/* Pairpad landing. Dark green and white, alternating slabs, system sans, square buttons. */
:root {
  --green: #004008;
  --green-2: #063f0e;
  --green-deep: #002b05;
  --green-soft: #e9f1ea;
  --green-line: #cfdccf;
  --ink: #0c0c0c;
  --text: #3c3c3c;
  --muted: #6b6b6b;
  --line: #e2e2e2;
  --white: #fff;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --wrap: 1296px;
  --pad: 72px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 400 16px/1.5 var(--font); color: var(--ink); background: var(--white); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3 { margin: 0; font-weight: 500; letter-spacing: -.01em; color: var(--green); }
h1 { font-size: 64px; line-height: 1.1; }
h2 { font-size: 40px; line-height: 1.15; }
h3 { font-size: 20px; line-height: 1.2; }
p { margin: 0; color: var(--text); }
.mono { font-family: var(--mono); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--pad); }
.dark { background: var(--green); color: var(--white); }
.dark h1, .dark h2, .dark h3 { color: var(--white); }
.dark p { color: rgba(255, 255, 255, .78); }

/* buttons: square, 1px, arrow */
.btn { display: inline-flex; align-items: center; gap: 12px; padding: 12px 20px; border: 1px solid var(--green); background: var(--green); color: var(--white); font-size: 15px; line-height: 1.6; transition: background .15s, color .15s; }
.btn:hover { background: var(--green-deep); border-color: var(--green-deep); }
.btn.outline { background: transparent; color: var(--green); }
.btn.outline:hover { background: var(--green-soft); }
.dark .btn { background: var(--white); color: var(--green); border-color: var(--white); }
.dark .btn:hover { background: var(--green-soft); }
.dark .btn.outline { background: transparent; color: var(--white); }
.dark .btn.outline:hover { background: rgba(255,255,255,.1); }
.btn .arr { width: 16px; height: 16px; }
.btns { display: flex; gap: 16px; flex-wrap: wrap; }
/* contract address pill */
.ca { display: inline-flex; align-items: center; gap: 12px; margin-top: 20px; padding: 10px 14px; border: 1px solid var(--line); background: var(--white); color: var(--ink); font: inherit; font-size: 13px; cursor: pointer; max-width: 100%; }
.ca:hover { border-color: var(--green); }
.ca .lbl { color: var(--green); font-weight: 500; white-space: nowrap; }
.ca .addr { font-family: var(--mono); color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ca .copy { color: var(--muted); border-left: 1px solid var(--line); padding-left: 12px; white-space: nowrap; }
@media (max-width: 960px) { .ca .addr { max-width: 46vw; } }

/* nav */
.nav { position: sticky; top: 0; z-index: 30; background: var(--white); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 112px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 500; color: var(--green); }
.brand img { width: 36px; height: 36px; }
.menu { display: flex; gap: 44px; font-size: 16px; color: var(--ink); }
.menu a:hover { color: var(--green); }
.navr { display: flex; align-items: center; gap: 16px; }
.xlink { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border: 1px solid var(--line); color: var(--green); }
.xlink:hover { border-color: var(--green); background: var(--green-soft); }
.xlink .xi { width: 18px; height: 18px; }

/* hero */
.hero { position: relative; overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1fr 1fr; align-items: center; min-height: 760px; gap: 40px; }
.hero h1 { max-width: 12ch; }
.hero p { font-size: 19px; line-height: 1.55; max-width: 44ch; margin: 44px 0 48px; color: var(--ink); }
.hero .art { position: relative; display: flex; justify-content: center; align-items: center; }
.disc { width: 420px; height: 420px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 14px var(--green-soft), 0 40px 80px rgba(0, 64, 8, .18); display: flex; align-items: center; justify-content: center; position: relative; }
.disc::before { content: ""; position: absolute; inset: 22px; border-radius: 50%; border: 1px solid rgba(255,255,255,.18); }
.disc img { width: 210px; height: 210px; }
.net { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero .wrap > * { position: relative; z-index: 1; }

/* logos strip */
.strip { padding: 24px 0 96px; text-align: center; }
.strip h2 { font-size: 22px; margin-bottom: 40px; color: var(--ink); }
.logos { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
.logos div { padding: 30px 16px; border-right: 1px solid var(--line); font-weight: 500; font-size: 20px; color: var(--green); display: flex; align-items: center; justify-content: center; gap: 10px; }
.logos div:last-child { border-right: 0; }
.logos small { font-size: 12px; color: var(--muted); font-weight: 400; }

/* sections */
.sec { padding: 112px 0; }
.sec.tight { padding: 80px 0; }
.center { text-align: center; }
.center h1 { font-size: 32px; line-height: 1.3; max-width: 30ch; margin: 0 auto; }
.center h2 { max-width: 24ch; margin: 0 auto; }
.center p { max-width: 68ch; margin: 24px auto 0; font-size: 15px; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.two.rev > :first-child { order: 2; }
.two h2 { max-width: 15ch; }
.two p { margin-top: 24px; font-size: 15px; max-width: 52ch; }
.two p + p { margin-top: 16px; }
.two .btn { margin-top: 36px; }
.tag { display: inline-block; font-size: 13px; padding: 8px 12px; border: 1px solid var(--line); color: var(--ink); margin-bottom: 32px; background: var(--white); }
.dark .tag { border-color: rgba(255,255,255,.25); color: var(--white); background: transparent; }

/* figure boxes */
.fig { width: 100%; }
.fig svg { width: 100%; height: auto; display: block; }
.fig .cap { font-size: 12px; color: var(--muted); margin-top: 12px; text-align: center; }

/* numbers */
.nums { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.14); margin-top: 64px; }
.nums div { background: var(--green); padding: 36px 32px; }
.nums span { display: block; font-size: 13px; color: rgba(255,255,255,.7); }
.nums b { display: block; font-size: 40px; font-weight: 500; margin-top: 12px; font-family: var(--mono); letter-spacing: -.02em; }
.nums small { font-size: 13px; color: rgba(255,255,255,.7); font-family: var(--font); }
.nums b.ok::after { content: " ✓"; color: rgba(255,255,255,.7); font-size: 22px; }

/* accordion list */
.acc { border: 1px solid var(--line); }
.acc a { display: flex; align-items: center; justify-content: space-between; padding: 26px 28px; border-bottom: 1px solid var(--line); }
.acc a:last-child { border-bottom: 0; }
.acc a:hover { background: var(--green-soft); }
.acc h3 { display: flex; align-items: center; gap: 12px; font-size: 18px; color: var(--ink); }
.acc h3 img { width: 18px; height: 18px; }
.acc .chev { width: 16px; height: 16px; color: var(--green); }

/* code */
.code { background: var(--green-deep); color: #e6f0e6; font: 13px/1.7 var(--mono); padding: 28px 28px 28px 0; overflow-x: auto; border: 1px solid rgba(0,0,0,.2); }
.code ol { margin: 0; padding-left: 56px; list-style: decimal; color: rgba(255,255,255,.35); }
.code li { padding-left: 8px; }
.code li span { color: #e6f0e6; }
.code .k { color: #9fd3a5; } .code .s { color: #f1e3a0; } .code .c { color: rgba(255,255,255,.45); } .code .n { color: #cde7cf; }

/* use cases */
.cases { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: start; }
.cases .list { border-top: 1px solid rgba(255,255,255,.18); }
.cases .list a { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 28px 0; border-bottom: 1px solid rgba(255,255,255,.18); font-size: 17px; font-weight: 500; }
.cases .list a span { color: rgba(255,255,255,.6); font-weight: 400; font-size: 14px; display: block; margin-top: 4px; }
.cases .list .chev { width: 18px; height: 18px; flex: none; }
.cases h2 { max-width: 16ch; }
.cases p { margin-top: 24px; max-width: 46ch; font-size: 15px; }

/* chains grid */
.grid3 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 56px; }
.grid3 div { background: var(--white); padding: 32px 28px; min-height: 200px; }
.grid3 h3 { font-size: 20px; color: var(--ink); }
.grid3 p { font-size: 14px; margin-top: 12px; }
.grid3 .st { display: inline-block; font-size: 12px; padding: 4px 8px; border: 1px solid var(--green-line); color: var(--green); margin-top: 20px; }
.grid3 .st.soon { color: var(--muted); border-color: var(--line); }

/* get involved */
.cta .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.cta .row { display: grid; gap: 16px; }
.cta .row a { display: flex; justify-content: space-between; align-items: center; padding: 22px 26px; border: 1px solid var(--line); font-size: 17px; font-weight: 500; color: var(--ink); }
.cta .row a:hover { background: var(--green-soft); }

/* footer */
.foot { padding: 64px 0 40px; }
.foot .wrap { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; }
.foot h4 { margin: 0 0 16px; font-size: 13px; font-weight: 500; color: rgba(255,255,255,.6); text-transform: none; }
.foot a, .foot li { display: block; color: var(--white); font-size: 15px; margin-bottom: 10px; }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot .fine { grid-column: 1 / -1; border-top: 1px solid rgba(255,255,255,.18); padding-top: 24px; font-size: 13px; color: rgba(255,255,255,.6); display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.foot .fine .mono { word-break: break-all; }

@media (max-width: 960px) {
  :root { --pad: 24px; }
  h1 { font-size: 44px; }
  h2 { font-size: 32px; }
  .nav .wrap { height: 80px; }
  .menu { display: none; }
  .hero .wrap { grid-template-columns: 1fr; min-height: 0; padding-top: 56px; padding-bottom: 56px; }
  .hero .art { order: -1; }
  .disc { width: 260px; height: 260px; } .disc img { width: 130px; height: 130px; }
  .logos { grid-template-columns: 1fr 1fr; } .logos div:nth-child(2) { border-right: 0; } .logos div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .two, .cases, .cta .wrap { grid-template-columns: 1fr; gap: 40px; }
  .two.rev > :first-child { order: 0; }
  .nums, .grid3 { grid-template-columns: 1fr 1fr; }
  .sec { padding: 72px 0; }
  .foot .wrap { grid-template-columns: 1fr 1fr; }
}