:root {
  --bg: #f4f6f9;
  --card: #fff;
  --text: #1a1f36;
  --muted: #6b7280;
  --accent: #1f4e79;
  --ok: #0d7a3e;
  --bad: #b42318;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  background: var(--accent);
  color: #fff;
  padding: 1.25rem 2rem;
}

header h1 { margin: 0 0 0.25rem; font-size: 1.5rem; }
.subtitle { margin: 0; opacity: 0.9; font-size: 0.95rem; }

main {
  max-width: 960px;
  margin: 1.5rem auto;
  padding: 0 1rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

.card h2 { margin: 0 0 1rem; font-size: 1.1rem; }

.card.actions {
  background: #eff6ff;
  border-color: #93c5fd;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 0.5rem;
}

button.primary { background: var(--accent); }

.action-status {
  margin-top: 0.85rem;
  padding: 0.65rem 0.85rem;
  border-radius: 6px;
  background: #fff;
  border: 1px solid var(--border);
  font-size: 0.9rem;
}

.action-status.error {
  background: #fef2f2;
  border-color: #fecaca;
  color: var(--bad);
}

.row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.row h2 { margin: 0; }

label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

input {
  font: inherit;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-weight: 400;
}

button {
  font: inherit;
  padding: 0.55rem 1rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

button:hover { filter: brightness(1.08); }
button.secondary { background: #4b5563; }
button.small { padding: 0.35rem 0.65rem; font-size: 0.85rem; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 0.6rem 0.5rem; border-bottom: 1px solid var(--border); }
th { font-size: 0.8rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.03em; }

.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
}
.badge.online { background: #d1fae5; color: var(--ok); }
.badge.offline { background: #fee2e2; color: var(--bad); }

.result {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: #eff6ff;
  border-radius: 6px;
  font-family: Consolas, monospace;
}
.result.hidden { display: none; }

.output {
  margin: 0;
  padding: 1rem;
  background: #111827;
  color: #e5e7eb;
  border-radius: 6px;
  max-height: 280px;
  overflow: auto;
  font-size: 0.8rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.muted { color: var(--muted); }