:root{
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  --ink:#16232E; --ink2:#3D4C58; --muted:#7C8A96; --line:#E4E8EB;
  --paper:#EEF1F4; --white:#fff; --orange:#FF6A3D; --orange-soft:rgba(255,106,61,.12);
  --green:#1FA97A; --green-soft:rgba(31,169,122,.12); --red:#E0473F; --red-soft:rgba(224,71,63,.1);
}
*{margin:0;padding:0;box-sizing:border-box;}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;}
a{color:inherit;text-decoration:none;}
img,svg{display:block;}
.icon{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
button{font:inherit;border:none;background:none;cursor:pointer;color:inherit;}
input,select{font:inherit;color:inherit;}

.wrap{max-width:1180px;margin:0 auto;padding:0 24px;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:14px;
  padding:13px 22px;border-radius:14px;white-space:nowrap;}
.btn-primary{background:var(--ink);color:#fff;}
.btn-accent{background:var(--orange);color:#fff;}
.btn-ghost{background:var(--white);color:var(--ink);border:1px solid var(--line);}
.btn-text{font:600 13px var(--sans);border-bottom:1px solid rgba(22,35,46,.3);padding:2px 0;border-radius:0;}
.btn-sm{padding:9px 14px;font-size:13px;border-radius:11px;}
.btn-full{width:100%;}
.btn[disabled]{opacity:.4;pointer-events:none;}

.card{background:var(--white);border-radius:18px;padding:20px;box-shadow:0 8px 24px -14px rgba(22,35,46,.25);}
.pill{display:inline-flex;align-items:center;gap:6px;background:var(--paper);border-radius:20px;padding:6px 12px;font:600 11px var(--mono);letter-spacing:.04em;}
.eyebrow{font:700 12px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--orange);margin-bottom:14px;}
.badge{display:inline-flex;align-items:center;gap:6px;font:600 11px var(--sans);padding:4px 10px;border-radius:20px;}
.badge-green{background:var(--green-soft);color:var(--green);}
.badge-red{background:var(--red-soft);color:var(--red);}
.badge-muted{background:var(--paper);color:var(--muted);}
.dot{width:7px;height:7px;border-radius:50%;background:currentColor;}

.label{display:block;font:600 12px var(--sans);color:var(--ink2);margin-bottom:8px;}
.input{width:100%;background:var(--paper);border:1px solid transparent;border-radius:12px;padding:13px 15px;font-size:14px;color:var(--ink);}
.input:focus{outline:none;border-color:var(--orange);background:#fff;}
.field{margin-bottom:16px;}
.hint{font:12px var(--sans);color:var(--muted);margin-top:6px;}

.progress-track{height:6px;background:var(--paper);border-radius:20px;overflow:hidden;}
.progress-fill{height:100%;background:var(--orange);border-radius:20px;}

.table-wrap{overflow-x:auto;border-radius:14px;border:1px solid var(--line);background:#fff;box-shadow:0 8px 24px -16px rgba(22,35,46,.2);}
table{width:100%;border-collapse:collapse;min-width:640px;}
th{text-align:left;font:600 11px var(--mono);letter-spacing:.05em;text-transform:uppercase;color:var(--muted);
  padding:12px 16px;background:var(--paper);white-space:nowrap;}
td{padding:14px 16px;font-size:13.5px;border-top:1px solid var(--line);white-space:nowrap;}
tr.clickable{cursor:pointer;}
tr.clickable:hover td{background:var(--paper);}

/* ===== overlay / sheet ===== */
.scrim{position:fixed;inset:0;background:rgba(22,35,46,.5);z-index:300;}
.sheet{position:fixed;left:0;right:0;bottom:0;background:#fff;z-index:301;border-radius:22px 22px 0 0;
  max-height:88vh;overflow-y:auto;box-shadow:0 -20px 50px -10px rgba(22,35,46,.3);}
.sheet-handle{width:40px;height:5px;background:var(--line);border-radius:20px;margin:12px auto 4px;}
.sheet-inner{padding:8px 24px 32px;}
.sheet-head{display:flex;justify-content:space-between;align-items:center;padding:12px 0 18px;}
.sheet-head h3{font-size:18px;font-weight:700;}
@media (min-width:768px){
  .sheet{left:auto;top:0;right:0;bottom:0;width:480px;border-radius:22px 0 0 22px;max-height:100vh;}
  .sheet-handle{display:none;}
}

/* ===== landing ===== */
.landing-nav{display:flex;justify-content:space-between;align-items:center;padding:22px 0;}
.brand{font:700 15px var(--sans);letter-spacing:-.01em;}
.brand span{color:var(--orange);}
.hero{padding:20px 0 70px;background-image:
    linear-gradient(rgba(27,58,92,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27,58,92,.05) 1px, transparent 1px);
  background-size:36px 36px;}
.hero h1{font:700 clamp(32px,5.6vw,58px)/1.14 var(--sans);letter-spacing:-.02em;max-width:15ch;margin-bottom:20px;}
.hero h1 span{color:var(--orange);}
.hero .sub{font:16px/1.65 var(--sans);color:var(--ink2);max-width:44ch;margin-bottom:32px;}
.section{padding:70px 0;}
.section-title{font:700 clamp(24px,3.4vw,34px)/1.2 var(--sans);letter-spacing:-.01em;max-width:20ch;margin-bottom:44px;}
.steps3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
@media (max-width:860px){.steps3{grid-template-columns:1fr;}}
.step-card{background:#fff;border-radius:18px;padding:24px;box-shadow:0 8px 24px -14px rgba(22,35,46,.2);}
.step-card .n{font:600 11px var(--mono);color:var(--muted);margin-bottom:10px;}
.step-card h4{font-size:16px;margin-bottom:8px;}
.step-card p{font-size:13.5px;color:var(--ink2);line-height:1.55;}
.ask-card{background:var(--ink);color:#fff;border-radius:24px;padding:44px;text-align:center;}
.ask-card .pill{background:rgba(255,255,255,.1);color:#FF9E80;}
.ask-card h3{font:700 clamp(22px,3vw,30px)/1.25;margin:18px 0 12px;max-width:26ch;margin-inline:auto;}
.ask-card p{color:rgba(255,255,255,.65);max-width:40ch;margin:0 auto 26px;font-size:14px;}
footer{border-top:1px solid var(--line);padding:36px 0;}
.foot-grid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;font-size:12.5px;color:var(--muted);}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;}
.foot-links a{border-bottom:1px solid transparent;}
.foot-links a:hover{border-color:var(--muted);}

/* ===== quiz / steps ===== */
.step-shell{min-height:100vh;display:flex;flex-direction:column;background:var(--paper);}
.step-top{padding:20px 24px;display:flex;align-items:center;gap:16px;}
.step-back{width:36px;height:36px;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 10px -4px rgba(22,35,46,.2);}
.step-chip{flex:1;}
.step-body{flex:1;display:flex;flex-direction:column;justify-content:center;padding:20px 24px 60px;max-width:640px;margin:0 auto;width:100%;}
.step-eyebrow{font:600 12px var(--mono);color:var(--muted);margin-bottom:10px;}
.step-q{font:700 clamp(22px,3.4vw,30px)/1.3;margin-bottom:28px;max-width:18ch;}
.opt{display:block;background:#fff;border-radius:16px;padding:18px 20px;margin-bottom:12px;border:1.5px solid transparent;}
.opt:hover{border-color:var(--orange);}
.opt b{display:block;font-size:14.5px;margin-bottom:3px;}
.opt span{font-size:12.5px;color:var(--muted);}

/* ===== app shell ===== */
.appshell{min-height:100vh;background:var(--paper);padding-bottom:96px;}
.app-top{position:sticky;top:0;z-index:50;background:var(--paper);padding:16px 20px;display:flex;justify-content:space-between;align-items:center;}
.app-top h2{font-size:19px;font-weight:700;}
.avatar{width:38px;height:38px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font:700 13px var(--sans);}
.app-body{padding:0 20px;max-width:1040px;margin:0 auto;}

.bottomnav{position:fixed;bottom:0;left:0;right:0;z-index:60;background:#fff;border-top:1px solid var(--line);
  display:flex;padding:8px 6px calc(8px + env(safe-area-inset-bottom));box-shadow:0 -6px 20px -14px rgba(22,35,46,.3);}
.bottomnav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:6px 4px;border-radius:12px;color:var(--muted);}
.bottomnav a.on{color:var(--orange);}
.bottomnav a span{font:600 10.5px var(--sans);}

.sidebar{display:none;}
.app-flex{display:block;}
.app-stack{min-width:0;}
@media (min-width:768px){
  .appshell{padding-bottom:0;}
  .bottomnav{display:none;}
  .app-flex{display:flex;align-items:flex-start;}
  .app-stack{flex:1;}
  .sidebar{display:flex;flex-direction:column;position:sticky;top:0;align-self:flex-start;height:100vh;width:236px;
    flex-shrink:0;background:#fff;border-right:1px solid var(--line);padding:22px 16px;z-index:60;}
  .sidebar .brand{padding:6px 10px 26px;}
  .sidebar a{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:12px;color:var(--ink2);font:600 13.5px var(--sans);margin-bottom:2px;}
  .sidebar a.on{background:var(--ink);color:#fff;}
  .app-top{padding:20px 32px;}
  .app-body{padding:0 32px;}
}

.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-bottom:24px;}
.kpi{background:#fff;border-radius:16px;padding:18px 20px;}
.kpi .l{font:600 11px var(--mono);color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;}
.kpi .v{font:700 26px var(--sans);letter-spacing:-.01em;}
.kpi .v small{font-size:13px;color:var(--muted);font-weight:600;}
.chart-box{background:#fff;border-radius:18px;padding:20px;height:230px;}

.section-h{display:flex;justify-content:space-between;align-items:center;margin:28px 0 14px;}
.section-h h3{font-size:15px;font-weight:700;}

.list-item{display:flex;align-items:center;gap:14px;background:#fff;border-radius:16px;padding:16px 18px;margin-bottom:10px;}
.list-item .ic{width:40px;height:40px;border-radius:12px;background:var(--orange-soft);color:var(--orange);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.list-item .meta{flex:1;min-width:0;}
.list-item .meta b{display:block;font-size:14.5px;margin-bottom:2px;}
.list-item .meta span{font-size:12.5px;color:var(--muted);}

.tabs{display:flex;gap:6px;background:var(--paper);border-radius:14px;padding:5px;margin-bottom:20px;overflow-x:auto;}
.tabs button{flex:1;padding:10px 14px;border-radius:10px;font:600 13px var(--sans);color:var(--ink2);white-space:nowrap;}
.tabs button.on{background:#fff;color:var(--ink);box-shadow:0 4px 10px -4px rgba(22,35,46,.2);}

.usage-row{display:flex;justify-content:space-between;font-size:13px;margin-bottom:8px;}
.usage-row span:last-child{color:var(--muted);font:12px var(--mono);}
.usage-block{margin-bottom:20px;}

.status-row{display:flex;align-items:center;gap:14px;background:#fff;border-radius:16px;padding:16px 18px;margin-bottom:10px;}
.status-row .ic{width:38px;height:38px;border-radius:10px;background:var(--paper);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.status-row .meta{flex:1;}
.status-row .meta b{display:block;font-size:14px;margin-bottom:2px;}
.status-row .meta span{font-size:12px;color:var(--muted);}

.json-box{background:var(--ink);color:#B9E6D3;font:12px/1.6 var(--mono);padding:16px;border-radius:12px;white-space:pre-wrap;word-break:break-all;max-height:220px;overflow-y:auto;}
.code-box{background:var(--paper);font:12.5px/1.6 var(--mono);padding:14px 16px;border-radius:12px;overflow-x:auto;white-space:pre;}

.mockup-frame{position:relative;}
.impersonate-bar{background:var(--ink);color:#fff;font:600 12.5px var(--sans);display:flex;justify-content:space-between;align-items:center;padding:10px 20px;}
.impersonate-bar b{color:var(--orange);}

.toggle{width:42px;height:24px;border-radius:20px;background:var(--line);position:relative;flex-shrink:0;}
.toggle.on{background:var(--orange);}
.toggle i{position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:#fff;transition:.15s;}
.toggle.on i{left:21px;}

.bub{font:13px/1.5 var(--sans);padding:9px 13px;border-radius:14px;max-width:85%;}
.bub.agent{background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px;}
.bub.user{background:var(--orange-soft);border-bottom-right-radius:4px;}