* { box-sizing: border-box; }
body {
  font-family: system-ui, sans-serif;
  background: #f4f5f7;
  margin: 0;
  color: #1a1a1a;
}
.view { max-width: 720px; margin: 0 auto; padding: 24px; }
.card {
  background: #fff;
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
}
h1 { font-size: 1.4rem; margin: 0 0 16px; }
h2 { font-size: 1.1rem; margin: 0 0 12px; }
header { display: flex; justify-content: space-between; align-items: center; max-width: 720px; margin: 24px auto 0; padding: 0 24px; }
label { display: block; margin-bottom: 12px; font-size: .9rem; }
input {
  display: block;
  width: 100%;
  padding: 8px 10px;
  margin-top: 4px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
}
button {
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: .95rem;
}
button:hover { background: #1d4ed8; }
#logout-btn { background: #6b7280; }
table { width: 100%; border-collapse: collapse; margin-bottom: 16px; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid #eee; font-size: .9rem; }
.error { color: #dc2626; font-size: .9rem; }
#extension-form { display: flex; gap: 8px; align-items: flex-start; }
#extension-form input { width: auto; flex: 1; }
#extension-result { font-size: .85rem; color: #059669; word-break: break-all; }