:root {
  --ink: #111;
  --muted: #555;
  --bg: #fafafa;
  --accent: #0f766e;
  --radius: 6px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 17px/1.55 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
.hero, .lead-form, .deep-dive, footer {
  max-width: 640px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
}
h1 { margin: 0 0 .25em; font-size: 2rem; }
h2 { margin-top: 0; }
.abstract { color: var(--muted); }

.lead-form { background: #fff; border-radius: var(--radius); margin-top: 1rem; }
.lead-form form { display: grid; gap: .75rem; }
.lead-form label { display: grid; gap: .25rem; font-weight: 600; }
.lead-form input, .lead-form select, .lead-form textarea {
  font: inherit;
  padding: .6rem .7rem;
  border: 1px solid #ccc;
  border-radius: var(--radius);
  background: #fff;
  width: 100%;
}
.lead-form textarea { resize: vertical; }
.lead-form button {
  font: inherit;
  font-weight: 600;
  padding: .75rem 1.1rem;
  border: 0;
  border-radius: var(--radius);
  color: white;
  background: var(--accent);
  cursor: pointer;
}
.lead-form button:disabled { opacity: .6; cursor: progress; }
.privacy {
  font-size: .85rem;
  color: var(--muted);
  margin: .5rem 0 0;
}
#form-status { min-height: 1.25em; font-weight: 600; }
#form-status.ok { color: var(--accent); }
#form-status.err { color: #b91c1c; }

.deep-dive { background: #fff; border-radius: var(--radius); margin-top: 1rem; }
.deep-dive section + section { margin-top: 1rem; }

footer { color: var(--muted); font-size: .9rem; }
footer ul { padding-left: 1.25rem; }