:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body { font: 16px/1.5 system-ui, sans-serif; margin: 0; }
.wrap { max-width: 900px; margin: 0 auto; padding: 24px; }
.nav { display: flex; gap: 16px; padding-bottom: 16px; border-bottom: 1px solid #8883; margin-bottom: 24px; }
.nav a { text-decoration: none; }
.card { max-width: 360px; margin: 10vh auto; padding: 24px; border: 1px solid #8883; border-radius: 12px; }
form label { display: block; margin: 12px 0; }
input, textarea, button { font: inherit; padding: 8px; border-radius: 8px; border: 1px solid #8886; width: 100%; }
button { cursor: pointer; width: auto; }
.grid { width: 100%; border-collapse: collapse; }
.grid th, .grid td { text-align: left; padding: 10px; border-bottom: 1px solid #8883; vertical-align: top; }
.snippet { width: 100%; font-family: ui-monospace, monospace; font-size: 12px; }
.actions { display: flex; gap: 8px; align-items: center; margin-top: 8px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 8px 12px; border: 1px solid #8886; border-radius: 8px;
       text-decoration: none; cursor: pointer; white-space: nowrap; color: inherit; }
.btn:hover { background: #8881; }
.hint { opacity: .7; }
.preview-frame { border: 1px solid #8883; border-radius: 12px; overflow: hidden; height: 80vh; background: #8881; }
.preview-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
.preview-head { margin-bottom: 12px; font-size: 18px; }
@media (max-width: 640px) {
  .wrap { padding: 14px; }
  .preview-frame { height: 86vh; }
}
.progress { height: 10px; background: #8883; border-radius: 999px; overflow: hidden; margin: 16px 0; }
#bar { height: 100%; width: 0; background: #3b82f6; transition: width .2s; }
.msg { min-height: 1.5em; color: #b45309; }