Build a unit converter as a static web app in this directory: index.html, style.css, co…

pigpt-5.5 · 24 steps · 3m 36s · 5 filessession e021017c-09e@patrick-toulme

Build a unit converter as a static web app in this directory: index.html, style.css, convert.js. Categories: length, mass, temperature, data size, time. Instant two-way conversion between any pair in a category, swap button, precision selector, recent-conversions list in localStorage, keyboard-first UX, dark theme, and tests.html + tests.js exercising the conversion math including temperature edge cases. Run the tests headless with node and fix what fails.

same matchpi · 17 steps pi · 26 steps pi · 24 steps

compare in arena

step 14 / 24

style.csschange 1/1

:root {
  color-scheme: dark;
  --bg: #080b12;
  --bg-soft: #0f1524;
  --panel: rgba(20, 29, 48, 0.86);
  --panel-strong: #182238;
  --text: #f5f7fb;
  --muted: #9ba9c4;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --danger: #fb7185;
  --ring: rgba(125, 211, 252, 0.5);
  --border: rgba(148, 163, 184, 0.2);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
 
* { box-sizing: border-box; }
 
body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 32rem),
    radial-gradient(circle at bottom right, rgba(129, 140, 248, 0.16), transparent 34rem),
    var(--bg);
}
 
button, input, select { font: inherit; }
 
.app {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0;
}
 
.hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}
 
.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
 
h1, h2, p { margin-top: 0; }
 
h1 {
  margin-bottom: 10px;
  font-size: clamp(2.2rem, 8vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.07em;
}
 
.lede {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.12rem;
}
 
.panel {
  padding: 24px;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: linear-gradient(180deg, var(--panel), rgba(15, 21, 36, 0.78));
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(18px);
}
 
.toolbar {
  display: grid;
  grid-template-columns: 1fr minmax(180px, 240px);
  gap: 16px;
  margin-bottom: 18px;
}
 
label span, .value-card > label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
 
input, select, button, .test-link {
  border: 1px solid var(--border);
  border-radius: 16px;
  color: var(--text);
  background: var(--panel-strong);
}
 
input, select {
  width: 100%;
  padding: 13px 14px;
  outline: none;
}
 
input {
  font-size: clamp(1.6rem, 4vw, 3rem);
  font-weight: 750;
  letter-spacing: -0.04em;
}
 
select { cursor: pointer; }
 
button, .test-link {
  cursor: pointer;
  text-decoration: none;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}
 
button:hover, .test-link:hover {
  border-color: rgba(125, 211, 252, 0.6);
  background: #1d2b46;
}
 
button:active, .test-link:active { transform: translateY(1px); }
 
:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 3px;
}
 
.test-link {
  flex: none;
  padding: 10px 14px;
  color: var(--accent);
  font-weight: 800;
}
 
.converter-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: end;
  gap: 16px;
}
 
.value-card {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: rgba(8, 11, 18, 0.36);
}
 
.value-card input { margin-bottom: 12px; }
 
.swap {
  width: 56px;
  height: 56px;
  margin-bottom: 44px;
  border-radius: 999px;
  color: #06101a;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  font-size: 1.65rem;
  font-weight: 900;
}
 
.status {
  min-height: 1.5em;
  margin: 18px 0 8px;
  color: var(--accent);
  font-weight: 700;
}
 
.status.error { color: var(--danger); }
 
.shortcuts {
  color: var(--muted);
  font-size: 0.92rem;
}
 
kbd {
  display: inline-block;
  padding: 2px 7px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 7px;
  color: var(--text);
  background: #0a1020;
  font-size: 0.82em;
}
 
.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}
 
.section-heading h2 { margin: 0; }
 
.section-heading button {
  padding: 8px 12px;
  color: var(--muted);
}
 
#recentList {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
}
 
#recentList button {
  width: 100%;
  padding: 12px 14px;
  text-align: left;
  color: var(--text);
}
 
#recentList .empty {
  color: var(--muted);
}
 
@media (max-width: 760px) {
  .app { width: min(100% - 20px, 980px); padding: 24px 0; }
  .hero, .toolbar, .converter-grid { grid-template-columns: 1fr; display: grid; }
  .test-link { justify-self: start; }
  .swap { margin: 0; justify-self: center; transform: rotate(90deg); }
  .swap:active { transform: rotate(90deg) translateY(1px); }
  .panel { padding: 18px; border-radius: 22px; }
}
 

236 linescss

Writes tests.js

Files at this step

drag the rail to scrub

Discussion

No comments yet. Start the discussion. Recorded by @patrick-toulme.

#css #gpt #gpt-5.5 #html #javascript #pi #quick #testing #ui

t3-high

← all sessions