:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(0, 0, 0, 0.08);
  --fill: rgba(0, 0, 0, 0.04);
  --accent: #0071e3;
  --good: #248a3d;
  --warn: #b25000;
  --bad: #de071c;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --ease: cubic-bezier(0.23, 1, 0.32, 1);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.47 var(--sans);
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: min(980px, calc(100% - 40px));
  margin: 0 auto;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --- nav -------------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 245, 247, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
  gap: 20px;
}

.nav-brand {
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 22px;
  font-size: 13px;
  color: var(--muted);
}

.nav-links a {
  color: inherit;
  text-decoration: none;
}

@media (hover: hover) and (pointer: fine) {
  .nav-links a:hover {
    color: var(--text);
    text-decoration: none;
  }
}

.nav-links a[aria-current="page"] {
  color: var(--text);
  font-weight: 510;
}

@media (prefers-reduced-transparency: reduce) {
  .nav {
    background: var(--bg);
    backdrop-filter: none;
  }
}

/* --- type ------------------------------------------------------------- */

.hero {
  padding: 56px 0 12px;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.tagline {
  margin: 12px 0 0;
  max-width: 38em;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -0.016em;
}

h2 {
  margin: 0 0 6px;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.021em;
}

h3 {
  margin: 28px 0 8px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.016em;
}

.hint,
.lede {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.47;
}

main {
  padding-bottom: 72px;
}

/* --- surfaces --------------------------------------------------------- */

.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px;
  margin: 16px 0;
  box-shadow: 0 1px 0 var(--line);
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 800px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.label {
  font-size: 12px;
  font-weight: 510;
  letter-spacing: 0.01em;
  color: var(--muted);
}

/* --- controls --------------------------------------------------------- */

button {
  appearance: none;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 980px;
  padding: 8px 16px;
  font: 510 13px/1.2 var(--sans);
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: transform 120ms var(--ease), opacity 120ms var(--ease);
}

button:active {
  transform: scale(0.97);
}

button:disabled {
  opacity: 0.4;
  cursor: default;
}

button.ghost {
  background: var(--fill);
  color: var(--text);
}

input[type="text"],
input[type="password"],
input[type="number"] {
  appearance: none;
  width: 100%;
  background: var(--fill);
  border: 0;
  border-radius: 10px;
  color: var(--text);
  padding: 10px 12px;
  font: 15px/1.3 var(--sans);
}

input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 1px;
}

/* --- verdict ---------------------------------------------------------- */

.verdict-head {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.verdict {
  margin-top: 4px;
  font-size: 34px;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.verdict[data-v="human"],
.verdict[data-v="likely_human"] {
  color: var(--good);
}

.verdict[data-v="inconclusive"] {
  color: var(--warn);
}

.verdict[data-v="automation"] {
  color: var(--bad);
}

.note {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.risk {
  font: 600 34px/1.1 var(--mono);
  letter-spacing: -0.03em;
}

.risk-bar {
  height: 4px;
  border-radius: 4px;
  background: var(--fill);
  overflow: hidden;
  margin-top: 10px;
}

.risk-fill {
  height: 100%;
  width: 0;
  background: var(--good);
  transition: width 280ms var(--ease), background-color 280ms var(--ease);
}

.widget-slot {
  margin: 22px 0 4px;
  min-height: 28px;
}

.actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.inline {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

/* --- tables ----------------------------------------------------------- */

table.reasons {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

table.reasons th {
  text-align: left;
  font-size: 12px;
  font-weight: 510;
  color: var(--muted);
  padding: 0 12px 10px 0;
  border-bottom: 1px solid var(--line);
}

table.reasons td {
  padding: 10px 12px 10px 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

table.reasons td.w {
  font-family: var(--mono);
  white-space: nowrap;
  width: 1%;
}

td.w.pos {
  color: var(--bad);
}
td.w.neg {
  color: var(--good);
}
td.w.zero {
  color: var(--muted);
}

table.reasons td.code {
  font-family: var(--mono);
  white-space: nowrap;
  color: var(--accent);
}

table.reasons td.obs {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  word-break: break-word;
}

.clamps {
  margin: 16px 0 0;
  padding: 12px 14px 12px 30px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--warn) 7%, white);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.clamps code {
  color: var(--text);
}

.veto {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--bad) 8%, white);
  color: var(--bad);
  font-size: 14px;
}

.empty {
  color: var(--muted);
  font-size: 14px;
}

/* --- lists ------------------------------------------------------------ */

dl.kv {
  display: grid;
  grid-template-columns: minmax(120px, 34%) 1fr;
  gap: 6px 16px;
  margin: 0 0 16px;
  font-size: 14px;
}

dl.kv dt {
  color: var(--muted);
}

dl.kv dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  word-break: break-word;
}

dd.flag-bad {
  color: var(--bad);
}
dd.flag-good {
  color: var(--good);
}
dd.flag-warn {
  color: var(--warn);
}

ul.evidence {
  margin: 6px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13px;
  font-family: var(--mono);
}

ul.evidence li {
  margin: 4px 0;
}

.groups {
  display: grid;
  gap: 8px;
}

details.group {
  background: var(--fill);
  border-radius: 12px;
  padding: 12px 14px;
}

details.group > summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  list-style: none;
}

details.group > summary::-webkit-details-marker {
  display: none;
}

details.group > summary::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(-45deg);
  transition: transform 160ms var(--ease);
}

details.group[open] > summary::before {
  transform: rotate(45deg);
}

details.group > summary .count {
  color: var(--muted);
  font-weight: 400;
  margin-left: 6px;
  font-size: 13px;
}

details.group dl.kv {
  margin-top: 12px;
  margin-bottom: 2px;
}

.token-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 12px;
}

code,
code.token {
  font-family: var(--mono);
  font-size: 0.88em;
}

code.token {
  color: var(--muted);
  word-break: break-all;
  font-size: 12px;
}

pre,
pre.json {
  margin: 0;
  padding: 16px 18px;
  background: #f2f2f4;
  border-radius: 12px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  overflow-x: auto;
  color: var(--text);
}

.footer {
  padding: 28px 0 48px;
  color: var(--muted);
  font-size: 13px;
}

.footer p {
  margin: 0;
}

/* --- docs ------------------------------------------------------------- */

.doc-layout {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 48px;
  padding-top: 28px;
}

.doc-toc {
  position: sticky;
  top: 76px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 13px;
}

.doc-toc a {
  color: var(--muted);
  text-decoration: none;
}

@media (hover: hover) and (pointer: fine) {
  .doc-toc a:hover {
    color: var(--text);
  }
}

.doc-page h2 {
  margin-top: 40px;
  padding-top: 8px;
}

.doc-page h2:first-child {
  margin-top: 0;
}

.doc-page p {
  margin: 0 0 12px;
  color: #3a3a3c;
  font-size: 16px;
  line-height: 1.5;
}

.doc-page ul,
.doc-page ol {
  margin: 0 0 16px;
  padding-left: 1.2em;
  color: #3a3a3c;
  font-size: 16px;
}

.doc-page li + li {
  margin-top: 6px;
}

.table-wrap {
  overflow-x: auto;
  margin: 12px 0 20px;
}

.doc-page table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.doc-page th,
.doc-page td {
  text-align: left;
  padding: 10px 12px 10px 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.doc-page th {
  font-size: 12px;
  font-weight: 510;
  color: var(--muted);
}

.code-block {
  position: relative;
  margin: 12px 0 20px;
}

.code-block button {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 0 0 1px var(--line);
}

.callout {
  margin: 16px 0 20px;
  padding: 14px 16px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 8%, white);
  color: var(--text);
  font-size: 15px;
}

@media (max-width: 800px) {
  .doc-layout {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .doc-toc {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px 16px;
    padding-bottom: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  button,
  .risk-fill,
  details.group > summary::before {
    transition: none;
  }
}