:root{
  --bg:#F4F5FA; --surface:#FFFFFF; --ink:#141824; --sub:#6B7183;
  --border:#E6E8F1; --primary:#5B4BE8; --primary-soft:#ECE9FF;
  --emerald:#0FB981; --amber:#F59E0B; --rose:#F2456B; --chip:#12152A;
  --rail:236px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased; font-size:15px; line-height:1.45;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:14px}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.tnum{font-variant-numeric:tabular-nums}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.muted{color:var(--sub)}

/* layout */
.layout{display:flex;min-height:100vh}
.sidebar{display:none}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.content{padding:20px 16px 96px;max-width:1180px;width:100%}

/* topbar */
.topbar{
  position:sticky;top:0;z-index:20;height:58px;background:var(--surface);
  border-bottom:1px solid var(--border);display:flex;align-items:center;
  justify-content:space-between;padding:0 16px;
}
.topbar .left{display:flex;align-items:center;gap:10px;min-width:0}
.topbar h1{font-size:17px;font-weight:700;letter-spacing:-.3px;margin:0;display:none}
.brand-mini{display:flex;align-items:center;gap:8px;font-weight:800;letter-spacing:-.3px}
.iconbtn{display:grid;place-items:center;width:36px;height:36px;border-radius:9px;color:var(--ink)}
.avatar{width:34px;height:34px;border-radius:999px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-weight:700;font-size:13px}

/* logo mark */
.logo{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--primary),#8B7BFF);display:grid;place-items:center;flex:0 0 auto}
.logo i{width:11px;height:11px;border-radius:999px;border:2.4px solid #fff;border-right-color:transparent;display:block}

/* sidebar (desktop) */
.rail-brand{display:flex;align-items:center;gap:10px;padding:0 16px;height:58px}
.rail-brand .name{color:#fff;font-weight:800;letter-spacing:-.4px;line-height:1}
.rail-brand .tag{color:#7C82A0;font-size:10.5px;letter-spacing:.6px;margin-top:3px}
.nav{padding:8px 12px;flex:1}
.nav a{display:flex;align-items:center;gap:12px;padding:10px 12px;margin-bottom:2px;border-radius:9px;color:#9AA0B8;font-weight:500;font-size:14px}
.nav a.active{background:rgba(91,75,232,.92);color:#fff;font-weight:600}
.rail-foot{padding:14px 16px;border-top:1px solid rgba(255,255,255,.08)}
.rail-foot .k{color:#8A90A6;font-size:11px}
.rail-foot .v{color:#fff;font-size:14px;margin-top:2px}

/* bottom nav (mobile) */
.bottomnav{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;background:var(--surface);border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom)}
.bottomnav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:9px 0 8px;color:var(--sub)}
.bottomnav a.active{color:var(--primary)}
.bottomnav a span{font-size:10.5px;font-weight:500}
.bottomnav a.active span{font-weight:700}

/* drawer */
.drawer{position:fixed;inset:0;z-index:50;display:none}
.drawer.open{display:block}
.scrim{position:absolute;inset:0;background:rgba(10,12,24,.45)}
.drawer-panel{position:absolute;left:0;top:0;bottom:0;width:252px;background:var(--chip);display:flex;flex-direction:column}
.drawer-panel .close{position:absolute;right:10px;top:16px;color:#fff}

/* cards + primitives */
.card{background:var(--surface);border:1px solid var(--border);border-radius:14px}
.pad{padding:16px}
.grid{display:grid}
.gap8{gap:8px}.gap10{gap:10px}.gap12{gap:12px}
.row-between{display:flex;align-items:center;justify-content:space-between;gap:10px}
.flexwrap{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.divider{border-top:1px solid var(--border)}
h2.page{font-size:19px;font-weight:800;letter-spacing:-.4px;margin:0}
h3.sec{font-size:15px;font-weight:700;margin:0}

.chip{font-size:11.5px;font-weight:600;padding:3px 8px;border-radius:6px;white-space:nowrap;display:inline-flex;align-items:center;gap:4px}
.chip-cid{background:var(--chip);color:#fff;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.chip-soft{background:var(--primary-soft);color:var(--primary)}
.chip-grey{background:#EEF0F6;color:var(--sub)}
.st-new{background:var(--primary-soft);color:var(--primary)}
.st-talks{background:#FFF3D6;color:#B7791F}
.st-sampling{background:#E7F7F0;color:#0E8F63}
.st-closed{background:#E7EAF4;color:#4B5470}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:9px 14px;border-radius:10px;font-weight:600;font-size:13.5px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary[disabled]{background:#C9CCDA;cursor:not-allowed}
.btn-ghost{background:var(--surface);border:1px solid var(--border);color:var(--ink)}
.btn-dark{background:var(--ink);color:#fff;width:100%;padding:12px;border-radius:11px;font-size:14.5px;font-weight:700}
.btn-block{width:100%}

.input{border:1px solid var(--border);border-radius:9px;padding:10px 12px;font-size:14px;outline:none;background:var(--surface);width:100%;color:var(--ink)}
textarea.input{resize:vertical;line-height:1.5}
.label{font-size:12px;color:var(--sub);display:block;margin-bottom:5px}

.searchbar{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:9px 12px;flex:1;min-width:200px}
.searchbar input{border:none;outline:none;background:transparent;flex:1}

/* toggle */
.toggle{width:46px;height:26px;border-radius:999px;background:#D3D6E2;position:relative;flex:0 0 auto;transition:background .15s}
.toggle.on{background:var(--emerald)}
.toggle[disabled]{opacity:.5;cursor:not-allowed}
.toggle .dot{position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:999px;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.2);transition:left .15s}
.toggle.on .dot{left:23px}

/* stats */
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.stat .top{display:flex;align-items:center;justify-content:space-between}
.stat .lbl{font-size:12px;color:var(--sub)}
.stat .ic{width:30px;height:30px;border-radius:8px;display:grid;place-items:center}
.stat .val{font-size:26px;font-weight:800;letter-spacing:-.5px;margin-top:8px}
.stat .sub{font-size:11.5px;color:var(--sub);margin-top:2px}

/* segmented */
.seg{display:flex;gap:4px;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:3px}
.seg button{padding:6px 12px;border-radius:7px;font-size:12.5px;font-weight:600;color:var(--sub)}
.seg button.active{background:var(--primary);color:#fff}

/* legend */
.legend{display:flex;gap:14px;margin-top:8px;flex-wrap:wrap}
.legend span{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--sub)}
.dot{width:9px;height:9px;border-radius:999px;display:inline-block}

/* client list rows */
.client{padding:14px}
.avatar-sq{width:42px;height:42px;border-radius:10px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-weight:700;flex:0 0 auto}
.meta{display:flex;align-items:center;gap:6px;color:var(--sub);font-size:12.5px;flex-wrap:wrap;margin-top:3px}

/* tabs */
.tabs{display:flex;gap:4px;overflow-x:auto;padding-bottom:2px}
.tab{padding:8px 14px;border-radius:9px;font-size:13.5px;font-weight:600;white-space:nowrap;background:var(--surface);color:var(--sub);border:1px solid var(--border)}
.tab.active{background:var(--ink);color:#fff;border-color:var(--ink)}

/* info rows */
.inforow{display:flex;align-items:center;gap:12px;padding:11px 0}
.inforow .ic{width:34px;height:34px;border-radius:9px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;flex:0 0 auto}
.inforow .k{font-size:11.5px;color:var(--sub)}
.inforow .v{font-size:14px;font-weight:500}

/* chat */
.msg{display:flex;margin-bottom:10px}
.msg.you{justify-content:flex-end}
.bubble{max-width:80%;padding:9px 12px;border-radius:12px;font-size:13.5px}
.bubble.you{background:var(--primary);color:#fff}
.bubble.them{background:#F1F2F8;color:var(--ink)}
.bubble .stamp{display:flex;align-items:center;gap:4px;justify-content:flex-end;margin-top:4px;font-size:10.5px;opacity:.85}

/* checkbox */
.cb{width:20px;height:20px;border-radius:6px;border:2px solid var(--border);background:transparent;display:grid;place-items:center;flex:0 0 auto}
.cb.on{background:var(--primary);border-color:var(--primary)}

/* list item */
.li{display:flex;align-items:center;gap:12px;padding:11px 8px}
.li + .li{border-top:1px solid var(--border)}
.li .ic{width:38px;height:38px;border-radius:9px;background:#F1F2F8;color:var(--sub);display:grid;place-items:center;flex:0 0 auto}

/* notices */
.notice{border-radius:12px;padding:11px 14px;display:flex;gap:10px;font-size:12.5px;line-height:1.5}
.notice svg{flex:0 0 auto;margin-top:1px}
.notice-warn{background:#FFF7E6;border:1px solid #F5D98B;color:#8A6416}
.notice-info{background:#EEF1FF;border:1px solid #C9D0FF;color:#3A3F8A}

/* mode cards */
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.mode{text-align:left;padding:13px;border-radius:11px;border:1.5px solid var(--border);background:var(--surface)}
.mode.active{border-color:var(--primary);background:var(--primary-soft)}
.mode .t{display:flex;align-items:center;gap:8px;font-weight:700;font-size:14px}
.mode .d{font-size:11.5px;color:var(--sub);margin-top:5px;line-height:1.45}

/* table (admin) */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:12px;background:var(--surface)}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:13px}
th,td{text-align:left;padding:11px 12px;white-space:nowrap}
thead th{background:#F7F8FC;color:var(--sub);font-weight:600;font-size:11.5px;text-transform:uppercase;letter-spacing:.4px;border-bottom:1px solid var(--border)}
tbody tr + tr td{border-top:1px solid var(--border)}
.mini{font-size:11.5px;padding:5px 9px;border-radius:7px;font-weight:600}
.mini-ghost{border:1px solid var(--border);color:var(--ink)}
.mini-rose{background:#FFE7EC;color:var(--rose)}
.mini-em{background:#E7F7F0;color:#0E8F63}

.empty{padding:40px 16px;text-align:center;color:var(--sub)}

/* toast */
.toast{position:fixed;bottom:78px;left:50%;transform:translateX(-50%) translateY(8px);background:var(--chip);color:#fff;padding:10px 16px;border-radius:10px;font-size:13px;z-index:60;box-shadow:0 8px 24px rgba(0,0,0,.25);max-width:90%;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* desktop */
@media (min-width:900px){
  .sidebar{display:flex;flex-direction:column;width:var(--rail);background:var(--chip);position:sticky;top:0;height:100vh}
  .bottomnav{display:none}
  .topbar{padding:0 28px;height:60px}
  .topbar h1{display:block}
  .topbar .brand-mini{display:none}
  .topbar .iconbtn.menu{display:none}
  .content{padding:26px 28px 40px}
  .stat-grid{grid-template-columns:repeat(4,1fr)}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}