@import url('https://fonts.googleapis.com/css2?family=Jura:wght@400;500&display=swap');

  :root{
    --bg:#07070a;
    --bg-vignette:#0d1013;
    --ink:#f3f4f1;
    --ink-dim:rgba(243,244,241,.52);
    --ink-faint:rgba(243,244,241,.22);
    --accent:#5be3d3;
    --accent-soft:rgba(91,227,211,.28);
    --hairline:rgba(243,244,241,.14);
  }

  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    background:var(--bg);
    color:var(--ink);
    font-family:'Jura',ui-sans-serif,system-ui,sans-serif;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
  }
  ::selection{background:var(--accent-soft);color:var(--ink);}

  .scroll-spacer{ height:600vh; width:1px; }

  :root{ --topbar-h:64px; }

  /* ---------- top navigation bar ---------- */
  .topbar{
    position:fixed;
    top:0;left:0;right:0;
    height:var(--topbar-h);
    z-index:5;
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:0 clamp(20px,5vw,64px);
    background:rgba(7,7,10,.72);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid var(--hairline);
  }
  .topbar .word{
    font-size:11px;
    letter-spacing:.16em;
    text-transform:uppercase;
    color:var(--ink-dim);
    white-space:nowrap;
  }
  .topbar-links{
    display:flex;
    gap:clamp(16px,3vw,40px);
    list-style:none;
    margin:0;
    padding:0;
  }
  .topbar-links a{
    font-size:11px;
    letter-spacing:.14em;
    text-transform:uppercase;
    color:var(--ink-dim);
    text-decoration:none;
    padding:6px 1px;
    border-bottom:1px solid transparent;
    transition:color .25s ease, border-color .25s ease;
    white-space:nowrap;
  }
  .topbar-links a:hover{color:var(--ink);}
  .topbar-links a[aria-current="true"]{color:var(--ink);border-bottom-color:var(--accent);}
  .topbar-links a:focus-visible{outline:1px solid var(--accent);outline-offset:3px;}

  .fixed-layout{
    position:fixed;
    inset:var(--topbar-h) 0 0 0;
    display:grid;
    grid-template-columns:64px minmax(280px,42%) 1fr;
    z-index:1;
  }

  /* ---------- nav dot rail ---------- */
  .dot-rail{
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:22px;
    list-style:none;
    margin:0;
    padding:0;
    border-right:1px solid var(--hairline);
  }
  .dot-rail button{
    appearance:none;
    background:none;
    border:none;
    padding:10px;
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:center;
  }
  .dot-rail button .dot{
    width:6px;height:6px;border-radius:50%;
    background:var(--ink-faint);
    transition:background .35s ease, transform .35s ease, box-shadow .35s ease;
  }
  .dot-rail button[aria-current="true"] .dot{
    background:var(--accent);
    transform:scale(1.9);
    box-shadow:0 0 10px 2px var(--accent-soft);
  }
  .dot-rail button:hover .dot{background:var(--ink-dim);}
  .dot-rail button:focus-visible{outline:1px solid var(--accent);outline-offset:4px;border-radius:50%;}

  /* ---------- left content column ---------- */
  .content-col{
    position:relative;
    display:flex;
    flex-direction:column;
    justify-content:center;
    padding:0 clamp(20px,5vw,64px);
  }
  .eyebrow{
    font-family:'Jura',ui-sans-serif,system-ui,sans-serif;
    font-size:11px;
    letter-spacing:.16em;
    text-transform:uppercase;
    color:var(--ink-faint);
    margin-bottom:28px;
    display:flex;
    align-items:center;
    gap:10px;
  }
  .eyebrow .rule{width:26px;height:1px;background:var(--ink-faint);display:inline-block;}

  .headline-stack{position:relative;height:clamp(220px,32vh,300px);}
  .slide{
    position:absolute;
    inset:0;
    display:flex;
    flex-direction:column;
    justify-content:center;
    gap:16px;
    opacity:0;
    transform:translateY(18px);
    pointer-events:none;
    will-change:opacity,transform;
  }
  .slide h1{
    font-family:'Jura',ui-sans-serif,system-ui,sans-serif;
    font-style:normal;
    font-weight:400;
    font-size:clamp(2.4rem,5.6vw,4.6rem);
    line-height:.98;
    margin:0;
    letter-spacing:-.01em;
    text-wrap:balance;
  }
  .slide-link{
    color:inherit;
    text-decoration:none;
    cursor:pointer;
    transition:color .25s ease;
  }
  .slide-link:hover,
  .slide-link:focus-visible{
    color:var(--accent);
  }
  .slide-link:focus-visible{
    outline:1px solid var(--accent);
    outline-offset:8px;
  }
  .slide .index{
    font-family:'Jura',ui-sans-serif,system-ui,sans-serif;
    font-size:12px;
    color:var(--accent);
    letter-spacing:.12em;
  }
  .slide p{
    margin:0;
    max-width:38ch;
    color:var(--ink-dim);
    font-size:15px;
    line-height:1.6;
    font-weight:400;
  }

  .scroll-hint{
    margin-top:40px;
    display:flex;
    align-items:center;
    gap:10px;
    font-family:'Jura',ui-sans-serif,system-ui,sans-serif;
    font-size:11px;
    letter-spacing:.14em;
    text-transform:uppercase;
    color:var(--ink-faint);
    opacity:1;
    transition:opacity .5s ease;
  }
  .scroll-hint .chev{
    width:9px;height:9px;
    border-right:1px solid var(--ink-faint);
    border-bottom:1px solid var(--ink-faint);
    transform:rotate(45deg);
    animation:bob 1.8s ease-in-out infinite;
  }
  @keyframes bob{0%,100%{transform:translateY(0) rotate(45deg);}50%{transform:translateY(5px) rotate(45deg);}}

  /* ---------- stage ---------- */
  .stage{
    position:relative;
    overflow:hidden;
  }
  .stage::after{
    content:"";
    position:absolute;
    inset:0;
    box-shadow:inset 0 0 140px 40px var(--bg);
    pointer-events:none;
    z-index:2;
  }
  #gl{
    position:relative;
    z-index:1;
    display:block;
    width:100%;
    height:100%;
    cursor:crosshair;
  }

  .coord-readout{
    position:absolute;
    left:clamp(20px,5vw,64px);
    bottom:28px;
    font-family:'Jura',ui-sans-serif,system-ui,sans-serif;
    font-size:11px;
    letter-spacing:.08em;
    color:var(--ink-faint);
    display:flex;
    gap:18px;
    font-variant-numeric:tabular-nums;
    z-index:1;
  }
  .coord-readout span b{color:var(--ink-dim);font-weight:500;}

  .brand{
    position:absolute;
    top:28px;
    left:clamp(20px,5vw,64px);
    font-family:'Jura',ui-sans-serif,system-ui,sans-serif;
    font-size:11px;
    letter-spacing:.14em;
    text-transform:uppercase;
    color:var(--ink-dim);
    z-index:1;
  }

  @media (max-width: 860px){
    :root{ --topbar-h:52px; }
    .topbar{padding:0 16px;}
    .topbar .word{display:none;}
    .topbar-links{gap:14px;width:100%;justify-content:space-between;}
    .topbar-links a{font-size:10px;}
    .fixed-layout{
      display:block;
      position:fixed;
      inset:var(--topbar-h) 0 0 0;
    }
    .dot-rail{
      flex-direction:row;
      position:absolute;
      top:12px;
      right:16px;
      border-right:none;
      gap:14px;
      z-index:3;
    }
    .stage{position:absolute;top:0;left:0;right:0;height:46vh;}
    .content-col{position:absolute;top:46vh;left:0;right:0;bottom:0;padding:24px 22px;}
    .headline-stack{height:auto;min-height:190px;}
    .slide h1{font-size:2.1rem;}
    .coord-readout{display:none;}
  }

  @media (prefers-reduced-motion: reduce){
    .scroll-hint .chev{animation:none;}
  }