:root {
  --bg: #fbfbfa; --surface: #ffffff; --text: #15171a; --muted: #62676f; --line: #e6e6e3; --soft: #f2f2f0;
  --accent: #3d4fd8; --accent-text: #ffffff;
  --font: ui-sans-serif, -apple-system, "Segoe UI", "Inter", "Helvetica Neue", Arial, "Hiragino Sans", "Apple SD Gothic Neo", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e0f11; --surface: #16181b; --text: #ecedef; --muted: #8f959e; --line: #262a2f; --soft: #1b1e22; --accent: #8d98ff; --accent-text: #0e0f11; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 var(--font); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
code { font-family: var(--mono); font-size: 0.9em; background: var(--soft); padding: 1px 5px; border-radius: 4px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
.top { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 650; font-size: 18px; letter-spacing: -0.02em; text-decoration: none; }
.mark { width: 24px; height: 24px; }
.mark .dot { fill: var(--accent); stroke: var(--bg); stroke-width: 2.4; }
nav { display: flex; align-items: center; gap: 20px; font-size: 15px; }
nav > a:not(.btn) { color: var(--muted); text-decoration: none; }
nav > a:not(.btn):hover { color: var(--text); }
.btn { display: inline-flex; align-items: center; height: 40px; padding: 0 16px; border-radius: 9px; border: 1px solid var(--line); background: var(--surface); text-decoration: none; font-weight: 550; font-size: 15px; white-space: nowrap; }
.btn:hover { background: var(--soft); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.primary:hover { filter: brightness(1.08); }

.hero { padding-top: 88px; padding-bottom: 40px; }
.eyebrow { color: var(--muted); font-size: 14px; letter-spacing: 0.02em; margin: 0 0 18px; }
h1 { font-size: clamp(40px, 7vw, 68px); line-height: 1.04; letter-spacing: -0.035em; margin: 0 0 22px; font-weight: 700; }
h2 { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 10px; }
h3 { font-size: 17px; margin: 0 0 6px; }
.lede { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0 0 30px; }
.lede.small { font-size: 17px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }
.term { font-family: var(--mono); font-size: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; overflow-x: auto; white-space: nowrap; max-width: 760px; }
.term .prompt { color: var(--muted); margin-right: 8px; user-select: none; }
.term i { color: var(--accent); font-style: normal; }

.name { padding-top: 28px; padding-bottom: 56px; color: var(--muted); }
.name strong { color: var(--text); }
.name .jp { font-family: "Hiragino Mincho ProN", "Yu Mincho", serif; color: var(--text); margin: 0 2px; }

.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; padding-bottom: 72px; }
.grid3 article { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.grid3 p { color: var(--muted); margin: 0; font-size: 15px; }

#agent { padding-bottom: 72px; }
.promises { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.promises li { background: var(--surface); padding: 18px 20px; color: var(--muted); font-size: 15px; }
.promises b { color: var(--text); display: block; margin-bottom: 2px; }

.soon { padding-bottom: 80px; }
.soon ul { color: var(--muted); padding-left: 20px; margin: 10px 0 0; }
.soon li { margin: 6px 0; }

.foot { display: flex; justify-content: space-between; border-top: 1px solid var(--line); padding-top: 22px; padding-bottom: 40px; color: var(--muted); font-size: 14px; }
.foot a { text-decoration: none; }
.foot a:hover { color: var(--text); }

@media (max-width: 600px) {
  .hero { padding-top: 48px; }
  nav > a:not(.btn) { display: none; }
}