:root {
  --lime: #c8ff00;
  --ink: #111;
  --paper: #f4f4f0;
  --muted: #5a5a52;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: ui-sans-serif, system-ui, sans-serif;
  background: var(--paper);
  color: var(--ink);
  min-height: 100vh;
}
a { color: inherit; }
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  background: var(--lime);
  border-bottom: 3px solid var(--ink);
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 900;
  font-size: 22px;
  letter-spacing: -0.03em;
}
.brand img { width: 56px; height: 56px; object-fit: cover; object-position: center 40%; border: 2px solid var(--ink); }
.hero {
  background: var(--lime);
  border-bottom: 3px solid var(--ink);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px;
}
.hero img {
  width: min(42vw, 280px);
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}
nav { display: flex; gap: 14px; font-weight: 700; }
.badge {
  display: inline-block;
  background: var(--ink);
  color: var(--lime);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 10px;
  border-radius: 999px;
}
.wrap { max-width: 980px; margin: 0 auto; padding: 28px 18px 72px; }
h1 { font-size: clamp(32px, 6vw, 52px); letter-spacing: -0.04em; margin: 12px 0 8px; }
.lede { color: var(--muted); max-width: 52ch; margin-bottom: 22px; }
.tweet { width: 100%; max-width: 560px; border: 3px solid var(--ink); display: block; margin: 18px 0 28px; }
ol.tl { padding-left: 22px; }
ol.tl li { margin: 10px 0; line-height: 1.45; }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.ca, .xchip {
  border: 2px solid var(--ink);
  background: #fff;
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
  text-decoration: none;
  font-family: ui-monospace, Menlo, monospace;
}
.xchip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 8px;
}
.xchip img {
  width: 32px;
  height: 32px;
  display: block;
}
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 800px) {
  .grid { grid-template-columns: 1fr 1fr; }
}
.card {
  border: 3px solid var(--ink);
  background: #fff;
  padding: 18px;
}
.card h2 { font-size: 20px; margin-bottom: 12px; }
.card.selected { outline: 4px solid var(--lime); }
label { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; margin: 10px 0 4px; }
input, select {
  width: 100%;
  border: 2px solid var(--ink);
  padding: 10px;
  font-size: 16px;
}
.modes { display: flex; gap: 8px; }
.modes button, .go {
  border: 2px solid var(--ink);
  background: #fff;
  padding: 10px 14px;
  font-weight: 700;
  cursor: pointer;
}
.modes button.on, .go { background: var(--lime); }
.go { width: 100%; margin-top: 14px; font-size: 16px; }
.status { margin-top: 12px; font-family: ui-monospace, Menlo, monospace; font-size: 13px; }
.pool { word-break: break-all; font-size: 12px; color: var(--muted); margin-top: 8px; }
footer {
  border-top: 3px solid var(--ink);
  padding: 18px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}
.todo { font-size: 11px; color: #b42318; margin-top: 6px; }