:root {
  --ink: #16251d;
  --muted: #5d6b63;
  --paper: #f7f8f4;
  --surface: #ffffff;
  --line: #dce4dc;
  --green: #176a46;
  --green-dark: #0e4d32;
  --mint: #dff3e6;
  --amber: #bd7400;
  --blue: #386aa3;
  --shadow: 0 24px 70px rgba(28, 55, 40, .09);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.55 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
button, input, textarea, select { font: inherit; }
a { color: inherit; }
.topbar { height: 76px; display: flex; align-items: center; justify-content: space-between; max-width: 1180px; margin: auto; padding: 0 28px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-size: 18px; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; color: white; background: var(--green); font-weight: 800; }
nav { display: flex; gap: 28px; }
nav a { text-decoration: none; color: var(--muted); font-weight: 650; }
main, footer { overflow: hidden; }
.hero { max-width: 1180px; min-height: 560px; margin: auto; padding: 90px 28px 80px; display: grid; grid-template-columns: 1.45fr .75fr; align-items: center; gap: 80px; }
.eyebrow { margin: 0 0 16px; color: var(--green); font-size: 12px; font-weight: 850; letter-spacing: .15em; }
h1 { max-width: 800px; margin: 0; font-size: clamp(48px, 6.7vw, 82px); line-height: .98; letter-spacing: -.055em; }
.lede { max-width: 720px; margin: 28px 0 34px; color: var(--muted); font-size: 20px; }
.button { border: 0; border-radius: 12px; padding: 13px 19px; text-decoration: none; font-weight: 750; cursor: pointer; transition: transform .15s, background .15s; }
.button:hover { transform: translateY(-1px); }
.button.primary { color: white; background: var(--green); }
.button.primary:hover { background: var(--green-dark); }
.button.secondary { color: var(--green-dark); background: var(--mint); }
.promise-card { padding: 32px; border: 1px solid var(--line); border-radius: 24px; background: var(--surface); box-shadow: var(--shadow); }
.status-dot { display: block; width: 12px; height: 12px; margin-bottom: 26px; border-radius: 50%; background: #36a66b; box-shadow: 0 0 0 8px var(--mint); }
.card-kicker { margin: 0 0 8px; color: var(--green); font-size: 12px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.promise-card strong { display: block; font-size: 25px; line-height: 1.25; }
.promise-card p:last-child { color: var(--muted); margin-bottom: 0; }
.workflow { padding: 100px 28px; background: #eef3ee; }
.section-heading { max-width: 1180px; margin: 0 auto 44px; }
h2 { margin: 0; font-size: clamp(35px, 4vw, 56px); line-height: 1.05; letter-spacing: -.04em; }
.section-heading > p:last-child { max-width: 680px; color: var(--muted); font-size: 18px; }
.stepper { max-width: 1180px; margin: 0 auto 18px; display: flex; gap: 8px; }
.step { display: flex; align-items: center; gap: 9px; padding: 11px 14px; border: 0; border-radius: 999px; color: var(--muted); background: transparent; font-weight: 750; cursor: pointer; }
.step span { display: grid; place-items: center; width: 25px; height: 25px; border-radius: 50%; background: #dce6dd; }
.step.active { color: var(--green-dark); background: var(--surface); }
.step.active span { color: white; background: var(--green); }
.workspace { max-width: 1180px; margin: auto; display: grid; grid-template-columns: 1.35fr .65fr; gap: 20px; align-items: start; }
.panel { border: 1px solid var(--line); border-radius: 22px; background: var(--surface); box-shadow: var(--shadow); }
.form-panel { padding: 34px; }
.form-step { display: none; min-height: 430px; }
.form-step.active { display: block; }
h3 { margin: 0 0 24px; font-size: 24px; letter-spacing: -.02em; }
label, legend { display: block; margin: 18px 0 7px; font-weight: 730; }
label span { color: var(--muted); font-weight: 500; }
input[type="text"], input:not([type]), textarea, select { width: 100%; border: 1px solid #cbd7ce; border-radius: 11px; padding: 12px 13px; color: var(--ink); background: #fbfcfa; }
input:focus, textarea:focus, select:focus { outline: 3px solid rgba(23, 106, 70, .15); border-color: var(--green); }
textarea { resize: vertical; }
fieldset { margin: 22px 0 0; padding: 0; border: 0; }
.choice-row { display: flex; gap: 12px; }
.choice-row label { flex: 1; margin: 0; padding: 12px; border: 1px solid var(--line); border-radius: 10px; }
.checkbox { display: flex; gap: 10px; align-items: flex-start; padding: 13px; border-radius: 10px; background: #fff8e8; font-weight: 600; }
.checkbox input { margin-top: 5px; }
.form-actions { display: flex; justify-content: space-between; border-top: 1px solid var(--line); padding-top: 22px; }
.form-actions button:disabled { opacity: .45; cursor: not-allowed; }
.evidence-panel { position: sticky; top: 20px; padding: 30px; }
.evidence-panel > p:nth-of-type(2) { color: var(--muted); }
.signal-list { display: grid; gap: 18px; margin-top: 30px; }
.signal-list div { display: grid; grid-template-columns: 12px 1fr; column-gap: 10px; }
.signal { grid-row: 1 / span 2; width: 4px; height: 38px; border-radius: 3px; }
.signal.observed { background: var(--green); }
.signal.estimated { background: var(--amber); }
.signal.reviewed { background: var(--blue); }
.signal-list small { color: var(--muted); }
.brief { display: grid; gap: 13px; margin-bottom: 18px; }
.brief-row { padding: 15px; border-left: 4px solid var(--line); border-radius: 6px 10px 10px 6px; background: #f6f8f5; }
.brief-row strong { display: block; margin-bottom: 4px; color: var(--green-dark); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.text-button { margin-left: 12px; border: 0; color: var(--muted); background: transparent; text-decoration: underline; cursor: pointer; }
.safety { max-width: 1180px; margin: auto; padding: 110px 28px; }
.principles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.principles article { padding: 26px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }
.principles span { color: var(--green); font-weight: 850; }
.principles h3 { margin: 25px 0 10px; font-size: 21px; }
.principles p { margin: 0; color: var(--muted); }
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; padding: 100px max(28px, calc((100vw - 1124px)/2)); color: white; background: var(--green-dark); }
.about .eyebrow { color: #93dfb3; }
.about > p { font-size: 19px; color: #d5e7dc; }
footer { padding: 42px 28px; text-align: center; color: var(--muted); }
footer p { margin: 7px 0 0; }
@media (max-width: 800px) {
  nav { display: none; }
  .hero, .workspace, .about { grid-template-columns: 1fr; }
  .hero { padding-top: 55px; gap: 40px; }
  .workflow, .safety { padding-top: 70px; padding-bottom: 70px; }
  .step { font-size: 0; }
  .step span { font-size: 14px; }
  .principles { grid-template-columns: 1fr 1fr; }
  .evidence-panel { position: static; }
}
@media (max-width: 520px) {
  .principles { grid-template-columns: 1fr; }
  .form-panel { padding: 22px; }
  .choice-row { flex-direction: column; }
}