:root{
  --ink:#16201f; --teal:#01696f; --teal-d:#01575c; --accent:#0a8f97;
  --line:#e2e7e6; --bg:#f7f9f9; --muted:#5c6b69; --ok:#1b7f3a; --no:#c62828; --amber:#8a5a00;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.5}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.narrow{max-width:520px;margin:0 auto;padding:0 20px}

/* Nav */
.nav{position:sticky;top:0;z-index:10;background:rgba(247,249,249,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:62px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .dot{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--teal),var(--accent));display:inline-block}
.nav-links{display:flex;align-items:center;gap:8px}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font:inherit;font-weight:600;padding:10px 18px;border-radius:10px;border:1px solid transparent;background:var(--teal);color:#fff;cursor:pointer;transition:.15s}
.btn:hover{background:var(--teal-d);text-decoration:none}
.btn.ghost{background:transparent;color:var(--teal);border-color:var(--line)}
.btn.ghost:hover{background:#eef4f4}
.btn.block{display:flex;width:100%;justify-content:center}
.btn:disabled{opacity:.5;cursor:default}
.btn.sm{padding:7px 12px;font-size:13px;border-radius:8px}

/* Hero */
.hero{padding:64px 0 40px;text-align:center}
.hero h1{font-size:42px;line-height:1.1;margin:0 0 16px;letter-spacing:-.02em}
.hero p.lead{font-size:18px;color:var(--muted);max-width:640px;margin:0 auto 28px}
.pill{display:inline-block;font-size:12px;font-weight:700;color:var(--teal);background:#e3efef;padding:5px 12px;border-radius:20px;letter-spacing:.03em;text-transform:uppercase;margin-bottom:18px}
.cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Cards */
.cards{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:36px 0}
@media(max-width:720px){.cards{grid-template-columns:1fr}.hero h1{font-size:32px}}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px}
.card h3{margin:0 0 6px;font-size:19px}
.card .ic{font-size:26px;margin-bottom:10px}
.card p{color:var(--muted);margin:0 0 16px}
.muted{color:var(--muted)}
.steps{display:grid;gap:14px;margin:28px 0}
.step{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.step .n{flex:none;width:28px;height:28px;border-radius:50%;background:var(--teal);color:#fff;display:grid;place-items:center;font-weight:700;font-size:14px}
.step b{display:block}

/* Forms */
.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;margin:32px 0}
.panel h1{font-size:24px;margin:0 0 4px}
.panel .sub{color:var(--muted);margin:0 0 22px;font-size:14px}
label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin:14px 0 6px}
input,select,textarea{width:100%;font:inherit;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:#fff}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(10,143,151,.12)}
textarea{min-height:80px;resize:vertical;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px}
.row{display:flex;gap:12px;flex-wrap:wrap}.row>div{flex:1;min-width:180px}
.hint{font-size:12px;color:var(--muted);margin-top:6px}
.seg-choice{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:8px}
.seg-choice label{border:1px solid var(--line);border-radius:12px;padding:14px;margin:0;cursor:pointer;display:block;font-weight:600}
.seg-choice input{width:auto;margin-right:8px}
.seg-choice label.on{border-color:var(--teal);background:#eef7f7}
.note{font-size:13px;color:var(--muted);margin-top:12px}
.err{color:var(--no);font-size:14px}
.ok-box{background:#e7f4ec;border:1px solid #bfe3cd;border-radius:12px;padding:14px 16px;margin:14px 0}
.warn-box{background:#fdf3e2;border:1px solid #f0dcae;border-radius:12px;padding:14px 16px;margin:14px 0;color:var(--amber);font-size:14px}
code,.mono{font-family:ui-monospace,Menlo,Consolas,monospace}
.token{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:14px;background:#0f1b1a;color:#8fe;padding:12px 14px;border-radius:10px;word-break:break-all;display:flex;justify-content:space-between;gap:10px;align-items:center}
.footer{color:var(--muted);font-size:13px;text-align:center;padding:40px 0}
.kv{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px solid var(--line);font-size:14px}
.kv:last-child{border-bottom:none}.kv .k{color:var(--muted)}
.divider{height:1px;background:var(--line);margin:22px 0}
.badge{display:inline-block;font-size:11px;font-weight:700;padding:3px 9px;border-radius:20px;text-transform:uppercase;letter-spacing:.03em}
.badge.prod{background:#e3efef;color:var(--teal)}.badge.ind{background:#efeaf7;color:#5b3c9e}