:root {
  --bg: #f6f7f9; --panel: #ffffff; --border: #e3e6ea; --text: #111418; --muted: #6b7280;
  --accent: #0f766e; --accent-text: #ffffff; --in: #eef2ff; --out: #e6f6f3; --danger: #b91c1c;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1117; --panel: #161b22; --border: #2a313b; --text: #e6e8eb; --muted: #8b95a1;
    --accent: #2dd4bf; --accent-text: #041412; --in: #1e2434; --out: #13302b; --danger: #f87171; }
}
* { 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; }
.hidden { display: none !important; }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.microlabel { font-size: 9px; font-weight: 900; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); }
.error { color: var(--danger); min-height: 1em; }
.hint { color: var(--muted); font-size: 12px; }
code { font-family: var(--mono); }

.shell { height: 100dvh; display: flex; flex-direction: column; overflow: hidden; }
.topbar { display: flex; align-items: center; gap: 16px; padding: 8px 16px; border-bottom: 1px solid var(--border); background: var(--panel); flex-wrap: wrap; }
.brand { font-weight: 900; letter-spacing: .15em; font-size: 12px; }
.brand span { color: var(--accent); }
.tabs { display: flex; gap: 2px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 2px; }
.tabs button { border: 0; background: transparent; color: var(--muted); padding: 6px 12px; border-radius: 6px; cursor: pointer; font-weight: 600; font-size: 12px; }
.tabs button.active { background: var(--panel); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,.08); }
.status { margin-left: auto; display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #9ca3af; display: inline-block; }
.dot.on { background: #16a34a; } .dot.off { background: var(--danger); }

.tab { display: none; flex: 1; min-height: 0; overflow: auto; padding: 16px; gap: 16px; }
.tab.active { display: flex; flex-direction: column; }
#tab-inbox.active { flex-direction: row; padding: 0; }

.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.card.wide { width: 100%; max-width: 1000px; margin: 0 auto; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
input, textarea { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 8px 10px; width: 100%; }
textarea { resize: vertical; }
.row { display: flex; align-items: center; gap: 10px; }
.row.wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 160px; }
.btn { font: inherit; font-weight: 600; font-size: 12px; border: 1px solid var(--border); background: var(--panel); color: var(--text); padding: 8px 14px; border-radius: 6px; cursor: pointer; white-space: nowrap; }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.toggle { flex-direction: row; align-items: center; gap: 8px; color: var(--text); cursor: pointer; }
.toggle input { width: auto; }
.toggle.small { font-size: 12px; }
.pre { font-family: var(--mono); font-size: 11px; white-space: pre-wrap; word-break: break-word; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 10px; margin: 0; max-height: 300px; overflow: auto; }

.grid { width: 100%; border-collapse: collapse; font-size: 12px; }
.grid th { text-align: left; font-size: 9px; letter-spacing: .15em; text-transform: uppercase; color: var(--muted); padding: 6px 8px; border-bottom: 1px solid var(--border); }
.grid td { padding: 6px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
.grid .num { font-family: var(--mono); text-align: right; }
.bar { height: 6px; background: var(--bg); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; min-width: 100px; }
.bar i { display: block; height: 100%; background: var(--accent); }

.convlist { width: 300px; border-right: 1px solid var(--border); background: var(--panel); display: flex; flex-direction: column; min-height: 0; }
.listhead { display: flex; justify-content: space-between; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.convlist ul { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
.convlist li { padding: 10px 12px; border-bottom: 1px solid var(--border); cursor: pointer; }
.convlist li.active { background: var(--bg); border-left: 3px solid var(--accent); }
.convlist .top { display: flex; justify-content: space-between; gap: 8px; font-size: 12px; }
.convlist .preview { color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.thread { flex: 1; display: flex; flex-direction: column; min-height: 0; min-width: 0; }
.threadhead { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; border-bottom: 1px solid var(--border); background: var(--panel); }
.messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.msg { max-width: 70%; padding: 8px 12px; border-radius: 10px; border: 1px solid var(--border); font-size: 13px; white-space: pre-wrap; word-break: break-word; }
.msg.in { align-self: flex-start; background: var(--in); }
.msg.out { align-self: flex-end; background: var(--out); }
.msg .meta { display: block; margin-top: 4px; font-size: 10px; color: var(--muted); font-family: var(--mono); }
.msg .meta.err { color: var(--danger); }
.replybox { border-top: 1px solid var(--border); background: var(--panel); padding: 10px 16px; display: flex; flex-direction: column; gap: 8px; }
.replybox .row { justify-content: flex-end; }
.replybox .row .microlabel { margin-right: auto; }

.modal { position: fixed; inset: 0; background: var(--bg); display: flex; align-items: center; justify-content: center; z-index: 10; padding: 16px; }
.modal .card { width: 100%; max-width: 360px; }
.modal h1 { margin: 0; font-size: 16px; letter-spacing: .1em; }

@media (max-width: 720px) {
  #tab-inbox.active { flex-direction: column; }
  .convlist { width: 100%; max-height: 40%; border-right: 0; border-bottom: 1px solid var(--border); }
  .msg { max-width: 90%; }
  .status { width: 100%; margin-left: 0; }
}