:root{--accent:#4338ca;--accent-ink:#fff;--bg:#fafaf9;--panel:#fff;--ink:#17181a;--muted:#5d636b;--line:#e4e4e0;--code:#f1f1ee;--ok:#1a7f4b;--warn:#a15c00;--err:#b42318}
@media (prefers-color-scheme:dark){:root{--bg:#0f1113;--panel:#171a1d;--ink:#eceae6;--muted:#9aa1a9;--line:#2a2e33;--code:#1d2125;--ok:#4cc38a;--warn:#e0a458;--err:#f08a80}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--accent)}a:hover{text-decoration:none}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);background:var(--panel)}
header.site .wrap{display:flex;align-items:center;gap:20px;min-height:60px;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.2rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.logo b{color:var(--accent)}
nav.main{display:flex;gap:16px;flex-wrap:wrap;margin-left:auto}
nav.main a{color:var(--muted);text-decoration:none;font-size:.95rem}nav.main a:hover,nav.main a[aria-current]{color:var(--ink)}
.hero{padding:64px 0 40px}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.1;margin:0 0 16px;letter-spacing:-.03em;max-width:18ch}
.hero p.lead{font-size:1.15rem;color:var(--muted);max-width:60ch;margin:0 0 24px}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);border:0;border-radius:8px;padding:11px 18px;font:inherit;font-weight:600;text-decoration:none;cursor:pointer}
.btn:hover{filter:brightness(1.08)}.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
section.block{padding:36px 0;border-top:1px solid var(--line)}
section.block h2{margin:0 0 16px;font-size:1.5rem;letter-spacing:-.02em}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px}
.card h3{margin:0 0 6px;font-size:1.05rem}.card p{margin:0;color:var(--muted)}
.price{font-size:2rem;font-weight:800;letter-spacing:-.03em}
pre,code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9rem}
pre{background:var(--code);border:1px solid var(--line);border-radius:10px;padding:14px;overflow:auto;margin:10px 0}
code{background:var(--code);padding:1px 5px;border-radius:5px}pre code{background:none;padding:0}
input,select,textarea{font:inherit;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:10px 12px;max-width:100%}
input:focus,select:focus,textarea:focus,.btn:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
label{display:block;font-weight:600;margin:12px 0 4px}
.msg{padding:10px 14px;border-radius:8px;border:1px solid var(--line);margin:12px 0}
.msg.ok{border-color:var(--ok);color:var(--ok)}.msg.warn{border-color:var(--warn);color:var(--warn)}.msg.err{border-color:var(--err);color:var(--err)}
.banner{background:#fff4d6;color:#5b4300;border-bottom:1px solid #ecd48a;padding:8px 0;font-size:.9rem}
@media (prefers-color-scheme:dark){.banner{background:#3a2f0e;color:#f3d98b;border-color:#5b4a14}}
table{width:100%;border-collapse:collapse;font-size:.92rem}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600}.tablewrap{overflow:auto;border:1px solid var(--line);border-radius:10px;background:var(--panel)}
.muted{color:var(--muted)}.small{font-size:.88rem}
footer.site{border-top:1px solid var(--line);margin-top:40px;padding:28px 0;color:var(--muted);font-size:.9rem}
footer.site .wrap{display:flex;gap:16px;flex-wrap:wrap;justify-content:space-between}
footer.site nav{display:flex;gap:14px;flex-wrap:wrap}footer.site a{color:var(--muted)}
.legal{max-width:760px;padding:40px 0}.legal h1{letter-spacing:-.02em}.legal h2{margin-top:28px;font-size:1.2rem}
.chat{display:grid;grid-template-rows:auto 1fr auto;height:calc(100vh - 200px);min-height:420px}
.chat .log{overflow:auto;padding:12px;border:1px solid var(--line);border-radius:10px;background:var(--panel);margin:10px 0}
.bubble{padding:10px 14px;border-radius:12px;margin:8px 0;max-width:85%;white-space:pre-wrap;word-wrap:break-word}
.bubble.user{background:var(--accent);color:var(--accent-ink);margin-left:auto}.bubble.bot{background:var(--code)}
.chat form{display:flex;gap:8px}.chat textarea{flex:1;min-height:48px;resize:vertical}
.keybox{word-break:break-all;background:var(--code);border:1px dashed var(--accent);border-radius:8px;padding:12px;font-family:ui-monospace,Menlo,monospace}
@media (max-width:640px){.hero{padding:40px 0 24px}nav.main{margin-left:0;width:100%}}