:root{
  --bg:#0b0f14; --panel:#0f151b; --edge:#1f2a22; --text:#d8ffde;
  --muted:#8fd8a9; --brand:#23d18b; --brand2:#19b86b; --danger:#ff6363;
}
*{box-sizing:border-box}html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif}
a{color:var(--brand);text-decoration:none}

/* Login */
.auth{min-height:100dvh;display:grid;place-items:center;padding:16px}
.box{width:100%;max-width:420px;background:var(--panel);border:1px solid var(--edge);border-radius:16px;padding:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;margin-bottom:10px}
.brand .dot{width:10px;height:10px;border-radius:3px;background:var(--brand);box-shadow:0 0 16px var(--brand)}
label{display:block;font-size:12px;color:var(--muted);margin:8px 0 6px}
input,textarea{width:100%;background:#091015;border:1px solid var(--edge);color:var(--text);padding:10px;border-radius:10px}
.btn{cursor:pointer;border:1px solid var(--edge);background:#091015;color:var(--text);padding:10px 14px;border-radius:10px;font-weight:600}
.btn.primary{background:linear-gradient(180deg,var(--brand2),var(--brand));border-color:var(--brand)}
.row{display:grid;gap:8px;margin:10px 0}
.err{color:var(--danger);font-size:13px}

/* Dashboard */
.app{display:grid;grid-template-columns:260px 1fr;min-height:100dvh}
.sidebar{background:linear-gradient(180deg,#0f151b,#0b0f14);border-right:1px solid var(--edge);padding:14px 12px}
.nav{display:grid;gap:6px;margin-top:6px}
.nav a{display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:12px;color:var(--text);border:1px solid transparent}
.nav a:hover{background:#0c1317;border-color:var(--edge)}
.nav a.active{background:#0c1417;border-color:var(--edge)}
.main{padding:18px}
.card{background:var(--panel);border:1px solid var(--edge);border-radius:14px;padding:14px}
.grid{display:grid;gap:16px}.cols-2{grid-template-columns:1fr 1fr}

/* Chat */
.chat{display:grid;grid-template-columns:300px 1fr;gap:14px;min-height:70vh}
.list{background:#0b1216;border:1px solid var(--edge);border-radius:12px;padding:10px}
.msgpane{display:grid;grid-template-rows:auto 1fr auto;gap:10px}
.msglog{background:#091015;border:1px solid var(--edge);border-radius:12px;padding:12px;overflow:auto;min-height:420px}
.msg{display:flex;gap:8px;margin:8px 0}
.bubble{max-width:70%;padding:10px 12px;border-radius:12px;border:1px solid var(--edge)}
.in .bubble{background:#0e171d}
.out{justify-content:flex-end}
.out .bubble{background:#0d1b14;border-color:#143224}
.qrbox{display:flex;align-items:center;justify-content:center;background:#0a1217;border:1px solid var(--edge);border-radius:12px;min-height:260px}
.status{font-size:12px;color:var(--muted)}
.status .dot{width:8px;height:8px;background:#666;border-radius:999px;display:inline-block;margin-right:6px}
.status.on .dot{background:#23d18b}