+let chartBuilderOpen = false;
+
+const equationMeta = {
+    temperature: { label: "temperature (2 inputs)", inputCount: 2 },
+    loadcell: { label: "loadcell (2 inputs)", inputCount: 2 },
+    myCustomEquation: { label: "myCustomEquation (1 input)", inputCount: 1 }
+};
+
+const navButtons = document.querySelectorAll(".nav-btn");
+const pages = document.querySelectorAll(".page");
+
+const dashboardGrid = document.getElementById("dashboard-grid");
+const dashboardEmpty = document.getElementById("dashboard-empty");
+
+const sensorList = document.getElementById("sensor-list");
+const historyChartList = document.getElementById("history-chart-list");
+const deletedChartList = document.getElementById("deleted-chart-list");
+const historyLogList = document.getElementById("history-log-list");
+
+const chartBuilderModal = document.getElementById("chart-builder-modal");
+const openChartBuilderBtn = document.getElementById("open-chart-builder");
+const closeChartBuilderBtn = document.getElementById("close-chart-builder");
+
+const basicModeBtn = document.getElementById("basic-mode-btn");
+const advancedModeBtn = document.getElementById("advanced-mode-btn");
+const basicModePanel = document.getElementById("basic-mode-panel");
+const advancedModePanel = document.getElementById("advanced-mode-panel");
+
+const basicSensorOptions = document.getElementById("basic-sensor-options");
+const advancedSensorInputs = document.getElementById("advanced-sensor-inputs");
+const equationOptions = document.getElementById("equation-options");
+const customEquationWrap = document.getElementById("custom-equation-wrap");
+const customEquationText = document.getElementById("custom-equation-text");
+
+const confirmBasicChartBtn = document.getElementById("confirm-basic-chart");
+const confirmAdvancedChartBtn = document.getElementById("confirm-advanced-chart");
+
+const openAddSensorFromAdvancedBtn = document.getElementById("open-add-sensor-from-advanced");
+const addMoreEquationBtn = document.getElementById("add-more-equation-btn");
+
+const addSensorModal = document.getElementById("add-sensor-modal");
+const showAddSensorBtn = document.getElementById("show-add-sensor");
+const closeAddSensorBtn = document.getElementById("close-add-sensor");
+
+const sensorNameInput = document.getElementById("sensor-name-input");
+const sensorDescriptionInput = document.getElementById("sensor-description-input");
+const sensorTypeInput = document.getElementById("sensor-type-input");
+const sensorMuxInput = document.getElementById("sensor-mux-input");
+const analogPinList = document.getElementById("analog-pin-list");
+const addAnalogPinBtn = document.getElementById("add-analog-pin-btn");
+const saveSensorBtn = document.getElementById("save-sensor-btn");
+
+function init() {
+    renderSensors();
+    renderHistory();
+    renderBasicSensorOptions();
+    renderAdvancedInputs();
+    renderEquationOptions();
+    renderAnalogPinSelectors();
+    wireEvents();
+}
+
+function wireEvents() {
+    navButtons.forEach(btn => {
+        btn.addEventListener("click", () => {
+            const target = btn.dataset.page;
+            navButtons.forEach(b => b.classList.remove("active"));
+            btn.classList.add("active");
+            pages.forEach(page => page.classList.remove("active"));
+            document.getElementById(`page-${target}`).classList.add("active");
+        });
+    });
+
+    openChartBuilderBtn.addEventListener("click", () => openChartBuilder());
+    closeChartBuilderBtn.addEventListener("click", () => closeChartBuilder());
+
+    basicModeBtn.addEventListener("click", () => setBuilderMode("basic"));
+    advancedModeBtn.addEventListener("click", () => setBuilderMode("advanced"));
+
+    confirmBasicChartBtn.addEventListener("click", addBasicChart);
+    confirmAdvancedChartBtn.addEventListener("click", addAdvancedChart);
+
+    showAddSensorBtn.addEventListener("click", openAddSensorModal);
+    closeAddSensorBtn.addEventListener("click", closeAddSensorModal);
+
+    openAddSensorFromAdvancedBtn.addEventListener("click", openAddSensorModal);
+    addMoreEquationBtn.addEventListener("click", openAddSensorModal);
+
+    addAnalogPinBtn.addEventListener("click", () => {
+        pendingSensorPins.push(1);
+        renderAnalogPinSelectors();
+    });
+
+    saveSensorBtn.addEventListener("click", addSensor);
+
+    chartBuilderModal.addEventListener("click", (e) => {
+        if (e.target === chartBuilderModal) closeChartBuilder();
+    });
+
+    addSensorModal.addEventListener("click", (e) => {
+        if (e.target === addSensorModal) closeAddSensorModal();
+    });
+}
+
+function openChartBuilder() {
+    chartBuilderOpen = true;
+    chartBuilderModal.classList.remove("hidden");
+}
+
+function closeChartBuilder() {
+    chartBuilderOpen = false;
+    chartBuilderModal.classList.add("hidden");
+}
+
+function setBuilderMode(mode) {
+    builderMode = mode;
+
+    if (mode === "basic") {
+        basicModeBtn.classList.add("active");
+        advancedModeBtn.classList.remove("active");
+        basicModePanel.classList.remove("hidden");
+        advancedModePanel.classList.add("hidden");
+    } else {
+        advancedModeBtn.classList.add("active");
+        basicModeBtn.classList.remove("active");
+        advancedModePanel.classList.remove("hidden");
+        basicModePanel.classList.add("hidden");
+    }
+}
+
+function openAddSensorModal() {
+    addSensorModal.classList.remove("hidden");
+}
+
+function closeAddSensorModal() {
+    addSensorModal.classList.add("hidden");
+}
+
+function renderSensors() {
+    sensorList.innerHTML = "";
+
+    sensors.forEach(sensor => {
+        const div = document.createElement("div");
+        div.className = "sensor-item";
+        div.innerHTML = `
+            <strong>${sensor.name}</strong><br>
+            <small>${sensor.type} • ${sensor.mux} • AIN ${sensor.inputPins.join(", ")}</small><br>
+            <small>${sensor.description || ""}</small>
+        `;
+        sensorList.appendChild(div);
+    });
+
+    renderBasicSensorOptions();
+    renderAdvancedInputs();
+}
+
+function renderHistory() {
+    historyChartList.innerHTML = "";
+    deletedChartList.innerHTML = "";
+    historyLogList.innerHTML = "";
+
+    if (chartHistory.length === 0) {
+        historyChartList.innerHTML = `<div class="history-item">No charts created yet.</div>`;
+    } else {
+        chartHistory.forEach(chart => {
+            const item = document.createElement("div");
+            item.className = "history-item row-between";
+            item.innerHTML = `
+                <div>
+                    <strong>${chart.title}</strong><br>
+                    <small>${chart.sensorName} • created at ${chart.createdAt}</small>
+                </div>
+                <button class="secondary-btn restore-btn">Open again</button>
+            `;
+            item.querySelector(".restore-btn").addEventListener("click", () => restoreChart(chart));
+            historyChartList.appendChild(item);
+        });
+    }
+
+    if (deletedCharts.length === 0) {
+        deletedChartList.innerHTML = `<div class="history-item">No deleted charts yet.</div>`;
+    } else {
+        deletedCharts.forEach(chart => {
+            const item = document.createElement("div");
+            item.className = "history-item row-between";
+            item.innerHTML = `
+                <div>
+                    <strong>${chart.title}</strong><br>
+                    <small>${chart.sensorName}</small>
+                </div>
+                <button class="secondary-btn restore-btn">Restore</button>
+            `;
+            item.querySelector(".restore-btn").addEventListener("click", () => restoreChart(chart));
+            deletedChartList.appendChild(item);
+        });
+    }
+
+    if (actionHistory.length === 0) {
+        historyLogList.innerHTML = `<div class="history-item">No actions yet.</div>`;
+    } else {
+        actionHistory.forEach(item => {
+            const div = document.createElement("div");
+            div.className = "history-item";
+            div.textContent = item;
+            historyLogList.appendChild(div);
+        });
+    }
+}
+
+function renderBasicSensorOptions() {
+    basicSensorOptions.innerHTML = "";
+
+    sensors.forEach(sensor => {
+        const label = document.createElement("label");
+        label.className = "sensor-option";
+        label.innerHTML = `
+            <input type="radio" name="basicSensor" value="${sensor.id}" ${sensor.id === selectedBasicSensor ? "checked" : ""}>
+            <span>${sensor.name}</span>
+        `;
+        basicSensorOptions.appendChild(label);
+    });
+
+    document.querySelectorAll('input[name="basicSensor"]').forEach(radio => {
+        radio.addEventListener("change", e => {
+            selectedBasicSensor = e.target.value;
+        });
+    });
+}
+
+function renderAdvancedInputs() {
+    const needed = equationMeta[advancedEquation].inputCount;
+
+    while (advancedSensorNames.length < needed) advancedSensorNames.push(`Sensor Name ${advancedSensorNames.length + 1}`);
+    advancedSensorNames = advancedSensorNames.slice(0, needed);
+    advancedSelectedSensors = advancedSelectedSensors.slice(0, needed);
+
+    advancedSensorInputs.innerHTML = "";
+
+    for (let i = 0; i < needed; i++) {
+        const row = document.createElement("div");
+        row.className = "advanced-row";
+
+        const sensorNameBox = document.createElement("input");
+        sensorNameBox.type = "text";
+        sensorNameBox.value = advancedSensorNames[i] || "";
+        sensorNameBox.placeholder = `Sensor Name ${i + 1}`;
+        sensorNameBox.addEventListener("input", (e) => {
+            advancedSensorNames[i] = e.target.value;
+        });
+
+        const sensorSelect = document.createElement("select");
+        sensorSelect.innerHTML = `<option value="">Select sensor</option>`;
+        sensors.forEach(sensor => {
+            const option = document.createElement("option");
+            option.value = sensor.id;
+            option.textContent = sensor.name;
+            if (advancedSelectedSensors[i] === sensor.id) option.selected = true;
+            sensorSelect.appendChild(option);
+        });
+
+        sensorSelect.addEventListener("change", (e) => {
+            const id = e.target.value;
+            advancedSelectedSensors[i] = id;
+            const sensor = sensors.find(s => s.id === id);
+            if (sensor) {
+                advancedSensorNames[i] = sensor.name;
+                sensorNameBox.value = sensor.name;
+            }
+        });
+
+        row.appendChild(sensorNameBox);
+        row.appendChild(sensorSelect);
+        advancedSensorInputs.appendChild(row);
+    }
+}
+
+function renderEquationOptions() {
+    equationOptions.innerHTML = "";
+
+    Object.entries(equationMeta).forEach(([key, meta]) => {
+        const label = document.createElement("label");
+        label.className = "sensor-option";
+        label.innerHTML = `
+            <input type="radio" name="equationType" value="${key}" ${advancedEquation === key ? "checked" : ""}>
+            <span>${meta.label}</span>
+        `;
+        equationOptions.appendChild(label);
+    });
+
+    document.querySelectorAll('input[name="equationType"]').forEach(radio => {
+        radio.addEventListener("change", (e) => {
+            advancedEquation = e.target.value;
+            renderAdvancedInputs();
+            customEquationWrap.classList.toggle("hidden", advancedEquation !== "myCustomEquation");
+        });
+    });
+
+    customEquationWrap.classList.toggle("hidden", advancedEquation !== "myCustomEquation");
+}
+
+function renderAnalogPinSelectors() {
+    analogPinList.innerHTML = "";
+
+    pendingSensorPins.forEach((pin, index) => {
+        const select = document.createElement("select");
+        inputIds.forEach(id => {
+            const option = document.createElement("option");
+            option.value = id;
+            option.textContent = `AIN${id}`;
+            if (pin === id) option.selected = true;
+            select.appendChild(option);
+        });
+
+        select.addEventListener("change", (e) => {
+            pendingSensorPins[index] = Number(e.target.value);
+        });
+
+        analogPinList.appendChild(select);
+    });
+}
+
+function addSensor() {
+    const name = sensorNameInput.value.trim();
+    const description = sensorDescriptionInput.value.trim();
+    const type = sensorTypeInput.value;
+    const mux = sensorMuxInput.value;
+
+    if (!name) return;
+
+    const newSensor = {
+        id: crypto.randomUUID(),
+        name,
+        description,
+        type,
+        mux,
+        inputPins: [...pendingSensorPins],
+        unit: type === "Pressure" ? "psi" : type === "LoadCell" ? "lbf" : type === "Thermocouple" || type === "Temperature" ? "°F" : type === "Flow" ? "kg/s" : "units"
+    };
+
+    sensors.push(newSensor);
+    actionHistory.unshift(`Added sensor ${name} using ${mux} on AIN ${pendingSensorPins.join(", ")}`);
+
+    sensorNameInput.value = "";
+    sensorDescriptionInput.value = "";
+    sensorTypeInput.value = "Custom";
+    sensorMuxInput.value = "x1";
+    pendingSensorPins = [1];
+
+    renderSensors();
+    renderHistory();
+    renderAnalogPinSelectors();
+    closeAddSensorModal();
+}
+
+function addBasicChart() {
+    const sensor = sensors.find(s => s.id === selectedBasicSensor);
+    if (!sensor) return;
+
+    const chart = buildChartObject({
+        title: `${sensor.name} Live Chart`,
+        sensor
+    });
+
+    charts.push(chart.id);
+    chartHistory.unshift(chart);
+    actionHistory.unshift(`Added basic chart for ${sensor.name}`);
+    createChartCard(chart);
+    renderHistory();
+    closeChartBuilder();
+}
+
+function addAdvancedChart() {
+    const sensor = sensors.find(s => s.id === advancedSelectedSensors[0]) || sensors[0];
+    const title = advancedSensorNames[0] || `${advancedEquation} Live Chart`;
+
+    const chart = buildChartObject({
+        title,
+        sensor,
+        equationType: advancedEquation,
+        customEquation: advancedEquation === "myCustomEquation" ? customEquationText.value : ""
+    });
+
+    charts.push(chart.id);
+    chartHistory.unshift(chart);
+    actionHistory.unshift(`Added advanced chart ${title}`);
+    createChartCard(chart);
+    renderHistory();
+    closeChartBuilder();
+}
+
+function buildChartObject({ title, sensor, equationType = "", customEquation = "" }) {
+    return {
+        id: `chart-${Date.now()}-${Math.floor(Math.random() * 1000)}`,
+        title,
+        sensorId: sensor.id,
+        sensorName: sensor.name,
+        inputId: `AIN ${sensor.inputPins.join(", ")}`,
+        unit: sensor.unit || "units",
+        equationType,
+        customEquation,
+        createdAt: new Date().toLocaleTimeString()
+    };
+}
+
+function deleteChart(chartId) {
+    const chartIndex = chartInstances.findIndex(item => item.chart.canvas.id === chartId);
+    if (chartIndex === -1) return;
+
+    const chartInfo = chartInstances[chartIndex];
+    const deletedChart = chartInfo.meta;
+
+    deletedCharts.unshift(deletedChart);
+    actionHistory.unshift(`Deleted chart ${deletedChart.title}`);
+
+    chartInfo.chart.destroy();
+    chartInstances.splice(chartIndex, 1);
+    charts = charts.filter(id => id !== chartId);
+
+    const card = document.querySelector(`[data-chart-id="${chartId}"]`);
+    if (card) card.remove();
+
+    if (dashboardGrid.children.length === 0) {
+        dashboardEmpty.classList.remove("hidden");
+        dashboardGrid.classList.add("hidden");
+    }
+
+    renderHistory();
+}
+
+function restoreChart(chart) {
+    const restored = {
+        ...chart,
+        id: `chart-${Date.now()}-${Math.floor(Math.random() * 1000)}`
+    };
+
+    charts.push(restored.id);
+    actionHistory.unshift(`Restored chart ${restored.title}`);
+    createChartCard(restored);
+    renderHistory();
+
+    navButtons.forEach(b => b.classList.remove("active"));
+    document.querySelector('[data-page="dashboard"]').classList.add("active");
+    pages.forEach(page => page.classList.remove("active"));
+    document.getElementById("page-dashboard").classList.add("active");
+}
+
+function createChartCard(chartMeta) {
+    dashboardEmpty.classList.add("hidden");
+    dashboardGrid.classList.remove("hidden");
+
+    const card = document.createElement("div");
+    card.className = "chart-card";
+    card.dataset.chartId = chartMeta.id;
+
+    card.innerHTML = `
+        <div class="chart-card-header">
+            <div>
+                <h3>${chartMeta.title}</h3>
+                <div class="chart-subtitle">
+                    ${chartMeta.sensorName} • ${chartMeta.inputId} • ${chartMeta.unit}
+                    ${chartMeta.equationType ? `• ${chartMeta.equationType}` : ""}
+                </div>
+            </div>
+            <button class="delete-chart-btn">Delete</button>
+        </div>
+        <div class="chart-wrapper">
+            <canvas id="${chartMeta.id}"></canvas>
+        </div>
+    `;
+
+    dashboardGrid.appendChild(card);
+
+    card.querySelector(".delete-chart-btn").addEventListener("click", () => {
+        deleteChart(chartMeta.id);
+    });
+
+    const ctx = document.getElementById(chartMeta.id).getContext("2d");
+    const chart = new Chart(ctx, {
+        type: "line",
+        data: {
+            labels: Array.from({ length: 20 }, (_, i) => i),
+            datasets: [{
+                label: chartMeta.title,
+                data: makeFakeData(chartMeta.sensorId + chartMeta.equationType),
+                borderColor: "#f97316",
+                backgroundColor: "rgba(249, 115, 22, 0.15)",
+                tension: 0.3,
+                fill: true
+            }]
+        },
+        options: {
+            responsive: true,
+            maintainAspectRatio: false
+        }
+    });
+
+    chartInstances.push({ chart, meta: chartMeta });
+}
+
+function makeFakeData(seed) {
+    const hash = String(seed).split("").reduce((acc, ch) => acc + ch.charCodeAt(0), 0);
+    const base = 40 + (hash % 250);
+
+    return Array.from({ length: 20 }, (_, i) => {
+        return Number((base + Math.sin(i / 3) * 8 + Math.cos(i / 4) * 2).toFixed(2));
+    });
+}
+
+setInterval(() => {
+    chartInstances.forEach(item => {
+        const dataset = item.chart.data.datasets[0].data;
+        const labels = item.chart.data.labels;
+        const lastX = labels[labels.length - 1];
+        const nextValue = Number((dataset[dataset.length - 1] + (Math.random() * 6 - 3)).toFixed(2));
+
+        dataset.push(nextValue);
+        labels.push(lastX + 1);
+
+        if (dataset.length > 20) {
+            dataset.shift();
+            labels.shift();
+        }
+
+        item.chart.update();
+    });
+}, 1000);
+
+init();
\ No newline at end of file
diff --git a/static/styles.css b/static/styles.css
new file mode 100644
index 0000000..2c2a312
--- /dev/null
+++ b/static/styles.css
@@ -0,0 +1,354 @@
+* {
+    box-sizing: border-box;
+}
+
+body {
+    margin: 0;
+    font-family: Arial, Helvetica, sans-serif;
+    background: #0f172a;
+    color: #e2e8f0;
+}
+
+.app-shell {
+    display: flex;
+    min-height: 100vh;
+}
+
+.sidebar {
+    width: 260px;
+    background: #111827;
+    border-right: 1px solid #1f2937;
+    padding: 24px;
+}
+
+.sidebar-title {
+    font-size: 28px;
+    margin-bottom: 24px;
+}
+
+.nav-btn {
+    width: 100%;
+    text-align: left;
+    margin-bottom: 10px;
+    padding: 12px 14px;
+    border: none;
+    border-radius: 14px;
+    background: #1f2937;
+    color: #e5e7eb;
+    cursor: pointer;
+    font-size: 15px;
+}
+
+.nav-btn.active {
+    background: #f97316;
+    color: white;
+}
+
+.sidebar-help {
+    margin-top: 28px;
+    font-size: 13px;
+    color: #94a3b8;
+    line-height: 1.5;
+}
+
+.main-content {
+    flex: 1;
+    padding: 28px;
+}
+
+.page {
+    display: none;
+}
+
+.page.active {
+    display: block;
+}
+
+.page-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 22px;
+}
+
+.page-header h2,
+.panel h3 {
+    margin-top: 0;
+}
+
+.page-header h2 {
+    font-size: 34px;
+}
+
+.primary-btn,
+.secondary-btn,
+.close-btn,
+.mode-btn,
+.delete-chart-btn {
+    border: none;
+    border-radius: 14px;
+    cursor: pointer;
+}
+
+.primary-btn {
+    background: #f97316;
+    color: white;
+    padding: 12px 18px;
+    font-size: 15px;
+}
+
+.secondary-btn {
+    background: #1f2937;
+    color: white;
+    padding: 12px 18px;
+}
+
+.panel {
+    background: #111827;
+    border: 1px solid #1f2937;
+    border-radius: 24px;
+    padding: 22px;
+    margin-bottom: 20px;
+}
+
+.empty-state {
+    border: 1px dashed #334155;
+    border-radius: 24px;
+    min-height: 420px;
+    display: grid;
+    place-items: center;
+    text-align: center;
+    color: #94a3b8;
+}
+
+.chart-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
+    gap: 20px;
+}
+
+.chart-card {
+    background: #111827;
+    border: 1px solid #1f2937;
+    border-radius: 24px;
+    padding: 18px;
+}
+
+.chart-card-header,
+.row-between,
+.builder-head {
+    display: flex;
+    justify-content: space-between;
+    align-items: flex-start;
+    gap: 12px;
+}
+
+.chart-card h3 {
+    margin: 0 0 6px 0;
+}
+
+.chart-subtitle {
+    color: #94a3b8;
+    font-size: 14px;
+    margin-bottom: 14px;
+}
+
+.chart-wrapper {
+    height: 260px;
+}
+
+.delete-chart-btn {
+    background: #7f1d1d;
+    color: white;
+    padding: 8px 12px;
+    font-size: 13px;
+}
+
+.delete-chart-btn:hover {
+    background: #991b1b;
+}
+
+.hidden {
+    display: none !important;
+}
+
+.sensor-list,
+.history-list,
+.sensor-option-list,
+.deleted-chart-list,
+.equation-list {
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+}
+
+.sensor-item,
+.history-item,
+.sensor-option {
+    background: #0f172a;
+    border: 1px solid #1f2937;
+    border-radius: 18px;
+    padding: 14px;
+}
+
+.sensor-option {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+}
+
+.builder-panel input,
+.builder-panel select,
+.builder-panel textarea {
+    width: 100%;
+    margin-bottom: 14px;
+    padding: 14px;
+    border-radius: 16px;
+    border: 1px solid #334155;
+    background: #0f172a;
+    color: #e2e8f0;
+    font-size: 15px;
+}
+
+.builder-panel textarea {
+    min-height: 100px;
+    resize: vertical;
+}
+
+.button-row {
+    margin-top: 18px;
+    display: flex;
+    gap: 10px;
+    flex-wrap: wrap;
+}
+
+.modal {
+    position: fixed;
+    inset: 0;
+    background: rgba(2, 6, 23, 0.75);
+    display: grid;
+    place-items: center;
+    padding: 20px;
+    z-index: 30;
+}
+
+.modal-card {
+    width: min(900px, 100%);
+    background: #111827;
+    border: 1px solid #334155;
+    border-radius: 28px;
+    padding: 24px;
+}
+
+.modal-card.large {
+    width: min(1050px, 100%);
+}
+
+.modal-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: flex-start;
+}
+
+.modal-header h2,
+.modal-header h3 {
+    margin: 0;
+}
+
+.modal-header h2 {
+    font-size: 34px;
+}
+
+.modal-header h3 {
+    font-size: 28px;
+}
+
+.close-btn {
+    width: 42px;
+    height: 42px;
+    background: #1f2937;
+    color: white;
+    font-size: 24px;
+}
+
+.mode-switch {
+    display: flex;
+    justify-content: center;
+    gap: 12px;
+    margin: 24px 0;
+}
+
+.mode-btn {
+    padding: 10px 20px;
+    background: #1f2937;
+    color: white;
+}
+
+.mode-btn.active {
+    background: white;
+    color: #111827;
+}
+
+.builder-panel {
+    background: #0f172a;
+    border: 1px solid #334155;
+    border-radius: 24px;
+    padding: 20px;
+}
+
+.confirm-row {
+    display: flex;
+    justify-content: flex-end;
+    margin-top: 12px;
+}
+
+.equations-box,
+.analog-pin-box {
+    margin-top: 14px;
+    padding: 14px;
+    background: #111827;
+    border-radius: 16px;
+    color: #cbd5e1;
+}
+
+.advanced-inputs,
+#analog-pin-list {
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+}
+
+.advanced-row {
+    display: grid;
+    gap: 12px;
+    grid-template-columns: 1fr 1fr;
+}
+
+.deleted-dropdown summary {
+    cursor: pointer;
+    font-weight: bold;
+}
+
+@media (max-width: 900px) {
+    .app-shell {
+        flex-direction: column;
+    }
+
+    .sidebar {
+        width: 100%;
+        border-right: none;
+        border-bottom: 1px solid #1f2937;
+    }
+
+    .advanced-row {
+        grid-template-columns: 1fr;
+    }
+
+    .page-header,
+    .chart-card-header,
+    .row-between,
+    .builder-head {
+        flex-direction: column;
+        align-items: stretch;
+    }
+}
\ No newline at end of file
diff --git a/templates/index.html b/templates/index.html
new file mode 100644
index 0000000..0cd2e18
--- /dev/null
+++ b/templates/index.html
@@ -0,0 +1,200 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Clementine Dashboard UI Mock</title>
+    <link rel="stylesheet" href="{{ url_for('static', filename='styles.css') }}" />
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+</head>
+<body>
+    <div class="app-shell">
+        <aside class="sidebar">
+            <h1 class="sidebar-title">Dashboard</h1>
+
+            <button class="nav-btn active" data-page="dashboard">Tabs</button>
+            <button class="nav-btn" data-page="buttons">Buttons</button>
+            <button class="nav-btn" data-page="sensors">Sensors</button>
+            <button class="nav-btn" data-page="history">History</button>
+            <button class="nav-btn" data-page="grafana">Grafana</button>
+
+            <div class="sidebar-help">
+                <p><strong>Tabs:</strong> main dashboard page</p>
+                <p><strong>Buttons:</strong> future quick controls</p>
+                <p><strong>Sensors:</strong> view and add sensors</p>
+                <p><strong>History:</strong> restore previously created charts</p>
+                <p><strong>Grafana:</strong> future integration page</p>
+            </div>
+        </aside>
+
+        <main class="main-content">
+            <section id="page-dashboard" class="page active">
+                <div class="page-header">
+                    <h2>Dashboard</h2>
+                    <button id="open-chart-builder" class="primary-btn">+ Add Chart</button>
+                </div>
+
+                <div id="dashboard-empty" class="empty-state">
+                    <h3>No charts yet</h3>
+                    <p>Click “Add Chart” to create a fake time-series chart.</p>
+                </div>
+
+                <div id="dashboard-grid" class="chart-grid hidden"></div>
+            </section>
+
+            <section id="page-buttons" class="page">
+                <div class="page-header">
+                    <h2>Buttons</h2>
+                </div>
+                <div class="panel">
+                    <p>This page is reserved for future quick controls like pause chart, clear dashboard, export data, or chart actions.</p>
+                    <div class="button-row">
+                        <button class="secondary-btn">Pause All</button>
+                        <button class="secondary-btn">Clear Dashboard</button>
+                        <button class="secondary-btn">Export Mock Data</button>
+                    </div>
+                </div>
+            </section>
+
+            <section id="page-sensors" class="page">
+                <div class="page-header">
+                    <h2>Sensors</h2>
+                    <button id="show-add-sensor" class="primary-btn">Add sensor</button>
+                </div>
+
+                <div class="panel">
+                    <div id="sensor-list" class="sensor-list"></div>
+                </div>
+            </section>
+
+            <section id="page-history" class="page">
+                <div class="page-header">
+                    <h2>History</h2>
+                </div>
+
+                <div class="panel">
+                    <h3>Previously Created Charts</h3>
+                    <div id="history-chart-list" class="history-list"></div>
+                </div>
+
+                <div class="panel">
+                    <h3>Recently Deleted Charts</h3>
+                    <details class="deleted-dropdown" open>
+                        <summary>Open deleted chart list</summary>
+                        <div id="deleted-chart-list" class="deleted-chart-list"></div>
+                    </details>
+                </div>
+
+                <div class="panel">
+                    <h3>Action Log</h3>
+                    <div id="history-log-list" class="history-list"></div>
+                </div>
+            </section>
+
+            <section id="page-grafana" class="page">
+                <div class="page-header">
+                    <h2>Grafana</h2>
+                </div>
+                <div class="panel">
+                    <p>This is a placeholder page for future Grafana integration.</p>
+                </div>
+            </section>
+        </main>
+    </div>
+
+    <!-- CHART BUILDER MODAL -->
+    <div id="chart-builder-modal" class="modal hidden">
+        <div class="modal-card large">
+            <div class="modal-header">
+                <div>
+                    <h2>Live Chart</h2>
+                    <h3>Time series</h3>
+                </div>
+                <button id="close-chart-builder" class="close-btn">×</button>
+            </div>
+
+            <div class="mode-switch">
+                <button id="basic-mode-btn" class="mode-btn active">Basic</button>
+                <button id="advanced-mode-btn" class="mode-btn">Advanced</button>
+            </div>
+
+            <!-- BASIC -->
+            <div id="basic-mode-panel" class="builder-panel">
+                <div id="basic-sensor-options" class="sensor-option-list"></div>
+                <div class="confirm-row">
+                    <button id="confirm-basic-chart" class="primary-btn">Confirm</button>
+                </div>
+            </div>
+
+            <!-- ADVANCED -->
+            <div id="advanced-mode-panel" class="builder-panel hidden">
+                <div class="builder-head">
+                    <h3>Input section</h3>
+                    <button id="open-add-sensor-from-advanced" class="secondary-btn">Add equation</button>
+                </div>
+
+                <div id="advanced-sensor-inputs" class="advanced-inputs"></div>
+
+                <h3>Equations</h3>
+                <div class="equations-box">
+                    <div id="equation-options" class="equation-list"></div>
+                    <button id="add-more-equation-btn" class="secondary-btn">Add more equation</button>
+                </div>
+
+                <div id="custom-equation-wrap" class="hidden">
+                    <textarea id="custom-equation-text" placeholder="function(a) { return a * 100 + 2; }"></textarea>
+                </div>
+
+                <div class="confirm-row">
+                    <button id="confirm-advanced-chart" class="primary-btn">Confirm</button>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <!-- ADD SENSOR MODAL -->
+    <div id="add-sensor-modal" class="modal hidden">
+        <div class="modal-card">
+            <div class="modal-header">
+                <div>
+                    <h2>Add new sensor</h2>
+                </div>
+                <button id="close-add-sensor" class="close-btn">×</button>
+            </div>
+
+            <div class="builder-panel">
+                <input id="sensor-name-input" type="text" placeholder="Please input sensor name" />
+                <textarea id="sensor-description-input" placeholder="Please input description"></textarea>
+
+                <select id="sensor-type-input">
+                    <option value="Custom">Custom</option>
+                    <option value="LoadCell">LoadCell</option>
+                    <option value="Thermocouple">Thermocouple</option>
+                    <option value="Temperature">Temperature</option>
+                    <option value="Pressure">Pressure</option>
+                    <option value="Flow">Flow</option>
+                </select>
+
+                <select id="sensor-mux-input">
+                    <option value="x1">x1</option>
+                    <option value="x2">x2</option>
+                    <option value="x3">x3</option>
+                    <option value="x4">x4</option>
+                </select>
+
+                <div class="analog-pin-box">
+                    <div class="analog-pin-title">Analog input pins</div>
+                    <div id="analog-pin-list"></div>
+                    <button id="add-analog-pin-btn" class="secondary-btn">Add another analog input pin</button>
+                </div>
+
+                <div class="confirm-row">
+                    <button id="save-sensor-btn" class="primary-btn">Confirm</button>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <script src="{{ url_for('static', filename='app.js') }}"></script>
+</body>
+</html>
\ No newline at end of file