/* Popcorn Atlas — The Science of the Pop
   Brand tokens from /workspace/kern/ui/tokens.css — cream editorial. */

:root {
  --pa-ink: #141210;
  --pa-ink-soft: #1e1a17;
  --pa-cream: #f6f1e8;
  --pa-card: #efe8dc;
  --pa-muted: #6f6358;
  --pa-hull: #c45c26;
  --pa-hull-deep: #9a451c;
  --pa-hull-wash: rgba(196, 92, 38, 0.12);
  --pa-hull-wash-strong: rgba(196, 92, 38, 0.2);
  --pa-kernel: #c8a24a;
  --pa-border: #ddd4c6;
  --pa-border-strong: #cfc5b5;
  --font-display: "Newsreader", "Iowan Old Style", Palatino, "Palatino Linotype", serif;
  --font-sans: "Source Sans 3", "Source Sans Pro", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --radius: 10px;
  --rule: 1px;
  --max: 1120px;
  --content: 680px;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--pa-cream);
  color: var(--pa-ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

a {
  color: var(--pa-hull);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.15s ease;
}
a:hover { color: var(--pa-hull-deep); }

:focus-visible {
  outline: 2px solid var(--pa-hull);
  outline-offset: 3px;
}

.wrap {
  position: relative;
  z-index: 1;
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pa-muted);
  margin: 0 0 0.75rem;
}

.display {
  font-family: var(--font-display);
  font-weight: 400;
  font-optical-sizing: auto;
  letter-spacing: -0.025em;
  line-height: 0.96;
  color: var(--pa-ink);
  margin: 0;
}

.lede {
  font-size: 1.125rem;
  line-height: 1.5;
  color: var(--pa-ink);
  max-width: 36em;
  margin: 1.25rem 0 0;
}

.muted { color: var(--pa-muted); }
.mono { font-family: var(--font-mono); }

.rule {
  border: 0;
  border-top: var(--rule) solid var(--pa-border);
  margin: 0;
}

/* —— Header —— */
.site-header {
  border-bottom: var(--rule) solid var(--pa-border);
  padding: 1rem 0;
  background: color-mix(in srgb, var(--pa-cream) 92%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 40;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--pa-ink);
}

.brand img { width: 28px; height: 28px; }
.brand-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  line-height: 1.1;
}
.brand-name span {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--pa-muted);
  font-family: var(--font-sans);
  font-weight: 500;
}

.header-pill {
  text-decoration: none;
  color: inherit;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pa-hull-deep);
  background: var(--pa-hull-wash);
  border: var(--rule) solid color-mix(in srgb, var(--pa-hull) 28%, var(--pa-border));
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
}

/* —— Hero —— */
.hero {
  padding: 4.5rem 0 2.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: end;
}

.hero h1.display {
  font-size: clamp(3.1rem, 7.2vw, 5.4rem);
  max-width: 9.2ch;
}

.hero .thesis {
  margin-top: 1.5rem;
  font-size: 1.2rem;
  line-height: 1.45;
  max-width: 28em;
  color: var(--pa-ink);
}

.hero .thesis strong {
  font-weight: 600;
  color: var(--pa-hull-deep);
}

.keyfacts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: var(--rule) solid var(--pa-border);
  border-radius: var(--radius);
  background: var(--pa-card);
  overflow: hidden;
}

.keyfact {
  padding: 1.15rem 1.1rem 1.25rem;
  border-right: var(--rule) solid var(--pa-border);
}
.keyfact:last-child { border-right: 0; }

.keyfact .label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pa-muted);
  margin-bottom: 0.55rem;
}

.keyfact .value {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.4vw, 1.7rem);
  letter-spacing: -0.02em;
  color: var(--pa-kernel);
  line-height: 1;
}

.keyfact .unit {
  display: block;
  margin-top: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--pa-muted);
  letter-spacing: 0;
}

.hero-note {
  margin-top: 0.85rem;
  font-size: 0.8rem;
  color: var(--pa-muted);
}

/* Hero macro visual */
.hero-visual-wrap {
  margin-top: 2.75rem;
}

.hero-visual {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: var(--rule) solid var(--pa-border);
  background: var(--pa-card);
  aspect-ratio: 16 / 9;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  /* Soften AI gloss → editorial matte */
  filter: saturate(0.88) contrast(1.04) brightness(0.98);
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 85% 75% at 50% 45%, transparent 40%, color-mix(in srgb, var(--pa-cream) 55%, transparent) 78%, var(--pa-cream) 100%),
    linear-gradient(to top, color-mix(in srgb, var(--pa-cream) 70%, transparent), transparent 28%);
  mix-blend-mode: multiply;
  opacity: 0.85;
}

.hero-visual-fallback {
  display: none;
  position: absolute;
  inset: 0;
}
.hero-visual.is-fallback .hero-visual-fallback { display: block; }
.hero-visual.is-fallback img { display: none; }
.hero-visual-fallback svg { width: 100%; height: 100%; }

.hero-visual-cap {
  position: absolute;
  left: 1rem;
  bottom: 0.85rem;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pa-muted);
  background: color-mix(in srgb, var(--pa-cream) 82%, transparent);
  padding: 0.3rem 0.55rem;
  border-radius: 4px;
}

@media (min-width: 1100px) {
  .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }
}

/* —— Sections —— */
.section {
  padding: 4rem 0;
  border-top: var(--rule) solid var(--pa-border);
}

.section-head {
  max-width: var(--content);
  margin-bottom: 2.25rem;
}

.section-head h2.display {
  font-size: clamp(2rem, 4vw, 2.85rem);
  max-width: 16ch;
}

.section-head p {
  margin: 1rem 0 0;
  color: var(--pa-muted);
  max-width: 38em;
}

/* —— Anatomy —— */
.anatomy-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}

.anatomy-stage {
  background: var(--pa-card);
  border: var(--rule) solid var(--pa-border);
  border-radius: var(--radius);
  padding: 1.75rem 1.25rem 1.5rem;
  position: relative;
}

.anatomy-stage svg {
  width: 100%;
  height: auto;
  margin: 0 auto;
}

.layer-hit {
  cursor: pointer;
  transition: opacity 0.2s ease, fill 0.2s ease;
}
.layer-hit:hover,
.layer-hit.is-active {
  opacity: 1;
}
.anatomy-stage.is-filtering .layer-hit:not(.is-active) {
  opacity: 0.28;
}

.anatomy-labels {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.layer-card {
  background: transparent;
  border: var(--rule) solid var(--pa-border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
  font: inherit;
  color: inherit;
}
.layer-card:hover,
.layer-card.is-active {
  background: var(--pa-card);
  border-color: color-mix(in srgb, var(--pa-hull) 35%, var(--pa-border));
}
.layer-card .name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.015em;
  margin: 0 0 0.25rem;
}
.layer-card .role {
  font-size: 0.92rem;
  color: var(--pa-muted);
  margin: 0;
  line-height: 1.4;
}
.layer-card.is-active .name { color: var(--pa-hull-deep); }

/* —— Simulator —— */
.sim-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 1.75rem;
  align-items: end;
}

.sim-shell {
  background: var(--pa-card);
  border: var(--rule) solid var(--pa-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.sim-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  padding: 0.85rem 1rem;
  border-bottom: var(--rule) solid var(--pa-border);
  background: color-mix(in srgb, var(--pa-cream) 55%, var(--pa-card));
}

.method-switch {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0;
  border: var(--rule) solid var(--pa-border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--pa-cream);
}

.method-switch [role="tab"] {
  appearance: none;
  border: 0;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 550;
  color: var(--pa-muted);
  padding: 0.55rem 0.85rem;
  cursor: pointer;
  border-right: var(--rule) solid var(--pa-border);
  transition: background 0.15s ease, color 0.15s ease;
}
.method-switch [role="tab"]:last-child { border-right: 0; }
.method-switch [role="tab"]:hover { color: var(--pa-ink); }
.method-switch [role="tab"][aria-selected="true"] {
  background: var(--pa-hull);
  color: #fff;
}

.sim-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  border: var(--rule) solid transparent;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.55rem 0.95rem;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--pa-hull);
  color: #fff;
  border-color: var(--pa-hull);
}
.btn-primary:hover {
  background: var(--pa-hull-deep);
  border-color: var(--pa-hull-deep);
}

/* Reverse-knot secondary */
.btn-secondary {
  background: var(--pa-hull-wash);
  color: var(--pa-hull-deep);
  border-color: color-mix(in srgb, var(--pa-hull) 22%, var(--pa-border));
}
.btn-secondary:hover {
  background: var(--pa-hull-wash-strong);
  color: var(--pa-hull-deep);
}

.btn-sound[aria-pressed="true"] {
  background: var(--pa-hull);
  color: #fff;
  border-color: var(--pa-hull);
}
.btn-sound[aria-pressed="true"]:hover {
  background: var(--pa-hull-deep);
  border-color: var(--pa-hull-deep);
}

.sim-body {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  min-height: 420px;
}

.sim-viz {
  position: relative;
  padding: 1.5rem 1.25rem 1.25rem;
  border-right: var(--rule) solid var(--pa-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.stage-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.stage-pill {
  appearance: none;
  border: var(--rule) solid var(--pa-border);
  background: var(--pa-cream);
  color: var(--pa-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 0.65rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.stage-pill:hover { color: var(--pa-ink); border-color: var(--pa-border-strong); }
.stage-pill[aria-current="true"] {
  background: var(--pa-hull-wash);
  color: var(--pa-hull-deep);
  border-color: color-mix(in srgb, var(--pa-hull) 35%, var(--pa-border));
}

.kernel-stage {
  flex: 1;
  display: grid;
  place-items: center;
  min-height: 260px;
  position: relative;
}

.kernel-stage svg {
  width: min(100%, 280px);
  height: auto;
}

.heat-rings {
  position: absolute;
  inset: 12% 18%;
  pointer-events: none;
  border-radius: 50%;
  opacity: 0;
}
.heat-rings::before,
.heat-rings::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--pa-hull) 40%, transparent);
}
.heat-rings::after {
  inset: 10%;
  border-color: color-mix(in srgb, var(--pa-kernel) 45%, transparent);
}

.sim-playing .heat-rings {
  animation: heatPulse 2.4s ease-in-out infinite;
  opacity: 1;
}

@keyframes heatPulse {
  0%, 100% { transform: scale(0.92); opacity: 0.35; }
  50% { transform: scale(1.05); opacity: 0.85; }
}

.sim-side {
  padding: 1.25rem 1.25rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.readouts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.readout {
  border: var(--rule) solid var(--pa-border);
  border-radius: 8px;
  background: var(--pa-cream);
  padding: 0.7rem 0.75rem 0.8rem;
}
.readout .k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pa-muted);
  margin-bottom: 0.35rem;
}
.readout .v {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: var(--pa-kernel);
  line-height: 1;
}
.readout.pressure-peak .v { color: var(--pa-hull); }

.pressure-meter {
  height: 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--pa-border) 80%, var(--pa-cream));
  overflow: hidden;
  margin-top: 0.55rem;
}
.pressure-meter > span {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--pa-kernel), var(--pa-hull));
  border-radius: inherit;
  transition: width 0.05s linear;
}

.outcome {
  border-top: var(--rule) solid var(--pa-border);
  padding-top: 1rem;
}
.outcome .tag,
.atlas-card .tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pa-hull);
  margin: 0 0 0.45rem;
}
.outcome h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.4rem;
  line-height: 1.15;
}
.outcome p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--pa-muted);
  line-height: 1.45;
}

.method-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
}
.meta-chip {
  border: var(--rule) solid var(--pa-border);
  border-radius: 8px;
  padding: 0.65rem 0.7rem;
  background: transparent;
}
.meta-chip .k {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pa-muted);
  margin-bottom: 0.25rem;
}
.meta-chip .v {
  font-size: 0.88rem;
  color: var(--pa-ink);
  line-height: 1.25;
  font-weight: 550;
}

/* Atlas grounding card */
.atlas-card {
  border: var(--rule) solid color-mix(in srgb, var(--pa-hull) 28%, var(--pa-border));
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--pa-hull-wash) 70%, var(--pa-cream));
  padding: 1rem 1.05rem 1.1rem;
  animation: atlasIn 0.45s ease-out;
}
.atlas-card[hidden] { display: none !important; }

@keyframes atlasIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.atlas-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.35rem;
}
.atlas-card-head .tag { margin: 0; }

.atlas-score {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--pa-kernel);
  background: var(--pa-cream);
  border: var(--rule) solid var(--pa-border);
  border-radius: 6px;
  padding: 0.2rem 0.45rem;
  line-height: 1;
}

.atlas-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
  line-height: 1.15;
}
.atlas-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--pa-muted);
  line-height: 1.4;
}
.atlas-nod {
  margin-top: 0.55rem !important;
  font-size: 0.82rem !important;
}
.atlas-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--pa-hull);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--pa-hull) 45%, transparent);
}
.atlas-link:hover {
  color: var(--pa-hull-deep);
  border-bottom-color: var(--pa-hull-deep);
}

/* —— Shared timeline —— */
.sim-timeline {
  border-top: var(--rule) solid var(--pa-border);
  padding: 1rem 1.15rem 1.15rem;
  background: color-mix(in srgb, var(--pa-cream) 65%, var(--pa-card));
}

.timeline-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  margin-bottom: 0.65rem;
}

.timeline-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pa-muted);
}

.timeline-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
}

.leg-btn {
  appearance: none;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 0.82rem;
  color: var(--pa-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.15rem;
  opacity: 0.55;
  transition: opacity 0.15s ease, color 0.15s ease;
}
.leg-btn:hover { opacity: 0.85; color: var(--pa-ink); }
.leg-btn.is-active {
  opacity: 1;
  color: var(--pa-hull-deep);
  font-weight: 600;
}

.swatch {
  width: 12px;
  height: 3px;
  border-radius: 2px;
  display: inline-block;
}
.swatch-ink { background: var(--pa-ink); }
.swatch-hull { background: var(--pa-hull); }
.swatch-muted { background: var(--pa-muted); }
.swatch-kernel { background: var(--pa-kernel); }

.timeline-scroll {
  position: relative;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.25rem;
}

.timeline-chart {
  width: 100%;
  min-width: 520px;
  height: auto;
  display: block;
}

.tl-curve {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  cursor: pointer;
  transition: opacity 0.15s ease, stroke-width 0.15s ease;
}
.tl-curve.is-dim { opacity: 0.28; }
.tl-curve.is-active { opacity: 1; }
.tl-curve-temp { opacity: 0.45; }
.tl-curve-temp.is-dim { opacity: 0.12; }
.tl-curve-temp.is-active { opacity: 0.55; }

.tl-scrub {
  position: absolute;
  left: 7.5%;
  right: 5.5%;
  bottom: 2.6rem;
  width: auto;
  margin: 0;
  appearance: none;
  background: transparent;
  height: 28px;
  cursor: grab;
  z-index: 3;
}
.tl-scrub:active { cursor: grabbing; }
.tl-scrub::-webkit-slider-runnable-track {
  height: 4px;
  background: transparent;
}
.tl-scrub::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--pa-hull);
  border: 2px solid var(--pa-cream);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--pa-hull) 40%, transparent);
  margin-top: -6px;
}
.tl-scrub::-moz-range-track { height: 4px; background: transparent; border: 0; }
.tl-scrub::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--pa-hull);
  border: 2px solid var(--pa-cream);
}

.timeline-note {
  margin: 0.55rem 0 0;
  font-size: 0.78rem;
}

/* —— Moisture chart —— */
.chart-card {
  background: var(--pa-card);
  border: var(--rule) solid var(--pa-border);
  border-radius: var(--radius);
  padding: 1.5rem 1.35rem 1.35rem;
}

.chart-card .chart-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
}
.chart-card .chart-sub {
  margin: 0 0 1.5rem;
  color: var(--pa-muted);
  font-size: 0.95rem;
  max-width: 42em;
}

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

.sweet-band {
  fill: var(--pa-hull-wash-strong);
  stroke: none;
}

.chart-axis {
  stroke: var(--pa-border-strong);
  stroke-width: 1;
}
.chart-label {
  fill: var(--pa-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}
.chart-curve {
  fill: none;
  stroke: var(--pa-ink);
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.peak-dot {
  fill: var(--pa-hull);
}
.peak-label {
  fill: var(--pa-hull-deep);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
}

.why-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.why-points {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.why-point {
  border-left: 2px solid var(--pa-border);
  padding: 0.15rem 0 0.15rem 1rem;
}
.why-point strong {
  display: block;
  font-weight: 600;
  margin-bottom: 0.15rem;
}
.why-point p {
  margin: 0;
  color: var(--pa-muted);
  font-size: 0.95rem;
}
.why-point.is-key {
  border-left-color: var(--pa-hull);
}

/* —— Score —— */
.score-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.score-card {
  background: var(--pa-card);
  border: var(--rule) solid var(--pa-border);
  border-radius: var(--radius);
  padding: 1.1rem 1rem 1.15rem;
}
.score-card .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--pa-kernel);
  margin-bottom: 0.45rem;
}
.score-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.015em;
  margin: 0 0 0.35rem;
  line-height: 1.15;
}
.score-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--pa-muted);
  line-height: 1.4;
}

.nod {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  border: var(--rule) solid var(--pa-border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  background: color-mix(in srgb, var(--pa-hull-wash) 55%, var(--pa-cream));
}
.nod .rank {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  color: var(--pa-hull);
  letter-spacing: -0.02em;
  line-height: 1;
  padding-top: 0.15rem;
}
.nod h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0 0 0.3rem;
  letter-spacing: -0.015em;
}
.nod p {
  margin: 0;
  color: var(--pa-muted);
  font-size: 0.95rem;
  max-width: 44em;
}

/* —— Footer —— */
.site-footer {
  border-top: var(--rule) solid var(--pa-border);
  padding: 2.25rem 0 3rem;
}
.site-footer .wrap {
  display: grid;
  gap: 1rem;
}
.footer-mark {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pa-hull-deep);
}
.sources {
  font-size: 0.82rem;
  color: var(--pa-muted);
  line-height: 1.55;
  max-width: 58em;
}
.sources cite {
  font-style: normal;
}

/* —— Reduced motion —— */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sim-playing .heat-rings { animation: none; opacity: 0.5; }
  .atlas-card { animation: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* —— Responsive —— */
@media (max-width: 900px) {
  .hero-grid,
  .anatomy-grid,
  .sim-intro,
  .sim-body,
  .why-grid {
    grid-template-columns: 1fr;
  }
  .sim-viz { border-right: 0; border-bottom: var(--rule) solid var(--pa-border); }
  .score-grid { grid-template-columns: 1fr 1fr; }
  .hero { padding-top: 3rem; }
  .keyfacts { grid-template-columns: 1fr; }
  .keyfact { border-right: 0; border-bottom: var(--rule) solid var(--pa-border); }
  .keyfact:last-child { border-bottom: 0; }
  .tl-scrub { bottom: 2.4rem; }
}

@media (max-width: 560px) {
  .wrap { width: min(100% - 1.5rem, var(--max)); }
  .method-switch { width: 100%; }
  .method-switch [role="tab"] {
    flex: 1 1 45%;
    text-align: center;
  }
  .score-grid { grid-template-columns: 1fr; }
  .readouts { grid-template-columns: 1fr 1fr; }
  .method-meta { grid-template-columns: 1fr; }
  .hero-visual-cap { font-size: 9px; left: 0.65rem; bottom: 0.55rem; }
}

/* Method-specific heat path visibility */
#sim-heat-path[data-mode="microwave"] .heat-bottom,
#sim-heat-path[data-mode="microwave"] .heat-sides {
  opacity: 0;
}
#sim-heat-path[data-mode="stovetop"] .heat-sides,
#sim-heat-path[data-mode="kettle"] .heat-sides {
  opacity: 0;
}
#sim-heat-path[data-mode="air"] .heat-bottom {
  opacity: 0;
}