:root {
  --bg: #fbfaf7;
  --panel: #ffffff;
  --text: #1f2328;
  --muted: #5f6670;
  --border: #e3e0d8;
  --accent: #c79300;
  --accent-ink: #1f2328;
  --pass: #1a7f37;
  --pass-bg: #e7f5ea;
  --warn: #9a6700;
  --warn-bg: #fff4d6;
  --block: #b42318;
  --block-bg: #fde8e6;
  --info: #3b5b8c;
  --info-bg: #eaf1fb;
  --skip: #6e7781;
  --skip-bg: #eef0f2;
  --code-bg: #f4f2ec;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --panel: #1b1e23;
    --text: #e6e7e9;
    --muted: #9aa1ab;
    --border: #2d3139;
    --accent: #f0b429;
    --accent-ink: #14161a;
    --pass: #5fd07a;
    --pass-bg: #16301f;
    --warn: #f0c35a;
    --warn-bg: #362a0d;
    --block: #ff8a80;
    --block-bg: #3a1614;
    --info: #9fbbe8;
    --info-bg: #1b2638;
    --skip: #a6adb6;
    --skip-bg: #262a31;
    --code-bg: #22262c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--info); }
code, textarea, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
code { background: var(--code-bg); padding: 0 4px; border-radius: 4px; font-size: 0.92em; }

.top {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between;
  padding: 18px 24px 8px; max-width: 1280px; margin: 0 auto;
}
.brand { display: flex; gap: 12px; align-items: center; }
.logo { font-size: 34px; }
h1 { margin: 0; font-size: 26px; letter-spacing: -0.01em; }
.tagline { margin: 0; color: var(--muted); }

.engine {
  display: inline-flex; gap: 8px; align-items: center; font-size: 13px;
  border: 1px solid var(--border); border-radius: 999px; padding: 5px 12px; background: var(--panel);
}
.engine .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--warn); }
.engine.ready .dot { background: var(--pass); }
.engine.failed .dot { background: var(--block); }
.engine.loading .dot { animation: pulse 1.2s infinite ease-in-out; }
@keyframes pulse { 50% { opacity: 0.3; } }

.tabs {
  display: flex; gap: 4px; max-width: 1280px; margin: 8px auto 0; padding: 0 24px;
  border-bottom: 1px solid var(--border); overflow-x: auto;
}
.tab {
  border: none; background: none; color: var(--muted); font: inherit; font-weight: 600;
  padding: 10px 14px; cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap;
}
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

main { max-width: 1280px; margin: 0 auto; padding: 16px 24px 32px; }
.panel[hidden] { display: none; }
.lead { color: var(--muted); margin: 4px 0 16px; max-width: 900px; }

.grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 20px; align-items: start; }
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }

.inputs, .results { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.results { min-height: 240px; }
.placeholder { color: var(--muted); padding: 24px 4px; }

details { border-top: 1px solid var(--border); padding: 8px 0; }
details:first-of-type { border-top: none; }
summary { cursor: pointer; font-weight: 600; margin-bottom: 6px; }

.field { display: flex; flex-direction: column; gap: 4px; margin: 8px 0; font-size: 13px; font-weight: 600; color: var(--muted); }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.row .field { flex: 1 1 140px; }
.hint { font-weight: 400; }
.check-line { display: flex; gap: 8px; align-items: center; font-size: 13px; color: var(--muted); margin: 6px 0 10px; }

input[type="text"], input[type="number"], select, textarea {
  width: 100%; font-size: 13px; color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: 8px; padding: 7px 9px;
}
textarea { resize: vertical; line-height: 1.45; }
select { font-family: inherit; }

button.primary {
  margin-top: 10px; width: 100%; padding: 11px 14px; border: none; border-radius: 8px; cursor: pointer;
  background: var(--accent); color: var(--accent-ink); font: inherit; font-weight: 700;
}
button.primary:disabled { opacity: 0.45; cursor: not-allowed; }

.verdict {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  border-radius: var(--radius); padding: 14px 16px; margin-bottom: 14px; font-weight: 700;
}
.verdict .big { font-size: 24px; letter-spacing: 0.02em; text-transform: uppercase; }
.verdict .sub { font-weight: 500; font-size: 13px; }
.v-pass { background: var(--pass-bg); color: var(--pass); }
.v-warn { background: var(--warn-bg); color: var(--warn); }
.v-block { background: var(--block-bg); color: var(--block); }
.v-error { background: var(--block-bg); color: var(--block); }
.v-skipped { background: var(--skip-bg); color: var(--skip); }

h3 { font-size: 14px; margin: 18px 0 8px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
ul.reasons { list-style: none; padding: 0; margin: 0; }
ul.reasons li { padding: 6px 0; border-bottom: 1px dashed var(--border); font-size: 13.5px; }
.tag { display: inline-block; min-width: 50px; text-align: center; font-size: 11px; font-weight: 700; border-radius: 6px; padding: 1px 6px; margin-right: 8px; }
.tag.BLOCK { background: var(--block-bg); color: var(--block); }
.tag.WARN { background: var(--warn-bg); color: var(--warn); }
.tag.INFO { background: var(--info-bg); color: var(--info); }
.tag.PASS { background: var(--pass-bg); color: var(--pass); }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { border: 1px solid var(--border); padding: 6px 8px; text-align: left; vertical-align: top; }
th { background: var(--code-bg); font-weight: 600; }
td.cell { text-align: center; white-space: nowrap; }
.c-regressed, .c-new_fail, .c-newly_error { background: var(--block-bg); color: var(--block); font-weight: 700; }
.c-newly_skipped { background: var(--warn-bg); color: var(--warn); font-weight: 700; }
.c-fixed { background: var(--pass-bg); color: var(--pass); }
.c-unchanged_fail { background: var(--skip-bg); color: var(--block); }
.c-unchanged_pass { color: var(--pass); }
.c-other { color: var(--skip); }
.legend { font-size: 12px; color: var(--muted); margin-top: 6px; }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; font-size: 13.5px; }
.kv div:nth-child(odd) { color: var(--muted); }
.pill { display: inline-block; font-weight: 700; font-size: 12px; border-radius: 999px; padding: 2px 10px; }
.p-pass { background: var(--pass-bg); color: var(--pass); }
.p-fail, .p-error { background: var(--block-bg); color: var(--block); }
.p-skipped { background: var(--skip-bg); color: var(--skip); }
pre.json { background: var(--code-bg); border-radius: 8px; padding: 10px; overflow: auto; max-height: 360px; font-size: 12px; margin: 0; }
.muted { color: var(--muted); }
.error-box { background: var(--block-bg); color: var(--block); border-radius: 8px; padding: 10px 12px; font-size: 13.5px; }

.prose { max-width: 820px; }
.prose h2 { font-size: 18px; margin: 22px 0 6px; }
.prose li { margin: 4px 0; }

.foot { text-align: center; color: var(--muted); font-size: 13px; padding: 16px 24px 28px; }