/* Runes protocol documentation. Carved stone: engraved minimalism.
   Dark theme: near-black granite. Light theme: pale limestone.
   Single incised accent: oxidized copper green. No gradients, no cards. */

:root {
  --bg: #eae5d9;
  --bg-inset: #e0dbcd;
  --ink: #29261f;
  --muted: #5a5346;
  --accent: #1f6b56;
  --accent-ink: #14503f;
  --rule: #c4bcab;
  --edge: #7f7768;
  --rule-hi: #f5f1e7;
  --mark: #d5cfbf;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, "SF Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131211;
    --bg-inset: #1a1916;
    --ink: #d8d2c6;
    --muted: #a09a8d;
    --accent: #6cbfa6;
    --accent-ink: #8ed3bd;
    --rule: #33302b;
    --edge: #726c61;
    --rule-hi: #060605;
    --mark: #242220;
  }
}

:root[data-theme="dark"] {
  --bg: #131211;
  --bg-inset: #1a1916;
  --ink: #d8d2c6;
  --muted: #a09a8d;
  --accent: #6cbfa6;
  --accent-ink: #8ed3bd;
  --rule: #33302b;
  --edge: #726c61;
  --rule-hi: #060605;
  --mark: #242220;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

/* Engraved rule: a groove cut into the stone */
hr, .rule {
  border: 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule-hi);
  height: 0;
  margin: 2.5rem 0;
}

a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-ink); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--bg);
  color: var(--accent);
  padding: 0.5rem 1rem;
  z-index: 20;
}
.skip:focus { left: 0; }

/* Masthead */
header.site {
  border-bottom: 1px solid var(--rule);
  box-shadow: 0 1px 0 var(--rule-hi);
}
.masthead {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1.1rem 1.25rem 0.9rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem 1.5rem;
}
.brand {
  font-size: 1.35rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}
.brand:hover { color: var(--accent); }
nav.site-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.1rem; }
nav.site-nav a {
  color: var(--muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  padding: 0.15rem 0;
}
nav.site-nav a:hover { color: var(--accent); }
nav.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom: 2px solid var(--accent);
}
.tools { margin-left: auto; display: flex; align-items: center; gap: 0.9rem; }
#theme-toggle {
  background: none;
  border: 1px solid var(--edge);
  color: var(--muted);
  font-family: var(--serif);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3rem 0.65rem;
  cursor: pointer;
}
#theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* Search */
.search { position: relative; }
.search input {
  background: var(--bg);
  border: 1px solid var(--edge);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 0.9rem;
  padding: 0.35rem 0.6rem;
  width: 13rem;
  max-width: 45vw;
}
.search input::placeholder { color: var(--muted); }
#search-results {
  position: absolute;
  right: 0;
  top: calc(100% + 2px);
  z-index: 10;
  background: var(--bg);
  border: 1px solid var(--edge);
  list-style: none;
  margin: 0;
  padding: 0;
  width: 22rem;
  max-width: 88vw;
  max-height: 22rem;
  overflow-y: auto;
}
#search-results li { border-bottom: 1px solid var(--rule); }
#search-results li:last-child { border-bottom: 0; }
#search-results a {
  display: block;
  padding: 0.55rem 0.75rem;
  text-decoration: none;
  color: var(--ink);
}
#search-results a .where {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
#search-results a:hover, #search-results a.active { background: var(--bg-inset); color: var(--accent-ink); }
#search-results .empty { padding: 0.55rem 0.75rem; color: var(--muted); font-size: 0.9rem; }

/* Main column */
main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

h1, h2, h3, h4 {
  font-weight: 600;
  text-transform: uppercase;
  line-height: 1.25;
}
h1 {
  font-size: 1.7rem;
  letter-spacing: 0.22em;
  margin: 0 0 0.5rem;
}
h2 {
  font-size: 1.15rem;
  letter-spacing: 0.18em;
  margin: 3rem 0 0.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  box-shadow: 0 -1px 0 var(--rule-hi);
}
h3 { font-size: 0.95rem; letter-spacing: 0.14em; margin: 2rem 0 0.5rem; }
h4 { font-size: 0.85rem; letter-spacing: 0.12em; margin: 1.5rem 0 0.4rem; color: var(--muted); }

.kicker {
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 0.78rem;
  color: var(--accent);
  margin: 0 0 1rem;
}
.lede { font-size: 1.2rem; color: var(--ink); max-width: 44rem; }
.muted { color: var(--muted); }

p, ul, ol, dl { max-width: 46rem; }
li { margin: 0.25rem 0; }

dt { font-weight: 600; margin-top: 0.9rem; }
dd { margin: 0.15rem 0 0 1.25rem; color: var(--ink); }

/* Code, engraved insets */
code, kbd {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--bg-inset);
  padding: 0.08em 0.35em;
  border: 1px solid var(--rule);
}
pre {
  background: var(--bg-inset);
  border: 1px solid var(--rule);
  box-shadow: inset 0 1px 0 var(--rule-hi);
  padding: 0.9rem 1rem;
  overflow-x: auto;
  line-height: 1.5;
  max-width: 100%;
}
pre code { background: none; border: 0; padding: 0; font-size: 0.85rem; }

/* Tables scroll inside their own container */
.table-scroll { overflow-x: auto; margin: 1rem 0; max-width: 100%; }
table {
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 30rem;
}
caption {
  text-align: left;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--muted);
  padding-bottom: 0.5rem;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.45rem 1rem 0.45rem 0;
  border-bottom: 1px solid var(--rule);
}
th {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.76rem;
  color: var(--muted);
  font-weight: 600;
}
td code { white-space: nowrap; }

/* Numbered normative rules, incised */
ol.rules { counter-reset: rule; list-style: none; padding-left: 0; max-width: 48rem; }
ol.rules > li {
  counter-increment: rule;
  border-top: 1px solid var(--rule);
  box-shadow: 0 -1px 0 var(--rule-hi);
  padding: 0.8rem 0 0.8rem 3.4rem;
  position: relative;
  margin: 0;
}
ol.rules > li::before {
  content: "R" counter(rule);
  position: absolute;
  left: 0;
  top: 0.85rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--accent);
}
ol.rules ol { list-style: lower-alpha; }

/* Definition of terms in reference */
dl.terms dt { text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.85rem; }

/* Figures / glyph strips */
figure { margin: 2rem 0; max-width: 100%; }
figure svg { width: 100%; height: auto; display: block; }
figcaption {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.5rem;
  letter-spacing: 0.04em;
}
.glyph-strip { border: 1px solid var(--rule); box-shadow: inset 0 1px 0 var(--rule-hi); background: var(--bg-inset); }

/* Decoder */
.decoder-form label { display: block; text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.78rem; color: var(--muted); margin: 1rem 0 0.3rem; }
.decoder-form textarea, .decoder-form input[type="text"] {
  width: 100%;
  background: var(--bg-inset);
  border: 1px solid var(--edge);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.6rem;
}
.decoder-form textarea { min-height: 6rem; resize: vertical; }
.decoder-form button, .btn {
  background: none;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--serif);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.82rem;
  padding: 0.55rem 1.4rem;
  margin-top: 1rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
.decoder-form button:hover, .btn:hover { color: var(--accent-ink); border-color: var(--accent-ink); }
.decoder-examples button {
  background: none;
  border: 1px solid var(--edge);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.3rem 0.6rem;
  margin: 0.25rem 0.4rem 0 0;
  cursor: pointer;
}
.decoder-examples button:hover { color: var(--accent); border-color: var(--accent); }
#decode-output { margin-top: 2rem; }
.verdict {
  border: 1px solid var(--rule);
  border-left: 4px solid var(--accent);
  padding: 0.8rem 1rem;
  margin: 1rem 0;
  background: var(--bg-inset);
}
.verdict.cenotaph { border-left-color: #b3563a; }
.verdict h2, .verdict h3 {
  margin: 0 0 0.3rem;
  padding-top: 0;
  border-top: 0;
  box-shadow: none;
  font-size: 0.95rem;
  letter-spacing: 0.14em;
}
.flaw-name { font-family: var(--mono); font-size: 0.85rem; }

/* Status line under the title */
.status-line {
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  border-top: 1px solid var(--rule);
  box-shadow: 0 -1px 0 var(--rule-hi);
  padding-top: 0.75rem;
  margin: 1.5rem 0 0;
  max-width: 46rem;
}

/* Footer colophon */
footer.site {
  border-top: 1px solid var(--rule);
  box-shadow: 0 1px 0 var(--rule-hi) inset;
}
.colophon {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  color: var(--muted);
  font-size: 0.83rem;
  line-height: 1.8;
}
.colophon a { color: var(--muted); }
.colophon a:hover { color: var(--accent); }

/* Small screens */
@media (max-width: 40rem) {
  body { font-size: 1rem; }
  h1 { font-size: 1.3rem; letter-spacing: 0.16em; }
  .masthead { padding: 0.9rem 1rem; }
  .tools { margin-left: 0; width: 100%; }
  .search input { width: 100%; max-width: none; }
  .search { flex: 1; }
  #search-results { left: 0; right: auto; width: 100%; }
  main { padding: 1.75rem 1rem 3rem; }
  ol.rules > li { padding-left: 2.6rem; }
}

@media print {
  header.site .tools, .skip { display: none; }
}