/* schema pack — app chrome, tool first */
:root {
  --bg: #eceff3;
  --paper: #ffffff;
  --ink: #1a1d23;
  --muted: #5b616b;
  --line: #c9ced6;
  --accent: #c2410c;
  --accent-hover: #9a3412;
  --field: #ffffff;
  --code: #16181d;
  --code-ink: #e6e8ec;
  --ok: #215c32;
  --warn: #7a4a00;
  --err: #8b1e1e;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 7px;
  --measure: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  font-size: 16px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--ink); }
a:hover { text-decoration: underline; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: #fff; padding: 0.4rem 0.7rem; z-index: 100;
}
.skip-link:focus { left: 0.6rem; top: 0.6rem; }

.site-nav {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.site-nav .inner {
  width: min(var(--measure), 94%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.85rem 0;
  position: relative;
}
.logo {
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--ink);
  text-decoration: none;
}
.logo:hover { text-decoration: none; }
.nav-links { display: flex; gap: 1.1rem; flex-wrap: wrap; align-items: center; }
.nav-links a { color: var(--muted); font-size: 0.86rem; text-decoration: none; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #8b919c;
  border-radius: var(--radius);
  padding: 0.5rem 0.85rem;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  background: transparent;
  color: var(--ink);
  line-height: 1.2;
}
.btn:hover { text-decoration: none; background: #e1e5eb; }
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  padding: 0.85rem 1.2rem;
  font-size: 1rem;
  font-weight: 650;
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-secondary { background: transparent; }
.btn-ghost { border-color: transparent; background: transparent; color: var(--muted); }
.btn-ghost:hover { background: #e1e5eb; }
.btn-dark {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
  padding: 0.85rem 1.2rem;
  font-size: 1rem;
  font-weight: 650;
}
.btn-dark:hover { background: #0d0f13; color: #fff; }
.btn-sm { padding: 0.38rem 0.65rem; font-size: 0.8rem; font-weight: 550; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.app {
  width: min(var(--measure), 94%);
  margin: 0 auto;
  padding: 1.35rem 0 3.5rem;
}
.app-title {
  margin: 0 0 1.15rem;
}
.app-title h1 {
  font-size: 1.85rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 0.4rem;
  line-height: 1.15;
}
.app-title .deck {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
  max-width: 40rem;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.35rem;
  align-items: start;
  min-height: calc(100vh - 11rem);
}

fieldset {
  border: 1px solid var(--line);
  background: var(--paper);
  margin: 0 0 1rem;
  padding: 1rem 1.05rem 1.1rem;
  border-radius: var(--radius);
}
legend {
  padding: 0 0.3rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--ink);
}
.field { margin-bottom: 0.7rem; }
.field:last-child { margin-bottom: 0; }
.field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 650;
  margin-bottom: 0.22rem;
}
.field .hint,
.hint { display: block; font-size: 0.75rem; color: var(--muted); font-weight: 400; margin-top: 0.18rem; }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; }
input[type="text"], input[type="url"], input[type="number"], select, textarea {
  width: 100%;
  border: 1px solid #8b919c;
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  padding: 0.5rem 0.55rem;
  font: inherit;
  font-size: 0.92rem;
}
textarea { min-height: 68px; resize: vertical; }
input:focus, select:focus, textarea:focus {
  outline: 2px solid #c2410c33;
  border-color: var(--ink);
}

.faq-list { display: flex; flex-direction: column; gap: 0.55rem; margin: 0.3rem 0 0.55rem; }
.faq-pair {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.6rem 0.65rem;
  background: #f7f8fa;
}
.faq-pair .faq-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 0.35rem; font-size: 0.75rem; color: var(--muted);
}
.form-actions { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.25rem 0 0; }

.output-pane {
  position: sticky;
  top: 0.85rem;
  background: var(--code);
  color: var(--code-ink);
  border-radius: 9px;
  padding: 1rem 1.05rem 1.1rem;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 1.7rem);
}
.out-head {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 0.5rem; flex-wrap: wrap; margin: 0 0 0.55rem;
}
.out-head h2 {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #c5cad3;
}
.out-head .meta { font-family: var(--mono); font-size: 0.72rem; color: #8b919c; }
.out-actions { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.45rem 0 0.7rem; }
.out-actions .btn-secondary,
.out-actions a.btn-secondary {
  border-color: #5b616b;
  color: #e6e8ec;
}
.out-actions a.btn-secondary:hover,
.out-actions .btn-secondary:hover { background: #2a2e36; }
#jsonOutput {
  width: 100%;
  flex: 1;
  min-height: 320px;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.45;
  background: #101217;
  color: var(--code-ink);
  border: 1px solid #2c313a;
  border-radius: var(--radius);
  padding: 0.75rem 0.8rem;
  white-space: pre;
  overflow: auto;
}
.warnings { display: flex; flex-direction: column; gap: 0.3rem; }
.warn-item { font-size: 0.75rem; padding: 0.35rem 0.45rem; border-radius: 6px; background: #1f232b; }
.warn-item.err { color: #f0a8a8; }
.warn-item.warn { color: #e6c27a; }
.warn-item.ok { color: #9dcea8; }
.warn-item.info { color: #9aa1ad; }
.copy-toast { display: none; margin-top: 0.5rem; font-size: 0.8rem; color: #9dcea8; }
.copy-toast.show { display: block; }

.note {
  color: var(--muted);
  font-size: 0.86rem;
  margin: 1.75rem 0 0;
}
code, .inline-code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: #dde1e8;
  padding: 0.05rem 0.25rem;
  border-radius: 4px;
}
.output-pane code { background: #2a2e36; color: #e6e8ec; }

.notes, .faq-block {
  width: min(720px, 92%);
  margin: 0 auto;
  padding: 0.25rem 0 1.5rem;
}
.page { width: min(720px, 92%); margin: 0 auto; }
.page.app { width: min(var(--measure), 94%); }

h2 {
  font-size: 1.15rem;
  font-weight: 650;
  margin: 1.6rem 0 0.5rem;
}
.notes ol, .notes ul { margin: 0.3rem 0 0.8rem; padding-left: 1.2rem; }
.notes li { margin: 0.3rem 0; }

.faq details { border-bottom: 1px solid var(--line); padding: 0.7rem 0; }
.faq summary { cursor: pointer; font-weight: 650; font-size: 0.95rem; }
.faq details p { margin: 0.4rem 0 0; color: var(--muted); }

.prose { padding: 1.5rem 0 3.5rem; }
.prose h1 {
  font-size: clamp(1.7rem, 3vw, 2.15rem);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0.4rem 0 0.8rem;
  text-transform: none;
}
.prose p, .prose li { color: var(--ink); }
.prose strong { font-weight: 650; }
.prose pre {
  background: var(--code);
  color: var(--code-ink);
  border-radius: var(--radius);
  padding: 0.85rem 0.95rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
}
.prose table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.prose th, .prose td {
  text-align: left; border-bottom: 1px solid var(--line);
  padding: 0.5rem 0.35rem; vertical-align: top;
}
.checklist { list-style: none; padding: 0; }
.checklist li { padding: 0.2rem 0; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.15rem 0 1.9rem;
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.8rem;
}
.site-footer .inner {
  width: min(var(--measure), 94%);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  justify-content: space-between;
}
.site-footer nav { display: flex; gap: 0.9rem; flex-wrap: wrap; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--ink); }

.center-page { min-height: 55vh; padding: 3rem 0; }
.center-page h1 { font-size: 2.4rem; font-weight: 650; margin: 0 0 0.6rem; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 0.28rem 0.55rem;
  cursor: pointer;
  font: inherit;
  font-size: 0.8rem;
}
@media (max-width: 920px) {
  .app-shell {
    grid-template-columns: 1fr;
    min-height: 0;
  }
  .output-pane {
    position: static;
    min-height: 0;
  }
  #jsonOutput { min-height: 280px; }
}
@media (max-width: 640px) {
  .row-2 { grid-template-columns: 1fr; }
  .menu-toggle { display: inline-block; }
  .nav-links {
    display: none;
    position: absolute;
    left: 0; right: 0; top: 100%;
    flex-direction: column;
    align-items: flex-start;
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0.65rem 0.75rem;
    z-index: 20;
  }
  .nav-links.open { display: flex; }
  .btn-primary, .btn-dark { width: 100%; }
}