/* Chatopia website. Same palette as the app: night #0B0B14, violet #7C5CFF -> magenta #FF4FA3, warm spark #FFB84D. */
@font-face{font-family:"Inter";src:url("../fonts/inter-latin-wght.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
:root{
  --bg:#0B0B14;--surface:rgba(255,255,255,.045);--surface-2:rgba(255,255,255,.075);--stroke:rgba(255,255,255,.10);
  --text:#F4F3FA;--muted:rgba(244,243,250,.70);--faint:rgba(244,243,250,.46);
  --violet:#7C5CFF;--magenta:#FF4FA3;--spark:#FFB84D;--ok:#4ADE9A;--err:#FF6B7A;
  --grad:linear-gradient(135deg,#7C5CFF,#FF4FA3);
  --r:22px;--max:1120px;
}
*{box-sizing:border-box}
html{color-scheme:dark;-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--text);font:400 17px/1.65 "Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  background-image:radial-gradient(1000px 520px at 10% -6%,rgba(124,92,255,.20),transparent 66%),radial-gradient(820px 480px at 100% 0,rgba(255,79,163,.12),transparent 62%);
  background-repeat:no-repeat}
img,svg{max-width:100%;display:block}
a{color:inherit}
.wrap{width:min(var(--max),100% - 40px);margin-inline:auto}
.skip{position:absolute;left:-999px;top:8px;background:#fff;color:#000;padding:10px 14px;border-radius:10px;z-index:99}
.skip:focus{left:12px}
:focus-visible{outline:2px solid var(--violet);outline-offset:3px;border-radius:8px}

/* header */
.bar{position:sticky;top:0;z-index:30;background:rgba(11,11,20,.82);backdrop-filter:saturate(1.3) blur(14px);-webkit-backdrop-filter:saturate(1.3) blur(14px);border-bottom:1px solid var(--stroke)}
.bar .wrap{display:flex;align-items:center;gap:20px;min-height:66px}
.brand{display:flex;align-items:center;text-decoration:none;margin-right:auto}
.brand img{height:30px;width:auto}
.nav{display:flex;align-items:center;gap:6px}
.nav a{text-decoration:none;color:var(--muted);font-weight:500;font-size:15px;padding:9px 13px;border-radius:12px;transition:color .15s,background .15s}
.nav a:hover,.nav a[aria-current="page"]{color:var(--text);background:var(--surface-2)}
.menu{display:none;background:none;border:1px solid var(--stroke);color:var(--text);width:44px;height:44px;border-radius:14px;cursor:pointer;align-items:center;justify-content:center}
.menu span,.menu span::before,.menu span::after{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative;content:""}
.menu span::before{position:absolute;top:-6px}.menu span::after{position:absolute;top:6px}
@media (max-width:720px){
  .menu{display:inline-flex}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:2px;padding:10px 20px 16px;background:rgba(11,11,20,.97);border-bottom:1px solid var(--stroke)}
  .nav.open{display:flex}
  .nav a{padding:13px 12px;font-size:16px}
}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 26px;border-radius:18px;font-weight:600;font-size:16px;text-decoration:none;border:1px solid transparent;transition:transform .15s,background .15s,border-color .15s}
.btn.primary{background:var(--grad);color:#fff;box-shadow:0 10px 30px -12px rgba(124,92,255,.75)}
.btn.primary:hover{transform:translateY(-1px)}
.btn.ghost{background:var(--surface);border-color:var(--stroke);color:var(--text)}
.btn.ghost:hover{background:var(--surface-2)}
.btn[aria-disabled="true"]{cursor:default;background:var(--surface);border:1px dashed rgba(255,255,255,.22);color:var(--muted);box-shadow:none}
.btn[aria-disabled="true"]:hover{transform:none}
.pulse{width:9px;height:9px;border-radius:50%;background:var(--spark)}

/* hero */
.hero{padding:clamp(56px,9vw,120px) 0 clamp(40px,6vw,72px)}
.hero .wrap{position:relative}
.hero-mark{position:absolute;right:clamp(0px,3vw,48px);top:6px;width:clamp(220px,26vw,340px);height:auto;opacity:.95}
@media (max-width:1000px){.hero-mark{display:none}}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--spark);margin:0 0 18px}
h1{font-size:clamp(40px,7.4vw,80px);line-height:1.02;letter-spacing:-.04em;font-weight:800;margin:0;text-wrap:balance}
.lead{font-size:clamp(18px,2.2vw,21px);color:var(--muted);max-width:640px;margin:24px 0 0;text-wrap:pretty}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:clamp(36px,6vw,64px);max-width:860px}
.chip{display:inline-flex;align-items:center;gap:9px;padding:9px 16px 9px 12px;border-radius:999px;border:1px solid var(--stroke);background:var(--surface);font-size:15px;font-weight:500;color:var(--muted)}
.chip.on{border-color:var(--violet);background:rgba(124,92,255,.20);color:var(--text)}

/* sections */
section{padding:clamp(48px,7vw,92px) 0}
.alt{background:rgba(255,255,255,.025);border-block:1px solid var(--stroke)}
h2{font-size:clamp(28px,4.4vw,46px);line-height:1.08;letter-spacing:-.03em;font-weight:800;margin:0;text-wrap:balance}
.sub{color:var(--muted);max-width:620px;margin:16px 0 0;font-size:18px}
.grid{display:grid;gap:16px;margin-top:40px}
.g3{grid-template-columns:repeat(3,1fr)}
@media (max-width:900px){.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.g3{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--stroke);border-radius:var(--r);padding:26px}
.card h3{font-size:19px;letter-spacing:-.015em;margin:18px 0 8px;font-weight:700}
.card p{margin:0;color:var(--muted);font-size:16px}
.ico{width:46px;height:46px;border-radius:15px;background:rgba(124,92,255,.16);display:grid;place-items:center}
.ico svg{width:24px;height:24px;stroke:#C9BDFF;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.step{counter-increment:s;position:relative}
.step::before{content:counter(s);display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--grad);font-weight:800;color:#fff;margin-bottom:6px}
.steps{counter-reset:s}
.band{border:1px solid var(--stroke);border-radius:30px;padding:clamp(28px,5vw,56px);background:linear-gradient(135deg,rgba(124,92,255,.16),rgba(255,79,163,.10))}
.ticks{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:12px;grid-template-columns:repeat(3,1fr)}
@media (max-width:820px){.ticks{grid-template-columns:1fr}}
.ticks li{display:flex;gap:12px;align-items:flex-start;color:var(--text);font-weight:500}
.ticks svg{flex:none;width:22px;height:22px;margin-top:2px;stroke:var(--ok);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:28px}
.help-band{display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between}

/* footer */
footer{border-top:1px solid var(--stroke);padding:48px 0 56px;color:var(--muted);font-size:15px}
.foot{display:flex;flex-wrap:wrap;gap:36px;justify-content:space-between}
.foot img{height:28px;width:auto;margin-bottom:14px}
.foot p{margin:0;max-width:320px}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.foot a{text-decoration:none}.foot a:hover{color:var(--text);text-decoration:underline}
.foot h4{margin:0 0 12px;font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint)}
.legalline{margin-top:36px;padding-top:22px;border-top:1px solid var(--stroke);color:var(--faint);font-size:14px;display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}

/* document pages (privacy, terms, help) */
.doc-head{padding:clamp(44px,7vw,84px) 0 22px}
.doc-head h1{font-size:clamp(34px,5.6vw,58px)}
.meta{color:var(--faint);font-size:15px;margin:14px 0 0}
.doc{display:grid;grid-template-columns:250px minmax(0,1fr);gap:56px;padding-bottom:80px;align-items:start}
@media (max-width:900px){.doc{grid-template-columns:1fr;gap:26px}}
.toc{position:sticky;top:92px;background:var(--surface);border:1px solid var(--stroke);border-radius:var(--r);padding:18px 18px 14px}
@media (max-width:900px){.toc{position:static}}
.toc h2{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin:0 0 10px;font-weight:700}
.toc ol{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.toc a{display:block;text-decoration:none;color:var(--muted);font-size:15px;padding:7px 10px;border-radius:10px}
.toc a:hover{background:var(--surface-2);color:var(--text)}
.prose{max-width:720px}
.prose .intro{font-size:19px;color:var(--text);margin:0 0 8px}
.prose h2{font-size:26px;letter-spacing:-.02em;margin:48px 0 14px;font-weight:700}
.prose p{color:var(--muted);margin:0 0 16px}
.prose ul{color:var(--muted);padding-left:22px;margin:0 0 18px}
.prose li{margin:0 0 10px;padding-left:4px}
.prose li::marker{color:var(--violet)}
.prose a{color:#C9BDFF;text-underline-offset:3px}
.prose strong{color:var(--text)}

.dcards{display:grid;gap:12px;margin:6px 0 24px}
.dcard{background:var(--surface);border:1px solid var(--stroke);border-radius:18px;padding:18px 20px}
.dcard h3{margin:0 0 10px;font-size:17px;color:var(--text);letter-spacing:-.01em}
.dcard dl{margin:0;display:grid;gap:8px}
.dcard dl div{display:grid;grid-template-columns:120px 1fr;gap:12px}
@media (max-width:560px){.dcard dl div{grid-template-columns:1fr;gap:2px}}
.dcard dt{color:var(--faint);font-size:14px;font-weight:600}
.dcard dd{margin:0;color:var(--muted);font-size:15.5px;line-height:1.55}
.steps-list{color:var(--muted);padding-left:22px;margin:0 0 18px}.steps-list li{margin:0 0 10px;padding-left:4px}.steps-list strong{color:var(--text)}
.steps-list li::marker{color:var(--violet);font-weight:700}
/* help */
.search{position:relative;max-width:560px;margin-top:26px}
.search input{width:100%;height:56px;border-radius:18px;border:1px solid var(--stroke);background:var(--surface);color:var(--text);font:inherit;padding:0 18px 0 52px}
.search input::placeholder{color:var(--faint)}
.search svg{position:absolute;left:18px;top:17px;width:22px;height:22px;stroke:var(--faint);fill:none;stroke-width:2;stroke-linecap:round}
.group{margin-top:44px}
.group h2{font-size:22px;margin:0 0 16px}
details{background:var(--surface);border:1px solid var(--stroke);border-radius:18px;margin:0 0 10px;transition:background .15s}
details[open]{background:var(--surface-2)}
summary{list-style:none;cursor:pointer;padding:18px 54px 18px 20px;font-weight:600;position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"";position:absolute;right:22px;top:50%;width:10px;height:10px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:translateY(-70%) rotate(45deg);transition:transform .2s}
details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.ans{padding:0 20px 8px;color:var(--muted)}
.ans p{margin:0 0 14px}.ans ul{margin:0 0 14px;padding-left:22px}.ans li{margin:0 0 8px}
.empty{display:none;color:var(--muted);margin-top:30px}

/* auth result pages */
.center{min-height:calc(100vh - 66px);display:grid;place-items:center;padding:40px 0}
.panel{width:min(520px,100% - 40px);margin-inline:auto;background:var(--surface);border:1px solid var(--stroke);border-radius:28px;padding:clamp(26px,5vw,40px);text-align:center}
.panel h1{font-size:30px;letter-spacing:-.025em;line-height:1.15;margin:18px 0 10px}
.panel p{color:var(--muted);margin:0}
.badge{width:64px;height:64px;border-radius:50%;margin-inline:auto;display:grid;place-items:center;background:rgba(74,222,154,.16)}
.badge svg{width:30px;height:30px;stroke:var(--ok);fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.badge.warn{background:rgba(255,184,77,.16)}.badge.warn svg{stroke:var(--spark)}
.badge.bad{background:rgba(255,107,122,.16)}.badge.bad svg{stroke:var(--err)}
form{text-align:left;margin-top:24px;display:grid;gap:14px}
label{font-size:14px;font-weight:600;color:var(--muted);display:block;margin-bottom:6px}
input[type=password]{width:100%;height:54px;border-radius:16px;border:1px solid var(--stroke);background:var(--surface);color:var(--text);font:inherit;padding:0 16px}
input[type=password]:focus{border-color:var(--violet);outline:none}
.msg{min-height:22px;font-size:15px;margin:0}.msg.bad{color:var(--err)}.msg.ok{color:var(--ok)}
.panel .btn{margin-top:20px}
form .btn{margin-top:0;width:100%}
.hide{display:none!important}

/* gentle reveal, only when JS is on and the visitor hasn't asked for less motion */
@media (prefers-reduced-motion:no-preference){
  .js .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
  .js .reveal.in{opacity:1;transform:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}