/* ════════════════════════════════════════════════════════════
   RS-2028CE DATASHEET — stylesheet
   Palette:
     --paper   #FFFFFF   sheet
     --ink     #111417   primary text
     --ink-2   #5A6169   secondary text / conditions
     --rule    #C9CFD4   table rules, hairlines
     --accent  #0F62FE   IBM blue — links, highlights, active variant
     --tint    #EDF5FF   accent tint for highlighted rows
   Type:
     display  Archivo Narrow (condensed, uppercase section heads)
     body     IBM Plex Sans
     utility  IBM Plex Mono
   ════════════════════════════════════════════════════════════ */

:root {
  --paper: #ffffff;
  --ink: #111417;
  --ink-2: #5a6169;
  --rule: #c9cfd4;
  --accent: #0f62fe;
  --accent-deep: #0043ce;
  --tint: #edf5ff;
  --term-bg: #101418;
  --term-fg: #d7dde2;
  --term-green: #7ce38b;
  --term-accent: #58a6ff;
}

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

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

body {
  background: #e9ebed;
  color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.mono { font-family: "IBM Plex Mono", ui-monospace, monospace; }
.small { font-size: 12px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

kbd {
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 3px;
  padding: 0 4px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
}

button.linklike {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: inherit;
  padding: 0;
}
button.linklike:hover { text-decoration: underline; }

/* ─────────────── SHEET ─────────────── */

.sheet {
  max-width: 1000px;
  margin: 0 auto;
  background: var(--paper);
  min-height: 100vh;
  padding: 0 48px 40px;
  box-shadow: 0 0 24px rgba(17, 20, 23, 0.12);
}

/* ─────────────── DOC HEADER ─────────────── */

.doc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 0 12px;
  border-bottom: 3px solid var(--ink);
}

.doc-brand { display: flex; align-items: center; gap: 10px; }

.brand-name {
  font-family: "Archivo Narrow", sans-serif;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.06em;
}

.doc-meta { font-size: 12px; color: var(--ink-2); text-align: right; }
.doc-meta-sep { margin: 0 6px; color: var(--rule); }
#part-code { color: var(--accent); font-weight: 600; }

/* ─────────────── TITLE BLOCK ─────────────── */

.title-block { padding: 26px 0 18px; border-bottom: 1px solid var(--rule); }

.title-block h1 {
  font-family: "Archivo Narrow", sans-serif;
  font-weight: 700;
  font-size: clamp(26px, 4.5vw, 40px);
  line-height: 1.1;
  letter-spacing: 0.01em;
}
.title-block h1 .part-num { color: var(--accent); font-weight: 600; }

.title-block h1 { font-size: clamp(30px, 5.2vw, 46px); }

.subtitle { margin-top: 10px; font-size: clamp(16px, 2.2vw, 20px); color: var(--ink); }

/* proof strip — slim credibility row, scannable in one glance */
.proof {
  margin-top: 14px;
  font-size: 12px;
  color: var(--ink-2);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  align-items: baseline;
}
.proof-sep { color: var(--rule); }

/* hero call-to-action row */
.hero-cta { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 10px; }
.hero-btn {
  display: inline-block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  padding: 9px 16px;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: var(--paper);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.hero-btn:hover { background: var(--ink); color: #fff; text-decoration: none; }
.hero-btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.hero-btn.primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
#resume-cell { display: contents; }

/* ─────────────── VARIANT SELECT ─────────────── */

.variant-select {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}

.variant-label { font-size: 11px; color: var(--ink-2); flex: none; }

.variant-btns { display: flex; gap: 6px; flex-wrap: wrap; }

.variant-btns button {
  font-size: 11.5px;
  padding: 5px 10px;
  background: var(--paper);
  border: 1px solid var(--rule);
  color: var(--ink-2);
  cursor: pointer;
  letter-spacing: 0.03em;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.variant-btns button:hover { border-color: var(--ink); color: var(--ink); }
.variant-btns button.active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}
.variant-btns button.active::before { content: "▸ "; color: var(--accent); }

/* ─────────────── SECTIONS ─────────────── */

.sec { padding: 26px 0 6px; }

.sec h2 {
  font-family: "Archivo Narrow", sans-serif;
  font-weight: 700;
  font-size: 19px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 6px;
  margin-bottom: 14px;
}

.sec-num {
  color: var(--accent);
  margin-right: 8px;
  font-family: "IBM Plex Mono", monospace;
  font-weight: 600;
}

.sec-note {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 400;
  font-size: 12.5px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink-2);
}

/* ─────────────── FRONT COLUMNS ─────────────── */

.front-cols {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 0 40px;
}

/* ─────────────── FEATURES / APPLICATIONS ─────────────── */

.features, .applications { list-style: none; }

.features li, .applications li {
  position: relative;
  padding: 3px 0 3px 18px;
  font-size: 13.5px;
  transition: opacity 0.2s;
}
.features li::before, .applications li::before {
  content: "■";
  position: absolute;
  left: 0;
  top: 4px;
  font-size: 9px;
  color: var(--ink);
}

.desc { font-size: 14px; margin-bottom: 16px; }

/* persona dimming: anything with data-p not matching active persona fades */
.dimmed { opacity: 0.32; }
.lit::before { color: var(--accent) !important; }

/* ─────────────── TABLES ─────────────── */

.table-scroll { overflow-x: auto; }

.info-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.info-table caption {
  text-align: left;
  font-size: 11px;
  color: var(--ink-2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding-bottom: 6px;
}
.info-table th, .info-table td {
  border: 1px solid var(--rule);
  padding: 7px 10px;
  text-align: left;
  vertical-align: top;
}
.info-table th {
  width: 34%;
  background: #f4f6f7;
  font-weight: 600;
  font-size: 12.5px;
}

.spec-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.spec-table thead th {
  background: var(--ink);
  color: #fff;
  font-family: "Archivo Narrow", sans-serif;
  font-size: 13px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 7px 10px;
  text-align: left;
  white-space: nowrap;
}
.spec-table td {
  border: 1px solid var(--rule);
  padding: 8px 10px;
  vertical-align: top;
}
.spec-table tbody tr { transition: background 0.2s, opacity 0.2s; }
.spec-table tbody tr.lit { background: var(--tint); }
.spec-table tbody tr.lit td:first-child::before {
  content: "▸ ";
  font-family: "IBM Plex Mono", monospace;
  color: var(--accent);
}

.td-sub {
  display: block;
  font-size: 11.5px;
  color: var(--ink-2);
  margin-top: 2px;
}

.fig-caption {
  font-size: 11px;
  color: var(--ink-2);
  margin: 10px 0 4px;
}

/* ─────────────── PINOUT ─────────────── */

.pinout-wrap { max-width: 620px; margin: 0 auto; }
#pinout { width: 100%; height: auto; display: block; }

.pkg-body { fill: #f4f6f7; stroke: var(--ink); stroke-width: 2; }
.pkg-notch { fill: var(--paper); stroke: var(--ink); stroke-width: 2; }
.pkg-label { font-size: 15px; letter-spacing: 0.35em; fill: var(--ink-2); }

.pin-stub { fill: #dfe3e6; stroke: var(--ink); stroke-width: 1.4; }
.pin-num { font-size: 10px; fill: var(--ink-2); }
.pin-name { font-size: 12.5px; font-weight: 600; fill: var(--ink); }
.pin-fn { font-size: 10.5px; fill: var(--ink-2); }

.pin { cursor: default; }
.pin:hover .pin-stub, .pin.lit .pin-stub { fill: var(--accent); }
.pin:hover .pin-name, .pin.lit .pin-name { fill: var(--accent); }
.pin.dim { opacity: 0.32; }

/* ─────────────── PROJECTS ─────────────── */

.projects {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.proj {
  border: 1px solid var(--rule);
  padding: 14px 16px 12px;
  position: relative;
  cursor: pointer;
  transition: opacity 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.proj:hover { border-color: var(--ink); }
.proj:hover .proj-more { color: var(--accent); }
.proj:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.proj-more {
  display: block;
  margin-top: 10px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  color: var(--ink-2);
  transition: color 0.15s;
}
.proj::before {
  content: "FIG. " attr(data-fig);
  position: absolute;
  top: -1px;
  right: -1px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 9.5px;
  letter-spacing: 0.08em;
  color: var(--ink-2);
  background: #f4f6f7;
  border: 1px solid var(--rule);
  padding: 2px 7px;
}
.proj.lit { border-color: var(--accent); }
.proj.lit::before { background: var(--tint); color: var(--accent); border-color: var(--accent); }
.proj.dimmed { opacity: 0.38; }

.proj h3 {
  font-family: "Archivo Narrow", sans-serif;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 4px;
  padding-right: 74px;
}
.proj-tags { font-size: 11px; color: var(--accent); margin-bottom: 6px; }
.proj p:not(.proj-tags) { font-size: 13px; color: var(--ink); }

.proj-fig {
  margin: 10px 0 2px;
  border: 1px solid var(--rule);
  background: #fff;
}
.proj-fig img {
  display: block;
  width: 100%;
  height: 150px;
  object-fit: contain;
  padding: 8px;
  box-sizing: border-box;
}
.proj-fig.tall img { height: 280px; }
.proj-fig.wide img { height: 130px; }
.proj-fig a { display: block; }
.proj-fig a:hover img { opacity: 0.85; }

/* company logo tiles — white/transparent logo needs its brand background */
.proj-fig.logo-tile { background: #1e3a8a; border-color: #1e3a8a; }
.proj-fig.logo-tile img { height: 118px; padding: 20px; background: transparent; }
.proj-fig.logo-tile-light img { height: 90px; padding: 22px; }
.proj-fig figcaption {
  font-size: 10px;
  color: var(--ink-2);
  border-top: 1px solid var(--rule);
  padding: 4px 8px;
}

.proj-src { display: inline-block; margin-top: 8px; font-size: 11px; }
a.proj-src + a.proj-src { margin-left: 16px; }
span.proj-src { color: var(--ink-2); }

.proj-term-btn {
  display: block;
  margin-top: 10px;
  padding: 7px 11px;
  background: var(--ink);
  border: 1px solid var(--ink);
  color: #fff;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.proj-term-btn:hover { background: var(--accent); border-color: var(--accent); }

/* ─────────────── ORDERING ─────────────── */

.order-cols {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  align-items: start;
}

.order-table tbody tr { cursor: pointer; }
.order-table tbody tr:hover td { background: #f4f6f7; }
.order-table tbody tr.lit td { background: var(--tint); }
.order-table tbody tr.lit td:first-child { color: var(--accent); font-weight: 600; }
.order-table tbody tr.lit td:first-child::before { content: "▸ "; }

.order-lead { font-size: 13px; color: var(--ink-2); margin-bottom: 12px; }

.contact-btn {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  border: 1px solid var(--ink);
  padding: 9px 12px;
  margin-bottom: 8px;
  color: var(--ink);
  transition: background 0.15s, color 0.15s;
}
.contact-btn:hover { background: var(--ink); color: #fff; text-decoration: none; }
.contact-btn.alt { background: var(--accent); border-color: var(--accent); color: #fff; }
.contact-btn.alt:hover { background: var(--accent-deep); border-color: var(--accent-deep); }

/* ─────────────── REV HISTORY / FOOTER ─────────────── */

.rev-table td:first-child { color: var(--accent); font-weight: 600; white-space: nowrap; }
.rev-table td:nth-child(2) { white-space: nowrap; }

.doc-footer {
  margin-top: 30px;
  border-top: 3px solid var(--ink);
  padding-top: 14px;
}
.fine { font-size: 10.5px; color: var(--ink-2); margin-bottom: 6px; }

/* ─────────────── PROJECT DRAWER ─────────────── */

#drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(10, 12, 14, 0.5);
  opacity: 0;
  transition: opacity 0.28s ease;
}
#drawer-backdrop.open { opacity: 1; }
#drawer-backdrop[hidden] { display: none; }

#drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 81;
  width: min(480px, 100%);
  height: 100vh;
  background: var(--paper);
  border-left: 3px solid var(--ink);
  box-shadow: -18px 0 50px rgba(17, 20, 23, 0.28);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.28s ease;
}
#drawer.open { transform: translateX(0); }
#drawer[hidden] { display: none; }

.drawer-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 2px solid var(--ink);
  flex: none;
}
.drawer-fig {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
}
#drawer-close {
  background: none;
  border: 1px solid var(--rule);
  color: var(--ink);
  cursor: pointer;
  font-size: 13px;
  padding: 3px 9px;
  line-height: 1;
}
#drawer-close:hover { background: var(--ink); color: #fff; }

.drawer-body { overflow-y: auto; padding: 20px; }

.drawer-body h2 {
  font-family: "Archivo Narrow", sans-serif;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 6px;
}
.drawer-tags {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11.5px;
  color: var(--accent);
  margin-bottom: 14px;
}
.drawer-body p { font-size: 13.5px; margin-bottom: 12px; }

.drawer-gallery { display: grid; gap: 12px; margin: 6px 0 16px; }
.drawer-shot { border: 1px solid var(--rule); background: #fff; }
.drawer-shot a { display: block; }
.drawer-shot img {
  display: block;
  width: 100%;
  max-height: 300px;
  object-fit: contain;
  background: #f4f6f7;
}
.drawer-shot figcaption {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10.5px;
  color: var(--ink-2);
  padding: 6px 9px;
  border-top: 1px solid var(--rule);
}

.drawer-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; }
.drawer-links a {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  border: 1px solid var(--ink);
  padding: 7px 12px;
  color: var(--ink);
  transition: background 0.15s, color 0.15s;
}
.drawer-links a:hover { background: var(--ink); color: #fff; text-decoration: none; }
.drawer-links a.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.drawer-links a.accent:hover { background: var(--accent-deep); border-color: var(--accent-deep); }

.drawer-section-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin: 4px 0 8px;
}

@media (max-width: 520px) {
  #drawer { width: 100%; border-left: none; }
}

/* ─────────────── TERMINAL ─────────────── */

#terminal {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(10, 12, 14, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
#terminal[hidden] { display: none; }

.term-window {
  width: min(780px, 100%);
  height: min(560px, 90vh);
  background: var(--term-bg);
  border: 1px solid #2a3138;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.term-titlebar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: #1a2027;
  color: #8b949e;
  font-size: 12px;
  border-bottom: 1px solid #2a3138;
}
#term-close {
  background: none;
  border: none;
  color: #8b949e;
  cursor: pointer;
  font-size: 13px;
  padding: 2px 6px;
}
#term-close:hover { color: #fff; }

.term-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--term-fg);
  white-space: pre-wrap;
  word-break: break-word;
}
.term-body .t-green { color: var(--term-green); }
.term-body .t-accent { color: var(--term-accent); }
.term-body .t-dim { color: #8b949e; }
.term-body a { color: var(--term-accent); }

.term-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px 12px;
  border-top: 1px solid #2a3138;
}
.term-quick button {
  background: #1a2027;
  border: 1px solid #2a3138;
  color: var(--term-green);
  font-family: inherit;
  font-size: 11.5px;
  padding: 4px 9px;
  border-radius: 4px;
  cursor: pointer;
}
.term-quick button:hover { border-color: var(--term-green); }

.term-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid #2a3138;
}
.term-prompt { color: var(--term-green); font-size: 12.5px; flex: none; }
#term-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--term-fg);
  font-size: 12.5px;
  caret-color: var(--term-green);
}

/* ─────────────── ENTRY CONFIGURATOR ─────────────── */

#config-modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(10, 12, 14, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
#config-modal[hidden] { display: none; }

.cfg-card {
  width: min(520px, 100%);
  background: var(--paper);
  border-top: 4px solid var(--ink);
  padding: 26px 28px 22px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}

.cfg-eyebrow {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 8px;
}

.cfg-card h2 {
  font-family: "Archivo Narrow", sans-serif;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 6px;
}

.cfg-sub { font-size: 13px; color: var(--ink-2); margin-bottom: 18px; }

.cfg-options { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.cfg-options button {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  padding: 10px 12px;
  background: var(--paper);
  border: 1px solid var(--rule);
  cursor: pointer;
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
}
.cfg-options button .mono { font-size: 10.5px; font-weight: 400; color: var(--ink-2); }
.cfg-options button:hover {
  border-color: var(--accent);
  background: var(--tint);
}
.cfg-options button:hover .mono { color: var(--accent); }

.cfg-browse {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 9px 12px;
  background: none;
  border: none;
  border-top: 1px solid var(--rule);
  color: var(--ink-2);
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  cursor: pointer;
  text-align: center;
}
.cfg-browse:hover { color: var(--accent); }

@media (max-width: 480px) {
  .cfg-options { grid-template-columns: 1fr; }
}

/* ─────────────── RESPONSIVE ─────────────── */

@media (max-width: 640px) {
  .pin-fn { display: none; }
  .pin-name { font-size: 16px; }
  .pin-num { font-size: 12px; }
}

@media (max-width: 820px) {
  .sheet { padding: 0 20px 32px; }
  .front-cols { grid-template-columns: 1fr; }
  .projects { grid-template-columns: 1fr; }
  .order-cols { grid-template-columns: 1fr; }
  .doc-header { flex-direction: column; align-items: flex-start; gap: 4px; }
  .doc-meta { text-align: left; }
  .variant-select { flex-direction: column; align-items: flex-start; gap: 6px; }
  .variant-btns { overflow-x: auto; width: 100%; flex-wrap: nowrap; padding-bottom: 4px; }
  .variant-btns button { flex: none; }
}