:root { color-scheme: light; font-family: system-ui, sans-serif; background: #f4f6f8; color: #182230; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; }
.panel { width: min(34rem, calc(100% - 2rem)); box-sizing: border-box; padding: 2rem; background: white; border: 1px solid #d9e0e7; border-radius: 12px; box-shadow: 0 12px 30px rgba(24, 34, 48, .08); }
h1 { margin: 0 0 1rem; font-size: 1.5rem; }
.muted { color: #5d6a78; }
.error { color: #b42318; background: #fff1f0; border: 1px solid #f2b8b5; padding: .75rem; border-radius: 8px; }
.scope { margin: 1rem 0; padding: .75rem 1rem; background: #f5f7fa; border-radius: 8px; }
label { display: grid; gap: .35rem; margin: .75rem 0; font-weight: 600; }
input { box-sizing: border-box; width: 100%; padding: .65rem .75rem; border: 1px solid #aeb8c3; border-radius: 6px; font: inherit; }
.actions { display: flex; gap: .75rem; margin-top: 1.25rem; }
button { padding: .65rem 1rem; border: 0; border-radius: 6px; font: inherit; font-weight: 700; cursor: pointer; background: #135dbe; color: white; }
button.secondary { background: #667383; }
button:disabled { opacity: .6; cursor: wait; }