:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1f2328;
  --muted: #656d76;
  --border: #d8dee4;
  --accent: #2557a7;
  --accent-text: #ffffff;
  --danger: #b42318;
  --ok-bg: #e7f5ec; --ok-text: #1a6b3c;
  --warn-bg: #fff6e0; --warn-text: #7a5300;
  --error-bg: #fdecea; --error-text: #8c1d18;
  --unread: #eef3fc;
  --radius: 8px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181c; --surface: #1e2227; --text: #e6e8eb; --muted: #9aa3ad; --border: #343a42;
    --accent: #6b9cf0; --accent-text: #0d1117; --danger: #f07167;
    --ok-bg: #173523; --ok-text: #8fd6a8; --warn-bg: #3a2e10; --warn-text: #f3cf7a;
    --error-bg: #3d1a18; --error-text: #f5a39b; --unread: #1d2a3d;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.6 system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.4rem; margin: 0 0 16px; }
h2 { font-size: 1.05rem; margin: 0 0 12px; }
h3 { font-size: .95rem; margin: 20px 0 8px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; }

.topbar {
  display: flex; align-items: center; gap: 24px; padding: 0 20px; height: 52px;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.topbar .brand { font-weight: 700; color: var(--text); }
.topbar nav { display: flex; gap: 16px; flex: 1; }
.topbar nav a { color: var(--text); }
.topbar .me { display: flex; gap: 12px; align-items: center; }

.page { max-width: 1100px; margin: 0 auto; padding: 24px 16px 48px; }
.auth { max-width: 1100px; margin: 0 auto; padding: 8vh 16px; }
.brand-lg { text-align: center; letter-spacing: .05em; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; min-width: 0; }
.card.narrow { max-width: 440px; margin: 0 auto; }
.card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 12px; }
.card-head h1, .card-head h2 { margin: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.grid .wide { grid-column: 1 / -1; }
.split { display: grid; grid-template-columns: minmax(240px, 1fr) 2fr; gap: 16px; align-items: start; }
@media (max-width: 760px) {
  .split { grid-template-columns: 1fr; }
  .topbar { gap: 12px; padding: 0 12px; overflow-x: auto; }
}

form label { display: block; margin-bottom: 12px; font-size: .9rem; color: var(--muted); }
form label input, form label select { display: block; width: 100%; margin-top: 4px; }
form label.check { display: flex; gap: 8px; align-items: center; color: var(--text); }
form label.check input { width: auto; margin: 0; }
input, select, button {
  font: inherit; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 6px; padding: 7px 10px;
}
input:disabled { color: var(--muted); }
button, .button { cursor: pointer; display: inline-block; padding: 7px 14px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text); }
button.primary, .button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.danger { color: var(--danger); }
button.link { background: none; border: none; padding: 0; color: var(--accent); }
button.link.danger, summary.danger { color: var(--danger); }
.button:hover { text-decoration: none; }
form.inline { display: inline; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.row input:not([type=hidden]), .row select { flex: 1; min-width: 120px; }
.row input.short { flex: 0 1 100px; }
.stack { margin-bottom: 10px; }

.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; }
.flash.ok { background: var(--ok-bg); color: var(--ok-text); }
.flash.warn { background: var(--warn-bg); color: var(--warn-text); }
.flash.error { background: var(--error-bg); color: var(--error-text); }

.muted { color: var(--muted); }
.small { font-size: .85rem; }
.nowrap { white-space: nowrap; }
.tag { display: inline-block; font-size: .75rem; padding: 0 8px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); margin-left: 6px; }
.badge { display: inline-block; font-size: .75rem; min-width: 20px; padding: 0 6px; border-radius: 999px; background: var(--accent); color: var(--accent-text); text-align: center; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: .85rem; color: var(--muted); font-weight: 600; }
tr.dim td { color: var(--muted); }
td.ua { max-width: 320px; font-size: .85rem; word-break: break-all; }
table.audit td.detail code { display: block; max-width: 420px; white-space: pre-wrap; word-break: break-all; font-size: .8rem; }
.card { overflow-x: auto; }

.list { list-style: none; margin: 0; padding: 0; }
.list li { display: flex; gap: 10px; align-items: baseline; padding: 8px 4px; border-bottom: 1px solid var(--border); }
.list li > span:first-child { flex: 1; }
.list li.unread { background: var(--unread); }

.tree { list-style: none; margin: 0; padding: 0; }
.tree li { padding: 4px 0; }
.tree li.current > a { font-weight: 700; }
.tree .depth-1 { padding-left: 1.2em; } .tree .depth-2 { padding-left: 2.4em; } .tree .depth-3 { padding-left: 3.6em; }
.tree .depth-4 { padding-left: 4.8em; } .tree .depth-5 { padding-left: 6em; } .tree .depth-6 { padding-left: 7.2em; }
.tree .depth-7 { padding-left: 8.4em; } .tree .depth-8 { padding-left: 9.6em; }
.tree.admin summary { cursor: pointer; }
.org-actions { padding: 10px 0 6px 1em; }

.tabs { display: flex; gap: 4px; margin-bottom: 20px; border-bottom: 1px solid var(--border); }
.tabs a { padding: 8px 14px; color: var(--muted); border-bottom: 2px solid transparent; }
.tabs a.active { color: var(--text); border-bottom-color: var(--accent); }

dl.meta { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin: 20px 0 0; font-size: .9rem; }
dl.meta dt { color: var(--muted); }
dl.meta dd { margin: 0; }

.qr { display: flex; justify-content: center; margin: 16px 0; }
.qr svg { width: 220px; height: 220px; background: #fff; padding: 6px; border-radius: 6px; }
.secret { word-break: break-all; }
.steps { padding-left: 1.4em; }
.codes { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; list-style: none; padding: 0; margin: 16px 0; }
.codes code { font-size: 1.05rem; }
.temp-password code { font-size: 1.3rem; padding: 6px 12px; background: var(--bg); border-radius: 6px; user-select: all; }
.hint { margin: 16px 0; font-size: .9rem; }
.pager { display: flex; gap: 16px; justify-content: center; }
.filters { margin-bottom: 16px; }