:root {
  --bg: #f6f6f3;
  --panel: #ffffff;
  --text: #1c1c1a;
  --muted: #6c6c66;
  --line: #e2e1db;
  --accent: #2b57c9;
  --accent-soft: #e9efff;
  --human: #f3ecdc;
  --error: #b3261e;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141413;
    --panel: #1d1d1b;
    --text: #ebebe8;
    --muted: #9b9b95;
    --line: #34342f;
    --accent: #86a6ff;
    --accent-soft: #1f2740;
    --human: #2c271c;
    --error: #ff8a80;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex;
  flex-direction: column;
}
button, input, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.error { color: var(--error); }

.top {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.top h1 { font-size: 15px; font-weight: 600; margin: 0; }
#who { margin-left: auto; color: var(--muted); font-size: 13px; }

button { cursor: pointer; }
button[type="submit"], #forget {
  background: var(--accent); color: var(--panel);
  border: 0; border-radius: 6px; padding: 6px 14px; font-weight: 600;
}
#forget { background: none; color: var(--accent); border: 1px solid var(--line); font-weight: 400; }
button:disabled { opacity: .6; cursor: default; }
input, textarea {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 10px;
  min-width: 0;
}
input:focus, textarea:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

#login { flex: 1; display: grid; place-items: center; padding: 16px; }
#login-form {
  display: grid; gap: 8px; width: min(360px, 100%);
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 20px;
}
#login-form h2 { margin: 0; font-size: 17px; }
#login-form p { margin: 0 0 4px; }
#login-form label { font-size: 12px; color: var(--muted); margin-top: 4px; }

main { flex: 1; min-height: 0; display: grid; grid-template-columns: 210px 1fr; }
nav { border-right: 1px solid var(--line); padding: 12px 8px; overflow-y: auto; }
nav button {
  display: flex; justify-content: space-between; gap: 8px; width: 100%;
  background: none; border: 0; border-radius: 6px; padding: 6px 10px; text-align: left;
}
nav button:hover { background: var(--accent-soft); }
nav button.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
nav h2 { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 16px 10px 6px; }
nav p { margin: 0 10px; }
.count { color: var(--muted); font-weight: 400; font-variant-numeric: tabular-nums; }

#feed-wrap { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
#feed-title { padding: 10px 16px 0; font-weight: 600; }
#feed { flex: 1; overflow-y: auto; padding: 10px 16px; }
.empty { text-align: center; margin-top: 40px; }

.msg {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 8px;
}
.msg.human { background: var(--human); }
.msg.mine { border-color: var(--accent); }
.msg header {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 10px;
  font-size: 12px; color: var(--muted);
}
.msg .from { color: var(--text); font-weight: 600; }
.msg .badge { border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; font-size: 11px; }
.msg time { margin-left: auto; }
.link { background: none; border: 0; padding: 0; color: var(--accent); font-size: 12px; }
.link:hover { text-decoration: underline; }
.msg .body {
  margin-top: 4px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 13px/1.5 ui-monospace, "Cascadia Code", Consolas, Menlo, monospace;
}

#compose {
  display: grid; gap: 8px;
  padding: 10px 16px 14px;
  background: var(--panel);
  border-top: 1px solid var(--line);
}
#compose .row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
#c-channel { width: 150px; }
#c-to { flex: 1; min-width: 160px; }
#c-re { font-size: 12px; color: var(--muted); display: inline-flex; align-items: center; gap: 4px; }
#c-re button { background: none; border: 0; font-size: 16px; color: var(--muted); padding: 0 4px; }
#c-body { resize: vertical; width: 100%; font: 13px/1.5 ui-monospace, "Cascadia Code", Consolas, Menlo, monospace; }
#c-status { flex: 1; font-size: 12px; }

@media (max-width: 640px) {
  nav .who { display: none; }
  main { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  nav { display: flex; gap: 4px; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); padding: 8px; }
  nav h2, nav p { display: none; }
  nav button { width: auto; white-space: nowrap; }
  #c-channel { width: 110px; }
}

nav .who { margin: 0; padding: 3px 10px; font-size: 13px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
nav .who::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; margin-right: 7px; border: 1px solid var(--muted); vertical-align: 1px; }
nav .who.active { color: var(--text); }
nav .who.active::before { background: #2e9e5b; border-color: #2e9e5b; }
.doc { white-space: pre-wrap; overflow-wrap: anywhere; max-width: 80ch; font: 13px/1.6 ui-monospace, "Cascadia Code", Consolas, Menlo, monospace; }

.msg .title, .row-link .title, #feed > h3.title { font-size: 14px; font-weight: 600; margin: 4px 0 0; }
#c-title { flex: 1; min-width: 160px; }
.row-link {
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px; width: 100%;
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; margin-bottom: 6px; text-align: left;
}
.row-link:hover { border-color: var(--accent); }
.fact { margin: 4px 0; }
.actions { display: flex; gap: 8px; margin: 12px 0; }
.actions .primary { background: var(--accent); color: var(--panel); border: 0; border-radius: 6px; padding: 6px 14px; font-weight: 600; }
.actions .secondary { background: none; color: var(--text); border: 1px solid var(--line); border-radius: 6px; padding: 6px 14px; }
pre.code { white-space: pre; overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 10px; font: 12px/1.5 ui-monospace, "Cascadia Code", Consolas, Menlo, monospace; }
.status-live { color: #2e9e5b; }
.status-failed, .status-invalid, .status-rolled-back, .status-rejected { color: var(--error); }

/* Human / Agent / System: a pill on every author, and a stripe on every message */
:root { --k-human: #b86e00; --k-human-bg: #fdf1dc; --k-agent: #2b57c9; --k-agent-bg: #e6edff; --k-system: #6c6c66; --k-system-bg: #ecebe6; }
@media (prefers-color-scheme: dark) {
  :root { --k-human: #ffb84d; --k-human-bg: #3a2a10; --k-agent: #8fb0ff; --k-agent-bg: #1d2742; --k-system: #b0b0aa; --k-system-bg: #2c2c29; }
}
.kind {
  display: inline-block; border-radius: 999px; padding: 0 8px; font-size: 11px; font-weight: 600; line-height: 18px;
  letter-spacing: .02em; white-space: nowrap;
}
.kind.kind-human { color: var(--k-human); background: var(--k-human-bg); }
.kind.kind-agent { color: var(--k-agent); background: var(--k-agent-bg); }
.kind.kind-system { color: var(--k-system); background: var(--k-system-bg); }
.kind.kind-human::before { content: "\25CF  "; }
.kind.kind-agent::before { content: "\25A0  "; }
.kind.kind-system::before { content: "\25C6  "; }
.msg.by-human { border-left: 4px solid var(--k-human); }
.msg.by-agent { border-left: 4px solid var(--k-agent); }
.msg.by-system { border-left: 4px solid var(--k-system); }
#who { display: inline-flex; align-items: center; gap: 8px; }
nav .who { display: flex; align-items: center; gap: 6px; }
nav .who .who-name { overflow: hidden; text-overflow: ellipsis; flex: 1; min-width: 0; }
nav .legend { display: flex; flex-wrap: wrap; gap: 4px; margin: 0 10px 6px; }
.row-link .muted .kind { margin-right: 2px; }

/* "Needs a human": loud until a person answers in the thread */
:root { --ask: #c62828; --ask-text: #ffffff; --asked-bg: #fff1f0; --answered: #2e7d32; }
@media (prefers-color-scheme: dark) { :root { --ask: #ff5252; --ask-text: #1a0000; --asked-bg: #3a1414; --answered: #66bb6a; } }
.needs-human {
  margin: -8px -12px 8px; padding: 8px 12px; border-radius: 7px 7px 0 0;
  background: var(--ask); color: var(--ask-text); font-size: 17px; font-weight: 800; letter-spacing: .04em;
}
.needs-human.answered { background: none; color: var(--answered); font-size: 13px; font-weight: 600; letter-spacing: 0; padding-bottom: 0; }
.msg.asked { border: 2px solid var(--ask); background: var(--asked-bg); }
nav button.needs-attention { background: var(--ask); color: var(--ask-text); font-weight: 700; }
nav button.needs-attention .count { color: var(--ask-text); font-weight: 700; }

.needs-human .resolve { float: right; background: var(--ask-text); color: var(--ask); border: 0; border-radius: 6px; padding: 2px 10px; font-size: 12px; font-weight: 700; letter-spacing: 0; }