:root{
  --bg:#0a0b12;
  --bg-2:#0f1120;
  --card:#161827;
  --card-2:#1c1f33;
  --line:rgba(255,255,255,.08);
  --text:#eef0f7;
  --muted:#a2a7bd;
  --brand:#7c5cff;
  --brand-2:#22d3ee;
  --accent:#ff7ac6;
  --user:#6d5cff;
  --radius:18px;
  --shadow:0 24px 60px -20px rgba(0,0,0,.7);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Inter',system-ui,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.15;margin:0}

/* background orbs */
.bg-orbs{position:fixed;inset:0;z-index:-1;overflow:hidden}
.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.orb-1{width:520px;height:520px;background:var(--brand);top:-140px;left:-120px}
.orb-2{width:460px;height:460px;background:var(--brand-2);top:20%;right:-140px;opacity:.35}
.orb-3{width:420px;height:420px;background:var(--accent);bottom:-160px;left:30%;opacity:.28}

/* nav */
.nav{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(20px,5vw,64px);
  backdrop-filter:blur(14px);
  background:rgba(10,11,18,.6);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem}
.brand-mark{color:var(--brand-2);font-size:1.2rem}
.nav-links{display:flex;gap:28px;font-size:.95rem;color:var(--muted)}
.nav-links a:hover{color:var(--text)}
.nav-cta{padding:9px 18px;font-size:.9rem}
@media(max-width:720px){.nav-links{display:none}}

/* buttons */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:999px;font-weight:600;font-size:1rem;
  cursor:pointer;border:1px solid transparent;transition:transform .15s ease,box-shadow .2s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(120deg,var(--brand),var(--accent));color:#fff;box-shadow:0 14px 30px -10px rgba(124,92,255,.7)}
.btn-ghost{background:rgba(255,255,255,.05);border-color:var(--line);color:var(--text)}

/* hero */
.hero{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  padding:clamp(48px,8vw,110px) clamp(20px,5vw,64px);
  max-width:1240px;margin:0 auto;
}
.pill{
  display:inline-block;padding:7px 16px;border-radius:999px;font-size:.82rem;font-weight:600;
  background:rgba(124,92,255,.14);color:#c9bcff;border:1px solid rgba(124,92,255,.3);margin-bottom:22px;
}
.hero h1{font-size:clamp(2.4rem,5.2vw,3.9rem);font-weight:800;letter-spacing:-.02em}
.grad{background:linear-gradient(120deg,var(--brand-2),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--muted);font-size:1.15rem;max-width:520px;margin:20px 0 30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:36px;margin-top:44px;flex-wrap:wrap}
.hero-stats strong{display:block;font-size:1.7rem;font-weight:800;background:linear-gradient(120deg,#fff,#b9bed6);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats span{color:var(--muted);font-size:.88rem}
@media(max-width:900px){.hero{grid-template-columns:1fr;gap:40px}}

/* chat window */
.chat-window{
  background:linear-gradient(180deg,var(--card),var(--bg-2));
  border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);
  overflow:hidden;display:flex;flex-direction:column;
}
.hero-chat .chat-window{transform:rotate(.6deg)}
.chat-head{display:flex;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.02)}
.avatar{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(120deg,var(--brand),var(--accent));color:#fff;font-size:1.1rem;flex:none;
}
.chat-head-info{display:flex;flex-direction:column}
.chat-head-info strong{font-size:.98rem}
.status{font-size:.8rem;color:#7fe3b0;display:flex;align-items:center;gap:6px}
.dot{width:8px;height:8px;border-radius:50%;background:#37d67a;box-shadow:0 0 0 3px rgba(55,214,122,.2)}
.chat-body{padding:20px 18px;display:flex;flex-direction:column;gap:12px;min-height:220px;max-height:380px;overflow-y:auto}
.demo-window .chat-body{height:400px}
.msg{max-width:82%;display:flex}
.msg p{margin:0;padding:11px 15px;border-radius:16px;font-size:.95rem}
.msg.bot{align-self:flex-start}
.msg.bot p{background:var(--card-2);border:1px solid var(--line);border-bottom-left-radius:5px}
.msg.user{align-self:flex-end}
.msg.user p{background:linear-gradient(120deg,var(--brand),var(--user));color:#fff;border-bottom-right-radius:5px}
.chat-input{display:flex;align-items:center;gap:10px;padding:14px 16px;border-top:1px solid var(--line);background:rgba(255,255,255,.02)}
.fake-input{flex:1;color:var(--muted);font-size:.92rem}
.chat-input.live input{flex:1;background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:999px;padding:11px 16px;color:var(--text);font-size:.95rem;font-family:inherit;outline:none}
.chat-input.live input:focus{border-color:var(--brand)}
.send-btn{
  width:40px;height:40px;border-radius:50%;border:none;cursor:pointer;flex:none;
  background:linear-gradient(120deg,var(--brand),var(--accent));color:#fff;font-size:1rem;
  display:grid;place-items:center;transition:transform .15s ease;
}
.send-btn:hover{transform:scale(1.08)}

/* typing indicator */
.typing p{display:flex;gap:4px;align-items:center}
.typing span{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite}
.typing span:nth-child(2){animation-delay:.2s}
.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,60%,100%{opacity:.3}30%{opacity:1}}

/* sections */
.section{max-width:1160px;margin:0 auto;padding:clamp(56px,8vw,96px) clamp(20px,5vw,64px)}
.section-head{text-align:center;max-width:640px;margin:0 auto 48px}
.eyebrow{color:var(--brand-2);font-weight:700;font-size:.85rem;letter-spacing:.08em;text-transform:uppercase}
.section-head h2{font-size:clamp(1.8rem,4vw,2.7rem);font-weight:800;margin:12px 0}
.section-head p{color:var(--muted);font-size:1.08rem}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}
.card{
  background:linear-gradient(180deg,var(--card),var(--bg-2));
  border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;
  transition:transform .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-6px);border-color:rgba(124,92,255,.5)}
.card-icon{font-size:2rem;margin-bottom:14px}
.card h3{font-size:1.2rem;margin-bottom:8px}
.card p{color:var(--muted);font-size:.95rem;margin:0 0 18px}
.card-link{background:none;border:none;color:var(--brand-2);font-weight:600;font-size:.95rem;cursor:pointer;padding:0;font-family:inherit}
.card-link:hover{color:var(--accent)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}
.step{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px}
.step-num{
  display:grid;place-items:center;width:42px;height:42px;border-radius:12px;font-weight:800;
  background:linear-gradient(120deg,var(--brand),var(--accent));color:#fff;margin-bottom:16px;
}
.step h3{font-size:1.15rem;margin-bottom:8px}
.step p{color:var(--muted);margin:0}

/* demo */
.demo-shell{display:grid;grid-template-columns:200px 1fr;gap:22px;max-width:940px;margin:0 auto}
.demo-tabs{display:flex;flex-direction:column;gap:10px}
.tab{
  text-align:left;padding:14px 16px;border-radius:14px;font-size:.98rem;font-weight:500;cursor:pointer;
  background:rgba(255,255,255,.03);border:1px solid var(--line);color:var(--muted);font-family:inherit;
  transition:all .18s ease;
}
.tab:hover{color:var(--text);border-color:rgba(124,92,255,.4)}
.tab.active{background:rgba(124,92,255,.15);color:#fff;border-color:rgba(124,92,255,.6)}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:940px;margin:22px auto 0}
.chip{
  padding:9px 16px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--muted);font-size:.88rem;cursor:pointer;font-family:inherit;transition:all .15s ease;
}
.chip:hover{color:#fff;border-color:var(--brand);background:rgba(124,92,255,.12)}
@media(max-width:760px){.demo-shell{grid-template-columns:1fr}.demo-tabs{flex-direction:row;flex-wrap:wrap}.tab{flex:1;min-width:120px;text-align:center}}

/* cta */
.cta{text-align:center;padding:clamp(60px,9vw,110px) 24px;max-width:720px;margin:0 auto}
.cta h2{font-size:clamp(1.9rem,4vw,2.8rem);font-weight:800}
.cta p{color:var(--muted);font-size:1.12rem;margin:14px 0 30px}

/* footer */
.footer{
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;
  padding:28px clamp(20px,5vw,64px);border-top:1px solid var(--line);color:var(--muted);font-size:.9rem;
}
.footer span:first-child{font-weight:700;color:var(--text)}

/* scrollbar */
.chat-body::-webkit-scrollbar{width:6px}
.chat-body::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12);border-radius:3px}

.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}