<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<title>Expense Vault</title>
<link href="https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=DM+Sans:wght@300;400;500;600&display=swap" rel="stylesheet"/>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.0/css/all.min.css"/>
<style>
  :root {
    --bg: #0a0d14;
    --surface: #111520;
    --surface2: #161b2e;
    --border: rgba(255,255,255,0.07);
    --teal: #00d4aa;
    --teal-dim: rgba(0,212,170,0.12);
    --teal-glow: rgba(0,212,170,0.25);
    --purple: #7c5cfc;
    --purple-dim: rgba(124,92,252,0.12);
    --red: #ff4d6d;
    --red-dim: rgba(255,77,109,0.12);
    --amber: #ffb347;
    --amber-dim: rgba(255,179,71,0.12);
    --text: #e8eaf0;
    --text-muted: #6b7280;
    --text-dim: #9ca3af;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--bg);
    color:var(--text);
    font-family:'DM Sans',sans-serif;
    min-height:100vh;
    overflow-x:hidden;
  }
  /* Background */
  body::before{
    content:'';
    position:fixed;
    top:-200px;left:-200px;
    width:600px;height:600px;
    background:radial-gradient(circle,rgba(0,212,170,0.06) 0%,transparent 70%);
    pointer-events:none;z-index:0;
  }
  body::after{
    content:'';
    position:fixed;
    bottom:-200px;right:-200px;
    width:600px;height:600px;
    background:radial-gradient(circle,rgba(124,92,252,0.06) 0%,transparent 70%);
    pointer-events:none;z-index:0;
  }

  /* ── NAV ── */
  .navbar{
    position:sticky;top:0;z-index:100;
    background:rgba(10,13,20,0.85);
    backdrop-filter:blur(20px);
    border-bottom:1px solid var(--border);
    padding:0 24px;
  }
  .nav-inner{
    max-width:900px;margin:0 auto;
    display:flex;align-items:center;justify-content:space-between;
    height:64px;
  }
  .brand{
    display:flex;align-items:center;gap:10px;
    font-family:'Syne',sans-serif;font-weight:800;font-size:1.25rem;
    color:var(--text);text-decoration:none;
  }
  .brand-icon{
    width:36px;height:36px;border-radius:10px;
    background:linear-gradient(135deg,var(--teal),var(--purple));
    display:grid;place-items:center;font-size:1rem;color:#fff;
  }
  .brand span{color:var(--teal);}
  .nav-tabs{display:flex;gap:4px;background:var(--surface2);border-radius:12px;padding:4px;}
  .nav-tab{
    padding:8px 18px;border-radius:9px;border:none;
    background:transparent;color:var(--text-muted);
    font-family:'DM Sans',sans-serif;font-size:0.875rem;font-weight:500;
    cursor:pointer;transition:all .25s;display:flex;align-items:center;gap:7px;
  }
  .nav-tab.active{background:var(--teal);color:#000;font-weight:600;}
  .nav-tab:not(.active):hover{background:var(--border);color:var(--text);}

  /* ── LAYOUT ── */
  .container{max-width:900px;margin:0 auto;padding:28px 20px;position:relative;z-index:1;}

  /* ── PAGES ── */
  .page{display:none;animation:fadeUp .35s ease both;}
  .page.active{display:block;}
  @keyframes fadeUp{from{opacity:0;transform:translateY(18px);}to{opacity:1;transform:translateY(0);}}

  /* ── CARDS ── */
  .card{
    background:var(--surface);border:1px solid var(--border);
    border-radius:var(--radius);padding:24px;
    box-shadow:var(--shadow);
  }
  .card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
  .card-title{font-family:'Syne',sans-serif;font-weight:700;font-size:1.05rem;color:var(--text);}
  .card-sub{font-size:0.78rem;color:var(--text-muted);margin-top:3px;}

  /* ── STATS ROW ── */
  .stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:24px;}
  .stat-card{
    background:var(--surface);border:1px solid var(--border);
    border-radius:var(--radius);padding:18px;
    position:relative;overflow:hidden;
  }
  .stat-card::before{
    content:'';position:absolute;top:0;left:0;right:0;height:2px;
    background:var(--accent,var(--teal));
  }
  .stat-card.purple{--accent:var(--purple);}
  .stat-card.amber{--accent:var(--amber);}
  .stat-label{font-size:0.72rem;color:var(--text-muted);font-weight:500;letter-spacing:.05em;text-transform:uppercase;}
  .stat-value{font-family:'Syne',sans-serif;font-weight:800;font-size:1.6rem;margin-top:6px;color:var(--text);}
  .stat-icon{
    position:absolute;top:16px;right:16px;
    width:34px;height:34px;border-radius:9px;
    background:var(--teal-dim);display:grid;place-items:center;
    font-size:.85rem;color:var(--teal);
  }
  .stat-card.purple .stat-icon{background:var(--purple-dim);color:var(--purple);}
  .stat-card.amber .stat-icon{background:var(--amber-dim);color:var(--amber);}
  .stat-note{font-size:0.72rem;color:var(--text-muted);margin-top:4px;}

  /* ── FORM ── */
  .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  .form-group{display:flex;flex-direction:column;gap:7px;}
  .form-group.full{grid-column:1/-1;}
  label{font-size:0.78rem;font-weight:600;color:var(--text-dim);letter-spacing:.04em;text-transform:uppercase;}
  input,select,textarea{
    background:var(--surface2);border:1px solid var(--border);
    border-radius:var(--radius-sm);padding:11px 14px;
    color:var(--text);font-family:'DM Sans',sans-serif;font-size:0.9rem;
    outline:none;transition:border-color .2s,box-shadow .2s;width:100%;
  }
  input:focus,select:focus,textarea:focus{
    border-color:var(--teal);box-shadow:0 0 0 3px var(--teal-glow);
  }
  select option{background:var(--surface2);}
  .input-wrap{position:relative;}
  .input-prefix{
    position:absolute;left:12px;top:50%;transform:translateY(-50%);
    font-size:0.9rem;font-weight:600;color:var(--teal);pointer-events:none;
  }
  .input-wrap input{padding-left:28px;}

  .btn{
    padding:12px 22px;border-radius:var(--radius-sm);border:none;
    font-family:'DM Sans',sans-serif;font-size:.9rem;font-weight:600;
    cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:8px;
  }
  .btn-primary{
    background:linear-gradient(135deg,var(--teal) 0%,#00b4d8 100%);
    color:#000;width:100%;justify-content:center;margin-top:6px;
    box-shadow:0 4px 20px rgba(0,212,170,0.35);
  }
  .btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 28px rgba(0,212,170,0.45);}
  .btn-primary:active{transform:translateY(0);}

  /* ── CATEGORY CHIPS ── */
  .cat-chips{display:flex;flex-wrap:wrap;gap:7px;}
  .cat-chip{
    padding:6px 13px;border-radius:20px;border:1px solid var(--border);
    background:transparent;color:var(--text-muted);font-size:.78rem;font-weight:500;
    cursor:pointer;transition:all .2s;
  }
  .cat-chip.active,
  .cat-chip:hover{border-color:var(--teal);background:var(--teal-dim);color:var(--teal);}

  /* ── TODAY LIST ── */
  .expense-item{
    display:flex;align-items:center;gap:14px;
    padding:14px 0;border-bottom:1px solid var(--border);
    animation:fadeUp .25s ease both;
  }
  .expense-item:last-child{border-bottom:none;}
  .exp-icon{
    width:40px;height:40px;border-radius:11px;
    display:grid;place-items:center;font-size:.9rem;flex-shrink:0;
  }
  .exp-info{flex:1;}
  .exp-desc{font-weight:500;font-size:.9rem;color:var(--text);}
  .exp-meta{font-size:.75rem;color:var(--text-muted);margin-top:2px;}
  .exp-amount{
    font-family:'Syne',sans-serif;font-weight:700;font-size:1rem;color:var(--teal);
    white-space:nowrap;
  }
  .exp-actions{display:flex;gap:6px;margin-left:8px;}
  .icon-btn{
    width:32px;height:32px;border-radius:8px;border:1px solid var(--border);
    background:transparent;color:var(--text-muted);font-size:.8rem;
    cursor:pointer;transition:all .2s;display:grid;place-items:center;
  }
  .icon-btn.edit:hover{border-color:var(--purple);background:var(--purple-dim);color:var(--purple);}
  .icon-btn.del:hover{border-color:var(--red);background:var(--red-dim);color:var(--red);}
  .empty-state{
    text-align:center;padding:40px 0;color:var(--text-muted);
  }
  .empty-state i{font-size:2.5rem;margin-bottom:12px;opacity:.3;}
  .empty-state p{font-size:.875rem;}

  /* ── HISTORY PAGE ── */
  .history-controls{
    display:grid;grid-template-columns:1fr 1fr auto;gap:12px;
    margin-bottom:24px;align-items:end;
  }
  .history-summary{
    background:linear-gradient(135deg,var(--teal-dim),var(--purple-dim));
    border:1px solid rgba(0,212,170,0.2);
    border-radius:var(--radius);padding:18px 24px;
    display:flex;align-items:center;justify-content:space-between;
    margin-bottom:20px;
  }
  .hs-label{font-size:.78rem;color:var(--teal);font-weight:600;text-transform:uppercase;letter-spacing:.05em;}
  .hs-date{font-size:.85rem;color:var(--text-dim);margin-top:3px;}
  .hs-amount{font-family:'Syne',sans-serif;font-weight:800;font-size:1.8rem;color:var(--text);}
  .hs-count{font-size:.78rem;color:var(--text-muted);margin-top:3px;}

  .day-group{margin-bottom:20px;}
  .day-header{
    display:flex;align-items:center;justify-content:space-between;
    padding:8px 14px;background:var(--surface2);
    border-radius:var(--radius-sm);margin-bottom:10px;border:1px solid var(--border);
  }
  .day-label{font-family:'Syne',sans-serif;font-weight:700;font-size:.85rem;color:var(--text);}
  .day-badge{
    font-size:.75rem;font-weight:600;padding:3px 10px;
    border-radius:20px;background:var(--teal-dim);color:var(--teal);
    font-family:'Syne',sans-serif;
  }
  .history-item{
    display:flex;align-items:center;gap:14px;
    padding:12px 14px;border-radius:var(--radius-sm);
    background:var(--surface);border:1px solid var(--border);
    margin-bottom:8px;transition:border-color .2s;
  }
  .history-item:hover{border-color:rgba(0,212,170,0.2);}

  /* ── EDIT MODAL ── */
  .modal-overlay{
    position:fixed;inset:0;background:rgba(0,0,0,0.7);backdrop-filter:blur(6px);
    z-index:1000;display:flex;align-items:center;justify-content:center;
    opacity:0;pointer-events:none;transition:opacity .25s;
  }
  .modal-overlay.open{opacity:1;pointer-events:all;}
  .modal{
    background:var(--surface);border:1px solid var(--border);
    border-radius:var(--radius);padding:28px;width:90%;max-width:460px;
    box-shadow:0 24px 60px rgba(0,0,0,0.6);
    transform:translateY(20px);transition:transform .25s;
  }
  .modal-overlay.open .modal{transform:translateY(0);}
  .modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
  .modal-title{font-family:'Syne',sans-serif;font-weight:700;font-size:1.1rem;}
  .modal-close{
    width:34px;height:34px;border-radius:9px;border:1px solid var(--border);
    background:transparent;color:var(--text-muted);cursor:pointer;
    font-size:.9rem;display:grid;place-items:center;transition:all .2s;
  }
  .modal-close:hover{border-color:var(--red);color:var(--red);background:var(--red-dim);}
  .modal-actions{display:flex;gap:10px;margin-top:20px;}
  .btn-ghost{
    flex:1;padding:11px;border-radius:var(--radius-sm);border:1px solid var(--border);
    background:transparent;color:var(--text-muted);font-family:'DM Sans',sans-serif;
    font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s;
  }
  .btn-ghost:hover{border-color:var(--text-muted);color:var(--text);}
  .btn-save{
    flex:2;padding:11px;border-radius:var(--radius-sm);border:none;
    background:linear-gradient(135deg,var(--teal),#00b4d8);
    color:#000;font-family:'DM Sans',sans-serif;font-size:.875rem;font-weight:700;
    cursor:pointer;transition:all .2s;
  }
  .btn-save:hover{transform:translateY(-1px);box-shadow:0 4px 16px var(--teal-glow);}

  /* ── TOAST ── */
  .toast-wrap{position:fixed;bottom:24px;right:24px;z-index:2000;display:flex;flex-direction:column;gap:8px;}
  .toast{
    padding:12px 18px;border-radius:var(--radius-sm);
    font-size:.85rem;font-weight:500;color:#000;
    animation:toastIn .3s ease both;min-width:220px;
    display:flex;align-items:center;gap:9px;
    box-shadow:0 8px 24px rgba(0,0,0,0.4);
  }
  .toast.success{background:var(--teal);}
  .toast.error{background:var(--red);color:#fff;}
  .toast.info{background:var(--purple);color:#fff;}
  @keyframes toastIn{from{opacity:0;transform:translateX(30px);}to{opacity:1;transform:translateX(0);}}
  @keyframes toastOut{from{opacity:1;transform:translateX(0);}to{opacity:0;transform:translateX(30px);}}

  /* ── CAT COLORS ── */
  .cat-food{background:rgba(255,179,71,.15);color:#ffb347;}
  .cat-fuel{background:rgba(0,212,170,.15);color:#00d4aa;}
  .cat-bills{background:rgba(124,92,252,.15);color:#7c5cfc;}
  .cat-grocery{background:rgba(52,211,153,.15);color:#34d399;}
  .cat-health{background:rgba(248,113,113,.15);color:#f87171;}
  .cat-shopping{background:rgba(251,191,36,.15);color:#fbbf24;}
  .cat-education{background:rgba(56,189,248,.15);color:#38bdf8;}
  .cat-other{background:rgba(156,163,175,.15);color:#9ca3af;}

  /* ── RESPONSIVE ── */
  @media(max-width:640px){
    .stats-row{grid-template-columns:1fr 1fr;}
    .stats-row .stat-card:last-child{grid-column:1/-1;}
    .form-grid{grid-template-columns:1fr;}
    .history-controls{grid-template-columns:1fr 1fr;grid-template-rows:auto auto;}
    .history-controls .btn{grid-column:1/-1;}
    .nav-tab span{display:none;}
    .nav-tab{padding:8px 14px;}
    .history-summary{flex-direction:column;align-items:flex-start;gap:10px;}
  }
  @media(max-width:400px){
    .stats-row{grid-template-columns:1fr;}
  }

  /* scrollbar */
  ::-webkit-scrollbar{width:6px;}
  ::-webkit-scrollbar-track{background:transparent;}
  ::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px;}
</style>
</head>
<body>

<!-- NAVBAR -->
<nav class="navbar">
  <div class="nav-inner">
    <a class="brand" href="#">
      <div class="brand-icon"><i class="fa-solid fa-wallet"></i></div>
      Expense<span>Vault</span>
    </a>
    <div class="nav-tabs">
      <button class="nav-tab active" data-page="dashboard" onclick="switchPage('dashboard')">
        <i class="fa-solid fa-house-chimney"></i><span>Dashboard</span>
      </button>
      <button class="nav-tab" data-page="history" onclick="switchPage('history')">
        <i class="fa-solid fa-clock-rotate-left"></i><span>History</span>
      </button>
    </div>
  </div>
</nav>

<!-- TOAST CONTAINER -->
<div class="toast-wrap" id="toastWrap"></div>

<!-- EDIT MODAL -->
<div class="modal-overlay" id="editModal">
  <div class="modal">
    <div class="modal-header">
      <div class="modal-title"><i class="fa-solid fa-pen-to-square" style="color:var(--purple);margin-right:8px;"></i>Edit Expense</div>
      <button class="modal-close" onclick="closeModal()"><i class="fa-solid fa-xmark"></i></button>
    </div>
    <div class="form-grid">
      <div class="form-group full">
        <label>Description</label>
        <input type="text" id="editDesc" placeholder="What did you spend on?"/>
      </div>
      <div class="form-group">
        <label>Amount (Rs)</label>
        <div class="input-wrap">
          <span class="input-prefix">₨</span>
          <input type="number" id="editAmount" placeholder="0"/>
        </div>
      </div>
      <div class="form-group">
        <label>Category</label>
        <select id="editCategory">
          <option value="food">🍔 Food</option>
          <option value="fuel">⛽ Fuel / Gas</option>
          <option value="bills">💡 Bills</option>
          <option value="grocery">🛒 Grocery</option>
          <option value="health">💊 Health</option>
          <option value="shopping">🛍️ Shopping</option>
          <option value="education">📚 Education</option>
          <option value="other">📦 Other</option>
        </select>
      </div>
      <div class="form-group">
        <label>Date</label>
        <input type="date" id="editDate"/>
      </div>
      <div class="form-group">
        <label>Time</label>
        <input type="time" id="editTime"/>
      </div>
    </div>
    <div class="modal-actions">
      <button class="btn-ghost" onclick="closeModal()">Cancel</button>
      <button class="btn-save" onclick="saveEdit()"><i class="fa-solid fa-check"></i> Save Changes</button>
    </div>
  </div>
</div>

<!-- MAIN CONTENT -->
<div class="container">

  <!-- ═══════════ DASHBOARD PAGE ═══════════ -->
  <div class="page active" id="page-dashboard">

    <!-- Stats -->
    <div class="stats-row">
      <div class="stat-card">
        <div class="stat-icon"><i class="fa-solid fa-sun"></i></div>
        <div class="stat-label">Today</div>
        <div class="stat-value" id="statToday">₨0</div>
        <div class="stat-note" id="statTodayCount">0 transactions</div>
      </div>
      <div class="stat-card purple">
        <div class="stat-icon"><i class="fa-solid fa-calendar"></i></div>
        <div class="stat-label">This Month</div>
        <div class="stat-value" id="statMonth">₨0</div>
        <div class="stat-note" id="statMonthCount">0 days tracked</div>
      </div>
      <div class="stat-card amber">
        <div class="stat-icon"><i class="fa-solid fa-chart-line"></i></div>
        <div class="stat-label">All Time</div>
        <div class="stat-value" id="statAll">₨0</div>
        <div class="stat-note" id="statAllCount">0 total entries</div>
      </div>
    </div>

    <!-- Add Expense Form -->
    <div class="card" style="margin-bottom:24px;">
      <div class="card-header">
        <div>
          <div class="card-title"><i class="fa-solid fa-plus-circle" style="color:var(--teal);margin-right:8px;"></i>Add Expense</div>
          <div class="card-sub">Record what you spent today</div>
        </div>
      </div>
      <div class="form-grid">
        <div class="form-group full">
          <label>Description</label>
          <input type="text" id="desc" placeholder="e.g. Milk, Petrol, Electricity Bill..." maxlength="80"/>
        </div>
        <div class="form-group">
          <label>Amount (Rs)</label>
          <div class="input-wrap">
            <span class="input-prefix">₨</span>
            <input type="number" id="amount" placeholder="0" min="0"/>
          </div>
        </div>
        <div class="form-group">
          <label>Category</label>
          <select id="category">
            <option value="food">🍔 Food</option>
            <option value="fuel">⛽ Fuel / Gas</option>
            <option value="bills">💡 Bills</option>
            <option value="grocery">🛒 Grocery</option>
            <option value="health">💊 Health</option>
            <option value="shopping">🛍️ Shopping</option>
            <option value="education">📚 Education</option>
            <option value="other">📦 Other</option>
          </select>
        </div>
        <div class="form-group">
          <label>Date</label>
          <input type="date" id="expDate"/>
        </div>
        <div class="form-group">
          <label>Time</label>
          <input type="time" id="expTime"/>
        </div>
      </div>
      <button class="btn btn-primary" onclick="addExpense()">
        <i class="fa-solid fa-plus"></i> Add Expense
      </button>
    </div>

    <!-- Today's Expenses -->
    <div class="card">
      <div class="card-header">
        <div>
          <div class="card-title"><i class="fa-solid fa-receipt" style="color:var(--amber);margin-right:8px;"></i>Today's Expenses</div>
          <div class="card-sub" id="todayDateLabel"></div>
        </div>
        <div style="font-family:'Syne',sans-serif;font-weight:800;font-size:1.1rem;color:var(--teal);" id="todayTotalBadge">₨0</div>
      </div>
      <div id="todayList">
        <div class="empty-state">
          <i class="fa-solid fa-mug-hot"></i>
          <p>No expenses yet today.<br/>Add your first one above!</p>
        </div>
      </div>
    </div>
  </div>

  <!-- ═══════════ HISTORY PAGE ═══════════ -->
  <div class="page" id="page-history">

    <!-- Filter Controls -->
    <div class="card" style="margin-bottom:20px;">
      <div class="card-header" style="margin-bottom:14px;">
        <div class="card-title"><i class="fa-solid fa-filter" style="color:var(--purple);margin-right:8px;"></i>Filter History</div>
      </div>
      <div class="history-controls">
        <div class="form-group">
          <label>Select Date</label>
          <input type="date" id="filterDate" onchange="renderHistory()"/>
        </div>
        <div class="form-group">
          <label>Category</label>
          <select id="filterCat" onchange="renderHistory()">
            <option value="all">All Categories</option>
            <option value="food">🍔 Food</option>
            <option value="fuel">⛽ Fuel / Gas</option>
            <option value="bills">💡 Bills</option>
            <option value="grocery">🛒 Grocery</option>
            <option value="health">💊 Health</option>
            <option value="shopping">🛍️ Shopping</option>
            <option value="education">📚 Education</option>
            <option value="other">📦 Other</option>
          </select>
        </div>
        <button class="btn btn-primary" style="margin-top:0;" onclick="clearFilters()">
          <i class="fa-solid fa-rotate-left"></i> Reset
        </button>
      </div>
    </div>

    <!-- Summary Banner -->
    <div class="history-summary" id="historySummary">
      <div>
        <div class="hs-label"><i class="fa-solid fa-calendar-check" style="margin-right:6px;"></i>Selected Period</div>
        <div class="hs-date" id="hsSummaryDate">All time</div>
      </div>
      <div style="text-align:right;">
        <div class="hs-amount" id="hsSummaryTotal">₨0</div>
        <div class="hs-count" id="hsSummaryCount">0 transactions</div>
      </div>
    </div>

    <!-- History List -->
    <div id="historyList"></div>
  </div>

</div>

<script>
// ══════════════════════════════════════════
//  DATA LAYER
// ══════════════════════════════════════════
const STORAGE_KEY = 'expvault_v2';
let expenses = JSON.parse(localStorage.getItem(STORAGE_KEY) || '[]');
let editingId = null;

function save() {
  localStorage.setItem(STORAGE_KEY, JSON.stringify(expenses));
}

function uid() {
  return Date.now().toString(36) + Math.random().toString(36).slice(2);
}

// ══════════════════════════════════════════
//  CAT CONFIG
// ══════════════════════════════════════════
const CAT = {
  food:      { icon:'🍔', label:'Food' },
  fuel:      { icon:'⛽', label:'Fuel / Gas' },
  bills:     { icon:'💡', label:'Bills' },
  grocery:   { icon:'🛒', label:'Grocery' },
  health:    { icon:'💊', label:'Health' },
  shopping:  { icon:'🛍️', label:'Shopping' },
  education: { icon:'📚', label:'Education' },
  other:     { icon:'📦', label:'Other' },
};

// ══════════════════════════════════════════
//  NAV
// ══════════════════════════════════════════
function switchPage(page) {
  document.querySelectorAll('.page').forEach(p => p.classList.remove('active'));
  document.querySelectorAll('.nav-tab').forEach(t => t.classList.remove('active'));
  document.getElementById('page-' + page).classList.add('active');
  document.querySelector(`[data-page="${page}"]`).classList.add('active');
  if (page === 'history') renderHistory();
  if (page === 'dashboard') renderDashboard();
}

// ══════════════════════════════════════════
//  ADD EXPENSE
// ══════════════════════════════════════════
function addExpense() {
  const desc   = document.getElementById('desc').value.trim();
  const amount = parseFloat(document.getElementById('amount').value);
  const cat    = document.getElementById('category').value;
  const date   = document.getElementById('expDate').value;
  const time   = document.getElementById('expTime').value;

  if (!desc)          { toast('Please enter a description', 'error'); return; }
  if (!amount || amount <= 0) { toast('Enter a valid amount', 'error'); return; }
  if (!date)          { toast('Select a date', 'error'); return; }
  if (!time)          { toast('Select a time', 'error'); return; }

  const entry = { id: uid(), desc, amount, cat, date, time };
  expenses.push(entry);
  save();
  toast(`₨${amount.toLocaleString()} added — ${desc}`, 'success');

  document.getElementById('desc').value   = '';
  document.getElementById('amount').value = '';
  setDefaultDateTime();
  renderDashboard();
}

// ══════════════════════════════════════════
//  DELETE
// ══════════════════════════════════════════
function deleteExpense(id) {
  if (!confirm('Delete this expense?')) return;
  expenses = expenses.filter(e => e.id !== id);
  save();
  toast('Expense deleted', 'error');
  renderDashboard();
  if (document.getElementById('page-history').classList.contains('active')) renderHistory();
}

// ══════════════════════════════════════════
//  EDIT MODAL
// ══════════════════════════════════════════
function openEdit(id) {
  const e = expenses.find(x => x.id === id);
  if (!e) return;
  editingId = id;
  document.getElementById('editDesc').value     = e.desc;
  document.getElementById('editAmount').value   = e.amount;
  document.getElementById('editCategory').value = e.cat;
  document.getElementById('editDate').value     = e.date;
  document.getElementById('editTime').value     = e.time;
  document.getElementById('editModal').classList.add('open');
}

function closeModal() {
  document.getElementById('editModal').classList.remove('open');
  editingId = null;
}

function saveEdit() {
  const desc   = document.getElementById('editDesc').value.trim();
  const amount = parseFloat(document.getElementById('editAmount').value);
  const cat    = document.getElementById('editCategory').value;
  const date   = document.getElementById('editDate').value;
  const time   = document.getElementById('editTime').value;

  if (!desc || !amount || amount <= 0 || !date || !time) {
    toast('Please fill all fields correctly', 'error'); return;
  }

  const idx = expenses.findIndex(e => e.id === editingId);
  if (idx !== -1) {
    expenses[idx] = { ...expenses[idx], desc, amount, cat, date, time };
    save();
    toast('Expense updated!', 'info');
  }
  closeModal();
  renderDashboard();
  if (document.getElementById('page-history').classList.contains('active')) renderHistory();
}

// Close on overlay click
document.getElementById('editModal').addEventListener('click', function(e) {
  if (e.target === this) closeModal();
});

// ══════════════════════════════════════════
//  RENDER DASHBOARD
// ══════════════════════════════════════════
function renderDashboard() {
  const today = todayStr();

  // Stats
  const todayExp  = expenses.filter(e => e.date === today);
  const todaySum  = todayExp.reduce((a, e) => a + e.amount, 0);
  const monthKey  = today.slice(0, 7);
  const monthExp  = expenses.filter(e => e.date.startsWith(monthKey));
  const monthSum  = monthExp.reduce((a, e) => a + e.amount, 0);
  const monthDays = new Set(monthExp.map(e => e.date)).size;
  const allSum    = expenses.reduce((a, e) => a + e.amount, 0);

  document.getElementById('statToday').textContent      = '₨' + todaySum.toLocaleString();
  document.getElementById('statTodayCount').textContent = todayExp.length + ' transactions';
  document.getElementById('statMonth').textContent      = '₨' + monthSum.toLocaleString();
  document.getElementById('statMonthCount').textContent = monthDays + ' days tracked';
  document.getElementById('statAll').textContent        = '₨' + allSum.toLocaleString();
  document.getElementById('statAllCount').textContent   = expenses.length + ' total entries';

  // Today label
  const now = new Date();
  document.getElementById('todayDateLabel').textContent =
    now.toLocaleDateString('en-PK', { weekday:'long', year:'numeric', month:'long', day:'numeric' });
  document.getElementById('todayTotalBadge').textContent = '₨' + todaySum.toLocaleString();

  // Today list
  const list = document.getElementById('todayList');
  if (todayExp.length === 0) {
    list.innerHTML = `<div class="empty-state">
      <i class="fa-solid fa-mug-hot"></i>
      <p>No expenses yet today.<br/>Add your first one above!</p>
    </div>`;
    return;
  }

  const sorted = [...todayExp].sort((a, b) => b.time.localeCompare(a.time));
  list.innerHTML = sorted.map(e => expenseItemHTML(e)).join('');
}

// ══════════════════════════════════════════
//  RENDER HISTORY
// ══════════════════════════════════════════
function renderHistory() {
  const filterDate = document.getElementById('filterDate').value;
  const filterCat  = document.getElementById('filterCat').value;

  let filtered = [...expenses];
  if (filterDate) filtered = filtered.filter(e => e.date === filterDate);
  if (filterCat !== 'all') filtered = filtered.filter(e => e.cat === filterCat);

  // Summary
  const total = filtered.reduce((a, e) => a + e.amount, 0);
  document.getElementById('hsSummaryTotal').textContent = '₨' + total.toLocaleString();
  document.getElementById('hsSummaryCount').textContent = filtered.length + ' transactions';
  if (filterDate) {
    const d = new Date(filterDate + 'T00:00:00');
    document.getElementById('hsSummaryDate').textContent =
      d.toLocaleDateString('en-PK', { weekday:'long', year:'numeric', month:'long', day:'numeric' });
  } else {
    document.getElementById('hsSummaryDate').textContent =
      filterCat !== 'all' ? (CAT[filterCat]?.label || 'All') + ' — All Time' : 'All time';
  }

  const container = document.getElementById('historyList');
  if (filtered.length === 0) {
    container.innerHTML = `<div class="empty-state" style="padding:60px 0;">
      <i class="fa-solid fa-magnifying-glass"></i>
      <p>No expenses found for the selected filter.</p>
    </div>`;
    return;
  }

  // Group by date
  const groups = {};
  filtered.forEach(e => {
    if (!groups[e.date]) groups[e.date] = [];
    groups[e.date].push(e);
  });

  // Sort dates desc
  const sortedDates = Object.keys(groups).sort((a, b) => b.localeCompare(a));

  container.innerHTML = sortedDates.map(date => {
    const items = groups[date].sort((a, b) => b.time.localeCompare(a.time));
    const dayTotal = items.reduce((a, e) => a + e.amount, 0);
    const d = new Date(date + 'T00:00:00');
    const dateLabel = isToday(date) ? 'Today' :
      isYesterday(date) ? 'Yesterday' :
      d.toLocaleDateString('en-PK', { weekday:'short', day:'numeric', month:'short', year:'numeric' });

    return `<div class="day-group">
      <div class="day-header">
        <span class="day-label">${dateLabel}</span>
        <span class="day-badge">₨${dayTotal.toLocaleString()}</span>
      </div>
      ${items.map(e => historyItemHTML(e)).join('')}
    </div>`;
  }).join('');
}

function clearFilters() {
  document.getElementById('filterDate').value = '';
  document.getElementById('filterCat').value  = 'all';
  renderHistory();
}

// ══════════════════════════════════════════
//  HTML TEMPLATES
// ══════════════════════════════════════════
function expenseItemHTML(e) {
  const c = CAT[e.cat] || CAT.other;
  return `<div class="expense-item">
    <div class="exp-icon cat-${e.cat}">${c.icon}</div>
    <div class="exp-info">
      <div class="exp-desc">${escHtml(e.desc)}</div>
      <div class="exp-meta">${c.label} • ${e.time}</div>
    </div>
    <div class="exp-amount">₨${parseFloat(e.amount).toLocaleString()}</div>
    <div class="exp-actions">
      <button class="icon-btn edit" title="Edit" onclick="openEdit('${e.id}')"><i class="fa-solid fa-pen"></i></button>
      <button class="icon-btn del" title="Delete" onclick="deleteExpense('${e.id}')"><i class="fa-solid fa-trash"></i></button>
    </div>
  </div>`;
}

function historyItemHTML(e) {
  const c = CAT[e.cat] || CAT.other;
  return `<div class="history-item">
    <div class="exp-icon cat-${e.cat}">${c.icon}</div>
    <div class="exp-info">
      <div class="exp-desc">${escHtml(e.desc)}</div>
      <div class="exp-meta">${c.label} • ${e.time}</div>
    </div>
    <div class="exp-amount" style="margin-left:auto;">₨${parseFloat(e.amount).toLocaleString()}</div>
    <div class="exp-actions">
      <button class="icon-btn edit" title="Edit" onclick="openEdit('${e.id}')"><i class="fa-solid fa-pen"></i></button>
      <button class="icon-btn del" title="Delete" onclick="deleteExpense('${e.id}')"><i class="fa-solid fa-trash"></i></button>
    </div>
  </div>`;
}

// ══════════════════════════════════════════
//  TOAST
// ══════════════════════════════════════════
function toast(msg, type = 'success') {
  const wrap = document.getElementById('toastWrap');
  const el = document.createElement('div');
  el.className = `toast ${type}`;
  const icons = { success:'fa-check-circle', error:'fa-circle-xmark', info:'fa-circle-info' };
  el.innerHTML = `<i class="fa-solid ${icons[type]||icons.success}"></i>${msg}`;
  wrap.appendChild(el);
  setTimeout(() => {
    el.style.animation = 'toastOut .3s ease both';
    setTimeout(() => el.remove(), 300);
  }, 3000);
}

// ══════════════════════════════════════════
//  HELPERS
// ══════════════════════════════════════════
function todayStr() {
  return new Date().toISOString().slice(0, 10);
}
function isToday(d) { return d === todayStr(); }
function isYesterday(d) {
  const y = new Date(); y.setDate(y.getDate() - 1);
  return d === y.toISOString().slice(0, 10);
}
function escHtml(s) {
  return s.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
}
function setDefaultDateTime() {
  const now = new Date();
  document.getElementById('expDate').value = now.toISOString().slice(0, 10);
  document.getElementById('expTime').value = now.toTimeString().slice(0, 5);
}

// ══════════════════════════════════════════
//  INIT
// ══════════════════════════════════════════
setDefaultDateTime();
renderDashboard();
</script>
</body>
</html>
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