:root {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --panel-2: #f8f9fc;
  --border: #e3e7ef;
  --text: #1b2333;
  --muted: #6b7489;
  --accent: #2f6fed;
  --accent-soft: #e8efff;
  --danger: #d6453d;
  --danger-soft: #fdecea;
  --ok: #1f9d61;
  --ok-soft: #e4f6ec;
  --warn: #c98200;
  --warn-soft: #fff4dc;
  --bubble-in: #ffffff;
  --bubble-ai: #eef3ff;
  --bubble-op: #e6f6ee;
  --bubble-bot: #f3f4f7;
  --shadow: 0 1px 2px rgba(20, 30, 60, .06), 0 2px 8px rgba(20, 30, 60, .05);
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151d;
    --panel: #181d27;
    --panel-2: #1d2330;
    --border: #2a3242;
    --text: #e6e9f0;
    --muted: #8e97aa;
    --accent: #5b8cff;
    --accent-soft: #1e2a47;
    --danger: #ff6b62;
    --danger-soft: #3a1f1f;
    --ok: #3ccb84;
    --ok-soft: #173224;
    --warn: #f0b23a;
    --warn-soft: #3a2f17;
    --bubble-in: #1d2330;
    --bubble-ai: #1d2843;
    --bubble-op: #183026;
    --bubble-bot: #222835;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 20px; margin: 0; font-weight: 650; }
h2 { font-size: 15px; margin: 0 0 10px; font-weight: 650; }
h3 { font-size: 13px; margin: 0 0 8px; font-weight: 650; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }

/* layout */
.layout { display: grid; grid-template-columns: 220px 1fr; height: 100vh; }
.sidebar {
  background: var(--panel); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 14px 10px; gap: 2px;
}
.brand { display: flex; align-items: center; gap: 9px; padding: 4px 10px 16px; font-weight: 700; font-size: 15px; }
.brand-mark { width: 26px; height: 26px; border-radius: 7px; background: var(--accent); color: #fff; display: grid; place-items: center; font-size: 13px; }
.nav a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 10px; border-radius: 8px; color: var(--text); font-weight: 500;
}
.nav a:hover { background: var(--panel-2); text-decoration: none; }
.nav a.active { background: var(--accent-soft); color: var(--accent); }
.nav .count { background: var(--danger); color: #fff; border-radius: 10px; font-size: 11px; padding: 1px 7px; font-weight: 600; }
.nav .count.soft { background: var(--panel-2); color: var(--muted); border: 1px solid var(--border); }
.sidebar-foot { margin-top: auto; padding: 10px; font-size: 12px; color: var(--muted); display: grid; gap: 6px; }
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; background: var(--muted); }
.status-dot.on { background: var(--ok); }
.status-dot.off { background: var(--danger); }

.main { overflow: auto; display: flex; flex-direction: column; min-width: 0; }
.page { padding: 20px 24px; display: flex; flex-direction: column; gap: 16px; min-height: 0; }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.page-head .sub { color: var(--muted); font-size: 13px; margin-top: 2px; }

.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-body { padding: 14px 16px; }

/* toolbar & controls */
.toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; background: var(--panel); }
.seg button { border: 0; background: transparent; padding: 6px 12px; color: var(--muted); cursor: pointer; font: inherit; }
.seg button.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
input, select, textarea {
  font: inherit; color: var(--text); background: var(--panel);
  border: 1px solid var(--border); border-radius: 8px; padding: 7px 10px; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
textarea { resize: vertical; width: 100%; }
label.field { display: grid; gap: 4px; font-size: 12px; color: var(--muted); font-weight: 500; }
label.field > input, label.field > select, label.field > textarea { font-size: 14px; color: var(--text); }
label.check { display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }

.btn {
  font: inherit; font-weight: 550; cursor: pointer; border-radius: 8px; padding: 7px 13px;
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
}
.btn:hover { background: var(--panel-2); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.06); }
.btn.ok { background: var(--ok); border-color: var(--ok); color: #fff; }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.ghost { border-color: transparent; background: transparent; color: var(--accent); }
.btn.sm { padding: 4px 9px; font-size: 13px; }

/* table */
table.list { width: 100%; border-collapse: collapse; }
table.list th { text-align: left; font-weight: 600; font-size: 12px; color: var(--muted); padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.list td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.list tr:last-child td { border-bottom: 0; }
table.list tbody tr { cursor: pointer; }
table.list tbody tr:hover { background: var(--panel-2); }
table.list .nowrap { white-space: nowrap; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 13px; }
.empty { padding: 40px; text-align: center; color: var(--muted); }
.list-more { padding: 10px 2px; display: flex; gap: 8px; align-items: center; }
.list-more:empty { display: none; }

.badge { display: inline-block; padding: 1px 8px; border-radius: 10px; font-size: 12px; font-weight: 600; background: var(--panel-2); color: var(--muted); border: 1px solid var(--border); white-space: nowrap; }
.badge.ai { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.badge.human { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.badge.urgent, .badge.danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.badge.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }

/* detail views */
.split { display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 16px; align-items: start; }
.stack { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.kv { display: grid; grid-template-columns: 130px 1fr; gap: 6px 10px; font-size: 13px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-word; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* chat */
.thread { display: flex; flex-direction: column; height: calc(100vh - 210px); min-height: 380px; }
.thread.short { height: 420px; min-height: 260px; }
.messages { flex: 1; overflow-y: auto; padding: 14px 16px; display: flex; flex-direction: column; gap: 10px; background: var(--panel-2); border-radius: var(--radius) var(--radius) 0 0; }
.msg { max-width: 78%; display: flex; flex-direction: column; gap: 2px; }
.msg.in { align-self: flex-start; }
.msg.out { align-self: flex-end; align-items: flex-end; }
.msg .meta { font-size: 11px; color: var(--muted); padding: 0 4px; }
.bubble { padding: 8px 11px; border-radius: 12px; white-space: pre-wrap; word-break: break-word; border: 1px solid var(--border); background: var(--bubble-in); }
.msg.ai .bubble { background: var(--bubble-ai); border-color: transparent; }
.msg.operator .bubble { background: var(--bubble-op); border-color: transparent; }
.msg.bot .bubble { background: var(--bubble-bot); border-color: transparent; color: var(--muted); }
.msg.evidence .bubble { outline: 2px solid var(--warn); }
.att { display: flex; flex-direction: column; gap: 4px; margin-top: 6px; }
.att img { max-width: 260px; max-height: 220px; border-radius: 8px; border: 1px solid var(--border); display: block; }
.att video { max-width: 320px; border-radius: 8px; }
.att .file { display: inline-flex; gap: 6px; align-items: center; font-size: 13px; }
.composer { display: flex; gap: 8px; padding: 10px; border-top: 1px solid var(--border); align-items: flex-end; }
.composer textarea { min-height: 40px; max-height: 160px; resize: none; }
.composer .file-name { font-size: 12px; color: var(--muted); }
.mode-banner { padding: 8px 14px; font-size: 13px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.mode-banner.ai { background: var(--accent-soft); color: var(--accent); }
.mode-banner.human { background: var(--ok-soft); color: var(--ok); }

.timeline { display: flex; flex-direction: column; gap: 8px; font-size: 13px; max-height: 320px; overflow: auto; }
.timeline .ev { display: grid; grid-template-columns: 82px 1fr; gap: 8px; }
.timeline .ev time { color: var(--muted); font-size: 12px; }

/* forms */
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.days { display: flex; gap: 4px; flex-wrap: wrap; }
.days label { border: 1px solid var(--border); border-radius: 7px; padding: 4px 8px; cursor: pointer; user-select: none; }
.days input { display: none; }
.days label.on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.break-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.provider-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.provider-card .row { display: flex; justify-content: space-between; font-size: 13px; padding: 3px 0; }

/* knowledge */
.kb { display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 16px; align-items: start; }
.kb-list { max-height: calc(100vh - 220px); overflow: auto; }
.kb-item { padding: 10px 14px; border-bottom: 1px solid var(--border); cursor: pointer; }
.kb-item:hover { background: var(--panel-2); }
.kb-item.active { background: var(--accent-soft); }
.kb-item .t { font-weight: 600; }
.kb-editor textarea { min-height: 380px; font-family: ui-monospace, Consolas, monospace; font-size: 13px; }
.hit { border-top: 1px solid var(--border); padding: 10px 0; font-size: 13px; white-space: pre-wrap; }

/* modal, toasts */
.modal-bg { position: fixed; inset: 0; background: rgba(10, 15, 25, .45); display: grid; place-items: center; z-index: 50; padding: 16px; }
.modal { width: min(560px, 100%); max-height: 90vh; overflow: auto; }
.modal .card-body { display: grid; gap: 12px; }
.modal-foot { display: flex; justify-content: flex-end; gap: 8px; }
#toasts { position: fixed; right: 16px; bottom: 16px; display: grid; gap: 8px; z-index: 60; }
.toast { background: var(--panel); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: 8px; padding: 10px 14px; box-shadow: 0 6px 20px rgba(0,0,0,.15); max-width: 360px; cursor: pointer; }
.toast.error { border-left-color: var(--danger); }
.toast .t { font-weight: 600; }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login .card { width: min(360px, 100%); }
.login .card-body { display: grid; gap: 12px; padding: 24px; }

.error-text { color: var(--danger); font-size: 13px; }

@media (max-width: 1100px) {
  .split, .kb { grid-template-columns: 1fr; }
  .thread { height: 520px; }
}
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .sidebar { flex-direction: row; flex-wrap: wrap; border-right: 0; border-bottom: 1px solid var(--border); }
  .sidebar-foot { display: none; }
  .brand { padding-bottom: 4px; width: 100%; }
  .page { padding: 14px 16px; }
  .msg { max-width: 92%; }
}

/* wide tables scroll inside their card instead of the page */
.card:has(> table.list) { overflow-x: auto; }
.card > table.list { min-width: 640px; }