/* ============================================================
   MS-HCS-2026. Datasheet portfolio variant
   Color scheme: paper/ink with red accent in dark theme,
   inverted to ink/paper with orange accent in light theme
   ============================================================ */

:root[data-theme="light"] {
  --bg:        #f0ebdc;
  --bg-alt:    #e5dfcc;
  --ink:       #1a1915;
  --ink-soft:  #4a4839;
  --ink-mute:  #85826f;
  --rule:      #b8b09a;
  --rule-soft: #d3ccb5;
  --accent:    #c1440e;
  --accent-2:  #e35f2a;
  --warn:      #7a5c0e;
  --ok:        #3c6b3a;
  --card:      #eae3cf;
}

:root[data-theme="dark"] {
  --bg:        #0e0f0c;
  --bg-alt:    #15160f;
  --ink:       #ede6cf;
  --ink-soft:  #b6af95;
  --ink-mute:  #6e6a54;
  --rule:      #353225;
  --rule-soft: #2a281e;
  --accent:    #e85d1a;
  --accent-2:  #ff7d44;
  --warn:      #e8b54e;
  --ok:        #7db36a;
  --card:      #15160f;
}

:root {
  --mono: 'IBM Plex Mono', 'SF Mono', Consolas, monospace;
  --serif: 'IBM Plex Serif', Georgia, serif;
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
  --w: 1180px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.6;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  background-image:
    radial-gradient(circle at 13% 27%, rgba(0,0,0,0.018) 0 1px, transparent 1px),
    radial-gradient(circle at 67% 81%, rgba(0,0,0,0.018) 0 1px, transparent 1px),
    radial-gradient(circle at 43% 59%, rgba(0,0,0,0.012) 0 1px, transparent 1px);
  background-size: 19px 19px, 23px 23px, 31px 31px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

:root[data-theme="dark"] body {
  background-image:
    radial-gradient(circle at 13% 27%, rgba(255,255,255,0.012) 0 1px, transparent 1px),
    radial-gradient(circle at 67% 81%, rgba(255,255,255,0.012) 0 1px, transparent 1px);
}

.serif { font-family: var(--serif); }
.sans  { font-family: var(--sans); }
.mono  { font-family: var(--mono); }

h1, h2, h3, h4 { font-weight: 600; line-height: 1.2; letter-spacing: -0.01em; }
a { color: inherit; text-decoration: none; }
strong { font-weight: 600; color: var(--ink); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-alt); }
::-webkit-scrollbar-thumb { background: var(--rule); border: 2px solid var(--bg-alt); }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

.sheet {
  max-width: var(--w);
  margin: 0 auto;
  padding: 0 2.5rem;
  position: relative;
}

.corner {
  position: fixed;
  width: 18px; height: 18px;
  border-color: var(--rule);
  z-index: 2;
  pointer-events: none;
}
.corner.tl { top: 14px; left: 14px; border-top: 1px solid; border-left: 1px solid; }
.corner.tr { top: 14px; right: 14px; border-top: 1px solid; border-right: 1px solid; }
.corner.bl { bottom: 14px; left: 14px; border-bottom: 1px solid; border-left: 1px solid; }
.corner.br { bottom: 14px; right: 14px; border-bottom: 1px solid; border-right: 1px solid; }

.topbar {
  border-bottom: 2px solid var(--ink);
  padding: 0.9rem 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.topbar-inner {
  max-width: var(--w);
  margin: 0 auto;
  padding: 0 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}
.topbar-left { color: var(--ink-soft); }
.topbar-left b { color: var(--ink); letter-spacing: 0.12em; }
.topbar-right { display: flex; gap: 1.25rem; align-items: center; }
.topbar-right a { color: var(--ink-soft); transition: color 0.15s; }
.topbar-right a:hover { color: var(--accent); }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.15s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

.cover {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--rule);
  position: relative;
}
.cover-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: end;
}

.part-label {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.part-number {
  font-family: var(--mono);
  font-size: clamp(3.5rem, 9vw, 6.5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 0.5rem;
}
.part-number .punct { color: var(--accent); }

.part-expansion {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}
.part-expansion b { color: var(--ink-soft); letter-spacing: 0.18em; font-weight: 500; }

.part-title {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: var(--ink-soft);
  margin-bottom: 2rem;
  max-width: 620px;
  line-height: 1.4;
}

.cover-meta {
  text-align: right;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  text-transform: uppercase;
  line-height: 2;
}
.cover-meta b { color: var(--ink); letter-spacing: 0.1em; }
.cover-meta a { color: var(--ink); border-bottom: 1px dashed var(--rule); transition: all 0.15s; }
.cover-meta a:hover { color: var(--accent); border-bottom-color: var(--accent); }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--rule);
}

.sh-label {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}

.feature-list, .app-list {
  list-style: none;
  font-family: var(--mono);
  font-size: 13px;
}
.feature-list li, .app-list li {
  padding: 0.4rem 0 0.4rem 1.2rem;
  position: relative;
  line-height: 1.5;
}
.feature-list li::before {
  content: '▪';
  position: absolute;
  left: 0.1rem;
  color: var(--accent);
}
.app-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.feature-list li b { color: var(--ink); }

section { padding: 3.5rem 0; border-bottom: 1px solid var(--rule); }

.section-header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: baseline;
  margin-bottom: 2rem;
}
.section-num {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.section-title {
  font-family: var(--serif);
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 500;
  color: var(--ink);
}
.section-rule {
  height: 1px;
  background: var(--ink);
  margin-top: 0.75rem;
}

.abs-max {
  background: var(--card);
  border: 1px solid var(--rule);
  padding: 1.75rem 2rem;
  margin-top: 1.5rem;
}
.abs-max-title {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  font-weight: 600;
}
.abs-max table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 13px;
}
.abs-max th, .abs-max td {
  padding: 0.55rem 0.9rem 0.55rem 0;
  text-align: left;
  border-bottom: 1px dotted var(--rule);
  vertical-align: baseline;
}
.abs-max tr:last-child th, .abs-max tr:last-child td { border-bottom: none; }
.abs-max th {
  font-weight: 400;
  color: var(--ink-soft);
  width: 40%;
}
.abs-max td {
  color: var(--ink);
  font-weight: 600;
}
.abs-max td .unit { color: var(--ink-mute); font-weight: 400; margin-left: 0.3rem; font-size: 11px; }

.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  align-items: start;
}
.about-prose {
  font-family: var(--serif);
  font-size: 16.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}
.about-prose p + p { margin-top: 1rem; }
.about-prose strong { color: var(--ink); font-weight: 600; }
.about-prose em { color: var(--accent); font-style: italic; }

.about-prose a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}
.about-prose a:hover { background: var(--accent); color: var(--bg); }

.block-diagram {
  margin: 3rem 0 0;
  padding: 2rem;
  background: var(--card);
  border: 1px solid var(--rule);
}
.block-diagram-title {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  font-weight: 600;
  text-align: center;
}
.block-diagram svg { width: 100%; height: auto; display: block; }
.block-diagram svg text { font-family: var(--mono); }
.block-diagram .bd-box {
  fill: var(--bg);
  stroke: var(--ink);
  stroke-width: 1.2;
}
.block-diagram .bd-box-accent {
  fill: var(--bg);
  stroke: var(--accent);
  stroke-width: 1.5;
}
.block-diagram .bd-wire {
  stroke: var(--ink-soft);
  stroke-width: 1;
  fill: none;
}
.block-diagram .bd-wire-accent {
  stroke: var(--accent);
  stroke-width: 1.3;
  fill: none;
}
.block-diagram .bd-wire-soft {
  stroke: var(--ink-mute);
  stroke-width: 0.8;
  fill: none;
}
.block-diagram .bd-label {
  fill: var(--ink);
  font-size: 11px;
  font-weight: 600;
}
.block-diagram .bd-label-mute {
  fill: var(--ink-mute);
  font-size: 9px;
  letter-spacing: 0.1em;
}
.block-diagram .bd-label-italic {
  fill: var(--ink-soft);
  font-size: 9.5px;
  font-style: italic;
  font-family: var(--serif);
}
.block-diagram .bd-dot {
  fill: var(--accent);
}
.block-diagram .bd-bracket {
  stroke: var(--ink-mute);
  stroke-width: 1;
  fill: none;
}

.elec-char {
  margin-top: 1rem;
}
.elec-char-intro {
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-soft);
  margin-bottom: 2rem;
  font-size: 15.5px;
}
.project {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px dotted var(--rule);
  align-items: start;
}
.project:last-child { border-bottom: none; }

.project-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-transform: uppercase;
  padding-top: 0.2rem;
  line-height: 1.5;
}
.project-tag.work { color: var(--warn); }

.project-body h3 {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  color: var(--ink);
}
.project-body p {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.6;
}
.project-body .params {
  margin-top: 0.6rem;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}
.project-body .params span {
  display: inline-block;
  margin-right: 1.2rem;
  padding-right: 1.2rem;
  border-right: 1px solid var(--rule);
}
.project-body .params span:last-child {
  border-right: none;
}
.project-link {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  text-transform: uppercase;
  border: 1px solid var(--rule);
  padding: 4px 10px;
  transition: all 0.15s;
  white-space: nowrap;
  margin-top: 0.2rem;
}
.project-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.live-log {
  margin: 0 0 2rem 0;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--accent);
  background: var(--bg-alt);
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.live-log .live-log-text { flex: 1 1 auto; }
.live-log .live-log-text b { color: var(--ink); letter-spacing: 0.05em; }
.live-log a {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-transform: uppercase;
  border: 1px solid var(--accent);
  padding: 5px 12px;
  transition: all 0.15s;
  white-space: nowrap;
}
.live-log a:hover {
  background: var(--accent);
  color: var(--bg);
}

.revision {
  margin-top: 1rem;
}
.revision table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12.5px;
}
.revision thead th {
  text-align: left;
  padding: 0.5rem 1rem 0.5rem 0;
  border-bottom: 1.5px solid var(--ink);
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--ink-mute);
  text-transform: uppercase;
  font-weight: 600;
}
.revision tbody td {
  padding: 1rem 1rem 1rem 0;
  vertical-align: top;
  border-bottom: 1px dotted var(--rule);
}
.revision tbody tr:last-child td { border-bottom: none; }
.revision .col-rev { width: 80px; color: var(--accent); font-weight: 700; }
.revision .col-date { width: 110px; color: var(--ink-mute); white-space: nowrap; }
.revision .col-role { width: 180px; color: var(--ink); font-weight: 600; }
.revision .col-changes {
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 14px;
  line-height: 1.5;
}
.revision .col-changes ul {
  list-style: none;
  padding: 0;
}
.revision .col-changes li {
  padding-left: 1rem;
  position: relative;
  margin-bottom: 0.35rem;
}
.revision .col-changes li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--ink-mute);
}
.revision .col-changes strong { color: var(--ink); }

.notes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}
.note {
  border: 1px solid var(--rule);
  padding: 1.5rem;
  background: var(--card);
  transition: border-color 0.15s;
}
.note:hover { border-color: var(--accent); }
.note-label {
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}
.note h4 {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--ink);
}
.note p {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.55;
}
.note p + p { margin-top: 0.5rem; }
.note a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

.ordering {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-top: 1.5rem;
}
.order-block {
  border: 1px solid var(--rule);
  padding: 2rem;
  background: var(--card);
}
.order-block h3 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}
.order-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px dotted var(--rule);
  font-family: var(--mono);
  font-size: 12.5px;
}
.order-row:last-child { border-bottom: none; }
.order-row .k { color: var(--ink-mute); letter-spacing: 0.08em; font-size: 10.5px; text-transform: uppercase; padding-top: 3px; }
.order-row .v { color: var(--ink); }
.order-row .v a { color: var(--ink); }
.order-row .v a:hover { color: var(--accent); }

.availability {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}
.availability .status {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--ok);
  color: var(--ok);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 1rem;
}
.availability p { margin-bottom: 0.8rem; font-family: var(--serif); font-size: 14px; color: var(--ink-soft); line-height: 1.6; }
.availability-tags {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.availability-tag {
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 3px 8px;
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  text-transform: uppercase;
}

footer {
  padding: 2.5rem 0 3.5rem;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
  text-transform: uppercase;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: center;
  max-width: var(--w);
  margin: 0 auto;
  padding-left: 2.5rem;
  padding-right: 2.5rem;
  border-top: 2px solid var(--ink);
  margin-top: 0;
}
footer .center { text-align: center; }
footer .right { text-align: right; }
footer b { color: var(--ink); letter-spacing: 0.15em; }

@media (max-width: 900px) {
  .sheet { padding: 0 1.5rem; }
  .topbar-inner { padding: 0 1.5rem; flex-wrap: wrap; gap: 0.75rem; }
  .topbar-right { flex-wrap: wrap; }
  .cover-grid { grid-template-columns: 1fr; gap: 2rem; }
  .cover-meta { text-align: left; }
  .two-col, .about-grid, .ordering { grid-template-columns: 1fr; gap: 2rem; }
  .section-header { grid-template-columns: 1fr; gap: 0.5rem; }
  .notes { grid-template-columns: 1fr 1fr; }
  .project { grid-template-columns: 1fr; gap: 0.6rem; }
  .project-tag { padding-top: 0; }
  .project-link { align-self: start; }
  .revision .col-date { display: none; }
  .live-log { flex-direction: column; align-items: flex-start; }
  footer { grid-template-columns: 1fr; text-align: center; padding: 2.5rem 1.5rem; }
  footer .right { text-align: center; }
}
@media (max-width: 560px) {
  .notes { grid-template-columns: 1fr; }
  .revision .col-role { display: none; }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.reveal { animation: fade-up 0.6s ease-out both; }
.reveal-d1 { animation-delay: 0.08s; }
.reveal-d2 { animation-delay: 0.16s; }
.reveal-d3 { animation-delay: 0.24s; }
.reveal-d4 { animation-delay: 0.32s; }

@keyframes blink { 50% { opacity: 0; } }
.cursor {
  display: inline-block;
  color: var(--accent);
  animation: blink 1.1s step-end infinite;
  margin-left: 0.15em;
  font-weight: 400;
  font-size: 0.55em;
  vertical-align: 0.15em;
  line-height: 1;
}

.revision tbody tr { transition: background 0.15s; }
.revision tbody tr:hover { background: var(--bg-alt); }

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

/* ---------------------------------------------------------------------------
   Utility classes. These replace inline style="" attributes, which had to go
   so the Content-Security-Policy could drop 'unsafe-inline' from style-src.
   Selectors are doubled on purpose: an inline style beat every rule in this
   file, and a single class would not (see .cover-meta b). Doubling restores
   the original precedence without resorting to !important.
   ------------------------------------------------------------------------ */
.btn-accent.btn-accent { color: var(--accent); border: 1px solid var(--accent); padding: 4px 10px; }
.cover-ruled.cover-ruled { border-bottom: 2px solid var(--ink); }
.accent.accent { color: var(--accent); }
.sec-ruled.sec-ruled { border-bottom: 1px solid var(--rule); padding: 2.5rem 0; }
.sec-tight.sec-tight { padding-top: 2rem; padding-bottom: 0; border-bottom: none; }
.pt-3.pt-3 { padding-top: 3rem; }
.w-80.w-80 { width: 80px; }
.note-accent.note-accent { color: var(--accent); margin-top: 0.75rem; font-size: 11px; letter-spacing: 0.05em; }