/* ==========================================================================
   LATERALVISION LLC — SWISS ASYMMETRIC BROADSHEET (24.5% : 75.5% Lateral Axis)
   Mineral Paper (#F5F6F8) / Carbon Slate (#0C0E12) + Optical Cobalt
   Cloudflare Pages + Functions + D1 + R2 Production Stylesheet
   ========================================================================== */

:root {
  color-scheme: light;
  --bg: #F5F6F8;
  --bg-elevated: #FFFFFF;
  --bg-subtle: #EBEEF2;
  --ink: #0F1217;
  --ink-body: #262B35;
  --muted: #646D7C;
  --faint: #8C95A4;
  --accent: #1D4ED8;
  --accent-soft: rgba(29, 78, 216, 0.09);
  --status-live: #15803D;
  --status-wait: #B45309;
  --danger: #DC2626;
  --rule: rgba(15, 18, 23, 0.11);
  --rule-strong: rgba(15, 18, 23, 0.24);

  --font-serif: 'Newsreader', 'Baskerville', 'Georgia', 'Songti TC', 'Noto Serif TC', serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'PingFang TC', sans-serif;
  --font-ja-mincho: 'Hiragino Mincho ProN', 'Hiragino Mincho Pro', 'YuMincho', 'Yu Mincho', 'Shippori Mincho', 'Noto Serif JP', 'MS PMincho', serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

html.dark,
body.dark {
  color-scheme: dark;
  --bg: #0C0E12;
  --bg-elevated: #12161E;
  --bg-subtle: #181D27;
  --ink: #EDF0F5;
  --ink-body: #C9D0DC;
  --muted: #8A94A6;
  --faint: #636D7E;
  --accent: #60A5FA;
  --accent-soft: rgba(96, 165, 250, 0.13);
  --status-live: #4ADE80;
  --status-wait: #FBBF24;
  --danger: #F87171;
  --rule: rgba(237, 240, 245, 0.11);
  --rule-strong: rgba(237, 240, 245, 0.26);
}

/* Right Broadsheet Japanese Typography -> Mincho (明朝体); Left Rail Stays English */
.broadsheet-main[lang="ja"],
.broadsheet-main[lang="ja"] .hero-headline,
.broadsheet-main[lang="ja"] .hero-prose,
.broadsheet-main[lang="ja"] .section-bar h2,
.broadsheet-main[lang="ja"] .ledger-body h3,
.broadsheet-main[lang="ja"] .ledger-body p,
.broadsheet-main[lang="ja"] .spec-desc h3,
.broadsheet-main[lang="ja"] .spec-desc p,
.broadsheet-main[lang="ja"] .article-title,
.broadsheet-main[lang="ja"] .article-subtitle,
.broadsheet-main[lang="ja"] .swiss-prose p,
.broadsheet-main[lang="ja"] .swiss-prose blockquote,
.broadsheet-main[lang="ja"] .margin-note,
.broadsheet-main[lang="ja"] .swiss-card h3,
.broadsheet-main[lang="ja"] .swiss-card p,
.broadsheet-main[lang="ja"] .photo-plate h3,
.broadsheet-main[lang="ja"] .photo-plate p,
.broadsheet-main[lang="ja"] .inquiry-box h2,
.broadsheet-main[lang="ja"] .inquiry-box p,
.broadsheet-main[lang="ja"] .series-index-item h4,
.broadsheet-main[lang="ja"] .comment-body,
.broadsheet-main[lang="ja"] .form-field input,
.broadsheet-main[lang="ja"] .form-field select,
.broadsheet-main[lang="ja"] .form-field textarea {
  font-family: var(--font-ja-mincho);
}

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

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Atomic Zero-Flash Theme Switch Lock: suppresses unsynchronized hover transitions
   across links/cards/borders so all surfaces repaint in a single frame while the
   cat-eye pupil retains its smooth aperture dilation. */
html.theme-switching *,
html.theme-switching *::before,
html.theme-switching *::after {
  transition: none !important;
}

html.theme-switching .cat-eye-btn .cat-pupil,
html.theme-switching .cat-eye-btn .cat-glint {
  transition: transform 0.36s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.26s ease !important;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

a:hover {
  color: var(--accent);
}

/* 24.5% : 75.5% Asymmetric Master Layout */
.broadsheet-shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(265px, 24.5%) 1fr;
  grid-template-rows: 1fr auto;
  min-height: 100vh;
  max-width: 1520px;
  margin: 0 auto;
  border-left: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
}

/* Left Sticky Lateral Axis Rail */
.lateral-rail {
  grid-column: 1;
  grid-row: 1 / span 2;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  border-right: 1px solid var(--rule-strong);
  padding: 32px 26px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
  background: var(--bg);
}

.brand-mark {
  display: block;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
}

.brand-title {
  font-family: var(--font-sans);
  font-size: 1.18rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.15;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 5px;
}

/* Top-Right Utility Controls: [Sidebar/Menu] + [Single Lang Dropdown] + [Cat-Eye] */
.top-corner-controls {
  position: absolute;
  top: 28px;
  right: 44px;
  z-index: 35;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Sidebar / Mobile Directory Toggle Button */
.rail-toggle-btn {
  background: var(--bg-subtle);
  border: 1px solid var(--rule-strong);
  color: var(--muted);
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.rail-toggle-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-elevated);
}

.rail-toggle-btn svg {
  width: 18px;
  height: 18px;
  display: block;
}

.rail-toggle-btn .icon-desktop-rail {
  display: block;
}

.rail-toggle-btn .icon-mobile-menu {
  display: none;
}

.rail-toggle-btn .rail-pane-fill {
  transition: opacity 0.2s ease;
}

@media (min-width: 1025px) {
  html.rail-collapsed .rail-toggle-btn .rail-pane-fill {
    opacity: 0;
  }
}

.rail-toggle-btn .m-line-1,
.rail-toggle-btn .m-line-2,
.rail-toggle-btn .m-line-3 {
  transform-origin: 12px 12px;
  transition: transform 0.22s ease, opacity 0.18s ease;
}

/* Single-Button Language Dropdown */
.lang-dropdown {
  position: relative;
}

.lang-trigger-btn {
  background: var(--bg-subtle);
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  height: 32px;
  min-width: 48px;
  padding: 0 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.lang-trigger-btn:hover,
.lang-dropdown.is-open .lang-trigger-btn {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-elevated);
}

.lang-caret {
  font-size: 0.62rem;
  color: var(--faint);
  transition: transform 0.18s ease, color 0.18s ease;
}

.lang-dropdown.is-open .lang-caret {
  transform: rotate(180deg);
  color: var(--accent);
}

.lang-menu {
  display: none;
  position: absolute;
  top: calc(100% + 5px);
  right: 0;
  min-width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  padding: 3px;
  flex-direction: column;
  gap: 2px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
  z-index: 45;
}

.lang-dropdown.is-open .lang-menu {
  display: flex;
}

.lang-option {
  background: transparent;
  border: none;
  border-radius: 5px;
  color: var(--ink-body);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  height: 28px;
  padding: 0 10px;
  text-align: center;
  cursor: pointer;
  white-space: nowrap;
}

.lang-option:hover {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

/* Hide currently selected language from dropdown so only the other two unfold */
.lang-option.active {
  display: none;
}

/* LateralVision Optical Cat-Eye Lighting Button (Sibling to hanabi.blog, tuned in Optical Cobalt) */
.cat-eye-btn {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  color: var(--accent);
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.cat-eye-btn:hover {
  background: var(--accent);
  color: var(--bg);
}

.cat-eye-btn svg {
  width: 20px;
  height: 20px;
  display: block;
}

.cat-eye-btn .cat-eye-outline {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.65;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cat-eye-btn .cat-iris {
  fill: none;
  stroke: currentColor;
  stroke-width: 0.9;
  opacity: 0.42;
}

.cat-eye-btn .cat-pupil {
  fill: currentColor;
  transform-origin: 12px 12px;
  transition: transform 0.36s cubic-bezier(0.22, 1, 0.36, 1);
}

.cat-eye-btn .cat-glint {
  fill: var(--bg);
  opacity: 0;
  transition: opacity 0.26s ease;
}

html.dark .cat-eye-btn .cat-pupil,
body.dark .cat-eye-btn .cat-pupil {
  transform: scaleX(3.35);
}

html.dark .cat-eye-btn .cat-glint,
body.dark .cat-eye-btn .cat-glint {
  opacity: 0.9;
}

html.dark .cat-eye-btn:hover .cat-glint,
body.dark .cat-eye-btn:hover .cat-glint {
  fill: var(--accent);
}

/* Backstage Session Status Strip */
.rail-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  padding: 8px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

/* Numbered Vertical Navigation (01 - 04) + Expandable Writing Sub-directory */
.rail-nav {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
}

.rail-nav > a,
.rail-nav .nav-dropdown-trigger {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  padding: 9px 0;
  border: none;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--muted);
  text-align: left;
  cursor: pointer;
  transition: color 0.18s ease;
}

.rail-nav .nav-idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--faint);
}

.rail-nav > a:hover,
.rail-nav > a.active,
.rail-nav .nav-dropdown-trigger:hover,
.rail-nav .nav-dropdown-trigger.active {
  color: var(--ink);
  font-weight: 600;
}

.rail-nav > a.active .nav-idx,
.rail-nav .nav-dropdown-trigger.active .nav-idx {
  color: var(--accent);
}

.nav-caret {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--faint);
  transition: transform 0.2s ease, color 0.2s ease;
}

.nav-group.is-open .nav-caret {
  transform: rotate(180deg);
  color: var(--accent);
}

.nav-submenu {
  display: none;
  flex-direction: column;
  padding: 6px 0 8px 24px;
  border-bottom: 1px solid var(--rule);
}

.nav-group.is-open .nav-submenu {
  display: flex;
}

.rail-nav .nav-subitem {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 5px 0 5px 10px;
  border-bottom: none;
  border-left: 1.5px solid var(--rule-strong);
  font-size: 0.81rem;
  font-weight: 400;
  color: var(--muted);
}

.rail-nav .nav-subitem .sub-idx {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  color: var(--faint);
}

.rail-nav .nav-subitem:hover,
.rail-nav .nav-subitem.active {
  color: var(--ink);
  font-weight: 600;
  border-left-color: var(--accent);
}

.rail-nav .nav-subitem.active .sub-idx {
  color: var(--accent);
}

/* Bottom-Left Personnel Stack (Founder Dr. Y + Bonus Staff Hana) */
.personnel-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.founder-footnote {
  padding-top: 14px;
  border-top: 1px solid var(--rule-strong);
  font-size: 0.76rem;
  color: var(--muted);
  line-height: 1.55;
}

.founder-badge {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.07em;
  color: var(--accent);
  display: block;
  margin-bottom: 2px;
}

.founder-name {
  font-weight: 700;
  color: var(--ink);
  font-size: 0.84rem;
  display: block;
  margin-bottom: 4px;
}

.hana-footnote {
  padding-top: 13px;
  border-top: 1px dashed var(--rule-strong);
  font-size: 0.74rem;
  color: var(--muted);
  line-height: 1.5;
}

.hana-head {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 6px;
}

.hana-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--rule-strong);
  filter: grayscale(45%);
  transition: filter 0.25s ease, transform 0.25s ease;
}

.hana-footnote:hover .hana-avatar {
  filter: grayscale(0%);
  transform: scale(1.08);
}

.hana-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--faint);
  display: block;
}

.hana-name {
  font-weight: 600;
  color: var(--ink-body);
  font-size: 0.76rem;
}

.hana-link {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
}

/* Right 75.5% Main Broadsheet Canvas */
.broadsheet-main {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* Hero Section */
.swiss-hero {
  padding: 56px 44px 46px;
  border-bottom: 1px solid var(--rule-strong);
}

.swiss-hero .kicker,
.article-head .article-meta-row {
  padding-right: 148px;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.3vw, 2.95rem);
  font-weight: 400;
  line-height: 1.22;
  letter-spacing: -0.015em;
  max-width: 880px;
}

.hero-prose {
  margin-top: 18px;
  font-size: 0.96rem;
  color: var(--ink-body);
  line-height: 1.75;
  max-width: 760px;
}

.btn-swiss {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
  color: var(--ink);
  cursor: pointer;
}

.btn-swiss.primary {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

.btn-swiss.primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

.btn-swiss:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-swiss.danger {
  color: var(--danger);
  border-color: var(--danger);
}

.btn-swiss.danger:hover {
  background: var(--danger);
  color: #FFFFFF;
}

.chip-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
  color: var(--muted);
  cursor: pointer;
}

.chip-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.chip-btn.danger {
  color: var(--danger);
  border-color: var(--danger);
}

/* Broadsheet Content Blocks */
.sheet-section {
  padding: 44px 44px;
  border-bottom: 1px solid var(--rule-strong);
}

.section-bar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--ink);
  gap: 16px;
  flex-wrap: wrap;
}

.section-bar h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-bar .sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 2px;
}

.filter-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-pill {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  cursor: pointer;
}

.filter-pill.active,
.filter-pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

/* Writing Broadsheet Ledger Rows */
.writing-ledger {
  display: flex;
  flex-direction: column;
}

.ledger-row {
  display: grid;
  grid-template-columns: 155px 115px 1fr 32px;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}

.ledger-row:hover {
  background: var(--accent-soft);
  padding-left: 10px;
  padding-right: 10px;
  margin-left: -10px;
  margin-right: -10px;
}

.ledger-date {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--muted);
}

.ledger-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  padding: 2px 7px;
  border: 1px solid var(--rule-strong);
  display: inline-block;
  width: fit-content;
  color: var(--ink-body);
}

.ledger-tag.is-essay {
  border-color: var(--accent);
  color: var(--accent);
}

.ledger-body h3 {
  font-family: var(--font-serif);
  font-size: 1.38rem;
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: 6px;
}

.ledger-body p {
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 680px;
}

.ledger-arrow {
  font-family: var(--font-mono);
  color: var(--accent);
  text-align: right;
}

/* Swiss Spec Matrix for Apps & Services */
.spec-item {
  border-bottom: 1px solid var(--rule);
  padding: 22px 0;
  display: grid;
  grid-template-columns: 110px 180px 1fr auto;
  gap: 20px;
  align-items: start;
}

.spec-code {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--accent);
}

.spec-kind {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
}

.spec-status {
  display: inline-block;
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  padding: 2px 6px;
  background: var(--bg-subtle);
  border: 1px solid var(--rule);
  color: var(--ink);
}

.spec-desc h3 {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.spec-desc p {
  font-size: 0.9rem;
  color: var(--ink-body);
}

.spec-bullets {
  list-style: none;
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

.spec-bullets li::before {
  content: "▪ ";
  color: var(--accent);
}

/* Photography Page — Swiss Contact Plates Grid */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 28px;
}

.photo-plate {
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.plate-visual {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #10131A;
  border: 1px solid var(--rule);
  overflow: hidden;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.plate-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.plate-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.07em;
  color: var(--accent);
  margin-bottom: 6px;
}

.photo-plate h3 {
  font-family: var(--font-serif);
  font-size: 1.28rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.photo-plate p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
}

/* Reader Page — Asymmetric Prose + Sticky Marginalia */
.article-wrap {
  padding: 48px 44px 52px;
  border-bottom: 1px solid var(--rule-strong);
}

.article-head {
  max-width: 820px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule-strong);
  margin-bottom: 36px;
}

.article-meta-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
  margin-bottom: 14px;
}

.article-title {
  font-family: var(--font-serif);
  font-size: clamp(1.95rem, 3vw, 2.7rem);
  font-weight: 400;
  line-height: 1.22;
  margin-bottom: 14px;
}

.article-subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.18rem;
  color: var(--muted);
  line-height: 1.5;
}

.swiss-reader-grid {
  display: grid;
  grid-template-columns: minmax(0, 650px) minmax(210px, 260px);
  gap: 48px;
  align-items: start;
}

.swiss-prose p {
  font-family: var(--font-serif);
  font-size: 1.14rem;
  line-height: 1.85;
  color: var(--ink-body);
  margin-bottom: 22px;
}

.swiss-prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 1px 5px;
  background: var(--bg-subtle);
  border: 1px solid var(--rule);
}

.swiss-prose blockquote {
  margin: 28px 0;
  padding: 16px 22px;
  border-left: 3px solid var(--accent);
  background: var(--bg-elevated);
  font-family: var(--font-serif);
  font-size: 1.22rem;
  font-style: italic;
  color: var(--ink);
}

.sn-ref {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  margin-left: 2px;
  font-weight: 600;
}

.marginalia-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 28px;
}

.margin-note {
  border-top: 2px solid var(--accent);
  padding-top: 10px;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.55;
}

.margin-note strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink);
  margin-bottom: 4px;
}

.technical-figure {
  margin: 28px 0;
  padding: 20px;
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
}

.technical-figure img {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  display: block;
  border: 1px solid var(--rule);
}

.technical-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

/* Series Archive Index & Threaded Reader Margin Notes on /writing */
.series-index-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.series-index-item {
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.series-index-item:hover,
.series-index-item.is-current {
  border-color: var(--accent);
}

.series-index-item.is-current {
  background: var(--accent-soft);
}

.series-index-item .meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
}

.series-index-item h4 {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 500;
  line-height: 1.35;
}

.comments-wrap {
  max-width: 820px;
  margin-top: 20px;
}

.comment-node {
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.comment-director-box {
  margin-top: 10px;
  padding: 12px 16px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
}

.comment-nested-thread {
  margin-top: 8px;
  margin-left: 18px;
  padding-left: 14px;
  border-left: 1px solid var(--rule-strong);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.comment-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.comment-meta strong {
  color: var(--ink);
}

.comment-body {
  font-size: 0.92rem;
  color: var(--ink-body);
  line-height: 1.65;
  white-space: pre-line;
}

.replies-toggle-btn {
  margin-top: 8px;
  background: transparent;
  border: none;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  cursor: pointer;
}

/* Services Page Detailed Spec Cards & Interactive Preview */
.svc-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.swiss-card {
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

.swiss-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.mini-ui-window {
  border: 1px solid var(--rule);
  background: var(--bg);
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.inquiry-box {
  max-width: 720px;
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
  padding: 32px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 20px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-field label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 10px 12px;
  border: 1px solid var(--rule-strong);
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.lv-form-feedback {
  display: none;
  margin-top: 14px;
  padding: 10px 12px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink);
}

/* Studio Backstage (/backstage) Components */
.vault-list {
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  max-height: 520px;
}

.vault-item {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}

.vault-item-thumb {
  width: 64px;
  height: 44px;
  background: #10131A;
  border: 1px solid var(--rule-strong);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vault-item-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.vault-photo-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px 4px 4px;
  background: var(--bg);
  border: 1px solid var(--rule-strong);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink);
  cursor: pointer;
}

.vault-photo-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.vault-photo-chip img {
  width: 28px;
  height: 22px;
  object-fit: cover;
}

.audit-terminal {
  background: #0B0D12;
  color: #C9D3E3;
  border: 1px solid var(--rule-strong);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  line-height: 1.6;
  max-height: 360px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.sheet-footer {
  grid-column: 2;
  grid-row: 2;
  margin-top: auto;
  padding: 24px 44px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

/* Desktop Landscape: Collapsible Left Rail (Immersive Reading / Viewing Mode) */
@media (min-width: 1025px) {
  html.rail-collapsed .broadsheet-shell {
    grid-template-columns: 1fr;
  }
  html.rail-collapsed .lateral-rail {
    display: none;
  }
  html.rail-collapsed .broadsheet-main,
  html.rail-collapsed .sheet-footer {
    grid-column: 1;
    width: 100%;
    max-width: 1120px;
    margin-left: auto;
    margin-right: auto;
  }
}

/* Mobile Portrait / Narrow Screens:
   1. Top Header (Brand + Hidden-by-default Directory Drawer)
   2. Immediate Main Content (Overview Hero / Article Title)
   3. Studio Credits (Dr. Y + Hana) at Bottom
   4. Legal Copyright Footer at Very Bottom */
@media (max-width: 1024px) {
  .broadsheet-shell {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  .lateral-rail {
    display: contents;
  }
  .rail-top {
    grid-column: 1;
    grid-row: auto;
    order: 1;
    padding: 22px 22px 18px;
    border-bottom: 1px solid var(--rule-strong);
    background: var(--bg);
  }
  .rail-top .brand-mark {
    padding-right: 142px;
  }
  .rail-top .rail-nav {
    display: none;
    margin-top: 18px;
    padding-top: 8px;
    border-top: 1px solid var(--rule);
  }
  html.mobile-nav-open .rail-top .rail-nav {
    display: flex;
  }
  .top-corner-controls {
    top: 22px;
    right: 22px;
  }
  .rail-toggle-btn .icon-desktop-rail {
    display: none;
  }
  .rail-toggle-btn .icon-mobile-menu {
    display: block;
  }
  html.mobile-nav-open .rail-toggle-btn {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--bg-elevated);
  }
  html.mobile-nav-open .rail-toggle-btn .m-line-1 {
    transform: translateY(5px) rotate(45deg);
  }
  html.mobile-nav-open .rail-toggle-btn .m-line-2 {
    opacity: 0;
  }
  html.mobile-nav-open .rail-toggle-btn .m-line-3 {
    transform: translateY(-5px) rotate(-45deg);
  }
  .broadsheet-main {
    grid-column: 1;
    grid-row: auto;
    order: 2;
  }
  .rail-credits {
    grid-column: 1;
    grid-row: auto;
    order: 3;
    padding: 26px 22px;
    border-top: 1px solid var(--rule-strong);
    background: var(--bg);
  }
  .rail-credits .founder-footnote {
    border-top: none;
    padding-top: 0;
  }
  .sheet-footer {
    grid-column: 1;
    grid-row: auto;
    order: 4;
    border-top: 1px solid var(--rule);
    padding: 18px 22px 28px;
  }
  .swiss-hero .kicker,
  .article-head .article-meta-row {
    padding-right: 0;
  }
  .swiss-reader-grid,
  .svc-grid-2,
  .photo-grid,
  .series-index-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }
  .ledger-row,
  .spec-item,
  .vault-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .swiss-hero,
  .sheet-section,
  .article-wrap {
    padding-left: 22px;
    padding-right: 22px;
  }
}