:root{
  --bg:#0b0a17; --bg2:#12102a; --panel:#171433; --panel2:#1d1940;
  --ink:#eceafd; --muted:#a29fc7; --line:#2b2752;
  --violet:#7c5cff; --teal:#22d3ee; --pink:#f472b6;
  --radius:18px; --max:1120px;
  font-synthesis:none;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:
    radial-gradient(900px 600px at 85% -10%, rgba(124,92,255,.22), transparent 60%),
    radial-gradient(700px 500px at 5% 10%, rgba(34,211,238,.14), transparent 55%),
    var(--bg);
  color:var(--ink);
  font-family:"Segoe UI",Inter,system-ui,-apple-system,sans-serif;
  line-height:1.6; -webkit-font-smoothing:antialiased;
}
h1,h2,h3{line-height:1.15; margin:0 0 .4em}
a{color:inherit}
.sr-only,.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:var(--violet);color:#fff;padding:8px 14px;border-radius:8px;z-index:99}
.grad{background:linear-gradient(90deg,var(--violet),var(--teal));-webkit-background-clip:text;background-clip:text;color:transparent}
.grad2{background:linear-gradient(90deg,var(--teal),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}

/* NAV */
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;
  max-width:var(--max);margin:0 auto;padding:18px 22px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;
  background:var(--panel);border:1px solid var(--line)}
.brand-txt{font-weight:600;font-size:19px;letter-spacing:.2px}
.brand-txt b{color:var(--teal);font-weight:800}
.brand-txt i{display:block;font-style:normal;font-size:11px;color:var(--muted);letter-spacing:1.5px;text-transform:uppercase}
.nav-links{display:flex;gap:22px;align-items:center;font-size:15px}
.nav-links a{text-decoration:none;color:var(--muted);transition:.2s}
.nav-links a:hover{color:var(--ink)}
.nav-links .ext{color:var(--teal);font-weight:600}

/* HERO */
.hero{max-width:var(--max);margin:20px auto 0;padding:40px 22px 20px;
  display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.eyebrow{letter-spacing:3px;font-size:12px;color:var(--teal);margin:0 0 12px}
.hero h1{font-size:clamp(34px,5vw,58px);font-weight:800;letter-spacing:-1px}
.lede{color:var(--muted);font-size:18px;max-width:46ch;margin:18px 0 26px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;border:0;cursor:pointer;
  font:inherit;font-weight:600;padding:13px 22px;border-radius:12px;text-decoration:none;transition:.2s;font-size:15px}
.btn.primary{background:linear-gradient(90deg,var(--violet),var(--teal));color:#0a0918}
.btn.primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn.primary:disabled{opacity:.4;cursor:not-allowed;transform:none;filter:none}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--violet);background:rgba(124,92,255,.1)}
.trust{list-style:none;display:flex;gap:20px;flex-wrap:wrap;padding:0;margin:24px 0 0;color:var(--muted);font-size:14px}
.hero-visual{position:relative;height:280px}
.orb{position:absolute;inset:0;margin:auto;width:220px;height:220px;border-radius:50%;
  background:conic-gradient(from 0deg,var(--violet),var(--teal),var(--pink),var(--violet));
  filter:blur(6px);opacity:.75;animation:spin 14s linear infinite}
.bars{position:absolute;inset:0;margin:auto;width:180px;height:120px;border-radius:16px;
  background:var(--panel);border:1px solid var(--line);
  background-image:repeating-linear-gradient(90deg,var(--teal) 0 3px,transparent 3px 11px);
  background-size:100% 60%;background-position:center;background-repeat:no-repeat;
  box-shadow:0 20px 60px rgba(0,0,0,.5)}
@keyframes spin{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){.orb{animation:none}}

/* STUDIO */
.studio{max-width:960px;margin:30px auto;padding:0 22px}
.dropzone{border:2px dashed var(--line);border-radius:var(--radius);background:var(--panel);
  padding:56px 20px;text-align:center;cursor:pointer;transition:.2s}
.dropzone:hover,.dropzone:focus,.dropzone.drag{border-color:var(--teal);background:var(--panel2);outline:none}
.dz-icon{font-size:52px}
.dz-title{font-size:22px;font-weight:700;margin:8px 0 4px}
.dz-sub{color:var(--muted)}
.dz-sub .link{color:var(--teal);text-decoration:underline}
.workspace{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-top:8px}
.track{font-weight:600;margin-bottom:12px;color:var(--teal);word-break:break-all}
.wave{width:100%;height:150px;background:var(--bg2);border-radius:12px;display:block}
.controls{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:18px 0}
.mode{display:flex;gap:8px;flex-wrap:wrap}
.chip{background:var(--bg2);border:1px solid var(--line);color:var(--muted);
  padding:9px 15px;border-radius:999px;cursor:pointer;font:inherit;font-size:14px;transition:.2s}
.chip:hover{color:var(--ink)}
.chip.active{background:linear-gradient(90deg,var(--violet),var(--teal));color:#0a0918;border-color:transparent;font-weight:600}
.sliders{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:6px 0 18px}
.sliders label{display:flex;flex-direction:column;gap:6px;font-size:14px;color:var(--muted)}
.sliders input[type=range]{accent-color:var(--violet);width:100%}
.sliders span{color:var(--teal);font-weight:600}
.actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.status{color:var(--muted);font-size:14px}

/* SECTIONS */
section h2{text-align:center;font-size:clamp(26px,3.4vw,38px);font-weight:800;margin-top:10px}
.features,.how,.faq{max-width:var(--max);margin:70px auto;padding:0 22px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.2s}
.card:hover{transform:translateY(-4px);border-color:var(--violet)}
.ci{font-size:30px;margin-bottom:10px}
.card h3{font-size:19px}
.card p{color:var(--muted);margin:0;font-size:15px}
.steps{list-style:none;padding:0;max-width:720px;margin:34px auto 0;display:grid;gap:16px}
.steps li{display:flex;gap:16px;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 20px}
.steps span{flex:0 0 34px;height:34px;display:grid;place-items:center;border-radius:50%;
  background:linear-gradient(90deg,var(--violet),var(--teal));color:#0a0918;font-weight:800}
.steps p{margin:0;color:var(--muted)}
.steps b{color:var(--ink)}
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:4px 20px;margin:12px auto;max-width:760px}
.faq summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--teal);font-size:20px}
.faq details[open] summary::after{content:"–"}
.faq p{color:var(--muted);margin:0 0 16px}

/* FOOTER */
.footer{border-top:1px solid var(--line);margin-top:60px;padding:34px 22px;text-align:center;color:var(--muted)}
.f-brand b{color:var(--teal)}
.f-brand a{color:var(--teal);text-decoration:none}
.f-links{display:flex;gap:20px;justify-content:center;margin:14px 0;flex-wrap:wrap}
.f-links a{color:var(--muted);text-decoration:none}
.f-links a:hover{color:var(--ink)}
.f-note{font-size:13px;opacity:.8}

@media(max-width:860px){
  .hero{grid-template-columns:1fr}
  .hero-visual{display:none}
  .grid{grid-template-columns:1fr 1fr}
  .sliders{grid-template-columns:1fr}
  .nav-links a:not(.ext){display:none}
}
@media(max-width:520px){.grid{grid-template-columns:1fr}}

/* cross-link header buttons hover (CSP-safe) */
.xlink{transition:border-color .2s}
.xlink:hover{border-color:#7c5cff!important}