/* Plusline — system fonts only (CSP: no third-party assets). */
:root {
  --bg: #fbfbf8; --panel: #ffffff; --ink: #121412; --sub: #5d625d; --line: #e4e6e1;
  --brand: #0f7a4a; --brand-ink: #ffffff; --brand-soft: #e6f4ec; --pos: #0f7a4a; --err: #b3261e;
  --radius: 14px; --shadow: 0 1px 2px rgb(0 0 0 / .04), 0 8px 28px rgb(0 0 0 / .06);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f0e; --panel: #151816; --ink: #eef0ec; --sub: #9aa19b; --line: #262a27;
    --brand: #35c47f; --brand-ink: #06150d; --brand-soft: #12281c; --pos: #4fd792; --err: #f28b82;
    --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 8px 28px rgb(0 0 0 / .35);
  }
}
* { box-sizing: border-box }
html { scroll-behavior: smooth }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.6 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 .5em }
h1 { font-size: clamp(2.2rem, 5.5vw, 3.6rem); font-weight: 750 }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 700 }
h3 { font-size: 1.05rem; font-weight: 650 }
p { margin: 0 0 1em }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px }
.center { text-align: center }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap }

/* nav */
.nav { display: flex; align-items: center; justify-content: space-between; padding-top: 20px; padding-bottom: 20px }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 750; font-size: 1.15rem; text-decoration: none; letter-spacing: -0.01em }
.mark { width: 28px; height: 28px }
.mark rect { fill: var(--brand) }
.mark path { stroke: var(--brand-ink); stroke-width: 3.2; stroke-linecap: round }
.nav-cta { font-size: .95rem; font-weight: 600; text-decoration: none; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px }
.nav-cta:hover { border-color: var(--brand) }

/* hero */
.hero { display: grid; gap: 48px; align-items: center; padding-top: 40px; padding-bottom: 72px }
@media (min-width: 900px) { .hero { grid-template-columns: 1.15fr .85fr; padding-top: 64px } }
.eyebrow { color: var(--brand); font-weight: 650; font-size: .9rem; letter-spacing: .02em; text-transform: uppercase; margin-bottom: 14px }
.lede { font-size: 1.15rem; color: var(--sub); max-width: 40em }
.lede strong { color: var(--ink); font-weight: 600 }

/* form */
.join { display: grid; gap: 10px; margin-top: 28px; max-width: 520px }
@media (min-width: 560px) { .join { grid-template-columns: 1fr 1fr } .join button, .join .fine, .join .error { grid-column: 1 / -1 } }
.join input, .join select, .join button {
  font: inherit; font-size: 1rem; padding: 13px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--panel); color: var(--ink); width: 100%; min-width: 0;
}
.join input:focus, .join select:focus { outline: 2px solid var(--brand); outline-offset: 1px; border-color: transparent }
.join button, .button {
  background: var(--brand); color: var(--brand-ink); border: 0; font-weight: 700; cursor: pointer;
  display: inline-block; text-decoration: none; text-align: center; padding: 14px 22px; border-radius: 10px;
}
.join button:hover, .button:hover { filter: brightness(1.07) }
.fine { font-size: .88rem; color: var(--sub); margin: 4px 0 0 }
.fine strong { color: var(--ink) }
.error { color: var(--err); font-weight: 600; margin: 0 }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden }

/* example alert */
.alert {
  position: relative; margin: 0; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
}
.alert-tag { position: absolute; top: -11px; left: 18px; background: var(--bg); color: var(--sub); font-size: .75rem; font-weight: 600; padding: 2px 10px; border: 1px solid var(--line); border-radius: 999px }
.alert-head { display: flex; align-items: center; gap: 8px; color: var(--sub); font-size: .88rem }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--pos); box-shadow: 0 0 0 4px var(--brand-soft) }
.alert-title { font-size: 1.3rem; font-weight: 700; margin: 10px 0 16px; letter-spacing: -0.01em }
.pos { color: var(--pos) }
.alert-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0 0 16px }
.alert-grid div { background: var(--bg); border-radius: 10px; padding: 10px 12px }
.alert-grid dt { font-size: .78rem; color: var(--sub) }
.alert-grid dd { margin: 0; font-size: 1.15rem; font-weight: 650; font-variant-numeric: tabular-nums }
.alert-foot { font-size: .85rem; color: var(--pos); margin: 0; font-weight: 600 }

/* sections */
.band { background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 64px 0 }
.two { display: grid; gap: 32px }
@media (min-width: 800px) { .two { grid-template-columns: 1fr 1fr; gap: 56px } }
.two p { color: var(--sub) }
.features, .steps, .faq { padding-top: 72px }
.grid4 { display: grid; gap: 16px; margin-top: 28px }
@media (min-width: 640px) { .grid4 { grid-template-columns: 1fr 1fr } }
@media (min-width: 1000px) { .grid4 { grid-template-columns: repeat(4, 1fr) } }
.grid4 article { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px }
.grid4 article p { color: var(--sub); margin: 0; font-size: .95rem }
.steps ol { list-style: none; counter-reset: step; padding: 0; margin: 28px auto 0; max-width: 720px; display: grid; gap: 14px }
.steps li { counter-increment: step; position: relative; padding: 16px 18px 16px 64px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); color: var(--sub) }
.steps li strong { color: var(--ink) }
.steps li::before { content: counter(step); position: absolute; left: 18px; top: 14px; width: 30px; height: 30px; border-radius: 50%; background: var(--brand-soft); color: var(--brand); font-weight: 750; display: grid; place-items: center }
.faq details { max-width: 720px; margin: 0 auto 10px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 18px }
.faq h2 { margin-bottom: 28px }
.faq summary { cursor: pointer; font-weight: 650; padding: 12px 0 }
.faq details p { color: var(--sub) }
.final { text-align: center; padding-top: 88px; padding-bottom: 88px }

/* simple pages */
.message { max-width: 720px; padding-top: 64px; padding-bottom: 96px }
.prose { max-width: 720px; padding-top: 32px; padding-bottom: 64px }
.prose h2 { font-size: 1.2rem; margin-top: 1.6em }
.prose p { color: var(--sub) }

/* footer */
.foot { border-top: 1px solid var(--line); padding-top: 24px; padding-bottom: 40px; font-size: .85rem; color: var(--sub) }
.foot p { margin: 0 0 8px; max-width: 60em }