:root{
  --purple:#7c5cff; --purple-d:#6343f0; --purple-l:#efeaff;
  --pink:#ff6fb5; --pink-l:#ffe8f3;
  --green:#3ccf8e; --green-l:#e3f9ee;
  --amber:#f5a524; --amber-l:#fff4df;
  --red:#ef4f6b; --red-l:#ffe9ed;
  --ink:#1f1b3a; --ink-2:#5b5776; --ink-3:#8f8ba8;
  --line:#ece9f6; --bg:#f8f7fd; --card:#fff;
  --r:18px; --shadow:0 1px 2px rgba(31,27,58,.04),0 8px 24px rgba(31,27,58,.06);
  --font:'Plus Jakarta Sans',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:var(--font);color:var(--ink);background:var(--bg);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:var(--purple);text-decoration:none}
h1,h2,h3{margin:0 0 .4em;line-height:1.2;letter-spacing:-.02em}
h1{font-size:28px} h2{font-size:20px} h3{font-size:16px}
p{margin:0 0 1em}
.muted{color:var(--ink-2)} .small{font-size:13px} .tiny{font-size:12px;color:var(--ink-3)}

/* buttons & inputs */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:11px 22px;font:600 14px var(--font);cursor:pointer;background:var(--purple);color:#fff;transition:.15s;white-space:nowrap}
.btn:hover{background:var(--purple-d)}
.btn.ghost{background:var(--purple-l);color:var(--purple)} .btn.ghost:hover{background:#e3dbff}
.btn.white{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.btn.pink{background:var(--pink)} .btn.danger{background:var(--red-l);color:var(--red)}
.btn.sm{padding:7px 14px;font-size:13px} .btn.block{width:100%}
label{display:block;font-weight:600;font-size:13px;margin:0 0 6px}
input[type=text],input[type=email],input[type=password],input[type=url],textarea,select{width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:11px 14px;font:14px var(--font);color:var(--ink);outline:0;transition:.15s}
input:focus,textarea:focus{border-color:var(--purple);box-shadow:0 0 0 4px var(--purple-l)}
textarea{resize:vertical;min-height:90px}
.field{margin-bottom:16px} .hint{font-size:12px;color:var(--ink-3);margin-top:5px}
.check{display:flex;align-items:center;gap:10px;font-weight:500;font-size:14px;cursor:pointer}
.check input{width:18px;height:18px;accent-color:var(--purple)}

.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:22px}
.pill{display:inline-block;border-radius:999px;padding:3px 10px;font-size:12px;font-weight:600;background:var(--purple-l);color:var(--purple)}
.pill.green{background:var(--green-l);color:#1d9a62} .pill.pink{background:var(--pink-l);color:#d63f8c}
.pill.amber{background:var(--amber-l);color:#b8770a} .pill.red{background:var(--red-l);color:var(--red)} .pill.gray{background:#f0eff5;color:var(--ink-2)}
.alert{border-radius:14px;padding:12px 16px;margin-bottom:18px;font-size:14px;font-weight:500}
.alert.ok{background:var(--green-l);color:#157a4d} .alert.error{background:var(--red-l);color:#b8324b}

.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)} .g3{grid-template-columns:repeat(3,1fr)} .g4{grid-template-columns:repeat(4,1fr)}
.row{display:flex;align-items:center;gap:12px} .between{justify-content:space-between} .wrap{flex-wrap:wrap}
table{width:100%;border-collapse:collapse} th,td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);font-size:14px} th{font-size:12px;color:var(--ink-3);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
pre.code{background:#1f1b3a;color:#e9e5ff;border-radius:14px;padding:16px;overflow:auto;font-size:13px;white-space:pre-wrap;word-break:break-all}

/* ---------- app shell ---------- */
.shell{display:flex;min-height:100vh}
.side{width:236px;flex:none;background:#fff;border-right:1px solid var(--line);padding:22px 14px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--ink);padding:0 10px 22px}
.logo i{width:32px;height:32px;border-radius:11px;background:linear-gradient(135deg,var(--purple),var(--pink));display:grid;place-items:center;color:#fff;font-style:normal;font-size:16px}
.nav a{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:999px;color:var(--ink-2);font-weight:600;font-size:14px;margin-bottom:2px}
.nav a:hover{background:var(--bg);color:var(--ink)}
.nav a.on{background:var(--purple-l);color:var(--purple)}
.nav svg{width:19px;height:19px;flex:none}
.nav .badge{margin-left:auto;background:var(--pink);color:#fff;border-radius:999px;font-size:11px;padding:1px 7px;display:none}
.side .foot{margin-top:auto;padding:12px;border-radius:16px;background:var(--bg)}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.top{display:flex;align-items:center;justify-content:space-between;padding:18px 32px;gap:12px}
.top .ws{font-weight:700}
.content{padding:4px 32px 40px;flex:1;min-width:0}
.mobile-tabs{display:none}

.stat .n{font-size:30px;font-weight:800;letter-spacing:-.03em}
.stat .l{font-size:13px;color:var(--ink-2);font-weight:600}
.bar{height:10px;border-radius:999px;background:var(--line);overflow:hidden}
.bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--purple),var(--pink))}
.spark{display:flex;align-items:flex-end;gap:6px;height:120px;padding-top:10px}
.spark div{flex:1;background:var(--purple-l);border-radius:8px 8px 4px 4px;position:relative;min-height:4px}
.spark div:hover{background:var(--purple)}
.spark div span{position:absolute;bottom:100%;left:50%;transform:translateX(-50%);font-size:11px;color:var(--ink-2);opacity:0}
.spark div:hover span{opacity:1}

.list-item{display:flex;gap:12px;align-items:center;padding:12px 4px;border-bottom:1px solid var(--line);color:var(--ink)}
.list-item:last-child{border-bottom:0}
.avatar{width:38px;height:38px;border-radius:50%;flex:none;display:grid;place-items:center;font-weight:700;font-size:14px;color:#fff;background:linear-gradient(135deg,#a48bff,#ff8cc6)}
.ellipsis{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- inbox ---------- */
.inbox{display:grid;grid-template-columns:330px 1fr 260px;height:calc(100vh - 82px);background:#fff;border-radius:var(--r) var(--r) 0 0;box-shadow:var(--shadow);overflow:hidden;margin:0 32px}
.ib-list{border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.ib-filters{display:flex;gap:6px;padding:14px;border-bottom:1px solid var(--line);overflow-x:auto}
.ib-filters button{border:0;background:var(--bg);border-radius:999px;padding:6px 12px;font:600 13px var(--font);color:var(--ink-2);cursor:pointer;white-space:nowrap}
.ib-filters button.on{background:var(--purple);color:#fff}
.ib-items{overflow-y:auto;flex:1}
.conv{display:flex;gap:12px;padding:14px;border-bottom:1px solid var(--line);cursor:pointer}
.conv:hover{background:#fbfaff} .conv.on{background:var(--purple-l)}
.conv .meta{flex:1;min-width:0}
.conv .name{font-weight:700;font-size:14px;display:flex;justify-content:space-between;gap:8px}
.conv .name time{font-weight:500;font-size:12px;color:var(--ink-3)}
.conv .prev{font-size:13px;color:var(--ink-2)}
.conv .unread{background:var(--pink);color:#fff;border-radius:999px;font-size:11px;padding:0 7px;font-weight:700}
.ib-thread{display:flex;flex-direction:column;min-width:0;min-height:0}
.ib-head{display:flex;align-items:center;gap:10px;padding:12px 18px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.ib-head .back{display:none}
.msgs{flex:1;overflow-y:auto;padding:22px;background:var(--bg);display:flex;flex-direction:column;gap:10px}
.msg{max-width:72%;padding:10px 14px;border-radius:18px;font-size:14px;white-space:pre-wrap;word-wrap:break-word}
.msg .who{font-size:11px;font-weight:700;opacity:.7;margin-bottom:2px}
.msg.visitor{background:#fff;align-self:flex-start;border-bottom-left-radius:6px;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.msg.ai{background:var(--purple-l);align-self:flex-end;border-bottom-right-radius:6px}
.msg.agent{background:var(--purple);color:#fff;align-self:flex-end;border-bottom-right-radius:6px}
.msg time{display:block;font-size:10px;opacity:.6;margin-top:3px}
.typing{font-size:12px;color:var(--ink-3);padding:0 22px 6px;background:var(--bg);min-height:18px}
.composer{display:flex;gap:10px;padding:14px;border-top:1px solid var(--line);align-items:flex-end}
.composer textarea{min-height:46px;max-height:160px;border-radius:22px;padding:12px 18px}
.ib-info{border-left:1px solid var(--line);padding:20px;overflow-y:auto}
.ib-info dt{font-size:12px;color:var(--ink-3);font-weight:600;margin-top:14px} .ib-info dd{margin:2px 0 0;font-size:14px;word-break:break-all}
.empty{display:grid;place-items:center;height:100%;color:var(--ink-3);text-align:center;padding:30px}

/* ---------- auth & landing ---------- */
.auth{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 15% 10%,var(--pink-l),transparent 40%),radial-gradient(circle at 90% 90%,var(--green-l),transparent 40%),var(--bg)}
.auth .card{width:100%;max-width:420px;padding:32px}
.hero{padding:70px 24px 40px;text-align:center;max-width:860px;margin:0 auto}
.hero h1{font-size:52px;letter-spacing:-.04em}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--purple),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:18px;color:var(--ink-2);max-width:620px;margin:16px auto 28px}
.lp-nav{display:flex;justify-content:space-between;align-items:center;padding:18px 28px;max-width:1160px;margin:0 auto}
.section{max-width:1160px;margin:0 auto;padding:40px 24px}
.feature .ico{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;margin-bottom:12px;font-size:20px}
.price-card{display:flex;flex-direction:column}
.price-card.hot{box-shadow:0 0 0 2px var(--purple),var(--shadow)}
.price-card .amt{font-size:38px;font-weight:800;letter-spacing:-.03em} .price-card .amt small{font-size:14px;color:var(--ink-3);font-weight:500}
.price-card ul{list-style:none;padding:0;margin:16px 0 22px;flex:1} .price-card li{padding:6px 0;font-size:14px;display:flex;gap:8px}
.price-card li:before{content:'✓';color:var(--green);font-weight:800}
.swatches{display:flex;gap:8px;flex-wrap:wrap} .swatches button{width:30px;height:30px;border-radius:50%;border:3px solid #fff;box-shadow:0 0 0 1px var(--line);cursor:pointer}

/* ---------- responsive ---------- */
@media (max-width:1100px){ .inbox{grid-template-columns:300px 1fr} .ib-info{display:none} .g4{grid-template-columns:repeat(2,1fr)} }
@media (max-width:860px){
  .side{display:none}
  .top{padding:14px 16px} .content{padding:0 16px 96px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .g4.stats{grid-template-columns:repeat(2,1fr)}
  h1{font-size:23px} .hero h1{font-size:36px}
  .mobile-tabs{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom));z-index:50;justify-content:space-around}
  .mobile-tabs a{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px;font-weight:600;color:var(--ink-3);padding:4px 8px;border-radius:12px;position:relative}
  .mobile-tabs a.on{color:var(--purple)} .mobile-tabs svg{width:22px;height:22px}
  .mobile-tabs .badge{position:absolute;top:0;right:6px;background:var(--pink);color:#fff;border-radius:999px;font-size:10px;padding:0 5px;display:none}
  .inbox{margin:0;border-radius:0;grid-template-columns:1fr;height:calc(100vh - 62px - 64px - env(safe-area-inset-bottom))}
  .inbox.open .ib-list{display:none} .inbox:not(.open) .ib-thread{display:none}
  .ib-head .back{display:inline-flex}
  .msg{max-width:86%}
  table.responsive thead{display:none} table.responsive tr{display:block;border-bottom:1px solid var(--line);padding:8px 0} table.responsive td{display:block;border:0;padding:3px 0}
}