:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1c1f24;
  --muted: #69707d;
  --border: #e2e5ea;
  --accent: #2f5bea;
  --accent-text: #ffffff;
  --code-bg: #eef2ff;
  --code-text: #1f3fb8;
  --danger: #c93838;
  --ok: #1f8a4c;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a;
    --surface: #1c1f25;
    --text: #e6e8ec;
    --muted: #9198a5;
    --border: #2d313a;
    --accent: #6b8cff;
    --accent-text: #0d1020;
    --code-bg: #232a45;
    --code-text: #a9bcff;
    --danger: #f07171;
    --ok: #5fcf8e;
  }
}
:root[data-theme="dark"] {
  --bg: #14161a;
  --surface: #1c1f25;
  --text: #e6e8ec;
  --muted: #9198a5;
  --border: #2d313a;
  --accent: #6b8cff;
  --accent-text: #0d1020;
  --code-bg: #232a45;
  --code-text: #a9bcff;
  --danger: #f07171;
  --ok: #5fcf8e;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 ui-sans-serif, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-variant-numeric: tabular-nums;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 24px 16px 64px; }
.narrow { max-width: 400px; margin: 12vh auto 0; }
h1 { font-size: 20px; margin: 0 0 4px; }
.muted { color: var(--muted); font-size: 13px; }
.hidden { display: none !important; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}
.stack > * + * { margin-top: 12px; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
input, select {
  width: 100%;
  padding: 9px 11px;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 7px;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
button {
  font: inherit;
  padding: 8px 14px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.danger { color: var(--danger); }
button.small { padding: 4px 9px; font-size: 13px; }
button:disabled { opacity: .5; cursor: default; }
.error { color: var(--danger); font-size: 14px; min-height: 1.4em; }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; flex-wrap: wrap; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.row > div { flex: 1 1 150px; }

.msg { cursor: pointer; }
.msg + .msg { margin-top: 10px; }
.msg-head { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.msg-from { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.msg-subject { margin-top: 2px; overflow-wrap: anywhere; }
.code-line { display: flex; align-items: center; gap: 10px; margin-top: 10px; flex-wrap: wrap; }
.code {
  font: 600 26px/1.2 ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: .12em;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 4px 12px;
  border-radius: 7px;
}
.msg-body { margin-top: 12px; border-top: 1px solid var(--border); padding-top: 12px; }
.msg-body pre { white-space: pre-wrap; overflow-wrap: anywhere; font: 14px/1.6 inherit; margin: 0; }
.msg-body iframe { width: 100%; height: 480px; border: 1px solid var(--border); border-radius: 7px; background: #fff; display: block; }
.empty { text-align: center; color: var(--muted); padding: 48px 0; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; overflow-x: auto; }
.tabs button { border: 0; border-bottom: 2px solid transparent; border-radius: 0; background: none; color: var(--muted); }
.tabs button.on { color: var(--text); border-bottom-color: var(--accent); }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.stat b { display: block; font-size: 26px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 500; white-space: nowrap; }
td.code-cell { font-family: ui-monospace, Menlo, monospace; font-weight: 600; color: var(--code-text); }
tr.clickable { cursor: pointer; }
tr.clickable:hover td { background: var(--bg); }
.badge { font-size: 12px; padding: 1px 7px; border-radius: 10px; border: 1px solid var(--border); }
.badge.off { color: var(--danger); }
.progress { height: 8px; background: var(--bg); border-radius: 4px; overflow: hidden; }
.progress > div { height: 100%; background: var(--accent); width: 0; transition: width .2s; }
.pager { display: flex; gap: 10px; align-items: center; justify-content: flex-end; margin-top: 12px; }

dialog {
  width: min(760px, calc(100vw - 32px));
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  padding: 16px;
}
dialog::backdrop { background: rgba(0, 0, 0, .45); }
a.button-link {
  display: inline-block;
  padding: 7px 14px;
  border-radius: 7px;
  background: var(--accent);
  color: var(--accent-text);
  text-decoration: none;
  font-weight: 600;
}
a.button-link:hover { filter: brightness(1.08); }