* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #e8e8e8;
  color: #1a1a1a;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.card {
  background: #fff;
  border: 1px solid #d4d4d4;
  border-radius: 8px;
  padding: 28px;
  width: 100%;
  max-width: 420px;
}
.card.wide { max-width: 620px; }
h1 { font-size: 20px; margin-bottom: 20px; }
h2 { font-size: 16px; margin: 20px 0 12px; }
label { display: block; font-size: 13px; margin: 12px 0 4px; }
input {
  width: 100%;
  padding: 9px 10px;
  font-size: 14px;
  border: 1px solid #b5b5b5;
  border-radius: 6px;
}
input:focus { outline: 2px solid #1a1a1a; outline-offset: -1px; }
button {
  font-size: 14px;
  padding: 9px 16px;
  border: 1px solid #1a1a1a;
  border-radius: 6px;
  background: #1a1a1a;
  color: #fff;
  cursor: pointer;
}
button:hover { background: #333; }
button.ghost { background: #fff; color: #1a1a1a; }
button.ghost:hover { background: #f0f0f0; }
button.small { padding: 5px 10px; font-size: 12px; }
button:disabled { opacity: 0.5; cursor: default; }
.row { display: flex; gap: 8px; margin-top: 16px; }
.row button { flex: 1; }
.error { color: #b00020; font-size: 13px; margin-top: 12px; min-height: 18px; }
.topbar { display: flex; justify-content: space-between; align-items: center; }
table { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 8px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid #e0e0e0; }
th { font-weight: 600; }
td.key { font-family: ui-monospace, Consolas, monospace; }
.off { color: #b00020; }
.on { color: #0a7a2f; }
.empty { font-size: 13px; color: #555; margin-top: 8px; }
.hidden { display: none; }