:root {
  --bg: #f7f7f4;
  --ink: #141414;
  --mute: #5e5e5a;
  --line: #e4e4de;
  --card: #fff;
  --cmd: #171717;
  --sans: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  background-image: radial-gradient(#d8d8d2 0.7px, transparent 0.7px);
  background-size: 18px 18px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.55;
}
a { color: inherit; }
code { font-family: var(--mono); font-size: 0.88em; }

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem clamp(1.1rem, 5vw, 3.5rem);
}
.nav nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.75rem 1.15rem;
  font-size: 0.95rem;
}
.nav a { text-decoration: none; color: var(--mute); }
.nav a:hover { color: var(--ink); }
.brand, .logo {
  font-weight: 700;
  letter-spacing: -0.04em;
  text-decoration: none;
  color: inherit;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}
.brand img {
  display: block;
  border-radius: 7px;
}

.hero {
  text-align: center;
  padding: clamp(2.4rem, 8vw, 5.5rem) clamp(1.1rem, 5vw, 3.5rem) 3rem;
  max-width: 46rem;
  margin: 0 auto;
}
.badge {
  display: inline-block;
  margin: 0 0 1.1rem;
  padding: 0.28rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--mute);
  font-size: 0.8rem;
}
h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.1rem, 7.2vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
  font-weight: 700;
}
h2 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.45rem, 4vw, 2rem);
  letter-spacing: -0.03em;
}
h3 { margin: 0 0 0.45rem; font-size: 1.05rem; }
.lede, .fine, .kicker {
  color: var(--mute);
  margin: 0 auto 1.4rem;
  max-width: 34rem;
}
.cmd-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}
.or {
  margin: 1.25rem 0 0.2rem;
  color: var(--mute);
  font-size: 0.95rem;
  text-align: center;
}
.kicker {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.tools {
  margin: 1.8rem 0 0;
  color: var(--mute);
  font-size: 0.92rem;
  line-height: 1.7;
}

.cmd-wrap {
  display: flex;
  justify-content: center;
  width: 100%;
  max-width: 100%;
}
.cmd {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  width: max-content;
  max-width: 100%;
  margin: 0.55rem 0;
  padding: 0.55rem 0.55rem 0.55rem 1rem;
  background: var(--cmd);
  color: #f4f1ea;
  border-radius: 999px;
  text-align: left;
}
.cmd .prompt {
  color: #8a8a8a;
  font-family: var(--mono);
  flex: 0 0 auto;
}
.cmd code {
  flex: 1 1 auto;
  min-width: 0;
  max-width: min(34rem, calc(100vw - 8.5rem));
  color: inherit;
  font-size: 0.84rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cmd .copy {
  flex: 0 0 auto;
  border: 0;
  background: #2c2c2c;
  color: #eee;
  border-radius: 999px;
  padding: 0.32rem 0.75rem;
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
}
.cmd .copy:hover { background: #3a3a3a; }

.demo {
  padding: 1rem clamp(1.1rem, 5vw, 3.5rem) 3rem;
  max-width: 52rem;
  margin: 0 auto;
  text-align: center;
}
.stage {
  margin: 1.6rem auto 0;
  background: #141414;
  color: #d8d4ca;
  border-radius: 18px;
  overflow: hidden;
  text-align: left;
  min-height: 16.5rem;
  box-shadow: 0 18px 50px rgba(20, 20, 20, 0.12);
}
.stage-bar {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #2a2a2a;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: #9a958c;
}
.stage-bar .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #c9a15b;
  flex-shrink: 0;
}
.stage-bar .path {
  margin-left: auto;
  opacity: 0.75;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#sim-agent { color: #f0ebe3; flex: 0 0 auto; }
.stage-body {
  margin: 0;
  padding: 1rem 1.1rem 1.3rem;
  min-height: 12.5rem;
  font-family: var(--mono);
  font-size: clamp(0.72rem, 2.4vw, 0.84rem);
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.stage-body .you { color: #c4c0b6; }
.stage-body .ai { color: #e8e4da; }
.stage-body .err { color: #f0a8a0; }
.stage-body .ok { color: #b8d4bc; }
.stage-body .cmdl { color: #f3efe6; }
.caret {
  display: inline-block;
  width: 0.5ch;
  background: #e8d7a3;
  animation: blink 0.9s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.beats {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem 1.2rem;
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  color: var(--mute);
  font-size: 0.9rem;
}
.beats li.on { color: var(--ink); font-weight: 650; }

.band {
  max-width: 52rem;
  margin: 0 auto;
  padding-left: clamp(1.1rem, 5vw, 3.5rem);
  padding-right: clamp(1.1rem, 5vw, 3.5rem);
}
.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: 1rem;
  padding-bottom: 3.4rem;
}
.facts article {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.2rem 1.15rem 1.3rem;
}
.facts h3 {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
  white-space: nowrap;
}
.facts p {
  margin: 0;
  color: var(--mute);
  font-size: 0.95rem;
  line-height: 1.45;
  min-height: calc(1.45em * 2);
}

.faq { padding-bottom: 3.6rem; }
.faq h2 { margin-bottom: 1.4rem; }
.faq dl { margin: 0; }
.faq dl > div {
  padding: 1.15rem 0;
  border-top: 1px solid var(--line);
}
.faq dt { font-weight: 650; margin-bottom: 0.35rem; }
.faq dd { margin: 0; color: var(--mute); }

.install {
  text-align: center;
  padding: 0 clamp(1.1rem, 5vw, 3.5rem) 4.2rem;
  max-width: 46rem;
  margin: 0 auto;
}
.fine { margin-top: 1rem; font-size: 0.92rem; }

footer {
  background: #111;
  color: #e8e4da;
  padding: 3.4rem clamp(1.1rem, 5vw, 3.5rem) 1.8rem;
}
.foot-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
  max-width: 64rem;
  margin: 0 auto;
}
.foot-brand {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  max-width: 28rem;
}
.foot-brand img {
  display: block;
  border-radius: 10px;
  flex-shrink: 0;
}
footer .logo {
  margin: 0 0 0.45rem;
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  color: #fff;
}
footer .tag { margin: 0; color: #9a958c; }
.foot-actions {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-width: 11.5rem;
}
.btn {
  display: block;
  text-align: center;
  text-decoration: none;
  border-radius: 999px;
  padding: 0.62rem 1.1rem;
  font-size: 0.95rem;
}
.btn.light { background: #fff; color: #111; }
.btn.ghost {
  background: transparent;
  color: #fff;
  border: 1px solid #3a3a3a;
}
.btn.light:hover { background: #ececec; }
.btn.ghost:hover { border-color: #888; }
.foot-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.4rem;
  max-width: 64rem;
  margin: 2.4rem auto 0;
  padding-top: 1.3rem;
  border-top: 1px solid #2a2a2a;
  color: #8a8680;
  font-size: 0.86rem;
}
.foot-meta a { color: #b8b4aa; text-decoration: none; }
.foot-meta a:hover { color: #fff; }

@media (max-width: 800px) {
  .facts {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
  }
  .facts article { min-height: 0; }
  .facts h3 { white-space: normal; }
  .foot-top {
    flex-direction: column;
    align-items: stretch;
  }
  .foot-actions { min-width: 0; }
}

@media (max-width: 420px) {
  .cmd { padding-left: 0.8rem; }
  .cmd code { font-size: 0.74rem; }
  .nav {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .nav nav {
    flex-wrap: nowrap;
    gap: 0.7rem;
    font-size: 0.88rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .caret { animation: none; }
}