/* ==========================================================================
   Peptide Biologix — The Mineral Atlas of Peptide Biology
   External Stylesheet (web/css/atlas.css)
   Palette: Cool Mineral Slate (#EDF1F5), Chalk Surface (#F7F9FC),
            Prussian Cobalt (#163A6C), Ferric Terracotta (#9A3B26)
   Typography: Fraunces (Display), Public Sans (Body/UI), IBM Plex Mono (Notation)
   ========================================================================== */

:root {
  --bg-canvas: #EDF1F5;
  --bg-surface: #F7F9FC;
  --bg-recessed: #E1E7EF;
  --bg-verdict: #E6EEF8;
  --bg-verdict-border: #94B4DA;

  --ink-primary: #121C2B;
  --ink-secondary: #3B4A5E;
  --ink-muted: #3B4A5E;

  --accent-prussian: #163A6C;
  --accent-cobalt: #1D4ED8;
  --accent-terracotta: #9A3B26;
  --accent-terracotta-soft: #F6EAE6;

  --status-pass-bg: #E3F1EC;
  --status-pass-ink: #14533C;
  --status-pass-border: #99CBB7;

  --status-partial-bg: #FEF3C7;
  --status-partial-ink: #78350F;
  --status-partial-border: #F59E0B;

  --status-unverified-bg: #ECEFF4;
  --status-unverified-ink: #3B4A5E;
  --status-unverified-border: #C2CBD8;

  --status-fail-bg: #F9E8E6;
  --status-fail-ink: #88291A;
  --status-fail-border: #E2B1A9;

  --border-hairline: #C8D2DF;
  --border-subtle: #D7E0EB;
  --border-strong: #163A6C;

  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-sans: 'Public Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  --max-width: 1280px;
  --measure: 68ch;
  --radius-sm: 3px;
  --radius-md: 5px;
  --shadow-plate: 0 1px 3px rgba(18, 28, 43, 0.06), 0 1px 2px rgba(18, 28, 43, 0.04);
  --shadow-flyout: 0 14px 32px rgba(18, 28, 43, 0.14), 0 2px 6px rgba(18, 28, 43, 0.08);
}

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

[hidden],
.compound-card[hidden],
.class-chapter[hidden] {
  display: none !important;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-canvas);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  font-feature-settings: "kern" 1, "liga" 1;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent-prussian);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

a:hover,
a:focus-visible {
  color: var(--accent-terracotta);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent-cobalt);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.5rem;
  z-index: 999;
  background: var(--accent-prussian);
  color: #FFFFFF;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

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

/* ==========================================================================
   Typography
   ========================================================================== */

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--ink-primary);
  font-weight: 600;
  margin-top: 0;
}

h1 {
  font-size: clamp(1.65rem, 3vw, 2.55rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 0.45rem;
}

h2 {
  font-size: clamp(1.32rem, 2vw, 1.75rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  margin-top: 2.25rem;
  margin-bottom: 0.8rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--border-hairline);
}

h3 {
  font-size: clamp(1.08rem, 1.35vw, 1.28rem);
  line-height: 1.3;
  margin-top: 1.5rem;
  margin-bottom: 0.55rem;
}

h4 {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink-secondary);
  margin-top: 1.15rem;
  margin-bottom: 0.4rem;
}

p {
  margin-top: 0;
  margin-bottom: 1.05rem;
  max-width: var(--measure);
}

ul,
ol {
  margin-top: 0;
  margin-bottom: 1.15rem;
  padding-left: 1.35rem;
  max-width: var(--measure);
}

li {
  margin-bottom: 0.38rem;
}

li > strong {
  color: var(--ink-primary);
}

code,
pre,
.mono,
.formula,
.sequence-code {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.tabular,
table td,
table th,
.metric-val,
.specimen-dl dd {
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   Site Masthead & Navigation (Unified Contract Across All 43 Pages)
   ========================================================================== */

.site-header {
  background-color: var(--bg-surface);
  border-bottom: 2px solid var(--border-strong);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.45rem clamp(1rem, 3.5vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.1rem;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink-primary);
  min-height: 44px;
}

.site-brand:hover {
  color: var(--accent-prussian);
}

.brand-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.brand-text-group {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.16rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--ink-primary);
}

.brand-subtitle {
  font-family: var(--font-sans);
  font-size: 0.74rem;
  color: var(--ink-secondary);
  letter-spacing: 0.01em;
  line-height: 1.2;
}

.mobile-nav-toggle {
  display: none;
  min-height: 44px;
  min-width: 44px;
  background: var(--bg-recessed);
  border: 1px solid var(--border-hairline);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.site-nav,
.primary-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.site-nav > a,
.primary-nav > a,
.nav-dropdown-toggle {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-primary);
  text-decoration: none;
  padding: 0.45rem 0.25rem;
  min-height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav > a:hover,
.site-nav > a[aria-current="page"],
.primary-nav > a:hover,
.primary-nav > a[aria-current="page"],
.nav-dropdown-toggle:hover,
.nav-dropdown-toggle[aria-expanded="true"] {
  color: var(--accent-terracotta);
}

.nav-chevron {
  width: 10px;
  height: 10px;
  transition: transform 0.15s ease;
}

.nav-dropdown.is-open .nav-chevron {
  transform: rotate(180deg);
}

.nav-dropdown {
  position: relative;
}

.nav-flyout,
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.25rem);
  right: -10rem;
  width: min(860px, 92vw);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-top: 3px solid var(--accent-prussian);
  box-shadow: var(--shadow-flyout);
  padding: 1.25rem 1.4rem;
  border-radius: var(--radius-sm);
  z-index: 200;
}

.nav-dropdown.is-open .nav-flyout,
.nav-dropdown.is-open .nav-dropdown-menu {
  display: block;
}

@media (hover: hover) and (min-width: 981px) {
  .nav-dropdown:hover:not(.is-escape-closed) .nav-flyout {
    display: block;
  }
  .nav-dropdown:hover:not(.is-escape-closed) .nav-chevron {
    transform: rotate(180deg);
  }
}

.flyout-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
}

.flyout-col h4,
.flyout-group-label {
  font-family: var(--font-display);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--accent-terracotta);
  margin: 0.7rem 0 0.3rem 0;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--border-subtle);
}

.flyout-col h4:first-child,
.flyout-group-label:first-child {
  margin-top: 0;
}

.flyout-col a {
  display: flex;
  align-items: center;
  min-height: 44px;
  font-size: 0.83rem;
  color: var(--ink-secondary);
  text-decoration: none;
  padding: 0.3rem 0.2rem;
  margin-bottom: 0.15rem;
}

.flyout-col a:hover {
  color: var(--accent-prussian);
  text-decoration: underline;
}

/* ==========================================================================
   Folio Bar & Main Container
   ========================================================================== */

.folio-bar {
  background-color: var(--bg-recessed);
  border-bottom: 1px solid var(--border-hairline);
  font-size: 0.81rem;
  color: var(--ink-secondary);
}

.folio-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.1rem clamp(1rem, 3.5vw, 2.5rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.folio-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.folio-breadcrumb a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.2rem 0.25rem;
  color: var(--ink-secondary);
  text-decoration: none;
}

.folio-breadcrumb a:hover {
  color: var(--accent-prussian);
  text-decoration: underline;
}

.folio-sep {
  margin: 0 0.35rem;
  color: var(--ink-secondary);
}

.folio-class {
  font-weight: 600;
  color: var(--accent-terracotta);
}

.main-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem clamp(1rem, 3.5vw, 2.5rem) 3.5rem;
}

/* ==========================================================================
   Hero Deck & First-Screen Oath Feature (Fits <844px at 390px & <900px at 1440px)
   ========================================================================== */

.hero-deck,
.hero-deck-single {
  display: block;
  padding-bottom: 1.15rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--border-strong);
}

.page-title-block {
  max-width: 100%;
}

.class-kicker {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-terracotta);
  margin-bottom: 0.25rem;
}

.lead-summary {
  font-size: clamp(0.96rem, 1.15vw, 1.06rem);
  line-height: 1.5;
  color: var(--ink-secondary);
  margin-bottom: 0.7rem;
  max-width: var(--measure);
}

/* Compact First-Screen Oath Recommendation Panel */
.oath-verdict-panel,
.oath-compact-feature {
  background-color: var(--bg-verdict);
  border: 1px solid var(--bg-verdict-border);
  border-left: 4px solid var(--accent-prussian);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin: 0.55rem 0 0.85rem 0;
  box-shadow: var(--shadow-plate);
  max-width: 920px;
}

.oath-verdict-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.oath-verdict-kicker,
.oath-verdict-title {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--ink-primary);
  margin: 0;
  line-height: 1.25;
}

.oath-verdict-grade {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--status-pass-ink);
  background-color: var(--status-pass-bg);
  border: 1px solid var(--status-pass-border);
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-sm);
}

.oath-verdict-copy {
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--ink-secondary);
  margin: 0 0 0.55rem 0;
  max-width: var(--measure);
}

.oath-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

.btn-oath-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  background-color: var(--accent-prussian);
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.5rem 0.95rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent-prussian);
  transition: background-color 0.15s ease;
}

.btn-oath-primary:hover,
.btn-oath-primary:focus-visible {
  background-color: #0E274B;
  color: #FFFFFF;
}

.btn-oath-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  background-color: var(--bg-surface);
  color: var(--accent-prussian);
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent-prussian);
}

.btn-oath-secondary:hover,
.btn-oath-secondary:focus-visible {
  background-color: var(--bg-recessed);
  color: var(--ink-primary);
}

/* Lower-page / Secondary Oath Details Strip */
.oath-details-box {
  background-color: var(--bg-verdict);
  border: 1px solid var(--bg-verdict-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.1rem;
  margin: 1rem 0 1.35rem 0;
}

.oath-metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.65rem;
  margin-bottom: 0.65rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
}

.oath-metric {
  display: flex;
  flex-direction: column;
}

.oath-metric-val {
  font-family: var(--font-display);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--ink-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.oath-metric-lbl {
  font-size: 0.76rem;
  color: var(--ink-secondary);
  line-height: 1.3;
}

.oath-Note-line,
.oath-Note {
  font-size: 0.82rem;
  color: var(--ink-secondary);
  margin: 0.45rem 0 0 0;
  line-height: 1.45;
  max-width: var(--measure);
}

.sequence-ribbon {
  background-color: var(--bg-recessed);
  border: 1px solid var(--border-hairline);
  border-left: 3px solid var(--accent-prussian);
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  margin-top: 0.65rem;
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.sequence-ribbon + .sequence-ribbon {
  margin-top: 0.5rem;
}

.sequence-label,
.ribbon-label,
.seq-label,
.sequence-ribbon .sequence-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-secondary);
  margin-bottom: 0.2rem;
}

.sequence-code,
.ribbon-code,
.sequence-ribbon code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--ink-primary);
  overflow-wrap: anywhere;
  word-break: break-word;
  white-space: normal;
  line-height: 1.45;
}

/* ==========================================================================
   Atlas Two-Column Monograph Layout
   ========================================================================== */

.atlas-grid,
.monograph-layout {
  display: grid;
  grid-template-columns: minmax(0, 310px) minmax(0, 1fr);
  gap: 2.15rem;
  align-items: start;
}

.specimen-sidebar {
  position: sticky;
  top: 4.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  min-width: 0;
  max-width: 100%;
}

.specimen-card,
.specimen-card-body {
  min-width: 0;
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.specimen-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-top: 2px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow-plate);
}

.specimen-header,
.specimen-card-header {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  margin-bottom: 0.65rem;
  min-width: 0;
  max-width: 100%;
}

.specimen-class-badge,
.specimen-class-tag,
.specimen-class,
.specimen-id {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-terracotta);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.specimen-synonyms,
.specimen-Sub {
  font-size: 0.8rem;
  color: var(--ink-secondary);
  margin: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.specimen-card h2,
.specimen-card h3 {
  font-family: var(--font-display);
  font-size: 1.04rem;
  margin: 0 0 0.45rem 0;
  padding: 0 0 0.4rem 0;
  border-top: none;
  border-bottom: 1px solid var(--border-hairline);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.specimen-dl {
  margin: 0;
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  row-gap: 0.48rem;
  column-gap: 0.6rem;
  font-size: 0.84rem;
  width: 100%;
  max-width: 100%;
}

.specimen-dl dt {
  color: var(--ink-secondary);
  font-weight: 600;
  min-width: 0;
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.specimen-dl dd {
  margin: 0;
  color: var(--ink-primary);
  font-weight: 500;
  min-width: 0;
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.specimen-dl dd *,
.seq-box {
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
  white-space: normal;
}

/* Full-Measure Regulatory Callout Inside .monograph-body */
.fda-regulatory-box {
  background-color: var(--bg-recessed);
  border: 1px solid var(--border-hairline);
  border-left: 3px solid var(--accent-terracotta);
  padding: 0.95rem 1.15rem;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ink-secondary);
  margin: 1.15rem 0;
  max-width: var(--measure);
}

.fda-regulatory-box strong {
  color: var(--ink-primary);
}

.fda-regulatory-box p {
  margin: 0.25rem 0 0 0;
  max-width: var(--measure);
}

.specimen-plate {
  margin: 1.25rem 0;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  padding: 0.65rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-plate);
}

.specimen-sidebar .specimen-plate {
  margin: 0;
}

.specimen-plate img {
  width: 100%;
  height: auto;
  border-radius: 2px;
  border: 1px solid var(--border-subtle);
}

.plate-caption {
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--ink-secondary);
  margin-top: 0.5rem;
  max-width: var(--measure);
}

/* ==========================================================================
   Monograph Body & Data Tables
   ========================================================================== */

.monograph-body {
  min-width: 0;
  max-width: 100%;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-top: 2px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: clamp(1.25rem, 3vw, 2.4rem);
  box-shadow: var(--shadow-plate);
  overflow-wrap: break-word;
}

.monograph-body > section:first-of-type h2:first-child,
.monograph-body > .content-section:first-of-type h2:first-child,
.monograph-body > .spec-sheet > h2:first-child,
.monograph-body > h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.table-scroll,
.table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  margin: 1.15rem 0 1.55rem;
}

table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  margin: 1.1rem 0 1.55rem;
  font-size: 0.88rem;
  line-height: 1.45;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
}

caption {
  text-align: left;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-primary);
  margin-bottom: 0.45rem;
}

th,
td {
  padding: 0.6rem 0.78rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  min-width: 0;
  overflow-wrap: break-word;
  word-break: normal;
}

td:not(:first-child),
td code,
th code,
td .mono,
td .formula,
td .seq-box {
  overflow-wrap: anywhere;
  word-break: break-word;
  white-space: normal;
}

th:last-child,
td:last-child {
  border-right: none;
}

th {
  background-color: var(--bg-recessed);
  color: var(--ink-primary);
  font-weight: 600;
  border-bottom: 1px solid var(--border-hairline);
}

tr:nth-child(even) td {
  background-color: #F2F6FA;
}

/* Callout & Citation Boxes */
.key-point,
.research-note,
.info-box,
.structure-box,
.note {
  background-color: var(--bg-recessed);
  border: 1px solid var(--border-hairline);
  border-left: 3px solid var(--accent-prussian);
  padding: 0.95rem 1.15rem;
  border-radius: var(--radius-sm);
  margin: 1.2rem 0;
  font-size: 0.92rem;
  max-width: var(--measure);
}

.warning-box,
.disclaimer {
  background-color: var(--accent-terracotta-soft);
  border: 1px solid var(--status-fail-border);
  border-left: 3px solid var(--accent-terracotta);
  padding: 0.95rem 1.15rem;
  border-radius: var(--radius-sm);
  margin: 1.2rem 0;
  font-size: 0.9rem;
  color: var(--ink-primary);
  max-width: var(--measure);
}

.citation,
.reference {
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  padding: 0.85rem 1.05rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
  font-size: 0.88rem;
  line-height: 1.55;
  max-width: var(--measure);
}

.reference p,
.citation p,
.key-point p,
.warning-box p,
.note p {
  max-width: var(--measure);
  margin-bottom: 0.5rem;
}

.reference p:last-child,
.citation p:last-child,
.key-point p:last-child,
.warning-box p:last-child,
.note p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Index & Catalog Explorer (2-Column Desktop Grid for 60-75ch Measure)
   ========================================================================== */

.index-figure-band {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.explorer-bar {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-top: 2px solid var(--border-strong);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.search-field-wrap {
  flex: 1 1 280px;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.search-input {
  width: 100%;
  min-height: 44px;
  padding: 0.55rem 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--ink-primary);
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.filter-btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-hairline);
  color: var(--ink-secondary);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-btn:hover,
.filter-btn.is-active {
  background-color: var(--accent-prussian);
  border-color: var(--accent-prussian);
  color: #FFFFFF;
}

.class-chapter {
  margin-bottom: 2.75rem;
}

.class-chapter-header {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 1.5rem;
  align-items: center;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-top: 2px solid var(--border-strong);
  padding: 1.15rem 1.35rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}

.class-chapter-header h2 {
  margin: 0 0 0.35rem 0;
  padding: 0;
  border: none;
}

.class-chapter-header p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--ink-secondary);
  max-width: var(--measure);
}

.class-chapter-thumb {
  width: 100%;
  height: auto;
  border-radius: 2px;
  border: 1px solid var(--border-subtle);
}

.compound-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.15rem;
}

.compound-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 1.15rem 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-plate);
  transition: border-color 0.15s ease;
}

.compound-card:hover {
  border-color: var(--accent-prussian);
}

.compound-card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.compound-card h3 {
  margin: 0;
  font-size: 1.18rem;
}

.compound-card h3 a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.2rem 0;
  text-decoration: none;
  color: var(--ink-primary);
}

.compound-card h3 a:hover {
  color: var(--accent-prussian);
  text-decoration: underline;
}

.compound-mw {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-secondary);
  font-variant-numeric: tabular-nums;
}

.compound-syn {
  font-size: 0.82rem;
  color: var(--ink-secondary);
  margin-bottom: 0.45rem;
}

.compound-desc {
  font-size: 0.94rem;
  color: var(--ink-secondary);
  line-height: 1.55;
  margin-bottom: 0.8rem;
  max-width: 68ch;
}

.compound-meta-row {
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.55rem;
  font-size: 0.8rem;
  color: var(--ink-secondary);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.4rem;
}

.compound-meta-row a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.2rem 0.25rem;
}

/* ==========================================================================
   Vendor Analytical Comparison Matrix
   ========================================================================== */

.status-pill,
.status-badge {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.35;
  padding: 0.18rem 0.5rem;
  border-radius: var(--radius-sm);
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
  max-width: 100%;
}

.status-pass,
.status-approved {
  background-color: var(--status-pass-bg);
  color: var(--status-pass-ink);
  border: 1px solid var(--status-pass-border);
}

.status-partial,
.status-cat2,
.status-discontinued {
  background-color: var(--status-partial-bg);
  color: var(--status-partial-ink);
  border: 1px solid var(--status-partial-border);
}

.status-unverified,
.status-investigational,
.status-withdrawn {
  background-color: var(--status-unverified-bg);
  color: var(--status-unverified-ink);
  border: 1px solid var(--status-unverified-border);
}

.status-fail {
  background-color: var(--status-fail-bg);
  color: var(--status-fail-ink);
  border: 1px solid var(--status-fail-border);
}

.vendor-profile-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-top: 2px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 1.35rem 1.5rem;
  margin-bottom: 1.35rem;
  box-shadow: var(--shadow-plate);
}

.vendor-profile-oath {
  background-color: var(--bg-verdict);
  border-color: var(--bg-verdict-border);
  border-top: 3px solid var(--accent-prussian);
}

.vendor-profile-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border-hairline);
}

.vendor-profile-header h3 {
  margin: 0;
  font-size: 1.3rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background-color: var(--bg-surface);
  border-top: 2px solid var(--border-strong);
  margin-top: 3.5rem;
  color: var(--ink-secondary);
  font-size: 0.86rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem clamp(1rem, 3.5vw, 2.5rem);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-hairline);
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--ink-primary);
  margin-top: 0;
  margin-bottom: 0.65rem;
}

.footer-col a,
.toc-list a,
.sitemap-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink-secondary);
  text-decoration: none;
  padding: 0.35rem 0;
  margin-bottom: 0.15rem;
}

.footer-col a:hover,
.toc-list a:hover,
.sitemap-list a:hover {
  color: var(--accent-prussian);
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--ink-secondary);
}

/* ==========================================================================
   Responsive Design (Tablet & Mobile 390x844 Discipline)
   ========================================================================== */

@media (max-width: 980px) {
  .atlas-grid,
  .monograph-layout,
  .index-figure-band,
  .class-chapter-header,
  .compound-cards-grid,
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .specimen-sidebar {
    position: static;
  }

  .nav-flyout,
  .nav-dropdown-menu {
    position: static;
    width: 100%;
    box-shadow: none;
    margin-top: 0.4rem;
  }

  .flyout-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .flyout-col a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }
}

@media (max-width: 680px) {
  .header-inner {
    padding: 0.35rem 0.85rem;
    flex-wrap: wrap;
  }

  .brand-title {
    font-size: 1.05rem;
  }

  .brand-subtitle {
    display: none;
  }

  .mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
  }

  .site-nav,
  .primary-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.3rem;
    padding-top: 0.55rem;
    border-top: 1px solid var(--border-hairline);
  }

  .site-nav.is-open,
  .primary-nav.is-open {
    display: flex;
  }

  .site-nav > a,
  .primary-nav > a,
  .nav-dropdown-toggle {
    width: 100%;
    justify-content: space-between;
    padding: 0.55rem 0.4rem;
  }

  .flyout-grid {
    grid-template-columns: 1fr;
  }

  .folio-inner {
    padding: 0.28rem 0.85rem;
    font-size: 0.75rem;
  }

  .main-container {
    padding: 0.6rem 0.85rem 2.25rem;
  }

  .hero-deck,
  .hero-deck-single {
    padding-bottom: 0.8rem;
    margin-bottom: 0.9rem;
  }

  h1 {
    font-size: 1.42rem;
    line-height: 1.14;
    margin-bottom: 0.3rem;
  }

  .lead-summary {
    font-size: 0.88rem;
    line-height: 1.4;
    margin-bottom: 0.45rem;
  }

  .oath-verdict-panel,
  .oath-compact-feature {
    padding: 0.6rem 0.75rem;
    margin: 0.4rem 0 0.65rem 0;
  }

  .oath-verdict-kicker,
  .oath-verdict-title {
    font-size: 0.95rem;
  }

  .oath-verdict-copy {
    font-size: 0.81rem;
    line-height: 1.38;
    margin-bottom: 0.45rem;
  }

  .btn-oath-primary,
  .btn-oath-secondary {
    min-height: 44px;
    font-size: 0.82rem;
    padding: 0.45rem 0.75rem;
  }
}