:root {
  --bg: #ffffff; --fg: #0a0a0a; --muted: #6e6e73; --line: #e5e5ea; --panel: #f5f5f7;
  --accent: #0a0a0a; --accent-fg: #ffffff; --danger: #c4161c; --ok: #1f7a3a; --radius: 12px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #000000; --fg: #f5f5f7; --muted: #8e8e93; --line: #2c2c2e; --panel: #1c1c1e;
          --accent: #f5f5f7; --accent-fg: #000000; --danger: #ff453a; --ok: #30d158; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", sans-serif; }
a { color: inherit; }
.shell { display: grid; grid-template-columns: 200px 1fr; min-height: 100vh; }
nav.side { border-right: 1px solid var(--line); padding: 24px 12px; position: sticky; top: 0; height: 100vh; }
nav.side .brand { font-weight: 700; font-size: 18px; letter-spacing: .02em; padding: 0 12px 20px; }
nav.side .brand small { display: block; font-weight: 500; color: var(--muted); font-size: 12px; letter-spacing: .2em; }
nav.side a { display: block; padding: 8px 12px; border-radius: 8px; text-decoration: none; color: var(--muted); }
nav.side a.on, nav.side a:hover { color: var(--fg); background: var(--panel); }
nav.side form { margin-top: 24px; padding: 0 12px; }
main { padding: 32px 40px; max-width: 1200px; min-width: 0; }
h1 { font-size: 28px; font-weight: 700; margin: 0 0 24px; letter-spacing: -.01em; }
h2 { font-size: 17px; font-weight: 600; margin: 32px 0 12px; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 13px; }
.panel { background: var(--panel); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
.stat { background: var(--panel); border-radius: var(--radius); padding: 16px; }
.stat b { display: block; font-size: 28px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: 13px; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 500; color: var(--muted); font-size: 12px; }
.table-wrap { overflow-x: auto; }
label { display: block; font-size: 13px; color: var(--muted); margin: 0 0 4px; }
.field { margin-bottom: 14px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.row > .field { flex: 1 1 160px; }
input[type=text], input[type=number], input[type=password], input[type=url], select, textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--fg); font: inherit; }
textarea { min-height: 90px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--fg); outline-offset: -1px; }
.check { display: inline-flex; align-items: center; gap: 6px; margin: 0 14px 6px 0; color: var(--fg); font-size: 14px; }
button, .btn { display: inline-block; border: 0; border-radius: 980px; padding: 8px 18px; font: inherit; font-weight: 500;
  background: var(--accent); color: var(--accent-fg); cursor: pointer; text-decoration: none; }
button.ghost, .btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); }
button.danger { background: transparent; color: var(--danger); border: 1px solid var(--line); }
button.small { padding: 4px 12px; font-size: 13px; }
.inline { display: inline; }
.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; background: var(--panel); }
.flash.err { color: var(--danger); }
.flash.ok { color: var(--ok); }
.tag { display: inline-block; padding: 1px 8px; border-radius: 980px; font-size: 12px; border: 1px solid var(--line); white-space: nowrap; }
.tag.active { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.tag.expired, .tag.disabled, .tag.quota_exceeded { color: var(--muted); }
.tag.on { color: var(--ok); border-color: currentColor; }
details { border-top: 1px solid var(--line); padding: 10px 0; }
details > summary { cursor: pointer; list-style: none; display: flex; gap: 12px; align-items: center; }
details > summary::-webkit-details-marker { display: none; }
details > summary::after { content: "编辑"; margin-left: auto; color: var(--muted); font-size: 13px; }
details[open] > summary::after { content: "收起"; }
details .panel { margin-top: 12px; }
.codes-box { width: 100%; min-height: 240px; }
.login { max-width: 360px; margin: 18vh auto; padding: 0 16px; }
.login .brand { font-size: 32px; font-weight: 700; text-align: center; margin-bottom: 4px; }
.login .sub { text-align: center; color: var(--muted); letter-spacing: .3em; margin-bottom: 32px; font-size: 12px; }
.pager { display: flex; gap: 8px; margin-top: 16px; align-items: center; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.filters a { text-decoration: none; }
@media (max-width: 760px) {
  .shell { grid-template-columns: 1fr; }
  nav.side { position: static; height: auto; display: flex; flex-wrap: wrap; gap: 4px; padding: 12px 16px; border-right: 0; border-bottom: 1px solid var(--line); }
  nav.side .brand { width: 100%; padding: 0 0 8px; }
  nav.side form { margin: 0; padding: 0; }
  main { padding: 20px 16px; }
}