:root {
  --bg: #f6f7f9; --panel: #ffffff; --fg: #1b1d21; --muted: #6b7280;
  --border: #e3e6ea; --accent: #2f6feb; --accent-fg: #ffffff;
  --ok: #1a9e5c; --down: #d93a3a; --unknown: #9aa2ad;
  --mono: ui-monospace, Consolas, "D2Coding", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a; --panel: #1c1f25; --fg: #e8eaed; --muted: #9aa2ad;
    --border: #2c313a; --accent: #5b8def; --accent-fg: #0d1117;
    --ok: #3ec27f; --down: #f06a6a; --unknown: #6b7280;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: -apple-system, "Segoe UI", "Malgun Gothic", system-ui, sans-serif;
  font-size: 14px; line-height: 1.5;
}
.hidden { display: none !important; }
.wrap { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

header { border-bottom: 1px solid var(--border); background: var(--panel); }
.head { display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 12px; }
.brand { font-weight: 650; font-size: 16px; letter-spacing: -0.01em; }
.head-right { display: flex; align-items: center; gap: 8px; }
.checked { font-size: 11.5px; color: var(--muted); font-variant-numeric: tabular-nums; }

.btn {
  font: inherit; padding: 7px 14px; border-radius: 7px; cursor: pointer;
  border: 1px solid var(--border); background: var(--panel); color: var(--fg);
  transition: border-color .12s, filter .12s;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); font-weight: 550; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; }
.btn.sm { padding: 5px 11px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.summary { margin: 24px 0 14px; font-size: 13px; color: var(--muted); }
.summary strong { color: var(--fg); font-weight: 600; }

.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); padding-bottom: 40px; }

.card {
  display: block; padding: 16px 18px; background: var(--panel);
  border: 1px solid var(--border); border-radius: 10px;
  text-decoration: none; color: inherit;
  transition: border-color .12s, transform .12s;
}
a.card:hover { border-color: var(--accent); transform: translateY(-1px); }
.card-head { display: flex; align-items: center; gap: 8px; }
.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; background: var(--unknown); }
.dot.up { background: var(--ok); }
.dot.down { background: var(--down); }
.name { font-weight: 600; font-size: 15px; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lock { font-size: 12px; color: var(--muted); }
.card-sub {
  margin-top: 9px; display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
  font-family: var(--mono); font-size: 12px; color: var(--muted);
}
.where { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.stat { flex-shrink: 0; font-variant-numeric: tabular-nums; }
.stat.down { color: var(--down); }
.stat.up { color: var(--ok); }

.empty {
  grid-column: 1 / -1; padding: 48px 24px; text-align: center; color: var(--muted);
  border: 1px dashed var(--border); border-radius: 10px;
}

.login { position: fixed; inset: 0; display: grid; place-items: center; background: var(--bg); padding: 20px; }
.login-box { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 32px; width: 340px; max-width: 100%; }
.login-box h1 { margin: 0; font-size: 20px; }
.login-box .sub { margin: 2px 0 24px; color: var(--muted); font-size: 13px; }
label { display: block; margin-bottom: 14px; font-size: 13px; font-weight: 550; }
label input {
  display: block; width: 100%; margin-top: 5px; padding: 8px 10px; font: inherit;
  background: var(--bg); color: var(--fg); border: 1px solid var(--border); border-radius: 7px;
}
label input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
.login-box .btn { width: 100%; margin-top: 4px; }
.error { color: var(--down); font-size: 12.5px; min-height: 18px; margin: 10px 0 0; }