:root {
  --bg: #f5f6f4;
  --surface: #ffffff;
  --text: #17201b;
  --muted: #66706a;
  --border: #e1e5e2;
  --accent: #1f8f4e;
  --accent-text: #ffffff;
  --accent-soft: #e4f3ea;
  --danger: #c0392b;
  --danger-soft: #fbe9e7;
  --warn: #a96b00;
  --warn-soft: #fdf2dc;
  --code-bg: #f0f2f0;
  --shadow: 0 1px 2px rgba(16, 24, 20, .05), 0 1px 8px rgba(16, 24, 20, .04);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1412;
    --surface: #171e1b;
    --text: #e6ece8;
    --muted: #93a099;
    --border: #2a3430;
    --accent: #34b56b;
    --accent-text: #08130d;
    --accent-soft: #173326;
    --danger: #ef6f61;
    --danger-soft: #3a1d1a;
    --warn: #e0a33a;
    --warn-soft: #36290f;
    --code-bg: #111816;
    --shadow: none;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.hidden { display: none !important; }
h1 { font-size: 20px; margin: 0; }
h2 { font-size: 16px; margin: 0 0 10px; }
h3 { font-size: 14px; margin: 18px 0 6px; }
.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 1.2em; margin: 0; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; }
pre { background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; padding: 12px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }

.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; font-size: 15px; white-space: nowrap; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); display: inline-block; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px; box-shadow: var(--shadow); }

label { display: flex; flex-direction: column; gap: 4px; font-weight: 550; font-size: 13px; }
label small { font-weight: 400; color: var(--muted); }
input, select, textarea {
  font: inherit; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; min-width: 0;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.btn { font: inherit; font-weight: 600; border-radius: 8px; padding: 8px 14px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.danger { color: var(--danger); }
.btn.ghost { background: transparent; }
.btn.small { padding: 5px 10px; font-size: 13px; }
.btn:disabled { opacity: .6; cursor: default; }

.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 360px; display: flex; flex-direction: column; gap: 14px; }
.login-card p { margin: 0; }

.top { display: flex; align-items: center; gap: 16px; padding: 10px 24px; background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 2; }
#tabs { display: flex; gap: 2px; flex: 1; overflow-x: auto; }
#tabs button { font: inherit; background: none; border: 0; padding: 8px 12px; border-radius: 8px; color: var(--muted); cursor: pointer; white-space: nowrap; }
#tabs button.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

main { max-width: 1100px; margin: 0 auto; padding: 24px; }
section { display: flex; flex-direction: column; gap: 16px; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; }

.inline-form { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.inline-form label { flex: 1 1 180px; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.narrow { max-width: 520px; }
.actions { display: flex; gap: 8px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.session { display: flex; flex-direction: column; gap: 12px; }
.session-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.session-head .id { color: var(--muted); font-size: 12.5px; }
.session-title { font-weight: 650; font-size: 15px; }
.stats { display: flex; gap: 18px; color: var(--muted); font-size: 13px; }
.stats b { color: var(--text); font-variant-numeric: tabular-nums; }
.qr { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 12px; background: #fff; border-radius: 10px; border: 1px solid var(--border); }
.qr img { width: 240px; max-width: 100%; height: auto; image-rendering: pixelated; }
.qr p { color: #445; margin: 0; font-size: 12.5px; text-align: center; }
.pair-code { font: 700 26px/1.2 ui-monospace, monospace; letter-spacing: 3px; color: #111; }
.pair-row { display: flex; gap: 8px; }
.pair-row input { flex: 1; }
.session .actions { flex-wrap: wrap; }
.session-error { background: var(--warn-soft); color: var(--warn); border-radius: 8px; padding: 8px 10px; font-size: 13px; }
.empty { text-align: center; color: var(--muted); padding: 40px 16px; }

.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 999px; background: var(--code-bg); color: var(--muted); white-space: nowrap; }
.pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.pill.st-open, .pill.st-sent, .pill.st-delivered, .pill.st-read, .pill.st-active { background: var(--accent-soft); color: var(--accent); }
.pill.st-qr, .pill.st-connecting, .pill.st-reconnecting, .pill.st-queued { background: var(--warn-soft); color: var(--warn); }
.pill.st-error, .pill.st-failed, .pill.st-logged_out, .pill.st-revoked { background: var(--danger-soft); color: var(--danger); }

.table-wrap { padding: 0; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
td.text { max-width: 360px; white-space: pre-wrap; word-break: break-word; }
td .err { color: var(--danger); font-size: 12.5px; }
.kv td:first-child { white-space: nowrap; width: 1%; }
.docs h2:not(:first-child) { margin-top: 24px; }

.notice { background: var(--accent-soft); border-color: transparent; display: flex; flex-direction: column; gap: 8px; }
.notice code { background: var(--surface); padding: 8px 10px; border-radius: 6px; word-break: break-all; font-size: 13px; }

.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 8px; z-index: 10; max-width: calc(100% - 32px); }
.toast.bad { background: var(--danger); color: #fff; }

@media (max-width: 720px) {
  .top { flex-wrap: wrap; padding: 10px 16px; gap: 8px; }
  #tabs { order: 3; flex-basis: 100%; }
  #logout { margin-left: auto; }
  main { padding: 16px; }
  .grid { grid-template-columns: 1fr; }
}