:root {
  color-scheme: light dark;
  --bg: #f4f5f7; --card: #ffffff; --text: #1c2330; --muted: #5d6778; --line: #d9dde4;
  --accent: #1f5fbf; --accent-text: #ffffff; --ok: #1a7f4b; --off: #6b7482; --bad: #b3261e; --code: #eef2f8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181f; --card: #1d232d; --text: #e7ebf1; --muted: #9aa5b5; --line: #323a47;
    --accent: #6ea4f4; --accent-text: #0e1420; --ok: #58c48a; --off: #8892a0; --bad: #f08a82; --code: #262e3a;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.45 system-ui, "Segoe UI", sans-serif; }
[hidden] { display: none !important; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 20px; border-bottom: 1px solid var(--line); background: var(--card); }
.top h1 { margin: 0; font-size: 18px; }
#account { display: flex; align-items: center; gap: 12px; color: var(--muted); }
main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 48px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
#admin { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; }
.card.narrow { max-width: 420px; width: 100%; margin: 24px auto 0; display: grid; gap: 12px; }
h2 { margin: 0 0 6px; font-size: 16px; }
.heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.hint { color: var(--muted); font-size: 13px; margin: 0 0 10px; }
.message { margin: 0; padding: 10px 14px; border-radius: 8px; border: 1px solid var(--bad); color: var(--bad); background: var(--card); }
label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
input, textarea { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; min-width: 0; width: 100%; }
input:focus-visible, textarea:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button { font: inherit; cursor: pointer; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-text); border-radius: 6px; padding: 8px 14px; white-space: nowrap; }
button.quiet { background: transparent; color: var(--accent); border-color: var(--line); padding: 5px 10px; }
button.danger { color: var(--bad); }
button:disabled { opacity: .5; cursor: default; }
.row { display: flex; flex-wrap: wrap; align-items: end; gap: 12px; }
.row label { flex: 1 1 180px; }
.row .grow { flex: 2 1 240px; }
.code-box { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 14px; padding: 12px 14px; background: var(--code); border-radius: 8px; }
.code-box code { font: 600 18px/1.2 ui-monospace, Consolas, monospace; letter-spacing: .06em; user-select: all; }
.code-box .hint { margin: 0; }
#pending { margin: 12px 0 0; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; font-weight: 600; color: var(--muted); white-space: nowrap; }
td.number, td code { font-family: ui-monospace, Consolas, monospace; }
td.buttons { white-space: nowrap; text-align: right; }
td.buttons button { margin-left: 4px; }
td .sub { display: block; color: var(--muted); font-size: 12px; }
.status { font-weight: 600; white-space: nowrap; }
.status.online { color: var(--ok); }
.status.offline { color: var(--off); }
.status.revoked { color: var(--bad); }
dialog { border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--text); padding: 20px; width: min(440px, calc(100vw - 32px)); }
dialog::backdrop { background: rgba(0, 0, 0, .45); }
dialog form { display: grid; gap: 12px; }
.actions { display: flex; justify-content: flex-end; gap: 8px; }