/* Theme: Operator Console v2 — "captured from the equipment" dark theme
   Innovations beyond a vanilla dark mode:
   - Each LOFAR-gram is presented as a faux instrument trace, with a TRACE header
     bar carrying a session id and a live status LED, plus a CRT scanline overlay.
   - Time / frequency metadata is rendered as an LCD-style readout strip with
     bracketed values.
   - A faint engineering grid sits behind the content column.
   - The edition strip becomes a classification banner with corner tick marks.
*/

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&family=Share+Tech+Mono&display=swap");

:root {
  --bg: #07101a;
  --bg-grid: #0c1a26;
  --panel: #11202e;
  --panel-2: #17293a;
  --rule: #25415c;
  --rule-soft: #1b2f44;
  --ink: #d6e4f0;
  --ink-dim: #7a98b4;
  --ink-faint: #4f6a85;
  --cyan: #4dd0e1;
  --cyan-bright: #80deea;
  --amber: #ffb74d;
  --amber-bright: #ffd180;
  --green-led: #6cff9d;
  --instructor: #ff8a3d;
  --student: #4dd0e1;
}

html { background: var(--bg); }
body {
  margin: 0;
  color: var(--ink);
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  background:
    radial-gradient(ellipse at top, #0d1c2a 0%, var(--bg) 60%),
    linear-gradient(var(--bg-grid) 1px, transparent 1px) 0 0 / 100% 32px,
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px) 0 0 / 32px 100%,
    var(--bg);
  background-attachment: fixed;
}

/* ---------- Classification banner ---------- */
body::before {
  content: "┄ INSTRUCTOR ┄ TRAINING USE ONLY ┄ CLASS-RESTRICTED ┄";
  display: block;
  background: linear-gradient(90deg, transparent, rgba(255,138,61,0.15) 10%, rgba(255,138,61,0.15) 90%, transparent);
  border-bottom: 1px solid rgba(255,138,61,0.35);
  color: var(--instructor);
  font: 600 11px/1 "JetBrains Mono", ui-monospace, monospace;
  letter-spacing: 0.38em;
  text-align: center;
  padding: 10px 12px;
  text-transform: uppercase;
}
body[data-edition="student"]::before {
  content: "┄ STUDENT ┄ TRAINING ┄";
  background: linear-gradient(90deg, transparent, rgba(77,208,225,0.12) 10%, rgba(77,208,225,0.12) 90%, transparent);
  border-bottom-color: rgba(77,208,225,0.35);
  color: var(--student);
}

/* ---------- Layout ---------- */
main[role="main"] {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 28px 80px;
  position: relative;
}

/* ---------- Topic title ---------- */
article > h1.topictitle1 {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-weight: 600;
  font-size: 28px;
  color: var(--cyan);
  margin: 0 0 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
  position: relative;
}
article > h1.topictitle1::before {
  content: "» ";
  color: var(--amber);
}

article > h1 .ph.vessel-name {
  display: inline-block;
  margin-top: 12px;
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
  font-size: 12px;
  color: var(--amber);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  background: rgba(255,183,77,0.08);
  border: 1px solid rgba(255,183,77,0.4);
  border-radius: 2px;
  padding: 4px 10px;
}
article > h1 .ph.vessel-name::before { content: "◉ TGT  "; color: var(--amber-bright); letter-spacing: 0.1em; }

/* ---------- Section labels ---------- */
section.section > h2.sectiontitle {
  font: 600 11px/1 "JetBrains Mono", monospace;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 32px 0 12px;
}

/* ---------- Cleanup of DITA-OT scaffolding ---------- */
caption:empty { display: none; }
section.section > br,
td.entry > br { display: none; }

/* ---------- Analysis sheet ---------- */
section.analysis-sheet { margin-top: 8px; }
section.analysis-sheet > h2.sectiontitle::before {
  content: "▤ ";
  color: var(--cyan);
}
section.analysis-sheet .imagecenter {
  text-align: center;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 4px;
}
section.analysis-sheet .imagecenter img {
  max-width: 100%;
  height: auto;
  filter: brightness(1.05) saturate(1.1);
}

/* ---------- LOFAR stage: faux instrument trace ---------- */
section.lofar-stage {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0;
  margin-top: 22px;
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(77,208,225,0.04), 0 12px 32px rgba(0,0,0,0.4);
}

/* Stage header bar */
section.lofar-stage > h2.sectiontitle {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  padding: 10px 14px;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border-bottom: 1px solid var(--rule);
  color: var(--cyan);
  letter-spacing: 0.24em;
}
section.lofar-stage > h2.sectiontitle::before {
  content: "● TRACE / STAGE";
  color: var(--amber);
  letter-spacing: 0.18em;
}

/* Image cell — scanlines overlay */
section.lofar-stage table.gram-config tr:first-child td {
  padding: 0;
  position: relative;
}
section.lofar-stage .imagecenter {
  position: relative;
  text-align: center;
  padding: 0;
  margin: 0;
  background: #000;
}
section.lofar-stage .imagecenter::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    180deg,
    rgba(0,0,0,0) 0px,
    rgba(0,0,0,0) 2px,
    rgba(77,208,225,0.06) 2px,
    rgba(77,208,225,0.06) 3px
  );
  mix-blend-mode: screen;
}
section.lofar-stage .imagecenter img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
  filter: contrast(1.05) brightness(1.05) saturate(1.1);
}

/* Metadata readout: LCD strip below the gram */
section.lofar-stage table.gram-config {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  background: transparent;
}
section.lofar-stage table.gram-config,
section.lofar-stage table.gram-config tbody,
section.lofar-stage table.gram-config tr,
section.lofar-stage table.gram-config td { border: 0; background: transparent; }
section.lofar-stage table.gram-config tbody {
  display: block;
}
section.lofar-stage table.gram-config tr:not(:first-child) {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  margin: 10px 18px 10px 0;
  padding-left: 14px;
}
section.lofar-stage table.gram-config tr:nth-child(2) { margin-left: 14px; }
section.lofar-stage table.gram-config tr:not(:first-child) td {
  padding: 0;
  font-family: "Share Tech Mono", "JetBrains Mono", monospace;
  font-size: 13px;
  color: var(--cyan-bright);
}
section.lofar-stage table.gram-config tr:not(:first-child) td:first-child {
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 10px;
}
section.lofar-stage table.gram-config tr:not(:first-child) td:first-child::after {
  content: " ⟨";
  color: var(--ink-faint);
}
section.lofar-stage table.gram-config tr:not(:first-child) td:last-child::after {
  content: "⟩";
  color: var(--ink-faint);
}

/* Footer-style band under the readout */
section.lofar-stage > table.gram-config {
  border-top: 1px solid var(--rule-soft);
  background:
    linear-gradient(180deg, rgba(0,0,0,0.25), transparent);
}

/* ---------- Inline body links ----------
   <xref> rendered as <a class="xref"> and other in-body anchors. The
   browser-default blue is unreadable on the dark panel; pick up the
   theme's cyan accent and an amber hover, matching the related-links /
   tile treatments elsewhere on the page. */
article a,
article a:link,
article a:visited {
  color: var(--cyan-bright);
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-underline-offset: 2px;
}
article a:hover,
article a:focus { color: var(--amber-bright); }

/* ---------- Inline tags ---------- */
.vessel-name { color: var(--amber); }
.instructor-only {
  background: rgba(255,138,61,0.1);
  border-left: 3px solid var(--instructor);
  padding: 4px 10px;
  border-radius: 2px;
}
body[data-edition="student"] .instructor-only { display: none; }

/* ---------- Related links → back pill ---------- */
nav.related-links {
  margin-top: 48px;
  padding-top: 18px;
  border-top: 1px dashed var(--rule);
}
nav.related-links strong { display: none; }
nav.related-links ul.linklist { list-style: none; padding: 0; margin: 0; }
nav.related-links a.link {
  display: inline-block;
  text-decoration: none;
  color: var(--cyan);
  background: rgba(77,208,225,0.06);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 7px 16px;
  font: 600 11px/1 "JetBrains Mono", monospace;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
nav.related-links a.link::before { content: "◂◂ "; color: var(--amber); }
nav.related-links a.link:hover {
  background: rgba(77,208,225,0.14);
  border-color: var(--cyan);
}

/* ---------- Landing / index pages (publish_html.py output) ---------- */
body.landing,
body.edition-index { background-image: none; background: radial-gradient(ellipse at top, #0d1c2a 0%, var(--bg) 60%) fixed; }
body.landing main,
body.edition-index main { padding-top: 40px; }
body.landing h1,
body.edition-index h1 {
  font-family: "JetBrains Mono", monospace;
  font-size: 32px;
  color: var(--cyan);
  margin-bottom: 4px;
}
body.landing h1::before,
body.edition-index h1::before { content: "» "; color: var(--amber); }
body.landing .generated,
body.edition-index .generated {
  font: 11px/1 "JetBrains Mono", monospace;
  color: var(--ink-faint);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
body.landing ul.deliverables,
body.edition-index ul.deliverables {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
body.landing ul.deliverables li,
body.edition-index ul.deliverables li {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 18px 18px 16px;
  position: relative;
  transition: border-color 0.15s, transform 0.15s;
}
body.landing ul.deliverables li:hover,
body.edition-index ul.deliverables li:hover {
  border-color: var(--cyan);
  transform: translateY(-1px);
}
body.landing ul.deliverables li::before,
body.edition-index ul.deliverables li::before {
  content: "▪ MODULE";
  display: block;
  font: 600 10px/1 "JetBrains Mono", monospace;
  color: var(--amber);
  letter-spacing: 0.28em;
  margin-bottom: 8px;
}
body.landing ul.deliverables li.test::before,
body.edition-index ul.deliverables li.test::before { content: "▪ PROGRESS TEST"; color: var(--cyan); }
body.landing ul.deliverables li.assessment::before,
body.edition-index ul.deliverables li.assessment::before { content: "▪ FINAL ASSESSMENT"; color: var(--green-led); }
body.landing ul.deliverables a,
body.edition-index ul.deliverables a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
}
body.landing ul.deliverables a::after,
body.edition-index ul.deliverables a::after {
  content: " →";
  color: var(--cyan);
}
body.landing ul.deliverables .meta,
body.edition-index ul.deliverables .meta {
  display: block;
  margin-top: 6px;
  color: var(--ink-dim);
  font: 12px/1.4 "Inter", sans-serif;
}

/* =====================================================================
   DITA-OT index pages (ditamap → HTML)
   Structure DITA-OT emits:
     body
       h1.topictitle1
       nav
         ul.map
           li.topicref.topichead            <- section heading text
             ul
               li.topicref > a              <- gram link

   Strategy for a long index:
   - Render each .topichead as a card with a colour-coded tab and a count.
   - Inside, lay the grams out as a dense grid of identifier tiles.
   - On the instructor edition, the link text is "Gram NN - vessel info"; we
     split it on the en-dash via a CSS-only trick (the part before " - " is
     boosted, the part after is dimmed and clamped to one line).
===================================================================== */

body.ditamap-index {
  background:
    radial-gradient(ellipse at top, #0d1c2a 0%, var(--bg) 60%),
    linear-gradient(var(--bg-grid) 1px, transparent 1px) 0 0 / 100% 32px,
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px) 0 0 / 32px 100%,
    var(--bg);
  background-attachment: fixed;
}

body.ditamap-index main[role="main"] {
  max-width: 1280px;
  padding: 32px 32px 80px;
}

/* Topic title at the very top of the index */
body.ditamap-index h1.topictitle1 {
  font-family: "JetBrains Mono", monospace;
  font-size: 30px;
  color: var(--cyan);
  margin: 0 0 6px;
  padding-bottom: 0;
  border-bottom: 0;
}
body.ditamap-index h1.topictitle1::before { content: "» "; color: var(--amber); }
body.ditamap-index h1.topictitle1::after { content: none; }
body.ditamap-index h1.topictitle1 .ph {
  display: inline;
  margin: 0 0 0 8px;
  background: none;
  border: 0;
  padding: 0;
  font: 500 13px/1 "JetBrains Mono", monospace;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
body.ditamap-index h1.topictitle1 .ph::before { content: "· "; }

/* nav + outer list */
body.ditamap-index nav { margin-top: 28px; }
body.ditamap-index ul.map,
body.ditamap-index ul.map ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
body.ditamap-index ul.map { display: flex; flex-direction: column; gap: 22px; }

/* Section card (li.topichead) */
body.ditamap-index li.topichead {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--cyan);
  border-radius: 4px;
  padding: 16px 18px 18px;
  position: relative;
  font: 600 12px/1.4 "JetBrains Mono", monospace;
  color: var(--cyan);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
/* Colour-code the five sections by position. Pub10 = amber, Week 1..4 = cyan tints */
body.ditamap-index li.topichead:nth-child(1) { border-left-color: var(--amber); color: var(--amber); }
body.ditamap-index li.topichead:nth-child(2) { border-left-color: #4dd0e1; color: #4dd0e1; }
body.ditamap-index li.topichead:nth-child(3) { border-left-color: #66bb6a; color: #66bb6a; }
body.ditamap-index li.topichead:nth-child(4) { border-left-color: #ba68c8; color: #ba68c8; }
body.ditamap-index li.topichead:nth-child(5) { border-left-color: #ef5350; color: #ef5350; }

/* The text node "Instructor Week 1 Grams" is a bare text inside li.topichead.
   Give it the look of a section title. */
body.ditamap-index li.topichead {
  /* trick: turn the li into a flex column so the inner ul drops to a row below */
}

/* Inner gram list — dense tile grid */
body.ditamap-index li.topichead > ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 6px;
  margin-top: 14px;
}

body.ditamap-index li.topicref:not(.topichead) {
  margin: 0;
  font: 500 12px/1.3 "Inter", sans-serif;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink);
}
body.ditamap-index li.topicref:not(.topichead) a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  text-decoration: none;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--rule-soft);
  border-radius: 3px;
  min-height: 38px;
  transition: border-color 0.12s, background 0.12s, transform 0.12s;
}
body.ditamap-index li.topicref:not(.topichead) a:hover {
  border-color: var(--cyan);
  background: var(--panel-2);
}

/* Split "Gram 20 - FR Stargazer, Category 4, Gandalf" via the ::first-line
   trick won't work for inline split — but DITA-OT emits the whole label as
   a single text node, so we use a CSS truncation + a left-aligned mono prefix.
   For the instructor edition we want the prefix ("Gram NN") to look like a
   stable identifier.  We can't split via CSS alone reliably, so we just
   render the whole label in a single line and clamp it; the "Gram NN" stays
   left-aligned and visible. */
body.ditamap-index li.topicref:not(.topichead) a {
  font-feature-settings: "tnum";
}
body.ditamap-index li.topicref:not(.topichead) a::before {
  content: "▸";
  color: var(--amber);
  font: 12px/1 "JetBrains Mono", monospace;
}
body.ditamap-index li.topicref:not(.topichead) a {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Student edition: labels are short ("Gram 20") so center them and turn the
   tiles into a tight number-card grid */
body[data-edition="student"].ditamap-index li.topichead > ul {
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
}
body[data-edition="student"].ditamap-index li.topicref:not(.topichead) a {
  justify-content: center;
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.06em;
}
body[data-edition="student"].ditamap-index li.topicref:not(.topichead) a::before { content: none; }

/* --- Instructor: 2-line tile when the descriptor is split out into spans ---
   In the mockup this is done via a screenshot-time JS that splits the link
   text at " - " into <span.gram-id>…</span><span.gram-desc>…</span>.
   In production we'd surface those as separate elements by adjusting the
   DITA topicmeta / navtitle structure or via a custom plugin so DITA-OT
   emits them directly. */
body[data-edition="instructor"].ditamap-index li.topichead > ul {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 8px;
}
body[data-edition="instructor"].ditamap-index li.topicref:not(.topichead) a {
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  white-space: normal;
  min-height: 56px;
  padding: 9px 12px;
}
body[data-edition="instructor"].ditamap-index li.topicref:not(.topichead) a::before { content: none; }
body[data-edition="instructor"].ditamap-index .gram-id {
  font: 600 13px/1.1 "JetBrains Mono", monospace;
  color: var(--cyan-bright);
  letter-spacing: 0.06em;
}
body[data-edition="instructor"].ditamap-index .gram-desc {
  font: 11px/1.3 "Inter", sans-serif;
  color: var(--ink-dim);
  letter-spacing: 0.02em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}