body {
  font-family: system-ui, -apple-system, sans-serif;
  margin: 0;
  background: #f5f5f5;
  color: #222;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background: #1f2937;
  color: #fff;
}

header form { margin: 0; }

main {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.5rem; border-bottom: 1px solid #eee; vertical-align: middle; }

button {
  cursor: pointer;
  border: 1px solid #ccc;
  background: #fff;
  border-radius: 4px;
  padding: 0.35rem 0.75rem;
  margin-left: 0.25rem;
}

button.danger { border-color: #c0392b; color: #c0392b; }
button:disabled { opacity: 0.5; cursor: default; }

.muted { color: #888; font-size: 0.9em; }

#status {
  min-height: 1.5em;
  margin-bottom: 0.75rem;
  font-size: 0.95em;
}
#status.ok { color: #2a7a2a; }
#status.error { color: #c0392b; }

.login-box {
  max-width: 320px;
  margin: 4rem auto;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 1.5rem;
}
.login-box label { display: block; margin-bottom: 0.75rem; }
.login-box input { width: 100%; padding: 0.4rem; box-sizing: border-box; }
.login-box .error { color: #c0392b; }