fstng.html

<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Fasting Tracker</title>
    <script src="https://d3js.org/d3.v7.min.js"></script>
    <style>
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --danger: #ef4444;
            --danger-dark: #dc2626;
            --edit: #8b5cf6;
            --edit-dark: #7c3aed;
            --background: #f8fafc;
            --card-bg: #ffffff;
            --text: #1e293b;
            --text-secondary: #64748b;
            --gauge-bg: #e2e8f0;
            --gauge-progress: #818cf8;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            margin: 0;
            background-color: var(--background);
            padding: 1rem;
            color: var(--text);
        }

        .container {
            text-align: center;
            background: var(--card-bg);
            padding: 2rem;
            border-radius: 20px;
            box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            width: 100%;
            max-width: 400px;
            display: flex;
            flex-direction: column;
            align-items: center;
            transition: all 0.3s ease;
        }

        button {
            padding: 12px 24px;
            font-size: 1rem;
            margin: 6px;
            cursor: pointer;
            border: none;
            border-radius: 12px;
            background-color: var(--primary);
            color: white;
            transition: all 0.2s ease;
            width: 200px;
            font-weight: 500;
            letter-spacing: 0.3px;
            box-shadow: 0 2px 4px rgba(99, 102, 241, 0.2);
        }

        button:hover {
            background-color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 6px rgba(99, 102, 241, 0.3);
        }

        button:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        button#resetBtn {
            background-color: var(--danger);
            box-shadow: 0 2px 4px rgba(239, 68, 68, 0.2);
        }

        button#resetBtn:hover {
            background-color: var(--danger-dark);
            box-shadow: 0 4px 6px rgba(239, 68, 68, 0.3);
        }

        button#editBtn {
            background-color: var(--edit);
            box-shadow: 0 2px 4px rgba(139, 92, 246, 0.2);
        }

        button#editBtn:hover {
            background-color: var(--edit-dark);
            box-shadow: 0 4px 6px rgba(139, 92, 246, 0.3);
        }

        .time-display {
            font-size: 3em;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            white-space: nowrap;
            font-family: 'SF Mono', 'Roboto Mono', monospace;
            font-weight: 600;
            color: var(--text);
            letter-spacing: -1px;
        }

        .gauge-container {
            width: 100%;
            max-width: 300px;
            height: 300px;
            margin: 0 auto;
            position: relative;
            padding: 1rem;
        }

        h1 {
            font-size: 1.8em;
            margin: 0 0 1.5rem 0;
            width: 100%;
            text-align: center;
            color: var(--text);
            font-weight: 700;
        }

        .controls {
            margin-top: 1.5rem;
            width: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }

        .time-edit {
            display: none;
            margin: 1rem 0;
            width: 100%;
            text-align: center;
        }

        .time-edit.visible {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 12px;
        }

        .time-edit input {
            padding: 12px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 1em;
            width: 200px;
            text-align: center;
            transition: border-color 0.2s ease;
            outline: none;
        }

        .time-edit input:focus {
            border-color: var(--primary);
        }

        @media (max-width: 480px) {
            .container {
                padding: 1.5rem;
            }
            
            button {
                padding: 10px 20px;
                font-size: 0.95em;
                width: 180px;
            }

            .time-display {
                font-size: 2.5em;
            }

            h1 {
                font-size: 1.5em;
            }

            .time-edit input {
                width: 180px;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>Fasting Tracker</h1>
        <div class="gauge-container">
            <div class="time-display">
                <span id="timeElapsed">00:00:00</span>
            </div>
        </div>
        <div class="controls">
            <button id="startBtn">Start Fast</button>
            <button id="editBtn">Edit Start Time</button>
            <button id="resetBtn">Reset</button>
            <div class="time-edit" id="timeEdit">
                <input type="datetime-local" id="startTimeInput" step="1">
                <button id="saveTimeBtn">Save</button>
            </div>
        </div>
    </div>

    <script>
        const config = {
            width: 300,
            height: 300,
            margin: 40,
            minValue: 0,
            maxValue: 24,
            circleThickness: 0.12
        };

        const gauge = d3.select('.gauge-container')
            .append('svg')
            .attr('width', '100%')
            .attr('height', '100%')
            .attr('viewBox', `0 0 ${config.width} ${config.height}`)
            .attr('preserveAspectRatio', 'xMidYMid meet');

        const radius = Math.min(config.width, config.height) / 2 - config.margin;
        const centerX = config.width / 2;
        const centerY = config.height / 2;

        const backgroundArc = d3.arc()
            .innerRadius(radius * (1 - config.circleThickness))
            .outerRadius(radius)
            .startAngle(0)
            .endAngle(2 * Math.PI);

        gauge.append('path')
            .attr('transform', `translate(${centerX},${centerY})`)
            .attr('d', backgroundArc)
            .style('fill', 'var(--gauge-bg)');

        const progressArc = d3.arc()
            .innerRadius(radius * (1 - config.circleThickness))
            .outerRadius(radius)
            .startAngle(0);

        const progressPath = gauge.append('path')
            .attr('transform', `translate(${centerX},${centerY})`)
            .style('fill', 'var(--gauge-progress)')
            .style('transition', 'fill 0.3s ease');

        let startTime = localStorage.getItem('fastingStartTime');
        const startBtn = document.getElementById('startBtn');
        const resetBtn = document.getElementById('resetBtn');
        const editBtn = document.getElementById('editBtn');
        const timeEdit = document.getElementById('timeEdit');
        const startTimeInput = document.getElementById('startTimeInput');
        const saveTimeBtn = document.getElementById('saveTimeBtn');
        const timeElapsedSpan = document.getElementById('timeElapsed');
        let animationFrameId;

        function formatDateTime(timestamp) {
            const date = new Date(parseInt(timestamp));
            return date.toISOString().slice(0, 19);
        }

        function updateDisplay() {
            if (!startTime) {
                timeElapsedSpan.textContent = '00:00:00';
                progressPath.attr('d', progressArc.endAngle(0));
                return;
            }

            const elapsed = Date.now() - parseInt(startTime);
            const hours = Math.floor(elapsed / 3600000);
            const minutes = Math.floor((elapsed % 3600000) / 60000);
            const seconds = Math.floor((elapsed % 60000) / 1000);
            const progress = Math.min(hours + minutes/60 + seconds/3600, 24);

            timeElapsedSpan.textContent = `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
            const endAngle = (progress / 24) * 2 * Math.PI;
            progressPath.attr('d', progressArc.endAngle(endAngle));

            animationFrameId = requestAnimationFrame(updateDisplay);
        }

        function startFasting() {
            if (!startTime) {
                startTime = Date.now().toString();
                localStorage.setItem('fastingStartTime', startTime);
                updateButtonStates(true);
                updateDisplay();
            }
        }

        function resetFasting() {
            startTime = null;
            localStorage.removeItem('fastingStartTime');
            updateButtonStates(false);
            cancelAnimationFrame(animationFrameId);
            updateDisplay();
        }

        function updateButtonStates(fasting) {
            startBtn.textContent = fasting ? 'Fasting in Progress' : 'Start Fast';
            startBtn.disabled = fasting;
            editBtn.disabled = !fasting;
        }

        function toggleTimeEdit() {
            timeEdit.classList.toggle('visible');
            if (timeEdit.classList.contains('visible') && startTime) {
                startTimeInput.value = formatDateTime(startTime);
            }
        }

        function saveStartTime() {
            const newStartTime = new Date(startTimeInput.value).getTime();
            if (!isNaN(newStartTime)) {
                startTime = newStartTime.toString();
                localStorage.setItem('fastingStartTime', startTime);
                timeEdit.classList.remove('visible');
                updateDisplay();
            }
        }

        startBtn.addEventListener('click', startFasting);
        resetBtn.addEventListener('click', resetFasting);
        editBtn.addEventListener('click', toggleTimeEdit);
        saveTimeBtn.addEventListener('click', saveStartTime);

        if (startTime) {
            updateButtonStates(true);
            updateDisplay();
        } else {
            updateButtonStates(false);
            editBtn.disabled = true;
        }
    </script>
</body>
</html>