* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'SF Mono', Monaco, Inconsolata, 'Fira Code', 'Roboto Mono', monospace;
  background: #030712;
  color: #e5e7eb;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

#field { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; }

main { position: relative; max-width: 720px; margin: 0 auto; padding: 80px 40px; }

header { margin-bottom: 48px; }
.lede { margin-top: 14px; color: #e5e7eb; }
h1 { font-size: 24px; font-weight: 400; color: #f8fafc; letter-spacing: -0.02em; margin-bottom: 4px; }
h2 { font-size: 14px; font-weight: 600; color: #f8fafc; margin-bottom: 8px; }
section { margin-bottom: 32px; }
p { margin-bottom: 6px; }
.sub { color: #94a3b8; }

a, .u { color: #f8fafc; text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { opacity: 0.6; }


details { margin-bottom: 8px; }
summary { cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::before { content: '▸'; display: inline-block; width: 14px; font-size: 11px; color: #94a3b8; transition: transform 0.2s; }
details[open] > summary::before { transform: rotate(90deg); }
summary h2 { display: inline; }
.more { margin: 8px 0 12px 6px; padding-left: 12px; border-left: 1px solid rgba(148, 163, 184, 0.22); }

.gh { width: 100%; margin-top: 8px; filter: grayscale(1) contrast(1.15) invert(1); opacity: 0.72; }
.cal { width: 100%; height: 460px; border: 1px solid rgba(148, 163, 184, 0.22); border-radius: 8px; margin-top: 12px; }

footer {
  margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(148, 163, 184, 0.22);
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 13px;
}
footer a { color: #94a3b8; text-decoration: none; }
footer a:hover { color: #f8fafc; opacity: 1; }
.btn { color: #f8fafc; background: rgba(15, 23, 42, 0.82); padding: 6px 12px; border: 1px solid rgba(148, 163, 184, 0.28); border-radius: 4px; }

@media (max-width: 640px) {
  main { padding: 48px 16px; }
  h1 { font-size: 20px; }
}