:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #2a2f3a;
  --text: #e6e9ef;
  --muted: #8b93a3;
  --accent: #5b8cff;
  --up: #3fbf7f;
  --down: #ef5f5f;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body.center { display: grid; place-items: center; min-height: 100vh; }

a { color: var(--accent); }

h1, h2 { margin: 0; font-weight: 600; }
h2 { font-size: 15px; }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.right { text-align: right; }
.empty { padding: 14px 4px; }
.error { color: var(--down); }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 5;
}

.brand { font-weight: 700; letter-spacing: .2px; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 22px;
  display: grid;
  gap: 18px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }

.btn {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  font: inherit;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn.small { padding: 5px 9px; font-size: 12px; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.ghost { background: transparent; }
.btn.danger { border-color: #5a2b2b; color: #ff9a9a; background: transparent; }

input {
  width: 100%;
  padding: 9px 11px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
}
input:focus { outline: none; border-color: var(--accent); }

.login-card { width: 320px; text-align: center; }
.login-card h1 { margin-bottom: 6px; }
.login-card form { display: grid; gap: 10px; margin-top: 16px; }

.add-form { display: flex; gap: 10px; margin-bottom: 14px; }

.endpoint-row { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }

.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 7px;
  word-break: break-all;
}
.endpoint-row .code { flex: 1; }

.live-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.live-list li { display: flex; align-items: center; gap: 10px; }
.rank {
  display: inline-grid; place-items: center;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--panel-2); border: 1px solid var(--border);
  font-size: 12px; color: var(--muted);
}

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table th { color: var(--muted); font-weight: 500; font-size: 12px; }
.table tr:last-child td { border-bottom: none; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; border: 1px solid var(--border); }
.badge.up { color: var(--up); border-color: #23503a; }
.badge.down { color: var(--down); border-color: #5a2b2b; }
.badge.off { color: var(--muted); }

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
}
.toast.error { border-color: var(--down); color: #ff9a9a; }