:root {
  --bg: #f7f8fa;
  --fg: #1f2328;
  --muted: #57606a;
  --border: #d0d7de;
  --border-soft: #eaeef2;
  --accent: #0969da;
  --accent-soft: #ddf4ff;
  --accent-hover: #0860c4;
  --green: #1a7f37;
  --green-soft: #dafbe1;
  --red: #cf222e;
  --red-soft: #ffebe9;
  --amber: #9a6700;
  --amber-soft: #fff8c5;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", monospace;
  --shadow: 0 1px 2px rgba(0,0,0,0.04);
}

* { box-sizing: border-box; }
body {
  margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 14px; line-height: 1.5; color: var(--fg); background: var(--bg);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 20px; background: white; border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.topbar nav { display: flex; gap: 12px; align-items: center; }
.brand a { font-weight: 600; color: var(--fg); font-size: 16px; }

main { padding: 24px; max-width: 1200px; margin: 0 auto; }

h1 { margin: 0 0 8px 0; font-size: 22px; font-weight: 600; }
h2 { margin: 16px 0 8px 0; font-size: 14px; color: var(--muted); font-weight: 500; }

.card {
  background: white; border: 1px solid var(--border); border-radius: 8px;
  padding: 20px; margin-bottom: 16px;
}

.btn {
  display: inline-block; padding: 6px 14px; border: 1px solid var(--border);
  background: white; border-radius: 6px; cursor: pointer; font-size: 14px;
  color: var(--fg); font-family: inherit; line-height: 1.5;
}
.btn:hover { background: var(--accent-soft); border-color: var(--accent); text-decoration: none; }
.btn-primary { background: var(--accent); color: white; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); color: white; }
.btn-ghost { background: transparent; border: none; color: var(--muted); padding: 6px 10px; cursor: pointer; font-size: 14px; font-family: inherit; }
.btn-ghost:hover { color: var(--fg); }

.muted { color: var(--muted); }
.code { font-family: var(--mono); font-size: 13px; }

form.stacked { display: flex; flex-direction: column; gap: 10px; max-width: 400px; }
form.stacked label { font-size: 13px; font-weight: 500; }
form.stacked input, form.stacked select, form.stacked textarea {
  padding: 8px 10px; font-size: 14px; border: 1px solid var(--border);
  border-radius: 6px; font-family: inherit; width: 100%;
}
form.stacked input:focus, form.stacked select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
form.stacked .field-help { color: var(--muted); font-size: 12px; margin-top: -6px; }
form.stacked button { align-self: flex-start; }

table.grid { width: 100%; border-collapse: collapse; background: white; }
table.grid th, table.grid td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border-soft); }
table.grid th { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 500; }
table.grid tr:hover td { background: #fafbfc; }

.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 13px; }
.flash.ok { background: var(--green-soft); color: var(--green); }
.flash.err { background: var(--red-soft); color: var(--red); }
.flash.warn { background: var(--amber-soft); color: var(--amber); }

.empty {
  text-align: center; padding: 60px 20px; background: white;
  border: 2px dashed var(--border); border-radius: 8px; color: var(--muted);
}
.empty h3 { margin: 0 0 8px 0; color: var(--fg); }