:root{
  --green:#25d366; --green-d:#128c45; --teal:#0f3d33; --teal-2:#14564a;
  --ink:#1d2b27; --muted:#6b7c77; --line:#e6e9e7; --bg:#eef0ef; --card:#fff;
  --warn-bg:#fff3cd; --warn-ink:#8a6d00; --err:#c0392b;
  --radius:12px; --shadow:0 1px 3px rgba(0,0,0,.06),0 8px 24px rgba(0,0,0,.04);
}
*{box-sizing:border-box}
body{margin:0;font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:inherit;text-decoration:none}
h1{font-size:22px;margin:0}
.muted{color:var(--muted)}
.err{color:var(--err);background:#fdecea;padding:10px 12px;border-radius:8px}
.ok{color:var(--green-d)}
code{background:#eef2f0;padding:2px 6px;border-radius:5px;font-size:13px}

/* layout */
.app{display:flex;min-height:100vh}
.sidebar{width:240px;background:linear-gradient(180deg,var(--teal),var(--teal-2));color:#dfeae6;display:flex;flex-direction:column;flex-shrink:0}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:19px;color:#fff;padding:20px 22px}
.brand .dot{width:11px;height:11px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(37,211,102,.25)}
.sidebar nav{display:flex;flex-direction:column;gap:2px;padding:6px 12px;flex:1}
.sidebar nav a{display:flex;align-items:center;gap:11px;padding:11px 14px;border-radius:10px;color:#cfe0db;font-weight:500}
.sidebar nav a .ico{width:20px;text-align:center;opacity:.9}
.sidebar nav a:hover{background:rgba(255,255,255,.07);color:#fff}
.sidebar nav a.active{background:var(--green);color:#062a1c;font-weight:700}
.sidebar-foot{padding:16px 20px;border-top:1px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:space-between}
.sidebar-foot .who{display:flex;flex-direction:column;line-height:1.2}
.sidebar-foot .who span{font-size:12px;color:#9fb8b0}
.sidebar-foot .signout{font-size:13px;color:#bcd;}
.sidebar-foot .signout:hover{color:#fff}

.content{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:18px 28px;background:#f5f6f5;border-bottom:1px solid var(--line)}
.warn-pill{background:var(--warn-bg);color:var(--warn-ink);padding:7px 13px;border-radius:20px;font-size:13px;font-weight:600}
.ok-pill{background:#e7f8ee;color:var(--green-d);padding:7px 13px;border-radius:20px;font-size:13px;font-weight:600}
.flash{margin:16px 28px 0;background:#e7f8ee;border:1px solid #bde9cd;color:var(--green-d);padding:11px 15px;border-radius:10px}
.page{padding:24px 28px;flex:1}

/* cards & grid */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.stat .k{font-size:13px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.4px}
.stat .v{font-size:30px;font-weight:800;margin-top:6px}
.stat .v small{font-size:14px;font-weight:600;color:var(--muted)}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:20px}
.panel h2{font-size:16px;margin:0;padding:16px 18px;border-bottom:1px solid var(--line)}
.panel .body{padding:18px}
.panel-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line)}
.panel-head h2{border:0;padding:0}

/* tables */
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);font-size:14px}
th{font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}
tr:last-child td{border-bottom:0}
.tag{display:inline-block;background:#eef2f0;color:#3a544c;border-radius:20px;padding:2px 10px;font-size:12px;margin:1px}

/* status pills */
.s{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:700}
.s-draft{background:#eceff1;color:#546e7a}
.s-queued{background:#fff3cd;color:#8a6d00}
.s-sending{background:#e3f2fd;color:#1565c0}
.s-done{background:#e7f8ee;color:var(--green-d)}
.s-paused{background:#fde2e2;color:#b3261e}
.s-pending{background:#eceff1;color:#546e7a}
.s-sent{background:#e7f8ee;color:var(--green-d)}
.s-failed{background:#fde2e2;color:#b3261e}

/* forms & buttons */
form label{display:block;margin-bottom:14px;font-size:13px;font-weight:600;color:#3a4a45}
input,textarea,select{width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font:inherit;background:#fff}
textarea{min-height:120px;resize:vertical}
.row{display:flex;gap:16px;flex-wrap:wrap}
.row>label{flex:1;min-width:180px}
.btn{display:inline-block;border:0;cursor:pointer;padding:10px 18px;border-radius:9px;font-weight:700;font-size:14px;background:#eef2f0;color:#28433b}
.btn:hover{filter:brightness(.97)}
.btn-primary{background:var(--green);color:#062a1c}
.btn-ghost{background:transparent;border:1px solid var(--line)}
.btn-danger{background:#fde2e2;color:#b3261e}
.btn-sm{padding:6px 12px;font-size:13px}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.empty{padding:40px;text-align:center;color:var(--muted)}
.empty .big{font-size:38px;opacity:.4}

/* chat / inbox */
.inbox{display:grid;grid-template-columns:300px 1fr;gap:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);min-height:520px}
.threads{border-right:1px solid var(--line);overflow-y:auto;max-height:70vh}
.thread{padding:13px 16px;border-bottom:1px solid var(--line);cursor:pointer;display:block}
.thread:hover,.thread.active{background:#f3f7f5}
.thread .n{font-weight:700}
.thread .p{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.convo{display:flex;flex-direction:column}
.convo .stream{flex:1;padding:18px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;max-height:60vh;background:#f7f9f8}
.bubble{max-width:70%;padding:9px 13px;border-radius:12px;font-size:14px}
.bubble.in{background:#fff;border:1px solid var(--line);align-self:flex-start}
.bubble.out{background:#d6f5e3;align-self:flex-end}
.bubble .t{display:block;font-size:11px;color:var(--muted);margin-top:4px}
.convo .composer{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line)}
.convo .composer input{margin:0}
.pick{padding:18px;color:var(--muted);display:flex;align-items:center;justify-content:center}

/* progress */
.bar{height:8px;background:#eceff1;border-radius:20px;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--green)}

/* auth */
.auth-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,var(--teal),var(--teal-2))}
.auth-card{background:#fff;border-radius:16px;padding:30px;width:360px;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.auth-card .brand{padding:0 0 6px;color:var(--ink)}
.auth-card h1{margin:6px 0 16px;font-size:20px}
.hint{font-size:12px;color:var(--muted);margin-top:4px}
/* sessions */
.sess-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.card.sess{padding:16px}
.sess-top{display:flex;align-items:center;justify-content:space-between;gap:8px}
.sess-meta{margin-top:8px;display:flex;align-items:center;gap:8px;font-size:13px}
.qrbox{display:inline-block;padding:14px;background:#fff;border:1px solid var(--line);border-radius:12px;margin:6px auto 14px}
.qrbox svg,.qrbox img{display:block;border-radius:4px}
.inline-form{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:10px}
.inline-form input{margin:0}
.badge-engine{font-size:11px}
@media(max-width:820px){.sidebar{width:64px}.sidebar .brand span:last-child,.sidebar nav a span:last-child,.sidebar-foot .who{display:none}.inbox{grid-template-columns:1fr}}