/* ———————————————————————————————————————— */
/* Kapteeni — operating manual               */
/* same system as the TriusAI frontpage:     */
/* K + W + warm gray + turquoise, serif,     */
/* italics, straight rules, no round corners */
/* ———————————————————————————————————————— */

:root {
  --paper: #f6f4ef;
  --paper-2: #edeae2;
  --ink: #101010;
  --gray: #6f6a62;
  --accent: #0e7c7b;
  --rule: #101010;
  --rule-light: #c9c4b8;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

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

html { background: var(--paper); }

body {
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua",
    Georgia, "Times New Roman", serif;
  color: var(--ink);
  font-size: 1.0625rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: var(--paper); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

em { font-style: italic; }

/* —— page frame ——————————————————— */

.page {
  max-width: 58rem;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  border-left: 1px solid var(--rule-light);
  border-right: 1px solid var(--rule-light);
  min-height: 100vh;
}

/* —— masthead ————————————————————— */

.masthead { border-bottom: 1px solid var(--rule); padding: 1.1rem 0 0; }

.masthead-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: baseline;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.mh-left   { text-align: left; }
.mh-center { text-align: center; color: var(--gray); letter-spacing: 0.22em; }
.mh-right  { text-align: right; }

.site-nav {
  display: flex;
  gap: 1.75rem;
  padding: 0.65rem 0 0.75rem;
  margin-top: 0.75rem;
  border-top: 1px solid var(--rule-light);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-nav a { color: var(--ink); }
.site-nav a:hover { color: var(--accent); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--accent); }
.site-nav .nav-right { margin-left: auto; }

/* —— feature head —————————————————— */

.feature { padding: 3.6rem 0 3.2rem; }

.kicker {
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.4rem;
}

h1 {
  font-size: clamp(2.9rem, 5.5vw, 4.2rem);
  font-weight: 500;
  font-style: italic;
  letter-spacing: -0.015em;
  line-height: 1.05;
  margin-bottom: 1.3rem;
}

.lede {
  font-size: 1.2rem;
  line-height: 1.55;
  max-width: 58ch;
  margin-bottom: 1.2rem;
}

.body-copy { max-width: 62ch; }

.ramp { display: block; width: 100%; height: auto; }

/* —— sections —————————————————————— */

.doc-section { padding: 2.4rem 0 1rem; }

.doc-section h2 {
  font-size: 1.4rem;
  font-weight: 500;
  font-style: italic;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.55rem;
  margin-bottom: 1.5rem;
}

.sec-no {
  font-style: normal;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.14em;
  margin-right: 0.9rem;
  text-transform: uppercase;
  vertical-align: 0.22em;
}

h3 {
  font-size: 1.13rem;
  font-weight: 500;
  font-style: italic;
  margin: 2rem 0 0.8rem;
}

.doc-section p { max-width: 62ch; }
.doc-section p + p { margin-top: 0.8rem; }

/* inline code */
p code, li code, td code, dd code, figcaption code {
  font-family: var(--mono);
  font-size: 0.84em;
  background: var(--paper-2);
  border: 1px solid var(--rule-light);
  padding: 0.06em 0.32em;
}

/* —— tables (booktabs) ————————————— */

.table-scroll { overflow-x: auto; margin: 1.2rem 0; }

table.data { width: 100%; border-collapse: collapse; font-size: 0.95rem; }

table.data caption {
  caption-side: bottom;
  text-align: left;
  font-style: italic;
  font-size: 0.82rem;
  color: var(--gray);
  padding-top: 0.55rem;
}

table.data th {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray);
  text-align: left;
  border-bottom: 1px solid var(--rule);
  padding: 0.45rem 0.75rem 0.4rem;
  white-space: nowrap;
}

table.data td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--rule-light);
  vertical-align: top;
}

table.data td.num, table.data th.num { text-align: right; }
table.data td.num {
  font-family: var(--mono);
  font-size: 0.84rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

table.data .dim { color: var(--gray); }

/* fixed two-column layout (e.g. request/answer tables) */
table.data.fixed-cols { table-layout: fixed; }
table.data.fixed-cols th:first-child,
table.data.fixed-cols td:first-child { width: 62%; }

/* —— code ——————————————————————————— */

pre {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.6;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 1rem 1.2rem;
  overflow-x: auto;
  margin: 1.2rem 0;
  max-width: 100%;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 1em;
}

figure.figure { margin: 1.4rem 0; }
figure.figure pre { margin: 0; }
figure.figure figcaption {
  font-size: 0.82rem;
  font-style: italic;
  color: var(--gray);
  margin-top: 0.55rem;
}

/* —— callout ———————————————————————— */

.callout {
  border: 1px solid var(--rule);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  margin: 1.6rem 0;
  font-size: 0.95rem;
  max-width: 70ch;
}

.callout .co-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

/* —— spec lists (fields) ———————————— */

.spec { border-top: 1px solid var(--rule); margin: 1.2rem 0; }

.spec-row {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 1.2rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--rule-light);
}

.spec-term {
  font-family: var(--mono);
  font-size: 0.85rem;
  padding-top: 0.15rem;
}

.spec-term .req {
  color: var(--accent);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-left: 0.5em;
}

.spec-desc { font-size: 0.95rem; }
.spec-desc ul { margin: 0.3rem 0 0 1.2rem; font-size: 0.93rem; }
.spec-desc ul li + li { margin-top: 0.2rem; }

/* —— primitives ————————————————————— */

.primitive { margin: 2.2rem 0; }

.primitive-head {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  border-bottom: 1px solid var(--rule-light);
  padding-bottom: 0.4rem;
  margin-bottom: 1rem;
}

.primitive-name { font-size: 1.25rem; font-style: italic; font-weight: 500; }

.primitive-shape {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--gray);
  margin-left: auto;
  text-align: right;
}

/* —— catalogue / history entries ———— */

.entries { list-style: none; border-top: 1px solid var(--rule); margin: 1.2rem 0; }

.entry {
  display: grid;
  grid-template-columns: 3.2rem 1fr auto;
  gap: 1.4rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--rule-light);
  align-items: baseline;
}

.entry-no {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--gray);
  letter-spacing: 0.1em;
}

.entry-name { font-size: 1.12rem; font-style: italic; font-weight: 500; }
.entry-name a { color: var(--ink); }
.entry-name a:hover { color: var(--accent); text-decoration: none; }

.entry-desc { font-size: 0.93rem; color: var(--gray); margin-top: 0.25rem; max-width: 56ch; }

.entry-meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray);
  white-space: nowrap;
  text-align: right;
}

/* —— module list ———————————————————— */

.modules { list-style: none; border-top: 1px solid var(--rule); margin: 1.2rem 0; }

.modules li {
  display: grid;
  grid-template-columns: 17rem 1fr;
  gap: 1.2rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--rule-light);
}

.modules .mod { font-family: var(--mono); font-size: 0.84rem; padding-top: 0.1rem; }
.modules .mod-desc { font-size: 0.93rem; color: var(--ink); }
.modules .mod-desc .dim { color: var(--gray); }

/* —— notes —————————————————————————— */

.note { font-size: 0.9rem; font-style: italic; color: var(--gray); max-width: 62ch; }

/* —— ordered / plain lists —————————— */

.doc-section ol, .doc-section ul { margin: 0.8rem 0 0.8rem 1.4rem; max-width: 62ch; }
.doc-section ol li + li, .doc-section ul li + li { margin-top: 0.55rem; }

/* —— colophon ——————————————————————— */

.colophon { border-top: 1px solid var(--rule); margin-top: 3rem; padding-top: 1.8rem; text-align: center; }

.fleuron { color: var(--accent); font-size: 1.1rem; }

.colophon-text {
  font-size: 0.88rem;
  font-style: italic;
  color: var(--gray);
  max-width: 58ch;
  margin: 0.8rem auto 1.2rem;
}

.colophon-contact { font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; }
.colophon-contact a { color: var(--ink); }
.colophon-contact a:hover { color: var(--accent); text-decoration: none; }

/* —— small screens —————————————————— */

@media (max-width: 52rem) {
  .masthead-row { grid-template-columns: 1fr; text-align: left !important; gap: 0.2rem; }
  .masthead-row .mh-center { display: none; }
  .site-nav { gap: 1.1rem; flex-wrap: wrap; }
  .feature { padding: 2.4rem 0 2.4rem; }
  .spec-row { grid-template-columns: 1fr; gap: 0.3rem; }
  .entry { grid-template-columns: 2.6rem 1fr; }
  .entry-meta { grid-column: 2; text-align: left; white-space: normal; }
  .modules li { grid-template-columns: 1fr; gap: 0.25rem; }
  .primitive-shape { display: none; }
}