:root {
  --bg: #f7f8f6;
  --surface: #ffffff;
  --surface-2: #eef3ef;
  --text: #17201b;
  --muted: #5b6862;
  --line: #dde5df;
  --accent: #1f8a5b;
  --accent-strong: #146b45;
  --accent-soft: #e2f1e9;
  --on-accent: #ffffff;
  --code-bg: #f2f5f3;
  --shadow: 0 1px 2px rgba(16, 40, 28, .05), 0 6px 24px rgba(16, 40, 28, .06);
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1412;
    --surface: #161d1a;
    --surface-2: #1c2622;
    --text: #e8eeea;
    --muted: #9aa8a1;
    --line: #2a3530;
    --accent: #3fbf86;
    --accent-strong: #5dd39d;
    --accent-soft: #1b3328;
    --on-accent: #08130e;
    --code-bg: #121916;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 24px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "Inter", -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow-x: hidden;
}
a { color: var(--accent-strong); }
img, svg { max-width: 100%; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* header */
.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); text-decoration: none; letter-spacing: -.01em; }
.brand .mark { width: 28px; height: 28px; border-radius: 8px; background: var(--accent); display: grid; place-items: center; color: var(--on-accent); font-size: 14px; font-weight: 800; }
.top nav { display: flex; gap: 22px; }
.top nav a { color: var(--muted); text-decoration: none; font-size: 15px; font-weight: 500; }
.top nav a:hover { color: var(--text); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; border-radius: 10px;
  font-weight: 600; font-size: 15px; text-decoration: none;
  border: 1px solid transparent; cursor: pointer; transition: transform .15s, background .15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-strong); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); }
.btn svg { width: 18px; height: 18px; flex: none; }

/* hero */
.hero { padding: 72px 0 48px; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--accent-strong); background: var(--accent-soft); padding: 5px 10px; border-radius: 999px; }
.hero h1 { font-size: clamp(34px, 5.4vw, 56px); line-height: 1.08; letter-spacing: -.03em; margin: 18px 0 16px; max-width: 14em; }
.hero p.lead { font-size: 19px; color: var(--muted); max-width: 38em; margin: 0 0 28px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }

.hero-grid { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
.qr-card { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 16px; border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); text-decoration: none; color: #17201b; font-size: 14px; font-weight: 600; }
.qr-card img { width: 200px; height: 200px; display: block; }

section { padding: 48px 0; }
.section-head { margin-bottom: 26px; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 34px); letter-spacing: -.02em; line-height: 1.15; margin: 0 0 8px; }
.section-head p { color: var(--muted); margin: 0; max-width: 40em; }

/* download cards */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow); display: flex; flex-direction: column; min-width: 0;
}
.card .icon { width: 42px; height: 42px; border-radius: 10px; background: var(--accent-soft); color: var(--accent-strong); display: grid; place-items: center; margin-bottom: 14px; }
.card .icon svg { width: 22px; height: 22px; }
.card h3 { margin: 0 0 6px; font-size: 18px; letter-spacing: -.01em; }
.card p { margin: 0 0 18px; color: var(--muted); font-size: 15px; flex: 1; }
.card .meta { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.card .links { display: flex; flex-wrap: wrap; gap: 8px; }
.card .btn { padding: 9px 14px; font-size: 14px; }

/* steps */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; counter-reset: s; }
.step { padding: 20px 22px; border-radius: var(--radius); background: var(--surface-2); border: 1px solid var(--line); }
.step::before { counter-increment: s; content: counter(s); display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 14px; margin-bottom: 10px; }
.step h3 { margin: 0 0 4px; font-size: 16px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

/* services */
.services { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.svc { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.svc .card { box-shadow: none; background: var(--bg); }
.svc .card ul { margin: 0 0 18px; padding-left: 18px; color: var(--muted); font-size: 15px; flex: 1; }
.svc .card li { margin: 3px 0; }

/* about */
.about { display: grid; grid-template-columns: 160px 1fr; gap: 28px; align-items: start; }
.avatar { width: 120px; height: 120px; border-radius: 24px; background: linear-gradient(135deg, var(--accent), var(--accent-strong)); color: var(--on-accent); display: grid; place-items: center; font-size: 40px; font-weight: 800; letter-spacing: -.02em; }
.avatar-photo { width: 160px; height: 160px; border-radius: 50%; display: block; }
.facts { display: flex; gap: 28px; margin: 4px 0 14px; }
.facts div { display: flex; flex-direction: column; }
.facts strong { font-size: 32px; line-height: 1.1; color: var(--accent-strong); letter-spacing: -.02em; }
.facts span { font-size: 14px; color: var(--muted); }
.about h2 { margin: 0 0 10px; font-size: 28px; letter-spacing: -.02em; }
.about p { margin: 0 0 12px; color: var(--muted); max-width: 42em; }

/* cta band */
.cta { background: var(--accent); color: var(--on-accent); border-radius: 20px; padding: 40px 36px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; }
.cta h2 { margin: 0 0 6px; font-size: clamp(24px, 3vw, 30px); letter-spacing: -.02em; }
.cta p { margin: 0; opacity: .9; max-width: 34em; }
.cta .btn { background: var(--on-accent); color: var(--accent-strong); }
.cta .btn:hover { opacity: .92; }

footer { padding: 40px 0 56px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }

/* prompt page */
.ptools { position: sticky; top: 60px; z-index: 5; background: var(--bg); padding: 14px 0; border-bottom: 1px solid var(--line); }
.search { width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: inherit; }
.search:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.pnav { display: flex; gap: 8px; overflow-x: auto; padding-top: 10px; scrollbar-width: thin; }
.pnav a { flex: none; font-size: 13px; padding: 5px 11px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); color: var(--muted); text-decoration: none; }
.pnav a:hover { color: var(--text); border-color: var(--accent); }
.pcat { padding: 30px 0 4px; scroll-margin-top: 150px; }
.pcat h2 { font-size: 22px; margin: 0 0 14px; letter-spacing: -.01em; }
.prompt { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; margin-bottom: 14px; overflow: hidden; scroll-margin-top: 150px; }
.prompt header { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.prompt h3 { margin: 0; font-size: 16px; flex: 1; min-width: 0; }
.pid { font: 600 12px/1 ui-monospace, Menlo, monospace; background: var(--accent-soft); color: var(--accent-strong); padding: 5px 7px; border-radius: 6px; flex: none; }
.copy { flex: none; font: 600 13px/1 inherit; font-family: inherit; padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--text); cursor: pointer; }
.copy:hover { border-color: var(--accent); }
.copy.done { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.prompt pre { margin: 0; padding: 14px 16px; background: var(--code-bg); font: 13.5px/1.55 ui-monospace, Menlo, monospace; white-space: pre-wrap; word-break: break-word; }
.empty { display: none; color: var(--muted); padding: 30px 0; }

@media (max-width: 720px) {
  .top nav { gap: 14px; }
  .top nav a.hide-m { display: none; }
  .hero { padding: 44px 0 28px; }
  .hero-grid { grid-template-columns: 1fr; }
  .qr-card { display: none; }
  .about { grid-template-columns: 1fr; }
  .avatar { width: 84px; height: 84px; font-size: 28px; border-radius: 18px; }
  .avatar-photo { width: 110px; height: 110px; }
  .cta { padding: 28px 22px; }
  .wrap { padding: 0 16px; }
  .prompt header { flex-wrap: wrap; }
}
@media print {
  .top, .ptools, .copy, .cta, footer { display: none; }
}