:root {
  --bg: #f3f3f0; --fg: #1f2320; --muted: #5d645c; --rule: #d3d5cf; --card: #ffffff;
  --accent: #4f6f2a; --accent-fg: #ffffff; --info: #3b6687; --risk: #a2412f;
  --sans: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171917; --fg: #e4e6e0; --muted: #9da397; --rule: #343833; --card: #1e211e;
    --accent: #a3c26a; --accent-fg: #171917; --info: #8ab4d4; --risk: #e48a76; color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.55 var(--sans);
  padding: 0 16px max(40px, env(safe-area-inset-bottom));
}
h1, h2, h3, p { margin: 0; }
a { color: var(--info); text-underline-offset: 2px; }
:focus-visible { outline: 2px solid var(--info); outline-offset: 2px; }

.hero, main, footer { max-width: 1040px; margin: 0 auto; }
.hero { padding: max(56px, env(safe-area-inset-top)) 0 40px; display: flex; flex-direction: column; gap: 16px; border-bottom: 1px solid var(--rule); }
.kicker { font: 500 12px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
h1 { font-size: clamp(30px, 6vw, 48px); line-height: 1.1; font-weight: 700; max-width: 18ch; text-wrap: balance; letter-spacing: -.01em; }
.lead { font-size: 18px; color: var(--muted); max-width: 58ch; }
.jump { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.jump a { font-size: 14px; color: var(--fg); text-decoration: none; padding: 6px 12px; border: 1px solid var(--rule); border-radius: 999px; background: var(--card); }
.jump a:hover { border-color: var(--fg); }

main { display: flex; flex-direction: column; gap: 48px; padding-top: 40px; }
section { display: flex; flex-direction: column; gap: 18px; scroll-margin-top: 24px; }
.group-head { display: flex; flex-direction: column; gap: 4px; }
h2 { font-size: 22px; font-weight: 600; }
.group-head p { color: var(--muted); }

.grid { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }
.card { display: flex; gap: 16px; padding: 18px; background: var(--card); border: 1px solid var(--rule); border-radius: 14px; }
.icon { width: 56px; height: 56px; border-radius: 13px; flex: none; }
.body { display: flex; flex-direction: column; gap: 8px; min-width: 0; flex: 1; }
.title { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
h3 { font-size: 17px; font-weight: 600; }
.stage { font: 500 11px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); border: 1px solid var(--rule); border-radius: 4px; padding: 1px 6px; }
.stage.alpha { color: var(--accent); border-color: currentColor; }
.body p { color: var(--muted); font-size: 15px; }
.actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: auto; padding-top: 4px; }

.btn { gap: 6px;
  display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 16px;
  font: 600 14px var(--sans); color: var(--fg); background: transparent; border: 1px solid var(--fg); border-radius: 8px;
  text-decoration: none; cursor: pointer;
}
.btn:hover { background: var(--fg); color: var(--bg); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.btn.primary:hover { filter: brightness(1.1); }
.quiet { font-size: 14px; color: var(--muted); }
.note { font-size: 14px; color: var(--muted); }

.form, .done { display: flex; flex-direction: column; gap: 16px; max-width: 520px; padding: 22px; background: var(--card); border: 1px solid var(--rule); border-radius: 14px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 500; }
input, select, textarea {
  font: 16px var(--sans); color: var(--fg); background: var(--bg); border: 1px solid var(--rule); border-radius: 8px; padding: 10px 12px; width: 100%;
}
input:focus, select:focus, textarea:focus { border-color: var(--info); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--info) 25%, transparent); }
.hint, .opt { font-weight: 400; color: var(--muted); font-size: 13px; }
.hp { position: absolute; left: -9999px; }
.form .btn { align-self: flex-start; min-height: 44px; padding: 0 22px; }
.error { color: var(--risk); font-size: 14px; }
.done h3 { color: var(--accent); }

footer { padding: 48px 0 0; margin-top: 48px; border-top: 1px solid var(--rule); color: var(--muted); font-size: 13px; }