:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --muted-bg: #f5f5f5;
  --border: #e5e5e5;
  --text: #171717;
  --muted: #737373;
  --primary: #006B4F;
  --primary-hover: #005a42;
  --destructive: #dc2626;
  --ok: #15803d;
  --warn: #b45309;
  --radius-sm: 4px;
  --radius-md: 5px;
  --radius-lg: 8px;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

* { box-sizing: border-box; }

body { margin: 0; font-size: 14px; line-height: 1.5; }

a { color: inherit; }

h1 { font-size: 22px; margin: 0 0 4px; font-weight: 600; }
h2 { font-size: 16px; margin: 0 0 12px; font-weight: 600; }
h3 { font-size: 14px; margin: 16px 0 8px; font-weight: 600; }

.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar .brand { font-weight: 700; text-decoration: none; }
.topbar nav { display: flex; gap: 16px; flex: 1; }
.topbar nav a { text-decoration: none; color: var(--muted); }
.topbar nav a:hover { color: var(--text); }

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

.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.buttons { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

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

.card.narrow { max-width: 520px; }
.card.empty { text-align: center; padding: 40px; }

.login { max-width: 380px; margin: 12vh auto 0; text-align: center; }
.login .btn { margin-top: 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover { background: var(--muted-bg); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-hover); }
.btn.danger { background: var(--destructive); border-color: var(--destructive); color: #fff; }
.btn.danger-ghost { color: var(--destructive); }
.btn.ghost { background: var(--surface); }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn.wide { width: 100%; }

form.inline { display: inline-flex; align-items: center; gap: 8px; margin: 0; }

.flash {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  border: 1px solid var(--border);
  background: var(--muted-bg);
}

.flash.ok { border-color: #bbf7d0; background: #f0fdf4; color: var(--ok); }
.flash.bad { border-color: #fecaca; background: #fef2f2; color: var(--destructive); }
.flash ul { margin: 0; padding-left: 18px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-lg); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-weight: 500; color: var(--muted); background: var(--muted-bg); font-size: 13px; }
tbody tr:last-child td { border-bottom: 0; }
tr.dim td { opacity: 0.55; }

.badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  background: var(--muted-bg);
  border: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

.badge.ok { color: var(--ok); border-color: #bbf7d0; background: #f0fdf4; }
.badge.bad { color: var(--destructive); border-color: #fecaca; background: #fef2f2; }
.badge.warn { color: var(--warn); border-color: #fde68a; background: #fffbeb; }
.badge.muted { color: var(--muted); }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.nowrap { white-space: nowrap; }
.error-text { color: var(--destructive); }
.ok-text { color: var(--ok); }
.empty { padding: 24px 0; }

.form fieldset { border: 0; padding: 0; margin: 0 0 20px; }
.form legend { font-weight: 600; margin-bottom: 10px; font-size: 15px; }
.form label { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; font-weight: 500; }
.form input, .form textarea {
  font: inherit;
  font-weight: 400;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text);
}
.form input:focus, .form textarea:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.form .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0 16px; }
.form .hint { color: var(--muted); font-size: 12px; margin: -4px 0 0; }
.form .actions { display: flex; gap: 8px; justify-content: flex-end; }

.summary dl { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px 24px; margin: 0; }
dt { color: var(--muted); font-size: 12px; }
dd { margin: 2px 0 0; }
dl.stack { display: grid; gap: 10px; margin: 0; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; overflow-x: auto; }
.tabs a { padding: 8px 14px; text-decoration: none; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs a.active { color: var(--text); border-bottom-color: var(--text); font-weight: 500; }

.two-col { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 20px; }
.two-col .card { margin-bottom: 0; }
.two-col + .card { margin-top: 20px; }

.outline, .sources, .issues { margin: 0; padding-left: 20px; }
.outline li, .sources li, .issues li { margin-bottom: 6px; }
.issues li { color: var(--destructive); }

img.featured { width: 100%; height: auto; border-radius: var(--radius-lg); border: 1px solid var(--border); }
iframe.preview { width: 100%; height: 70vh; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; }

@media (max-width: 640px) {
  .topbar { flex-wrap: wrap; gap: 12px; padding: 12px 16px; }
  .container { padding: 16px; }
}