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Separate logic into its own file for readability

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arch Lars
2026-06-06 18:39:16 +08:00
parent 604af9bdbc
commit 6ff6c7b515
3 changed files with 409 additions and 410 deletions
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forex-dashboard.html → app.js
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<!DOCTYPE html>
<html lang="en" data-theme="dark">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>FX Pulse — Foreign Exchange Dashboard</title>
<!-- ===== Chart libraries (CDN, charts only) ===== -->
<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.3/dist/chart.umd.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/luxon@3.4.4/build/global/luxon.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-adapter-luxon@1.3.1/dist/chartjs-adapter-luxon.umd.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-chart-financial@0.2.1/dist/chartjs-chart-financial.min.js"></script>
<style>
/* =========================================================================
THEME TOKENS — cool palette only (navy, deep blue, cyan, teal, slate,
ice blue, soft mint). No purple anywhere.
========================================================================= */
:root{
--c-cyan:#22d3ee; --c-teal:#2dd4bf; --c-blue:#3b82f6;
--c-mint:#6ee7b7; --c-sky:#38bdf8; --c-slate:#64748b;
--c-up:#2dd4bf; --c-down:#5b8bbf; /* cool up/down for candles */
--radius:18px;
--transition:.25s cubic-bezier(.4,0,.2,1);
--font:"Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
}
/* ---------- Dark theme (default) : professional, finance-focused -------- */
html[data-theme="dark"]{
--bg-0:#070d1a; --bg-1:#0b1428; --bg-grad:radial-gradient(1200px 600px at 80% -10%,#0f2748 0,transparent 60%),radial-gradient(900px 500px at -10% 110%,#062a33 0,transparent 55%);
--card:rgba(17,29,53,.62);
--card-solid:#111d35;
--border:rgba(120,170,225,.14);
--text:#e8f1ff; --text-dim:#9fb3d1; --text-faint:#6c84a6;
--accent:var(--c-cyan); --accent-2:var(--c-teal);
--shadow:0 18px 45px -20px rgba(0,0,0,.75);
--pos:#34d399; --neg:#5b8bbf; --grid:rgba(120,170,225,.10);
--input:rgba(8,16,32,.7);
}
/* ---------- Light theme : clean & airy ---------------------------------- */
html[data-theme="light"]{
--bg-0:#eef4fb; --bg-1:#f6fafe; --bg-grad:radial-gradient(1100px 600px at 85% -10%,#dceefb 0,transparent 60%),radial-gradient(900px 500px at -10% 110%,#d9f7f0 0,transparent 55%);
--card:rgba(255,255,255,.72);
--card-solid:#ffffff;
--border:rgba(40,90,140,.14);
--text:#0c2440; --text-dim:#3f5b7f; --text-faint:#73879f;
--accent:#0e9bb8; --accent-2:#0d9488;
--shadow:0 16px 38px -22px rgba(20,60,110,.40);
--pos:#0d9488; --neg:#4f7eb0; --grid:rgba(40,90,140,.10);
--input:rgba(255,255,255,.85);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
font-family:var(--font);
color:var(--text);
background:var(--bg-0);
background-image:var(--bg-grad);
background-attachment:fixed;
min-height:100vh;
line-height:1.45;
transition:background var(--transition),color var(--transition);
-webkit-font-smoothing:antialiased;
}
/* ===== Layout shell ===== */
.wrap{max-width:1320px;margin:0 auto;padding:22px clamp(14px,3vw,34px) 60px}
/* ===== Glass card ===== */
.card{
background:var(--card);
border:1px solid var(--border);
border-radius:var(--radius);
box-shadow:var(--shadow);
backdrop-filter:blur(14px) saturate(140%);
-webkit-backdrop-filter:blur(14px) saturate(140%);
padding:20px;
transition:transform var(--transition),box-shadow var(--transition),border var(--transition);
}
.card:hover{transform:translateY(-3px);box-shadow:0 24px 55px -22px rgba(0,0,0,.6)}
.card h2,.card h3{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--text-dim);font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
/* ===== Header ===== */
header.topbar{
display:flex;flex-wrap:wrap;align-items:center;gap:14px;
margin-bottom:22px;
}
.brand{display:flex;align-items:center;gap:12px;margin-right:auto}
.logo{
width:44px;height:44px;border-radius:13px;flex:none;
background:linear-gradient(135deg,var(--c-cyan),var(--c-teal));
display:grid;place-items:center;color:#04222b;font-weight:900;font-size:1.2rem;
box-shadow:0 8px 22px -6px var(--c-cyan);
}
.brand h1{font-size:1.25rem;letter-spacing:.3px}
.brand small{display:block;color:var(--text-faint);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase}
.controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.field{display:flex;flex-direction:column;gap:3px}
.field label{font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text-faint);padding-left:4px}
select,input,button{font-family:inherit;color:var(--text)}
select,input{
background:var(--input);border:1px solid var(--border);border-radius:11px;
padding:9px 12px;font-size:.9rem;min-width:120px;outline:none;transition:border var(--transition),box-shadow var(--transition);
}
select:focus,input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 25%,transparent)}
.btn{
cursor:pointer;border:1px solid var(--border);border-radius:11px;
background:var(--input);padding:9px 14px;font-size:.85rem;font-weight:600;
display:inline-flex;align-items:center;gap:7px;transition:all var(--transition);
}
.btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--c-cyan),var(--c-teal));color:#03222b;border:none}
.btn.primary:hover{filter:brightness(1.08);color:#03222b}
.btn.icon{padding:9px 11px}
#refreshBtn.spin svg{animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.updated{font-size:.72rem;color:var(--text-faint);display:flex;align-items:center;gap:6px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--pos);box-shadow:0 0 8px var(--pos)}
/* ===== Grid ===== */
.grid{display:grid;gap:18px}
.top-grid{grid-template-columns:minmax(0,1.25fr) minmax(0,1.15fr) minmax(0,.9fr);margin-bottom:18px;align-items:start}
.chart-grid{grid-template-columns:1fr 1fr;margin-bottom:18px}
.bottom-grid{grid-template-columns:1.4fr 1fr;margin-bottom:18px}
@media(max-width:1040px){.top-grid,.chart-grid,.bottom-grid{grid-template-columns:1fr}}
/* ===== Current value card ===== */
.pair-row{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.pair-row .pair{font-size:1rem;color:var(--text-dim);font-weight:600}
.rate{font-size:clamp(2.2rem,5vw,3rem);font-weight:800;letter-spacing:-1px;line-height:1.1;
background:linear-gradient(120deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{margin-top:6px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:var(--text-dim);font-size:.9rem}
.change{font-weight:700}
.change.up{color:var(--pos)} .change.down{color:var(--neg)}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:.72rem;font-weight:700;
padding:5px 11px;border-radius:999px;letter-spacing:.04em;border:1px solid transparent}
.badge.up{background:color-mix(in srgb,var(--pos) 16%,transparent);color:var(--pos);border-color:color-mix(in srgb,var(--pos) 35%,transparent)}
.badge.down{background:color-mix(in srgb,var(--neg) 16%,transparent);color:var(--neg);border-color:color-mix(in srgb,var(--neg) 35%,transparent)}
.badge.flat{background:color-mix(in srgb,var(--c-slate) 20%,transparent);color:var(--text-dim);border-color:color-mix(in srgb,var(--c-slate) 35%,transparent)}
.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
.mini{background:var(--input);border:1px solid var(--border);border-radius:12px;padding:10px}
.mini .k{font-size:.62rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-faint)}
.mini .v{font-size:1rem;font-weight:700;margin-top:3px}
/* ===== AI / pattern lists ===== */
.insight{display:flex;gap:11px;padding:11px 0;border-bottom:1px dashed var(--border)}
.insight:last-child{border-bottom:none}
.insight .ic{flex:none;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;font-size:.95rem;
background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent)}
.insight p{font-size:.86rem;color:var(--text);line-height:1.4}
.insight p span{color:var(--text-faint);display:block;font-size:.74rem;margin-top:2px}
.pattern{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px dashed var(--border)}
.pattern:last-child{border-bottom:none}
.tag{font-size:.66rem;font-weight:800;letter-spacing:.05em;padding:4px 9px;border-radius:8px;flex:none;text-transform:uppercase}
.tag.t-up{background:color-mix(in srgb,var(--c-teal) 20%,transparent);color:var(--c-teal)}
.tag.t-down{background:color-mix(in srgb,var(--c-down) 22%,transparent);color:var(--neg)}
.tag.t-flat{background:color-mix(in srgb,var(--c-slate) 22%,transparent);color:var(--text-dim)}
.tag.t-vol{background:color-mix(in srgb,var(--c-sky) 22%,transparent);color:var(--c-sky)}
.tag.t-break{background:color-mix(in srgb,var(--c-cyan) 22%,transparent);color:var(--c-cyan)}
.pattern small{color:var(--text-dim);font-size:.8rem}
/* ===== Charts ===== */
.chart-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.chart-box{position:relative;height:320px}
.range-btns{display:flex;gap:6px;background:var(--input);padding:4px;border-radius:11px;border:1px solid var(--border)}
.range-btns button{border:none;background:transparent;color:var(--text-dim);font-size:.78rem;font-weight:600;
padding:5px 11px;border-radius:8px;cursor:pointer;transition:all var(--transition)}
.range-btns button.active{background:linear-gradient(135deg,var(--c-cyan),var(--c-teal));color:#04222b}
.est-note{font-size:.7rem;color:var(--text-faint);font-style:italic;margin-top:8px}
/* ===== Heatmap ===== */
.heat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px}
.heat-cell{border-radius:13px;padding:14px 12px;color:#eafcff;position:relative;overflow:hidden;
border:1px solid rgba(255,255,255,.08);transition:transform var(--transition)}
.heat-cell:hover{transform:scale(1.04)}
.heat-cell .code{font-weight:800;font-size:1.05rem;letter-spacing:.04em}
.heat-cell .pct{font-size:.78rem;opacity:.92;font-weight:600;margin-top:3px}
.heat-cell .lbl{font-size:.62rem;opacity:.8;text-transform:uppercase;letter-spacing:.08em;margin-top:6px}
.heat-legend{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:.72rem;color:var(--text-faint)}
.heat-bar{flex:1;height:9px;border-radius:6px;background:linear-gradient(90deg,#0b2233,#0e4a5a,#138a8a,#1fb6a6,#7ff0c8)}
/* ===== Calculator ===== */
.calc-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:9px;align-items:end}
@media(max-width:540px){.calc-grid{grid-template-columns:1fr}}
.calc-grid select,.calc-grid input{min-width:0}
.calc-swap{align-self:end;margin-bottom:2px}
.calc-result{margin-top:12px;background:var(--input);border:1px solid var(--border);border-radius:14px;padding:12px;text-align:center}
.calc-result .big{font-size:clamp(1.3rem,3vw,1.65rem);font-weight:800;
background:linear-gradient(120deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.calc-result .rate-line{font-size:.78rem;color:var(--text-faint);margin-top:5px}
/* ===== Table ===== */
.table-tools{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.table-tools input{flex:1;min-width:160px}
.table-scroll{max-height:430px;overflow:auto;border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:.86rem}
thead th{position:sticky;top:0;background:var(--card-solid);text-align:left;padding:11px 12px;
font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--text-faint);cursor:pointer;user-select:none;white-space:nowrap;border-bottom:1px solid var(--border)}
thead th:hover{color:var(--accent)}
thead th .arr{opacity:.5;font-size:.7rem}
tbody td{padding:10px 12px;border-bottom:1px solid var(--border)}
tbody tr{transition:background var(--transition)}
tbody tr:hover{background:color-mix(in srgb,var(--accent) 8%,transparent)}
tbody td.code{font-weight:700}
tbody td.name{color:var(--text-dim)}
.num{text-align:right;font-variant-numeric:tabular-nums}
.row-strong{box-shadow:inset 3px 0 0 var(--c-teal)}
.row-weak{box-shadow:inset 3px 0 0 var(--c-down)}
.pill{font-size:.68rem;font-weight:700;padding:3px 8px;border-radius:7px}
.pill.up{background:color-mix(in srgb,var(--pos) 16%,transparent);color:var(--pos)}
.pill.down{background:color-mix(in srgb,var(--neg) 18%,transparent);color:var(--neg)}
.pill.flat{background:color-mix(in srgb,var(--c-slate) 20%,transparent);color:var(--text-dim)}
.lead{font-size:.64rem;font-weight:800;letter-spacing:.06em;margin-left:6px;padding:2px 6px;border-radius:6px;text-transform:uppercase}
.lead.s{background:color-mix(in srgb,var(--c-teal) 22%,transparent);color:var(--c-teal)}
.lead.w{background:color-mix(in srgb,var(--c-down) 24%,transparent);color:var(--neg)}
/* ===== Loading / skeleton / error ===== */
.skeleton{background:linear-gradient(90deg,var(--input) 25%,color-mix(in srgb,var(--accent) 10%,var(--input)) 50%,var(--input) 75%);
background-size:200% 100%;animation:shimmer 1.3s infinite;border-radius:8px;color:transparent!important}
@keyframes shimmer{to{background-position:-200% 0}}
#overlay{position:fixed;inset:0;background:color-mix(in srgb,var(--bg-0) 70%,transparent);backdrop-filter:blur(3px);
display:none;place-items:center;z-index:50}
#overlay.show{display:grid}
.loader{display:flex;flex-direction:column;align-items:center;gap:14px;color:var(--text-dim);font-size:.85rem}
.ring{width:46px;height:46px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--accent);animation:spin .8s linear infinite}
#toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(120%);
background:var(--card-solid);border:1px solid var(--neg);color:var(--text);padding:13px 18px;border-radius:13px;
box-shadow:var(--shadow);z-index:60;transition:transform .35s ease;max-width:90vw;font-size:.86rem;display:flex;gap:10px;align-items:center}
#toast.show{transform:translateX(-50%) translateY(0)}
#toast .x{cursor:pointer;color:var(--text-faint)}
footer{text-align:center;color:var(--text-faint);font-size:.74rem;margin-top:30px;line-height:1.6}
footer a{color:var(--accent);text-decoration:none}
</style>
</head>
<body>
<div class="wrap">
<!-- ============================ HEADER ============================ -->
<header class="topbar">
<div class="brand">
<div class="logo">₣</div>
<div>
<h1>FX&nbsp;Pulse</h1>
<small>Foreign Exchange Dashboard</small>
</div>
</div>
<div class="controls">
<div class="field">
<label for="baseSel">Base</label>
<select id="baseSel" aria-label="Base currency"></select>
</div>
<div class="field">
<label for="targetSel">Target</label>
<select id="targetSel" aria-label="Target currency"></select>
</div>
<button class="btn icon" id="refreshBtn" title="Refresh data" aria-label="Refresh">
<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"><path d="M23 4v6h-6"/><path d="M1 20v-6h6"/><path d="M3.5 9a9 9 0 0 1 14.9-3.4L23 10M1 14l4.6 4.4A9 9 0 0 0 20.5 15"/></svg>
</button>
<button class="btn icon" id="themeBtn" title="Toggle theme" aria-label="Toggle theme">
<span id="themeIcon">🌙</span>
</button>
</div>
</header>
<div class="updated" style="margin:-8px 0 18px 2px">
<span class="dot"></span> Last updated: <strong id="updatedAt">—</strong>
<span id="srcLabel" style="margin-left:6px"></span>
</div>
<!-- ====================== TOP ROW : value / AI / calculator ====================== -->
<section class="grid top-grid">
<!-- Current value -->
<article class="card" id="valueCard">
<h2>📈 Current Value</h2>
<div class="pair-row">
<span class="pair" id="pairLabel">—/—</span>
<span class="badge flat" id="trendBadge">Stable</span>
</div>
<div class="rate" id="rateBig">—</div>
<div class="sub">
<span class="change flat" id="changeVal">—</span>
<span class="pair" id="changeNote">daily change</span>
</div>
<div class="mini-stats">
<div class="mini"><div class="k">7D High</div><div class="v" id="m7high">—</div></div>
<div class="mini"><div class="k">7D Low</div><div class="v" id="m7low">—</div></div>
<div class="mini"><div class="k">Volatility</div><div class="v" id="mvol">—</div></div>
</div>
</article>
<!-- AI insight -->
<article class="card" id="aiCard">
<h2>🤖 AI Insight</h2>
<div id="aiList">
<div class="insight"><div class="ic">…</div><p>Analyzing market data…</p></div>
</div>
</article>
<!-- Calculator -->
<article class="card" id="calcCard">
<h2>🧮 Currency Calculator</h2>
<div class="calc-grid">
<div class="field">
<label for="calcAmount">Amount</label>
<input type="number" id="calcAmount" value="100" min="0" step="any" />
<select id="calcFrom" style="margin-top:8px"></select>
</div>
<button class="btn icon calc-swap" id="calcSwap" title="Swap currencies">⇄</button>
<div class="field">
<label for="calcTo">Converts to</label>
<select id="calcTo"></select>
</div>
</div>
<div class="calc-result">
<div class="big" id="calcOut">—</div>
<div class="rate-line" id="calcRate">—</div>
</div>
</article>
</section>
<!-- ====================== CHART ROW : candlestick / line ====================== -->
<section class="grid chart-grid">
<article class="card">
<div class="chart-head">
<h2 style="margin:0">🕯️ Candlestick — Daily Estimated Candles</h2>
</div>
<div class="chart-box"><canvas id="candleChart"></canvas></div>
<p class="est-note">* Estimated candles: previous-day rate = open, current-day rate = close; high/low approximated from daily range &amp; recent volatility. Not exchange-provided OHLC.</p>
</article>
<article class="card">
<div class="chart-head">
<h2 style="margin:0">📉 Historical Rate</h2>
<div class="range-btns" id="rangeBtns">
<button data-d="7">7D</button>
<button data-d="14">14D</button>
<button data-d="30" class="active">30D</button>
<button data-d="90">90D</button>
</div>
</div>
<div class="chart-box"><canvas id="lineChart"></canvas></div>
<p class="est-note">Solid line = exchange rate · dashed line = 7-period moving average.</p>
</article>
</section>
<!-- ====================== HEATMAP + PATTERNS ====================== -->
<section class="grid bottom-grid">
<article class="card">
<h2>🌡️ Currency Strength Heatmap <span style="text-transform:none;letter-spacing:0;font-weight:500;color:var(--text-faint)">(7-day, basket-weighted)</span></h2>
<div class="heat-grid" id="heatGrid"></div>
<div class="heat-legend"><span>Weak</span><div class="heat-bar"></div><span>Strong</span></div>
</article>
<!-- Patterns -->
<article class="card" id="patternCard">
<h2>🔎 Pattern &amp; Trend Analysis</h2>
<div id="patternList">
<div class="pattern"><span class="tag t-flat">scan</span><small>Detecting patterns…</small></div>
</div>
</article>
</section>
<!-- ====================== TABLE ====================== -->
<section class="card">
<h2>💱 Exchange Rates <span style="text-transform:none;letter-spacing:0;font-weight:500;color:var(--text-faint)" id="tableBaseLbl"></span></h2>
<div class="table-tools">
<input type="search" id="tableSearch" placeholder="Search currency code or name…" />
<span class="updated" id="tableCount"></span>
</div>
<div class="table-scroll">
<table id="rateTable">
<thead>
<tr>
<th data-sort="code">Code <span class="arr"></span></th>
<th data-sort="name">Name <span class="arr"></span></th>
<th data-sort="rate" class="num">Rate <span class="arr"></span></th>
<th data-sort="change" class="num">Change % <span class="arr"></span></th>
<th data-sort="change">Trend</th>
</tr>
</thead>
<tbody id="rateBody"></tbody>
</table>
</div>
</section>
<footer>
Data: <a href="https://github.com/fawazahmed0/exchange-api" target="_blank" rel="noopener">fawazahmed0/exchange-api</a> · free, daily rates · automatic CDN fallback.<br/>
Candlestick OHLC is estimated from daily values for illustration only. Not financial advice.
</footer>
</div>
<!-- Loading overlay + error toast -->
<div id="overlay"><div class="loader"><div class="ring"></div><span id="loadMsg">Fetching exchange data…</span></div></div>
<div id="toast"><span id="toastMsg"></span><span class="x" onclick="document.getElementById('toast').classList.remove('show')">✕</span></div>
<script>
"use strict";
/* =========================================================================
FX PULSE — single-file dashboard logic
FX PULSE — dashboard logic
---------------------------------------------------------------------------
Sections:
1. Config & state
@@ -977,6 +571,3 @@ async function init(){
// Wait for Chart.js (and financial plugin) then boot.
window.addEventListener("DOMContentLoaded",init);
</script>
</body>
</html>
index.html
+183
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<!DOCTYPE html>
<html lang="en" data-theme="dark">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>FX Pulse — Foreign Exchange Dashboard</title>
<!-- ===== Chart libraries (CDN, charts only) ===== -->
<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.3/dist/chart.umd.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/luxon@3.4.4/build/global/luxon.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-adapter-luxon@1.3.1/dist/chartjs-adapter-luxon.umd.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-chart-financial@0.2.1/dist/chartjs-chart-financial.min.js"></script>
<!-- ===== Styles ===== -->
<link rel="stylesheet" href="styles.css" />
<!-- ===== App logic (deferred so it runs after the chart libs above) ===== -->
<script src="app.js" defer></script>
</head>
<body>
<div class="wrap">
<!-- ============================ HEADER ============================ -->
<header class="topbar">
<div class="brand">
<div class="logo">₣</div>
<div>
<h1>FX&nbsp;Pulse</h1>
<small>Foreign Exchange Dashboard</small>
</div>
</div>
<div class="controls">
<div class="field">
<label for="baseSel">Base</label>
<select id="baseSel" aria-label="Base currency"></select>
</div>
<div class="field">
<label for="targetSel">Target</label>
<select id="targetSel" aria-label="Target currency"></select>
</div>
<button class="btn icon" id="refreshBtn" title="Refresh data" aria-label="Refresh">
<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"><path d="M23 4v6h-6"/><path d="M1 20v-6h6"/><path d="M3.5 9a9 9 0 0 1 14.9-3.4L23 10M1 14l4.6 4.4A9 9 0 0 0 20.5 15"/></svg>
</button>
<button class="btn icon" id="themeBtn" title="Toggle theme" aria-label="Toggle theme">
<span id="themeIcon">🌙</span>
</button>
</div>
</header>
<div class="updated" style="margin:-8px 0 18px 2px">
<span class="dot"></span> Last updated: <strong id="updatedAt">—</strong>
<span id="srcLabel" style="margin-left:6px"></span>
</div>
<!-- ====================== TOP ROW : value / AI / patterns ====================== -->
<section class="grid top-grid">
<!-- Current value -->
<article class="card" id="valueCard">
<h2>📈 Current Value</h2>
<div class="pair-row">
<span class="pair" id="pairLabel">—/—</span>
<span class="badge flat" id="trendBadge">Stable</span>
</div>
<div class="rate" id="rateBig">—</div>
<div class="sub">
<span class="change flat" id="changeVal">—</span>
<span class="pair" id="changeNote">daily change</span>
</div>
<div class="mini-stats">
<div class="mini"><div class="k">7D High</div><div class="v" id="m7high">—</div></div>
<div class="mini"><div class="k">7D Low</div><div class="v" id="m7low">—</div></div>
<div class="mini"><div class="k">Volatility</div><div class="v" id="mvol">—</div></div>
</div>
</article>
<!-- AI insight -->
<article class="card" id="aiCard">
<h2>🤖 AI Insight</h2>
<div id="aiList">
<div class="insight"><div class="ic">…</div><p>Analyzing market data…</p></div>
</div>
</article>
<!-- Patterns -->
<article class="card" id="patternCard">
<h2>🔎 Pattern &amp; Trend Analysis</h2>
<div id="patternList">
<div class="pattern"><span class="tag t-flat">scan</span><small>Detecting patterns…</small></div>
</div>
</article>
</section>
<!-- ====================== CHART ROW : candlestick / line ====================== -->
<section class="grid chart-grid">
<article class="card">
<div class="chart-head">
<h2 style="margin:0">🕯️ Candlestick — Daily Estimated Candles</h2>
</div>
<div class="chart-box"><canvas id="candleChart"></canvas></div>
<p class="est-note">* Estimated candles: previous-day rate = open, current-day rate = close; high/low approximated from daily range &amp; recent volatility. Not exchange-provided OHLC.</p>
</article>
<article class="card">
<div class="chart-head">
<h2 style="margin:0">📉 Historical Rate</h2>
<div class="range-btns" id="rangeBtns">
<button data-d="7">7D</button>
<button data-d="14">14D</button>
<button data-d="30" class="active">30D</button>
<button data-d="90">90D</button>
</div>
</div>
<div class="chart-box"><canvas id="lineChart"></canvas></div>
<p class="est-note">Solid line = exchange rate · dashed line = 7-period moving average.</p>
</article>
</section>
<!-- ====================== HEATMAP + CALCULATOR ====================== -->
<section class="grid bottom-grid">
<article class="card">
<h2>🌡️ Currency Strength Heatmap <span style="text-transform:none;letter-spacing:0;font-weight:500;color:var(--text-faint)">(7-day, basket-weighted)</span></h2>
<div class="heat-grid" id="heatGrid"></div>
<div class="heat-legend"><span>Weak</span><div class="heat-bar"></div><span>Strong</span></div>
</article>
<article class="card">
<h2>🧮 Currency Calculator</h2>
<div class="calc-grid">
<div class="field">
<label for="calcAmount">Amount</label>
<input type="number" id="calcAmount" value="100" min="0" step="any" />
<select id="calcFrom" style="margin-top:8px"></select>
</div>
<button class="btn icon calc-swap" id="calcSwap" title="Swap currencies">⇄</button>
<div class="field">
<label for="calcTo">Converts to</label>
<select id="calcTo"></select>
</div>
</div>
<div class="calc-result">
<div class="big" id="calcOut">—</div>
<div class="rate-line" id="calcRate">—</div>
</div>
</article>
</section>
<!-- ====================== TABLE ====================== -->
<section class="card">
<h2>💱 Exchange Rates <span style="text-transform:none;letter-spacing:0;font-weight:500;color:var(--text-faint)" id="tableBaseLbl"></span></h2>
<div class="table-tools">
<input type="search" id="tableSearch" placeholder="Search currency code or name…" />
<span class="updated" id="tableCount"></span>
</div>
<div class="table-scroll">
<table id="rateTable">
<thead>
<tr>
<th data-sort="code">Code <span class="arr"></span></th>
<th data-sort="name">Name <span class="arr"></span></th>
<th data-sort="rate" class="num">Rate <span class="arr"></span></th>
<th data-sort="change" class="num">Change % <span class="arr"></span></th>
<th data-sort="change">Trend</th>
</tr>
</thead>
<tbody id="rateBody"></tbody>
</table>
</div>
</section>
<footer>
Data: <a href="https://github.com/fawazahmed0/exchange-api" target="_blank" rel="noopener">fawazahmed0/exchange-api</a> · free, daily rates · automatic CDN fallback.<br/>
Candlestick OHLC is estimated from daily values for illustration only. Not financial advice.
</footer>
</div>
<!-- Loading overlay + error toast -->
<div id="overlay"><div class="loader"><div class="ring"></div><span id="loadMsg">Fetching exchange data…</span></div></div>
<div id="toast"><span id="toastMsg"></span><span class="x" onclick="document.getElementById('toast').classList.remove('show')">✕</span></div>
</body>
</html>
styles.css
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/* =========================================================================
THEME TOKENS — cool palette only (navy, deep blue, cyan, teal, slate,
ice blue, soft mint). No purple anywhere.
========================================================================= */
:root{
--c-cyan:#22d3ee; --c-teal:#2dd4bf; --c-blue:#3b82f6;
--c-mint:#6ee7b7; --c-sky:#38bdf8; --c-slate:#64748b;
--c-up:#2dd4bf; --c-down:#5b8bbf; /* cool up/down for candles */
--radius:18px;
--transition:.25s cubic-bezier(.4,0,.2,1);
--font:"Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
}
/* ---------- Dark theme (default) : professional, finance-focused -------- */
html[data-theme="dark"]{
--bg-0:#070d1a; --bg-1:#0b1428; --bg-grad:radial-gradient(1200px 600px at 80% -10%,#0f2748 0,transparent 60%),radial-gradient(900px 500px at -10% 110%,#062a33 0,transparent 55%);
--card:rgba(17,29,53,.62);
--card-solid:#111d35;
--border:rgba(120,170,225,.14);
--text:#e8f1ff; --text-dim:#9fb3d1; --text-faint:#6c84a6;
--accent:var(--c-cyan); --accent-2:var(--c-teal);
--shadow:0 18px 45px -20px rgba(0,0,0,.75);
--pos:#34d399; --neg:#5b8bbf; --grid:rgba(120,170,225,.10);
--input:rgba(8,16,32,.7);
}
/* ---------- Light theme : clean & airy ---------------------------------- */
html[data-theme="light"]{
--bg-0:#eef4fb; --bg-1:#f6fafe; --bg-grad:radial-gradient(1100px 600px at 85% -10%,#dceefb 0,transparent 60%),radial-gradient(900px 500px at -10% 110%,#d9f7f0 0,transparent 55%);
--card:rgba(255,255,255,.72);
--card-solid:#ffffff;
--border:rgba(40,90,140,.14);
--text:#0c2440; --text-dim:#3f5b7f; --text-faint:#73879f;
--accent:#0e9bb8; --accent-2:#0d9488;
--shadow:0 16px 38px -22px rgba(20,60,110,.40);
--pos:#0d9488; --neg:#4f7eb0; --grid:rgba(40,90,140,.10);
--input:rgba(255,255,255,.85);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
font-family:var(--font);
color:var(--text);
background:var(--bg-0);
background-image:var(--bg-grad);
background-attachment:fixed;
min-height:100vh;
line-height:1.45;
transition:background var(--transition),color var(--transition);
-webkit-font-smoothing:antialiased;
}
/* ===== Layout shell ===== */
.wrap{max-width:1320px;margin:0 auto;padding:22px clamp(14px,3vw,34px) 60px}
/* ===== Glass card ===== */
.card{
background:var(--card);
border:1px solid var(--border);
border-radius:var(--radius);
box-shadow:var(--shadow);
backdrop-filter:blur(14px) saturate(140%);
-webkit-backdrop-filter:blur(14px) saturate(140%);
padding:20px;
transition:transform var(--transition),box-shadow var(--transition),border var(--transition);
}
.card:hover{transform:translateY(-3px);box-shadow:0 24px 55px -22px rgba(0,0,0,.6)}
.card h2,.card h3{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--text-dim);font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
/* ===== Header ===== */
header.topbar{
display:flex;flex-wrap:wrap;align-items:center;gap:14px;
margin-bottom:22px;
}
.brand{display:flex;align-items:center;gap:12px;margin-right:auto}
.logo{
width:44px;height:44px;border-radius:13px;flex:none;
background:linear-gradient(135deg,var(--c-cyan),var(--c-teal));
display:grid;place-items:center;color:#04222b;font-weight:900;font-size:1.2rem;
box-shadow:0 8px 22px -6px var(--c-cyan);
}
.brand h1{font-size:1.25rem;letter-spacing:.3px}
.brand small{display:block;color:var(--text-faint);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase}
.controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.field{display:flex;flex-direction:column;gap:3px}
.field label{font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text-faint);padding-left:4px}
select,input,button{font-family:inherit;color:var(--text)}
select,input{
background:var(--input);border:1px solid var(--border);border-radius:11px;
padding:9px 12px;font-size:.9rem;min-width:120px;outline:none;transition:border var(--transition),box-shadow var(--transition);
}
select:focus,input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 25%,transparent)}
.btn{
cursor:pointer;border:1px solid var(--border);border-radius:11px;
background:var(--input);padding:9px 14px;font-size:.85rem;font-weight:600;
display:inline-flex;align-items:center;gap:7px;transition:all var(--transition);
}
.btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--c-cyan),var(--c-teal));color:#03222b;border:none}
.btn.primary:hover{filter:brightness(1.08);color:#03222b}
.btn.icon{padding:9px 11px}
#refreshBtn.spin svg{animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.updated{font-size:.72rem;color:var(--text-faint);display:flex;align-items:center;gap:6px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--pos);box-shadow:0 0 8px var(--pos)}
/* ===== Grid ===== */
.grid{display:grid;gap:18px}
.top-grid{grid-template-columns:1.15fr 1fr 1fr;margin-bottom:18px}
.chart-grid{grid-template-columns:1fr 1fr;margin-bottom:18px}
.bottom-grid{grid-template-columns:1.4fr 1fr;margin-bottom:18px}
@media(max-width:1040px){.top-grid,.chart-grid,.bottom-grid{grid-template-columns:1fr}}
/* ===== Current value card ===== */
.pair-row{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.pair-row .pair{font-size:1rem;color:var(--text-dim);font-weight:600}
.rate{font-size:clamp(2.2rem,5vw,3rem);font-weight:800;letter-spacing:-1px;line-height:1.1;
background:linear-gradient(120deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{margin-top:6px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:var(--text-dim);font-size:.9rem}
.change{font-weight:700}
.change.up{color:var(--pos)} .change.down{color:var(--neg)}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:.72rem;font-weight:700;
padding:5px 11px;border-radius:999px;letter-spacing:.04em;border:1px solid transparent}
.badge.up{background:color-mix(in srgb,var(--pos) 16%,transparent);color:var(--pos);border-color:color-mix(in srgb,var(--pos) 35%,transparent)}
.badge.down{background:color-mix(in srgb,var(--neg) 16%,transparent);color:var(--neg);border-color:color-mix(in srgb,var(--neg) 35%,transparent)}
.badge.flat{background:color-mix(in srgb,var(--c-slate) 20%,transparent);color:var(--text-dim);border-color:color-mix(in srgb,var(--c-slate) 35%,transparent)}
.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
.mini{background:var(--input);border:1px solid var(--border);border-radius:12px;padding:10px}
.mini .k{font-size:.62rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-faint)}
.mini .v{font-size:1rem;font-weight:700;margin-top:3px}
/* ===== AI / pattern lists ===== */
.insight{display:flex;gap:11px;padding:11px 0;border-bottom:1px dashed var(--border)}
.insight:last-child{border-bottom:none}
.insight .ic{flex:none;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;font-size:.95rem;
background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent)}
.insight p{font-size:.86rem;color:var(--text);line-height:1.4}
.insight p span{color:var(--text-faint);display:block;font-size:.74rem;margin-top:2px}
.pattern{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px dashed var(--border)}
.pattern:last-child{border-bottom:none}
.tag{font-size:.66rem;font-weight:800;letter-spacing:.05em;padding:4px 9px;border-radius:8px;flex:none;text-transform:uppercase}
.tag.t-up{background:color-mix(in srgb,var(--c-teal) 20%,transparent);color:var(--c-teal)}
.tag.t-down{background:color-mix(in srgb,var(--c-down) 22%,transparent);color:var(--neg)}
.tag.t-flat{background:color-mix(in srgb,var(--c-slate) 22%,transparent);color:var(--text-dim)}
.tag.t-vol{background:color-mix(in srgb,var(--c-sky) 22%,transparent);color:var(--c-sky)}
.tag.t-break{background:color-mix(in srgb,var(--c-cyan) 22%,transparent);color:var(--c-cyan)}
.pattern small{color:var(--text-dim);font-size:.8rem}
/* ===== Charts ===== */
.chart-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.chart-box{position:relative;height:320px}
.range-btns{display:flex;gap:6px;background:var(--input);padding:4px;border-radius:11px;border:1px solid var(--border)}
.range-btns button{border:none;background:transparent;color:var(--text-dim);font-size:.78rem;font-weight:600;
padding:5px 11px;border-radius:8px;cursor:pointer;transition:all var(--transition)}
.range-btns button.active{background:linear-gradient(135deg,var(--c-cyan),var(--c-teal));color:#04222b}
.est-note{font-size:.7rem;color:var(--text-faint);font-style:italic;margin-top:8px}
/* ===== Heatmap ===== */
.heat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px}
.heat-cell{border-radius:13px;padding:14px 12px;color:#eafcff;position:relative;overflow:hidden;
border:1px solid rgba(255,255,255,.08);transition:transform var(--transition)}
.heat-cell:hover{transform:scale(1.04)}
.heat-cell .code{font-weight:800;font-size:1.05rem;letter-spacing:.04em}
.heat-cell .pct{font-size:.78rem;opacity:.92;font-weight:600;margin-top:3px}
.heat-cell .lbl{font-size:.62rem;opacity:.8;text-transform:uppercase;letter-spacing:.08em;margin-top:6px}
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.heat-bar{flex:1;height:9px;border-radius:6px;background:linear-gradient(90deg,#0b2233,#0e4a5a,#138a8a,#1fb6a6,#7ff0c8)}
/* ===== Calculator ===== */
.calc-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:end}
@media(max-width:540px){.calc-grid{grid-template-columns:1fr}}
.calc-swap{align-self:end;margin-bottom:2px}
.calc-result{margin-top:16px;background:var(--input);border:1px solid var(--border);border-radius:14px;padding:16px;text-align:center}
.calc-result .big{font-size:clamp(1.5rem,4vw,2rem);font-weight:800;
background:linear-gradient(120deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.calc-result .rate-line{font-size:.78rem;color:var(--text-faint);margin-top:5px}
/* ===== Table ===== */
.table-tools{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.table-tools input{flex:1;min-width:160px}
.table-scroll{max-height:430px;overflow:auto;border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:.86rem}
thead th{position:sticky;top:0;background:var(--card-solid);text-align:left;padding:11px 12px;
font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--text-faint);cursor:pointer;user-select:none;white-space:nowrap;border-bottom:1px solid var(--border)}
thead th:hover{color:var(--accent)}
thead th .arr{opacity:.5;font-size:.7rem}
tbody td{padding:10px 12px;border-bottom:1px solid var(--border)}
tbody tr{transition:background var(--transition)}
tbody tr:hover{background:color-mix(in srgb,var(--accent) 8%,transparent)}
tbody td.code{font-weight:700}
tbody td.name{color:var(--text-dim)}
.num{text-align:right;font-variant-numeric:tabular-nums}
.row-strong{box-shadow:inset 3px 0 0 var(--c-teal)}
.row-weak{box-shadow:inset 3px 0 0 var(--c-down)}
.pill{font-size:.68rem;font-weight:700;padding:3px 8px;border-radius:7px}
.pill.up{background:color-mix(in srgb,var(--pos) 16%,transparent);color:var(--pos)}
.pill.down{background:color-mix(in srgb,var(--neg) 18%,transparent);color:var(--neg)}
.pill.flat{background:color-mix(in srgb,var(--c-slate) 20%,transparent);color:var(--text-dim)}
.lead{font-size:.64rem;font-weight:800;letter-spacing:.06em;margin-left:6px;padding:2px 6px;border-radius:6px;text-transform:uppercase}
.lead.s{background:color-mix(in srgb,var(--c-teal) 22%,transparent);color:var(--c-teal)}
.lead.w{background:color-mix(in srgb,var(--c-down) 24%,transparent);color:var(--neg)}
/* ===== Loading / skeleton / error ===== */
.skeleton{background:linear-gradient(90deg,var(--input) 25%,color-mix(in srgb,var(--accent) 10%,var(--input)) 50%,var(--input) 75%);
background-size:200% 100%;animation:shimmer 1.3s infinite;border-radius:8px;color:transparent!important}
@keyframes shimmer{to{background-position:-200% 0}}
#overlay{position:fixed;inset:0;background:color-mix(in srgb,var(--bg-0) 70%,transparent);backdrop-filter:blur(3px);
display:none;place-items:center;z-index:50}
#overlay.show{display:grid}
.loader{display:flex;flex-direction:column;align-items:center;gap:14px;color:var(--text-dim);font-size:.85rem}
.ring{width:46px;height:46px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--accent);animation:spin .8s linear infinite}
#toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(120%);
background:var(--card-solid);border:1px solid var(--neg);color:var(--text);padding:13px 18px;border-radius:13px;
box-shadow:var(--shadow);z-index:60;transition:transform .35s ease;max-width:90vw;font-size:.86rem;display:flex;gap:10px;align-items:center}
#toast.show{transform:translateX(-50%) translateY(0)}
#toast .x{cursor:pointer;color:var(--text-faint)}
footer{text-align:center;color:var(--text-faint);font-size:.74rem;margin-top:30px;line-height:1.6}
footer a{color:var(--accent);text-decoration:none}