:root {
  --bg: #f6f7f9; --fg: #1d2330; --muted: #6b7280; --card: #fff; --line: #e3e6eb;
  --accent: #0b63ce; --ok: #137333; --ok-bg: #e6f4ea; --warn: #8a5300; --warn-bg: #fef3d6;
  --bad: #b3261e; --bad-bg: #fce8e6; --info-bg: #e8f0fe;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14171c; --fg: #e6e8eb; --muted: #9aa1ab; --card: #1d2128; --line: #2e333b;
    --accent: #6ea8fe; --ok: #81c995; --ok-bg: #1e3326; --warn: #fdd663; --warn-bg: #3a3015;
    --bad: #f28b82; --bad-bg: #3c1f1d; --info-bg: #1c2b45; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 15px/1.55 system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; }
a { color: var(--accent); }
h1 { font-size: 1.4rem; margin: .2rem 0 1rem; }
h2 { font-size: 1.05rem; margin: 1.4rem 0 .5rem; }
code { font-size: .88em; background: var(--bg); padding: 1px 4px; border-radius: 4px; word-break: break-all; }
.muted { color: var(--muted); }
input, select, textarea, button { font: inherit; color: inherit; }
input[type=text], input[type=password], input[type=email], input[type=number], input[type=search], select, textarea {
  padding: .45rem .6rem; border: 1px solid var(--line); border-radius: 6px; background: var(--card); min-width: 0; }
button { padding: .45rem .9rem; border: 1px solid var(--line); border-radius: 6px; background: var(--card); cursor: pointer; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.danger { color: var(--bad); border-color: var(--bad); }
button.big { width: 100%; padding: .8rem; font-size: 1.05rem; margin-top: 1rem; }
button.link { border: 0; background: none; color: var(--accent); padding: 0; }
button:disabled { opacity: .5; cursor: not-allowed; }
.alert { padding: .7rem .9rem; border-radius: 8px; margin: .8rem 0; }
.alert.ok { background: var(--ok-bg); color: var(--ok); }
.alert.warn { background: var(--warn-bg); color: var(--warn); }
.alert.bad { background: var(--bad-bg); color: var(--bad); }
.alert.info { background: var(--info-bg); }
.badge { display: inline-block; padding: 0 .5rem; border-radius: 99px; font-size: .8rem; font-weight: 600; vertical-align: middle; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.bad { background: var(--bad-bg); color: var(--bad); }
.badge.muted { background: var(--line); color: var(--muted); }
.stack { display: flex; flex-direction: column; gap: .6rem; }
.row { display: flex; gap: .6rem; align-items: center; margin: .6rem 0; }
.row.wrap { flex-wrap: wrap; }
.row input[type=text] { flex: 1; }
form.inline { display: inline; }

/* 公网绑定页 */
body.public { padding: 16px; }
.card { max-width: 560px; margin: 4vh auto; background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 1.5rem; }
.notice ul, .notice ol { padding-left: 1.2rem; }
.notice li { margin: .3rem 0; }

/* 管理端 */
.topbar { display: flex; gap: 1.2rem; align-items: center; padding: .7rem 16px; background: var(--card);
  border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.topbar nav { display: flex; gap: .9rem; flex: 1; flex-wrap: wrap; }
.topbar nav a { text-decoration: none; color: var(--muted); }
.topbar nav a.on { color: var(--fg); font-weight: 600; }
main.wide { max-width: 1200px; margin: 0 auto; padding: 1rem 16px 3rem; }
.grid { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 8px; }
.grid th, .grid td { text-align: left; padding: .5rem .6rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.grid th { font-size: .85rem; color: var(--muted); font-weight: 600; }
.grid .reason { font-size: .8rem; color: var(--muted); max-width: 32rem; }
.inbox tr.unread td { font-weight: 600; }
.inbox td.src { color: var(--muted); font-size: .85rem; white-space: nowrap; }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: .3rem 1rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-word; }
.actions { display: flex; gap: .6rem; flex-wrap: wrap; margin: 1rem 0; }
.pager { display: flex; gap: 1rem; margin: 1rem 0; }
textarea.links { width: 100%; font-family: ui-monospace, monospace; font-size: .85rem; }
pre.doc { background: var(--card); border: 1px solid var(--line); padding: .8rem; border-radius: 8px; overflow-x: auto; font-size: .85rem; }
iframe.mailbody { width: 100%; height: 70vh; border: 1px solid var(--line); border-radius: 8px; background: #fff; margin-top: .6rem; }
.attachments { padding-left: 1.2rem; }
@media (max-width: 720px) {
  .grid { display: block; overflow-x: auto; }
  .kv { grid-template-columns: 1fr; }
  .row { flex-wrap: wrap; }
}