/* Project page: Brain-State Circuit Resonance. Depends on site.css. */

/* ---------- Project hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  min-height: min(calc(100svh - var(--header-h)), 780px);
  padding-block: clamp(28px, 4vw, 56px);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 4.7vw, 4.25rem);
  line-height: 1.03;
}

.hero-line {
  display: block;
}

.hero-line-warm {
  margin-top: 0.12em;
  color: var(--warm);
}

.hero-lede {
  max-width: 36em;
  margin: 26px 0 0;
  color: var(--text-2);
  font-size: clamp(1.03rem, 1.5vw, 1.15rem);
  line-height: 1.7;
}

.hero-lede strong {
  color: var(--text-1);
  font-weight: 600;
}

.project-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
}

.project-facts div {
  padding: 12px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
}

.project-facts dt {
  margin: 0 0 4px;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.project-facts dd {
  margin: 0;
  color: var(--text-1);
  font-size: 0.9rem;
  line-height: 1.4;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 22px;
}

.hero-visual {
  margin: 0;
}

.hero-stage {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-l);
  background:
    radial-gradient(circle at 50% 50%, rgba(242, 184, 114, 0.08), transparent 58%),
    radial-gradient(circle at 50% 50%, rgba(143, 180, 255, 0.06), transparent 72%),
    var(--ink-1);
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  cursor: pointer;
}

.hero-stage canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.hero-readout {
  position: absolute;
  top: 16px;
  left: 16px;
  display: grid;
  gap: 2px;
  padding: 10px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  background: rgba(10, 13, 18, 0.62);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  pointer-events: none;
}

.hero-readout-label,
.hero-readout-state {
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-readout strong {
  color: var(--warm-strong);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.hero-readout-state {
  color: var(--known);
}

.hero-controls {
  display: flex;
  justify-content: center;
  margin-top: 16px;
}

.hold-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 10px 20px 10px 12px;
  border: 1px solid rgba(242, 184, 114, 0.55);
  border-radius: 999px;
  background: rgba(242, 184, 114, 0.08);
  color: var(--text-1);
  font: 600 0.92rem var(--font-sans);
  cursor: pointer;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.hold-button:hover {
  background: rgba(242, 184, 114, 0.14);
}

.hold-ring {
  --p: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: conic-gradient(var(--warm) calc(var(--p) * 1turn), rgba(242, 184, 114, 0.18) 0);
  -webkit-mask: radial-gradient(circle, transparent 7px, black 8px);
  mask: radial-gradient(circle, transparent 7px, black 8px);
}

.hold-button.is-holding {
  background: rgba(242, 184, 114, 0.2);
}

.hero-visual figcaption {
  max-width: 34em;
  margin: 12px auto 0;
  color: var(--text-3);
  font-size: 0.84rem;
  line-height: 1.5;
  text-align: center;
}

/* ---------- Sections ---------- */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: clamp(28px, 5vw, 64px);
}

.split-text h3 {
  margin: 0 0 20px;
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  line-height: 1.08;
}

.zh {
  display: block;
  margin-top: 10px;
  color: var(--text-3);
  font-family: var(--font-sans);
  font-size: 0.42em;
  letter-spacing: 0.12em;
}

.pull {
  margin: 0 0 18px;
  padding-left: 18px;
  border-left: 2px solid var(--warm);
  color: var(--text-1);
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  line-height: 1.45;
}

.pull em {
  color: var(--warm-strong);
}

.split-text > p:not(.pull):not(.step-label) {
  color: var(--text-2);
  font-size: 1.05rem;
  line-height: 1.7;
}

.split-text strong {
  color: var(--text-1);
  font-weight: 600;
}

.loop-figure {
  display: grid;
  place-items: center;
}

.loop-svg {
  width: min(100%, 560px);
  height: auto;
  overflow: visible;
}

.loop-arc {
  fill: none;
  stroke: var(--warm);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 5 7;
  animation: loop-flow 1.6s linear infinite;
}

@keyframes loop-flow {
  to { stroke-dashoffset: -24; }
}

.loop-node circle {
  fill: var(--ink-0);
  stroke: var(--warm);
  stroke-width: 2;
}

.loop-node text,
.loop-center {
  fill: var(--text-1);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  text-anchor: middle;
}

.loop-node .anchor-start { text-anchor: start; }
.loop-node .anchor-end { text-anchor: end; }

.loop-center {
  fill: var(--text-3);
  font-family: var(--font-serif);
  font-size: 16px;
  font-style: italic;
  font-weight: 400;
}

/* Seven dimensions */

.dimension-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.dimension-grid li {
  display: grid;
  align-content: start;
  gap: 6px;
  min-height: 132px;
  padding: 18px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  background: var(--ink-1);
}

.dimension-grid strong {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 400;
}

.dimension-grid li > span:last-child {
  color: var(--text-2);
  font-size: 0.93rem;
  line-height: 1.5;
}

.dim-index {
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.dimension-grid .dim-key {
  grid-column: span 2;
  border-color: rgba(242, 184, 114, 0.45);
  background: linear-gradient(135deg, rgba(242, 184, 114, 0.12), transparent 70%), var(--ink-1);
}

.dim-key strong {
  color: var(--warm-strong);
}

/* Closed loop steps */

.loop-steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 36px;
  padding: 0;
  list-style: none;
}

.loop-steps::before {
  content: "";
  position: absolute;
  top: 34px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--hairline-strong) 10%, var(--hairline-strong) 90%, transparent);
}

.loop-steps li {
  position: relative;
  display: grid;
  justify-items: start;
  gap: 8px;
  padding: 16px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  background: var(--ink-1);
}

.loop-step-n {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--hairline-strong);
  border-radius: 50%;
  background: var(--ink-0);
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.loop-steps strong {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
}

.loop-steps li > span:last-child {
  color: var(--text-2);
  font-size: 0.92rem;
  line-height: 1.5;
}

.loop-step-return {
  border-color: rgba(121, 242, 201, 0.4) !important;
}

.loop-step-return .loop-step-n {
  border-color: var(--known);
  color: var(--known);
}

/* Ladder */

.ladder {
  overflow: hidden;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
}

.ladder-title {
  margin: 0;
  padding: 14px 18px;
  border-bottom: 1px solid var(--hairline);
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.ladder-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) minmax(0, 240px);
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--hairline);
  color: var(--text-2);
  line-height: 1.5;
}

.ladder-row:last-child {
  border-bottom: 0;
}

.ladder-level {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-1);
  font-family: var(--font-serif);
  font-size: 1.15rem;
}

.ladder-verdict {
  color: var(--text-1);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: right;
}

.principle {
  margin: 44px 0 0;
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--radius-l);
  background: radial-gradient(circle at 0% 0%, rgba(242, 184, 114, 0.14), transparent 60%), var(--ink-1);
}

.principle p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3.2vw, 2.2rem);
  font-style: italic;
  line-height: 1.3;
}

.principle p::before {
  content: "“";
  color: var(--warm);
}

.principle p::after {
  content: "”";
  color: var(--warm);
}

.principle cite {
  display: block;
  margin-top: 16px;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-style: normal;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- Labs ---------- */

.lab-card {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  grid-template-areas:
    "intro figure"
    "body figure";
  grid-template-rows: auto 1fr;
  column-gap: clamp(24px, 4vw, 48px);
  row-gap: 0;
  margin-bottom: 20px;
  padding: clamp(20px, 3.4vw, 40px);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-l);
  background: var(--ink-1);
}

.lab-kicker {
  margin: 0 0 10px;
  color: var(--warm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.lab-intro { grid-area: intro; }
.lab-body { grid-area: body; }
.lab-figure { grid-area: figure; }

.lab-intro h4 {
  margin: 0 0 12px;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  line-height: 1.25;
}

.lab-intro > p,
.lab-body > p {
  margin: 0 0 14px;
  color: var(--text-2);
  line-height: 1.65;
}

.lab-control {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
}

.lab-control label,
.control-label {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--text-2);
  font-size: 0.88rem;
  font-weight: 600;
}

.lab-control strong {
  color: var(--warm-strong);
  font-family: var(--font-mono);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.lab-control input[type="range"] {
  width: 100%;
  margin: 4px 0 0;
  accent-color: var(--warm);
}

.lab-scale {
  display: flex;
  justify-content: space-between;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.lab-readout {
  margin-top: 16px !important;
  padding: 12px 14px;
  border-radius: var(--radius-s);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-1) !important;
  font-size: 0.95rem;
}

.lab-takeaway strong,
.verdict strong {
  color: var(--text-1);
}

.lab-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 0.86rem;
}

.lab-links a {
  color: var(--text-2);
  text-decoration: underline;
  text-decoration-color: var(--hairline-strong);
  text-underline-offset: 3px;
}

.lab-links a:hover {
  color: var(--warm-strong);
  text-decoration-color: var(--warm);
}

.lab-figure {
  display: grid;
  align-content: center;
  gap: 10px;
  min-width: 0;
}

.figure-note {
  margin: 0;
  color: var(--text-3);
  font-size: 0.8rem;
  line-height: 1.5;
}

/* Decoder chart */

.decoder-chart {
  width: 100%;
  height: auto;
  overflow: visible;
}

.decoder-chart .grid-line {
  stroke: var(--hairline);
  stroke-width: 1;
}

.decoder-chart .axis-label,
.decoder-chart .tick-label {
  fill: var(--text-3);
  font-family: var(--font-mono);
  font-size: 11px;
}

.decoder-chart .axis-label {
  fill: var(--text-2);
}

.decoder-chart .chance-line {
  stroke: var(--speculative);
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
}

.decoder-chart .chance-label {
  fill: var(--speculative);
  font-family: var(--font-mono);
  font-size: 11px;
}

.decoder-chart .series {
  fill: none;
  stroke-width: 2.5;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.decoder-chart .series-nc { stroke: var(--warm); }
.decoder-chart .series-lr { stroke: var(--plausible); }
.decoder-chart .point-nc { fill: var(--warm); }
.decoder-chart .point-lr { fill: var(--plausible); }

.decoder-chart .series-label {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
}

.decoder-chart .series-label-nc { fill: var(--warm); }
.decoder-chart .series-label-lr { fill: var(--plausible); }

.decoder-chart .cursor-line {
  stroke: var(--text-2);
  stroke-width: 1;
  stroke-dasharray: 2 3;
}

.decoder-chart .cursor-dot {
  stroke: var(--ink-0);
  stroke-width: 2;
}

.decoder-chart .hit {
  fill: transparent;
  cursor: pointer;
}

/* Segmented controls */

.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.segmented button {
  min-width: 44px;
  min-height: 38px;
  padding: 7px 12px;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--text-2);
  font: 500 0.84rem var(--font-mono);
  cursor: pointer;
}

.segmented button[aria-checked="true"] {
  border-color: var(--warm);
  background: var(--warm-soft);
  color: var(--warm-strong);
}

.stim-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 20px 0 12px;
}

.stim-metrics div {
  display: grid;
  gap: 2px;
  padding: 12px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
}

.stim-metrics span {
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.stim-metrics strong {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.stim-metrics div:first-child strong { color: var(--known); }
.stim-metrics div:last-child strong { color: var(--warm-strong); }

.stim-metrics small {
  color: var(--text-3);
  font-size: 0.78rem;
}

.challenge {
  margin: 0 0 14px !important;
  padding: 10px 12px;
  border: 1px dashed var(--hairline-strong);
  border-radius: var(--radius-s);
  color: var(--text-2) !important;
  font-size: 0.88rem;
}

.challenge.is-met {
  border-color: var(--known);
  color: var(--known) !important;
}

.stim-canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  background: var(--ink-0);
}

.verdict {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  margin-top: 8px;
  padding: clamp(18px, 3vw, 28px);
  border-left: 3px solid var(--warm);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  background: rgba(242, 184, 114, 0.06);
}

.verdict p {
  margin: 0;
  color: var(--text-2);
  line-height: 1.65;
}

/* ---------- Explore ---------- */

.explore-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.explore-card {
  display: grid;
  align-content: start;
  gap: 10px;
  min-height: 190px;
  padding: 22px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-l);
  background: var(--ink-1);
  text-decoration: none;
  transition: border-color 0.25s ease, transform 0.25s var(--ease-out), background 0.25s ease;
}

.explore-card:hover {
  border-color: rgba(242, 184, 114, 0.45);
  background: var(--ink-2);
  transform: translateY(-3px);
}

.explore-card strong {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.2;
}

.explore-card > span:not(.explore-meta):not(.explore-legend) {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.55;
}

.explore-meta {
  color: var(--warm);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.explore-card-feature {
  grid-row: span 2;
  background:
    radial-gradient(circle at 80% 20%, rgba(143, 180, 255, 0.16), transparent 50%),
    radial-gradient(circle at 20% 90%, rgba(121, 242, 201, 0.12), transparent 50%),
    var(--ink-1);
}

.explore-card-feature strong {
  font-size: 1.7rem;
}

.explore-legend {
  display: flex;
  gap: 8px;
  margin-top: auto;
  padding-top: 12px;
}

/* ---------- Boundary ---------- */

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.boundary-col {
  padding: 22px 24px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-l);
  background: var(--ink-1);
}

.boundary-col h4 {
  margin: 0 0 12px;
  font-size: 1.35rem;
}

.boundary-col.is h4 { color: var(--known); }
.boundary-col.isnt h4 { color: var(--speculative); }

.boundary-col ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
  color: var(--text-2);
  line-height: 1.55;
}

.tier-ladder {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.tier-ladder li {
  display: grid;
  gap: 4px;
  padding: 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  color: var(--text-3);
  font-size: 0.86rem;
  line-height: 1.35;
}

.tier-ladder span {
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.tier-ladder .reached {
  border-color: rgba(121, 242, 201, 0.35);
  color: var(--text-1);
}

.tier-ladder .reached span {
  color: var(--known);
}

.tier-ladder .current {
  background: rgba(121, 242, 201, 0.08);
}

.tier-ladder em {
  color: var(--known);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-style: normal;
}

/* ---------- Back / next ---------- */

.next-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding-top: clamp(56px, 8vw, 96px);
}

.next-card {
  display: grid;
  gap: 6px;
  padding: 22px 24px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-l);
  background: var(--ink-1);
  text-decoration: none;
  transition: border-color 0.25s ease, transform 0.25s var(--ease-out);
}

.next-card:hover {
  border-color: rgba(242, 184, 114, 0.45);
  transform: translateY(-2px);
}

.next-card-forward {
  text-align: right;
}

.next-meta {
  color: var(--warm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.next-card strong {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
}

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .hero,
  .split {
    grid-template-columns: 1fr;
  }

  .lab-card {
    grid-template-columns: 1fr;
    grid-template-areas:
      "intro"
      "figure"
      "body";
    grid-template-rows: auto;
    row-gap: 18px;
  }

  .hero {
    min-height: 0;
  }

  .hero-visual {
    max-width: 560px;
    width: 100%;
    margin: 0 auto;
  }

  .dimension-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .loop-steps {
    grid-template-columns: 1fr;
  }

  .loop-steps::before {
    top: 20px;
    bottom: 20px;
    left: 34px;
    right: auto;
    width: 1px;
    height: auto;
    background: var(--hairline-strong);
  }

  .loop-steps li {
    grid-template-columns: 36px minmax(0, 1fr);
    column-gap: 14px;
    align-items: start;
  }

  .loop-steps li > span:last-child {
    grid-column: 2;
  }

  .loop-steps strong {
    align-self: center;
  }

  .explore-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .explore-card-feature {
    grid-row: auto;
    grid-column: 1 / -1;
  }

  .tier-ladder {
    grid-template-columns: repeat(5, minmax(120px, 1fr));
    overflow-x: auto;
  }
}

@media (max-width: 640px) {
  .project-facts,
  .next-nav {
    grid-template-columns: 1fr;
  }

  .next-card-forward {
    text-align: left;
  }

  .hero h1 {
    font-size: clamp(2.2rem, 10vw, 2.8rem);
  }

  .hero-actions .btn {
    flex: 1 1 100%;
  }

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

  .dimension-grid li {
    min-height: 0;
  }

  .dimension-grid .dim-key {
    grid-column: auto;
  }

  .ladder-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .ladder-verdict {
    text-align: left;
  }

  .explore-grid,
  .boundary-grid {
    grid-template-columns: 1fr;
  }

  .explore-card {
    min-height: 0;
  }

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

  .tier-ladder {
    grid-template-columns: 1fr;
    overflow: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .loop-arc {
    animation: none;
  }
}