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Coffee_Brewing_Guide_Brew_Steps_Updated.html
Views: 19 | Author: deepfriedgalliform
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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
  <title>Coffee Brewing Guide</title>
  
  <!-- PWA Meta Tags & Manifest -->
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
  <meta name="apple-mobile-web-app-title" content="Brew Guide">
  <meta name="theme-color" content="#121214">
  <link rel="manifest" href="data:application/manifest+json;charset=utf-8,%7B%22name%22%3A%22Coffee%20Brewing%20Guide%22%2C%22short_name%22%3A%22BrewGuide%22%2C%22start_url%22%3A%22.%22%2C%22display%22%3A%22standalone%22%2C%22background_color%22%3A%22%23121214%22%2C%22theme_color%22%3A%22%23121214%22%2C%22icons%22%3A%5B%5D%7D">

  <script src="https://cdn.tailwindcss.com"></script>
  <script src="https://cdn.jsdelivr.net/npm/chart.js@4.5.1/dist/chart.umd.min.js"></script>
  <script>
    tailwind.config = {
      theme: {
        extend: {
          colors: {
            volvic: '#00A887',
            volvicDark: '#007A62',
            bronze: '#D4A373',
            gold: '#D4A359',
            switchClosed: '#E11D48',
            switchOpen: '#059669',
            darkBg: '#121214',
            cardBg: '#1A1A1E',
            borderDark: '#2A2A30'
          }
        }
      }
    }
  </script>
  <style>
    @import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');
    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      user-select: none;
      -webkit-tap-highlight-color: transparent;
      background-color: #121214;
    }

    .pulse-subtle {
      animation: pulse-slow 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    }

    @keyframes pulse-slow {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.8; }
    }
  </style>
</head>
<body class="bg-darkBg text-slate-100 min-h-screen flex flex-col justify-center items-center p-3 sm:p-4">

<!-- Main Application Card Container -->
<div class="w-full max-w-md bg-cardBg rounded-3xl border border-borderDark p-5 sm:p-6 shadow-2xl flex flex-col gap-5 relative overflow-hidden">
  
  <!-- ==================== 1. SETUP / RECIPE SCREEN ==================== -->
  <div id="setupScreen" class="flex flex-col gap-4 sm:gap-5">
    <!-- Header -->
    <div class="text-center pt-1">
      <h1 class="text-2xl font-extrabold tracking-tight text-white">Coffee Brewing Guide</h1>
    </div>

    <!-- Main Config Options Panel (User Inputs) -->
    <div class="bg-darkBg/60 border border-borderDark rounded-2xl p-3.5 sm:p-4 flex flex-col gap-4">
      
      <!-- Coffee Preset Selection Dropdown -->
      <div>
        <label for="coffeeSelect" class="text-[11px] font-semibold uppercase tracking-wider text-slate-400 mb-2 block">Coffee Profile</label>
        <div class="relative">
          <select id="coffeeSelect" onchange="updateSetupSpecs()" class="w-full bg-darkBg border border-borderDark rounded-xl p-3 text-sm font-medium text-white focus:outline-none focus:border-bronze appearance-none cursor-pointer pr-8">
            <optgroup label="Standard Roast Profiles">
              <option value="light_high">Light Roast / High Elevation</option>
              <option value="medium_light">Medium-Light Roast</option>
              <option value="medium_classic" selected>Medium Roast / Classic</option>
              <option value="dark_low">Dark Roast / Low Acidity</option>
            </optgroup>
            <optgroup label="Pact Coffee Profiles">
              <option value="pact_light">Pact Specialty Light</option>
              <option value="pact_fruit">Pact Fruit & Floral</option>
              <option value="pact_choc">Pact Chocolate & Nutty</option>
              <option value="pact_dark">Pact Dark Roast / Bold Espresso Blend</option>
            </optgroup>
            <optgroup label="Regional & Specialty Profiles">
              <option value="african_washed">African Washed (Yirgacheffe/Kenya)</option>
              <option value="central_american">Central American (Guatemala/Costa Rica)</option>
              <option value="natural_process">Natural Process (Eth/Bra)</option>
              <option value="sumatran_dark">Sumatran Dark / Pacific</option>
            </optgroup>
          </select>
          <div class="pointer-events-none absolute inset-y-0 right-0 flex items-center px-3 text-slate-400">
            <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"></path></svg>
          </div>
        </div>
      </div>

      <!-- Brew Method Selection Tabs -->
      <div>
        <label class="text-[11px] font-semibold uppercase tracking-wider text-slate-400 mb-2 block">Brew Method</label>
        <div class="grid grid-cols-2 sm:grid-cols-4 bg-darkBg p-1 rounded-xl border border-borderDark text-[11px] font-bold gap-1">
          <button id="btnMethodV60" onclick="setBrewMethod('v60')" class="py-2.5 rounded-lg transition-all bg-bronze text-slate-950 font-extrabold shadow-md text-center">
            V60
          </button>
          <button id="btnMethodSwitchHybrid" onclick="setBrewMethod('switch_hybrid')" class="py-2.5 rounded-lg transition-all text-slate-400 hover:text-white text-center">
            Switch Hybrid
          </button>
          <button id="btnMethodSwitchImmersion" onclick="setBrewMethod('switch_immersion')" class="py-2.5 rounded-lg transition-all text-slate-400 hover:text-white text-center">
            Switch Immersion
          </button>
          <button id="btnMethodClever" onclick="setBrewMethod('clever')" class="py-2.5 rounded-lg transition-all text-slate-400 hover:text-white text-center">
            Clever Dripper
          </button>
        </div>
      </div>

      <!-- Cup Size Selector -->
      <div>
        <label class="text-[11px] font-semibold uppercase tracking-wider text-slate-400 mb-2 block">Cup Size & Ratio (1:16.6)</label>
        <div class="grid grid-cols-2 bg-darkBg p-1 rounded-xl border border-borderDark text-xs font-bold gap-1">
          <button id="btn1Cup" onclick="setCupSize(1)" class="py-2.5 rounded-lg transition-all bg-bronze text-slate-950 font-extrabold shadow-md">
            1 Cup (15g / 250g)
          </button>
          <button id="btn2Cup" onclick="setCupSize(2)" class="py-2.5 rounded-lg transition-all text-slate-400 hover:text-white">
            2 Cups (30g / 500g)
          </button>
        </div>
      </div>

    </div>

    <!-- Recipe Summary & Specs Panel (Display Fields with Distinct Border) -->
    <div class="bg-darkBg/40 border border-bronze/30 rounded-2xl p-3.5 flex flex-col gap-3">
      <span class="text-[10px] font-bold uppercase tracking-wider text-bronze px-1">Recipe Specifications & Summary</span>
      
      <!-- Specs Grid Summary Cards -->
      <div class="grid grid-cols-2 gap-2.5">
        <div class="bg-darkBg/60 border border-borderDark p-3 rounded-2xl text-center">
          <span class="text-[10px] font-semibold uppercase tracking-wider text-slate-400 block">Dose</span>
          <span id="specDose" class="text-base font-extrabold text-white mt-0.5 block">15.0g</span>
        </div>
        <div class="bg-darkBg/60 border border-borderDark p-3 rounded-2xl text-center">
          <span class="text-[10px] font-semibold uppercase tracking-wider text-slate-400 block">Yield / Ratio</span>
          <span id="specWater" class="text-base font-extrabold text-white mt-0.5 block">250g (1:16.6)</span>
        </div>
        <div class="bg-darkBg/60 border border-borderDark p-3 rounded-2xl text-center">
          <span class="text-[10px] font-semibold uppercase tracking-wider text-slate-400 block">Temperature</span>
          <span id="specTemp" class="text-base font-extrabold text-white mt-0.5 block">91°C</span>
        </div>
        <div class="bg-darkBg/60 border border-borderDark p-3 rounded-2xl text-center flex flex-col justify-center items-center">
          <span class="text-[10px] font-semibold uppercase tracking-wider text-slate-400 block">Fellow Ode Gen 2</span>
          <span id="specOde" class="text-base font-extrabold text-white mt-0.5 block">Setting 6.0</span>
          <span id="specGrindTexture" class="text-[10px] font-medium text-slate-300 mt-1 bg-darkBg px-2 py-0.5 rounded-md border border-borderDark/60 block w-full truncate">Medium — Kosher Salt</span>
        </div>
      </div>

      <!-- Total Brew Time Card Inside Summary Panel -->
      <div class="bg-darkBg/60 border border-borderDark p-3 rounded-2xl text-center">
        <span class="text-[10px] font-semibold uppercase tracking-wider text-slate-400 block">Estimated Total Brew Time</span>
        <span id="specTotalTime" class="text-base font-extrabold text-bronze mt-0.5 block">03:00</span>
      </div>
    </div>

    <!-- Proceed Button -->
    <button onclick="goToPrepScreen()" class="w-full bg-bronze hover:bg-amber-600 text-slate-950 font-extrabold py-3.5 rounded-2xl text-base shadow-lg shadow-bronze/20 active:scale-[0.98] transition-all flex items-center justify-center gap-2 mt-1">
      <span>Proceed to Preparation</span>
      <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.5" d="M14 5l7 7m0 0l-7 7m7-7H3"></path></svg>
    </button>
  </div>

  <!-- ==================== 2. SELF-PACED PREPARE SCREEN ==================== -->
  <div id="prepScreen" class="hidden flex-col gap-3 sm:gap-4">
    <!-- Header without title bubble -->
    <div class="text-center pt-1">
      <h2 class="text-xl font-extrabold text-white">Pre-Brew Checklist</h2>
    </div>

    <!-- Preparation Checklist Card (Compact padding for single-view fit) -->
    <div class="bg-darkBg/80 border border-borderDark rounded-2xl p-3 flex flex-col gap-2.5">
      <div class="flex items-start gap-2.5 border-b border-borderDark/60 pb-2">
        <div class="w-5 h-5 rounded-full bg-bronze/20 text-bronze flex items-center justify-center text-[11px] font-black shrink-0">1</div>
        <div>
          <span class="text-[11px] font-bold text-white block">Boil Kettle</span>
          <p id="prepInstructionBoil" class="text-[11px] text-slate-300 mt-0.5">Boil water to required temperature.</p>
        </div>
      </div>

      <div class="flex items-start gap-2.5 border-b border-borderDark/60 pb-2">
        <div class="w-5 h-5 rounded-full bg-bronze/20 text-bronze flex items-center justify-center text-[11px] font-black shrink-0">2</div>
        <div>
          <span class="text-[11px] font-bold text-white block">Weigh Coffee Beans</span>
          <p id="prepInstructionWeigh" class="text-[11px] text-slate-300 mt-0.5">Weigh coffee beans accurately on scale.</p>
        </div>
      </div>

      <div class="flex items-start gap-2.5 border-b border-borderDark/60 pb-2">
        <div class="w-5 h-5 rounded-full bg-bronze/20 text-bronze flex items-center justify-center text-[11px] font-black shrink-0">3</div>
        <div>
          <span class="text-[11px] font-bold text-white block">Grind Coffee</span>
          <p id="prepInstructionGrind" class="text-[11px] text-slate-300 mt-0.5">Grind on Fellow Ode Gen 2.</p>
        </div>
      </div>

      <div class="flex items-start gap-2.5 border-b border-borderDark/60 pb-2">
        <div class="w-5 h-5 rounded-full bg-bronze/20 text-bronze flex items-center justify-center text-[11px] font-black shrink-0">4</div>
        <div>
          <span class="text-[11px] font-bold text-white block">Rinse Filter Paper & Preheat</span>
          <p class="text-[11px] text-slate-300 mt-0.5">Rinse paper filter with hot water, then discard rinse water.</p>
        </div>
      </div>

      <div id="prepStep5" class="flex items-start gap-2.5 border-b border-borderDark/60 pb-2">
        <div class="w-5 h-5 rounded-full bg-bronze/20 text-bronze flex items-center justify-center text-[11px] font-black shrink-0">5</div>
        <div>
          <span id="prepStep5Title" class="text-[11px] font-bold text-white block">Add Grounds & Flatten Bed</span>
          <p id="prepStep5Desc" class="text-[11px] text-slate-300 mt-0.5">Add ground coffee to filter, tap level, and tare scale.</p>
        </div>
      </div>

      <div class="flex items-start gap-2.5">
        <div class="w-5 h-5 rounded-full bg-bronze/20 text-bronze flex items-center justify-center text-[11px] font-black shrink-0">6</div>
        <div>
          <span class="text-[11px] font-bold text-white block">Ready to Start</span>
          <p class="text-[11px] text-slate-300 mt-0.5">Review recipe overview below, then press Start.</p>
        </div>
      </div>
    </div>

    <!-- Integrated Recipe Overview Header -->
    <div id="recipeOverviewCard" class="w-full bg-darkBg/80 border border-borderDark rounded-2xl p-3 flex flex-col gap-2">
      <div class="flex items-center justify-between border-b border-borderDark/60 pb-1.5">
        <span class="text-[10px] font-bold uppercase tracking-wider text-bronze flex items-center gap-1">
          <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 002-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2"></path></svg>
          Recipe Overview
        </span>
        <div class="flex items-center gap-2">
          <span id="overviewTotalWater" class="text-[10px] font-bold text-slate-300">Yield: 250g</span>
          <span id="overviewTotalTime" class="text-[10px] font-extrabold text-white bg-bronze/20 border border-bronze/40 px-2 py-0.5 rounded-md">Time: 03:15</span>
        </div>
      </div>
      <div id="overviewList" class="flex flex-col gap-1 text-[11px] text-slate-300 max-h-48 overflow-y-auto pr-1">
        <!-- Steps inserted via JS -->
      </div>
    </div>

    <!-- Navigation Buttons -->
    <div class="grid grid-cols-3 gap-2.5 w-full">
      <button onclick="goToSetupScreen()" class="col-span-1 bg-darkBg hover:bg-borderDark text-slate-300 font-bold py-3 rounded-2xl border border-borderDark text-xs transition-all flex items-center justify-center gap-1">
        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7"></path></svg>
        <span>Setup</span>
      </button>
      <button onclick="startCountdown()" class="col-span-2 bg-volvic hover:bg-volvicDark text-white font-extrabold py-3 rounded-2xl text-sm shadow-lg shadow-volvic/20 active:scale-[0.98] transition-all flex items-center justify-center gap-2">
        <span>Start Brew Cycle</span>
        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.5" d="M14 5l7 7m0 0l-7 7m7-7H3"></path></svg>
      </button>
    </div>
  </div>

  <!-- ==================== 2.5. GET READY COUNTDOWN SCREEN ==================== -->
  <div id="countdownScreen" class="hidden flex-col items-center justify-center text-center gap-6 py-12">
    <span class="px-3.5 py-1.5 rounded-full text-xs font-extrabold tracking-widest uppercase border bg-bronze/15 text-bronze border-bronze/40 animate-pulse">
      Get Ready
    </span>
    <div class="flex flex-col items-center gap-2">
      <span id="countdownNumber" class="text-8xl sm:text-9xl font-black text-white tabular-nums tracking-tighter">10</span>
      <p class="text-xs text-slate-400 mt-2">Get your kettle ready and tare your scale...</p>
    </div>
    <button onclick="skipCountdown()" class="text-xs font-bold text-slate-400 hover:text-white underline underline-offset-4 mt-4 py-2">
      Skip Countdown & Start Now
    </button>
  </div>

  <!-- ==================== 3. ACTIVE BREW TIMER & LINE CHART ==================== -->
  <div id="brewScreen" class="hidden flex-col items-center gap-3 sm:gap-4">
    
    <!-- Unified Status Header Bubble -->
    <div class="w-full flex flex-col items-center gap-2">
      <div id="unifiedStatusBubble" class="w-full px-4 py-3 sm:py-4 rounded-2xl border bg-volvic/15 border-volvic/40 text-center flex flex-col items-center justify-center gap-1.5 transition-all duration-300">
        <span id="phaseBadge" class="text-xs font-extrabold tracking-widest uppercase text-volvic">
          BLOOM PHASE
        </span>
        <span id="unifiedInstruction" class="text-base sm:text-lg font-extrabold text-white leading-snug">
          Pour to 50g at ~4.2 g/s
        </span>
      </div>

      <div id="valveBadge" class="px-3 py-1 rounded-lg text-xs font-black tracking-widest uppercase transition-all duration-300 bg-switchOpen/20 text-emerald-400 border border-emerald-500/40 hidden">
        VALVE OPEN 🔓
      </div>
    </div>

    <!-- Line Chart Container (Weight Over Time vs Target Profile) -->
    <div class="w-full bg-darkBg/90 border border-borderDark rounded-2xl p-3 flex flex-col items-center justify-center">
      <div class="w-full h-48 relative">
        <canvas id="brewChartCanvas"></canvas>
      </div>
      
      <!-- Live Metrics Display Below Chart (Step Timer, Target Water, and Integrated Total Brew Time) -->
      <div class="flex flex-col gap-2 w-full mt-2.5">
        <div class="grid grid-cols-2 gap-2 w-full">
          <div class="bg-cardBg/80 border border-borderDark/80 p-2 rounded-xl text-center">
            <span class="text-[9px] text-slate-400 font-bold uppercase tracking-wider block">Step Timer</span>
            <span id="timerSeconds" class="text-2xl font-black text-white tabular-nums leading-none mt-1 block">45s</span>
          </div>
          <div class="bg-cardBg/80 border border-borderDark/80 p-2 rounded-xl text-center">
            <span class="text-[9px] text-slate-400 font-bold uppercase tracking-wider block">Target Water</span>
            <span id="targetWater" class="text-2xl font-black text-bronze tabular-nums leading-none mt-1 block">50g</span>
          </div>
        </div>
        <!-- Integrated Total Brew Time Card -->
        <div class="bg-cardBg/80 border border-borderDark/80 p-2.5 rounded-xl flex items-center justify-between px-4">
          <div class="flex items-center gap-2">
            <span class="w-2 h-2 rounded-full bg-volvic animate-pulse"></span>
            <span class="text-[10px] text-slate-400 font-bold uppercase tracking-wider">Total Brew Time</span>
          </div>
          <span id="totalElapsedTimer" class="text-lg font-black text-white font-mono tracking-tight">00:00</span>
        </div>
      </div>
    </div>

    <!-- Step Title & Description -->
    <div class="text-center px-2 w-full">
      <h2 id="stepTitle" class="text-base font-bold text-white">The Bloom</h2>
      <p id="stepDesc" class="text-xs text-slate-400 mt-0.5 min-h-[30px] leading-relaxed">Gentle spiral pour to saturate all grounds evenly.</p>
    </div>

    <!-- Next Step Preview Badge -->
    <div class="w-full bg-darkBg/60 border border-borderDark rounded-xl p-2.5 flex items-center justify-between text-xs text-slate-400">
      <span class="font-bold text-[10px] uppercase tracking-wider text-slate-500">Next:</span>
      <span id="nextStepTitle" class="font-semibold text-slate-200 truncate">First Main Pour (150g)</span>
    </div>

    <!-- Controls Row -->
    <div class="grid grid-cols-3 gap-2.5 w-full mt-0.5">
      <button onclick="prevStep()" class="bg-darkBg hover:bg-borderDark text-slate-300 font-bold py-3.5 px-3 rounded-xl border border-borderDark active:scale-95 transition-all text-xs flex items-center justify-center gap-1">
        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7"></path></svg>
        <span>Back</span>
      </button>
      <button id="btnPause" onclick="togglePause()" class="bg-volvic hover:bg-volvicDark text-white font-extrabold py-3.5 px-3 rounded-xl border border-volvic/30 active:scale-95 transition-all text-sm flex items-center justify-center gap-1">
        <span>Pause</span>
      </button>
      <button onclick="nextStep()" class="bg-darkBg hover:bg-borderDark text-slate-300 font-bold py-3.5 px-3 rounded-xl border border-borderDark active:scale-95 transition-all text-xs flex items-center justify-center gap-1">
        <span>Skip</span>
        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"></path></svg>
      </button>
    </div>
    <button onclick="cancelBrew()" class="w-full bg-rose-950/50 hover:bg-rose-900/70 text-rose-300 font-extrabold py-3.5 px-4 rounded-xl border border-rose-500/40 active:scale-[0.98] transition-all text-xs flex items-center justify-center gap-2">
      <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 6l12 12M18 6L6 18"></path></svg>
      Cancel Brew
    </button>
  </div>

  <!-- ==================== 4. COMPLETION SUMMARY SCREEN ==================== -->
  <div id="summaryScreen" class="hidden flex-col gap-5">
    <div class="text-center">
      <div class="inline-flex items-center justify-center w-12 h-12 bg-volvic/20 text-volvic rounded-full mb-2">
        <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.5" d="M5 13l4 4L19 7"></path></svg>
      </div>
      <h2 class="text-2xl font-extrabold text-white">Brew Complete!</h2>
      <p id="summaryFinalTime" class="text-xs font-bold text-bronze mt-1">Total Brew Time: 00:00</p>
    </div>

    <!-- Tasting Profile Card -->
    <div class="bg-darkBg/60 border border-borderDark rounded-2xl p-4">
      <h3 class="text-xs font-bold uppercase tracking-wider text-bronze mb-1.5 flex items-center gap-1.5">
        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 6.253v13m0-13C10.832 5.477 9.246 5 7.5 5S4.168 5.477 3 6.253v13C4.168 18.477 5.754 18 7.5 18s3.332.477 4.5 1.253m0-13C13.168 5.477 14.754 5 16.5 5c1.747 0 3.332.477 4.5 1.253v13C19.832 18.477 18.247 18 16.5 18c-1.746 0-3.332.477-4.5 1.253"></path></svg>
        <span>Expected Tasting Profile</span>
      </h3>
      <p id="tastingNotes" class="text-xs text-slate-300 leading-relaxed">--</p>
    </div>

    <!-- Extraction Diagnostic Card -->
    <div class="bg-darkBg/60 border border-borderDark rounded-2xl p-4">
      <h3 class="text-xs font-bold uppercase tracking-wider text-rose-400 mb-1.5 flex items-center gap-1.5">
        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"></path></svg>
        <span>Extraction Check</span>
      </h3>
      <p id="diagnosticAdvice" class="text-xs text-slate-300 leading-relaxed">
        If your cup tastes bitter or chalky, adjust Fellow Ode Gen 2 setting slightly coarser (+1 click) for your next brew.
      </p>
    </div>

    <button onclick="resetApp()" class="w-full bg-volvic hover:bg-volvicDark text-white font-extrabold py-3.5 rounded-2xl text-base shadow-lg shadow-volvic/20 active:scale-[0.98] transition-all">
      Brew Another Cup
    </button>
  </div>

</div>

<script>
  // Service Worker Registration for PWA Offline Support
  if ('serviceWorker' in navigator) {
    window.addEventListener('load', () => {
      const swCode = `self.addEventListener('fetch', e => {});`;
      const blob = new Blob([swCode], { type: 'text/javascript' });
      const swUrl = URL.createObjectURL(blob);
      navigator.serviceWorker.register(swUrl).catch(() => {});
    });
  }

  // Complete Database for Coffee Profiles & Fellow Ode Gen 2 Calibrations
  const coffeeData = {
    light_high: { temp: "96°C", notes: "Bright jasmine florals, sparkling citrus acidity, and clean tea-like sweetness.", ode: 5.1 },
    medium_light: { temp: "93°C", notes: "Vibrant stone fruit, red berry notes, and refined cane sugar sweetness.", ode: 5.2 },
    medium_classic: { temp: "91°C", notes: "Balanced caramel sweetness, milk chocolate, rounded apple acidity, and smooth finish.", ode: 6.0 },
    dark_low: { temp: "85°C", notes: "Deep dark chocolate, smoky molasses, low acidity, and heavy velvety body.", ode: 6.3 },
    
    pact_light: { temp: "93°C", notes: "Elegantly light body with crisp bergamot, honeysuckle, and stone fruit complexity.", ode: 5.2 },
    pact_fruit: { temp: "94°C", notes: "Juicy raspberry, ripe peach notes, tropical sweetness, and floral aromas.", ode: 5.1 },
    pact_choc: { temp: "92°C", notes: "Comforting hazelnut praline, milk chocolate, toasted oats, and balanced caramel body.", ode: 6.0 },
    pact_dark: { temp: "88°C", notes: "Rich cocoa nibs, dark treacle, robust crema character, and lingering spiced finish.", ode: 6.2 },
    
    african_washed: { temp: "96°C", notes: "High elevation Ethiopian/Kenyan character with lemongrass, black tea, and intense citrus clarity.", ode: 5.0 },
    central_american: { temp: "92°C", notes: "Smooth honey sweetness, red apple, roasted almond, and clean balanced finish.", ode: 6.0 },
    natural_process: { temp: "90°C", notes: "Complex anaerobic fermentation notes, dried mango, blueberry jam, and winey sweetness.", ode: 5.3 },
    sumatran_dark: { temp: "86°C", notes: "Earthy, cedary, dark chocolate, low acidity, and full syrup-like mouthfeel.", ode: 6.3 }
  };

  function getGrindTextureLabel(setting) {
    if (setting < 5.3) return "Medium-Fine — Table Salt";
    if (setting <= 6.5) return "Medium — Kosher Salt";
    if (setting <= 7.2) return "Medium-Coarse — Coarse Salt";
    return "Coarse — Rough Sea Salt";
  }

  function formatTime(totalSeconds) {
    const mins = Math.floor(totalSeconds / 60);
    const secs = totalSeconds % 60;
    return `${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`;
  }

  function generateSteps(method, cups) {
    const scale = cups === 2 ? 2 : 1;
    const targetTotalWater = 250 * scale;

    if (method === 'v60') {
      if (cups === 1) {
        return [
          { title: "Bloom Pour", time: 12, pourTime: 12, water: 50, flow: "~4.2 g/s", desc: "Pour water in gentle spirals to 50g at ~4.2 g/s.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at ~4.2 g/s.", valve: null },
          { title: "Bloom Rest", time: 33, pourTime: 0, water: 50, flow: "Resting", desc: "Let the coffee bloom and release trapped CO2 gases.", phase: "bloom", restBadge: "BLOOM REST", restInstruction: "Let the coffee bloom.", valve: null },
          { title: "First Main Pour", time: 20, pourTime: 20, water: 150, flow: "~5.0 g/s", desc: "Pour in smooth concentric spirals to 150g at ~5.0 g/s.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at ~5.0 g/s.", valve: null },
          { title: "First Main Wait", time: 25, pourTime: 0, water: 150, flow: "Resting", desc: "Let the water level drop slightly into the bed.", phase: "pour", restBadge: "WAIT", restInstruction: "Let bed settle.", valve: null },
          { title: "Final Pour", time: 20, pourTime: 20, water: 250, flow: "~5.0 g/s", desc: "Pour to 250g target at ~5.0 g/s, give one gentle swirl.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at ~5.0 g/s.", valve: null },
          { title: "Final Drawdown", time: 70, pourTime: 0, water: 250, flow: "Percolation drain", desc: "Allow the coffee to drain fully through the filter.", phase: "drawdown", restBadge: "DRAWDOWN", restInstruction: "Allow coffee to drain.", valve: null }
        ];
      } else {
        return [
          { title: "Bloom Pour", time: 15, pourTime: 15, water: 100, flow: "6.7 g/s", desc: "Pour in gentle spirals to 100g at 6.7 g/s.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at 6.7 g/s.", valve: null },
          { title: "Bloom Rest", time: 30, pourTime: 0, water: 100, flow: "Resting", desc: "Let the coffee bloom and release CO2.", phase: "bloom", restBadge: "BLOOM REST", restInstruction: "Let the coffee bloom.", valve: null },
          { title: "First Main Pour", time: 30, pourTime: 30, water: 300, flow: "6.7 g/s", desc: "Pour smoothly to 300g at 6.7 g/s.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at 6.7 g/s.", valve: null },
          { title: "First Main Wait", time: 20, pourTime: 0, water: 300, flow: "Resting", desc: "Let the bed settle before final fill.", phase: "pour", restBadge: "WAIT", restInstruction: "Let bed settle.", valve: null },
          { title: "Final Pour", time: 29, pourTime: 29, water: 500, flow: "6.9 g/s", desc: "Pour to 500g target at 6.9 g/s, give one gentle swirl.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at 6.9 g/s.", valve: null },
          { title: "Final Drawdown", time: 86, pourTime: 0, water: 500, flow: "Percolation drain", desc: "Allow the larger batch to drain fully.", phase: "drawdown", restBadge: "DRAWDOWN", restInstruction: "Allow coffee to drain.", valve: null }
        ];
      }
    } else if (method === 'switch_hybrid') {
      if (cups === 1) {
        return [
          { title: "Open Bloom Pour", time: 12, pourTime: 12, water: 50, flow: "~4.2 g/s", desc: "Valve open. Pour bloom water to 50g at ~4.2 g/s.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at ~4.2 g/s.", valve: "open" },
          { title: "Open Bloom Rest", time: 33, pourTime: 0, water: 50, flow: "Resting", desc: "Valve open. Allow coffee to bloom.", phase: "bloom", restBadge: "BLOOM REST", restInstruction: "Let coffee bloom.", valve: "open" },
          { title: "Close Valve & Steep Pour", time: 20, pourTime: 20, water: 250, flow: "~10.0 g/s", desc: "Close valve, then pour to 250g at ~10.0 g/s.", phase: "steep", restBadge: "POURING", restInstruction: "Pour at ~10.0 g/s.", valve: "closed" },
          { title: "Immersion Steep Phase", time: 70, pourTime: 0, water: 250, flow: "Steeping", desc: "Valve closed. Steep undisturbed.", phase: "steep", restBadge: "IMMERSION STEEP", restInstruction: "Steep with valve closed.", valve: "closed" },
          { title: "Release Valve & Drawdown", time: 45, pourTime: 0, water: 250, flow: "Immersion drain", desc: "Open valve and let coffee drain into server.", phase: "drawdown", restBadge: "DRAWDOWN", restInstruction: "Open valve to drain.", valve: "open" }
        ];
      } else {
        return [
          { title: "Open Bloom Pour", time: 15, pourTime: 15, water: 100, flow: "6.7 g/s", desc: "Valve open. Pour larger bloom to 100g at 6.7 g/s.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at 6.7 g/s.", valve: "open" },
          { title: "Open Bloom Rest", time: 30, pourTime: 0, water: 100, flow: "Resting", desc: "Valve open. Allow coffee to bloom.", phase: "bloom", restBadge: "BLOOM REST", restInstruction: "Let coffee bloom.", valve: "open" },
          { title: "Close Valve & Steep Pour", time: 30, pourTime: 30, water: 500, flow: "~13.3 g/s", desc: "Close valve, pour smoothly to 500g at ~13.3 g/s.", phase: "steep", restBadge: "POURING", restInstruction: "Pour at ~13.3 g/s.", valve: "closed" },
          { title: "Immersion Steep Phase", time: 90, pourTime: 0, water: 500, flow: "Steeping", desc: "Valve closed. Steep for proper extraction.", phase: "steep", restBadge: "IMMERSION STEEP", restInstruction: "Steep with valve closed.", valve: "closed" },
          { title: "Release Valve & Drawdown", time: 60, pourTime: 0, water: 500, flow: "Immersion drain", desc: "Open valve and let larger volume drain.", phase: "drawdown", restBadge: "DRAWDOWN", restInstruction: "Open valve to drain.", valve: "open" }
        ];
      }
    } else if (method === 'switch_immersion') {
      if (cups === 1) {
        return [
          { title: "Closed Full Steep Pour", time: 25, pourTime: 25, water: 250, flow: "~10.0 g/s", desc: "Keep valve closed and pour to 250g at ~10.0 g/s.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at ~10.0 g/s.", valve: "closed" },
          { title: "Settle Phase", time: 5, pourTime: 0, water: 250, flow: "Resting", desc: "Let coffee settle before steeping begins.", phase: "pour", restBadge: "SETTLE", restInstruction: "Let bed settle.", valve: "closed" },
          { title: "Immersion Steep Phase", time: 120, pourTime: 0, water: 250, flow: "Steeping", desc: "Keep valve closed while coffee steeps.", phase: "steep", restBadge: "IMMERSION STEEP", restInstruction: "Steep with valve closed.", valve: "closed" },
          { title: "Release Valve & Drawdown", time: 60, pourTime: 0, water: 250, flow: "Immersion drain", desc: "Open valve and allow coffee to drain fully.", phase: "drawdown", restBadge: "DRAWDOWN", restInstruction: "Open valve to drain.", valve: "open" }
        ];
      } else {
        return [
          { title: "Closed Full Steep Pour", time: 35, pourTime: 35, water: 500, flow: "~20.0 g/s", desc: "Keep valve closed and pour to 500g at ~20.0 g/s.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at ~20.0 g/s.", valve: "closed" },
          { title: "Settle Phase", time: 5, pourTime: 0, water: 500, flow: "Resting", desc: "Let larger bed settle.", phase: "pour", restBadge: "SETTLE", restInstruction: "Let bed settle.", valve: "closed" },
          { title: "Immersion Steep Phase", time: 120, pourTime: 0, water: 500, flow: "Steeping", desc: "Keep valve closed while coffee steeps.", phase: "steep", restBadge: "IMMERSION STEEP", restInstruction: "Steep with valve closed.", valve: "closed" },
          { title: "Release Valve & Drawdown", time: 90, pourTime: 0, water: 500, flow: "Immersion drain", desc: "Open valve and allow larger volume to drain.", phase: "drawdown", restBadge: "DRAWDOWN", restInstruction: "Open valve to drain.", valve: "open" }
        ];
      }
    } else { // Clever Dripper (Water-First approach)
      if (cups === 1) {
        return [
          { title: "Water-First Pour", time: 25, pourTime: 25, water: 250, flow: "~10.0 g/s", desc: "Keep valve closed. Pour 250g water first at ~10.0 g/s.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at ~10.0 g/s.", valve: "closed" },
          { title: "Water Rest", time: 5, pourTime: 0, water: 250, flow: "Resting", desc: "Water in place, get ready to add coffee grounds.", phase: "pour", restBadge: "READY", restInstruction: "Add coffee on top.", valve: "closed" },
          { title: "Add Coffee & Full Steep", time: 120, pourTime: 0, water: 250, flow: "Steeping", desc: "Add coffee on top. At 1:30, gently break crust with one stir.", phase: "steep", cueAt: 90, cueDuration: 8, cueInstruction: "Give coffee crust one gentle stir.", restBadge: "IMMERSION STEEP", restInstruction: "Steep with valve closed.", valve: "closed" },
          { title: "Place on Vessel & Drawdown", time: 60, pourTime: 0, water: 250, flow: "Automatic release", desc: "Place dripper onto server to release coffee.", phase: "drawdown", restBadge: "DRAWDOWN", restInstruction: "Place on server to drain.", valve: "open" }
        ];
      } else {
        return [
          { title: "Water-First Pour", time: 35, pourTime: 35, water: 500, flow: "~20.0 g/s", desc: "Keep valve closed. Pour 500g water first at ~20.0 g/s.", phase: "pour", restBadge: "POURING", restInstruction: "Pour at ~20.0 g/s.", valve: "closed" },
          { title: "Water Rest", time: 5, pourTime: 0, water: 500, flow: "Resting", desc: "Water in place, get ready to add coffee grounds.", phase: "pour", restBadge: "READY", restInstruction: "Add coffee on top.", valve: "closed" },
          { title: "Add Coffee & Full Steep", time: 180, pourTime: 0, water: 500, flow: "Steeping", desc: "Add coffee on top. At 2:00, gently break crust with one stir.", phase: "steep", cueAt: 120, cueDuration: 10, cueInstruction: "Give larger coffee crust one gentle stir.", restBadge: "IMMERSION STEEP", restInstruction: "Steep with valve closed.", valve: "closed" },
          { title: "Place on Vessel & Drawdown", time: 90, pourTime: 0, water: 500, flow: "Automatic release", desc: "Place dripper onto server to release coffee smoothly.", phase: "drawdown", restBadge: "DRAWDOWN", restInstruction: "Place on server to drain.", valve: "open" }
        ];
      }
    }
  }

  // State Variables
  let currentMethod = 'v60';
  let currentCups = 1;
  let currentStepIdx = 0;
  let remainingStepTime = 0;
  let totalElapsedSeconds = 0;
  let isPaused = false;
  let timerInterval = null;
  let countdownInterval = null;
  let remainingCountdown = 10;
  let wakeLock = null;
  
  let brewChart = null;
  let targetProfileData = [];
  let actualProfileData = [];

  async function requestWakeLock() {
    if (!('wakeLock' in navigator) || document.visibilityState !== 'visible') return;
    try {
      if (wakeLock) return;
      wakeLock = await navigator.wakeLock.request('screen');
      wakeLock.addEventListener('release', () => { wakeLock = null; });
    } catch (e) {
      wakeLock = null;
    }
  }

  async function releaseWakeLock() {
    if (!wakeLock) return;
    try { await wakeLock.release(); } catch (e) {}
    wakeLock = null;
  }

  document.addEventListener('visibilitychange', () => {
    if (document.visibilityState === 'visible' && !document.getElementById('brewScreen').classList.contains('hidden')) {
      requestWakeLock();
    }
  });

  let audioCtx = null;
  function initAudio() {
    if (!audioCtx) {
      audioCtx = new (window.AudioContext || window.webkitAudioContext)();
    }
    if (audioCtx.state === 'suspended') {
      audioCtx.resume();
    }
  }

  function playChime() {
    try {
      initAudio();
      const osc = audioCtx.createOscillator();
      const gain = audioCtx.createGain();
      osc.type = 'sine';
      osc.frequency.setValueAtTime(880, audioCtx.currentTime);
      gain.gain.setValueAtTime(0.3, audioCtx.currentTime);
      gain.gain.exponentialRampToValueAtTime(0.001, audioCtx.currentTime + 0.6);
      osc.connect(gain);
      gain.connect(audioCtx.destination);
      osc.start();
      osc.stop(audioCtx.currentTime + 0.6);
    } catch(e){}
  }

  function triggerVibration() {
    if ('vibrate' in navigator) {
      try { navigator.vibrate([200, 100, 200]); } catch(e){}
    }
  }

  function setBrewMethod(method) {
    currentMethod = method;
    const btnV60 = document.getElementById('btnMethodV60');
    const btnSwitchHybrid = document.getElementById('btnMethodSwitchHybrid');
    const btnSwitchImmersion = document.getElementById('btnMethodSwitchImmersion');
    const btnClever = document.getElementById('btnMethodClever');

    const activeClass = "py-2.5 rounded-lg transition-all bg-bronze text-slate-950 font-extrabold shadow-md text-center";
    const inactiveClass = "py-2.5 rounded-lg transition-all text-slate-400 hover:text-white text-center";

    btnV60.className = method === 'v60' ? activeClass : inactiveClass;
    btnSwitchHybrid.className = method === 'switch_hybrid' ? activeClass : inactiveClass;
    btnSwitchImmersion.className = method === 'switch_immersion' ? activeClass : inactiveClass;
    btnClever.className = method === 'clever' ? activeClass : inactiveClass;

    updateSetupSpecs();
  }

  function setCupSize(size) {
    currentCups = size;
    const btn1 = document.getElementById('btn1Cup');
    const btn2 = document.getElementById('btn2Cup');

    if (size === 1) {
      btn1.className = "py-2.5 rounded-lg transition-all bg-bronze text-slate-950 font-extrabold shadow-md";
      btn2.className = "py-2.5 rounded-lg transition-all text-slate-400 hover:text-white";
    } else {
      btn2.className = "py-2.5 rounded-lg transition-all bg-bronze text-slate-950 font-extrabold shadow-md";
      btn1.className = "py-2.5 rounded-lg transition-all text-slate-400 hover:text-white";
    }
    updateSetupSpecs();
  }

  function getCalculatedOdeSetting() {
    const key = document.getElementById('coffeeSelect').value;
    const data = coffeeData[key] || coffeeData['medium_classic'];
    let calculatedOde = data.ode;

    if (currentMethod === 'switch_hybrid') {
      calculatedOde += 0.2;
    } else if (currentMethod === 'switch_immersion' || currentMethod === 'clever') {
      calculatedOde += 0.5;
    }

    if (currentCups === 2) {
      calculatedOde += 1.0;
    }

    return calculatedOde;
  }

  function updateSetupSpecs() {
    const key = document.getElementById('coffeeSelect').value;
    const data = coffeeData[key] || coffeeData['medium_classic'];
    const calculatedOde = getCalculatedOdeSetting();

    document.getElementById('specTemp').innerText = data.temp;
    document.getElementById('specOde').innerText = `Setting ${calculatedOde.toFixed(1)}`;
    document.getElementById('specGrindTexture').innerText = getGrindTextureLabel(calculatedOde);
    document.getElementById('specDose').innerText = currentCups === 1 ? "15.0g" : "30.0g";
    document.getElementById('specWater').innerText = currentCups === 1 ? "250g (1:16.6)" : "500g (1:16.6)";

    const steps = generateSteps(currentMethod, currentCups);
    let totalSeconds = 0;
    steps.forEach(s => totalSeconds += s.time);
    document.getElementById('specTotalTime').innerText = formatTime(totalSeconds);
  }

  function goToPrepScreen() {
    const key = document.getElementById('coffeeSelect').value;
    const data = coffeeData[key] || coffeeData['medium_classic'];
    const calculatedOde = getCalculatedOdeSetting();
    const waterGrams = currentCups === 1 ? 250 : 500;
    const doseGrams = currentCups === 1 ? "15.0g" : "30.0g";

    document.getElementById('prepInstructionBoil').innerText = `Boil at least ${waterGrams}ml water to ${data.temp}.`;
    document.getElementById('prepInstructionWeigh').innerText = `Weigh ${doseGrams} coffee beans.`;
    document.getElementById('prepInstructionGrind').innerText = `Grind to ${calculatedOde.toFixed(1)} on Fellow Ode Gen 2 (${getGrindTextureLabel(calculatedOde)}).`;

    const step5Title = document.getElementById('prepStep5Title');
    const step5Desc = document.getElementById('prepStep5Desc');
    if (currentMethod === 'clever') {
      step5Title.innerText = "Weigh Water into Brewer First";
      step5Desc.innerText = `Place filter in Clever Dripper off the vessel, ensure valve is closed, and pour ${waterGrams}g water directly into the brewer. Keep ground coffee separate until timer starts.`;
    } else {
      step5Title.innerText = "Add Grounds & Flatten Bed";
      step5Desc.innerText = "Add ground coffee to filter, tap gently to level bed, and tare scale to 0.0g.";
    }

    populateRecipeOverview();

    document.getElementById('setupScreen').classList.add('hidden');
    document.getElementById('prepScreen').classList.remove('hidden');
    document.getElementById('prepScreen').classList.add('flex');
  }

  function goToSetupScreen() {
    document.getElementById('prepScreen').classList.add('hidden');
    document.getElementById('prepScreen').classList.remove('flex');
    document.getElementById('setupScreen').classList.remove('hidden');
  }

  function populateRecipeOverview() {
    const steps = generateSteps(currentMethod, currentCups);
    const overviewList = document.getElementById('overviewList');
    const overviewTotalWater = document.getElementById('overviewTotalWater');
    const overviewTotalTime = document.getElementById('overviewTotalTime');
    
    overviewList.innerHTML = '';
    
    let totalSeconds = 0;
    steps.forEach(s => totalSeconds += s.time);

    overviewTotalWater.innerText = `Yield: ${currentCups === 1 ? 250 : 500}g`;
    overviewTotalTime.innerText = `Time: ${formatTime(totalSeconds)}`;

    steps.forEach((s, i) => {
      const item = document.createElement('div');
      item.className = "flex items-center justify-between border-b border-borderDark/30 pb-0.5 pt-0.5 text-[10px]";
      
      let valveTag = '';
      if (s.valve === 'open') {
        valveTag = `<span class="text-emerald-400 font-bold ml-1">[🔓 Open]</span>`;
      } else if (s.valve === 'closed') {
        valveTag = `<span class="text-rose-400 font-bold ml-1">[🔒 Closed]</span>`;
      }

      item.innerHTML = `
        <div class="flex items-center gap-1 truncate pr-2">
          <span class="text-bronze font-bold">${i + 1}.</span>
          <span class="font-medium text-slate-200 truncate">${s.title}</span>
          ${valveTag}
        </div>
        <div class="flex items-center gap-1.5 whitespace-nowrap">
          <span class="font-bold text-white">${s.water}g</span>
          <span class="text-[9px] text-slate-400">(${s.time}s)</span>
        </div>
      `;
      overviewList.appendChild(item);
    });
  }

  function generateTargetProfile() {
    const steps = generateSteps(currentMethod, currentCups);
    targetProfileData = [{ x: 0, y: 0 }];
    
    let t = 0;
    let prevWater = 0;

    steps.forEach(s => {
      const targetWater = s.water;
      const pourT = s.pourTime || 0;
      const stepDuration = s.time;

      for (let sec = 1; sec <= stepDuration; sec++) {
        t++;
        let currentW = prevWater;
        if (pourT > 0 && sec <= pourT) {
          currentW = prevWater + ((targetWater - prevWater) * (sec / pourT));
        } else {
          currentW = targetWater;
        }
        targetProfileData.push({ x: t, y: Math.round(currentW * 10) / 10 });
      }
      prevWater = targetWater;
    });

    actualProfileData = [{ x: 0, y: 0 }];
  }

  function initChart() {
    const ctx = document.getElementById('brewChartCanvas').getContext('2d');
    if (brewChart) {
      brewChart.destroy();
    }

    const maxY = currentCups === 1 ? 275 : 550;

    brewChart = new Chart(ctx, {
      type: 'line',
      data: {
        datasets: [
          {
            label: 'Target Profile',
            data: targetProfileData,
            borderColor: '#D4A373',
            borderWidth: 2,
            borderDash: [5, 5],
            pointRadius: 0,
            fill: false,
            tension: 0.1
          },
          {
            label: 'Live Brew',
            data: actualProfileData,
            borderColor: '#00A887',
            backgroundColor: 'rgba(0, 168, 135, 0.15)',
            borderWidth: 3,
            pointRadius: 0,
            fill: true,
            tension: 0.1
          }
        ]
      },
      options: {
        responsive: true,
        maintainAspectRatio: false,
        animation: false,
        scales: {
          x: {
            type: 'linear',
            title: { display: true, text: 'Time (s)', color: '#94A3B8', font: { size: 10 } },
            ticks: { color: '#64748B', font: { size: 9 } },
            grid: { color: '#2A2A30' }
          },
          y: {
            min: 0,
            max: maxY,
            title: { display: true, text: 'Weight (g)', color: '#94A3B8', font: { size: 10 } },
            ticks: { color: '#64748B', font: { size: 9 } },
            grid: { color: '#2A2A30' }
          }
        },
        plugins: {
          legend: {
            display: true,
            position: 'top',
            labels: { 
              color: '#CBD5E1', 
              font: { size: 10, weight: 'bold' }, 
              usePointStyle: true,
              pointStyle: 'line',
              boxWidth: 20
            }
          },
          tooltip: { enabled: false }
        }
      }
    });
  }

  function updateChartLiveData() {
    if (!brewChart) return;
    
    const targetPoint = targetProfileData.find(p => p.x === totalElapsedSeconds) || targetProfileData[targetProfileData.length - 1];
    
    const existingIdx = actualProfileData.findIndex(p => p.x === totalElapsedSeconds);
    if (existingIdx >= 0) {
      actualProfileData[existingIdx] = { x: totalElapsedSeconds, y: targetPoint.y };
    } else {
      actualProfileData.push({ x: totalElapsedSeconds, y: targetPoint.y });
    }

    brewChart.update('none');
  }

  function startCountdown() {
    initAudio();
    document.getElementById('prepScreen').classList.add('hidden');
    document.getElementById('prepScreen').classList.remove('flex');
    document.getElementById('countdownScreen').classList.remove('hidden');
    document.getElementById('countdownScreen').classList.add('flex');

    remainingCountdown = 10;
    document.getElementById('countdownNumber').innerText = remainingCountdown;

    clearInterval(countdownInterval);
    countdownInterval = setInterval(() => {
      remainingCountdown--;
      document.getElementById('countdownNumber').innerText = remainingCountdown;
      
      if (remainingCountdown <= 3 && remainingCountdown > 0) {
        playChime();
      }

      if (remainingCountdown <= 0) {
        clearInterval(countdownInterval);
        playChime();
        triggerVibration();
        startActiveBrewTimer();
      }
    }, 1000);
  }

  function skipCountdown() {
    clearInterval(countdownInterval);
    playChime();
    startActiveBrewTimer();
  }

  function startActiveBrewTimer() {
    document.getElementById('countdownScreen').classList.add('hidden');
    document.getElementById('countdownScreen').classList.remove('flex');
    document.getElementById('brewScreen').classList.remove('hidden');
    document.getElementById('brewScreen').classList.add('flex');
    
    currentStepIdx = 0;
    totalElapsedSeconds = 0;
    document.getElementById('totalElapsedTimer').innerText = "00:00";

    generateTargetProfile();
    initChart();
    loadStep(0);
  }

  function loadStep(idx) {
    clearInterval(timerInterval);
    const steps = generateSteps(currentMethod, currentCups);
    
    if (idx >= steps.length) {
      finishBrew();
      return;
    }

    currentStepIdx = idx;
    const step = steps[idx];
    remainingStepTime = step.time;
    isPaused = false;
    document.getElementById('btnPause').innerText = "Pause";

    document.getElementById('stepTitle').innerText = step.title;
    document.getElementById('stepDesc').innerText = step.desc;
    document.getElementById('targetWater').innerText = step.water + "g";
    
    const nextStepTitle = document.getElementById('nextStepTitle');
    if (idx + 1 < steps.length) {
      const next = steps[idx + 1];
      nextStepTitle.innerText = `${next.title} (${next.water}g)`;
    } else {
      nextStepTitle.innerText = "Final Drawdown & Serve";
    }

    const valveBadge = document.getElementById('valveBadge');
    if (currentMethod === 'v60' || !step.valve) {
      valveBadge.classList.add('hidden');
    } else {
      valveBadge.classList.remove('hidden');
      if (step.valve === 'open') {
        valveBadge.innerText = "VALVE OPEN 🔓";
        valveBadge.className = "px-3 py-1 rounded-lg text-xs font-black tracking-widest uppercase transition-all duration-300 bg-switchOpen/20 text-emerald-400 border border-emerald-500/40";
      } else {
        valveBadge.innerText = "VALVE CLOSED 🔒";
        valveBadge.className = "px-3 py-1 rounded-lg text-xs font-black tracking-widest uppercase transition-all duration-300 bg-switchClosed/20 text-rose-400 border border-rose-500/40 pulse-subtle";
      }
    }

    updateUI();
    startTimer();
  }

  function startTimer() {
    clearInterval(timerInterval);
    timerInterval = setInterval(() => {
      if (!isPaused) {
        remainingStepTime--;
        totalElapsedSeconds++;
        
        document.getElementById('totalElapsedTimer').innerText = formatTime(totalElapsedSeconds);

        updateChartLiveData();
        updateUI();

        if (remainingStepTime <= 0) {
          clearInterval(timerInterval);
          playChime();
          triggerVibration();
          nextStep();
        }
      }
    }, 1000);
  }

  function updateUI() {
    const steps = generateSteps(currentMethod, currentCups);
    const step = steps[currentStepIdx];

    document.getElementById('timerSeconds').innerText = remainingStepTime + "s";

    const elapsedTimeInStep = step.time - remainingStepTime;
    const isPouring = step.pourTime > 0 && elapsedTimeInStep < step.pourTime;

    const badge = document.getElementById('phaseBadge');
    const instruction = document.getElementById('unifiedInstruction');
    const statusBubble = document.getElementById('unifiedStatusBubble');

    if (isPouring) {
      const pourLeft = step.pourTime - elapsedTimeInStep;
      badge.innerText = `ACTIVE POUR (${pourLeft}s)`;
      instruction.innerText = `Pour to ${step.water}g at ${step.flow}`;
      statusBubble.className = "w-full px-4 py-3 sm:py-4 rounded-2xl border bg-volvic/20 border-volvic text-center flex flex-col items-center justify-center gap-1 transition-all duration-300 animate-pulse";
      return;
    }

    if (step.phase === 'drawdown') {
      badge.innerText = step.restBadge || "DRAWDOWN";
      instruction.innerText = step.restInstruction || "Let the coffee drain.";
      statusBubble.className = "w-full px-4 py-3 sm:py-4 rounded-2xl border bg-gold/15 border-gold/40 text-center flex flex-col items-center justify-center gap-1 transition-all duration-300";
      return;
    }

    if (step.phase === 'steep') {
      const showCue = step.cueAt !== undefined && elapsedTimeInStep >= step.cueAt && elapsedTimeInStep < step.cueAt + (step.cueDuration || 10);
      badge.innerText = showCue ? "ACTION NOW" : (step.restBadge || "IMMERSION STEEP");
      instruction.innerText = showCue ? step.cueInstruction : (step.restInstruction || "Steep with the valve closed.");
      statusBubble.className = "w-full px-4 py-3 sm:py-4 rounded-2xl border bg-gold/15 border-gold/40 text-center flex flex-col items-center justify-center gap-1 transition-all duration-300";
      return;
    }

    badge.innerText = step.restBadge || (step.phase === 'bloom' ? "BLOOM REST" : "WAIT");
    instruction.innerText = step.restInstruction || "Wait for the next step.";
    statusBubble.className = "w-full px-4 py-3 sm:py-4 rounded-2xl border bg-bronze/15 border-bronze/40 text-center flex flex-col items-center justify-center gap-1 transition-all duration-300";
  }

  function togglePause() {
    isPaused = !isPaused;
    document.getElementById('btnPause').innerText = isPaused ? "Resume" : "Pause";
  }

  function nextStep() {
    loadStep(currentStepIdx + 1);
  }

  function cancelBrew() {
    clearInterval(timerInterval);
    clearInterval(countdownInterval);
    timerInterval = null;
    countdownInterval = null;
    releaseWakeLock();
    isPaused = false;
    remainingStepTime = 0;
    totalElapsedSeconds = 0;

    document.getElementById('brewScreen').classList.add('hidden');
    document.getElementById('brewScreen').classList.remove('flex');
    document.getElementById('countdownScreen').classList.add('hidden');
    document.getElementById('countdownScreen').classList.remove('flex');
    document.getElementById('prepScreen').classList.add('hidden');
    document.getElementById('prepScreen').classList.remove('flex');
    document.getElementById('setupScreen').classList.remove('hidden');
    document.getElementById('totalElapsedTimer').innerText = "00:00";
    document.getElementById('btnPause').innerText = "Pause";
  }

  function prevStep() {
    if (currentStepIdx > 0) {
      loadStep(currentStepIdx - 1);
    }
  }

  function finishBrew() {
    clearInterval(timerInterval);
    releaseWakeLock();
    document.getElementById('brewScreen').classList.add('hidden');
    document.getElementById('brewScreen').classList.remove('flex');
    document.getElementById('summaryScreen').classList.add('hidden');
    document.getElementById('summaryScreen').classList.remove('hidden');
    document.getElementById('summaryScreen').classList.add('flex');
    
    document.getElementById('summaryFinalTime').innerText = `Total Brew Time: ${formatTime(totalElapsedSeconds)}`;

    const key = document.getElementById('coffeeSelect').value;
    const data = coffeeData[key] || coffeeData['medium_classic'];
    document.getElementById('tastingNotes').innerText = data.notes;

    const diag = document.getElementById('diagnosticAdvice');
    if (currentMethod === 'v60') {
      diag.innerText = "If your brew tastes dry or astringent, your grind was slightly too fine. Coarsen your Fellow Ode Gen 2 by 1 click for your next brew.";
    } else if (currentMethod.includes('switch')) {
      diag.innerText = "If drawdown stalled during valve open phase, coarsen your Fellow Ode Gen 2 by 1 click to minimize fine migration.";
    } else {
      diag.innerText = "If cup feels muddy or overly heavy, coarsen your Fellow Ode Gen 2 setting slightly.";
    }
  }

  function resetApp() {
    document.getElementById('summaryScreen').classList.add('hidden');
    document.getElementById('summaryScreen').classList.remove('flex');
    document.getElementById('setupScreen').classList.remove('hidden');
  }

  // Initialize specs on load
  updateSetupSpecs();
</script>
</body>
</html>