body { font-family: system-ui, sans-serif; margin: 0; background: #f6f7f9; color: #1d2433; }
.wrap { max-width: 880px; margin: 0 auto; padding: 20px; }
header { background: white; border-bottom: 1px solid #ddd; }
.nav { display: flex; align-items: center; justify-content: space-between; }
nav { display: flex; gap: 14px; align-items: center; }
a { color: #1357b5; text-decoration: none; }
.brand { font-weight: 800; color: #111; }
.inline { display: inline; }
.hero, .panel, .cards li, pre { background: white; border: 1px solid #ddd; border-radius: 10px; padding: 18px; }
.cards { list-style: none; padding: 0; display: grid; gap: 10px; }
label { display: block; margin: 10px 0; }
input { width: 100%; box-sizing: border-box; padding: 8px; }
button { padding: 7px 12px; cursor: pointer; }
.tag { margin-left: 8px; font-size: 12px; background: #eee; padding: 3px 6px; border-radius: 6px; }
.error { color: #a40000; }
.ok { color: #176b28; }
.hint { color: #666; }
pre { white-space: pre-wrap; }