/* Ampersand Skin Lab — Editorial Botanical & Barrier Formulation Stylesheet */
:root {
  --bg-canvas: #F5F0E8;
  --bg-surface: #EAE2D6;
  --bg-elevated: #FBF8F3;
  --ink: #261E19;
  --ink-muted: #594C43;
  --accent-amber: #9C5A25;
  --accent-sage: #4A6655;
  --accent-terracotta: #8C3B2B;
  --rule: #D6CCBE;
  --rule-strong: #261E19;
  --editorial-width: 76rem;
  --prose-width: 49rem;
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Raleway', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Anonymous Pro', ui-monospace, monospace;
}

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

html {
  background: var(--bg-canvas);
  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;
  background: var(--bg-canvas);
  color: var(--ink);
  overflow-x: hidden;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--bg-canvas);
  padding: 0.65rem 1.1rem;
  z-index: 100;
  font-size: 0.85rem;
  text-decoration: none;
}
.skip-link:focus { left: 1rem; top: 1rem; }

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

.wrap {
  width: 100%;
  max-width: var(--editorial-width);
  margin: 0 auto;
  padding-inline: 2.25rem;
}

/* Header & Navigation */
.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--bg-canvas);
}

.header-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.25rem 0;
  flex-wrap: wrap;
}

.brand-wordmark {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  line-height: 1;
}

.brand-sub {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-left: 0.6rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 1.75rem;
  align-items: center;
}

.site-nav a {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-muted);
  padding-bottom: 0.2rem;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent-amber);
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  font-weight: 500;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.35rem, 4.1vw, 3.65rem);
  line-height: 1.05;
  letter-spacing: -0.028em;
  margin: 0 0 1.1rem;
}

h2 {
  font-size: clamp(1.75rem, 2.7vw, 2.35rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 2.5rem 0 0.9rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}

h3 {
  font-size: 1.38rem;
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 1.6rem 0 0.6rem;
}

p {
  margin: 0 0 1.15rem;
  max-width: 66ch;
}

a {
  color: var(--accent-amber);
  text-underline-offset: 3px;
}

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

.mono-metric {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.86rem;
}

.kicker-line {
  font-size: 0.76rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--accent-amber);
  margin: 0 0 0.7rem;
}

.lead-copy {
  font-size: 1.08rem;
  color: var(--ink-muted);
  line-height: 1.65;
  max-width: 56ch;
}

/* Editorial Split Hero (Homepage) */
.atelier-split {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  border-bottom: 1px solid var(--rule-strong);
  align-items: stretch;
}

.atelier-media {
  background: var(--bg-surface);
  overflow: hidden;
}

.atelier-media img {
  width: 100%;
  height: 100%;
  min-height: 460px;
  max-height: 640px;
  object-fit: cover;
  display: block;
}

.atelier-copy {
  padding: 3.25rem 0 3.25rem 3.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 2rem;
}

.atelier-index {
  border-top: 1px solid var(--rule);
  margin-top: 0.5rem;
}

.atelier-index a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: var(--ink);
  font-weight: 500;
  transition: padding-left 0.18s ease, color 0.18s ease;
}

.atelier-index a:hover {
  color: var(--accent-amber);
  padding-left: 0.35rem;
}

.atelier-index .mono-metric {
  color: var(--accent-amber);
  flex-shrink: 0;
}

/* Page Header & Carrier Grids */
.page-banner {
  padding: 2.75rem 0 2rem;
  border-bottom: 1px solid var(--rule-strong);
}

.page-banner-split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.75rem;
  align-items: center;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--rule-strong);
}

.page-banner-plate img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  display: block;
}

.guide-layout {
  display: grid;
  grid-template-columns: minmax(0, var(--prose-width)) minmax(220px, 1fr);
  gap: 3.25rem;
  padding: 2.5rem 0 3.5rem;
  align-items: start;
}

.guide-prose {
  min-width: 0;
}

.guide-rail {
  position: sticky;
  top: 1.75rem;
  border-left: 1px solid var(--rule);
  padding-left: 1.5rem;
  font-size: 0.9rem;
}

.guide-rail h2,
.guide-rail h3 {
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  border-top: 0;
  padding-top: 0;
  margin: 0 0 0.75rem;
}

.rail-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.75rem;
}

.rail-list li {
  border-bottom: 1px solid var(--rule);
  padding: 0.45rem 0;
}

.rail-list a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.88rem;
}

.rail-list a:hover { color: var(--accent-amber); }

/* GEO Link-Free Answer Capsule */
.answer-capsule {
  margin: 2rem 0;
  background: var(--bg-elevated);
  border-left: 3px solid var(--accent-amber);
  padding: 1.25rem 1.5rem;
}

.capsule-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent-amber);
  margin-bottom: 0.45rem;
  font-weight: 700;
}

.answer-box {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  max-width: 66ch;
}

.answer-box p { margin: 0; }

/* Interactive Active Layering Workbench (Zero native <select>) */
.layer-lab {
  background: var(--bg-surface);
  border-top: 2px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule-strong);
  padding: 2rem;
  margin: 2.25rem 0;
}

.lab-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.25rem;
  align-items: start;
}

.control-group {
  margin-bottom: 1.35rem;
}

.control-label {
  display: block;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.6rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip-btn:not(td):not(th) {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 44px;
  padding: 0.5rem 0.9rem;
  background: var(--bg-elevated);
  border: 1px solid var(--ink-muted);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.chip-btn:hover {
  border-color: var(--ink);
  background: var(--bg-canvas);
}

.chip-btn[aria-pressed="true"] {
  background: var(--ink);
  color: var(--bg-canvas);
  border-color: var(--ink);
}

.verdict-card {
  background: var(--bg-elevated);
  border-left: 4px solid var(--accent-sage);
  padding: 1.4rem 1.5rem;
}

.verdict-card[data-state="stagger"] { border-left-color: var(--accent-amber); }
.verdict-card[data-state="conflict"] { border-left-color: var(--accent-terracotta); }

.verdict-status {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent-sage);
  margin-bottom: 0.45rem;
}

.verdict-card[data-state="stagger"] .verdict-status { color: var(--accent-amber); }
.verdict-card[data-state="conflict"] .verdict-status { color: var(--accent-terracotta); }

.verdict-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.65rem;
  line-height: 1.2;
}

.verdict-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  border-top: 1px solid var(--rule);
  padding-top: 0.9rem;
  margin-top: 1rem;
}

.metric-cell small {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
}

.metric-cell span {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--ink);
}

/* Booktabs Three-Line Tables (Zero td/th flow destruction) */
.table-responsive-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 1.75rem 0;
  -webkit-overflow-scrolling: touch;
}

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;
}

thead th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--bg-surface);
  border-bottom: 1.5px solid var(--rule-strong);
  padding: 0.72rem 0.9rem;
}

tbody td {
  padding: 0.78rem 0.9rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
  color: var(--ink);
}

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

.badge-state:not(td):not(th) {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  background: var(--bg-surface);
  border: 1px solid var(--rule);
  color: var(--ink);
}

.badge-state.is-sage:not(td):not(th) {
  border-color: var(--accent-sage);
  color: var(--accent-sage);
}

.badge-state.is-amber:not(td):not(th) {
  border-color: var(--accent-amber);
  color: var(--accent-amber);
}

/* SVG Data Diagrams & Editorial Plates */
.diagram-frame {
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--bg-elevated);
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule);
}

.diagram-caption {
  font-size: 0.84rem;
  color: var(--ink-muted);
  margin: 0.75rem 0 0;
}

.editorial-split-2col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.25rem;
  margin: 2rem 0;
  align-items: start;
}

.editorial-note-block {
  border-top: 1px solid var(--rule-strong);
  padding-top: 1rem;
}

/* Historical Archive & Silent Disclosures */
.archive-ledger {
  margin-top: 2.75rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--rule-strong);
}

.archive-item {
  border-left: 3px solid var(--accent-amber);
  background: var(--bg-elevated);
  padding: 1.15rem 1.4rem;
  margin: 1.15rem 0;
}

.archive-item h3 {
  margin: 0 0 0.45rem;
  font-size: 1.25rem;
}

.archive-meta {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
  margin-bottom: 0.45rem;
}

.ref-disclosure {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 0.85rem 0;
  margin: 1.25rem 0;
}

.ref-disclosure summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--ink);
  list-style: none;
}

.ref-disclosure summary::before {
  content: "+ ";
  font-family: var(--font-mono);
  color: var(--accent-amber);
}

.ref-disclosure[open] summary::before { content: "- "; }

.ref-disclosure-body {
  padding-top: 0.85rem;
  font-size: 0.92rem;
  color: var(--ink-muted);
}

/* FAQ List */
.faq-list {
  margin: 1.5rem 0;
}

.faq-entry {
  border-bottom: 1px solid var(--rule);
  padding: 1.15rem 0;
}

.faq-q {
  font-family: var(--font-display);
  font-size: 1.32rem;
  font-weight: 600;
  margin: 0 0 0.45rem;
}

.faq-a {
  color: var(--ink-muted);
  font-size: 0.96rem;
  max-width: 66ch;
}

.faq-src {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin: 0.5rem 0 0;
}

/* Clean 3-Column Editorial Footer */
.site-footer {
  border-top: 1px solid var(--rule-strong);
  background: var(--bg-surface);
  padding: 2.75rem 0;
  margin-top: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 2.5rem;
}

.footer-col h3 {
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0 0 0.85rem;
}

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

.footer-links li { margin-bottom: 0.45rem; }

.footer-links a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.9rem;
}

.footer-links a:hover { color: var(--accent-amber); }

.footer-base {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--ink-muted);
}

/* Responsive Breakpoints */
@media (max-width: 960px) {
  .atelier-split,
  .page-banner-split,
  .guide-layout,
  .lab-grid,
  .editorial-split-2col,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .atelier-copy { padding: 2rem 0 1.5rem; }
  .guide-rail {
    position: static;
    border-left: 0;
    border-top: 1px solid var(--rule);
    padding-left: 0;
    padding-top: 1.5rem;
  }
}

@media (max-width: 600px) {
  .wrap { padding-inline: 1.25rem; }
  .layer-lab { padding: 1.25rem; }
  .verdict-metrics { grid-template-columns: 1fr; }
}

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

@media print {
  .site-header, .site-nav, .guide-rail, .skip-link { display: none; }
  body { background: #FFFFFF; color: #000000; }
  .wrap { max-width: 100%; padding: 0; }
}