body {
    background: #050505;
    --life: #2fbf8f;
    --life-dim: #1c7d5e;
    --life-bright: #56dea8;
    --meat: #d98a7a;
  }
  ::selection { background: var(--life-dim); color: var(--white); }

  /* ---- nav (matches homepage) ---- */
  .topscrim {
    position: fixed; top: 0; left: 0; right: 0; height: 110px; z-index: 25; pointer-events: none;
    background: linear-gradient(to bottom, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.5) 45%, rgba(0,0,0,0));
  }
  .topnav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 30;
    display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
    padding: 1.1rem clamp(1rem, 4vw, 2.2rem);
  }
  .topnav .wordmark { font-size: 1.05rem; }
  .topnav .links { display: flex; align-items: baseline; white-space: nowrap; column-gap: clamp(0.7rem, 2.2vw, 1.5rem); }
  .topnav .links a {
    font-family: var(--sans); font-size: 0.62rem; font-weight: 600;
    letter-spacing: 0.18em; text-transform: uppercase; color: var(--white);
  }
  .topnav .links a:hover { opacity: 0.6; }
  .topnav .links a.current { color: var(--life-bright); }
  @media (max-width: 640px) {
    .topnav { align-items: center; gap: 0.5rem; padding: 0.85rem 1rem; }
    .topnav .links { column-gap: 0.85rem; flex-wrap: wrap; }
    .topnav .links a { font-size: 0.55rem; letter-spacing: 0.12em; }
  }

  main { position: relative; z-index: 10; }

  /* ---- hero ---- */
  .sol-hero {
    position: relative;
    min-height: 100vh;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    text-align: center;
    padding: 6rem var(--gutter) 4rem;
    overflow: hidden;
  }
  #sol-hero-canvas { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
  .sol-hero .inner { position: relative; z-index: 1; }
  .sol-hero .kicker { color: var(--life-bright); margin-bottom: 1.6rem; }
  .sol-hero h1 {
    font-size: clamp(2.5rem, 8vw, 5.2rem);
    line-height: 1.06;
    letter-spacing: -0.025em;
    color: var(--white);
  }
  .sol-hero h1 .line { display: block; }
  .sol-hero h1 .turn { color: var(--life-bright); }
  .sol-hero .lede {
    margin: 2.6rem auto 0;
    max-width: 36rem;
    font-family: var(--serif);
    font-size: clamp(1.1rem, 2.6vw, 1.45rem);
    line-height: 1.5;
    color: var(--bone);
    text-wrap: pretty;
  }
  .sol-hero .scroll { margin-top: 3rem; font-size: 0.66rem; font-weight: 600; letter-spacing: 0.32em; text-transform: uppercase; color: var(--grey); }
  .sol-hero .scroll .arrow { display: block; margin-top: 0.7rem; font-size: 1rem; }
  @media (prefers-reduced-motion: no-preference) {
    .sol-hero .scroll .arrow { animation: bob 2.4s cubic-bezier(0.65,0,0.35,1) infinite; }
  }
  @keyframes bob { 0%,100% { transform: translateY(0); opacity: 0.5; } 50% { transform: translateY(8px); opacity: 1; } }

  /* ---- intro turn ---- */
  .turn-beat { padding: 12vh var(--gutter); max-width: 52rem; margin-inline: auto; }
  .turn-beat .big {
    font-family: var(--serif);
    font-size: clamp(1.7rem, 4.6vw, 2.9rem);
    line-height: 1.28;
    color: var(--white);
    text-wrap: pretty;
  }
  .turn-beat .big .life { color: var(--life-bright); }
  .turn-beat p {
    margin-top: 1.6rem; max-width: 40rem;
    font-size: 1.1rem; line-height: 1.7; color: var(--bone);
  }

  /* ---- process sections (sticky scroll-scrubbed) ---- */
  .process { position: relative; height: 340vh; }
  .process-stage {
    position: sticky; top: 0; height: 100vh; overflow: hidden;
    display: grid;
    grid-template-columns: minmax(0, 27rem) 1fr;
    align-items: center;
    gap: clamp(1rem, 4vw, 4rem);
    padding: 0 var(--gutter);
    max-width: 86rem; margin-inline: auto;
  }
  .proc-left { position: relative; z-index: 2; }
  .proc-kicker {
    font-family: var(--sans); font-size: 0.68rem; font-weight: 700;
    letter-spacing: 0.26em; text-transform: uppercase; color: var(--life-bright);
    margin-bottom: 1.1rem;
  }
  .proc-title {
    font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.04;
    color: var(--white); margin-bottom: 1.8rem; text-wrap: balance;
  }
  .proc-title .life { color: var(--life-bright); }
  .proc-caps { display: grid; min-height: 9.5rem; }
  .proc-cap {
    grid-area: 1 / 1; margin: 0;
    font-size: 1.08rem; line-height: 1.62; color: var(--bone);
    text-wrap: pretty; opacity: 0; transform: translateY(8px);
    transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
  }
  .proc-cap.on { opacity: 1; transform: none; }
  .proc-cap strong { color: var(--white); font-weight: 600; }
  .proc-cap b { color: var(--life-bright); font-weight: 600; }
  .proc-progress { display: flex; gap: 0.5rem; margin-top: 1.8rem; }
  .proc-progress i {
    width: 26px; height: 3px; background: rgba(232,228,220,0.16);
    transition: background 0.4s var(--ease-out);
  }
  .proc-progress i.on { background: var(--life-bright); }
  .proc-note {
    margin-top: 1.7rem; font-family: var(--sans); font-size: 0.62rem; font-weight: 600;
    letter-spacing: 0.18em; text-transform: uppercase; color: var(--grey-dim); line-height: 1.9;
  }
  .proc-note a { color: var(--grey); text-decoration: underline; text-underline-offset: 3px; }
  .proc-note a:hover { color: var(--life-bright); }

  .proc-figure { position: relative; height: 78vh; display: flex; align-items: center; justify-content: center; }
  .proc-figure svg { width: 100%; height: 100%; max-width: 560px; }

  /* staged SVG elements */
  .st { opacity: 0; transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out); }
  .st.vis { opacity: 1; }
  .st.pop { transform: scale(0.7); transform-box: fill-box; transform-origin: center; }
  .st.pop.vis { transform: scale(1); }
  .st.rise { transform: translateY(14px); }
  .st.rise.vis { transform: translateY(0); }

  /* shared diagram strokes */
  .vessel { fill: rgba(255,255,255,0.015); stroke: rgba(232,228,220,0.5); stroke-width: 2; }
  .vessel-line { stroke: rgba(232,228,220,0.28); stroke-width: 1.5; fill: none; }
  .lbl { font-family: var(--sans); font-size: 13px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; fill: var(--grey); }
  .lbl-life { fill: var(--life-bright); }
  .cell { fill: rgba(86,222,168,0.16); stroke: var(--life); stroke-width: 1.6; }
  .nucleus { fill: var(--life); }

  /* liquid fill driven by --p */
  .liquid { fill: rgba(47,191,143,0.12); transform-box: fill-box; transform-origin: bottom; transform: scaleY(var(--p, 0)); }

  /* bubbles rise only while in the reactor stages */
  .bubble { fill: rgba(86,222,168,0.5); opacity: 0; }
  @media (prefers-reduced-motion: no-preference) {
    .process[data-stage="2"] .bubble,
    .process[data-stage="3"] .bubble { animation: rise 2.4s linear infinite; }
  }
  .bubble:nth-of-type(2) { animation-delay: -0.8s !important; }
  .bubble:nth-of-type(3) { animation-delay: -1.5s !important; }
  .bubble:nth-of-type(4) { animation-delay: -2.0s !important; }
  .bubble:nth-of-type(5) { animation-delay: -1.1s !important; }
  @keyframes rise {
    0% { opacity: 0; transform: translateY(0); }
    15% { opacity: 0.8; }
    100% { opacity: 0; transform: translateY(-230px); }
  }

  .tissue { fill: rgba(217,138,122,0.22); stroke: var(--meat); stroke-width: 1.6; }
  .marble { stroke: rgba(245,242,236,0.55); stroke-width: 1.4; fill: none; stroke-linecap: round; }
  .molecule { fill: none; stroke: var(--life-bright); stroke-width: 1.6; }
  .dna { stroke: var(--life-bright); stroke-width: 1.6; fill: none; }
  .sugar { fill: rgba(232,228,220,0.4); }
  .plant { stroke: var(--life); stroke-width: 1.8; fill: rgba(86,222,168,0.1); }
  .fiber { stroke: var(--meat); stroke-width: 2; fill: none; stroke-linecap: round; }
  .heat { stroke: var(--blood-bright); stroke-width: 1.4; fill: none; stroke-linecap: round; opacity: 0.7; }

  @media (max-width: 820px) {
    .process { height: 300vh; }
    .process-stage {
      grid-template-columns: 1fr;
      grid-template-rows: 1fr auto;
      align-items: stretch; gap: 0.5rem;
      padding-top: 4.5rem; padding-bottom: 2rem;
    }
    .proc-figure { height: 42vh; order: -1; }
    .proc-left { align-self: end; }
    .proc-caps { min-height: 8.5rem; }
    .proc-title { margin-bottom: 1rem; }
  }

  /* ---- myths / FUD section ---- */
  .myths { max-width: 56rem; margin-inline: auto; padding: 12vh var(--gutter) 4vh; }
  .myths .kicker { color: var(--blood-bright); }
  .myths h2 { font-size: clamp(2rem, 5.5vw, 3.4rem); line-height: 1.04; margin: 1.1rem 0 1rem; text-wrap: balance; }
  .myths .intro { max-width: 40rem; color: var(--bone); font-size: 1.1rem; line-height: 1.65; margin-bottom: 2.4rem; }
  .myth-list { list-style: none; border-top: 1px solid var(--hairline); }
  .myth-list li { border-bottom: 1px solid var(--hairline-faint); }
  .myth-list a {
    display: grid; grid-template-columns: 1fr auto; gap: 0.3rem 1rem; align-items: baseline;
    padding: 1.3rem 0;
  }
  .myth-list .claim {
    font-family: var(--serif); font-size: clamp(1.2rem, 3vw, 1.45rem); line-height: 1.25;
    color: var(--white); text-wrap: pretty;
  }
  .myth-list .claim::before { content: '\201C'; color: var(--blood-bright); }
  .myth-list .claim::after { content: '\201D'; color: var(--blood-bright); }
  .myth-list .verdict { font-family: var(--sans); font-size: 0.66rem; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: var(--life-bright); white-space: nowrap; }
  .myth-list .a { grid-column: 1 / -1; color: var(--grey); font-size: 0.95rem; line-height: 1.55; max-width: 44rem; }
  .myth-list a:hover .claim { color: var(--life-bright); }
  .myth-foot { margin-top: 2rem; font-size: 0.95rem; color: var(--grey); }
  .myth-foot a { color: var(--bone); text-decoration: underline; text-underline-offset: 3px; }

  /* ---- closing ---- */
  .sol-close { max-width: 52rem; margin-inline: auto; padding: 8vh var(--gutter) 4vh; text-align: center; }
  .sol-close h2 { font-size: clamp(1.9rem, 5vw, 3rem); line-height: 1.08; text-wrap: balance; }
  .sol-close p { margin: 1.4rem auto 0; max-width: 36rem; color: var(--bone); font-size: 1.1rem; line-height: 1.65; }
  .sol-close .row { display: flex; gap: 0.9rem; flex-wrap: wrap; justify-content: center; margin-top: 2.4rem; }
  .btn--life { border-color: var(--life-dim); color: var(--white); }
  .btn--life:hover { background: var(--life); border-color: var(--life); color: #04130d; }
  .sol-foot { text-align: center; padding: 2.5rem var(--gutter) 4rem; font-size: 0.66rem; font-weight: 600; letter-spacing: 0.24em; text-transform: uppercase; color: var(--grey-dim); }
  .sol-foot a { color: var(--grey); }

  @media (prefers-reduced-motion: no-preference) {
    .js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out); }
    .js .reveal.in { opacity: 1; transform: none; }
  }