:root {
  --green: #1f9d8b;
  --green-dark: #157f70;
  --ink: #1a2b2a;
  --muted: #5a6b6a;
  --bg: #f6faf9;
  --border: #e2ece9;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 22px; }
header.top {
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  color: #fff;
  padding: 28px 0 26px;
}
header.top .wrap { display: flex; align-items: center; gap: 14px; }
.logo {
  width: 46px; height: 46px; border-radius: 13px;
  background: rgba(255,255,255,0.18);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 26px;
}
.brand { font-size: 20px; font-weight: 800; letter-spacing: .2px; }
.brand small { display: block; font-size: 12.5px; font-weight: 500; opacity: .9; }
main { padding: 34px 0 60px; }
h1 { font-size: 28px; margin: 0 0 4px; }
.updated { color: var(--muted); font-size: 13.5px; margin: 0 0 22px; }
.intro {
  background: #fff; border: 1px solid var(--border); border-radius: 14px;
  padding: 16px 18px; color: var(--muted); font-size: 15px; margin-bottom: 26px;
}
h2 { font-size: 17px; margin: 26px 0 6px; color: var(--ink); }
p { margin: 0 0 12px; color: #33403f; font-size: 15px; }
a { color: var(--green-dark); }
.disclaimer {
  background: #fff7ed; border: 1px solid #fcd9a8; border-radius: 12px;
  padding: 14px 16px; font-size: 14.5px; color: #7a4a12; margin: 22px 0;
}
.cards { display: grid; gap: 14px; grid-template-columns: 1fr 1fr; margin: 26px 0; }
.card {
  display: block; background: #fff; border: 1px solid var(--border);
  border-radius: 16px; padding: 20px; text-decoration: none; color: var(--ink);
  transition: transform .08s ease, box-shadow .12s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(20,127,112,.10); }
.card .t { font-weight: 700; font-size: 16px; margin-bottom: 4px; }
.card .d { color: var(--muted); font-size: 13.5px; }
footer {
  border-top: 1px solid var(--border); padding: 22px 0 40px;
  color: var(--muted); font-size: 13px;
}
footer .wrap { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { text-decoration: underline; }
@media (max-width: 560px) { .cards { grid-template-columns: 1fr; } h1 { font-size: 24px; } }

/* ── Landing page ───────────────────────────────────────────── */
.nav { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.85);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.nav .wrap { display: flex; align-items: center; gap: 18px; padding: 12px 22px; }
.nav .logo { width: 34px; height: 34px; border-radius: 10px; font-size: 19px; background: var(--green); color:#fff; }
.nav .name { font-weight: 800; font-size: 17px; }
.nav .links { margin-left: auto; display: flex; gap: 20px; align-items: center; }
.nav .links a { color: var(--ink); text-decoration: none; font-size: 14.5px; font-weight: 600; }
.nav .cta { background: var(--green); color: #fff !important; padding: 9px 16px; border-radius: 999px; }
@media (max-width:620px){ .nav .links a.hide-sm { display:none; } }

.hero { background: linear-gradient(160deg,#eafaf6 0%, #f6faf9 60%); padding: 56px 0 30px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 36px; align-items: center; }
.eyebrow { display:inline-block; background:#d9f3ec; color:var(--green-dark); font-weight:700;
  font-size:12.5px; padding:6px 12px; border-radius:999px; letter-spacing:.3px; }
.hero h1 { font-size: 40px; line-height: 1.1; margin: 16px 0 12px; letter-spacing:-.5px; }
.hero h1 span { color: var(--green-dark); }
.hero p.sub { font-size: 17px; color: var(--muted); margin: 0 0 22px; }
.btns { display:flex; gap:12px; flex-wrap:wrap; }
.btn { display:inline-block; text-decoration:none; font-weight:700; font-size:15px; border-radius:999px; padding:12px 22px; }
.btn.primary { background: var(--green); color:#fff; }
.btn.ghost { background:#fff; color: var(--ink); border:1px solid var(--border); }
.hero .note { margin-top:14px; font-size:13px; color:var(--muted); }
@media (max-width:820px){ .hero .wrap{ grid-template-columns:1fr; } .hero h1{ font-size:32px; } }

/* phone mockup */
.phone { width: 300px; max-width: 100%; margin: 0 auto; background:#0e1714; border-radius:38px;
  padding:12px; box-shadow:0 24px 60px rgba(16,60,52,.22); }
.phone .screen { background:#f3f7f6; border-radius:28px; overflow:hidden; }
.phone .bar { background: linear-gradient(135deg,var(--green),var(--green-dark)); color:#fff;
  padding:14px 16px; display:flex; align-items:center; gap:9px; font-weight:700; font-size:14px; }
.phone .bar .dot{ width:24px;height:24px;border-radius:8px;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-weight:800;}
.phone .body { padding:12px; }
.bubble.user { background:var(--green); color:#fff; padding:9px 12px; border-radius:14px 14px 4px 14px;
  font-size:12.5px; margin:2px 0 10px auto; max-width:80%; }
.bubble.ai { font-size:12px; color:#23302e; line-height:1.5; }
.bubble.ai b { color:#0e2b25; }
.cite { display:inline-block; background:#e7f4f0; color:var(--green-dark); font-size:10px; font-weight:700;
  padding:2px 7px; border-radius:6px; margin-top:6px; }
.diagram { margin-top:10px; border:1px solid var(--border); border-radius:12px; overflow:hidden; background:#fff; }
.diagram img { width:100%; display:block; }
.diagram .cap { font-size:9.5px; color:var(--muted); padding:5px 8px; }

section.block { padding: 50px 0; }
section.block.alt { background:#fff; border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.center { text-align:center; }
h2.sec { font-size:27px; margin:0 0 8px; letter-spacing:-.3px; }
p.lead { color:var(--muted); font-size:16px; max-width:620px; margin:0 auto 30px; }
.grid3 { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
@media (max-width:820px){ .grid3{ grid-template-columns:1fr; } }
.feat { background:#fff; border:1px solid var(--border); border-radius:16px; padding:22px; }
section.block.alt .feat { background: var(--bg); }
.feat .ic { width:46px; height:46px; border-radius:12px; background:#e7f4f0; display:flex; align-items:center; justify-content:center; margin-bottom:12px; }
.feat h3 { font-size:16.5px; margin:0 0 6px; }
.feat p { font-size:14px; color:var(--muted); margin:0; }
.roles { display:flex; flex-wrap:wrap; gap:10px; justify-content:center; }
.role { background:#fff; border:1px solid var(--border); border-radius:999px; padding:9px 16px; font-size:14px; font-weight:600; }
.steps { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; counter-reset:s; }
@media (max-width:820px){ .steps{ grid-template-columns:1fr; } }
.step { background:#fff; border:1px solid var(--border); border-radius:16px; padding:22px; }
.step .n { width:30px;height:30px;border-radius:9px;background:var(--green);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:10px; }
.step h3{ font-size:15.5px; margin:0 0 5px; } .step p{ font-size:13.5px; color:var(--muted); margin:0; }
.safety { background:#fff7ed; border:1px solid #fcd9a8; border-radius:14px; padding:18px 20px; color:#7a4a12; font-size:14.5px; }

/* FAQ accordion */
.faq { max-width: 720px; margin: 0 auto; }
.faq details { background:#fff; border:1px solid var(--border); border-radius:12px; padding:0 16px; margin-bottom:10px; }
.faq summary { cursor:pointer; font-weight:700; font-size:15.5px; padding:15px 0; list-style:none; position:relative; padding-right:28px; }
.faq summary::-webkit-details-marker { display:none; }
.faq summary::after { content:"+"; position:absolute; right:2px; top:13px; font-size:20px; color:var(--green); font-weight:400; }
.faq details[open] summary::after { content:"−"; }
.faq details p { margin:0 0 16px; color:var(--muted); font-size:14.5px; }