:root {
  --bg: #0f1117;
  --bg2: #171a23;
  --bg3: #1e2230;
  --border: #2a2f3f;
  --text: #e6e8ef;
  --muted: #8b91a5;
  --accent: #4f8cff;
  --accent2: #7c5cff;
  --green: #34c98e;
  --red: #ff5d6c;
  --yellow: #ffc857;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.6 -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
button {
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); border: none; color: #fff; }
button.danger { color: var(--red); }
button:disabled { opacity: .5; cursor: not-allowed; }
input, select, textarea {
  background: var(--bg2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  width: 100%;
  font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
label { font-size: 12px; color: var(--muted); display: block; margin: 10px 0 4px; }
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.grid { display: grid; gap: 12px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }
.settings-band { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.switch { display: inline-flex; align-items: center; gap: 8px; margin: 0; cursor: pointer; }
.switch-input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.switch-track {
  position: relative; width: 38px; height: 22px; flex: 0 0 38px;
  border: 1px solid var(--border); border-radius: 11px; background: var(--bg3);
  transition: background .15s, border-color .15s;
}
.switch-track::after {
  content: ''; position: absolute; top: 3px; left: 3px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--muted); transition: transform .15s, background .15s;
}
.switch-input:checked + .switch-track { background: var(--green); border-color: var(--green); }
.switch-input:checked + .switch-track::after { background: #fff; transform: translateX(16px); }
.switch-input:focus-visible + .switch-track { outline: 2px solid var(--accent); outline-offset: 2px; }
.switch-input:disabled + .switch-track { opacity: .55; cursor: not-allowed; }
.switch-status { min-width: 42px; color: var(--text); font-size: 12px; }
.muted { color: var(--muted); font-size: 12px; }
.mono { font-family: var(--mono); }
.badge {
  display: inline-block; padding: 1px 8px; border-radius: 999px;
  font-size: 11px; border: 1px solid var(--border); color: var(--muted);
}
.badge.ok { color: var(--green); border-color: var(--green); }
.badge.warn { color: var(--yellow); border-color: var(--yellow); }
.badge.err { color: var(--red); border-color: var(--red); }
.badge.admin { color: var(--accent); border-color: var(--accent); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { color: var(--muted); font-weight: 500; font-size: 12px; }
tr:hover td { background: rgba(255,255,255,.02); }
.hidden { display: none !important; }

/* Layout */
#app { max-width: 1080px; margin: 0 auto; padding: 20px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
header h1 { font-size: 18px; margin: 0; }
header .spacer { flex: 1; }
nav { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
nav button { border-radius: 999px; }
nav button.active { background: var(--bg3); border-color: var(--accent); color: var(--accent); }

/* Login */
.login-wrap { max-width: 360px; margin: 12vh auto 0; }
.login-wrap h1 { text-align: center; margin-bottom: 20px; }
.login-wrap .card { padding: 24px; }
.login-wrap .hint { font-size: 12px; color: var(--muted); text-align: center; margin-top: 12px; }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.55);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
.modal { width: min(560px, 92vw); max-height: 86vh; overflow: auto; }
.modal h3 { margin-top: 0; }
.flow-url { word-break: break-all; font-family: var(--mono); font-size: 12px; background: var(--bg); padding: 10px; border-radius: 8px; border: 1px solid var(--border); margin: 8px 0; }

/* Chat */
.chat-log { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; min-height: 220px; max-height: 420px; overflow: auto; padding: 12px; white-space: pre-wrap; font-size: 13px; }
.chat-log .assistant { color: var(--text); }
.chat-log .user { color: var(--accent); }

#toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--bg3); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 18px; font-size: 13px; z-index: 99; display: none;
}
#toast.show { display: block; }
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -2px; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 520px) {
  .settings-band { align-items: flex-start; }
}