/* ============================================================
   TERRA RHYTHM — scrollytelling data essay
   Palette: dust #D8C3A5 · deep soil #4A3728 · rain #2E6E8E
            young green #7FA653 · storm slate #3B4252
   Chart-duty variants (validated): blue #1F719F · green #5E8032
   Dark-stage blue (validated): #4899CE
   Type: Gelasio (essay serif) + Rubik (annotations)
   ============================================================ */

@font-face {
  font-family: 'Gelasio';
  src: url('../fonts/gelasio.woff2') format('woff2');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Gelasio';
  src: url('../fonts/gelasio-italic.woff2') format('woff2');
  font-weight: 400 700;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Rubik';
  src: url('../fonts/rubik.woff2') format('woff2');
  font-weight: 300 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #EFE6D0;
  --paper-soft: #E8DCC2;
  --dust: #D8C3A5;
  --dust-deep: #C0A67F;
  --soil: #4A3728;
  --soil-soft: #6E5843;
  --soil-faint: #8a755f;
  --rain: #2E6E8E;
  --green: #7FA653;
  --slate: #3B4252;
  --slate-deep: #313846;
  --slate-ink: #E9DFC8;
  --chart-blue: #1F719F;
  --chart-green: #5E8032;
  --chart-blue-dark: #4899CE;
  --grid: rgba(74, 55, 40, 0.16);
  --hairline: rgba(74, 55, 40, 0.22);
  --serif: 'Gelasio', Georgia, 'Times New Roman', serif;
  --sans: 'Rubik', 'Segoe UI', system-ui, sans-serif;
  --measure: 33rem;
  --headh: 3.4rem;
  --pad: clamp(1.1rem, 4vw, 4rem);
  --fs-prose: clamp(1.05rem, 0.97rem + 0.35vw, 1.24rem);
  --ease: cubic-bezier(.33, .01, .17, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--soil);
  font-family: var(--serif);
  font-size: var(--fs-prose);
  line-height: 1.66;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--rain); color: var(--paper); }

:focus-visible {
  outline: 3px solid var(--rain);
  outline-offset: 3px;
  border-radius: 2px;
}
.on-dark :focus-visible, .title-scene :focus-visible { outline-color: var(--slate-ink); }

@supports (scrollbar-color: red blue) {
  html { scrollbar-color: var(--dust-deep) var(--paper-soft); }
}

a { color: inherit; }

.skip {
  position: fixed;
  top: -4rem;
  left: 1rem;
  z-index: 200;
  background: var(--soil);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 0.85rem;
  padding: 0.6rem 1rem;
  border-radius: 0 0 6px 6px;
  text-decoration: none;
  transition: top 0.15s;
}
.skip:focus-visible { top: 0; }

/* ---------- header ---------- */
.site-head {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--headh);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-inline: var(--pad);
  font-family: var(--sans);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(74, 55, 40, 0.12);
}
.site-head.over-dark {
  background: color-mix(in srgb, var(--slate) 76%, transparent);
  color: var(--slate-ink);
  border-bottom-color: rgba(233, 223, 200, 0.14);
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.wordmark svg { display: block; }
.site-nav { display: flex; gap: clamp(0.7rem, 2.4vw, 1.6rem); }
.site-nav a {
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  opacity: 0.82;
  padding-block: 0.35rem;
  border-bottom: 2px solid transparent;
  transition: opacity 0.2s, border-color 0.2s;
}
@media (hover: hover) and (pointer: fine) {
  .site-nav a:hover { opacity: 1; border-bottom-color: currentColor; }
  .wordmark:hover svg { transform: rotate(30deg); }
  .wordmark svg { transition: transform 0.45s var(--ease); }
}
@media (max-width: 640px) {
  .site-nav a.hide-s { display: none; }
  .site-head { gap: 0.6rem; }
  .wordmark { font-size: 0.8rem; letter-spacing: 0.1em; white-space: nowrap; }
  .site-nav { gap: 0.7rem; }
  .site-nav a { font-size: 0.7rem; letter-spacing: 0.06em; white-space: nowrap; }
}

/* ---------- title scene ---------- */
.title-scene {
  position: relative;
  min-height: 100svh;
  background:
    radial-gradient(120% 90% at 50% 110%, rgba(46, 110, 142, 0.35), transparent 60%),
    var(--slate);
  color: var(--slate-ink);
  display: grid;
  place-items: center;
  overflow: hidden;
  text-align: center;
  padding: calc(var(--headh) + 3rem) var(--pad) 5rem;
}
.title-inner { position: relative; z-index: 3; max-width: 60rem; }
.title-kicker {
  font-family: var(--sans);
  font-size: clamp(0.72rem, 0.65rem + 0.3vw, 0.88rem);
  font-weight: 500;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--dust);
  margin-bottom: 1.6rem;
}
h1 {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 600;
  font-size: clamp(3rem, 1.4rem + 9.5vw, 8rem);
  line-height: 1.02;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
h1 .rainword { color: #9ec8de; font-style: italic; }
.title-dek {
  max-width: 42ch;
  margin: 2rem auto 0;
  font-size: clamp(1.05rem, 1rem + 0.5vw, 1.4rem);
  line-height: 1.55;
  color: color-mix(in srgb, var(--slate-ink) 88%, transparent);
  text-wrap: balance;
}
.title-byline {
  margin-top: 2.4rem;
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--slate-ink) 62%, transparent);
}
.title-byline strong { font-weight: 600; color: var(--dust); }
.illustrative-flag {
  display: inline-block;
  margin-top: 1.5rem;
  font-family: var(--sans);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--slate);
  background: var(--dust);
  padding: 0.35rem 0.8rem;
  border-radius: 99px;
  text-decoration: none;
}
@media (hover: hover) { .illustrative-flag:hover { background: var(--paper); } }

.ghost-wheel {
  position: absolute;
  z-index: 1;
  width: min(150vmin, 1100px);
  height: min(150vmin, 1100px);
  left: 50%;
  top: 50%;
  translate: -50% -50%;
  opacity: 0.14;
  animation: slow-turn 140s linear infinite;
}
@keyframes slow-turn { to { rotate: 360deg; } }

.rainfield { position: absolute; inset: 0; z-index: 2; pointer-events: none; }
.rainfield line {
  stroke: #7fa9c1;
  stroke-width: 1.4;
  stroke-linecap: round;
  opacity: 0.5;
  animation: rainfall var(--dur, 1.4s) linear infinite;
  animation-delay: var(--del, 0s);
}
@keyframes rainfall {
  from { transform: translateY(-16%); }
  to { transform: translateY(112%); }
}

.scroll-cue {
  position: absolute;
  bottom: 1.6rem;
  left: 50%;
  translate: -50%;
  z-index: 4;
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--slate-ink) 66%, transparent);
  display: grid;
  justify-items: center;
  gap: 0.5rem;
  text-decoration: none;
}
.scroll-cue::after {
  content: "";
  width: 1px;
  height: 2.4rem;
  background: linear-gradient(var(--dust), transparent);
  animation: cue-drip 2.2s var(--ease) infinite;
}
@keyframes cue-drip {
  0% { transform: scaleY(0); transform-origin: top; }
  55% { transform: scaleY(1); transform-origin: top; }
  56% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- act break bands ---------- */
.act-break {
  position: relative;
  background: var(--dust);
  color: var(--soil);
  padding: clamp(4rem, 10vh, 7rem) var(--pad);
  overflow: hidden;
  border-block: 1px solid rgba(74, 55, 40, 0.18);
}
.act-break .inner {
  max-width: 68rem;
  margin-inline: auto;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(1.4rem, 4vw, 3rem);
  align-items: center;
}
.act-num {
  font-family: var(--sans);
  font-weight: 300;
  font-size: clamp(3.4rem, 8vw, 6.4rem);
  line-height: 1;
  color: var(--rain);
  font-variant-numeric: proportional-nums;
}
.act--city-break .act-num, .act--future-break .act-num { color: var(--slate); }
.act--farm-break .act-num { color: var(--chart-green); }
.act-break h2 {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 600;
  font-size: clamp(1.9rem, 1.3rem + 3.4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
.act-break .dek {
  margin-top: 0.8rem;
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.2rem);
  color: var(--soil-soft);
  max-width: 52ch;
  text-wrap: pretty;
}
.act-break .motif {
  position: absolute;
  right: -3rem;
  top: 50%;
  translate: 0 -50%;
  width: clamp(11rem, 24vw, 19rem);
  opacity: 0.35;
  pointer-events: none;
}

/* ---------- scrollytelling zones ---------- */
.zone { position: relative; }
.zone-grid {
  display: grid;
  grid-template-columns: minmax(19rem, 27rem) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4.5rem);
  padding-inline: var(--pad);
  max-width: 96rem;
  margin-inline: auto;
}
.stage {
  grid-column: 2;
  grid-row: 1;
  position: sticky;
  top: 0;
  height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.9rem;
  padding-block: calc(var(--headh) + 0.6rem) 1rem;
  min-width: 0;
}
.stage figure { width: 100%; margin: 0; }
.stage figure svg {
  width: 100%;
  height: auto;
  max-height: calc(100svh - 12rem);
  display: block;
}
.takeaway {
  font-family: var(--sans);
  font-size: clamp(0.88rem, 0.84rem + 0.2vw, 1rem);
  font-weight: 500;
  line-height: 1.5;
  color: var(--soil);
  max-width: 52ch;
  padding-left: 0.9rem;
  border-left: 3px solid var(--rain);
  min-height: 3.2em;
  transition: opacity 0.35s;
}
.takeaway.swap { opacity: 0; }
.act--farm .takeaway { border-left-color: var(--chart-green); }
.act--city .takeaway { border-left-color: var(--chart-blue-dark); color: var(--slate-ink); }
.act--future .takeaway { border-left-color: var(--slate); }

.steps { grid-column: 1; grid-row: 1; position: relative; z-index: 6; }
.step {
  min-height: 92svh;
  display: flex;
  align-items: center;
  opacity: 0.3;
  transition: opacity 0.45s var(--ease);
}
.step.is-active { opacity: 1; }
.step-card { padding-block: 3rem; max-width: var(--measure); }
.step-kicker {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--rain);
  margin-bottom: 0.9rem;
}
.act--farm .step-kicker { color: var(--chart-green); }
.act--city .step-kicker { color: var(--chart-blue-dark); }
.act--future .step-kicker { color: var(--soil-soft); }
.step h3 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.35rem, 1.2rem + 0.9vw, 1.9rem);
  line-height: 1.2;
  margin-bottom: 0.9rem;
  letter-spacing: -0.005em;
  text-wrap: balance;
}
.step p + p { margin-top: 0.9em; }
.step em { font-style: italic; }
.step .note {
  margin-top: 1.1em;
  font-family: var(--sans);
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--soil-faint);
}
.act--city .step .note { color: color-mix(in srgb, var(--slate-ink) 62%, transparent); }

/* first paragraph drop cap, act I step 1 only */
.dropcap::first-letter {
  float: left;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 700;
  font-size: 3.6em;
  line-height: 0.82;
  padding: 0.06em 0.12em 0 0;
  color: var(--rain);
}

/* dark act (the city) */
.act--city { background: var(--slate); color: var(--slate-ink); }
.act--city .step { color: color-mix(in srgb, var(--slate-ink) 94%, transparent); }
.act--city ::selection { background: var(--dust); color: var(--slate); }

/* ---------- SVG chart building blocks ---------- */
.chart-title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 15px;
  fill: var(--soil);
  letter-spacing: 0.01em;
}
.chart-sub { font-family: var(--sans); font-size: 12px; fill: var(--soil-faint); }
.axis-label, .tick-label {
  font-family: var(--sans);
  font-size: 11.5px;
  fill: var(--soil-soft);
  font-variant-numeric: tabular-nums;
}
.axis-title {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  fill: var(--soil-faint);
}
.gridline { stroke: var(--grid); stroke-width: 1; fill: none; }
.axisline { stroke: var(--hairline); stroke-width: 1; fill: none; }
.ann-label {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  fill: var(--soil);
}
.ann-strong { font-weight: 600; }
.leader { stroke: var(--soil-soft); stroke-width: 1; fill: none; }
.legend-label { font-family: var(--sans); font-size: 12px; fill: var(--soil); }

.act--city .chart-title, .act--city .ann-label { fill: var(--slate-ink); }
.act--city .chart-sub { fill: color-mix(in srgb, var(--slate-ink) 62%, transparent); }
.act--city .axis-label, .act--city .tick-label,
.act--city .axis-title { fill: color-mix(in srgb, var(--slate-ink) 72%, transparent); }
.act--city .gridline { stroke: rgba(233, 223, 200, 0.14); }
.act--city .axisline { stroke: rgba(233, 223, 200, 0.28); }
.act--city .leader { stroke: rgba(233, 223, 200, 0.55); }
.act--city .legend-label { fill: var(--slate-ink); }

/* annotation layers toggled by stage data-step */
.ann { opacity: 0; transition: opacity 0.5s var(--ease) 0.25s; }
[data-step="1"] .s1, [data-step="2"] .s2, [data-step="3"] .s3,
[data-step="4"] .s4, [data-step="5"] .s5 { opacity: 1; }
/* cumulative layers: visible from step N onward */
[data-step="2"] .from2, [data-step="3"] .from2, [data-step="4"] .from2, [data-step="5"] .from2,
[data-step="3"] .from3, [data-step="4"] .from3, [data-step="5"] .from3,
[data-step="4"] .from4, [data-step="5"] .from4,
[data-step="5"] .from5 { opacity: 1; }

/* ---------- act I : the wheel ---------- */
.wheel-bar {
  fill: var(--chart-blue);
  stroke: var(--chart-blue);
  stroke-width: 2.5;
  stroke-linejoin: round;
  transition: opacity 0.5s var(--ease), fill 0.5s, stroke 0.5s;
}
[data-step="3"] .wheel-bar.offpeak { opacity: 0.3; }
[data-step="4"] .wheel-bar { fill: color-mix(in srgb, var(--chart-blue) 42%, var(--paper)); stroke: color-mix(in srgb, var(--chart-blue) 42%, var(--paper)); }
.tamale-ring {
  fill: none;
  stroke: var(--chart-green);
  stroke-width: 2.5;
  stroke-linejoin: round;
  stroke-linecap: round;
}
.tamale-dot { fill: var(--chart-green); stroke: var(--paper); stroke-width: 2; }
.wheel-center-num {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 34px;
  fill: var(--soil);
}
.wheel-center-cap {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  fill: var(--soil-faint);
}
.month-label {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 500;
  fill: var(--soil-soft);
  letter-spacing: 0.06em;
}
.month-label.peak-month { fill: var(--soil); font-weight: 600; }

/* ---------- act II : the front (map) ---------- */
.map-ocean { fill: #c9d3cf; }
.map-land { fill: var(--dust); stroke: var(--soil-soft); stroke-width: 1.2; }
.map-sahara { fill: url(#saharaHatch); opacity: 0.5; }
.map-city { fill: var(--soil); stroke: var(--paper); stroke-width: 1.5; }
.map-city-label { font-family: var(--sans); font-size: 11.5px; font-weight: 500; fill: var(--soil); }
.map-geo-label {
  font-family: var(--sans);
  font-size: 11px;
  font-style: normal;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  fill: var(--soil-faint);
}
.map-sea-label { fill: #5b7570; }
.front-line {
  fill: none;
  stroke: var(--slate);
  stroke-width: 3;
  stroke-linecap: round;
}
.rain-belt { fill: var(--chart-blue); fill-opacity: 0.3; }
.rain-belt-sea { fill: var(--chart-blue); fill-opacity: 0.12; }
.wet-wash { fill: var(--chart-blue); fill-opacity: 0.08; }
.wind-arrow { stroke-width: 2; fill: none; stroke-linecap: round; }
.wind-arrow.moist { stroke: var(--chart-blue); }
.wind-arrow.dry { stroke: #a5773f; }
.wind-head.moist { fill: var(--chart-blue); }
.wind-head.dry { fill: #a5773f; }
.wind-label { font-family: var(--sans); font-size: 11px; font-weight: 600; letter-spacing: 0.08em; }
.month-readout {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 30px;
  letter-spacing: 0.12em;
  fill: var(--slate);
}
.front-tag {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  fill: var(--slate);
}
.crossmark { fill: none; stroke: var(--soil); stroke-width: 2; stroke-linecap: round; }

/* ---------- act III : farm calendar ---------- */
.rain-context {
  fill: none;
  stroke: var(--chart-blue);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.rain-context-fill { fill: var(--chart-blue); opacity: 0.1; }
.gantt-bar { fill: var(--chart-green); rx: 4; transition: transform 0.7s var(--ease), opacity 0.5s; transform-origin: left center; transform-box: fill-box; }
.gantt-bar.pending { transform: scaleX(0); opacity: 0; }
.gantt-label { font-family: var(--sans); font-size: 12px; fill: var(--soil); font-weight: 500; }
.gantt-side { font-family: var(--sans); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; fill: var(--soil-faint); }
.pause-band { fill: var(--dust-deep); fill-opacity: 0.35; }
.north-band { fill: var(--slate); fill-opacity: 0.08; }

/* ---------- act IV : the city (dark) ---------- */
.hyeto-bar {
  fill: var(--chart-blue-dark);
  transform-origin: bottom;
  transform-box: fill-box;
  transition: transform 0.8s var(--ease), opacity 0.5s;
}
.hyeto-bar.pending { transform: scaleY(0); }
.hyeto-bar.over { fill: #a7d3ee; }
.hyeto-bar.over.pending { transform: scaleY(0); opacity: 0; }
.capacity-line { stroke: var(--dust); stroke-width: 2; stroke-dasharray: 7 6; fill: none; }
.capacity-label { font-family: var(--sans); font-size: 12px; font-weight: 600; fill: var(--dust); }
.skyline { fill: var(--slate-deep); }
.skyline-window { fill: rgba(233, 223, 200, 0.25); }
.spill-hatch { stroke: #a7d3ee; stroke-width: 1.4; opacity: 0.65; }
.city-rain line {
  stroke: rgba(160, 205, 233, 0.45);
  stroke-width: 1.2;
  stroke-linecap: round;
  animation: city-rain 1.3s linear infinite;
  animation-delay: var(--del, 0s);
}
@keyframes city-rain {
  0% { transform: translateY(-46px); opacity: 0; }
  12% { opacity: 1; }
  82% { opacity: 1; }
  100% { transform: translateY(64px); opacity: 0; }
}

/* ---------- act V : the future ---------- */
.onset-dot {
  fill: var(--chart-blue);
  stroke: var(--paper);
  stroke-width: 2;
  transition: opacity 0.4s var(--ease) var(--del, 0s), transform 0.4s var(--ease) var(--del, 0s);
}
.onset-dot.pending { opacity: 0; transform: translateY(8px); }
.spread-band { fill: var(--slate); opacity: 0.14; }
.spread-mid { stroke: var(--slate); stroke-width: 2; fill: none; stroke-linecap: round; }

/* line draw-in (dashoffset) */
.drawline { transition: stroke-dashoffset 1.6s var(--ease); }
.drawline.pending { }

/* ---------- prose interludes / method / colophon ---------- */
.prose-band { padding: clamp(4rem, 11vh, 8rem) var(--pad); }
.prose-band .inner { max-width: 46rem; margin-inline: auto; }
.prose-band h2 {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 600;
  font-size: clamp(1.9rem, 1.4rem + 2.6vw, 3.2rem);
  line-height: 1.12;
  margin-bottom: 1.4rem;
  letter-spacing: -0.01em;
}
.prose-band p + p { margin-top: 1em; }
.prose-band .kicker {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--rain);
  margin-bottom: 1rem;
}
.method { background: var(--paper-soft); border-block: 1px solid rgba(74, 55, 40, 0.14); }
.method-callout {
  margin-block: 1.6rem;
  padding: 1.2rem 1.4rem;
  background: var(--paper);
  border: 1px solid var(--dust-deep);
  border-left: 4px solid var(--rain);
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 0.92rem;
  line-height: 1.6;
}

.data-tables { margin-top: 2.2rem; display: grid; gap: 0.8rem; }
details.tableblock {
  border: 1px solid var(--dust-deep);
  border-radius: 8px;
  background: var(--paper);
  overflow: hidden;
}
details.tableblock summary {
  cursor: pointer;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.85rem 1.1rem;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
details.tableblock summary::-webkit-details-marker { display: none; }
details.tableblock summary::before {
  content: "+";
  font-weight: 600;
  color: var(--rain);
  width: 1em;
}
details.tableblock[open] summary::before { content: "–"; }
@media (hover: hover) { details.tableblock summary:hover { background: var(--paper-soft); } }
.tablewrap { overflow-x: auto; padding: 0 1.1rem 1.1rem; }
.tableblock table {
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 0.82rem;
  min-width: 100%;
}
.tableblock caption {
  text-align: left;
  font-size: 0.78rem;
  color: var(--soil-faint);
  padding-bottom: 0.5rem;
}
.tableblock th, .tableblock td {
  text-align: right;
  padding: 0.4rem 0.55rem;
  border-bottom: 1px solid rgba(74, 55, 40, 0.12);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.tableblock th { font-weight: 600; color: var(--soil-soft); }
.tableblock th:first-child, .tableblock td:first-child { text-align: left; }

/* ---------- colophon ---------- */
.colophon {
  background: var(--slate);
  color: var(--slate-ink);
  padding: clamp(4rem, 10vh, 7rem) var(--pad) 3rem;
}
.colophon .inner { max-width: 68rem; margin-inline: auto; }
.colophon h2 {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 600;
  font-size: clamp(1.8rem, 1.3rem + 2.4vw, 3rem);
  margin-bottom: 2.4rem;
}
.colo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 2.4rem clamp(1.5rem, 4vw, 3.5rem);
}
.colo-grid h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--dust);
  margin-bottom: 0.9rem;
}
.colo-grid p, .colo-grid li {
  font-family: var(--sans);
  font-size: 0.92rem;
  line-height: 1.65;
  color: color-mix(in srgb, var(--slate-ink) 84%, transparent);
}
.colo-grid ul { list-style: none; }
.colo-grid li + li { margin-top: 0.45rem; }
.colo-grid a { color: var(--slate-ink); text-decoration-color: color-mix(in srgb, var(--slate-ink) 45%, transparent); text-underline-offset: 3px; transition: text-decoration-color 0.2s; }
@media (hover: hover) { .colo-grid a:hover { text-decoration-color: var(--dust); } }
.swatches { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.4rem; }
.swatch {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  border: 2px solid rgba(233, 223, 200, 0.4);
  display: inline-block;
}
.credit-line {
  margin-top: 3.5rem;
  padding-top: 1.6rem;
  border-top: 1px solid rgba(233, 223, 200, 0.18);
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 2rem;
  justify-content: space-between;
  font-family: var(--sans);
  font-size: 0.84rem;
  color: color-mix(in srgb, var(--slate-ink) 72%, transparent);
}
.credit-line a { color: var(--slate-ink); text-underline-offset: 3px; }

/* ---------- act rail (desktop progress) ---------- */
.act-rail {
  position: fixed;
  right: 1.1rem;
  top: 50%;
  translate: 0 -50%;
  z-index: 90;
  display: grid;
  gap: 0.9rem;
  font-family: var(--sans);
}
.act-rail a {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--soil-faint);
  text-decoration: none;
  border: 1.5px solid transparent;
  border-radius: 50%;
  transition: color 0.25s, border-color 0.25s, background 0.25s;
}
.act-rail a.is-here { color: var(--paper); background: var(--rain); border-color: var(--rain); }
@media (hover: hover) { .act-rail a:hover:not(.is-here) { border-color: var(--soil-faint); } }
body.rail-dark .act-rail a { color: color-mix(in srgb, var(--slate-ink) 70%, transparent); }
body.rail-dark .act-rail a.is-here { color: var(--slate); background: var(--dust); border-color: var(--dust); }
@media (max-width: 1100px) { .act-rail { display: none; } }

/* ---------- mobile / tablet stacking ---------- */
@media (max-width: 880px) {
  :root { --headh: 3rem; }
  .zone-grid { display: block; padding-inline: 0; }
  .stage {
    position: sticky;
    top: 0;
    z-index: 20;
    height: auto;
    min-height: 0;
    padding: calc(var(--headh) + 0.5rem) var(--pad) 0.8rem;
    background: var(--paper);
    border-bottom: 1px solid rgba(74, 55, 40, 0.18);
    box-shadow: 0 10px 24px -18px rgba(59, 66, 82, 0.55);
    justify-content: flex-start;
  }
  .act--city .stage { background: var(--slate); border-bottom-color: rgba(233, 223, 200, 0.2); }
  .stage figure svg { max-height: 42svh; }
  .takeaway { min-height: 0; font-size: 0.84rem; }
  .steps { padding: 0 var(--pad); position: relative; z-index: 1; }
  .step { min-height: 72svh; }
  .step-card { padding-block: 2.4rem; }
  /* charts render ~0.55× on a 390px screen: bump SVG text (viewBox units) */
  .chart-title { font-size: 21px; }
  .chart-sub { font-size: 16px; }
  .axis-label, .tick-label { font-size: 15.5px; }
  .axis-title { font-size: 15px; }
  .ann-label, .legend-label { font-size: 16.5px; }
  .month-label { font-size: 17px; }
  .map-city-label { font-size: 16px; }
  .map-geo-label { font-size: 15px; }
  .wind-label, .front-tag, .capacity-label { font-size: 15.5px; }
  .gantt-label { font-size: 14px; }
  .gantt-side { font-size: 14px; }
  .wheel-center-num { font-size: 40px; }
  .wheel-center-cap { font-size: 14px; }
  .act-break .inner { grid-template-columns: 1fr; gap: 0.6rem; }
  .act-break .motif { opacity: 0.18; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
  .step { opacity: 1; }
  .ghost-wheel { animation: none; }
  .rainfield, .city-rain { display: none; }
  .scroll-cue::after { animation: none; transform: none; }
  .gantt-bar.pending, .onset-dot.pending, .hyeto-bar.pending { transform: none; opacity: 1; }
}

/* no-JS: show everything at final state */
.no-js .step { opacity: 1; }
.no-js .ann { opacity: 1; }

/* ============================================================
   subpages (/guide, /process)
   ============================================================ */
.page-hero {
  background:
    radial-gradient(110% 80% at 50% 120%, rgba(46, 110, 142, 0.3), transparent 60%),
    var(--slate);
  color: var(--slate-ink);
  padding: calc(var(--headh) + clamp(3rem, 9vh, 6rem)) var(--pad) clamp(3rem, 8vh, 5rem);
  text-align: center;
}
.page-hero .kicker {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.74rem;
  letter-spacing: 0.38em;
  text-transform: uppercase;
  color: var(--dust);
  margin-bottom: 1.2rem;
}
.page-hero h1 {
  font-size: clamp(2.4rem, 1.6rem + 4.6vw, 4.6rem);
  font-weight: 600;
}
.page-hero .dek {
  max-width: 52ch;
  margin: 1.4rem auto 0;
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.25rem);
  color: color-mix(in srgb, var(--slate-ink) 86%, transparent);
  text-wrap: balance;
}
.article {
  max-width: 47rem;
  margin-inline: auto;
  padding: clamp(3rem, 7vh, 5rem) var(--pad) 4rem;
}
.article > section + section { margin-top: clamp(3rem, 7vh, 4.5rem); }
.article h2 {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 600;
  font-size: clamp(1.7rem, 1.35rem + 1.6vw, 2.5rem);
  line-height: 1.15;
  margin-bottom: 1.1rem;
  letter-spacing: -0.01em;
}
.article h2 .secnum {
  font-family: var(--sans);
  font-style: normal;
  font-weight: 300;
  font-size: 0.62em;
  color: var(--rain);
  margin-right: 0.5rem;
  vertical-align: 0.12em;
}
.article h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  margin: 1.8rem 0 0.6rem;
}
.article p + p { margin-top: 0.9em; }
.article ul { padding-left: 1.2rem; margin-block: 0.8em; }
.article li { margin-block: 0.45em; }
.article li::marker { color: var(--rain); }
.article a { text-decoration-color: color-mix(in srgb, var(--soil) 40%, transparent); text-underline-offset: 3px; }
@media (hover: hover) { .article a:hover { text-decoration-color: var(--rain); } }
.article code {
  font-family: ui-monospace, 'Cascadia Code', Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: rgba(74, 55, 40, 0.08);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}
.article pre {
  background: var(--slate);
  color: var(--slate-ink);
  border-radius: 10px;
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  margin-block: 1.2rem;
  font-size: 0.8rem;
  line-height: 1.6;
  border: 1px solid var(--slate-deep);
}
.article pre code { background: none; padding: 0; font-size: 1em; color: inherit; }
.article pre .c { color: #9aa5b8; } /* comment tint */
.callout {
  margin-block: 1.4rem;
  padding: 1.1rem 1.3rem;
  background: var(--paper-soft);
  border: 1px solid var(--dust-deep);
  border-left: 4px solid var(--rain);
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 0.92rem;
  line-height: 1.6;
}
.callout.green { border-left-color: var(--chart-green); }
.passlog { display: grid; gap: 1rem; margin-top: 1.4rem; }
.pass {
  background: var(--paper-soft);
  border: 1px solid var(--dust-deep);
  border-radius: 10px;
  padding: 1.2rem 1.4rem;
}
.pass h3 { margin-top: 0; display: flex; align-items: baseline; gap: 0.6rem; }
.pass h3 .passnum {
  font-family: var(--sans);
  font-weight: 300;
  font-size: 1.6rem;
  color: var(--rain);
}
.pass ul { margin-bottom: 0; font-family: var(--sans); font-size: 0.9rem; line-height: 1.6; }
.spec-list {
  font-family: var(--sans);
  font-size: 0.9rem;
  display: grid;
  gap: 0.5rem;
  margin-block: 1rem;
}
.spec-list div {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid rgba(74, 55, 40, 0.14);
}
.spec-list dt { font-weight: 600; color: var(--soil-soft); }
.spec-list dd { margin: 0; }
@media (max-width: 560px) { .spec-list div { grid-template-columns: 1fr; gap: 0.15rem; } }
.pal-chips { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-block: 1rem; font-family: var(--sans); font-size: 0.78rem; }
.pal-chips span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.7rem 0.35rem 0.4rem;
  border: 1px solid var(--dust-deep);
  border-radius: 99px;
  background: var(--paper-soft);
}
.pal-chips i {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  display: inline-block;
  border: 1px solid rgba(74, 55, 40, 0.25);
}
.subfoot {
  background: var(--slate);
  color: var(--slate-ink);
  padding: 2.2rem var(--pad);
  font-family: var(--sans);
  font-size: 0.86rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 2rem;
  justify-content: center;
  text-align: center;
}
.subfoot a { color: var(--slate-ink); text-underline-offset: 3px; }
.pagenav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: center;
  margin-top: 2rem;
}
.pagenav a {
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: 1.5px solid color-mix(in srgb, var(--slate-ink) 45%, transparent);
  color: var(--slate-ink);
  border-radius: 99px;
  padding: 0.55rem 1.2rem;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
@media (hover: hover) {
  .pagenav a:hover { background: var(--dust); color: var(--slate); border-color: var(--dust); }
}