:root{--bg:#0f172a;--card:#1e293b;--text:#f8fafc;--muted:#94a3b8;--border:#334155;--accent-from:#38bdf8;--accent-to:#818cf8;--r-lg:24px;--r-md:16px;--trans:260ms cubic-bezier(.2,.9,.3,1);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--text);line-height:1.45;padding:20px;-webkit-tap-highlight-color:transparent}
a{text-decoration:none;color:inherit}img{max-width:100%;height:auto;display:block}.container{max-width:1120px;margin:0 auto;padding-bottom:28px}

/* header */
.header{display:flex;align-items:center;justify-content:space-between;padding:10px 6px;gap:12px}
.brand{display:flex;gap:10px;font-weight:600;font-size:18px;white-space:nowrap}
.logo-text{background:linear-gradient(90deg,var(--accent-from),var(--accent-to));-webkit-background-clip:text;color:transparent;-webkit-text-fill-color:transparent}
.topnav{display:flex;gap:10px;font-size:14px;flex-wrap:wrap}
.topnav a{padding:8px 10px;border-radius:10px;color:var(--muted);transition:var(--trans)}
.topnav a:hover{color:var(--text);background:rgba(255,255,255,0.02)}

/* hero */
.hero{background:var(--card);border-radius:var(--r-lg);padding:20px;margin-top:16px;box-shadow:0 6px 22px rgba(3,7,18,0.6),inset 0 1px rgba(255,255,255,0.01)}
.hero-inner{display:flex;flex-direction:column;text-align:center;gap:18px}
.hero h1{margin:0;font-size:20px}
.lead{color:var(--muted);margin:10px 0 18px;font-size:15px}
.cta-wrap{display:flex;flex-direction:column;gap:12px;align-items:center}
.btn-cta{padding:14px 18px;border-radius:12px;border:0;cursor:pointer;font-weight:600;font-size:15px;background:linear-gradient(90deg,var(--accent-from),var(--accent-to));color:#06121f;box-shadow:0 6px 18px rgba(8,12,30,0.6);transition:transform .18s,box-shadow .18s;min-width:220px}
.btn-cta:hover{transform:translateY(-6px);box-shadow:0 14px 40px rgba(8,12,30,0.7),0 0 60px rgba(56,189,248,0.12)}
.copy-status{font-size:13px;color:var(--muted);height:18px;transition:opacity .2s,transform .2s}
.copy-status.show{color:var(--accent-from);opacity:1;transform:translateY(0)}
.copy-status.hide{opacity:0;transform:translateY(-6px)}

/* tools grid */
.tools{margin-top:20px}
.tools h2{font-size:16px;margin:0 0 12px}
.grid{display:grid;grid-template-columns:1fr;gap:12px}
.card{display:flex;gap:12px;padding:14px;border-radius:var(--r-md);background:rgba(255,255,255,0.02);border:1px solid var(--border);transition:var(--trans);align-items:flex-start}
.card:hover{transform:translateY(-6px);border-color:var(--accent-from);background:rgba(255,255,255,0.03);box-shadow:0 10px 30px rgba(8,12,30,0.55)}
.emoji{font-size:28px;width:44px;height:44px;display:grid;place-items:center;background:rgba(255,255,255,0.05);border-radius:10px;flex-shrink:0}
.card h3{margin:0 0 6px;font-size:15px}
.card p{margin:0;color:var(--muted);font-size:13px}

/* content area */
.content-area{max-width:800px;margin:22px auto 0;color:var(--muted)}
.content-area h3{color:var(--text);margin:14px 0 6px;font-size:15px}
.content-area p{font-size:14px;line-height:1.6}
.faq dt{font-weight:700;color:var(--text);margin-top:12px}
.faq dd{margin:4px 0 0;color:var(--muted);font-size:13px}

/* footer */
footer{text-align:center;margin:36px 0;color:var(--muted);font-size:13px}

/* responsiveness */
@media(min-width:640px){.hero-inner{flex-direction:row;text-align:left;align-items:center}.cta-wrap{align-items:flex-end}}
@media(min-width:768px){.grid{grid-template-columns:repeat(4,1fr)}}