/* ─────────────────────────────────────────────────────────────────────────
   ERI Methodology — extends styles.css
   A technical brief: denser than a manifesto, lighter than a paper.
   ───────────────────────────────────────────────────────────────────────── */

.meth-page {
  padding-top: 120px;
  padding-bottom: 0;
}

/* Back link reuses .m-back from manifesto.css if available, else local */
.meth-back {
  max-width: var(--max);
  margin: 0 auto 56px;
  padding: 0 var(--gutter);
}
.meth-back a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bone-muted);
  display: inline-flex; align-items: center; gap: 10px;
  transition: color 0.4s var(--ease-out), gap 0.4s var(--ease-out);
}
.meth-back a:hover { color: var(--bone); gap: 14px; }
.meth-back .arr { display: inline-block; transition: transform 0.4s var(--ease-out); }
.meth-back a:hover .arr { transform: translateX(-4px); }

/* Hero */
.meth-hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.meth-hero-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--bone-faint);
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 56px;
}
.meth-hero-meta::before {
  content: ""; width: 36px; height: 1px; background: var(--hairline-strong);
}
.meth-hero-title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(40px, 6.4vw, 88px);
  line-height: 1.0;
  letter-spacing: -0.026em;
  color: var(--bone);
  margin: 0 0 32px;
  text-wrap: balance;
  max-width: 18ch;
}
.meth-hero-title em, .meth-hero-title .italic { font-style: italic; }
.meth-hero-sub {
  font-family: var(--serif);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(18px, 2.1vw, 26px);
  line-height: 1.35;
  letter-spacing: -0.008em;
  color: var(--bone-muted);
  max-width: 42ch;
  margin: 0 0 72px;
}

/* ── Monitor wall — large gauge + 5 layer mini-rows ─────────────────── */
.meth-monitor {
  border: 1px solid var(--hairline);
  background: linear-gradient(to bottom right, var(--obsidian-2), var(--obsidian));
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  position: relative;
  margin-bottom: 32px;
}
.meth-monitor::before, .meth-monitor::after {
  content: ""; position: absolute;
  width: 14px; height: 14px;
  pointer-events: none;
}
.meth-monitor::before {
  top: 8px; left: 8px;
  border-top: 1px solid var(--bone-whisper);
  border-left: 1px solid var(--bone-whisper);
}
.meth-monitor::after {
  bottom: 8px; right: 8px;
  border-bottom: 1px solid var(--bone-whisper);
  border-right: 1px solid var(--bone-whisper);
}

.meth-gauge-pane {
  border-right: 1px solid var(--hairline);
  padding: 36px clamp(28px, 4vw, 56px);
  display: flex; flex-direction: column; gap: 24px;
  min-height: 520px;
}
.meth-pane-label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--bone-faint);
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 14px;
}
.meth-pane-label span:last-child {
  color: var(--bone-whisper);
  font-size: 9.5px;
}
.meth-gauge {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px;
}
.meth-gauge-svg {
  width: 100%;
  max-width: 380px;
  height: auto;
  color: var(--bone);
  position: relative;
}
.meth-gauge-state {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  font-size: 17px;
  color: var(--bone-muted);
  text-align: center;
  margin-top: -28px;
}

/* 5 small layer rows */
.meth-rows {
  display: flex; flex-direction: column;
}
.meth-row {
  padding: 22px 28px;
  border-bottom: 1px solid var(--hairline);
  display: flex; flex-direction: column; gap: 10px;
}
.meth-row:last-child { border-bottom: none; }
.meth-row-head {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 14px;
}
.meth-row-name {
  display: flex; flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.meth-row-num {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.28em;
  color: var(--bone-whisper);
  text-transform: uppercase;
}
.meth-row-title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: 16px;
  letter-spacing: -0.008em;
  color: var(--bone);
  line-height: 1.2;
}
.meth-row-val {
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--bone);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.meth-bar {
  position: relative;
  height: 3px;
  background: rgba(236,230,217,0.06);
}
.meth-bar-fill {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: linear-gradient(to right, rgba(236,230,217,0.32), rgba(236,230,217,0.88));
}

@media (max-width: 880px) {
  .meth-monitor { grid-template-columns: 1fr; }
  .meth-gauge-pane {
    border-right: none;
    border-bottom: 1px solid var(--hairline);
    min-height: 360px;
  }
}

/* ── Body ────────────────────────────────────────────────────────────── */
.meth-body {
  max-width: 1180px;
  margin: 0 auto;
  padding: 120px var(--gutter) 0;
}
.meth-section { margin-bottom: 96px; }
.meth-section:last-child { margin-bottom: 0; }

.meth-eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--bone-faint);
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 40px;
}
.meth-eyebrow::before {
  content: ""; width: 28px; height: 1px; background: var(--hairline-strong);
}
.meth-heading {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(32px, 4.6vw, 60px);
  line-height: 1.02;
  letter-spacing: -0.024em;
  color: var(--bone);
  margin: 0 0 32px;
  text-wrap: balance;
  max-width: 22ch;
}
.meth-heading .italic { font-style: italic; }

.meth-prose { max-width: 720px; }
.meth-prose p {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(18px, 1.55vw, 22px);
  line-height: 1.55;
  letter-spacing: -0.005em;
  color: var(--bone);
  margin: 0 0 1.1em;
  text-wrap: pretty;
}
.meth-prose p.minor { color: var(--bone-muted); }
.meth-prose p em { font-style: italic; }

.meth-declarative {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(22px, 2.6vw, 36px);
  line-height: 1.3;
  letter-spacing: -0.018em;
  color: var(--bone);
  padding: 12px 0 12px 28px;
  border-left: 1px solid var(--hairline-strong);
  margin: 32px 0 0;
  max-width: 760px;
}

/* ── The Five Layers ─────────────────────────────────────────────────── */
.meth-layers {
  margin-top: 56px;
  display: flex; flex-direction: column;
  border-top: 1px solid var(--hairline-strong);
}
.meth-layer {
  padding: 64px 0;
  border-bottom: 1px solid var(--hairline);
  display: grid;
  grid-template-columns: 112px 1fr 260px;
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
.meth-layer:last-child { border-bottom: none; }

.meth-layer-rail {
  position: sticky;
  top: 100px;
  display: flex; flex-direction: column; gap: 14px;
}
.meth-layer-num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--bone-whisper);
  text-transform: uppercase;
}
.meth-layer-num-big {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  font-size: 56px;
  letter-spacing: -0.024em;
  color: var(--bone);
  line-height: 1;
}
.meth-layer-tag {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--bone-faint);
  padding: 5px 8px;
  border: 1px solid var(--hairline);
  align-self: flex-start;
}

.meth-layer-title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--bone);
  margin: 0 0 18px;
  text-wrap: balance;
}
.meth-layer-objective {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.4;
  color: var(--bone-muted);
  margin: 0 0 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--hairline);
}
.meth-layer-body p {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(16px, 1.4vw, 18.5px);
  line-height: 1.55;
  color: var(--bone-muted);
  margin: 0 0 1em;
  text-wrap: pretty;
}
.meth-layer-body p em { color: var(--bone); font-style: italic; }

.meth-grid-2 {
  margin-top: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
}
.meth-col-label {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.28em;
  color: var(--bone-whisper);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.meth-chips {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.meth-chip {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bone-muted);
  border: 1px solid var(--hairline);
  padding: 5px 9px;
  background: rgba(236, 230, 217, 0.02);
  white-space: nowrap;
}
.meth-chip.metric {
  font-family: var(--mono);
  text-transform: none;
  letter-spacing: 0.04em;
  color: var(--bone);
  border-color: var(--hairline-strong);
}

.meth-layer-viz {
  border: 1px solid var(--hairline);
  background: var(--obsidian-2);
  aspect-ratio: 4 / 3;
  position: relative;
  overflow: hidden;
}
.meth-layer-viz svg {
  width: 100%; height: 100%;
  display: block;
  color: var(--bone);
}
.meth-layer-viz-cap {
  position: absolute;
  bottom: 10px; left: 12px; right: 12px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.24em;
  color: var(--bone-whisper);
  text-transform: uppercase;
  display: flex; justify-content: space-between;
}

@media (max-width: 1000px) {
  .meth-layer {
    grid-template-columns: 96px 1fr;
    gap: 28px;
  }
  /* The unnamed wrapper around .meth-layer-viz is grid child #3 — span it full-width below the rail + main */
  .meth-layer > div:last-child {
    grid-column: 1 / -1;
    max-width: 460px;
  }
}
@media (max-width: 720px) {
  .meth-layer { grid-template-columns: 1fr; gap: 24px; }
  .meth-layer-rail { position: static; flex-direction: row; align-items: center; gap: 18px; }
  .meth-layer-num-big { font-size: 36px; }
  .meth-grid-2 { grid-template-columns: 1fr; gap: 24px; }
}

/* ── Output bands ────────────────────────────────────────────────────── */
.meth-output {
  margin-top: 48px;
  display: flex; flex-direction: column;
  border: 1px solid var(--hairline);
  background: linear-gradient(to bottom, var(--obsidian-2), var(--obsidian));
}
.meth-output-row {
  display: grid;
  grid-template-columns: 110px 1fr 120px;
  gap: 24px;
  padding: 22px 32px;
  border-bottom: 1px solid var(--hairline);
  align-items: center;
}
.meth-output-row:last-child { border-bottom: none; }
.meth-output-range {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--bone-muted);
  font-variant-numeric: tabular-nums;
}
.meth-output-name {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(17px, 1.7vw, 22px);
  letter-spacing: -0.01em;
  color: var(--bone);
  text-wrap: balance;
}
.meth-output-tint {
  height: 6px;
  justify-self: end;
  width: 100%;
}
.meth-output-row[data-band="diverse"]   .meth-output-tint { background: linear-gradient(to right, transparent, rgba(236,230,217,0.18)); }
.meth-output-row[data-band="moderate"]  .meth-output-tint { background: linear-gradient(to right, transparent, rgba(236,230,217,0.32)); }
.meth-output-row[data-band="narrative"] .meth-output-tint { background: linear-gradient(to right, transparent, rgba(236,230,217,0.48)); }
.meth-output-row[data-band="crowding"]  .meth-output-tint { background: linear-gradient(to right, transparent, rgba(236,230,217,0.7)); }
.meth-output-row[data-band="fragility"] .meth-output-tint { background: linear-gradient(to right, transparent, rgba(220,170,110,0.75)); }

@media (max-width: 720px) {
  .meth-output-row { grid-template-columns: 84px 1fr; padding: 18px 20px; }
  .meth-output-tint { display: none; }
}

/* ── Pager (reuses .m-foot from manifesto.css) ───────────────────────── */