/* Signal Ledger — a printed systems record */
:root {
  --paper: #eee8dc;
  --ink: #171714;
  --muted: #68635a;
  --accent: #b43a26;
  --rule: rgba(23, 23, 20, 0.42);
  --hairline: rgba(23, 23, 20, 0.18);
  --serif: "Arial Narrow", "Liberation Serif Narrow", "Times New Roman", serif;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(90deg, transparent calc(100% - 1px), var(--hairline) 1px),
    linear-gradient(var(--hairline) 1px, transparent 1px);
  background-size: min(8.333vw, 110px) 100%, 100% 36px;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.45;
}

::selection { color: var(--paper); background: var(--accent); }
a { color: inherit; text-underline-offset: 0.22em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 8px 12px;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.masthead, main, footer { max-width: 1440px; margin-inline: auto; }
.masthead { position: relative; padding: 22px 3.5vw 0; border-top: 7px solid var(--ink); }
.masthead-kicker, .section-label, .folio, .annotation, .entry-date, .tech-index,
.primary-nav, .filter-panel, .skill-coordinate, .coordinates {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.masthead-kicker {
  display: flex;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink);
  font-size: 0.63rem;
}
.identity {
  display: grid;
  grid-template-columns: 1fr 4fr 2fr;
  gap: 2vw;
  align-items: end;
  min-height: 250px;
  padding: 30px 0 24px;
}
.folio { align-self: start; margin: 3px 0 0; color: var(--accent); font-size: 0.68rem; }
h1, h2 { margin: 0; font-family: var(--serif); font-weight: 400; letter-spacing: -0.055em; line-height: 0.88; }
h1 { font-size: clamp(4.4rem, 10vw, 10rem); }
.role { max-width: 28ch; margin: 0 0 6px; font-size: 0.88rem; font-weight: 600; line-height: 1.3; }
.primary-nav { display: flex; gap: 24px; padding: 10px 0; border-block: 1px solid var(--ink); font-size: 0.64rem; }
.primary-nav a { text-decoration: none; }
.registration { position: absolute; top: 54px; right: 3.5vw; width: 22px; height: 22px; }
.registration span { position: absolute; background: var(--accent); }
.registration span:first-child { left: 10px; width: 1px; height: 100%; }
.registration span:last-child { top: 10px; width: 100%; height: 1px; }

.ruled-section { margin-inline: 3.5vw; border-bottom: 1px solid var(--ink); }
.section-label { color: var(--muted); font-size: 0.62rem; }
.section-label p { margin: 0 0 7px; color: var(--ink); font-weight: 700; }
.intro {
  display: grid;
  grid-template-columns: 1fr 4fr 2fr;
  gap: 2vw;
  padding-block: 70px 76px;
}
.intro h2, .capabilities h2, .credentials h2, .references h2 { font-size: clamp(3rem, 6.5vw, 7rem); }
.summary { max-width: 720px; margin-top: 38px; font-family: var(--serif); font-size: clamp(1.2rem, 2vw, 1.85rem); line-height: 1.22; }
.summary p { margin: 0 0 0.7em; }
.summary p:first-child::first-letter { float: left; margin: 0.05em 0.08em 0 0; color: var(--accent); font-size: 3.25em; line-height: 0.75; }
.contact-note { align-self: end; padding: 15px 0 0 18px; border-top: 1px solid var(--ink); border-left: 1px solid var(--hairline); font-size: 0.73rem; overflow-wrap: anywhere; }
.contact-note p { margin: 6px 0 0; }
.annotation { margin: 0 0 12px; color: var(--accent); font-size: 0.61rem; }

.ledger { padding-block: 72px; }
.ledger-header { display: grid; grid-template-columns: 1fr 6fr; gap: 2vw; }
.ledger-header h2 { max-width: 900px; font-size: clamp(3.4rem, 8vw, 8.5rem); }
.ledger-deck { max-width: 42ch; margin: 30px 0 0; font-size: 0.85rem; }
.filter-panel { display: none; margin: 60px 0 18px calc(14.285% + 2vw); padding: 16px 0; border-block: 1px solid var(--ink); }
.js .filter-panel { display: block; }
.filter-list { display: flex; flex-wrap: wrap; gap: 6px; }
.filter-list button {
  padding: 6px 9px;
  border: 1px solid var(--rule);
  border-radius: 0;
  color: var(--ink);
  background: transparent;
  font: inherit;
  font-size: 0.6rem;
  text-transform: uppercase;
  cursor: pointer;
}
.filter-list button:hover, .filter-list button.is-active { color: var(--paper); background: var(--accent); border-color: var(--accent); }
.filter-status { min-height: 1em; margin: 10px 0 0; color: var(--muted); font-size: 0.58rem; }
.entries { margin-top: 58px; border-top: 2px solid var(--ink); }
.entry {
  display: grid;
  grid-template-columns: 0.6fr 2.6fr 2fr 1.4fr;
  gap: 2vw;
  position: relative;
  padding: 26px 0 22px;
  border-bottom: 1px solid var(--ink);
}
.entry[hidden] { display: none; }
.entry::before { content: ""; position: absolute; top: 0; bottom: 0; left: calc(8.33% + 1vw); width: 1px; background: var(--hairline); }
.entry-number { font: 2.7rem/1 var(--serif); color: var(--accent); }
.entry-heading h3 { margin: 0; font-family: var(--serif); font-size: clamp(1.55rem, 2.5vw, 2.6rem); font-weight: 400; line-height: 1; }
.entry-date { margin: 0 0 8px; color: var(--muted); font-size: 0.6rem; }
.company { margin: 9px 0 0; font-size: 0.77rem; font-weight: 700; }
.tech-index { display: flex; flex-wrap: wrap; align-content: start; gap: 5px 12px; margin: 0; padding: 2px 0 0; list-style: none; font-size: 0.56rem; line-height: 1.4; }
.tech-index li::before { content: "· "; color: var(--accent); }
.entry-detail summary { display: flex; justify-content: space-between; gap: 12px; padding-bottom: 9px; border-bottom: 1px solid var(--rule); font: 0.65rem var(--mono); text-transform: uppercase; cursor: pointer; list-style: none; }
.entry-detail summary::-webkit-details-marker { display: none; }
.detail-mark { color: var(--accent); font-size: 1rem; transition: transform 180ms ease; }
.entry-detail[open] { grid-column: 2 / -1; }
.entry-detail[open] .detail-mark { transform: rotate(45deg); }
.detail-body { display: grid; grid-template-columns: 1fr 3fr; gap: 2vw; padding: 28px 0 12px; }
.detail-body ul { margin: 0; padding: 0; list-style: none; }
.detail-body li { position: relative; margin-bottom: 12px; padding-left: 20px; max-width: 75ch; font-family: var(--serif); font-size: 1.08rem; line-height: 1.35; }
.detail-body li::before { content: "↳"; position: absolute; left: 0; color: var(--accent); font-family: var(--mono); }

.capabilities, .credentials, .references { display: grid; grid-template-columns: 1fr 6fr; gap: 2vw; padding-block: 72px; }
.capability-field { position: relative; }
.capability-field::after { content: ""; position: absolute; top: 10px; right: 0; width: 46px; height: 46px; border: 1px solid var(--accent); border-radius: 50%; background: linear-gradient(90deg, transparent 49%, var(--accent) 50%, transparent 51%), linear-gradient(transparent 49%, var(--accent) 50%, transparent 51%); opacity: 0.6; }
.skill-plot { display: grid; grid-template-columns: repeat(3, 1fr); margin: 52px 0 0; padding: 0; border-top: 1px solid var(--ink); list-style: none; }
.skill-plot li { display: flex; gap: 18px; min-height: 84px; padding: 18px 12px; border-right: 1px solid var(--hairline); border-bottom: 1px solid var(--ink); font-family: var(--serif); font-size: 1.4rem; }
.skill-coordinate { color: var(--accent); font-size: 0.58rem; }
.credential-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 4vw; margin-top: 55px; }
.credential-columns h3 { margin: 0; padding-bottom: 8px; border-bottom: 2px solid var(--ink); font: 0.65rem var(--mono); text-transform: uppercase; }
.credential-item { padding: 20px 0; border-bottom: 1px solid var(--rule); }
.credential-item p { margin: 0; font-family: var(--serif); font-size: 1.3rem; }
.credential-item p + p { margin-top: 5px; color: var(--muted); font-family: var(--sans); font-size: 0.72rem; }
.reference-list { display: grid; grid-template-columns: 1fr 1fr; margin-top: 55px; border-top: 2px solid var(--ink); }
.reference-list figure { margin: 0; padding: 25px 30px 25px 0; border-bottom: 1px solid var(--ink); }
.reference-list figure:nth-child(odd) { border-right: 1px solid var(--hairline); }
.reference-list figure:nth-child(even) { padding-left: 30px; }
blockquote { margin: 0; }
blockquote p { margin: 0; font-family: var(--serif); font-size: 1.15rem; line-height: 1.35; }
figcaption { display: flex; flex-direction: column; margin-top: 20px; font: 0.64rem var(--mono); text-transform: uppercase; }
figcaption span { margin-top: 3px; color: var(--muted); }

footer { display: grid; grid-template-columns: 1fr 2fr 1fr; gap: 2vw; padding: 28px 3.5vw 60px; font: 0.62rem var(--mono); text-transform: uppercase; }
footer p { margin: 0; }
footer a { justify-self: center; }
.coordinates { justify-self: end; color: var(--accent); }

@media (max-width: 800px) {
  body { background-size: 25vw 100%, 100% 32px; }
  .identity { grid-template-columns: 1fr; min-height: 0; padding-top: 55px; }
  .role { max-width: 34ch; }
  .primary-nav { overflow-x: auto; }
  .intro, .capabilities, .credentials, .references, .ledger-header { grid-template-columns: 1fr; }
  .intro { padding-block: 50px; }
  .contact-note { margin-top: 20px; }
  .filter-panel { margin-left: 0; }
  .entry { grid-template-columns: 40px 1fr; }
  .entry::before { left: 40px; }
  .entry-heading, .tech-index, .entry-detail { grid-column: 2; }
  .tech-index { margin-top: 8px; }
  .entry-detail[open] { grid-column: 2; }
  .detail-body { grid-template-columns: 1fr; }
  .skill-plot { grid-template-columns: 1fr 1fr; }
  .credential-columns, .reference-list { grid-template-columns: 1fr; }
  .reference-list figure:nth-child(odd) { border-right: 0; }
  .reference-list figure:nth-child(even) { padding-left: 0; }
  footer { grid-template-columns: 1fr; }
  footer a, .coordinates { justify-self: start; }
}

@media (max-width: 480px) {
  .masthead, .ruled-section { margin-inline: 18px; }
  .masthead { padding-inline: 0; }
  .masthead-kicker span:last-child { display: none; }
  h1 { font-size: clamp(3.8rem, 20vw, 6rem); }
  .skill-plot { grid-template-columns: 1fr; }
  .capability-field::after { display: none; }
  footer { padding-inline: 18px; }
}

@media print {
  body { background: var(--paper); }
  .primary-nav, .filter-panel, .skip-link { display: none !important; }
  .entry { break-inside: avoid; }
  .entry-detail { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}