:root {
  --ink: #1c2321;
  --ink-2: #4a5552;
  --line: #dde4e1;
  --paper: #ffffff;
  --mist: #f3f6f5;
  --green: #0e7c5a;
  --green-ink: #0a5c43;
  --mint: #e3f3ec;
  --amber: #f2a541;
  --bubble: #e9edeb;
  --term: #15201c;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 17px/1.6 var(--sans); color: var(--ink); background: var(--paper); }
a { color: var(--green-ink); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; border-radius: 4px; }
code, pre, kbd { font-family: var(--mono); font-size: 0.9em; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* header */
.top { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; color: var(--ink); text-decoration: none; font-size: 18px; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.top nav { display: flex; gap: 22px; align-items: center; font-size: 15px; }
.top nav a { color: var(--ink-2); text-decoration: none; }
.top nav a:hover { color: var(--ink); }
.top nav .lang { border: 1px solid var(--line); padding: 3px 10px; border-radius: 999px; }

/* hero */
.hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; padding-top: 48px; padding-bottom: 72px; }
.hero h1 { font-size: clamp(36px, 5vw, 56px); line-height: 1.08; letter-spacing: -0.02em; margin: 0 0 20px; font-weight: 720; }
.hero p.lede { font-size: 19px; color: var(--ink-2); margin: 0 0 28px; max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 22px; border-radius: 12px; font-weight: 600; text-decoration: none; font-size: 16px; border: 0; cursor: pointer; }
.btn.primary { background: var(--green); color: #fff; }
.btn.primary:hover { background: var(--green-ink); }
.btn.quiet { color: var(--ink); background: var(--mist); }
.small { font-size: 14px; color: var(--ink-2); }

/* the demo: an SMS lands, the code shows up in a terminal */
.demo { position: relative; min-height: 380px; }
.phone { width: 280px; border-radius: 34px; background: var(--ink); padding: 12px; box-shadow: 0 30px 60px -30px rgba(14, 60, 45, 0.45); }
.screen { background: #f7f9f8; border-radius: 24px; height: 330px; padding: 46px 14px 14px; position: relative; overflow: hidden; }
.screen .clock { position: absolute; top: 12px; left: 0; right: 0; text-align: center; font-size: 12px; color: var(--ink-2); font-weight: 600; }
.sms { background: var(--bubble); border-radius: 18px 18px 18px 6px; padding: 10px 13px; font-size: 14px; line-height: 1.45; max-width: 92%; }
.sms .who { display: block; font-size: 12px; color: var(--ink-2); margin-bottom: 2px; }
.sms b { font-family: var(--mono); background: #fff3dc; padding: 0 3px; border-radius: 4px; }
.term { position: absolute; right: 0; bottom: 0; width: 330px; background: var(--term); color: #d7e5df; border-radius: 14px; padding: 16px 18px 20px; font: 14px/1.7 var(--mono); box-shadow: 0 24px 50px -24px rgba(0, 0, 0, 0.5); }
.term .bar { display: flex; gap: 6px; margin-bottom: 10px; }
.term .bar i { width: 10px; height: 10px; border-radius: 50%; background: #34433d; }
.term .p { color: #7fd1ae; }
.term .out { color: #fff; font-size: 22px; letter-spacing: 0.18em; }
.term .dim { color: #7d8f88; }

@media (prefers-reduced-motion: no-preference) {
  .sms { animation: arrive 0.5s 0.6s both cubic-bezier(.2,.8,.2,1); }
  .term .out { animation: land 0.01s 1.6s both; }
  .term .wait { animation: hide 0.01s 1.6s both; }
}
@keyframes arrive { from { opacity: 0; transform: translateY(-16px) scale(.96); } }
@keyframes land { from { visibility: hidden; } }
@keyframes hide { to { display: none; visibility: hidden; height: 0; } }

/* sections */
section { padding: 72px 0; }
section.alt { background: var(--mist); }
h2 { font-size: clamp(26px, 3.2vw, 36px); line-height: 1.15; letter-spacing: -0.015em; margin: 0 0 14px; font-weight: 700; }
h3 { font-size: 19px; margin: 0 0 6px; }
.intro { color: var(--ink-2); max-width: 40em; margin: 0 0 36px; }

/* steps: a real sequence */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps li { counter-increment: step; border-top: 2px solid var(--ink); padding-top: 16px; }
.steps li::before { content: counter(step); display: block; font: 600 15px var(--mono); color: var(--green); margin-bottom: 8px; }
.steps p { margin: 0; color: var(--ink-2); }

/* integrations */
.tabs { display: grid; grid-template-columns: 230px 1fr; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: var(--paper); }
.tabs .list { border-right: 1px solid var(--line); padding: 10px; }
.tabs button { display: block; width: 100%; text-align: left; background: none; border: 0; padding: 11px 14px; border-radius: 10px; font: inherit; font-size: 15px; color: var(--ink-2); cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--mint); color: var(--green-ink); font-weight: 600; }
.tabs .panel { padding: 22px 24px; min-width: 0; }
.tabs .panel p { margin: 0 0 12px; color: var(--ink-2); font-size: 15px; }
pre { background: var(--term); color: #d7e5df; padding: 16px 18px; border-radius: 12px; overflow-x: auto; line-height: 1.6; margin: 0 0 12px; font-size: 13.5px; }

/* forwarded */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.split > div { padding: 4px 0; }
.check { list-style: none; padding: 0; margin: 14px 0 0; }
.check li { padding: 8px 0 8px 28px; position: relative; border-bottom: 1px solid var(--line); }
.check li::before { content: ""; position: absolute; left: 4px; top: 17px; width: 10px; height: 6px; border-left: 2px solid var(--green); border-bottom: 2px solid var(--green); transform: rotate(-45deg); }

/* pricing */
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; background: var(--paper); max-width: 860px; }
.plan { padding: 28px 30px; }
.plan + .plan { border-left: 1px solid var(--line); background: #fbfdfc; }
.plan .price { font-size: 40px; font-weight: 720; letter-spacing: -0.02em; margin: 6px 0 4px; }
.plan .price small { font-size: 16px; font-weight: 500; color: var(--ink-2); }
.plan ul { padding-left: 18px; color: var(--ink-2); margin: 14px 0 0; }

/* faq */
.faq details { max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq summary { font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::after { content: "+"; color: var(--green); font-weight: 700; }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--ink-2); margin: 10px 0 0; }

/* docs */
.doc { display: grid; grid-template-columns: 210px 1fr; gap: 48px; padding-top: 32px; padding-bottom: 80px; }
.doc aside { position: sticky; top: 16px; align-self: start; font-size: 15px; }
.doc aside a { display: block; padding: 5px 0; color: var(--ink-2); text-decoration: none; }
.doc aside a:hover { color: var(--ink); }
.doc article { min-width: 0; max-width: 780px; }
.doc h1 { font-size: 38px; letter-spacing: -0.02em; margin: 0 0 12px; }
.doc h2 { font-size: 26px; margin-top: 48px; padding-top: 8px; }
.doc h3 { margin-top: 28px; }
.doc table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 10px 0 18px; }
.doc th, .doc td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc td code, .doc p code, .doc li code { background: var(--mist); padding: 1px 5px; border-radius: 5px; }

footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--ink-2); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
footer a { color: var(--ink-2); }

@media (max-width: 860px) {
  .hero, .split, .doc { grid-template-columns: 1fr; }
  .hero { gap: 36px; padding-top: 20px; }
  .demo { min-height: 400px; }
  .term { width: 300px; }
  .steps { grid-template-columns: 1fr; gap: 24px; }
  .tabs { grid-template-columns: 1fr; }
  .tabs .list { display: flex; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .tabs button { white-space: nowrap; width: auto; }
  .plans { grid-template-columns: 1fr; }
  .plan + .plan { border-left: 0; border-top: 1px solid var(--line); }
  .top nav a:not(.lang):not(.dl) { display: none; }
  .doc aside { position: static; }
}

/* download */
.get { display: grid; grid-template-columns: 1fr 220px; gap: 48px; align-items: start; padding-top: 40px; padding-bottom: 24px; }
.get h1 { font-size: clamp(32px, 4.4vw, 46px); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 14px; }
.qr { text-align: center; font-size: 14px; color: var(--ink-2); }
.qr img { width: 180px; height: 180px; display: block; margin: 0 auto 8px; border: 1px solid var(--line); border-radius: 14px; padding: 8px; background: #fff; }
.meta { font-size: 14px; color: var(--ink-2); margin-top: 14px; word-break: break-all; }
.guide { max-width: 780px; padding-bottom: 72px; }
.guide h2 { margin-top: 48px; }
.guide ol { padding-left: 22px; }
.guide li { margin: 8px 0; }
.guide .note { border-left: 3px solid var(--amber); padding: 4px 0 4px 16px; color: var(--ink-2); }
@media (max-width: 860px) { .get { grid-template-columns: 1fr; } .qr { display: none; } }