:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1d2328;
  --muted: #66717c;
  --line: #e3e7eb;
  --input: #ffffff;
  --input-line: #c9d0d6;
  --accent: #1565c0;
  --accent-ink: #ffffff;
  --danger: #c62828;
  --danger-soft: #fdecec;
  --ok: #2e7d32;
  --ok-soft: #e9f5ea;
  --warn-soft: #fff4e5;
  --hover: #eef3f9;
  --shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121518;
    --card: #1b1f23;
    --text: #e6e9ec;
    --muted: #9aa4ad;
    --line: #2c3238;
    --input: #14181b;
    --input-line: #3a424a;
    --accent: #5b9df0;
    --accent-ink: #0c1420;
    --danger: #ef6b6b;
    --danger-soft: #3a1f1f;
    --ok: #6cc070;
    --ok-soft: #1d3020;
    --warn-soft: #3a2f1c;
    --hover: #232a31;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
main.wrap { padding-top: 20px; padding-bottom: 48px; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
.right { text-align: right; }

/* header */
.top { background: var(--card); border-bottom: 1px solid var(--line); }
.top-inner { display: flex; align-items: center; justify-content: space-between;
             gap: 4px 12px; min-height: 52px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
.brand { font-weight: 650; color: var(--text); text-decoration: none; display: flex;
         align-items: center; gap: 8px; }
.brand-mark { width: 12px; height: 12px; border-radius: 3px; background: var(--accent); }
nav { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; padding: 4px 0; }
nav a[aria-current="page"] { color: var(--text); font-weight: 600;
                              box-shadow: inset 0 -2px 0 var(--accent); }
nav .who { color: var(--muted); font-size: .9rem; }

/* cards */
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px;
        box-shadow: var(--shadow); padding: 18px 20px 20px; margin-bottom: 18px; min-width: 0; }
.card h1 { font-size: 1.3rem; margin: 0 0 8px; }
.card h2 { font-size: 1.05rem; margin: 0 0 6px; display: flex; align-items: center; gap: 8px; }
.narrow { max-width: 440px; }
.center-card { margin: 8vh auto 0; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.grid2 > .card { margin-bottom: 0; }
.grid2 + .card, .grid2 + section { margin-top: 18px; }
@media (max-width: 820px) {
  .grid2 { grid-template-columns: 1fr; }
}
.count { font-size: .8rem; font-weight: 600; color: var(--muted); background: var(--hover);
         border-radius: 999px; padding: 0 8px; }

.status-line { margin: 0 0 16px; color: var(--muted); font-size: .9rem; }
.status-line .sep { margin: 0 6px; }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.dot.on { background: var(--ok); }
.dot.off { background: var(--danger); }

/* forms */
label { display: block; font-size: .85rem; font-weight: 600; margin: 12px 0 4px; }
input {
  width: 100%; font: inherit; color: var(--text); background: var(--input);
  border: 1px solid var(--input-line); border-radius: 8px; padding: 9px 11px;
}
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.combo-input { text-transform: uppercase; font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
.combo-input::placeholder { text-transform: none; font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
fieldset { border: 0; padding: 0; margin: 10px 0 0; }
legend { font-size: .85rem; font-weight: 600; padding: 0; margin-bottom: 4px; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 400; margin: 4px 0;
         font-size: .9rem; word-break: break-all; }
.check input { width: auto; }

.btn {
  font: inherit; font-weight: 600; border-radius: 8px; padding: 9px 16px; cursor: pointer;
  border: 1px solid var(--input-line); background: var(--card); color: var(--text);
}
.btn:hover:not(:disabled) { background: var(--hover); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover:not(:disabled) { filter: brightness(1.08); background: var(--accent); }
.btn.danger { background: #c62828; border-color: #c62828; color: #fff; }
.btn.danger:hover:not(:disabled) { filter: brightness(1.1); background: #c62828; }
.btn.danger-outline { color: var(--danger); }
.btn.small { padding: 4px 10px; font-size: .85rem; }
.btn.wide { width: 100%; margin-top: 14px; }
.block-form .btn, #invite-create .btn { margin-top: 14px; }
button.link { background: none; border: 0; color: var(--accent); font: inherit; cursor: pointer; padding: 0; }
.copy-row { display: flex; gap: 8px; }
.copy-row input { flex: 1; min-width: 0; }

/* combobox */
.combo { position: relative; }
.combo-list {
  position: absolute; z-index: 10; left: 0; right: 0; top: calc(100% + 4px);
  margin: 0; padding: 4px; list-style: none; max-height: 320px; overflow-y: auto;
  background: var(--card); border: 1px solid var(--input-line); border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
}
.combo-list li { padding: 7px 9px; border-radius: 6px; cursor: pointer; display: flex;
                 align-items: baseline; justify-content: space-between; gap: 10px; }
.combo-list li[aria-selected="true"] { background: var(--hover); }
.combo-list li .cs { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-weight: 600; }
.combo-list li .cs mark { background: none; color: var(--accent); }
.combo-list li .meta { color: var(--muted); font-size: .8rem; text-align: right;
                       overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.combo-list li.empty { color: var(--muted); cursor: default; }
.combo-list li.more { color: var(--muted); cursor: default; font-size: .8rem; }

.om-details { margin-top: 10px; padding: 10px 12px; border: 1px solid var(--line);
              border-radius: 8px; background: var(--bg); }
.om-nodes { font-size: .85rem; }
.chip { display: inline-block; font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
        font-size: .8rem; padding: 1px 7px; margin: 2px 4px 2px 0; border-radius: 999px;
        background: var(--card); border: 1px solid var(--line); }
.chip.online { border-color: var(--ok); color: var(--ok); }

/* tags */
.tag { display: inline-block; font-size: .75rem; font-weight: 600; padding: 1px 8px;
       border-radius: 999px; background: var(--hover); color: var(--muted); white-space: nowrap; }
.tag-node { background: var(--danger-soft); color: var(--danger); }
.tag-operator { background: var(--danger-soft); color: var(--danger); }
.tag-email { background: var(--warn-soft); color: var(--text); }
.badge-blocked { font-size: .7rem; font-weight: 700; color: var(--danger); margin-left: 6px; }
.dot-online { width: 7px; height: 7px; border-radius: 50%; background: var(--ok);
              display: inline-block; margin-right: 5px; vertical-align: middle; }

/* tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin-top: 6px; }
th, td { text-align: left; padding: 8px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
table.compact td, table.compact th { padding: 6px; }

/* messages */
.msg, .result { margin: 12px 0 0; padding: 9px 12px; border-radius: 8px; font-size: .9rem;
                background: var(--hover); }
.msg.error, .result.error { background: var(--danger-soft); color: var(--danger); }
.msg.ok, .result.ok { background: var(--ok-soft); color: var(--ok); }
.result pre, details pre { white-space: pre-wrap; word-break: break-word; font-size: .8rem;
  background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 6px;
  padding: 8px 10px; margin: 8px 0 0; }
.result .btn { margin-top: 8px; }
details summary { cursor: pointer; color: var(--muted); font-size: .8rem; }

.events { list-style: none; margin: 0; padding: 0; }
.events li { display: grid; grid-template-columns: 130px 1fr; gap: 10px; padding: 6px 0;
             border-bottom: 1px solid var(--line); font-size: .9rem; }
.events li:last-child { border-bottom: 0; }
.events .when { color: var(--muted); font-size: .85rem; }
@media (max-width: 560px) {
  .events li { grid-template-columns: 1fr; gap: 0; }
}