:root{
  --bg:#0b0c0e; --bg2:#121317; --card:#16181d; --line:#2a2e36;
  --text:#e9edf2; --dim:#9aa4af; --accent:#28c2d6; --accent2:#48d6e8;
  --radius:14px; --max:1080px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"SF Mono", "Cascadia Code",Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font);line-height:1.6;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
a{color:var(--accent2);text-decoration:none}
a:hover{text-decoration:underline}
code{font-family:var(--mono);font-size:.92em;background:#1c1f25;
  padding:.12em .4em;border-radius:6px;color:#d8e6ec}
h1,h2,h3{line-height:1.2;letter-spacing:-.01em}

/* nav */
.nav{position:sticky;top:0;z-index:10;background:rgba(11,12,14,.82);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:58px}
.brand{display:flex;align-items:center;gap:9px;color:var(--text);font-weight:700;
  font-size:1.05rem}
.brand:hover{text-decoration:none}
.nav-links{display:flex;gap:22px}
.nav-links a{color:var(--dim);font-size:.93rem;font-weight:500}
.nav-links a:hover{color:var(--text);text-decoration:none}
@media(max-width:640px){.nav-links a:not(:last-child){display:none}}

/* hero */
.hero{padding:84px 0 64px;text-align:center;
  background:radial-gradient(900px 380px at 50% -10%,rgba(40,194,214,.16),transparent 70%)}
.hero-logo{filter:drop-shadow(0 10px 30px rgba(40,194,214,.35));border-radius:22px}
.hero h1{font-size:3.4rem;margin:.35em 0 .1em;font-weight:800}
.tagline{max-width:680px;margin:0 auto;color:var(--dim);font-size:1.18rem}
.tagline strong{color:var(--text)}
.cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:30px 0 12px}
.cta-sub{color:var(--dim);font-size:.92rem;margin:0}

.btn{display:inline-block;padding:13px 24px;border-radius:11px;font-weight:700;
  font-size:1rem;cursor:pointer;border:1px solid transparent;transition:.15s}
.btn-primary{background:var(--accent);color:#042830}
.btn-primary:hover{background:var(--accent2);text-decoration:none;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line);font-family:var(--mono);
  font-weight:600;font-size:.95rem}
.btn-ghost:hover{border-color:var(--accent);text-decoration:none}

/* bands & sections */
.band{padding:46px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--bg2)}
.lead{max-width:780px;margin:0 auto;text-align:center;font-size:1.16rem;color:var(--dim)}
.lead code{font-size:.9em}
.lead em{color:var(--text);font-style:normal;border-bottom:1px dashed var(--line)}
.section{padding:70px 0}
.section.alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section h2,.closing h2{font-size:2rem;margin:0 0 30px;text-align:center}

/* feature grid */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;transition:.15s}
.card:hover{border-color:var(--accent);transform:translateY(-3px)}
.card .ic{font-size:1.7rem;line-height:1}
.card h3{margin:.5em 0 .35em;font-size:1.18rem}
.card p{margin:0;color:var(--dim);font-size:.97rem}

/* columns */
.cols{display:grid;grid-template-columns:1fr 1fr;gap:34px}
.cols3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:760px){.cols,.cols3{grid-template-columns:1fr}}
.cols h3,.cols3 h3{margin:0 0 12px;font-size:1.2rem}
.muted{color:var(--dim);font-size:.92rem}

/* code blocks */
.code{position:relative;background:#0e1014;border:1px solid var(--line);
  border-radius:11px;overflow:hidden;margin:0 0 12px}
.code pre{margin:0;padding:16px 18px;overflow-x:auto}
.code code{background:none;padding:0;color:#cfe3f7;font-size:.88rem;line-height:1.55}
.copy{position:absolute;top:8px;right:8px;background:#1c1f25;color:var(--dim);
  border:1px solid var(--line);border-radius:7px;padding:4px 10px;font-size:.78rem;
  cursor:pointer;font-family:var(--font)}
.copy:hover{color:var(--text);border-color:var(--accent)}
.copy.ok{color:#5be39a;border-color:#5be39a}

/* closing + footer */
.closing{text-align:center}
.center{text-align:center}
.closing h2{margin:14px 0 24px}
.foot{padding:28px 0;color:var(--dim);font-size:.9rem}
.foot-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.foot a{color:var(--dim)}
.foot a:hover{color:var(--text)}

@media(max-width:560px){.hero h1{font-size:2.5rem}.tagline{font-size:1.05rem}}

/* ── usage guide page ─────────────────────────────────────────────── */
.guide-hero{padding:54px 0 8px;text-align:center}
.guide-hero h1{font-size:2.4rem;margin:.2em 0 .15em}
.guide-hero p{color:var(--dim);max-width:660px;margin:0 auto;font-size:1.08rem}
.feature{padding:34px 0;border-top:1px solid var(--line)}
.feature:first-of-type{border-top:none}
.feature h3{font-size:1.45rem;margin:0 0 8px}
.feature .desc{color:var(--dim);margin:0 0 18px;max-width:780px}
.mode{margin:0 0 14px}
.mode .tag{display:inline-block;font-size:.7rem;font-weight:800;letter-spacing:.06em;
  text-transform:uppercase;padding:3px 9px;border-radius:6px;margin-bottom:8px}
.tag.gui{background:rgba(40,194,214,.18);color:var(--accent2)}
.tag.cli{background:rgba(123,227,154,.15);color:#7be39a}
.tag.py{background:rgba(199,155,255,.16);color:#c79bff}
.mode .step{margin:.1em 0 0;color:var(--text)}
.mode .code{margin-top:4px}
.guide-toc{display:flex;flex-wrap:wrap;gap:8px 16px;justify-content:center;
  margin:22px auto 4px;max-width:840px}
.guide-toc a{color:var(--dim);font-size:.9rem}
.guide-toc a:hover{color:var(--accent2)}

/* numbered GUI steps */
.steps{margin:.15em 0 0;padding-left:1.3em;color:var(--text)}
.steps li{margin:.3em 0}
.steps li::marker{color:var(--accent2);font-weight:700}
.steps b{font-weight:600}

/* a neutral tag (e.g. "GUI only") + a "new" pill */
.tag.note{background:rgba(154,164,175,.14);color:var(--dim)}
.badge-new{display:inline-block;font-size:.62rem;font-weight:800;letter-spacing:.06em;
  text-transform:uppercase;vertical-align:middle;margin-left:8px;padding:2px 7px;
  border-radius:20px;background:rgba(40,194,214,.16);color:var(--accent2);
  border:1px solid rgba(40,194,214,.4)}

/* "what's new" band (home) */
.whatsnew{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));
  gap:18px;margin-top:6px}
.wn{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--accent);
  border-radius:12px;padding:18px 20px}
.wn h3{margin:0 0 10px;font-size:1.1rem;display:flex;align-items:center;gap:10px}
.wn .ver{font-family:var(--mono);font-size:.72rem;color:var(--accent2);
  border:1px solid var(--line);border-radius:20px;padding:2px 9px;font-weight:600}
.wn ul{margin:0;padding-left:1.1em;color:var(--dim);font-size:.95rem}
.wn li{margin:.34em 0}
.wn li b{color:var(--text);font-weight:600}