:root {
  --black: #000000;
  --white: #ffffff;
  --white-soft: #d7d7d7;
  --muted: #92928d;
  --line: rgba(255, 255, 255, 0.17);
  --line-strong: rgba(255, 255, 255, 0.34);
  --ember: #ff4b2b;
  --sulfur: #ffd35a;
  --violet: #a58cff;
  --blue: #6f9cff;
  --max-width: 1240px;
  --reading-width: 760px;
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
  --nav-height: 58px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--black);
}

body {
  margin: 0;
  color: var(--white);
  background: var(--black) !important;
  font-family: "Satoshi", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.58;
  font-feature-settings: "tnum" 1, "kern" 1;
  overflow-x: hidden;
}

body,
main,
.page-columns,
#quarto-content,
#quarto-document-content,
.quarto-container,
.story-shell {
  width: 100%;
  max-width: none !important;
  margin: 0 !important;
  padding: 0 !important;
  color: var(--white);
  background: var(--black) !important;
}

#title-block-header,
.quarto-title-block,
header#title-block-header,
nav.navbar,
#quarto-header,
.quarto-secondary-nav,
.quarto-margin-sidebar,
.quarto-sidebar,
.page-navigation {
  display: none !important;
}

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

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-underline-offset: 0.22em;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--sulfur);
  outline-offset: 4px;
}

::selection {
  color: var(--black);
  background: var(--sulfur);
}

.scroll-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 200;
  height: 2px;
  background: transparent;
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--ember), var(--sulfur));
}

.story-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--nav-height);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
  padding: 0 var(--gutter);
  color: var(--white-soft);
  background: rgba(0, 0, 0, 0.86);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
  transform: translateY(-110%);
  transition: transform 350ms ease;
}

.story-nav.is-visible {
  transform: translateY(0);
}

.story-mark {
  display: flex;
  align-items: center;
  gap: 0.33rem;
  color: var(--white);
  font-size: 0.76rem;
  font-weight: 760;
  letter-spacing: 0.06em;
  text-decoration: none;
}

.story-mark i {
  width: 18px;
  height: 1px;
  background: var(--ember);
  transform: rotate(-45deg);
}

.story-nav-links {
  display: flex;
  justify-content: center;
  gap: clamp(1rem, 2.8vw, 2.7rem);
}

.story-nav-links a {
  position: relative;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 180ms ease;
}

.story-nav-links a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -0.48rem;
  left: 0;
  height: 1px;
  background: var(--ember);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.story-nav-links a.is-active,
.story-nav-links a:hover {
  color: var(--white);
}

.story-nav-links a.is-active::after {
  transform: scaleX(1);
}

.story-nav-year {
  color: var(--muted);
  font-size: 0.67rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero {
  position: relative;
  min-height: max(720px, 100svh);
  overflow: hidden;
  isolation: isolate;
  background: var(--black);
}

.hero-visual {
  position: absolute;
  z-index: 0;
  inset: 0;
  margin: 0;
}

.hero-visual::before {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 0;
  background:
    radial-gradient(ellipse at 53% 47%, rgba(0, 0, 0, 0.2) 0, rgba(0, 0, 0, 0.08) 31%, transparent 56%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.22) 0, transparent 20%, transparent 72%, rgba(0, 0, 0, 0.68) 100%);
  pointer-events: none;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  filter: saturate(0.94) contrast(1.08) brightness(0.96);
}

.hero-vignette {
  position: absolute;
  z-index: 1;
  inset: 0;
  background:
    radial-gradient(ellipse at 52% 47%, transparent 16%, rgba(0, 0, 0, 0.03) 53%, rgba(0, 0, 0, 0.4) 100%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.08), transparent 72%, #000 100%);
  pointer-events: none;
}

.hero-copy {
  position: absolute;
  z-index: 2;
  top: 47%;
  left: 52%;
  width: min(780px, 64vw);
  text-align: center;
  text-shadow: 0 2px 28px rgba(0, 0, 0, 0.9);
  transform: translate(-50%, -50%);
}

.eyebrow,
.chapter-index,
.lab-kicker {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin: 0 0 1.35rem;
}

.eyebrow span:first-child {
  color: var(--ember);
}

.eyebrow span + span {
  padding-left: 1.5rem;
  border-left: 1px solid var(--line);
}

.hero h1 {
  max-width: 760px;
  margin: 0 auto;
  color: var(--white);
  font-size: clamp(3.75rem, 6.6vw, 7.2rem);
  font-weight: 760;
  letter-spacing: -0.075em;
  line-height: 0.88;
  text-transform: uppercase;
}

.hero h1 em {
  color: transparent;
  font-style: normal;
  font-weight: 620;
  -webkit-text-stroke: 1.5px var(--white);
}

.hero-lede {
  max-width: 610px;
  margin: 1.45rem auto 1.8rem;
  color: var(--white-soft);
  font-size: clamp(1rem, 1.2vw, 1.18rem);
  line-height: 1.55;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1px;
  width: fit-content;
  margin: 0 auto;
  border-block: 1px solid var(--line);
}

.hero-stats p {
  min-width: 165px;
  margin: 0;
  padding: 0.85rem clamp(1rem, 2vw, 1.7rem) 0.95rem 0;
}

.hero-stats p + p {
  padding-left: clamp(1rem, 2vw, 1.7rem);
  border-left: 1px solid var(--line);
}

.hero-stats strong,
.hero-stats span {
  display: block;
}

.hero-stats strong {
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 650;
  line-height: 1.2;
}

.hero-stats span {
  margin-top: 0.12rem;
  color: var(--muted);
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.scroll-cue {
  position: absolute;
  z-index: 2;
  right: var(--gutter);
  bottom: 3rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
  transform: rotate(90deg) translateY(-100%);
  transform-origin: right bottom;
}

.scroll-cue i {
  display: block;
  width: 42px;
  height: 1px;
  background: var(--ember);
  animation: cue-pulse 2.2s ease-in-out infinite;
}

@keyframes cue-pulse {
  50% { transform: scaleX(0.4); transform-origin: right; }
}

.opening,
.chapter,
.field-guide {
  position: relative;
  padding: clamp(4.5rem, 8vw, 7rem) var(--gutter);
  background: var(--black);
}

.opening {
  max-width: var(--max-width);
  margin: 0 auto !important;
  padding-top: clamp(6rem, 11vw, 9rem);
}

.opening-line {
  max-width: 900px;
  margin: 0 0 3rem;
  font-size: clamp(2.6rem, 5.2vw, 5.2rem);
  font-weight: 540;
  letter-spacing: -0.06em;
  line-height: 1;
}

.opening-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
  gap: clamp(2rem, 7vw, 7rem);
  max-width: 1030px;
  margin-left: auto;
}

.opening-grid p {
  margin: 0;
  color: var(--muted);
}

.opening-grid .opening-lede {
  color: var(--white-soft);
  font-size: clamp(1.3rem, 2vw, 1.75rem);
  line-height: 1.48;
}

.opening-ledger {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(5rem, 10vw, 8rem);
  border-block: 1px solid var(--line);
}

.opening-ledger article {
  min-height: 230px;
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1.6rem 1.6rem 0;
}

.opening-ledger article + article {
  padding-left: 1.6rem;
  border-left: 1px solid var(--line);
}

.opening-ledger span {
  color: var(--muted);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.opening-ledger strong {
  margin: auto 0 0.7rem;
  color: var(--sulfur);
  font-size: clamp(3.2rem, 6vw, 5.8rem);
  font-weight: 560;
  letter-spacing: -0.07em;
  line-height: 0.8;
}

.opening-ledger p {
  max-width: 270px;
  margin: 0;
  color: var(--white-soft);
  font-size: 0.9rem;
  line-height: 1.45;
}

.chapter::before {
  content: "";
  position: absolute;
  top: 0;
  right: var(--gutter);
  left: var(--gutter);
  height: 1px;
  background: var(--line);
}

.chapter-heading {
  width: min(var(--reading-width), 100%);
  margin: 0 auto clamp(3rem, 5vw, 5rem);
}

.chapter-heading-wide {
  width: min(980px, 100%);
}

.chapter-index {
  margin: 0 0 1rem;
}

.chapter-index span {
  display: inline-block;
  min-width: 2.7rem;
  margin-right: 0.7rem;
  color: var(--ember);
}

.chapter h2,
.field-guide h2 {
  margin: 0;
  font-size: clamp(2.4rem, 5.2vw, 5.5rem);
  font-weight: 540;
  letter-spacing: -0.065em;
  line-height: 1.02;
}

.chapter-heading > p:last-child {
  max-width: 690px;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.15vw, 1.12rem);
  line-height: 1.55;
}

.lab-topline {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--line);
}

.lab-topline h3,
.volcano-copy h3,
.region-profile-copy h3,
.energy-copy h3,
.event-detail h3 {
  margin: 0.25rem 0 0;
  color: var(--white);
  font-size: clamp(1.25rem, 2.2vw, 2rem);
  font-weight: 560;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.lab-kicker {
  display: block;
  color: var(--ember);
}

.corridor-lab,
.depth-lab,
.magnitude-lab,
.timeline-lab {
  width: min(var(--max-width), 100%);
  margin: 0 auto;
}

.scope-switch {
  display: flex;
  gap: 0.35rem;
}

.scope-switch button,
.region-chips button,
.reset-view,
#reset-timeline,
.event-list button {
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.scope-switch button {
  min-width: 76px;
  padding: 0.55rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 650;
}

.scope-switch button:hover,
.scope-switch button.is-active,
.region-chips button:hover,
.region-chips button.is-active,
.event-list button:hover,
.event-list button.is-active {
  color: var(--black);
  background: var(--white);
  border-color: var(--white);
}

.corridor-map-wrap {
  position: relative;
  width: 100%;
  margin: 1.5rem 0;
  aspect-ratio: 1.78;
  overflow: hidden;
  background: var(--black);
  border-block: 1px solid var(--line);
}

#corridor-map {
  width: 100%;
  height: 100%;
}

.map-loading,
.depth-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  background: var(--black);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: opacity 300ms ease;
}

.map-loading.is-hidden,
.depth-loading.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.map-corner-note {
  position: absolute;
  right: 1rem;
  bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.68rem;
}

.map-corner-note i {
  width: 7px;
  height: 7px;
  background: var(--ember);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--ember);
}

.corridor-controls {
  display: grid;
  grid-template-columns: 170px 1fr;
  align-items: center;
  column-gap: 1.5rem;
  padding: 1.1rem 0 1.5rem;
  border-bottom: 1px solid var(--line);
}

.corridor-controls > label {
  color: var(--white-soft);
  font-size: 0.85rem;
}

.range-row {
  display: grid;
  grid-template-columns: 1fr 100px;
  align-items: center;
  gap: 1.2rem;
}

input[type="range"] {
  width: 100%;
  height: 2px;
  appearance: none;
  background: var(--line-strong);
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  width: 18px;
  height: 18px;
  appearance: none;
  background: var(--black);
  border: 2px solid var(--sulfur);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(255, 211, 90, 0.12);
}

input[type="range"]::-moz-range-thumb {
  width: 15px;
  height: 15px;
  background: var(--black);
  border: 2px solid var(--sulfur);
  border-radius: 50%;
}

.range-row output,
.magnitude-control output {
  color: var(--sulfur);
  font-size: 1.1rem;
  font-weight: 650;
  text-align: right;
}

.range-ticks {
  grid-column: 2;
  display: flex;
  justify-content: space-between;
  padding-right: 116px;
  color: var(--muted);
  font-size: 0.62rem;
}

.corridor-result {
  display: grid;
  grid-template-columns: minmax(210px, 0.6fr) minmax(190px, 0.45fr) minmax(300px, 1fr);
  gap: 1px;
  border-bottom: 1px solid var(--line);
}

.corridor-result p {
  margin: 0;
  padding: 1.8rem 1.8rem 2rem 0;
}

.corridor-result p + p,
#corridor-share-chart {
  padding-left: 1.8rem;
  border-left: 1px solid var(--line);
}

.corridor-result strong,
.corridor-result span {
  display: block;
}

.corridor-result strong {
  font-size: clamp(2.1rem, 4vw, 4.1rem);
  font-weight: 540;
  letter-spacing: -0.055em;
  line-height: 1;
}

.result-number strong {
  color: var(--sulfur);
}

.corridor-result span {
  max-width: 200px;
  margin-top: 0.55rem;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.35;
}

#corridor-share-chart {
  width: 100%;
  height: 135px;
  padding-top: 1rem;
  overflow: visible;
}

.finding {
  width: min(940px, 100%);
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 2rem;
  margin: clamp(3rem, 6vw, 6rem) auto;
  padding: 1.4rem 0;
  border-block: 1px solid var(--line-strong);
}

.finding span {
  color: var(--ember);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.finding p {
  margin: 0;
  color: var(--white-soft);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  line-height: 1.45;
}

.body-copy {
  width: min(var(--reading-width), 100%);
  margin: 0 auto;
  color: var(--muted);
  font-size: 1.08rem;
}

.body-copy-narrow {
  margin-top: 3.5rem;
}

.subduction-scrolly {
  width: min(var(--max-width), 100%);
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.65fr);
  gap: clamp(2rem, 5vw, 5rem);
  margin: 0 auto;
}

.subduction-sticky {
  position: sticky;
  top: calc(var(--nav-height) + 3vh);
  height: calc(96svh - var(--nav-height));
  min-height: 560px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.diagram-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--line);
}

#diagram-stage {
  color: var(--sulfur);
}

.subduction-diagram {
  width: 100%;
  overflow: visible;
  background: var(--black);
  border-bottom: 1px solid var(--line);
}

.subduction-diagram .ocean {
  fill: rgba(111, 156, 255, 0.18);
  stroke: rgba(111, 156, 255, 0.75);
  stroke-width: 2;
}

.subduction-diagram .oceanic-plate {
  fill: #202124;
  stroke: #888a90;
  stroke-width: 2.5;
}

.subduction-diagram .upper-plate {
  fill: #27221e;
  stroke: #a39384;
  stroke-width: 2.5;
}

.subduction-diagram .coastline,
.subduction-diagram .trench-mark {
  fill: none;
  stroke: var(--white-soft);
  stroke-width: 2;
}

.motion-arrows {
  color: var(--sulfur);
}

.motion-arrows path {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

.quake-layer circle {
  fill: var(--ember);
  filter: drop-shadow(0 0 5px var(--ember));
}

.water-release circle {
  fill: var(--blue);
}

.magma-paths path {
  fill: none;
  stroke: var(--ember);
  stroke-width: 8;
  stroke-linecap: round;
}

.volcanoes path {
  fill: #38312a;
  stroke: #ae9987;
  stroke-width: 2;
}

.volcanoes .volcano-core {
  fill: none;
  stroke: var(--ember);
  stroke-width: 6;
}

.diagram-labels text {
  fill: var(--muted);
  font-size: 17px;
  letter-spacing: 0.04em;
}

.quake-layer,
.water-release,
.magma-paths,
.volcanoes {
  opacity: 0.08;
  transition: opacity 500ms ease;
}

.subduction-diagram.state-1 .quake-layer,
.subduction-diagram.state-2 .quake-layer,
.subduction-diagram.state-3 .quake-layer {
  opacity: 1;
}

.subduction-diagram.state-2 .water-release,
.subduction-diagram.state-2 .magma-paths,
.subduction-diagram.state-3 .water-release,
.subduction-diagram.state-3 .magma-paths {
  opacity: 1;
}

.subduction-diagram.state-3 .volcanoes {
  opacity: 1;
}

.depth-ruler {
  display: flex;
  justify-content: space-between;
  padding: 0.55rem 0;
  color: var(--muted);
  font-size: 0.62rem;
}

.subduction-steps {
  padding: 16svh 0 18svh;
}

.subduction-step {
  min-height: 62svh;
  display: grid;
  grid-template-columns: 38px 1fr;
  align-content: center;
  gap: 1rem;
  color: var(--muted);
  border-left: 1px solid var(--line);
  transition: color 250ms ease, border-color 250ms ease;
}

.subduction-step span {
  padding-left: 0.9rem;
  color: var(--muted);
  font-size: 0.7rem;
}

.subduction-step p {
  max-width: 320px;
  margin: 0;
  font-size: 1.05rem;
}

.subduction-step.is-active {
  color: var(--white);
  border-left-color: var(--ember);
}

.subduction-step.is-active span {
  color: var(--ember);
}

.volcano-ledger {
  width: min(1060px, 100%);
  display: grid;
  grid-template-columns: minmax(320px, 0.8fr) minmax(300px, 1fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
  margin: clamp(5rem, 10vw, 9rem) auto 0;
}

.volcano-wheel-wrap {
  position: relative;
  width: min(420px, 100%);
  aspect-ratio: 1;
}

.volcano-wheel-label {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  pointer-events: none;
}

.volcano-wheel-label strong {
  color: var(--sulfur);
  font-size: clamp(3rem, 6vw, 5.3rem);
  font-weight: 540;
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.volcano-wheel-label span {
  max-width: 120px;
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.25;
  text-align: center;
  text-transform: uppercase;
}

.volcano-copy p {
  color: var(--muted);
}

.volcano-copy h3 {
  max-width: 520px;
  font-size: clamp(2rem, 3.5vw, 3.7rem);
  line-height: 1;
}

.source-link {
  display: inline-block;
  margin-top: 1.1rem;
  color: var(--white-soft);
  font-size: 0.75rem;
  text-decoration-color: var(--ember);
}

.depth-summary {
  width: min(980px, 100%);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 auto 3.5rem;
  border-block: 1px solid var(--line);
}

.depth-summary p {
  position: relative;
  margin: 0;
  padding: 1.3rem 1.2rem 1.5rem 2.2rem;
}

.depth-summary p + p {
  border-left: 1px solid var(--line);
}

.depth-summary strong,
.depth-summary span {
  display: block;
}

.depth-summary strong {
  font-size: clamp(1.6rem, 3vw, 2.8rem);
  font-weight: 540;
  letter-spacing: -0.05em;
}

.depth-summary span {
  color: var(--muted);
  font-size: 0.7rem;
}

.depth-dot {
  position: absolute;
  top: 1.75rem;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.depth-dot.shallow { background: var(--ember); box-shadow: 0 0 10px var(--ember); }
.depth-dot.intermediate { background: var(--sulfur); box-shadow: 0 0 10px var(--sulfur); }
.depth-dot.deep { background: var(--violet); box-shadow: 0 0 10px var(--violet); }

.reset-view,
#reset-timeline {
  padding: 0.55rem 0.8rem;
  font-size: 0.7rem;
}

.reset-view:hover,
#reset-timeline:hover {
  color: var(--white);
  border-color: var(--white);
}

.region-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 1rem 0;
}

.region-chips button {
  padding: 0.45rem 0.68rem;
  font-size: 0.68rem;
}

.depth-stage {
  position: relative;
  min-height: 660px;
  height: 72svh;
  max-height: 850px;
  overflow: hidden;
  background: var(--black);
  border-block: 1px solid var(--line);
}

#depth-three {
  width: 100%;
  height: 100%;
  touch-action: none;
}

.depth-axis {
  position: absolute;
  top: 10%;
  bottom: 12%;
  left: 0.8rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.62rem;
  pointer-events: none;
}

.depth-hint {
  position: absolute;
  right: 1rem;
  bottom: 0.8rem;
  color: var(--muted);
  font-size: 0.65rem;
  pointer-events: none;
}

.depth-readout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}

.depth-readout p {
  margin: 0;
  padding: 1rem 1.2rem 1.15rem 0;
}

.depth-readout p + p {
  padding-left: 1.2rem;
  border-left: 1px solid var(--line);
}

.depth-readout span,
.depth-readout strong {
  display: block;
}

.depth-readout span {
  color: var(--muted);
  font-size: 0.63rem;
  text-transform: uppercase;
}

.depth-readout strong {
  margin-top: 0.15rem;
  font-size: 1rem;
  font-weight: 560;
}

.region-profile {
  width: min(1080px, 100%);
  display: grid;
  grid-template-columns: minmax(260px, 0.55fr) minmax(420px, 1fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
  margin: clamp(4.5rem, 9vw, 8rem) auto 0;
}

.region-profile-copy p {
  color: var(--muted);
}

#region-depth-chart {
  width: 100%;
  min-height: 520px;
  overflow: visible;
}

.magnitude-lab {
  padding-top: 1rem;
}

.fit-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.fit-label strong {
  color: var(--sulfur);
  font-size: 1.4rem;
  font-weight: 560;
}

.magnitude-control {
  padding: 2rem 0 1.3rem;
  border-bottom: 1px solid var(--line);
}

.magnitude-control label {
  display: block;
  margin-bottom: 1.5rem;
  color: var(--white-soft);
  font-size: 0.85rem;
}

.magnitude-control output {
  display: inline-block;
  min-width: 2.7em;
  margin: 0 0.2em;
  font-size: 1.25rem;
}

.magnitude-ticks {
  display: flex;
  justify-content: space-between;
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.6rem;
}

.magnitude-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.32fr);
  gap: 1px;
  min-height: 500px;
  border-bottom: 1px solid var(--line);
}

#magnitude-chart {
  width: 100%;
  height: 500px;
  padding: 1.5rem 2rem 1rem 0;
}

.magnitude-readout {
  border-left: 1px solid var(--line);
}

.magnitude-readout p {
  min-height: 33.333%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin: 0;
  padding: 1.5rem;
}

.magnitude-readout p + p {
  border-top: 1px solid var(--line);
}

.magnitude-readout span {
  color: var(--muted);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.magnitude-readout strong {
  margin-top: 0.35rem;
  color: var(--sulfur);
  font-size: clamp(1.8rem, 3.2vw, 3rem);
  font-weight: 540;
  letter-spacing: -0.05em;
  line-height: 1;
}

.energy-story {
  width: min(1080px, 100%);
  display: grid;
  grid-template-columns: minmax(280px, 0.65fr) minmax(430px, 1fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
  margin: clamp(5rem, 10vw, 9rem) auto 0;
}

.energy-copy p {
  color: var(--muted);
}

.energy-strip-wrap {
  min-width: 0;
}

#energy-strip {
  width: 100%;
}

.energy-key {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  margin-top: 0.8rem;
  color: var(--muted);
  font-size: 0.68rem;
}

.energy-key span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.energy-key i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.energy-key .top-two { background: var(--sulfur); }
.energy-key .next-eight { background: var(--ember); }
.energy-key .remainder { background: #333; }

.timeline-wrap {
  position: relative;
  height: 370px;
  margin-top: 1.5rem;
  border-block: 1px solid var(--line);
}

#daily-timeline {
  width: 100%;
  height: 100%;
}

.timeline-tooltip {
  position: absolute;
  z-index: 5;
  top: 0.8rem;
  left: 0.8rem;
  min-width: 140px;
  padding: 0.55rem 0.65rem;
  color: var(--white-soft);
  background: rgba(0, 0, 0, 0.92);
  border: 1px solid var(--line);
  font-size: 0.68rem;
  opacity: 0;
  pointer-events: none;
}

.timeline-tooltip.is-visible {
  opacity: 1;
}

.timeline-years {
  display: flex;
  justify-content: space-between;
  padding-top: 0.55rem;
  color: var(--muted);
  font-size: 0.6rem;
}

.event-explorer {
  width: min(1080px, 100%);
  display: grid;
  grid-template-columns: minmax(230px, 0.45fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 7vw, 7rem);
  margin: clamp(4.5rem, 9vw, 8rem) auto 0;
}

.event-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.event-list button {
  display: grid;
  grid-template-columns: 50px 1fr auto;
  align-items: center;
  gap: 0.7rem;
  width: 100%;
  padding: 0.65rem 0.75rem;
  text-align: left;
}

.event-list button strong {
  color: var(--sulfur);
  font-size: 0.9rem;
}

.event-list button.is-active strong {
  color: var(--black);
}

.event-list button span {
  overflow: hidden;
  font-size: 0.69rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.event-list button time {
  font-size: 0.62rem;
}

.event-detail {
  align-self: start;
  padding-top: 0.5rem;
}

.event-title {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 1.3rem;
  margin-top: 1rem;
}

.event-title > strong {
  color: var(--sulfur);
  font-size: clamp(3.2rem, 7vw, 6.8rem);
  font-weight: 520;
  letter-spacing: -0.07em;
  line-height: 0.85;
}

.event-date {
  color: var(--muted);
  font-size: 0.8rem;
}

.aftershock-bars {
  margin: 2.5rem 0 1.2rem;
}

.aftershock-bars p {
  display: grid;
  grid-template-columns: 95px 1fr 65px;
  align-items: center;
  gap: 1rem;
  margin: 0;
  padding: 0.65rem 0;
  border-top: 1px solid var(--line);
}

.aftershock-bars span {
  color: var(--muted);
  font-size: 0.68rem;
}

.aftershock-bars i {
  width: calc(var(--bar) * 100%);
  height: 5px;
  background: linear-gradient(90deg, var(--ember), var(--sulfur));
  box-shadow: 0 0 10px rgba(255, 75, 43, 0.35);
}

.aftershock-bars strong {
  color: var(--white-soft);
  font-size: 0.88rem;
  font-weight: 560;
  text-align: right;
}

.event-detail small {
  display: block;
  max-width: 680px;
  color: var(--muted);
  font-size: 0.68rem;
}

.field-guide {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 88% 18%, rgba(255, 75, 43, 0.1), transparent 28rem),
    var(--black);
}

.field-guide > header,
.field-guide-grid,
.field-guide-foot {
  width: min(var(--max-width), 100%);
  margin-right: auto;
  margin-left: auto;
}

.field-guide h2 {
  max-width: 940px;
}

.field-guide-intro {
  max-width: 720px;
  margin: 2rem 0 0;
  color: var(--white-soft);
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
}

.field-guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 5rem;
  border-top: 1px solid var(--line);
}

.field-card {
  position: relative;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: clamp(1.8rem, 3vw, 2.7rem);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  text-decoration: none;
  transition: background 220ms ease, border-color 220ms ease;
}

.field-card:nth-child(even) {
  border-right: 1px solid var(--line);
}

.field-card::after {
  content: "";
  position: absolute;
  right: -5rem;
  bottom: -7rem;
  width: 15rem;
  aspect-ratio: 1;
  border: 1px solid rgba(255, 75, 43, 0.16);
  border-radius: 50%;
  transition: border-color 220ms ease, transform 420ms ease;
}

.field-card:hover,
.field-card:focus-visible {
  background: rgba(255, 255, 255, 0.035);
  border-color: var(--line-strong);
}

.field-card:hover::after,
.field-card:focus-visible::after {
  border-color: rgba(255, 75, 43, 0.5);
  transform: scale(1.16);
}

.field-card-meta {
  color: var(--ember);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.field-card h3 {
  margin: 0.65rem 0 1.1rem;
  font-size: clamp(2rem, 3.3vw, 3.6rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 1;
}

.field-card p {
  position: relative;
  z-index: 1;
  max-width: 31rem;
  margin: 0 0 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.field-card strong {
  position: relative;
  z-index: 1;
  margin-top: auto;
  color: var(--white-soft);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.field-card strong span {
  display: inline-block;
  margin-left: 0.35rem;
  color: var(--ember);
  transition: transform 180ms ease;
}

.field-card:hover strong span {
  transform: translate(0.18rem, -0.18rem);
}

.field-guide-foot {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding-top: 2rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.field-guide-foot p {
  max-width: 560px;
  margin: 0;
}

.field-guide-foot a {
  color: var(--white-soft);
  text-decoration-color: var(--ember);
}

.noscript-note {
  position: fixed;
  z-index: 999;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  padding: 1rem;
  color: var(--white);
  background: #111;
  border: 1px solid var(--line-strong);
  font-size: 0.8rem;
}

.axis text,
.chart-label {
  fill: var(--muted);
  font-family: inherit;
  font-size: 11px;
}

.axis line,
.axis path,
.grid line {
  stroke: var(--line);
}

@media (max-width: 980px) {
  .hero-copy {
    left: 52%;
    width: min(760px, 76vw);
  }

  .hero-visual {
    inset: 0;
    opacity: 1;
  }

  .corridor-result {
    grid-template-columns: 1fr 1fr;
  }

  #corridor-share-chart {
    grid-column: 1 / -1;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .subduction-scrolly {
    grid-template-columns: minmax(0, 1.35fr) minmax(240px, 0.65fr);
    gap: 2rem;
  }

  .region-profile,
  .energy-story {
    grid-template-columns: 1fr;
  }

  .region-profile-copy,
  .energy-copy {
    max-width: 680px;
  }
}

@media (max-width: 760px) {
  body {
    font-size: 17px;
  }

  .story-nav {
    grid-template-columns: auto 1fr;
    gap: 1rem;
    padding: 0 1rem;
  }

  .story-nav-links {
    justify-content: flex-end;
    gap: 1rem;
  }

  .story-nav-year {
    display: none;
  }

  .hero {
    min-height: max(740px, 100svh);
  }

  .hero-visual {
    inset: 3.5rem auto auto 50%;
    width: min(170vw, 900px);
    height: auto;
    aspect-ratio: 2593 / 1621;
    opacity: 1;
    transform: translateX(-50%);
  }

  .hero-visual::before {
    background:
      radial-gradient(ellipse at 53% 47%, rgba(0, 0, 0, 0.2) 0, rgba(0, 0, 0, 0.08) 32%, transparent 58%),
      linear-gradient(180deg, rgba(0, 0, 0, 0.16), transparent 24%, rgba(0, 0, 0, 0.08) 60%, #000 100%);
  }

  .hero-visual img {
    object-fit: contain;
    object-position: center;
  }

  .scroll-cue {
    display: none;
  }

  .hero-copy {
    top: clamp(7.8rem, 18svh, 9.5rem);
    left: 50%;
    width: calc(100% - 2.3rem);
    transform: translateX(-50%);
  }

  .eyebrow {
    gap: 0.8rem;
    margin-bottom: 1.1rem;
    font-size: 0.63rem;
    letter-spacing: 0.12em;
  }

  .eyebrow span + span {
    padding-left: 0.8rem;
  }

  .hero h1 {
    font-size: clamp(2.5rem, 12vw, 4.9rem);
    white-space: nowrap;
  }

  .hero-lede {
    max-width: 34rem;
    margin: 1.5rem auto 1.8rem;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: 100%;
  }

  .hero-stats p {
    min-width: 0;
    padding: 0.75rem 0.6rem 0.85rem 0;
  }

  .hero-stats p + p {
    padding-left: 0.6rem;
  }

  .hero-stats strong {
    font-size: 0.98rem;
  }

  .hero-stats span {
    font-size: 0.55rem;
  }

  .opening,
  .chapter,
  .field-guide {
    padding-right: 1.15rem;
    padding-left: 1.15rem;
  }

  .opening-grid,
  .opening-ledger,
  .volcano-ledger,
  .event-explorer,
  .field-guide-grid {
    grid-template-columns: 1fr;
  }

  .opening-ledger article {
    min-height: 170px;
    padding-left: 0;
  }

  .opening-ledger article + article {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .opening-ledger strong {
    margin-top: 2rem;
  }

  .scope-switch {
    width: 100%;
  }

  .scope-switch button {
    flex: 1;
  }

  .lab-topline {
    flex-direction: column;
    align-items: stretch;
  }

  .corridor-map-wrap {
    aspect-ratio: 1.16;
  }

  .corridor-controls {
    grid-template-columns: 1fr;
    row-gap: 1rem;
  }

  .range-row {
    grid-template-columns: 1fr 82px;
  }

  .range-ticks {
    grid-column: 1;
    padding-right: 99px;
  }

  .corridor-result {
    grid-template-columns: 1fr;
  }

  .corridor-result p + p,
  #corridor-share-chart {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .finding {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .subduction-scrolly {
    display: block;
  }

  .subduction-sticky {
    top: var(--nav-height);
    z-index: 2;
    height: 58svh;
    min-height: 390px;
    background: var(--black);
  }

  .subduction-steps {
    position: relative;
    z-index: 3;
    padding: 0 0 30svh;
  }

  .subduction-step {
    min-height: 55svh;
    align-content: end;
    margin: 0 0 28svh;
    padding: 1rem;
    color: var(--white-soft);
    background: rgba(0, 0, 0, 0.88);
    border: 1px solid var(--line);
  }

  .subduction-diagram .diagram-labels text {
    font-size: 22px;
  }

  .depth-summary,
  .depth-readout {
    grid-template-columns: 1fr;
  }

  .depth-summary p + p,
  .depth-readout p + p {
    padding-left: 2.2rem;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .depth-readout p + p {
    padding-left: 0;
  }

  .depth-stage {
    min-height: 510px;
    height: 66svh;
  }

  .magnitude-layout {
    grid-template-columns: 1fr;
  }

  #magnitude-chart {
    height: 420px;
    padding-right: 0;
  }

  .magnitude-readout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .magnitude-readout p {
    min-height: 140px;
    padding: 1rem;
  }

  .magnitude-readout p + p {
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .magnitude-readout strong {
    font-size: 1.45rem;
  }

  .event-list {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 0.6rem;
  }

  .event-list button {
    flex: 0 0 240px;
  }

  .event-title {
    grid-template-columns: 1fr;
  }

  .field-card {
    min-height: 280px;
    border-right: 1px solid var(--line);
  }

  .field-guide-foot {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .story-nav-links a {
    font-size: 0.61rem;
  }

  .story-nav-links a:nth-child(2),
  .story-nav-links a:nth-child(4) {
    display: none;
  }

  .hero-lede {
    font-size: 1rem;
  }

  .chapter h2,
  .field-guide h2 {
    font-size: 2.65rem;
  }

  .magnitude-readout {
    grid-template-columns: 1fr;
  }

  .magnitude-readout p + p {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .aftershock-bars p {
    grid-template-columns: 75px 1fr 55px;
    gap: 0.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}