diff --git a/templates/index.html b/templates/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Spectrum Viewer</title>
+    <style>
+        :root {
+            --primary-color: #2563eb;
+            --primary-dark: #1d4ed8;
+            --secondary-color: #0f172a;
+            --success-color: #10b981;
+            --error-color: #ef4444;
+            --warning-color: #f59e0b;
+            --light-bg: #f8fafc;
+            --border-color: #e2e8f0;
+            --text-dark: #1e293b;
+            --text-light: #64748b;
+        }
+
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
+            line-height: 1.6;
+            color: var(--text-dark);
+            background-color: #f1f5f9;
+            padding: 20px;
+        }
+
+        .container {
+            max-width: 1200px;
+            margin: 0 auto;
+            background: white;
+            border-radius: 12px;
+            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 10px 15px rgba(0, 0, 0, 0.05);
+            overflow: hidden;
+        }
+
+        header {
+            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
+            color: white;
+            padding: 24px 30px;
+            border-bottom: 1px solid var(--border-color);
+        }
+
+        h1 {
+            font-size: 2rem;
+            font-weight: 700;
+            letter-spacing: -0.5px;
+        }
+
+        .subtitle {
+            font-weight: 400;
+            opacity: 0.9;
+            margin-top: 6px;
+        }
+
+        .form-section {
+            padding: 30px;
+            border-bottom: 1px solid var(--border-color);
+            background-color: white;
+        }
+
+        .section-title {
+            font-size: 1.4rem;
+            font-weight: 600;
+            margin-bottom: 24px;
+            color: var(--secondary-color);
+            display: flex;
+            align-items: center;
+            gap: 8px;
+        }
+
+        .form-group {
+            display: flex;
+            flex-direction: column;
+            gap: 8px;
+           
+        }
+
+        label {
+            font-weight: 600;
+            font-size: 0.95rem;
+            color: var(--text-dark);
+        }
+
+        .input-wrapper {
+            position: relative;
+        }
+
+        input[type="number"] {
+            width: 100%;
+            padding: 12px 16px;
+            border: 1px solid var(--border-color);
+            border-radius: 8px;
+            font-size: 1rem;
+            transition: all 0.2s ease;
+            background-color: white;
+        }
+
+        input[type="number"]:focus {
+            outline: none;
+            border-color: var(--primary-color);
+            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
+        }
+
+        input[type="number"]:disabled {
+            background-color: #f1f5f9;
+            color: #64748b;
+            cursor: not-allowed;
+        }
+
+        .toggle-container {
+            display: flex;
+            align-items: center;
+            gap: 12px;
+            margin-top: 8px;
+        }
+
+        .toggle-switch {
+            position: relative;
+            display: inline-block;
+            width: 50px;
+            height: 24px;
+        }
+
+        .toggle-switch input {
+            opacity: 0;
+            width: 0;
+            height: 0;
+        }
+
+        .slider {
+            position: absolute;
+            cursor: pointer;
+            top: 0;
+            left: 0;
+            right: 0;
+            bottom: 0;
+            background-color: #ccc;
+            transition: .4s;
+            border-radius: 24px;
+        }
+
+        .slider:before {
+            position: absolute;
+            content: "";
+            height: 16px;
+            width: 16px;
+            left: 4px;
+            bottom: 4px;
+            background-color: white;
+            transition: .4s;
+            border-radius: 50%;
+        }
+
+        input:checked + .slider {
+            background-color: var(--primary-color);
+        }
+
+        input:checked + .slider:before {
+            transform: translateX(26px);
+        }
+
+        .toggle-label {
+            font-size: 0.9rem;
+            color: var(--text-light);
+        }
+
+        .button-group {
+            display: flex;
+            gap: 12px;
+            margin-top: 20px;
+        }
+
+        button {
+            padding: 12px 24px;
+            border: none;
+            border-radius: 6px;
+            background-color: var(--primary-color);
+            color: white;
+            font-weight: 500;
+            cursor: pointer;
+            display: flex;
+            align-items: center;
+            gap: 8px;
+            transition: background-color 0.2s;
+        }
+
+        button:hover {
+            background-color: var(--primary-dark);
+        }
+
+        button:disabled {
+            background-color: #94a3b8;
+            cursor: not-allowed;
+        }
+
+        .status {
+            padding: 16px;
+            border-radius: 6px;
+            margin: 20px 0;
+            display: none;
+        }
+
+        .status.success {
+            background-color: rgba(16, 185, 129, 0.1);
+            color: #047857;
+            border: 1px solid rgba(16, 185, 129, 0.2);
+        }
+
+        .status.error {
+            background-color: rgba(239, 68, 68, 0.1);
+            color: #b91c1c;
+            border: 1px solid rgba(239, 68, 68, 0.2);
+        }
+
+        .plot-container {
+            padding: 10px;
+            background-color: #f8fafc;
+        }
+
+        #plotImage {
+            width: 100%;
+            object-fit: cover; /* fill the space completely */
+            border-radius: 8px;
+            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
+            display: block;
+            margin: 0 auto;
+        }
+
+        footer {
+            padding: 20px;
+            text-align: center;
+            color: var(--text-light);
+            font-size: 0.9rem;
+            border-top: 1px solid var(--border-color);
+        }
+
+        @media (max-width: 768px) {
+            .form-grid {
+                display: grid;
+                grid-template-columns: repeat(2, 1fr); /* 2 columns */
+                grid-template-rows: repeat(2, auto);   /* 2 rows */
+                gap: 20px;
+                margin-bottom: 24px;
+            }
+        }
+    </style>
+</head>
+<body>
+<div class="container">
+    <header>
+        <h1>Spectrum Viewer</h1>
+        <p class="subtitle">Real-time RF Spectrum Analysis</p>
+    </header>
+
+    <div class="form-section">
+        <h2 class="section-title">Gain Settings</h2>
+        <form id="gainForm">
+            <div class="form-grid">
+                <!-- USRP Tx -->
+                <div class="form-group">
+                    <label for="usrp_tx_gain">USRP Tx Gain</label>
+                    <div class="input-wrapper">
+                        <input type="number" id="usrp_tx_gain" name="usrp_tx_gain" value="0" disabled>
+                    </div>
+                    <div class="toggle-container">
+                        <label class="toggle-switch">
+                            <input type="checkbox" id="usrp_tx_toggle" class="gain-toggle">
+                            <span class="slider"></span>
+                        </label>
+                        <span class="toggle-label">Update USRP Tx Gain</span>
+                    </div>
+                </div>
+
+                <!-- SCM Tx -->
+                <div class="form-group">
+                    <label for="scm_tx_gain">SCM Tx Gain</label>
+                    <div class="input-wrapper">
+                        <input type="number" id="scm_tx_gain" name="scm_tx_gain" value="0" disabled>
+                    </div>
+                    <div class="toggle-container">
+                        <label class="toggle-switch">
+                            <input type="checkbox" id="scm_tx_toggle" class="gain-toggle">
+                            <span class="slider"></span>
+                        </label>
+                        <span class="toggle-label">Update SCM Tx Gain</span>
+                    </div>
+                </div>
+
+                <!-- USRP Rx -->
+                <div class="form-group">
+                    <label for="usrp_rx_gain">USRP Rx Gain</label>
+                    <div class="input-wrapper">
+                        <input type="number" id="usrp_rx_gain" name="usrp_rx_gain" value="0" disabled>
+                    </div>
+                    <div class="toggle-container">
+                        <label class="toggle-switch">
+                            <input type="checkbox" id="usrp_rx_toggle" class="gain-toggle">
+                            <span class="slider"></span>
+                        </label>
+                        <span class="toggle-label">Update USRP Rx Gain</span>
+                    </div>
+                </div>
+
+                <!-- SCM Rx -->
+                <div class="form-group">
+                    <label for="scm_rx_gain">SCM Rx Gain</label>
+                    <div class="input-wrapper">
+                        <input type="number" id="scm_rx_gain" name="scm_rx_gain" value="0" disabled>
+                    </div>
+                    <div class="toggle-container">
+                        <label class="toggle-switch">
+                            <input type="checkbox" id="scm_rx_toggle" class="gain-toggle">
+                            <span class="slider"></span>
+                        </label>
+                        <span class="toggle-label">Update SCM Rx Gain</span>
+                    </div>
+                </div>
+            </div>
+
+            <div class="button-group">
+                <button type="submit" id="updateBtn">Update Gains</button>
+            </div>
+        </form>
+        <div id="statusMessage" class="status"></div>
+    </div>
+
+    <div class="plot-container">
+        <h3 class="plot-title">Spectrum Analysis</h3>
+        <img id="plotImage" src="/plot" alt="Spectrum Analysis Plot">
+    </div>
+
+    <footer>
+        <p>Spectrum Viewer v1.0 • Real-time RF Monitoring System</p>
+    </footer>
+</div>
+    
+
+    <script>
+    document.addEventListener('DOMContentLoaded', function() {
+        const toggles = document.querySelectorAll('.gain-toggle');
+        const form = document.getElementById('gainForm');
+        const statusMessage = document.getElementById('statusMessage');
+
+        // Enable/disable inputs with correct mapping
+        toggles.forEach(toggle => {
+            toggle.addEventListener('change', function() {
+                let inputId;
+                switch (this.id) {
+                    case 'usrp_tx_toggle': inputId = 'usrp_tx_gain'; break;
+                    case 'usrp_rx_toggle': inputId = 'usrp_rx_gain'; break;
+                    case 'scm_tx_toggle': inputId = 'scm_tx_gain'; break;
+                    case 'scm_rx_toggle': inputId = 'scm_rx_gain'; break;
+                }
+                const inputElement = document.getElementById(inputId);
+                inputElement.disabled = !this.checked;
+                if (this.checked) inputElement.focus();
+            });
+        });
+
+        // Submit form with correct mapping
+        form.addEventListener('submit', function(e) {
+            e.preventDefault();
+
+            const formData = new FormData();
+            let hasUpdates = false;
+
+            toggles.forEach(toggle => {
+                if (toggle.checked) {
+                    let inputId;
+                    switch (toggle.id) {
+                        case 'usrp_tx_toggle': inputId = 'usrp_tx_gain'; break;
+                        case 'usrp_rx_toggle': inputId = 'usrp_rx_gain'; break;
+                        case 'scm_tx_toggle': inputId = 'scm_tx_gain'; break;
+                        case 'scm_rx_toggle': inputId = 'scm_rx_gain'; break;
+                    }
+                    const value = document.getElementById(inputId).value;
+                    formData.append(inputId, value);
+                    hasUpdates = true;
+                }
+            });
+
+            if (!hasUpdates) {
+                showStatus('Please select at least one gain to update', 'error');
+                return;
+            }
+
+            fetch('/update_gains', {
+                method: 'POST',
+                body: formData
+            })
+            .then(res => res.json())
+            .then(data => {
+                if (data.status === "success") {
+                    showStatus(data.message, 'success');
+                    toggles.forEach(toggle => {
+                        toggle.checked = false;
+                        let inputId;
+                        switch (toggle.id) {
+                            case 'usrp_tx_toggle': inputId = 'usrp_tx_gain'; break;
+                            case 'usrp_rx_toggle': inputId = 'usrp_rx_gain'; break;
+                            case 'scm_tx_toggle': inputId = 'scm_tx_gain'; break;
+                            case 'scm_rx_toggle': inputId = 'scm_rx_gain'; break;
+                        }
+                        document.getElementById(inputId).disabled = true;
+                    });
+                } else {
+                    showStatus("Error updating gains", 'error');
+                }
+            })
+            .catch(err => {
+                console.error(err);
+                showStatus("Server error", 'error');
+            });
+        });
+
+        function showStatus(message, type) {
+            statusMessage.textContent = message;
+            statusMessage.className = 'status ' + type;
+            statusMessage.style.display = 'block';
+            if (type === 'success') {
+                setTimeout(() => {
+                    statusMessage.style.display = 'none';
+                }, 3000);
+            }
+        }
+
+        // Auto-refresh plot every 10ms
+        setInterval(() => {
+            const plotImage = document.getElementById('plotImage');
+            plotImage.src = '/plot?' + Date.now();
+        }, 1000);
+    });
+    </script>
+</body>
+</html>
