/* YiCircle landing — shared styles. No external dependencies (system fonts) for reliable, build-free static hosting. */

:root {
  --green: #0f9d63;
  --green-dark: #0b7a4d;
  --green-soft: #e8f7ef;
  --ink: #14241c;
  --body: #3d4a44;
  --muted: #6b7a73;
  --line: #e4ebe7;
  --bg: #ffffff;
  --bg-soft: #f6faf8;
  --max: 1080px;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 36, 28, .04), 0 8px 24px rgba(20, 36, 28, .06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--body);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { color: var(--ink); line-height: 1.25; font-weight: 700; }
h1 { font-size: clamp(2rem, 4.4vw, 3.2rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -.01em; }
h3 { font-size: 1.18rem; }
p { margin: 0 0 1rem; }
a { color: var(--green-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.center { text-align: center; }
.muted { color: var(--muted); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 66px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.2rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; }
.brand .yi { color: var(--ink); }
.brand .circle { color: var(--green); }
.nav { display: flex; align-items: center; gap: 26px; }
.nav a { color: var(--body); font-size: .96rem; font-weight: 500; }
.nav a:hover { color: var(--green-dark); text-decoration: none; }

.btn {
  display: inline-block; background: var(--green); color: #fff;
  padding: 12px 22px; border-radius: 999px; font-weight: 600; font-size: .96rem;
  border: none; cursor: pointer; transition: background .15s ease, transform .15s ease;
}
.btn:hover { background: var(--green-dark); text-decoration: none; color: #fff; transform: translateY(-1px); }
.btn-ghost {
  background: transparent; color: var(--green-dark);
  border: 1px solid var(--line);
}
.btn-ghost:hover { background: var(--green-soft); color: var(--green-dark); }

/* Hero */
.hero {
  background:
    radial-gradient(900px 420px at 80% -10%, var(--green-soft), transparent 60%),
    radial-gradient(700px 360px at 0% 10%, #eef6ff, transparent 55%);
  padding: 84px 0 72px;
}
.hero .eyebrow {
  display: inline-block; background: var(--green-soft); color: var(--green-dark);
  font-weight: 600; font-size: .82rem; letter-spacing: .04em; text-transform: uppercase;
  padding: 6px 14px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { max-width: 14ch; }
.hero p.lede { font-size: 1.22rem; color: var(--body); max-width: 56ch; margin: 20px 0 32px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* App store badges (placeholder — coming soon) */
.store-badges { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }
.store-badge {
  display: flex; align-items: center; gap: 11px;
  background: var(--ink); color: #fff; border-radius: 13px;
  padding: 10px 18px; cursor: default; user-select: none;
}
.store-badge svg { width: 22px; height: 22px; flex: none; }
.store-badge .sb-text { display: flex; flex-direction: column; line-height: 1.15; }
.store-badge .sb-top { font-size: .66rem; color: #9fb3a9; letter-spacing: .02em; }
.store-badge .sb-main { font-weight: 700; font-size: 1.02rem; }
.store-badge .sb-soon {
  margin-left: 4px; align-self: center; font-size: .64rem; font-weight: 600;
  background: var(--green); color: #fff; padding: 3px 8px; border-radius: 999px;
  letter-spacing: .03em; text-transform: uppercase;
}
.store-note { margin-top: 12px; font-size: .9rem; color: var(--muted); }

/* Sections */
section.block { padding: 72px 0; }
section.block.alt { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 60ch; margin: 0 auto 48px; text-align: center; }
.section-head p { font-size: 1.08rem; color: var(--muted); margin-top: 12px; }

/* Feature grid */
.grid { display: grid; gap: 22px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
}
.card .ic {
  width: 44px; height: 44px; border-radius: 12px; background: var(--green-soft);
  color: var(--green-dark); display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.card .ic svg { width: 22px; height: 22px; }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--muted); font-size: .98rem; margin: 0; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: step; }
.step { padding: 24px; }
.step .num {
  width: 38px; height: 38px; border-radius: 50%; background: var(--green); color: #fff;
  font-weight: 700; display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.step h3 { margin-bottom: 6px; }
.step p { color: var(--muted); font-size: .98rem; margin: 0; }

/* Pricing / what you pay for */
.pay-list { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px 32px; }
.pay-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--body); }
.pay-list li::before {
  content: ""; flex: none; width: 20px; height: 20px; margin-top: 3px; border-radius: 50%;
  background: var(--green-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230b7a4d' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 12px no-repeat;
}

/* CTA banner */
.cta {
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  color: #fff; border-radius: 20px; padding: 56px 40px; text-align: center;
}
.cta h2 { color: #fff; }
.cta p { color: rgba(255, 255, 255, .9); max-width: 52ch; margin: 14px auto 28px; }
.cta .btn { background: #fff; color: var(--green-dark); }
.cta .btn:hover { background: #eafff5; }

/* Footer */
.site-footer { background: #0c1712; color: #b9c7c0; padding: 56px 0 32px; }
.site-footer a { color: #d6e3dd; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 32px; }
.footer-brand { max-width: 320px; }
.footer-brand .brand { color: #fff; margin-bottom: 12px; }
.footer-brand .brand .yi, .footer-brand .brand .circle { color: #fff; }
.footer-brand p { color: #8ea399; font-size: .94rem; }
.footer-col h4 { color: #fff; font-size: .9rem; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; font-size: .95rem; }
.footer-bottom {
  margin-top: 44px; padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .1);
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between;
  font-size: .88rem; color: #7d9189;
}

/* Legal / document pages */
.doc { padding: 56px 0 72px; }
.doc .container { max-width: 820px; }
.doc h1 { margin-bottom: 8px; }
.doc .updated { color: var(--muted); font-size: .95rem; margin-bottom: 36px; }
.doc h2 { font-size: 1.35rem; margin: 40px 0 12px; }
.doc h3 { font-size: 1.08rem; margin: 24px 0 8px; }
.doc p, .doc li { color: var(--body); }
.doc ul, .doc ol { margin: 0 0 1rem 1.3rem; }
.doc li { margin-bottom: 8px; }
.doc .toc {
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 26px; margin-bottom: 40px;
}
.doc .toc h2 { font-size: 1rem; margin: 0 0 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.doc .toc ul { list-style: none; margin: 0; columns: 2; }
.doc .toc li { margin-bottom: 8px; }
.doc .callout {
  background: var(--green-soft); border-left: 4px solid var(--green);
  padding: 16px 20px; border-radius: 8px; margin: 20px 0;
}
.doc .callout p:last-child { margin-bottom: 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; font-size: .96rem; }
.doc th, .doc td { border: 1px solid var(--line); padding: 12px 14px; text-align: left; vertical-align: top; }
.doc th { background: var(--bg-soft); color: var(--ink); font-weight: 600; }
.back-link { display: inline-block; margin-top: 40px; font-weight: 600; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 32px; align-items: start; }
.contact-card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.contact-card h3 { margin-bottom: 6px; }
.contact-card .big-mail { font-size: 1.3rem; font-weight: 700; color: var(--green-dark); }
.contact-card dl { margin-top: 18px; }
.contact-card dt { font-weight: 600; color: var(--ink); margin-top: 14px; }
.contact-card dd { margin: 2px 0 0; color: var(--muted); }

/* Responsive */
@media (max-width: 860px) {
  .grid.cols-3, .grid.cols-2, .steps, .pay-list { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .doc .toc ul { columns: 1; }
  .nav { gap: 16px; }
  .nav .hide-sm { display: none; }
  .hero { padding: 60px 0 52px; }
  section.block { padding: 52px 0; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .cta { padding: 40px 22px; }
  .footer-grid { gap: 26px; }
}