:root {
  --bg: #0f1115;
  --panel: #181b22;
  --panel2: #21252e;
  --border: #2a2f3a;
  --text: #e6e8ec;
  --muted: #9aa3b2;
  --accent: #6c8cff;
  --accent2: #4a6bff;
  --danger: #ff5c6c;
  --ok: #38d39f;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
}
#app { height: 100vh; display: flex; flex-direction: column; }
button {
  background: var(--accent2); color: #fff; border: 0; border-radius: 8px;
  padding: 9px 14px; font-size: 14px; cursor: pointer;
}
button:hover { background: var(--accent); }
button.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
button.ghost:hover { background: var(--panel2); }
button.danger { background: transparent; border: 1px solid var(--danger); color: var(--danger); }
button.danger:hover { background: rgba(255,92,108,.12); }
button:disabled { opacity: .5; cursor: not-allowed; }
input, select {
  background: var(--panel2); border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 9px 11px; font-size: 14px; width: 100%;
}
label { font-size: 12px; color: var(--muted); display: block; margin: 10px 0 4px; }
a { color: var(--accent); }

/* ── login ── */
.center { flex: 1; display: flex; align-items: center; justify-content: center; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 28px; width: 360px; max-width: 92vw;
}
.card h1 { margin: 0 0 4px; font-size: 20px; }
.card p.sub { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
.err { color: var(--danger); font-size: 13px; margin-top: 10px; min-height: 16px; }

/* ── shell ── */
header.top {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 18px; border-bottom: 1px solid var(--border); background: var(--panel);
}
header.top .brand { font-weight: 700; }
header.top .brand span { color: var(--accent); }
header.top nav { display: flex; gap: 6px; }
header.top nav button { background: transparent; color: var(--muted); padding: 6px 12px; }
header.top nav button.active { color: var(--text); background: var(--panel2); }
header.top .spacer { flex: 1; }
header.top .who { color: var(--muted); font-size: 13px; }
.role-pill { font-size: 11px; padding: 2px 8px; border-radius: 999px; background: var(--panel2); border: 1px solid var(--border); margin-left: 8px; }

main { flex: 1; overflow: hidden; }

/* ── chat ── */
.chat { display: flex; height: 100%; }
.chat .sidebar { width: 240px; border-right: 1px solid var(--border); background: var(--panel); overflow-y: auto; padding: 10px; }
.chat .sidebar h3 { font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 8px 6px; }
.agent-item { padding: 10px 12px; border-radius: 8px; cursor: pointer; font-size: 14px; }
.agent-item:hover { background: var(--panel2); }
.agent-item.active { background: var(--accent2); color: #fff; }
.chat .main { flex: 1; display: flex; flex-direction: column; }
.chat-head { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--panel); }
.chat-head .chat-title { font-weight: 600; font-size: 14px; }
.chat-head .spacer { flex: 1; }
.chat-head .model-sel { width: auto; max-width: 220px; padding: 6px 9px; font-size: 12px; }
.sess-head { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; padding: 0 4px; }
.sess-head h3 { margin: 0; }
button.ghost.sm { padding: 3px 8px; font-size: 12px; }
.sessions { display: flex; flex-direction: column; gap: 2px; margin-top: 6px; }
.sess-item { display: flex; align-items: center; justify-content: space-between; gap: 6px; padding: 8px 10px; border-radius: 8px; cursor: pointer; font-size: 13px; color: var(--text); }
.sess-item:hover { background: var(--panel2); }
.sess-item.active { background: var(--accent); color: #fff; }
.sess-item .sess-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.sess-del { background: none; border: none; color: inherit; opacity: .5; cursor: pointer; font-size: 16px; line-height: 1; padding: 0 2px; }
.sess-del:hover { opacity: 1; }
.msg.system { align-self: center; background: var(--panel2); color: var(--muted); font-size: 12px; font-style: italic; padding: 6px 12px; border-radius: 10px; }
.messages { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.msg { max-width: 760px; padding: 12px 15px; border-radius: 12px; white-space: pre-wrap; line-height: 1.5; }
.msg.user { align-self: flex-end; background: var(--accent2); color: #fff; }
.msg.assistant { align-self: flex-start; background: var(--panel2); border: 1px solid var(--border); }
.composer { display: flex; gap: 10px; padding: 14px; border-top: 1px solid var(--border); background: var(--panel); }
.composer textarea { flex: 1; resize: none; height: 46px; background: var(--panel2); border: 1px solid var(--border); color: var(--text); border-radius: 10px; padding: 12px; font-size: 14px; font-family: inherit; }
.empty { flex: 1; display: flex; align-items: center; justify-content: center; color: var(--muted); text-align: center; }

/* ── admin ── */
.admin { height: 100%; overflow-y: auto; padding: 22px; }
.admin .row { display: flex; gap: 22px; align-items: flex-start; flex-wrap: wrap; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.panel h2 { margin: 0 0 14px; font-size: 16px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; }
.chip { display: inline-block; background: var(--panel2); border: 1px solid var(--border); border-radius: 999px; padding: 2px 9px; font-size: 12px; margin: 2px 4px 2px 0; }
.chip.none { color: var(--muted); border-style: dashed; }
.actions { display: flex; gap: 6px; flex-wrap: wrap; }
.actions button { padding: 5px 9px; font-size: 12px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.agent-checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 6px; max-height: 260px; overflow-y: auto; margin-top: 6px; }
.agent-checks label { display: flex; align-items: center; gap: 8px; margin: 0; font-size: 13px; color: var(--text); cursor: pointer; }
.agent-checks input { width: auto; }
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.55); display: flex; align-items: center; justify-content: center; z-index: 50; }
.modal { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 22px; width: 480px; max-width: 92vw; }
.modal h2 { margin: 0 0 14px; font-size: 16px; }
.modal .foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--panel2); border: 1px solid var(--border); padding: 10px 16px; border-radius: 10px; font-size: 14px; z-index: 60; }
.toast.err { border-color: var(--danger); color: var(--danger); }