/* json-schema-compat — own lightweight brand (NOT polyatic.css).
   Schema-blue accent on a cool neutral; light + dark via
   prefers-color-scheme, with a manual [data-theme] override. */

:root {
  --blue: #2f6bff;
  --blue-ink: #1d4fd7;

  --bg: #f5f7fa;
  --panel: #ffffff;
  --panel-2: #eef2f7;
  --ink: #131722;
  --ink-soft: #49536b;
  --ink-faint: #77809a;
  --border: #dde3ec;
  --border-strong: #c4cddc;
  --field: #ffffff;
  --shadow: 0 1px 2px rgba(19, 23, 34, .05), 0 6px 20px rgba(19, 23, 34, .06);

  --breaking: #d1293d;
  --breaking-bg: #fdecee;
  --review: #8a5a00;
  --review-bg: #fdf3dd;
  --safe: #157a54;
  --safe-bg: #e5f6ee;

  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c0f15;
    --panel: #151a23;
    --panel-2: #1c222e;
    --ink: #edf1f8;
    --ink-soft: #b6bfd2;
    --ink-faint: #8a93a9;
    --border: #29303f;
    --border-strong: #3a4356;
    --field: #101420;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 26px rgba(0, 0, 0, .45);

    --blue: #6b96ff;
    --blue-ink: #8fb0ff;
    --breaking: #ff6b7d;
    --breaking-bg: #35171c;
    --review: #eab55b;
    --review-bg: #33270f;
    --safe: #4fd39a;
    --safe-bg: #12291f;
  }
}

/* manual dark override (toggle) */
:root[data-theme="dark"] {
  --bg: #0c0f15;
  --panel: #151a23;
  --panel-2: #1c222e;
  --ink: #edf1f8;
  --ink-soft: #b6bfd2;
  --ink-faint: #8a93a9;
  --border: #29303f;
  --border-strong: #3a4356;
  --field: #101420;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 26px rgba(0, 0, 0, .45);
  --blue: #6b96ff;
  --blue-ink: #8fb0ff;
  --breaking: #ff6b7d;
  --breaking-bg: #35171c;
  --review: #eab55b;
  --review-bg: #33270f;
  --safe: #4fd39a;
  --safe-bg: #12291f;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 20px 40px;
}

/* ---- header ---- */
header.top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 11px; }
.logo {
  height: 34px; flex: 0 0 auto;
  padding: 0 8px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--blue), #17b2c9);
  display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 14px;
  font-family: var(--mono);
  box-shadow: 0 2px 8px rgba(47, 107, 255, .35);
}
h1 { font-size: 1.24rem; margin: 0; letter-spacing: -.01em; }
h1 .accent { color: var(--blue); }
.tag { margin: 1px 0 0; color: var(--ink-soft); font-size: .82rem; }

.head-right { display: flex; align-items: center; gap: 10px; }
.theme-btn {
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--ink-soft);
  border-radius: 8px;
  padding: 5px 12px;
  font-size: .8rem;
  cursor: pointer;
}
.theme-btn:hover { color: var(--ink); border-color: var(--ink-faint); }

/* ---- trust line ---- */
.trust {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 0 12px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--panel);
  color: var(--ink-soft);
  font-size: .82rem;
}
.trust svg { width: 16px; height: 16px; flex: 0 0 auto; color: var(--safe); }

/* ---- editors ---- */
.editors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.pane {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.pane-head {
  padding: 8px 12px 6px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
}
.side { display: flex; align-items: center; gap: 8px; min-width: 0; }
.dot { width: 9px; height: 9px; border-radius: 50%; flex: 0 0 auto; }
.pane.old .dot { background: var(--ink-faint); }
.pane.new .dot { background: var(--blue); }
.label { font-weight: 600; font-size: .86rem; }
.label small { display: block; font-weight: 400; color: var(--ink-faint); font-size: .72rem; }

.pane textarea {
  display: block;
  width: 100%;
  border: 0;
  outline: none;
  resize: vertical;
  min-height: 208px;
  padding: 10px 12px;
  background: var(--field);
  color: var(--ink);
  font-family: var(--mono);
  font-size: .8rem;
  line-height: 1.45;
  tab-size: 2;
}
.pane textarea.bad { box-shadow: inset 0 0 0 2px var(--breaking); }
.pane textarea:focus { box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--blue) 55%, transparent); }
.pane textarea.bad:focus { box-shadow: inset 0 0 0 2px var(--breaking), inset 0 0 0 4px color-mix(in srgb, var(--blue) 40%, transparent); }
.pane-err {
  padding: 6px 12px;
  font-size: .76rem;
  color: var(--breaking);
  background: var(--breaking-bg);
  border-top: 1px solid var(--border);
}

/* ---- toolbar ---- */
.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 12px 0;
}
.summary { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--ink-faint);
  font-size: .76rem;
  padding: 3px 10px;
}
.chip b { font-weight: 700; color: inherit; }
.chip.breaking.on { color: var(--breaking); background: var(--breaking-bg); border-color: transparent; }
.chip.review.on { color: var(--review); background: var(--review-bg); border-color: transparent; }
.chip.safe.on { color: var(--safe); background: var(--safe-bg); border-color: transparent; }
.spacer { flex: 1; }

.btn {
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--ink);
  border-radius: 8px;
  padding: 6px 13px;
  font-size: .82rem;
  cursor: pointer;
}
.btn:hover { border-color: var(--ink-faint); }
.btn.primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
  font-weight: 600;
}
.btn.primary:hover { background: var(--blue-ink); border-color: var(--blue-ink); }
:root[data-theme="dark"] .btn.primary,
:root:not([data-theme="light"]) .btn.primary { color: #fff; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn.primary { background: #2f6bff; border-color: #2f6bff; }
  :root:not([data-theme="light"]) .btn.primary:hover { background: #245ae2; border-color: #245ae2; }
}
:root[data-theme="dark"] .btn.primary { background: #2f6bff; border-color: #2f6bff; }
:root[data-theme="dark"] .btn.primary:hover { background: #245ae2; border-color: #245ae2; }

/* ---- verdict banner (exactly three states) ---- */
.verdict {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px 16px;
  border-radius: 12px 12px 0 0;
  border: 1px solid var(--border);
  border-bottom: 0;
  font-size: .9rem;
}
.verdict[hidden] { display: none; } /* author display:flex would otherwise beat the UA [hidden] rule */
.verdict-word {
  font-weight: 800;
  font-size: 1.02rem;
  text-transform: uppercase;
  letter-spacing: .03em;
}
.verdict-why { color: inherit; opacity: .9; }
.verdict.v-compatible { background: var(--safe-bg); color: var(--safe); border-color: var(--safe); }
.verdict.v-breaking { background: var(--breaking-bg); color: var(--breaking); border-color: var(--breaking); }
.verdict.v-review { background: var(--review-bg); color: var(--review); border-color: var(--review); }

/* ---- result ---- */
.result {
  border-radius: 12px;
  overflow: hidden;
}
.result-body {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0 0 12px 12px;
  box-shadow: var(--shadow);
}
.verdict[hidden] + .result-body { border-radius: 12px; }

.state { padding: 18px 16px; color: var(--ink-soft); font-size: .88rem; }
.state.error { color: var(--breaking); background: var(--breaking-bg); }
.state.ok { color: var(--safe); }

.group { border-bottom: 1px solid var(--border); }
.group:last-child { border-bottom: 0; }
.group-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  font-weight: 700;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.sev-dot { width: 9px; height: 9px; border-radius: 50%; }
.group.breaking .group-head { color: var(--breaking); background: var(--breaking-bg); }
.group.breaking .sev-dot { background: var(--breaking); }
.group.review .group-head { color: var(--review); background: var(--review-bg); }
.group.review .sev-dot { background: var(--review); }
.group.safe .group-head { color: var(--safe); background: var(--safe-bg); }
.group.safe .sev-dot { background: var(--safe); }
.count {
  margin-left: auto;
  font-size: .74rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0 8px;
  opacity: .85;
}

ul.changes { list-style: none; margin: 0; padding: 4px 0; }
ul.changes li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 14px;
  font-size: .84rem;
  flex-wrap: wrap;
}
.path-tag {
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--blue-ink);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 7px;
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}
.kw-tag {
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--ink-faint);
  flex: 0 0 auto;
}
.desc { color: var(--ink-soft); flex: 1 1 240px; min-width: 200px; }

.frame-note {
  margin-top: 10px;
  padding: 8px 12px;
  border: 1px dashed var(--border-strong);
  border-radius: 9px;
  color: var(--ink-faint);
  font-size: .78rem;
}
.frame-note b, .frame-note i { color: var(--ink-soft); }

footer {
  margin-top: 18px;
  color: var(--ink-faint);
  font-size: .78rem;
}
footer code {
  font-family: var(--mono);
  font-size: .74rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0 4px;
}
footer b { color: var(--ink-soft); }
footer p { margin: 0 0 6px; }
footer a { color: var(--blue-ink); }

/* ---- toast ---- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translate(-50%, 14px);
  background: var(--ink);
  color: var(--bg);
  border-radius: 9px;
  padding: 8px 16px;
  font-size: .84rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
  box-shadow: var(--shadow);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---- mobile: stack panes, keep both visible above the fold ---- */
@media (max-width: 760px) {
  .wrap { padding: 12px 12px 32px; }
  .editors { grid-template-columns: 1fr; gap: 9px; }
  .pane textarea { min-height: 128px; font-size: .76rem; }
  .tag { display: none; }
  .trust { margin: 8px 0 10px; padding: 6px 10px; font-size: .76rem; }
  .label small { display: none; }
  h1 { font-size: 1.08rem; }
  .logo { height: 30px; font-size: 12px; }
}