/* ==========================================================================
   EXPEDITION ECUADOR — ARCHIVAL FIELD JOURNAL STYLESHEET
   Palette: Parchment #F6F1E7, Ink #1C1917, Forest #1E5E3A, Rust #C93B1E, Basalt #181615
   Zero external fonts, zero gradients, zero SaaS cards, 320px/390px overflow-safe.
   ========================================================================== */

:root {
  --bg-parchment: #F6F1E7;
  --bg-specimen: #EDE4D3;
  --bg-paper-bright: #FBF8F2;
  --bg-basalt: #181615;
  --bg-basalt-elevated: #23201E;
  --bg-basalt-panel: #2B2724;

  --ink: #1C1917;
  --ink-secondary: #463F38;
  --ink-muted: #5C5349;
  --ink-on-dark: #F6F1E7;
  --ink-muted-dark: #C8BEB0;

  --forest: #1E5E3A;
  --forest-deep: #144429;
  --forest-tint: #E3EFE8;

  --rust: #C93B1E;
  --rust-deep: #992811;
  --rust-tint: #F9E6E2;

  --amber-dark: #F59E0B;
  --ocean-ink: #0D5C75;
  --ocean-bg: #DCE8EC;

  --rule-hairline: #C8B99E;
  --rule-strong: #1C1917;
  --rule-dark: #443E38;

  --font-serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, "Times New Roman", serif;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  --container-max: 1260px;
}

/* Reset & Box Sizing */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  background-color: var(--bg-parchment);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.94rem + 0.35vw, 1.125rem);
  line-height: 1.62;
  background-color: var(--bg-parchment);
  color: var(--ink);
  overflow-x: hidden;
  overflow-wrap: break-word;
}

@media (min-width: 960px) {
  body {
    font-size: 17px;
  }
}

details:not(.bilingual-drawer) {
  margin-top: 8px;
  font-size: 0.92rem;
  color: var(--ink-secondary);
}

details:not(.bilingual-drawer) summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ocean-ink);
  padding: 4px 0;
  user-select: none;
}

.section-basalt details:not(.bilingual-drawer) summary {
  color: var(--amber-dark);
}

details:not(.bilingual-drawer)[open] summary {
  margin-bottom: 6px;
}

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

/* Focus Visibility (WCAG 2.2 AA/AAA) */
:focus-visible {
  outline: 3px solid var(--ocean-ink);
  outline-offset: 2px;
}

.section-basalt :focus-visible,
.site-footer :focus-visible {
  outline: 3px solid var(--amber-dark);
  outline-offset: 2px;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 12px;
  z-index: 9999;
  padding: 12px 18px;
  background-color: var(--ink);
  color: var(--bg-parchment);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  text-decoration: none;
  border: 2px solid var(--rust);
}

.skip-link:focus {
  top: 12px;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(12px, 3.5vw, 36px);
}

/* Typography Utilities */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  color: inherit;
  margin-top: 0;
  letter-spacing: -0.015em;
}

p {
  margin-top: 0;
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--ocean-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--rust-deep);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 2px 5px;
  background-color: rgba(28, 25, 23, 0.08);
  border: 1px solid var(--rule-hairline);
}

.section-basalt code {
  background-color: rgba(246, 241, 231, 0.1);
  border-color: var(--rule-dark);
}

.mono-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  line-height: 1.35;
  color: var(--ink-secondary);
}

.tag-rust {
  color: var(--rust-deep);
  background-color: var(--rust-tint);
  padding: 3px 8px;
  border: 1px solid var(--rust);
}

.tag-forest {
  color: var(--forest-deep);
  background-color: var(--forest-tint);
  padding: 3px 8px;
  border: 1px solid var(--forest);
}

.tag-amber-dark {
  color: #FDE68A;
  background-color: #362A14;
  padding: 3px 8px;
  border: 1px solid var(--amber-dark);
}

.tag-rust-dark {
  color: #FECACA;
  background-color: #451A14;
  padding: 3px 8px;
  border: 1px solid #F87171;
}

.tag-extinct-dark {
  color: #F5F5F4;
  background-color: #292524;
  padding: 3px 8px;
  border: 1.5px solid #A8A29E;
}

/* ==========================================================================
   MASTHEAD & NAVIGATION
   ========================================================================== */
.masthead {
  border-bottom: 2px solid var(--rule-strong);
  background-color: var(--bg-parchment);
  position: sticky;
  top: 0;
  z-index: 200;
}

.masthead-meta-bar {
  border-bottom: 1px solid var(--rule-hairline);
  background-color: var(--bg-specimen);
  padding-block: 4px;
}

.masthead-meta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
}

.masthead-nav-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  padding-block: 10px;
}

.brand-lockup {
  display: flex;
  flex-direction: column;
}

.brand-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--ink-secondary);
  text-transform: uppercase;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink);
}

.primary-nav {
  flex: 1 1 auto;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 44px;
  padding: 6px 10px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid transparent;
}

.nav-link:hover {
  background-color: var(--bg-specimen);
  border-color: var(--rule-hairline);
  color: var(--ink);
}

.nav-link-accent {
  background-color: var(--forest);
  color: var(--bg-parchment);
  border-color: var(--forest-deep);
}

.nav-link-accent:hover {
  background-color: var(--forest-deep);
  color: var(--bg-parchment);
}

.nav-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--rust);
}

.nav-link-accent .nav-num {
  color: #A7F3D0;
}

/* ==========================================================================
   BUTTONS & CONTROLS (Minimum 44px Touch Targets)
   ========================================================================== */
button,
.btn-primary,
.btn-secondary,
.btn-utility,
.btn-utility-dark,
.btn-region,
.btn-stage-ctrl,
.btn-volcano-part,
.btn-hypothesis,
.select-input {
  font-family: var(--font-sans);
  font-size: 0.925rem;
  min-height: 44px;
  cursor: pointer;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  font-weight: 700;
  text-decoration: none;
  border: 1.5px solid var(--rule-strong);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background-color: var(--rust);
  color: #FFFFFF;
  border-color: var(--rust-deep);
}

.btn-primary:hover {
  background-color: var(--rust-deep);
  color: #FFFFFF;
}

.btn-secondary {
  background-color: var(--bg-paper-bright);
  color: var(--ink);
}

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

.btn-utility {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background-color: var(--bg-paper-bright);
  color: var(--ink);
  border: 1px solid var(--rule-strong);
  font-weight: 600;
  font-size: 0.84rem;
}

.btn-utility:hover,
.btn-utility.is-active {
  background-color: var(--ink);
  color: var(--bg-parchment);
}

.btn-utility-indicator {
  display: inline-block;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background-color: var(--forest);
  color: #FFFFFF;
}

.btn-utility-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  background-color: var(--bg-basalt-panel);
  color: var(--ink-on-dark);
  border: 1px solid var(--amber-dark);
  font-weight: 600;
  font-size: 0.85rem;
}

.btn-utility-dark:hover {
  background-color: var(--amber-dark);
  color: var(--ink);
}

/* ==========================================================================
   HERO PLATE (ASYMMETRICAL DOCUMENTARY SPLIT)
   ========================================================================== */
.hero-plate {
  padding-block: clamp(24px, 4vw, 52px);
  border-bottom: 2px solid var(--rule-strong);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: 5fr 7fr;
    gap: 36px;
  }
}

.editorial-kicker-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.hero-headline {
  font-size: clamp(2rem, 1.45rem + 2.8vw, 3.45rem);
  line-height: 1.06;
  margin-bottom: 18px;
  color: var(--ink);
}

.hero-lead {
  font-size: clamp(1.04rem, 1rem + 0.3vw, 1.2rem);
  line-height: 1.6;
  color: var(--ink-secondary);
  margin-bottom: 20px;
}

/* Age 9 / 5EGB Explorer Welcome Card (Accessible, Private, Safe) */
.explorer-welcome-card {
  border: 1.5px solid var(--forest);
  background-color: var(--forest-tint);
  padding: 14px 16px;
  margin-bottom: 20px;
}

.welcome-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.welcome-text {
  font-size: 0.94rem;
  line-height: 1.5;
  color: var(--ink);
  margin: 0 0 8px 0;
}

.welcome-text-es {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--forest-deep);
  margin: 0;
  border-top: 1px dashed var(--rule-hairline);
  padding-top: 8px;
}

.hero-coordinates-ledger {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(195px, 1fr));
  gap: 1px;
  background-color: var(--rule-hairline);
  border: 1px solid var(--rule-strong);
  margin: 0 0 22px 0;
}

.ledger-item {
  background-color: var(--bg-paper-bright);
  padding: 10px 12px;
}

.ledger-item dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  margin-bottom: 2px;
}

.ledger-item dd {
  margin: 0;
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--ink);
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

/* Documentary Hero Photograph Frame */
.hero-photo-frame {
  margin: 0;
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
}

.photo-registration-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px;
  padding: 7px 12px;
  background-color: var(--ink);
  color: var(--bg-parchment);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.hero-picture {
  width: 100%;
  background-color: #2A2623;
}

.hero-img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  object-position: center 48%;
}

.photo-caption {
  padding: 12px 14px;
  border-top: 1px solid var(--rule-hairline);
  background-color: var(--bg-specimen);
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--ink-secondary);
}

.caption-credit {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--rule-hairline);
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

/* Bilingual Drawer & Spanish Support */
.bilingual-drawer {
  border: 1px solid var(--rule-hairline);
  background-color: var(--bg-specimen);
  margin-top: 12px;
}

.bilingual-summary {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 12px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  list-style: none;
}

.bilingual-summary::-webkit-details-marker {
  display: none;
}

.summary-badge {
  display: inline-block;
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: var(--forest);
  color: #FFFFFF;
}

.bilingual-body {
  padding: 12px 14px;
  border-top: 1px solid var(--rule-hairline);
  background-color: var(--bg-paper-bright);
  font-size: 0.94rem;
}

/* ==========================================================================
   WORD HELP / PALABRAS DRAWER (ACCESSIBLE, COMPACT, RESPONSIVE)
   ========================================================================== */
.word-help-section {
  padding-block: 16px;
  background-color: var(--bg-paper);
  border-bottom: 1.5px solid var(--rule-light);
}

.word-help-drawer {
  background-color: var(--bg-paper-bright);
  border: 1.5px solid var(--rule-strong);
  border-radius: 3px;
  overflow: hidden;
}

.word-help-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink-primary);
  background-color: var(--bg-paper-warm);
  cursor: pointer;
  user-select: none;
  min-height: 48px;
  border-bottom: 1px solid transparent;
  list-style: none;
}

.word-help-summary::-webkit-details-marker {
  display: none;
}

.word-help-drawer[open] .word-help-summary {
  border-bottom-color: var(--rule-strong);
}

.word-help-summary:hover {
  background-color: var(--bg-paper-highlight, #E8DEC8);
}

.word-help-summary:focus-visible {
  outline: 2px solid var(--accent-rust);
  outline-offset: -2px;
}

.word-help-body {
  padding: 20px;
}

.word-help-intro {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink-secondary);
  margin-bottom: 18px;
}

.vocab-group-title {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-secondary);
  margin-top: 18px;
  margin-bottom: 10px;
  padding-bottom: 4px;
  border-bottom: 1px dashed var(--rule-strong);
}

.vocab-directions-box {
  background-color: var(--bg-paper-warm);
  border: 1px solid var(--rule-light);
  border-radius: 3px;
  padding: 14px 18px;
  margin-bottom: 20px;
}

.directions-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  font-size: 0.92rem;
  line-height: 1.45;
}

.word-help-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
}

.vocab-card {
  background-color: var(--bg-paper);
  border: 1px solid var(--rule-light);
  border-radius: 3px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.vocab-card:hover {
  border-color: var(--rule-strong);
}

.vocab-term {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--accent-rust, #C93B1E);
}

.vocab-es {
  font-weight: 400;
  color: var(--ink-secondary);
  font-style: italic;
}

.vocab-def {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.4;
  color: var(--ink-primary);
}

.teacher-notes-drawer {
  margin-top: 14px;
}

/* ==========================================================================
   JOURNAL SECTIONS & HEADERS
   ========================================================================== */
.journal-section {
  padding-block: clamp(36px, 6vw, 76px);
  border-bottom: 2px solid var(--rule-strong);
}

.section-alt {
  background-color: var(--bg-specimen);
}

.section-basalt {
  background-color: var(--bg-basalt);
  color: var(--ink-on-dark);
}

.section-header-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding-bottom: 22px;
  margin-bottom: 28px;
  border-bottom: 1.5px solid var(--rule-strong);
}

.section-basalt .section-header-grid {
  border-bottom-color: var(--rule-dark);
}

@media (min-width: 820px) {
  .section-header-grid {
    grid-template-columns: 240px 1fr;
    gap: 28px;
  }
}

.section-num-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.chapter-num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--rust);
}

.section-basalt .chapter-num {
  color: var(--amber-dark);
}

.chapter-coords {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.07em;
  color: var(--ink-muted);
}

.section-basalt .chapter-coords {
  color: var(--ink-muted-dark);
}

.section-title {
  font-size: clamp(1.65rem, 1.3rem + 1.8vw, 2.55rem);
  line-height: 1.12;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: clamp(1rem, 0.96rem + 0.25vw, 1.14rem);
  color: var(--ink-secondary);
  max-width: 72ch;
}

.section-basalt .section-subtitle {
  color: var(--ink-muted-dark);
}

/* Science Callout Banner */
.science-callout-banner {
  display: grid;
  grid-template-columns: 1fr;
  border: 1.5px solid var(--forest);
  background-color: var(--forest-tint);
  margin-bottom: 24px;
}

@media (min-width: 680px) {
  .science-callout-banner {
    grid-template-columns: 190px 1fr;
  }
}

.callout-label {
  padding: 12px 14px;
  background-color: var(--forest);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
}

.callout-content {
  padding: 12px 16px;
  font-size: 0.95rem;
  color: var(--ink);
}

/* ==========================================================================
   CHAPTER 01: CARTOGRAPHY & REGIONS
   ========================================================================== */
.map-controls-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px;
  background-color: var(--bg-specimen);
  border: 1px solid var(--rule-strong);
  margin-bottom: 20px;
}

.toolbar-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.region-button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  flex: 1 1 auto;
}

.btn-region {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  background-color: var(--bg-paper-bright);
  color: var(--ink);
  border: 1.5px solid var(--rule-strong);
  font-weight: 600;
  font-size: 0.86rem;
}

.btn-region:hover {
  background-color: var(--bg-parchment);
  border-color: var(--rust);
}

.btn-region.is-active {
  background-color: var(--ink);
  color: var(--bg-parchment);
  border-color: var(--ink);
}

/* Non-color shape indicators for region buttons */
.region-marker-glyph {
  display: inline-block;
  width: 11px;
  height: 11px;
  flex-shrink: 0;
}

.glyph-square {
  background-color: var(--rust);
  border: 1px solid #FFFFFF;
}

.glyph-star {
  background-color: #D97706;
  border-radius: 2px;
  transform: rotate(45deg);
}

.glyph-circle {
  background-color: var(--ocean-ink);
  border-radius: 50%;
}

.glyph-triangle {
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 11px solid #854D0E;
}

.glyph-diamond {
  background-color: var(--forest);
  transform: rotate(45deg);
}

.glyph-hex {
  background-color: #3730A3;
  border-radius: 3px;
}

.cartography-plate {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

@media (min-width: 960px) {
  .cartography-plate {
    grid-template-columns: 5fr 7fr;
  }
}

.map-panel {
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
  display: flex;
  flex-direction: column;
}

.map-panel-header {
  padding: 10px 14px;
  border-bottom: 1px solid var(--rule-hairline);
  background-color: var(--bg-specimen);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.map-panel-title {
  font-size: 1.1rem;
  margin: 0;
}

.svg-map-container {
  width: 100%;
  background-color: var(--ocean-bg);
  position: relative;
}

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

.ocean-bg {
  fill: var(--ocean-bg);
}

.map-caption {
  padding: 10px 14px;
  border-top: 1px solid var(--rule-hairline);
  background-color: var(--bg-specimen);
  font-size: 0.82rem;
  color: var(--ink-secondary);
  margin-top: auto;
}

/* SVG Cartographic Elements */
.sa-country-path {
  fill: #E8DEC8;
  stroke: #6E6355;
  stroke-width: 0.9;
  transition: fill 0.15s ease;
}

.sa-country-ecuador {
  fill: var(--rust);
  stroke: var(--ink);
  stroke-width: 1.6;
  cursor: pointer;
}

.sa-country-ecuador:hover,
.sa-country-ecuador:focus {
  fill: var(--rust-deep);
}

.ecu-neighbor-path {
  fill: #E6DDD0;
  stroke: #8A7E70;
  stroke-width: 1;
}

.ecu-mainland-path {
  fill: #F3EAD8;
  stroke: var(--ink);
  stroke-width: 1.8;
  cursor: pointer;
}

.ecu-mainland-path.is-selected {
  fill: #EFE1C6;
  stroke: var(--rust);
  stroke-width: 2.5;
}

.ecu-island-path {
  fill: #F3EAD8;
  stroke: var(--ink);
  stroke-width: 1.3;
  cursor: pointer;
}

.map-interactive-marker {
  cursor: pointer;
}

.map-interactive-marker:focus {
  outline: none;
}

.map-interactive-marker:focus .marker-focus-ring,
.map-interactive-marker.is-selected .marker-focus-ring {
  opacity: 1;
  stroke-width: 2.8;
}

.svg-label-bold {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 700;
  fill: var(--ink);
}

.svg-mono-small {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--ink-secondary);
}

.svg-inset-heading {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  fill: #F6F1E7 !important;
  letter-spacing: 0.04em;
}

/* Map & Transect HTML Keys */
.map-key-card,
.transect-key-card {
  margin-block: 12px 8px;
  padding: 10px 14px;
  background-color: var(--bg-specimen);
  border: 1px solid var(--rule-hairline);
  font-size: 0.88rem;
}

.map-key-heading,
.transect-key-heading {
  margin: 0 0 8px 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-secondary);
}

.map-key-list,
.transect-key-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 6px 14px;
}

.map-key-list li,
.transect-key-list li {
  line-height: 1.45;
  font-size: 0.86rem;
}

.key-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 2px;
  margin-right: 4px;
}

.key-badge-capital { background: #B45309; color: #FFFFFF; }
.key-badge-peak { background: #1C1917; color: #FFFFFF; }
.key-badge-costa { background: #0D5C75; color: #FFFFFF; }
.key-badge-sierra { background: #78350F; color: #FFFFFF; }
.key-badge-amazonia { background: #1E5E3A; color: #FFFFFF; }
.key-badge-galapagos { background: #312E81; color: #FFFFFF; }

/* Live Region Dossier */
.region-dossier-plate {
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
  padding: clamp(16px, 2.5vw, 26px);
  margin-bottom: 28px;
}

.dossier-header {
  border-bottom: 1px solid var(--rule-hairline);
  padding-bottom: 14px;
  margin-bottom: 16px;
}

.dossier-badge-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.dossier-title {
  font-size: clamp(1.35rem, 1.1rem + 1vw, 1.85rem);
  margin-bottom: 4px;
}

.dossier-es-subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--ink-secondary);
  margin: 0;
}

.dossier-body-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 860px) {
  .dossier-body-grid {
    grid-template-columns: 7fr 5fr;
  }
}

.dossier-Spanish-box {
  margin-top: 12px;
  padding: 10px 14px;
  background-color: var(--bg-specimen);
  border-left: 3px solid var(--forest);
  font-size: 0.92rem;
}

.dossier-specs {
  margin: 0;
  border: 1px solid var(--rule-hairline);
  background-color: var(--bg-parchment);
}

.spec-row {
  padding: 9px 12px;
  border-bottom: 1px solid var(--rule-hairline);
}

.spec-row:last-child {
  border-bottom: none;
}

.spec-row dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.spec-row dd {
  margin: 2px 0 0 0;
  font-weight: 600;
  font-size: 0.9rem;
}

/* Four Regions Ledger */
.subsection-heading {
  font-size: 1.35rem;
  margin-bottom: 14px;
}

.regions-table-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.region-entry {
  border: 1px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.entry-top {
  border-bottom: 1px solid var(--rule-hairline);
  padding-bottom: 8px;
  margin-bottom: 10px;
}

.entry-top h4 {
  font-size: 1.15rem;
  margin: 4px 0 0 0;
}

.entry-es {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--rule-hairline);
  font-size: 0.88rem;
  color: var(--ink-secondary);
}

/* ==========================================================================
   CHAPTER 02: THE ANDES & LANDFORMS
   ========================================================================== */
.transect-plate {
  margin: 0 0 28px 0;
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
}

.transect-svg {
  width: 100%;
  height: auto;
}

.vocabulary-ledger-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.vocab-entry {
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
  padding: 18px;
  display: flex;
  flex-direction: column;
}

.vocab-header {
  border-bottom: 1px solid var(--rule-hairline);
  padding-bottom: 10px;
  margin-bottom: 12px;
}

.vocab-header h3 {
  font-size: 1.22rem;
  margin: 4px 0 0 0;
}

.vocab-classroom-quote {
  padding: 8px 10px;
  background-color: var(--bg-specimen);
  border-left: 3px solid var(--rust);
  font-size: 0.9rem;
}

.vocab-science-text {
  font-size: 0.94rem;
}

.vocab-es {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--rule-hairline);
  font-size: 0.88rem;
  color: var(--ink-secondary);
}

/* ==========================================================================
   CHAPTER 03: CHIMBORAZO READING & GEODESY
   ========================================================================== */
.reading-comparison-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 28px;
}

@media (min-width: 920px) {
  .reading-comparison-grid {
    grid-template-columns: 6fr 6fr;
  }
}

.reading-passage-sheet {
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
  padding: clamp(16px, 2.5vw, 28px);
}

.sheet-top-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--rule-hairline);
}

.passage-heading {
  font-size: clamp(1.45rem, 1.2rem + 1vw, 2rem);
  margin-bottom: 14px;
}

.passage-prose {
  font-family: var(--font-serif);
  font-size: 1.06rem;
  line-height: 1.72;
}

.passage-flagged-sentence {
  font-family: var(--font-sans);
  font-size: 0.93rem;
  line-height: 1.55;
  padding: 12px 14px;
  background-color: var(--rust-tint);
  border: 1.5px solid var(--rust);
}

.flag-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: #FFFFFF;
  background-color: var(--rust);
  padding: 2px 6px;
  margin-right: 6px;
}

.science-notes-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.science-alert-box {
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
  padding: 16px 18px;
}

.alert-critical {
  border-width: 2px;
  border-color: var(--rust);
  background-color: #FFFDFB;
}

.alert-header {
  border-bottom: 1px solid var(--rule-hairline);
  padding-bottom: 8px;
  margin-bottom: 10px;
}

.alert-header h4 {
  font-size: 1.15rem;
  margin: 6px 0 0 0;
}

.alert-es {
  padding-top: 8px;
  border-top: 1px dashed var(--rule-hairline);
  font-size: 0.88rem;
  color: var(--ink-secondary);
}

/* Geodesy Plate */
.geodesy-plate {
  margin: 0;
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
}

.geodesy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 16px;
  align-items: center;
}

@media (min-width: 960px) {
  .geodesy-grid {
    grid-template-columns: 6fr 6fr;
  }
}

.geodesy-svg {
  width: 100%;
  height: auto;
  border: 1px solid var(--rule-hairline);
}

.field-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.field-table th,
.field-table td {
  border: 1px solid var(--rule-hairline);
  padding: 9px 10px;
  text-align: left;
  vertical-align: top;
}

.field-table thead th {
  background-color: var(--bg-specimen);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.table-note {
  display: block;
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-top: 2px;
}

/* ==========================================================================
   CHAPTER 04: VOLCANO CUTAWAY LAB (DARK BASALT STAGE)
   ========================================================================== */
.volcanic-states-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 16px;
  margin-bottom: 26px;
}

.state-plate {
  border: 1px solid var(--rule-dark);
  background-color: var(--bg-basalt-elevated);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.state-header {
  border-bottom: 1px solid var(--rule-dark);
  padding-bottom: 10px;
  margin-bottom: 10px;
}

.state-header h3 {
  font-size: 1.15rem;
  margin: 6px 0 0 0;
  color: var(--ink-on-dark);
}

.state-classroom {
  padding: 8px 10px;
  background-color: var(--bg-basalt-panel);
  border-left: 3px solid var(--amber-dark);
  font-size: 0.88rem;
}

.state-science {
  font-size: 0.92rem;
  color: #E7E0D6;
}

.state-es {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--rule-dark);
  font-size: 0.85rem;
  color: var(--ink-muted-dark);
}

/* Prediction Hypothesis Box */
.prediction-gate-panel {
  border: 1.5px solid var(--amber-dark);
  background-color: var(--bg-basalt-elevated);
  padding: 18px;
  margin-bottom: 24px;
}

.prediction-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.prediction-title {
  font-size: 1.25rem;
  margin: 4px 0 0 0;
}

.prediction-prompt {
  font-size: 0.95rem;
  color: #E7E0D6;
}

.prediction-options {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 12px;
}

@media (min-width: 860px) {
  .prediction-options {
    grid-template-columns: repeat(3, 1fr);
  }
}

.btn-hypothesis {
  text-align: left;
  padding: 12px;
  background-color: var(--bg-basalt-panel);
  color: var(--ink-on-dark);
  border: 1px solid var(--rule-dark);
  line-height: 1.45;
  font-size: 0.88rem;
}

.btn-hypothesis:hover,
.btn-hypothesis.is-selected {
  border-color: var(--amber-dark);
  background-color: #352E29;
}

.prediction-compare-box {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--rule-dark);
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 720px) {
  .prediction-compare-box {
    grid-template-columns: 1fr 2fr;
  }
}

.compare-col {
  padding: 12px;
  background-color: var(--bg-basalt);
  border: 1px solid var(--rule-dark);
  font-size: 0.9rem;
}

.compare-es {
  font-size: 0.85rem;
  color: var(--ink-muted-dark);
}

/* Main Volcano Stage + 6 Parts Grid */
.volcano-lab-frame {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-bottom: 28px;
}

@media (min-width: 960px) {
  .volcano-lab-frame {
    grid-template-columns: 7fr 5fr;
  }
}

.volcano-stage-column {
  border: 1.5px solid var(--rule-dark);
  background-color: #12100F;
  display: flex;
  flex-direction: column;
}

.stage-disclaimer-bar {
  padding: 8px 12px;
  background-color: var(--bg-basalt-elevated);
  border-bottom: 1px solid var(--rule-dark);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.stage-disclaimer-text {
  font-size: 0.78rem;
  color: var(--ink-muted-dark);
}

.volcano-stage-container {
  position: relative;
  width: 100%;
  min-height: 320px;
  height: clamp(320px, 52vw, 460px);
  background-color: #181615;
  overflow: hidden;
  touch-action: pan-y;
}

.volcano-stage-container canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

.volcano-fallback-wrap {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.volcano-schematic-svg {
  width: 100%;
  height: 100%;
  max-height: 460px;
}

.volc-svg-part {
  cursor: pointer;
  transition: opacity 0.15s ease, filter 0.15s ease;
}

.volc-svg-part.is-highlighted {
  filter: drop-shadow(0 0 6px #FDE047);
}

.volc-callout-label {
  cursor: pointer;
}

.volc-callout-label.is-highlighted rect {
  stroke: #FDE047;
  stroke-width: 2.4;
  fill: #3B3123;
}

.svg-dark-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  fill: #F6F1E7;
}

.svg-dark-mono {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: #A8A29E;
}

.volcano-controls-toolbar {
  padding: 10px 12px;
  background-color: var(--bg-basalt-elevated);
  border-top: 1px solid var(--rule-dark);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.control-cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.btn-stage-ctrl {
  padding: 6px 11px;
  background-color: var(--bg-basalt-panel);
  color: var(--ink-on-dark);
  border: 1px solid #6E655C;
  font-weight: 600;
  font-size: 0.82rem;
}

.btn-stage-ctrl:hover {
  border-color: var(--amber-dark);
  background-color: #3A332E;
}

.cutaway-slider-cluster {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 1 auto;
}

.slider-label {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted-dark);
}

.cut-range-input {
  width: 100px;
  min-width: 80px;
  height: 44px;
  accent-color: var(--amber-dark);
}

.btn-stage-reset {
  white-space: nowrap;
}

.stage-status-line {
  padding: 6px 12px;
  margin: 0;
  background-color: #12100F;
  border-top: 1px solid var(--rule-dark);
  color: var(--ink-muted-dark);
}

/* Six Volcano Parts Buttons & Inspector */
.volcano-parts-column {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-inline: 12px;
}

.parts-panel-title {
  font-size: 1.35rem;
  margin: 4px 0 0 0;
}

.parts-button-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
  gap: 8px;
}

.btn-volcano-part {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 10px 12px;
  background-color: var(--bg-basalt-elevated);
  color: var(--ink-on-dark);
  border: 1.5px solid var(--rule-dark);
  text-align: left;
}

.btn-volcano-part:hover {
  border-color: var(--amber-dark);
}

.btn-volcano-part.is-active {
  background-color: #3B281E;
  border-color: var(--amber-dark);
  box-shadow: inset 3px 0 0 var(--amber-dark);
}

.part-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--amber-dark);
}

.part-name {
  font-weight: 700;
  font-size: 0.96rem;
}

.part-es {
  font-size: 0.76rem;
  color: var(--ink-muted-dark);
}

.part-inspector-box {
  border: 1.5px solid var(--amber-dark);
  background-color: var(--bg-basalt-elevated);
  padding: 16px;
  flex: 1;
}

.inspector-meta {
  margin-bottom: 8px;
}

.inspector-title {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.inspector-text {
  font-size: 0.94rem;
  color: #F3EDE2;
}

.inspector-contrast {
  font-size: 0.88rem;
  padding: 8px 10px;
  background-color: var(--bg-basalt);
  border-left: 3px solid var(--rust);
}

.inspector-es {
  padding-top: 8px;
  border-top: 1px dashed var(--rule-dark);
  font-size: 0.86rem;
  color: var(--ink-muted-dark);
}

/* Accessible HTML Reference Grid of All 6 Parts */
.accessible-parts-catalog-drawer {
  margin-top: 18px;
  border-top: 1px solid var(--rule-dark);
  padding-top: 14px;
}

.catalog-summary {
  cursor: pointer;
  user-select: none;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--ink-on-dark);
  padding: 8px 4px;
  outline: none;
  margin-bottom: 12px;
}

.catalog-summary:hover,
.catalog-summary:focus-visible {
  color: var(--amber-light);
}

.subsection-heading-dark {
  font-size: 1.2rem;
  color: var(--ink-on-dark);
  margin-bottom: 12px;
}

.parts-catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px;
}

.catalog-part-item {
  padding: 12px 14px;
  border: 1px solid var(--rule-dark);
  background-color: var(--bg-basalt-elevated);
  font-size: 0.86rem;
}

.catalog-part-item h4 {
  font-size: 0.98rem;
  margin-bottom: 6px;
  color: #FDE68A;
}

/* ==========================================================================
   CHAPTER 05: FIVE NATURAL DISASTERS
   ========================================================================== */
.disasters-ledger-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.disaster-plate {
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
  padding: 18px;
  display: flex;
  flex-direction: column;
}

.disaster-plate-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--rule-hairline);
}

.disaster-glyph-box {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-specimen);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--rust-deep);
}

.hazard-svg {
  width: 28px;
  height: 28px;
}

.disaster-plate-header h3 {
  font-size: 1.2rem;
  margin: 4px 0 0 0;
}

.disaster-def {
  font-size: 0.94rem;
}

.disaster-avoid {
  font-size: 0.88rem;
  padding: 8px 10px;
  background-color: var(--rust-tint);
  border-left: 3px solid var(--rust);
}

.disaster-scenario-drawer {
  margin-block: 8px;
}

.scenario-summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ink-secondary);
  padding: 4px 0;
  user-select: none;
}

.scenario-summary:hover,
.scenario-summary:focus-visible {
  color: var(--forest-deep);
}

.disaster-scenario {
  font-size: 0.89rem;
  padding: 10px 12px;
  background-color: var(--bg-specimen);
  border: 1px solid var(--rule-hairline);
  margin-top: 6px;
  margin-bottom: 12px;
}

.disaster-es {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--rule-hairline);
  font-size: 0.86rem;
  color: var(--ink-secondary);
}

/* ==========================================================================
   CHAPTER 06: MULTIMEDIA FIELD ARCHIVE
   ========================================================================== */
.media-archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.media-entry-plate {
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.media-player-el {
  width: 100%;
  background-color: var(--bg-basalt);
}

.transcript-box {
  max-height: 240px;
  overflow-y: auto;
  padding: 12px;
  background-color: var(--bg-parchment);
  border: 1px solid var(--rule-hairline);
  font-size: 0.88rem;
  white-space: pre-wrap;
}

/* Media Playback Speed Controls (Accessible, >=44px touch targets) */
.media-speed-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-block: 4px;
}

.speed-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink-secondary);
  margin-right: 4px;
}

.btn-speed-ctrl {
  min-height: 44px;
  min-width: 44px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 700;
  background-color: var(--bg-paper-bright);
  border: 1.5px solid var(--rule-strong);
  color: var(--ink);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-speed-ctrl:hover {
  background-color: var(--bg-specimen);
}

.btn-speed-ctrl.is-active {
  background-color: var(--forest);
  color: #FFFFFF;
  border-color: var(--forest-deep);
}

.btn-speed-ctrl:focus-visible {
  outline: 2px solid var(--forest);
  outline-offset: 2px;
}

.media-fallback-banner {
  padding: 10px 14px;
  background-color: #FEF3C7;
  border: 1.5px solid #B45309;
  font-size: 0.88rem;
  color: #92400E;
  margin-bottom: 14px;
  line-height: 1.45;
}

.transcript-es-box {
  margin-top: 10px;
  padding: 10px 12px;
  background-color: var(--bg-paper-bright);
  border-left: 3px solid var(--forest);
  border-top: 1px solid var(--rule-hairline);
  font-size: 0.88rem;
  line-height: 1.5;
}

.transcript-lang-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--forest-deep);
  margin: 0 0 4px 0;
}

/* ==========================================================================
   CHAPTER 07: PRACTICE & VERIFICATION (30 QUESTIONS)
   ========================================================================== */
.practice-dashboard-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-specimen);
  margin-bottom: 16px;
}

.score-summary-block {
  flex: 1 1 260px;
}

.score-readout {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  margin-block: 4px;
}

.score-note {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--ink-secondary);
}

.progress-track {
  width: 100%;
  max-width: 340px;
  height: 8px;
  background-color: var(--bg-paper-bright);
  border: 1px solid var(--rule-strong);
}

.progress-fill {
  height: 100%;
  background-color: var(--forest);
  transition: width 0.2s ease;
}

.practice-controls-cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.view-mode-group {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.select-input {
  padding: 6px 10px;
  background-color: var(--bg-paper-bright);
  color: var(--ink);
  border: 1.5px solid var(--rule-strong);
  font-weight: 600;
  max-width: 100%;
}

.btn-reset-danger {
  border-color: var(--rust);
  color: var(--rust-deep);
}

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

/* Question Number Jump Grid */
.question-jump-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 20px;
}

.btn-jump-q {
  min-width: 44px;
  min-height: 44px;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  background-color: var(--bg-paper-bright);
  color: var(--ink);
  border: 1px solid var(--rule-strong);
}

.btn-jump-q.is-current {
  border-width: 2px;
  border-color: var(--rust);
  background-color: var(--bg-specimen);
}

.btn-jump-q.is-correct {
  background-color: var(--forest);
  color: #FFFFFF;
  border-color: var(--forest-deep);
}

/* Practice Question Plate */
.practice-questions-mount {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.question-plate {
  border: 1.5px solid var(--rule-strong);
  background-color: var(--bg-paper-bright);
  padding: clamp(16px, 2.5vw, 24px);
}

.question-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--rule-hairline);
}

.question-fieldset {
  border: none;
  margin: 0;
  padding: 0;
}

.question-legend {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 1rem + 0.4vw, 1.3rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
  padding: 0;
}

.question-es-prompt {
  font-size: 0.9rem;
  color: var(--ink-secondary);
  margin-bottom: 14px;
}

/* Option Rows (MC & TF) */
.options-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.option-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--rule-strong);
  background-color: var(--bg-parchment);
  cursor: pointer;
  font-size: 0.95rem;
}

.option-label:hover {
  background-color: var(--bg-specimen);
}

.option-radio {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--forest);
}

/* Short Text Input Question */
.text-answer-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 14px;
}

.text-answer-input {
  width: 100%;
  max-width: 420px;
  min-height: 44px;
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: 1rem;
  border: 1.5px solid var(--rule-strong);
  background-color: #FFFFFF;
  color: var(--ink);
}

.word-bank-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.btn-word-chip {
  padding: 6px 10px;
  min-height: 44px;
  font-size: 0.82rem;
  background-color: var(--bg-specimen);
  border: 1px solid var(--rule-strong);
  color: var(--ink);
}

/* Ordering via Accessible Selects */
.order-rows-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 14px;
}

.order-step-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background-color: var(--bg-parchment);
  border: 1px solid var(--rule-hairline);
}

.order-step-label {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  min-width: 90px;
}

.order-select {
  flex: 1 1 200px;
  min-height: 44px;
  padding: 6px 10px;
  font-size: 0.92rem;
  border: 1.5px solid var(--rule-strong);
  background-color: #FFFFFF;
  color: var(--ink);
}

/* Question Action & Feedback Box */
.question-actions-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.question-feedback-box {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1.5px solid var(--rule-strong);
  font-size: 0.92rem;
}

.feedback-hint {
  background-color: #FEF3C7;
  border-color: #B45309;
}

.feedback-correct {
  background-color: var(--forest-tint);
  border-color: var(--forest);
}

.feedback-explain {
  background-color: var(--rust-tint);
  border-color: var(--rust);
}

.btn-retry {
  min-height: 44px;
  margin-top: 10px;
  cursor: pointer;
}

/* Question Vocabulary Strip & Bilingual Word Help */
.question-vocab-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
  padding: 6px 10px;
  background-color: var(--bg-specimen);
  border: 1px dashed var(--rule-hairline);
  font-size: 0.82rem;
}

.vocab-title {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--ink-secondary);
  font-size: 0.76rem;
  text-transform: uppercase;
  margin-right: 2px;
}

.vocab-pill {
  display: inline-block;
  padding: 2px 7px;
  background-color: var(--bg-paper-bright);
  border: 1px solid var(--rule-hairline);
  font-size: 0.8rem;
  color: var(--ink);
}

.vocab-pill strong {
  color: var(--forest-deep);
}

/* Question-level Spanish Drawer */
.question-es-drawer {
  margin-top: 14px;
  background-color: var(--bg-paper-bright);
  border-left: 3px solid var(--forest);
}

.question-es-drawer .bilingual-summary {
  min-height: 40px;
  padding: 6px 10px;
  font-size: 0.86rem;
}

.question-es-drawer .bilingual-body {
  padding: 10px 12px;
  font-size: 0.88rem;
  line-height: 1.45;
}

.q-es-options {
  list-style: none;
  padding: 0;
  margin: 6px 0 10px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.q-es-item {
  padding: 4px 8px;
  background-color: var(--bg-parchment);
  border: 1px solid var(--rule-hairline);
  font-size: 0.84rem;
}

.q-es-hint {
  margin-top: 6px;
  color: var(--forest-deep);
  font-size: 0.84rem;
}

.practice-seq-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--rule-hairline);
}

/* ==========================================================================
   SITE FOOTER & COLOPHON
   ========================================================================== */
.site-footer {
  background-color: var(--bg-basalt);
  color: var(--ink-on-dark);
  padding-block: clamp(32px, 5vw, 56px);
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rule-dark);
}

@media (min-width: 860px) {
  .footer-top-grid {
    grid-template-columns: 5fr 7fr;
  }
}

.footer-heading {
  font-size: 1.3rem;
  margin: 6px 0 12px 0;
  color: var(--ink-on-dark);
}

.footer-text {
  font-size: 0.9rem;
  color: var(--ink-muted-dark);
}

.footer-links-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: #FDE68A;
  font-weight: 700;
}

.link-note {
  display: block;
  font-size: 0.82rem;
  color: var(--ink-muted-dark);
}

.footer-bibliography-drawer {
  margin-top: 20px;
  border: 1px solid var(--rule-dark);
  background-color: var(--bg-basalt-elevated);
}

.footer-bib-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 44px;
  padding: 10px 14px;
  font-weight: 700;
  cursor: pointer;
}

.footer-bib-body {
  padding: 16px;
  border-top: 1px solid var(--rule-dark);
  font-size: 0.86rem;
  color: var(--ink-muted-dark);
}

.footer-bib-body a {
  color: #FDE68A;
}

.bib-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 820px) {
  .bib-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.bib-list {
  padding-left: 18px;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-bottom-bar {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid var(--rule-dark);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-muted-dark);
}

/* ==========================================================================
   320PX & 390PX MOBILE VIEWPORT HARDENING & REDUCED MOTION
   ========================================================================== */
@media (max-width: 480px) {
  .masthead {
    position: relative;
    top: auto;
  }

  .masthead-meta-bar {
    padding-block: 2px;
  }

  .masthead-meta-inner {
    justify-content: flex-end;
    gap: 0;
  }

  .masthead-meta-inner .mono-tag {
    display: none;
  }

  #toggle-spanish-all {
    min-height: 44px;
    padding: 4px 10px;
    font-size: 0.8rem;
  }

  .brand-kicker {
    display: none;
  }

  .brand-title {
    font-size: 1.15rem;
    line-height: 1.15;
  }

  .masthead-nav-wrap {
    padding-block: 6px;
    gap: 8px;
  }

  .primary-nav {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    padding-bottom: 2px;
  }

  .nav-list {
    display: flex;
    flex-wrap: nowrap;
    white-space: nowrap;
    gap: 6px;
    width: max-content;
    justify-content: flex-start;
  }

  .nav-link {
    min-height: 44px;
    padding: 6px 10px;
    font-size: 0.8rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .hero-grid {
    display: flex;
    flex-direction: column;
  }

  .hero-editorial-col {
    display: contents;
  }

  .editorial-kicker-row {
    display: none;
  }

  .hero-headline {
    order: 1;
    font-size: 1.75rem;
    margin-bottom: 12px;
  }

  .hero-photo-frame {
    order: 2;
    margin-block: 4px 16px;
  }

  .photo-registration-bar {
    display: none;
  }

  .hero-lead {
    order: 3;
    margin-bottom: 14px;
  }

  .explorer-welcome-card {
    order: 4;
    margin-bottom: 16px;
  }

  .hero-coordinates-ledger {
    order: 5;
    margin-bottom: 16px;
  }

  .hero-cta-row {
    order: 6;
    margin-bottom: 14px;
  }

  .bilingual-drawer {
    order: 7;
  }

  .volcano-parts-column {
    padding-inline: 12px;
  }

  .parts-selector-header {
    padding-inline: 2px;
  }

  .field-table th,
  .field-table td {
    padding: 6px;
    font-size: 0.8rem;
  }

  .word-help-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .directions-list {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .word-help-body {
    padding: 14px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}