:root{
  --bg:#0f172a;
  --card:#1e293b;
  --card-2:#172033;
  --border:#334155;
  --text:#e2e8f0;
  --muted:#94a3b8;
  --primary:#38bdf8;
  --success:#10b981;
  --danger:#ef4444;
  --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;line-height:1.5;}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--primary)}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}

/* Navbar */
.navbar{position:sticky;top:0;z-index:40;background:rgba(15,23,42,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--success));color:#0f172a;font-weight:900;box-shadow:0 8px 24px -6px rgba(56,189,248,.5)}
.brand-name{font-weight:700}
.brand-tag{font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted)}
.nav-links{display:flex;gap:22px;color:var(--muted);font-size:14px}
@media(max-width:520px){.nav-links{display:none}}

/* Hero */
.hero{position:relative;text-align:center;padding:60px 0;border-bottom:1px solid var(--border);overflow:hidden}
.hero:before{content:"";position:absolute;top:-100px;left:50%;transform:translateX(-50%);
  width:640px;height:260px;background:rgba(56,189,248,.25);filter:blur(90px);border-radius:50%;pointer-events:none}
.hero h1{font-size:44px;margin:12px 0 10px;font-weight:900;letter-spacing:-.02em}
@media(max-width:640px){.hero h1{font-size:32px}}
.hero .lead{max-width:640px;margin:0 auto;color:var(--muted)}
.badge{display:inline-flex;align-items:center;gap:8px;padding:4px 12px;font-size:12px;
  border:1px solid rgba(56,189,248,.4);background:rgba(56,189,248,.1);color:var(--primary);border-radius:999px}
.badge .dot{width:6px;height:6px;background:var(--success);border-radius:50%;display:inline-block}
.grad{background:linear-gradient(90deg,var(--primary),var(--success));-webkit-background-clip:text;background-clip:text;color:transparent}

/* Tabs */
.tabs-wrap{position:sticky;top:64px;z-index:30;background:rgba(15,23,42,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.tabs{display:flex;gap:10px;overflow-x:auto;padding:12px 20px}
.tab{flex-shrink:0;padding:8px 16px;font-size:14px;font-weight:500;
  border:1px solid var(--border);background:rgba(30,41,59,.6);color:var(--muted);border-radius:999px;
  cursor:pointer;transition:all .25s}
.tab:hover{border-color:var(--primary);color:var(--primary)}
.tab.active{background:var(--primary);color:#0f172a;border-color:var(--primary);box-shadow:0 8px 20px -6px rgba(56,189,248,.5)}

/* Main + panels */
.main{padding:32px 20px 40px;max-width:820px}
.tab-panel{display:none;animation:fade .35s ease}
.tab-panel.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* Card */
.card{background:linear-gradient(180deg,rgba(30,41,59,.95),rgba(15,23,42,.9));
  border:1px solid var(--border);border-radius:16px;padding:24px;
  box-shadow:0 20px 60px -30px rgba(56,189,248,.4);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-2px);box-shadow:0 24px 70px -25px rgba(56,189,248,.55)}
.card-head h2{margin:0 0 4px;font-size:22px}
.card-head p{margin:0 0 18px;color:var(--muted);font-size:14px}

/* Form */
.grid{display:grid;gap:14px}
.grid-2{grid-template-columns:1fr 1fr}
.grid-3{grid-template-columns:1fr 1fr 1fr}
@media(max-width:600px){.grid-2,.grid-3{grid-template-columns:1fr}}
label{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}
input,select{width:100%;margin-top:6px;padding:10px 12px;border-radius:8px;
  background:rgba(15,23,42,.7);border:1px solid var(--border);color:var(--text);font-size:15px;outline:none;
  transition:border-color .2s,box-shadow .2s}
input:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(56,189,248,.3)}

/* Stats */
.stats{margin-top:24px}
.stat{background:rgba(15,23,42,.5);border:1px solid var(--border);border-radius:10px;padding:14px}
.stat span{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.stat b{display:block;margin-top:6px;font-size:20px;font-weight:700;transition:color .2s}
.success{color:var(--success)!important}
.danger{color:var(--danger)!important}
.brand{color:var(--primary)!important}

/* Ad slots */
.ad-slot{margin:20px 0;padding:16px;text-align:center;font-size:12px;color:var(--muted);
  border:1px dashed rgba(56,189,248,.5);border-radius:10px;background:rgba(30,41,59,.5)}

/* SEO copy */
.seo{margin-top:28px;color:var(--muted);font-size:15px;line-height:1.7}
.seo h3{color:var(--text);margin:22px 0 8px;font-size:17px}
.seo p{margin:0 0 14px}

/* Footer */
.footer{margin-top:60px;background:rgba(30,41,59,.4);border-top:1px solid var(--border);padding:32px 0}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
@media(max-width:720px){.footer-grid{grid-template-columns:1fr 1fr}}
.footer h4{margin:0 0 8px;font-size:14px}
.footer ul{list-style:none;padding:0;margin:0;color:var(--muted);font-size:14px}
.footer ul li{margin-bottom:4px}
.copyright{text-align:center;font-size:12px;color:var(--muted);border-top:1px solid var(--border);margin-top:24px;padding-top:16px}

/* Static pages */
.page{max-width:780px;margin:0 auto;padding:48px 20px}
.page h1{font-size:32px;margin:0}
.page h2{margin-top:28px;font-size:20px}
.page p, .page li{color:var(--muted);line-height:1.7}
.form-card{margin-top:24px;background:rgba(30,41,59,.6);border:1px solid var(--border);
  border-radius:14px;padding:24px}
.btn{display:inline-block;margin-top:12px;padding:10px 20px;background:var(--primary);color:#0f172a;
  border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:opacity .2s}
.btn:hover{opacity:.9}
.msg-ok{color:var(--success);font-size:14px;margin-top:8px}
.msg-err{color:var(--danger);font-size:14px;margin-top:8px}