:root {
  --bg: #05050a;
  --ink: #e600b5;
  --ink-soft: #b90094;
  --vio: #7a5cff;
  --glow: #5cf6ff;
  --text: #f5f6f7;
  --muted: #9aa0a6;
  --card: #0b0b14;
  --border: rgba(255,255,255,0.06);
  --ring: 0 0 25px rgba(230,0,181,.45), 0 0 50px rgba(92,246,255,.15);
  --ease: cubic-bezier(.22,.61,.36,1);
  --radius: 18px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:linear-gradient(180deg,#06060e,#05050a 35%,#06060e);color:var(--text);font-family:"Urbanist",system-ui,sans-serif;line-height:1.6}
a{color:var(--glow);text-decoration:none}a:hover{filter:brightness(1.15)}
img{display:block;max-width:100%;height:auto}
.wrap{max-width:1100px;margin:0 auto;padding:28px}
header.nav{background:linear-gradient(180deg,rgba(5,5,10,.92),rgba(5,5,10,.58));border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;backdrop-filter:blur(12px)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 28px;max-width:1100px;margin:0 auto}
.brand{font-weight:800;font-size:20px;font-family:'IBM Plex Mono',monospace;color:var(--ink)}
nav.kbd{display:flex;gap:22px;font-family:'IBM Plex Mono',monospace;font-size:14px}
nav.kbd a.active{color:var(--ink)}
.cta{display:inline-flex;align-items:center;gap:10px;padding:12px 28px;background:linear-gradient(90deg,var(--ink),var(--ink-soft));color:#fff;border-radius:999px;font-weight:700;box-shadow:var(--ring);border:none;cursor:pointer;font-size:16px;transition:transform .15s var(--ease)}
.cta:hover{transform:scale(1.03);filter:brightness(1.1)}
.panel{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.02));border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 20px 60px rgba(0,0,0,.45)}
.section-title{font-size:28px;font-weight:800;margin:0 0 14px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;margin-top:32px}
.card{padding:32px;position:relative;overflow:hidden;transition:transform .2s var(--ease)}
.card:hover{transform:translateY(-4px)}
.thumb{position:relative;height:165px;border-radius:14px;overflow:hidden;margin-bottom:12px;background:#0a1220;display:flex;align-items:center;justify-content:center}
.thumb img{max-height:100%;object-fit:contain}
.tag{display:inline-block;padding:6px 14px;border:1px solid rgba(255,255,255,.14);border-radius:999px;font-size:13px;color:var(--muted)}
.muted{color:var(--muted);font-size:14px}
.hero-title{font-size:clamp(34px,6.2vw,64px);font-weight:800;background:conic-gradient(from 200deg,var(--text),#c8c9ff 25%,#bff9ff 40%,var(--text) 60%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{color:var(--muted);font-size:clamp(16px,2.2vw,20px);margin-top:10px;max-width:68ch;margin-left:auto;margin-right:auto}
/* Pricing */
.tier{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px}
.tier.featured{border:2px solid var(--ink);box-shadow:0 0 30px rgba(230,0,181,0.15)}
.tier-label{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:2px;margin-bottom:8px}
.tier-price{font-size:36px;font-weight:800;color:var(--glow);margin:16px 0 4px}
.tier-note{color:var(--muted);font-size:14px;margin-bottom:20px}
.tier ul{list-style:none;padding:0}
.tier li{padding:8px 0;border-top:1px solid var(--border);color:#ccc;font-size:14px}
.popular-badge{position:absolute;top:16px;right:16px;background:var(--ink);color:#fff;font-size:11px;font-weight:700;padding:4px 12px;border-radius:999px;letter-spacing:1px}
/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.idcard{display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:center;padding:18px;text-align:left}
.idcard img{border-radius:14px;box-shadow:0 8px 24px rgba(230,0,181,.28)}
.idcard .name{font-weight:800;margin:0 0 6px}
.idcard .role{color:var(--muted);margin:0 0 8px}
form.contact-form{display:grid;gap:12px;padding:18px}
input,textarea{background:#0b0b14;border:1px solid rgba(255,255,255,.09);color:var(--text);padding:12px 14px;border-radius:12px;width:100%;font-family:inherit;font-size:15px}
textarea{min-height:120px;resize:vertical}
label{font-family:'IBM Plex Mono',monospace;font-size:14px}
/* Stats grid */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;text-align:left;max-width:900px;margin:0 auto}
.stat-num{font-size:36px;font-weight:800;color:var(--ink);margin-bottom:4px}
.stat-label{color:var(--muted);font-size:14px}
/* Detector */
.detector-box{background:var(--card);border:2px solid var(--vio);border-radius:var(--radius);padding:40px;max-width:700px;margin:0 auto}
.detector-textarea{width:100%;min-height:200px;background:#0b0b14;border:1px solid rgba(255,255,255,.09);color:var(--text);padding:16px;border-radius:12px;font-family:'IBM Plex Mono',monospace;font-size:14px;resize:vertical}
.result-card{margin-top:24px;padding:24px;border-radius:var(--radius);text-align:center}
.result-card.human{background:rgba(0,255,100,.08);border:1px solid rgba(0,255,100,.3)}
.result-card.ai{background:rgba(255,0,80,.08);border:1px solid rgba(255,0,80,.3)}
.result-card.mixed{background:rgba(255,200,0,.08);border:1px solid rgba(255,200,0,.3)}
.confidence-bar{height:8px;border-radius:4px;background:#1a1a2e;margin-top:12px;overflow:hidden}
.confidence-fill{height:100%;border-radius:4px;transition:width .5s var(--ease)}
/* Footer */
footer{text-align:center;padding:40px 28px;color:var(--muted);border-top:1px solid var(--border)}
footer a{color:var(--muted)}footer a:hover{color:var(--glow)}
/* Responsive */
@media(max-width:768px){
  .contact-grid{grid-template-columns:1fr}
  .idcard{grid-template-columns:1fr;text-align:center}
  .idcard img{margin:0 auto}
  .nav-inner{flex-direction:column;gap:8px;padding:12px 16px}
  nav.kbd{gap:14px;font-size:13px;flex-wrap:wrap;justify-content:center}
  .wrap{padding:16px}
  .cards{grid-template-columns:1fr;gap:16px}
  .hero-title{font-size:28px}
  .hero-sub{font-size:15px}
  .section-title{font-size:22px}
  .tier{padding:24px}
  .tier-price{font-size:28px}
  .detector-box{padding:20px}
  .detector-textarea{min-height:150px;font-size:13px}
  .stats{grid-template-columns:1fr 1fr;gap:16px}
  .stat-num{font-size:28px}
  .cta{padding:10px 22px;font-size:15px}
  .card{padding:24px}
  .thumb{height:140px}
  form.contact-form{padding:14px}
}