/* Arena — arena.oxagen.sh
   Light "evidence" page, one dark scoreboard signature element.
   Mono display (transcripts, diffs, receipts are the brand material). */

:root {
  --paper: #f7f8f7;
  --ink: #14171a;
  --muted: #5c6670;
  --line: #dde1de;
  --panel: #101317;
  --panel-line: #262c33;
  --amber: #ffb020;
  --amber-dim: #b98217;
  --pass: #0b7a3e;
  --fail: #c6362c;
  --link: #0b5aa2;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  --serif: Charter, "Iowan Old Style", Georgia, Cambria, serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0e1114;
    --ink: #e8eaec;
    --muted: #98a2ab;
    --line: #232930;
    --panel: #090b0d;
    --panel-line: #232930;
    --link: #6db3f2;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation: none !important;
    transition: none !important;
  }
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */

.site-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 0 0;
  font-family: var(--mono);
  font-size: 14px;
}

.site-head .brand {
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-head .brand span {
  color: var(--muted);
  font-weight: 400;
}

.site-head nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.site-head nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-head nav a:hover,
.site-head nav a[aria-current="page"] {
  color: var(--ink);
}

/* ---------- hero ---------- */

.hero {
  padding: 88px 0 40px;
}

.hero h1 {
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  max-width: 21ch;
}

.hero .sub {
  margin-top: 24px;
  max-width: 58ch;
  font-size: 19px;
  color: var(--muted);
}

.hero .sub strong {
  color: var(--ink);
  font-weight: 600;
}

.cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 32px;
  font-family: var(--mono);
  font-size: 14px;
}

.btn {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 6px;
  text-decoration: none;
  border: 1px solid var(--ink);
}

.btn.solid {
  background: var(--ink);
  color: var(--paper);
}

.btn.ghost {
  color: var(--ink);
}

.btn:hover {
  transform: translateY(-1px);
}

/* ---------- scoreboard (signature) ---------- */

.scoreboard {
  margin: 48px 0 8px;
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 10px;
  overflow: hidden;
  font-family: var(--mono);
  color: #cfd6dd;
  box-shadow: 0 24px 60px -32px rgb(0 0 0 / 0.5);
}

.scoreboard .bar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--panel-line);
  font-size: 12.5px;
  color: #8a949e;
  flex-wrap: wrap;
}

.scoreboard .bar .cmd {
  color: #cfd6dd;
  overflow-wrap: anywhere;
}

.scoreboard .bar .cmd::before {
  content: "$ ";
  color: var(--amber);
}

.sb-body {
  padding: 20px 18px 8px;
  overflow-x: auto;
}

.sb-row {
  display: grid;
  grid-template-columns: 130px 1fr 150px;
  gap: 14px;
  align-items: center;
  padding: 10px 0;
  min-width: 520px;
}

.sb-row .name {
  font-size: 14px;
  color: #e8eaec;
}

.sb-row .rate {
  font-size: 14px;
  color: var(--amber);
  text-align: right;
  white-space: nowrap;
}

.sb-row .rate small {
  color: #8a949e;
  font-size: 11.5px;
  display: block;
}

.ci {
  position: relative;
  height: 14px;
  background: #1b2129;
  border-radius: 7px;
}

.ci .band {
  position: absolute;
  top: 3px;
  bottom: 3px;
  background: rgb(255 176 32 / 0.28);
  border-radius: 4px;
}

.ci .pt {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--amber);
  border-radius: 2px;
}

.sb-foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 18px 14px;
  border-top: 1px solid var(--panel-line);
  font-size: 12.5px;
  color: #8a949e;
}

.sb-foot .p {
  color: #cfd6dd;
}

.sb-note {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 56px;
}

/* ---------- sections ---------- */

section {
  padding: 56px 0 8px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}

section h2 {
  font-family: var(--mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
  max-width: 30ch;
}

section > .wrap > p,
section .prose p {
  margin-top: 18px;
  max-width: 66ch;
}

section .prose p + p {
  margin-top: 14px;
}

.muted {
  color: var(--muted);
}

/* defense table */

.defense {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.defense .row {
  display: grid;
  grid-template-columns: minmax(180px, 2fr) 3fr;
  gap: 8px 28px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.defense .attack {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
}

.defense .attack::before {
  content: "“";
  color: var(--muted);
}

.defense .attack::after {
  content: "”";
  color: var(--muted);
}

.defense .answer {
  font-size: 15.5px;
  color: var(--muted);
}

.defense .answer strong {
  color: var(--ink);
  font-weight: 600;
}

@media (max-width: 640px) {
  .defense .row {
    grid-template-columns: 1fr;
  }
}

/* metric cards */

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.metric {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.metric .k {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}

.metric .v {
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted);
}

/* code block */

pre.shell {
  margin-top: 24px;
  background: var(--panel);
  color: #cfd6dd;
  border: 1px solid var(--panel-line);
  border-radius: 10px;
  padding: 18px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.7;
  overflow-x: auto;
}

pre.shell .c {
  color: #6f7a84;
}

pre.shell .y {
  color: var(--amber);
}

/* doc cards */

.docs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.doc-card {
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  text-decoration: none;
  color: var(--ink);
}

.doc-card:hover {
  border-color: var(--muted);
}

.doc-card .t {
  font-family: var(--mono);
  font-size: 14.5px;
  font-weight: 700;
}

.doc-card .d {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--muted);
}

.doc-card .m {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

/* ---------- footer ---------- */

.site-foot {
  margin-top: 88px;
  border-top: 1px solid var(--line);
  padding: 28px 0 48px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.site-foot a {
  color: var(--muted);
}

/* ---------- article pages (paper, spec) ---------- */

.article {
  padding: 64px 0 24px;
}

.article .kicker {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.article h1 {
  margin-top: 14px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  max-width: 26ch;
}

.article .byline {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}

.article .abstract {
  margin-top: 28px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 16px;
  color: var(--muted);
  max-width: 72ch;
}

.article .abstract strong {
  color: var(--ink);
}

.article-body {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.72;
  max-width: 72ch;
  padding-bottom: 40px;
}

.article-body h2 {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 52px 0 4px;
  line-height: 1.3;
}

.article-body h3 {
  font-family: var(--mono);
  font-size: 16.5px;
  font-weight: 700;
  margin: 36px 0 0;
}

.article-body p {
  margin-top: 16px;
}

.article-body ul,
.article-body ol {
  margin: 16px 0 0 26px;
}

.article-body li {
  margin-top: 8px;
}

.article-body li::marker {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 14px;
}

.article-body code {
  font-family: var(--mono);
  font-size: 0.82em;
  background: rgb(127 127 127 / 0.12);
  padding: 2px 5px;
  border-radius: 4px;
}

.article-body pre {
  margin-top: 18px;
  background: var(--panel);
  color: #cfd6dd;
  border: 1px solid var(--panel-line);
  border-radius: 10px;
  padding: 18px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
  overflow-x: auto;
}

.article-body pre code {
  background: none;
  padding: 0;
  font-size: 1em;
}

.article-body blockquote {
  margin-top: 18px;
  padding-left: 18px;
  border-left: 3px solid var(--line);
  color: var(--muted);
}

.article-body table {
  margin-top: 20px;
  border-collapse: collapse;
  width: 100%;
  font-family: var(--sans);
  font-size: 14.5px;
}

.article-body .tablewrap {
  overflow-x: auto;
  margin-top: 20px;
}

.article-body .tablewrap table {
  margin-top: 0;
  min-width: 640px;
}

.article-body th {
  text-align: left;
  font-family: var(--mono);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  border-bottom: 1px solid var(--ink);
  padding: 8px 12px 8px 0;
  vertical-align: bottom;
}

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

.article-body .refs {
  font-family: var(--sans);
  font-size: 14.5px;
  color: var(--muted);
}

.article-body .refs li {
  margin-top: 10px;
  overflow-wrap: anywhere;
}

.article-body sup a {
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.72em;
}

.toc {
  margin-top: 28px;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 13.5px;
  max-width: 72ch;
}

.toc .t {
  font-weight: 700;
  margin-bottom: 10px;
}

.toc ol {
  margin-left: 20px;
}

.toc li {
  margin-top: 6px;
}

.toc a {
  text-decoration: none;
}

.toc a:hover {
  text-decoration: underline;
}