:root { --bg:#0c0f14; --card:#151a22; --muted:#9aa3af; --text:#e5e7eb; --accent:#22c55e; --danger:#ef4444; }
*{box-sizing:border-box}
body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto;background:var(--bg);color:var(--text)}
a{color:#60a5fa;text-decoration:none}
.nav{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:#0b1220;border-bottom:1px solid #1f2937}
.nav .brand a{font-weight:700;color:#93c5fd}
.nav ul{display:flex;gap:16px;list-style:none;margin:0;padding:0}
.container{max-width:1100px;margin:24px auto;padding:0 16px}
.card{background:var(--card);padding:16px;border-radius:16px;box-shadow:0 2px 10px rgba(0,0,0,.3);margin-bottom:16px}
.card.small{max-width:420px;margin:48px auto}
h1,h2,h3{margin-top:0}
label{display:block;margin:8px 0 4px}
input,textarea,select{width:100%;background:#0b1220;border:1px solid #374151;color:var(--text);border-radius:10px;padding:10px}
button,.btn{background:var(--accent);border:none;color:#052e14;font-weight:700;border-radius:10px;padding:10px 14px;margin-top:10px;cursor:pointer}
.btn{display:inline-block}
.btn:hover,button:hover{filter:brightness(1.05)}
.alert{padding:10px;border-radius:10px;margin:10px 0}
.alert.error{background:#3f1d1d;color:#fecaca;border:1px solid #7f1d1d}
.alert.success{background:#14271c;color:#bbf7d0;border:1px solid #14532d}
.grid{display:grid;grid-template-columns:2fr 1fr;gap:16px}
.split{display:grid;grid-template-columns:320px 1fr;gap:16px}
.sidebar{background:var(--card);padding:12px;border-radius:16px;display:flex;flex-direction:column}
.list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;overflow:auto;max-height:70vh}
.list li{padding:10px;border:1px solid #374151;border-radius:10px;cursor:pointer}
.list li:hover{background:#101826}
.thread{background:var(--card);border-radius:16px;padding:12px;min-height:60vh;display:flex;flex-direction:column;gap:8px;overflow:auto}
.msg{max-width:70%;padding:10px;border-radius:12px}
.in{background:#111827;border:1px solid #374151;align-self:flex-start}
.out{background:#062a14;border:1px solid #14532d;align-self:flex-end}
.meta{font-size:12px;color:var(--muted)}
.sendbar{display:flex;gap:8px;margin-top:8px}
.empty{color:var(--muted);text-align:center;margin-top:24px}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border-bottom:1px solid #374151;padding:8px;text-align:left}
.muted{color:var(--muted);font-size:14px}
.builder-toolbar{display:flex;gap:8px;margin:10px 0}
.builder-toolbar .btn{padding:8px 10px}
.builder-canvas{position:relative;height:70vh;background:#0b1220;border:1px solid #374151;border-radius:12px;overflow:hidden}
.flow-edges{position:absolute;left:0;top:0;pointer-events:none}
.flow-node{position:absolute;min-width:160px;background:#111827;border:1px solid #374151;border-radius:10px;box-shadow:0 2px 8px rgba(0,0,0,.25)}
.flow-node.dragging{opacity:.85}
.node-header{padding:8px 10px;font-weight:700;border-bottom:1px solid #1f2937}
.node-body{padding:8px 10px}
.node-footer{display:flex;justify-content:space-between;padding:8px 10px;border-top:1px solid #1f2937}
.node-footer .mini{font-size:12px;padding:6px 8px}
.node-footer .danger{background:#ef4444;color:#1a0b0b}
@media(max-width:900px){.grid{grid-template-columns:1fr}.split{grid-template-columns:1fr}}