:root{
  --bg:#f7f5ff;--bg2:#efebff;--card:#ffffff;--ink:#1a1633;--mut:#6a6585;--line:#e6e1fa;
  --brand:#5b4df0;--brand-d:#4a3de0;--brand2:#d946ef;--accent:#d946ef;--ok:#16a34a;--warn:#fff3a3;
  --shadow:0 18px 50px rgba(91,77,240,.14);--m1:#e9e4ff;--m2:#ffe6f4;--m3:#e2f0ff;
  --r:14px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0e0c1c;--bg2:#1a1730;--card:#1a1730;--ink:#f1eeff;--mut:#a29cc4;--line:#2d2850;
    --brand:#7b6ff5;--brand-d:#9a90ff;--brand2:#e879f9;--accent:#e879f9;--ok:#4ade80;--warn:#5b4d00;
    --shadow:0 18px 50px rgba(0,0,0,.5);--m1:#251d5a;--m2:#401a3d;--m3:#13294d;
  }
}
:root[data-theme="dark"]{
  --bg:#0e0c1c;--bg2:#1a1730;--card:#1a1730;--ink:#f1eeff;--mut:#a29cc4;--line:#2d2850;
    --brand:#7b6ff5;--brand-d:#9a90ff;--brand2:#e879f9;--accent:#e879f9;--ok:#4ade80;--warn:#5b4d00;
    --shadow:0 18px 50px rgba(0,0,0,.5);--m1:#251d5a;--m2:#401a3d;--m3:#13294d;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;overflow-x:hidden}
img,svg{max-width:100%}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;letter-spacing:-.02em}
h1{font-size:clamp(2rem,5vw,3.3rem);font-weight:800}
h2{font-size:clamp(1.55rem,3.2vw,2.3rem);font-weight:750}
h3{font-size:1.15rem;font-weight:650}
p{margin:0 0 1em}
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
.narrow{max-width:760px}
.sec{padding:72px 0}
.sec.alt{background:var(--bg2)}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);margin-bottom:10px}
.lead{font-size:1.15rem;color:var(--mut);max-width:680px}
.center{text-align:center}.center .lead{margin-left:auto;margin-right:auto}

/* header */
.hdr{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:66px;gap:12px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.2rem;color:var(--ink);letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo svg{width:30px;height:30px}
.nav{display:flex;align-items:center;gap:6px}
.nav a{color:var(--mut);padding:8px 12px;border-radius:9px;font-weight:550;font-size:.95rem}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink);background:var(--bg2);text-decoration:none}
.hdr-cta{display:flex;gap:8px;align-items:center}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:42px;height:42px;color:var(--ink);cursor:pointer}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:11px;font-weight:650;font-size:.97rem;border:1px solid transparent;cursor:pointer;transition:transform .12s,box-shadow .12s,background .12s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 6px 18px color-mix(in srgb,var(--brand) 38%,transparent)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{background:var(--bg2)}
.btn-lg{padding:14px 26px;font-size:1.03rem}
.btn-block{width:100%}

/* hero */
.hero{padding:70px 0 60px;background:radial-gradient(900px 420px at 80% -10%,color-mix(in srgb,var(--brand) 18%,transparent),transparent),radial-gradient(700px 360px at 0% 10%,color-mix(in srgb,var(--accent) 14%,transparent),transparent)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.hero .lead{margin-bottom:26px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.hero-note{font-size:.9rem;color:var(--mut);display:flex;gap:16px;flex-wrap:wrap}
.hero-note span::before{content:"✓ ";color:var(--ok);font-weight:800}
.grad{background:linear-gradient(135deg,var(--brand),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}

/* chat mock */
.mock{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}
.mock-top{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--bg2)}
.dot{width:10px;height:10px;border-radius:50%;background:#ef4444}.dot:nth-child(2){background:#f59e0b}.dot:nth-child(3){background:#22c55e}
.mock-top b{margin-left:6px;font-size:.9rem}
.mock-body{display:grid;grid-template-columns:130px 1fr;min-height:310px}
.mock-side{border-right:1px solid var(--line);padding:12px 10px;background:var(--bg2);font-size:.8rem}
.mock-side div{padding:8px 10px;border-radius:8px;color:var(--mut);margin-bottom:3px}
.mock-side div.on{background:var(--card);color:var(--ink);font-weight:650;box-shadow:0 1px 2px rgba(0,0,0,.08)}
.mock-chat{padding:16px;display:flex;flex-direction:column;gap:10px;font-size:.88rem}
.bub{max-width:82%;padding:9px 13px;border-radius:14px;line-height:1.4}
.bub.v{background:var(--bg2);border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:4px}
.bub.a{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.typing{align-self:flex-start;color:var(--mut);font-size:.78rem}
.pill{display:inline-block;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:99px;background:color-mix(in srgb,var(--ok) 16%,transparent);color:var(--ok)}

/* grids & cards */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--shadow)}
.card p{color:var(--mut);margin:0;font-size:.97rem}
.ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:14px;background:color-mix(in srgb,var(--brand) 13%,transparent);color:var(--brand)}
.ico svg{width:22px;height:22px}
.sec-head{margin-bottom:38px}
.steps{counter-reset:s}
.step{position:relative;padding-top:6px}
.step::before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800;margin-bottom:12px}
.code{background:#0b1226;color:#c7d2fe;border-radius:12px;padding:14px 16px;font:.85rem/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;overflow-x:auto;margin-top:12px;white-space:pre}
.band{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-radius:22px;padding:48px 28px;text-align:center}
.band h2{color:#fff}.band p{color:rgba(255,255,255,.88);max-width:560px;margin:0 auto 22px}
.band .btn-primary{background:#fff;color:#4338ca;box-shadow:none}
.band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.band .btn-ghost:hover{background:rgba(255,255,255,.12)}

/* feature page */
.fblock{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;padding:44px 0;border-top:1px solid var(--line)}
.fblock:first-of-type{border-top:0}
.fblock.rev .ftext{order:2}
.flist{list-style:none;padding:0;margin:16px 0 0;display:grid;gap:9px}
.flist li{padding-left:28px;position:relative;color:var(--mut)}
.flist li::before{content:"";position:absolute;left:0;top:.35em;width:17px;height:17px;border-radius:50%;background:color-mix(in srgb,var(--ok) 18%,transparent)}
.flist li::after{content:"";position:absolute;left:5.5px;top:.62em;width:5px;height:9px;border:solid var(--ok);border-width:0 2px 2px 0;transform:rotate(45deg) scale(.8)}
.tag{display:inline-block;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:99px;background:color-mix(in srgb,var(--brand) 14%,transparent);color:var(--brand);margin-right:6px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:22px;min-height:220px}
.row{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:.9rem}
.row:last-child{border-bottom:0}
.row span{color:var(--mut)}
.bar{height:8px;border-radius:99px;background:var(--bg2);overflow:hidden;margin-top:6px}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--accent));border-radius:99px}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:stretch}
.plan{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px 22px;box-shadow:var(--shadow);position:relative}
.plan.pop{border:2px solid var(--brand);transform:translateY(-8px)}
.plan .badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:.72rem;font-weight:800;letter-spacing:.05em;text-transform:uppercase;padding:5px 13px;border-radius:99px;white-space:nowrap}
.plan h3{font-size:1.2rem;margin-bottom:4px}
.plan .sub{color:var(--mut);font-size:.9rem;min-height:3.4em;margin-bottom:14px}
.price{font-size:2.6rem;font-weight:800;letter-spacing:-.03em;line-height:1}
.price small{font-size:.95rem;font-weight:550;color:var(--mut);letter-spacing:0}
.plan .meta{font-size:.86rem;color:var(--mut);margin:8px 0 18px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.plan ul{list-style:none;padding:0;margin:0 0 22px;display:grid;gap:9px;font-size:.92rem;flex:1}
.plan li{padding-left:24px;position:relative}
.plan li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}
.plan li.pre{font-weight:650;padding-left:0}.plan li.pre::before{content:""}
.cmp-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--card)}
table.cmp{border-collapse:collapse;width:100%;min-width:720px;font-size:.93rem}
.cmp th,.cmp td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:center}
.cmp th:first-child,.cmp td:first-child{text-align:left}
.cmp thead th{background:var(--bg2);font-weight:700;position:sticky;top:0}
.cmp tr.grp td{background:var(--bg2);font-weight:750;font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--mut);text-align:left}
.cmp .y{color:var(--ok);font-weight:800}.cmp .n{color:var(--mut);opacity:.5}
details.faq{border:1px solid var(--line);border-radius:12px;background:var(--card);margin-bottom:10px;padding:0 18px}
details.faq summary{cursor:pointer;font-weight:650;padding:16px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";font-size:1.3rem;line-height:1;color:var(--brand)}
details.faq[open] summary::after{content:"–"}
details.faq p{color:var(--mut);padding-bottom:14px;margin:0}

/* forms / contact */
.form{display:grid;gap:14px}
label{font-weight:600;font-size:.9rem;display:grid;gap:6px}
input,textarea,select{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:11px 13px;width:100%}
input:focus,textarea:focus,select:focus{outline:2px solid color-mix(in srgb,var(--brand) 60%,transparent);outline-offset:1px}
textarea{min-height:130px;resize:vertical}

/* legal */
.prose{max-width:760px}
.prose h2{font-size:1.4rem;margin-top:2em}
.prose h3{margin-top:1.4em}
.prose p,.prose li{color:var(--mut)}
.prose ul{padding-left:1.2em}
.prose li{margin-bottom:.4em}
.prose strong{color:var(--ink)}
.ph{background:var(--warn);padding:0 4px;border-radius:4px;color:inherit}
.legal-meta{font-size:.9rem;color:var(--mut);margin-bottom:28px}
.toc{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:28px}
.toc ol{margin:6px 0 0;padding-left:1.2em;columns:2;column-gap:28px}
.toc a{color:var(--mut)}

/* footer */
.ftr{background:var(--bg2);border-top:1px solid var(--line);padding:56px 0 28px;margin-top:0}
.fgrid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:32px;margin-bottom:34px}
.ftr h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.07em;color:var(--mut);margin-bottom:12px}
.ftr ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.ftr a{color:var(--ink);font-size:.95rem}
.ftr .about{color:var(--mut);font-size:.93rem;max-width:300px;margin-top:12px}
.fbot{border-top:1px solid var(--line);padding-top:20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.88rem;color:var(--mut)}
.page-hero{padding:56px 0 20px}
.notfound{padding:110px 0;text-align:center}

@media (max-width:960px){
  .hero-grid,.fblock{grid-template-columns:1fr}
  .fblock.rev .ftext{order:0}
  .g3{grid-template-columns:repeat(2,1fr)}.g4{grid-template-columns:repeat(2,1fr)}
  .plans{grid-template-columns:repeat(2,1fr)}
  .plan.pop{transform:none}
  .fgrid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .burger{display:grid;place-items:center}
  .nav{position:absolute;left:0;right:0;top:66px;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 16px 16px;display:none}
  .nav.open{display:flex}
  .hdr-cta .btn-ghost,.hdr-cta .btn-primary{padding:7px 12px;font-size:.88rem}
  .sec{padding:54px 0}
  .g2,.g3,.g4,.plans{grid-template-columns:1fr}
  .mock-body{grid-template-columns:1fr}.mock-side{display:none}
  .toc ol{columns:1}
  .fgrid{grid-template-columns:1fr}
}
.note{padding:12px 14px;border-radius:10px;font-size:.93rem;border:1px solid var(--line);background:var(--bg2)}
.note.ok{border-color:var(--ok);color:var(--ok)}
.note.err{border-color:#ef4444;color:#ef4444}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:500;font-size:.9rem;color:var(--mut)}
.check input{width:auto;margin-top:4px}
.hp{position:absolute;left:-9999px;height:0;overflow:hidden}
.trial-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:start}
@media (max-width:960px){.trial-grid{grid-template-columns:1fr}}
.grid>*,.hero-grid>*,.trial-grid>*,.fblock>*{min-width:0}
.code{white-space:pre-wrap;word-break:break-all}

/* ---- original QuikaChat look: soft gradient bg, floating pill header, pill buttons ---- */
body{font-family:"Plus Jakarta Sans",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg)}
body:before{content:"";position:fixed;inset:0;z-index:-1;background:radial-gradient(700px 500px at 8% 0%,var(--m1),transparent 70%),radial-gradient(600px 500px at 95% 8%,var(--m2),transparent 70%),radial-gradient(800px 600px at 50% 100%,var(--m3),transparent 70%)}
.sec.alt,.ftr{background:color-mix(in srgb,var(--card) 45%,transparent)}
.hero{background:none}
.hdr{top:12px;background:none;border:0;backdrop-filter:none;padding:0 14px}
.hdr .wrap{position:relative;max-width:1100px;height:auto;margin-top:12px;padding:8px 10px 8px 18px;border-radius:999px;background:color-mix(in srgb,var(--card) 80%,transparent);backdrop-filter:blur(14px);border:1px solid var(--line);box-shadow:var(--shadow)}
.logo img{width:34px;height:34px;object-fit:contain;border-radius:10px}
.logo{font-size:1.2rem}
.nav a{border-radius:999px}
.btn{border-radius:999px;font-weight:700}
.btn-primary{box-shadow:none}
.btn-sm{padding:8px 14px}
.btn-lg{padding:15px 30px}
.card,.plan,.panel,.mock,.cmp-wrap{border-radius:26px}
.card,.plan{background:color-mix(in srgb,var(--card) 80%,transparent);backdrop-filter:blur(10px)}
.plan.pop{border-color:var(--brand)}
h1,h2{letter-spacing:-.04em;font-weight:800}
.themebtn{width:40px;height:40px;padding:0;border-radius:50%;border:1px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer;font-size:1rem}
.band{border-radius:30px}
@media (max-width:760px){
  .nav{top:calc(100% + 8px);border:1px solid var(--line);border-radius:22px;background:var(--bg);box-shadow:var(--shadow)}
}

/* qc260 */
@media (max-width:400px){.hdr .logo span{display:none}}