:root{
  --bg0:#070b16; --bg1:#0b1220; --panel:#0e1a30; --line:#16305c;
  --blue:#3b82f6; --cyan:#22d3ee; --text:#e6eefc; --muted:#8aa2c4;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;font-family:"Segoe UI",Arial,Helvetica,sans-serif;color:var(--text);
  background:
    radial-gradient(1200px 600px at 50% -10%, #12315e 0%, rgba(18,49,94,0) 60%),
    linear-gradient(180deg,var(--bg0),var(--bg1));
}
#home{display:block}
.hero{min-height:88vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px;width:min(640px,92vw);margin:0 auto}
.brand{display:flex;align-items:center;justify-content:center;gap:12px}
.brand h1{
  margin:0;font-size:44px;letter-spacing:.14em;font-weight:800;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.dot{width:18px;height:18px;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,var(--cyan),var(--blue));
  box-shadow:0 0 18px rgba(59,130,246,.8)}
.tag{color:var(--muted);margin:10px 0 26px;font-size:15px}
.bar{
  display:flex;gap:10px;background:var(--panel);border:1px solid var(--line);
  border-radius:14px;padding:8px;box-shadow:0 12px 40px rgba(0,0,0,.5);width:100%
}
.bar input{flex:1;background:transparent;border:0;outline:none;color:var(--text);font-size:16px;padding:12px 14px}
.bar input::placeholder{color:#5f79a3}
.bar button{
  border:0;border-radius:10px;padding:0 22px;font-size:15px;font-weight:700;color:#04101f;cursor:pointer;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
}
.bar button:hover{filter:brightness(1.08)}
.err{color:#ff8080;min-height:18px;margin:10px 2px;font-size:13px}
.shortcuts{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:22px}
.chip{
  background:var(--panel);border:1px solid var(--line);color:var(--text);
  border-radius:999px;padding:10px 20px;font-size:14px;font-weight:600;cursor:pointer;
  transition:transform .08s ease,border-color .15s ease
}
.chip:hover{transform:translateY(-1px);border-color:var(--blue)}

/* SEO content */
.seo{max-width:820px;margin:0 auto;padding:10px 24px 80px;line-height:1.65}
.seo h2{font-size:24px;margin:38px 0 12px;color:#dbe7ff}
.seo h3{font-size:17px;margin:0 0 6px;color:#eaf1ff}
.seo p{color:#aebfda;margin:0 0 14px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:8px 0 6px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px}
.card p{margin:0;font-size:14px}
.steps{color:#aebfda;padding-left:20px}
.steps li{margin:8px 0}
.seo details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:10px 0}
.seo details summary{cursor:pointer;font-weight:600;color:#eaf1ff}
.seo details p{margin:10px 0 2px;font-size:14px}
.foot{margin-top:34px;color:#6f86ac;font-size:13px;text-align:center}

/* browsing view: 50px header + borderless full-viewport frame */
.bar-top{
  position:fixed;top:0;left:0;right:0;height:50px;z-index:10;
  display:flex;align-items:center;padding:0 14px;
  background:#0b1220;border-bottom:1px solid var(--line);
  box-shadow:0 2px 10px rgba(0,0,0,.45);
}
#logo{height:26px;cursor:pointer}
.frame-wrap{position:fixed;top:50px;left:0;right:0;bottom:0}
/* The frame shows the proxied site as-is. Use a neutral white canvas (the
   browser default for documents) so our dark theme never bleeds into it.
   CSS in this document cannot cross into the iframe; only this element's own
   background could show through, so keep it neutral. */
#sjframe{border:0;width:100%;height:100%;display:block;background:#fff}
[hidden]{display:none}
body.browsing{overflow:hidden}
body.browsing #home{display:none}
body.browsing .bar-top{display:flex}
body.browsing .frame-wrap{display:block}