:root {
  --bg: #f6f7f9; --card: #ffffff; --text: #16181d; --muted: #5f6673; --line: #e3e6eb;
  --accent: #2f5bea; --accent-text: #ffffff; --danger: #c62f2f; --ok: #1f8a4c; --warn-bg: #fff6e0; --warn-line: #f0d48a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115; --card: #171a21; --text: #e8eaee; --muted: #9aa2b1; --line: #2a2f3a;
    --accent: #6c8cff; --accent-text: #0f1115; --danger: #ff6b6b; --ok: #4cc283; --warn-bg: #2b2516; --warn-line: #5a4a1e;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
}
main { max-width: 640px; margin: 0 auto; padding: 32px 16px 64px; }
.center { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 24px; }
.login { width: 100%; max-width: 380px; text-align: center; }
h1 { font-size: 26px; margin: 0 0 4px; letter-spacing: -0.02em; }
h2 { font-size: 17px; margin: 28px 0 10px; }
.sub { color: var(--muted); margin: 0 0 24px; }
button, .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 600; border-radius: 10px; border: 1px solid var(--line);
  padding: 11px 16px; cursor: pointer; background: var(--card); color: var(--text); text-decoration: none;
}
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.danger { color: var(--danger); }
button.small { padding: 6px 10px; font-size: 13px; font-weight: 500; }
button:disabled { opacity: .55; cursor: default; }
.stack { display: flex; flex-direction: column; gap: 10px; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.msg { margin-top: 14px; min-height: 1.4em; font-size: 14px; }
.msg.error { color: var(--danger); }
.msg.ok { color: var(--ok); }
.banner { background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 12px; padding: 14px 16px; margin-bottom: 16px; }
ul.list { list-style: none; padding: 0; margin: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
ul.list li { padding: 12px 14px; border-top: 1px solid var(--line); }
ul.list li:first-child { border-top: 0; }
.meta { color: var(--muted); font-size: 13px; }
.tag { font-size: 12px; border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; color: var(--muted); }
.divider { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 13px; margin: 6px 0; }
.divider::before, .divider::after { content: ""; flex: 1; border-top: 1px solid var(--line); }
header.top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
main.doc { max-width: 720px; }
main.doc li { margin-bottom: 6px; }
a { color: var(--accent); }
.footer { margin-top: 18px; font-size: 13px; color: var(--muted); }
.footer a { color: var(--muted); }

/* ---------- 대시보드 ---------- */
main.wide { max-width: 1120px; }
.nav { display: flex; align-items: center; gap: 14px; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.node { display: block; color: inherit; text-decoration: none; padding: 18px; }
.node:hover { border-color: var(--accent); }
.node h3 { margin: 0; font-size: 17px; display: flex; align-items: center; gap: 8px; }
.node.offline { opacity: .75; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: var(--muted); flex: none; }
.dot.on { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 25%, transparent); }
.dot.off { background: var(--danger); }
.bar { margin-top: 10px; }
.bar .lbl { display: flex; justify-content: space-between; font-size: 13px; color: var(--muted); }
.bar .track { height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; margin-top: 3px; }
.bar .fill { height: 100%; background: var(--accent); border-radius: 3px; }
.bar .fill.warn { background: #e0a020; }
.bar .fill.crit { background: var(--danger); }
.stats { display: flex; gap: 14px; margin-top: 12px; font-size: 13px; color: var(--muted); flex-wrap: wrap; }
.badge { display: inline-block; font-size: 12px; border-radius: 999px; padding: 1px 8px; background: var(--warn-bg); border: 1px solid var(--warn-line); margin: 8px 4px 0 0; }
.alerts { background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 12px; padding: 12px 16px; margin-bottom: 16px; }
.alerts div { margin: 2px 0; }
.empty { text-align: center; padding: 40px 24px; }
.empty h2 { margin-top: 0; }
dialog { border: 1px solid var(--line); border-radius: 14px; background: var(--card); color: var(--text); padding: 24px; width: min(560px, calc(100vw - 32px)); }
dialog::backdrop { background: rgba(0, 0, 0, .45); }
dialog h2 { margin-top: 0; }
.field { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
input { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--text); }
.row.end { justify-content: flex-end; }
pre.cmd { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px; margin: 0; white-space: pre-wrap; word-break: break-all; font-size: 13px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; padding: 6px 10px; font-size: 13px; font-weight: 500; }
.seg button.on { background: var(--accent); color: var(--accent-text); }
.charts { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.chart { margin: 0; padding: 14px; }
.chart figcaption { font-size: 13px; color: var(--muted); display: flex; justify-content: space-between; }
.chart figcaption b { color: var(--text); }
.chart canvas { width: 100%; height: 120px; display: block; margin-top: 8px; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 760px) { .cols { grid-template-columns: 1fr; } }
dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; padding: 14px 16px; font-size: 14px; }
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; word-break: break-all; }
ul.list li.none { color: var(--muted); font-size: 14px; }
.li-row { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }