:root {
  --paper: #FAF6F2;
  --surface: #F0E8E0;
  --surface-elevated: #FFFDFB;
  --surface-deep: #281924;
  --ink: #281924;
  --ink-muted: #5C4654;
  --ink-on-deep: #FAF6F2;
  --copper: #B4533C;
  --copper-dark: #8F3E2B;
  --copper-soft: #F7E8E3;
  --champagne: #C4A484;
  --champagne-soft: #F3EBE2;
  --rule: #DFD3C8;
  --rule-strong: #281924;
  --safe: #275943;
  --safe-bg: #E8F2ED;
  --warn: #8A5311;
  --warn-bg: #FCF3E4;
  --danger: #8E2424;
  --danger-bg: #FBECEC;

  --font-display: 'Bodoni Moda', Georgia, serif;
  --font-sans: 'Montserrat', sans-serif;
  --font-mono: 'Victor Mono', monospace;

  --editorial-width: 76rem;
  --content-width: 49rem;
  --rail-width: 19rem;
  --container-pad: 1.5rem;
}

@media (min-width: 768px) {
  :root {
    --container-pad: 2.25rem;
  }
}

@media (min-width: 1280px) {
  :root {
    --container-pad: 3rem;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--copper-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.16s ease;
}

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

:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--surface-deep);
  color: var(--ink-on-deep);
  padding: 0.75rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.container {
  width: 100%;
  max-width: var(--editorial-width);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* Editorial Masthead */
.site-header {
  border-bottom: 1px solid var(--rule-strong);
  background: var(--paper);
}

.masthead-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.15rem 0.9rem;
  border-bottom: 1px solid var(--rule);
}

.brand-mark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-wordmark {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.8vw, 2.15rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.masthead-edition {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.primary-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1.45rem;
  padding-block: 0.7rem;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-muted);
  padding-block: 0.35rem;
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--ink);
  border-bottom-color: var(--copper);
}

/* Asymmetric Lookbook Magazine Collage Hero */
.lookbook-hero {
  padding-block: 2.25rem 2.75rem;
  border-bottom: 1px solid var(--rule);
}

.lookbook-spread {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  align-items: center;
  gap: 0;
}

.lookbook-plate-wrap {
  position: relative;
  border: 1px solid var(--rule-strong);
  background: var(--surface-deep);
  overflow: hidden;
}

.lookbook-plate-img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.lookbook-plate-caption {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 0.4rem 1.25rem;
  padding: 0.65rem 5rem 0.65rem 1rem;
  background: var(--surface-deep);
  color: var(--champagne);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.editors-note-card {
  position: relative;
  z-index: 2;
  margin-left: -4.25rem;
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  border-left: 4px solid var(--copper);
  padding: 2rem 2.15rem;
}

.editorial-kicker {
  margin: 0 0 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--copper-dark);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.12;
  text-wrap: balance;
}

h1 {
  margin: 0 0 0.9rem;
  font-size: clamp(2rem, 3.8vw, 3.1rem);
  font-weight: 600;
  letter-spacing: -0.028em;
}

h2 {
  margin: 2.35rem 0 0.85rem;
  font-size: clamp(1.5rem, 2.5vw, 2.05rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

h3 {
  margin: 1.5rem 0 0.55rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.hero-dek {
  margin: 0 0 1.25rem;
  font-size: 0.98rem;
  color: var(--ink-muted);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.6rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--rule-strong);
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, transform 0.12s ease;
}

.btn-primary {
  background: var(--surface-deep);
  color: var(--ink-on-deep);
}

.btn-primary:hover {
  background: var(--copper-dark);
  border-color: var(--copper-dark);
  color: var(--ink-on-deep);
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
}

.btn-secondary:hover {
  background: var(--surface);
  color: var(--ink);
}

@media (max-width: 960px) {
  .lookbook-spread {
    grid-template-columns: minmax(0, 1fr);
  }
  .editors-note-card {
    margin-left: 0;
    margin-top: -1.5rem;
    margin-inline: 0.75rem;
    padding: 1.45rem 1.35rem;
  }
}

/* Subpage Editorial Header */
.page-masthead {
  padding-block: 2rem 1.75rem;
  border-bottom: 1px solid var(--rule-strong);
}

.breadcrumb {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.byline-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
}

/* Two-Column Guide & Right Rail */
.editorial-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--rail-width);
  gap: 3rem;
  padding-block: 2.25rem 3.5rem;
  align-items: start;
}

.prose-col {
  min-width: 0;
  max-width: var(--content-width);
}

.prose-col p {
  margin: 0 0 1.1rem;
}

.rail-col {
  position: sticky;
  top: 1.5rem;
  border-top: 2px solid var(--rule-strong);
  padding-top: 1rem;
}

@media (max-width: 1024px) {
  .editorial-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }
  .rail-col {
    position: static;
  }
}

.rail-block {
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule);
}

.rail-heading {
  margin: 0 0 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--copper-dark);
}

.rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.rail-list li {
  margin-bottom: 0.45rem;
  font-size: 0.88rem;
  line-height: 1.45;
}

/* Answer Capsule (Zero Inline Links inside .answer-box / .faq-a) */
.answer-capsule {
  margin: 1.5rem 0 2rem;
  padding: 1.25rem 1.4rem;
  background: var(--surface);
  border-left: 3px solid var(--copper);
}

.capsule-label {
  margin-bottom: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--copper-dark);
}

.answer-box {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
}

.answer-box p {
  margin: 0;
}

/* Interactive Formula & Compatibility Workbench (Zero Native Select) */
.workbench-section {
  padding-block: 2.5rem;
  border-bottom: 1px solid var(--rule);
}

.workbench-slab {
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  padding: 1.75rem;
  margin-block: 1.5rem 2rem;
}

.workbench-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem 1.5rem;
  padding-bottom: 1rem;
  margin-bottom: 1.35rem;
  border-bottom: 1px solid var(--rule);
}

.workbench-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.workbench-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 2rem;
  align-items: start;
}

@media (max-width: 900px) {
  .workbench-slab {
    padding: 1.2rem;
  }
  .workbench-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
  }
}

.control-group {
  margin-bottom: 1.25rem;
}

.control-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
}

.control-val {
  color: var(--copper-dark);
  font-variant-numeric: tabular-nums;
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.pill-btn {
  min-height: 44px;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.14s ease, color 0.14s ease, border-color 0.14s ease;
}

.pill-btn:hover {
  background: var(--champagne-soft);
}

.pill-btn.is-active {
  background: var(--surface-deep);
  color: var(--ink-on-deep);
  border-color: var(--surface-deep);
}

.stepper-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 44px;
  align-items: center;
  border: 1px solid var(--rule-strong);
  background: var(--paper);
}

.stepper-btn {
  min-height: 44px;
  min-width: 44px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
}

.stepper-btn:hover {
  background: var(--champagne-soft);
}

.stepper-display {
  text-align: center;
  padding: 0.5rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-variant-numeric: tabular-nums;
  border-inline: 1px solid var(--rule);
}

.readout-panel {
  background: var(--surface-elevated);
  border: 1px solid var(--rule-strong);
  padding: 1.35rem;
}

.tier-banner {
  padding: 0.75rem 1rem;
  margin-bottom: 1.1rem;
  border-left: 4px solid var(--safe);
  background: var(--safe-bg);
  color: var(--safe);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.tier-banner.is-warn {
  border-left-color: var(--warn);
  background: var(--warn-bg);
  color: var(--warn);
}

.tier-banner.is-danger {
  border-left-color: var(--danger);
  background: var(--danger-bg);
  color: var(--danger);
}

.readout-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 1rem;
}

@media (max-width: 520px) {
  .readout-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.readout-cell {
  border-top: 1px solid var(--rule);
  padding-top: 0.55rem;
}

.readout-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}

.readout-val {
  display: block;
  margin-top: 0.2rem;
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.formula-note {
  margin: 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--rule);
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--ink-muted);
}

/* Booktabs Three-Line Tables (Strictly preserving table-cell display) */
.table-responsive-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 1.5rem 0;
  -webkit-overflow-scrolling: touch;
}

.lookbook-table {
  width: 100%;
  border-collapse: collapse;
  border-top: 2px solid var(--rule-strong);
  border-bottom: 2px solid var(--rule-strong);
  font-size: 0.9rem;
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
}

.lookbook-table thead th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--surface);
  border-bottom: 1.5px solid var(--rule-strong);
  padding: 0.7rem 0.85rem;
}

.lookbook-table tbody td {
  padding: 0.78rem 0.85rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
  color: var(--ink-muted);
}

.lookbook-table tbody td:first-child {
  color: var(--ink);
  font-weight: 600;
}

.lookbook-table tbody tr:last-child td {
  border-bottom: 0;
}

:is(.tone-pill, .risk-badge):not(td):not(th) {
  display: inline-block;
  padding: 0.14rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  color: var(--ink);
}

.tone-pill.is-copper:not(td):not(th) {
  border-color: var(--copper);
  background: var(--copper-soft);
  color: var(--copper-dark);
}

.tone-pill.is-safe:not(td):not(th) {
  border-color: var(--safe);
  background: var(--safe-bg);
  color: var(--safe);
}

/* Custom Morphology SVG Diagrams & Editorial Photographic Plates */
.morphology-figure {
  margin: 1.75rem 0;
  border: 1px solid var(--rule-strong);
  background: var(--surface-elevated);
}

.morphology-svg {
  display: block;
  width: 100%;
  height: auto;
}

.figure-caption {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--rule);
  background: var(--surface);
  font-size: 0.84rem;
  color: var(--ink-muted);
}

.plate-figure {
  margin: 1.75rem 0;
  border: 1px solid var(--rule-strong);
  background: var(--surface-deep);
}

.plate-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.plate-figure.is-square img {
  aspect-ratio: 4 / 3;
}

.plate-caption {
  padding: 0.75rem 1rem;
  background: var(--surface);
  border-top: 1px solid var(--rule-strong);
  font-size: 0.84rem;
  color: var(--ink);
}

/* Editorial Index Strips (Non-Card-Wall) */
.editorial-index {
  padding-block: 2.25rem;
  border-bottom: 1px solid var(--rule);
}

.index-ledger {
  border-top: 2px solid var(--rule-strong);
}

.index-row {
  display: grid;
  grid-template-columns: 9.5rem minmax(0, 1fr) auto;
  gap: 0.75rem 1.5rem;
  align-items: baseline;
  padding-block: 1.05rem;
  border-bottom: 1px solid var(--rule);
}

.index-num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--copper-dark);
}

.index-title {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
}

.index-desc {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

@media (max-width: 760px) {
  .index-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.35rem;
  }
}

/* FAQ & Single-Page Quiet Archive Disclosures */
.faq-list {
  margin: 1.5rem 0;
  border-top: 1px solid var(--rule-strong);
}

.faq-item {
  padding-block: 1rem;
  border-bottom: 1px solid var(--rule);
}

.faq-q {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
}

.faq-a {
  font-size: 0.95rem;
  color: var(--ink-muted);
}

.faq-a p {
  margin: 0;
}

.small {
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.faq-src {
  margin-top: 0.35rem;
}

.archive-ledger {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--rule-strong);
}

.ref-disclosure {
  margin-bottom: 0.85rem;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--champagne);
  background: var(--surface);
  padding: 0.85rem 1.1rem;
}

.ref-disclosure summary {
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
}

.ref-disclosure-body {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--rule);
  font-size: 0.88rem;
  color: var(--ink-muted);
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--copper-dark);
}

/* Clean Three-Column Editorial Footer (Zero Telemetry Noise) */
.site-footer {
  border-top: 2px solid var(--rule-strong);
  background: var(--surface);
  padding-block: 2.5rem 2.25rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--rule);
}

@media (max-width: 820px) {
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
  }
}

.footer-title {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
}

.footer-heading {
  margin: 0 0 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--copper-dark);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-bottom: 0.4rem;
  font-size: 0.88rem;
}

.footer-colophon {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-top: 1.25rem;
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.not-found-wrap {
  padding-block: 4rem;
  max-width: 44rem;
}

@media print {
  .site-header,
  .site-footer,
  .rail-col,
  .btn-primary,
  .btn-secondary {
    display: none;
  }
  body {
    background: #ffffff;
    color: #000000;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto;
    transition: none;
  }
}