:root{
    --bg:#14150F;
    --bg-panel:#1B1C15;
    --bg-panel-2:#20221A;
    --copper:#C97A4A;
    --copper-bright:#E4966A;
    --verdigris:#5FA893;
    --paper:#EDE8DA;
    --stone:#8C897A;
    --line: rgba(237,232,218,0.12);
    --line-strong: rgba(237,232,218,0.22);
    --display: 'Big Shoulders Display', sans-serif;
    --mono: 'JetBrains Mono', monospace;
    --body: 'Work Sans', sans-serif;
  }

  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--bg);
    color:var(--paper);
    font-family:var(--body);
    font-weight:300;
    line-height:1.6;
    overflow-x:hidden;
  }
  ::selection{ background:var(--copper); color:var(--bg); }

  a{color:inherit; text-decoration:none;}
  ul{list-style:none;}
  img,svg{display:block; max-width:100%;}

  .eyebrow{
    font-family:var(--mono);
    font-size:0.72rem;
    letter-spacing:0.22em;
    text-transform:uppercase;
    color:var(--copper);
  }

  h1,h2,h3{
    font-family:var(--display);
    font-weight:800;
    text-transform:uppercase;
    letter-spacing:0.01em;
    line-height:0.95;
  }

  .wrap{
    max-width:1240px;
    margin:0 auto;
    padding:0 clamp(20px,5vw,56px);
  }

  /* ---------- NAV ---------- */
  header{
    position:fixed; top:0; left:0; right:0; z-index:100;
    padding:22px 0;
    transition:background .35s ease, border-color .35s ease, padding .35s ease;
    border-bottom:1px solid transparent;
  }
  header.solid{
    background:rgba(20,21,15,0.92);
    backdrop-filter: blur(10px);
    border-bottom:1px solid var(--line);
    padding:14px 0;
  }
  nav.wrap{
    display:flex; align-items:center; justify-content:space-between;
  }
  .logo{
    font-family:var(--display);
    font-weight:900;
    font-size:1.5rem;
    letter-spacing:0.03em;
    display:flex; align-items:center; gap:10px;
  }
  .logo .mark{
    width:26px; height:26px;
    border:1.5px solid var(--copper);
    border-radius:3px;
    display:flex; align-items:center; justify-content:center;
    font-family:var(--mono); font-size:0.65rem; color:var(--copper);
    font-weight:600;
  }
  .navlinks{
    display:flex; gap:clamp(16px,3vw,34px);
    font-family:var(--mono);
    font-size:0.76rem;
    letter-spacing:0.06em;
    text-transform:uppercase;
  }
  .navlinks a{
    position:relative; color:var(--stone);
    transition:color .25s ease;
    padding-bottom:3px;
  }
  .navlinks a:hover{ color:var(--paper); }
  .navlinks a::after{
    content:''; position:absolute; left:0; bottom:0; width:0; height:1px;
    background:var(--copper); transition:width .25s ease;
  }
  .navlinks a:hover::after{ width:100%; }
  .navlinks li.current a{ color:var(--copper); }
  .navcta{
    font-family:var(--mono); font-size:0.72rem; letter-spacing:0.08em;
    text-transform:uppercase; color:var(--paper);
    border:1px solid var(--line-strong); padding:9px 16px; border-radius:2px;
    transition:border-color .25s ease, color .25s ease;
  }
  .navcta:hover{ border-color:var(--copper); color:var(--copper); }
  .navlinks-mobile-hide{display:flex;}
  @media (max-width:760px){
    .navlinks-mobile-hide{ display:none; }
  }

  /* ---------- HERO ---------- */
  .hero{
    position:relative;
    min-height:100vh;
    display:flex; flex-direction:column; justify-content:center;
    padding-top:120px; padding-bottom:80px;
    overflow:hidden;
  }
  .hero-bg{
    position:absolute; inset:0; z-index:0;
    opacity:0.55;
  }
  .hero-bg svg{ width:100%; height:100%; }
  .orbit-field{
    position:absolute; top:50%; right:-6%; transform:translateY(-50%);
    width:min(46vw,560px); height:min(46vw,560px);
    z-index:0; opacity:0.9;
  }
  @media (max-width:900px){ .orbit-field{ opacity:0.35; right:-20%; } }

  .hero-content{ position:relative; z-index:2; }
  .hero .eyebrow{ margin-bottom:22px; display:flex; align-items:center; gap:12px;}
  .hero .eyebrow .dot{ width:6px; height:6px; background:var(--verdigris); border-radius:50%; display:inline-block; animation:pulse 2.4s ease-in-out infinite;}
  @keyframes pulse{ 0%,100%{opacity:1;} 50%{opacity:0.25;} }

  .hero h1{
    font-size:clamp(3.4rem, 11vw, 9rem);
    color:var(--paper);
    max-width:14ch;
  }
  .hero h1 span{ color:var(--copper); }
  .hero-sub{
    margin-top:26px;
    max-width:46ch;
    font-size:clamp(1rem,1.6vw,1.2rem);
    color:var(--stone);
    font-weight:300;
  }
  .hero-actions{
    margin-top:44px;
    display:flex; gap:16px; flex-wrap:wrap;
  }
  .btn{
    font-family:var(--mono); font-size:0.78rem; letter-spacing:0.08em; text-transform:uppercase;
    padding:15px 28px; border-radius:2px;
    display:inline-flex; align-items:center; gap:10px;
    transition:all .25s ease;
    border:1px solid transparent;
  }
  .btn-primary{ background:var(--copper); color:var(--bg); font-weight:600;}
  .btn-primary:hover{ background:var(--copper-bright); transform:translateY(-2px); }
  .btn-ghost{ border-color:var(--line-strong); color:var(--paper); }
  .btn-ghost:hover{ border-color:var(--verdigris); color:var(--verdigris); transform:translateY(-2px);}

  .hero-scroll{
    position:absolute; bottom:34px; left:50%; transform:translateX(-50%);
    z-index:2; display:flex; flex-direction:column; align-items:center; gap:10px;
    font-family:var(--mono); font-size:0.65rem; letter-spacing:0.2em; color:var(--stone);
    text-transform:uppercase;
  }
  .hero-scroll .line{ width:1px; height:40px; background:linear-gradient(var(--copper), transparent); animation:scrolldown 1.8s ease-in-out infinite; }
  @keyframes scrolldown{ 0%{transform:scaleY(0); transform-origin:top;} 50%{transform:scaleY(1); transform-origin:top;} 51%{transform-origin:bottom;} 100%{transform:scaleY(0); transform-origin:bottom;} }

  /* ---------- SECTION SHELL ---------- */
  section{ position:relative; padding:120px 0; }
  .section-head{
    display:flex; justify-content:space-between; align-items:flex-end;
    gap:30px; margin-bottom:60px; flex-wrap:wrap;
    border-bottom:1px solid var(--line); padding-bottom:34px;
  }
  .section-head h2{ font-size:clamp(2.2rem,5vw,3.6rem); color:var(--paper); }
  .section-head .desc{ max-width:38ch; color:var(--stone); font-size:0.95rem; }

  /* ---------- TABLE / FILTER ---------- */
  .filters{ display:flex; gap:10px; margin-top:26px; flex-wrap:wrap; }
  .filter-btn{
    font-family:var(--mono); font-size:0.72rem; letter-spacing:0.06em; text-transform:uppercase;
    padding:9px 18px; border:1px solid var(--line-strong); border-radius:2px; color:var(--stone);
    transition:all .2s ease; cursor:pointer; background:transparent;
  }
  .filter-btn:hover{ color:var(--paper); border-color:var(--paper); }
  .filter-btn.active{ background:var(--copper); border-color:var(--copper); color:var(--bg); font-weight:600;}

  .periodic-grid{
    display:grid;
    grid-template-columns:repeat(4, 1fr);
    gap:2px;
    background:var(--line);
    border:1px solid var(--line);
  }
  @media (max-width:900px){ .periodic-grid{ grid-template-columns:repeat(2,1fr); } }
  @media (max-width:520px){ .periodic-grid{ grid-template-columns:1fr; } }

  .tile{
    background:var(--bg-panel);
    padding:22px 18px 20px;
    aspect-ratio:1/1.05;
    display:flex; flex-direction:column;
    position:relative;
    cursor:default;
    transition:background .3s ease, transform .3s ease;
  }
  @media (max-width:520px){ .tile{ aspect-ratio:auto; padding:26px 20px; } }
  .tile:hover{ background:var(--bg-panel-2); }
  .tile.hidden{ display:none; }
  .tile-top{ display:flex; justify-content:space-between; align-items:flex-start; font-family:var(--mono); }
  .tile-num{ font-size:0.78rem; color:var(--stone); }
  .tile-cat{ font-size:0.62rem; color:var(--verdigris); text-transform:uppercase; letter-spacing:0.08em; text-align:right; }
  .tile-symbol{
    font-family:var(--display); font-weight:900; font-size:clamp(2.6rem,5vw,3.6rem);
    color:var(--paper); margin-top:auto; line-height:1;
    transition:color .3s ease;
  }
  .tile:hover .tile-symbol{ color:var(--copper); }
  .tile-name{ font-family:var(--mono); font-size:0.85rem; letter-spacing:0.04em; margin-top:10px; color:var(--paper); text-transform:uppercase;}
  .tile-desc{ font-size:0.82rem; color:var(--stone); margin-top:8px; line-height:1.5; }
  .tile-price{ margin-top:14px; font-family:var(--mono); font-size:0.78rem; color:var(--stone); border-top:1px solid var(--line); padding-top:12px; display:flex; justify-content:space-between;}
  .tile-price b{ color:var(--paper); font-weight:500; }

  /* ---------- MANIFESTO ---------- */
  .manifesto{ background:var(--bg-panel); }
  .principles{
    display:grid; grid-template-columns:repeat(2,1fr); gap:1px;
    background:var(--line); border:1px solid var(--line); margin-top:10px;
  }
  @media (max-width:760px){ .principles{ grid-template-columns:1fr; } }
  .principle{
    background:var(--bg-panel); padding:48px 40px;
  }
  .principle-badge{
    width:52px; height:52px; border:1.5px solid var(--verdigris); border-radius:4px;
    display:flex; align-items:center; justify-content:center; flex-direction:column;
    font-family:var(--mono); color:var(--verdigris); margin-bottom:26px; position:relative;
  }
  .principle-badge span.el{ font-size:1.1rem; font-weight:600; line-height:1;}
  .principle-badge span.num{ position:absolute; top:3px; left:5px; font-size:0.55rem; color:var(--verdigris); }
  .principle h3{ font-size:1.5rem; color:var(--paper); margin-bottom:12px; }
  .principle p{ color:var(--stone); font-size:0.95rem; max-width:44ch; }

  /* ---------- SCOPE / INTERACTIVE ---------- */
  .scope-section .wrap{ display:grid; grid-template-columns:0.9fr 1.1fr; gap:70px; align-items:center; }
  @media (max-width:900px){ .scope-section .wrap{ grid-template-columns:1fr; gap:50px; } }
  .scope-copy .eyebrow{ margin-bottom:20px; }
  .scope-copy h2{ font-size:clamp(2rem,4.4vw,3rem); color:var(--paper); margin-bottom:22px; }
  .scope-copy p{ color:var(--stone); max-width:46ch; margin-bottom:30px; }

  .wave-select{ display:flex; gap:10px; flex-wrap:wrap; }
  .wave-btn{
    font-family:var(--mono); font-size:0.75rem; letter-spacing:0.05em; text-transform:uppercase;
    padding:11px 18px; border:1px solid var(--line-strong); color:var(--stone); background:transparent;
    cursor:pointer; border-radius:2px; transition:all .2s ease;
  }
  .wave-btn:hover{ color:var(--paper); border-color:var(--paper); }
  .wave-btn.active{ border-color:var(--copper); color:var(--copper); }

  .scope-panel{
    background:var(--bg-panel); border:1px solid var(--line);
    padding:26px; border-radius:4px;
  }
  .scope-panel-head{ display:flex; justify-content:space-between; align-items:center; margin-bottom:16px; font-family:var(--mono); font-size:0.7rem; color:var(--stone); letter-spacing:0.08em; text-transform:uppercase;}
  .scope-panel-head .led{ width:7px; height:7px; border-radius:50%; background:var(--verdigris); display:inline-block; margin-right:8px; box-shadow:0 0 8px var(--verdigris);}
  canvas#scope{ width:100%; height:220px; display:block; background:#0F100C; border-radius:2px; }
  .scope-controls{ display:flex; gap:22px; margin-top:20px; flex-wrap:wrap; }
  .knob-group{ display:flex; flex-direction:column; align-items:center; gap:8px; }
  .knob{
    width:50px; height:50px; border-radius:50%;
    border:1px solid var(--line-strong);
    background:radial-gradient(circle at 35% 30%, #2A2C21, #16170F);
    position:relative; cursor:grab;
  }
  .knob::after{
    content:''; position:absolute; top:6px; left:50%; width:2px; height:14px;
    background:var(--copper); transform-origin:bottom center; transform:translateX(-50%) rotate(var(--rot,0deg));
  }
  .knob-label{ font-family:var(--mono); font-size:0.62rem; color:var(--stone); text-transform:uppercase; letter-spacing:0.08em;}

  /* ---------- BUILD GUIDES / COMMUNITY STRIP ---------- */
  .strip{
    display:flex; align-items:center; gap:60px;
    padding:26px 0; overflow:hidden; border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  }
  .strip-track{ display:flex; gap:60px; white-space:nowrap; animation:scrollx 26s linear infinite; }
  .strip-track span{ font-family:var(--mono); font-size:0.8rem; letter-spacing:0.12em; text-transform:uppercase; color:var(--stone); }
  .strip-track span b{ color:var(--copper); }
  @keyframes scrollx{ from{transform:translateX(0);} to{transform:translateX(-50%);} }

  /* ---------- NEWSLETTER / CTA ---------- */
  .cta-section{ text-align:center; }
  .cta-section h2{ font-size:clamp(2.4rem,7vw,5rem); color:var(--paper); max-width:16ch; margin:0 auto 26px; }
  .cta-section p{ color:var(--stone); max-width:44ch; margin:0 auto 40px; }
  .signup-form{ display:flex; max-width:460px; margin:0 auto; border:1px solid var(--line-strong); border-radius:2px; overflow:hidden; }
  .signup-form input{
    flex:1; background:transparent; border:none; padding:16px 18px; color:var(--paper);
    font-family:var(--body); font-size:0.95rem; outline:none;
  }
  .signup-form input::placeholder{ color:var(--stone); }
  .signup-form button{
    background:var(--copper); color:var(--bg); border:none; padding:0 26px;
    font-family:var(--mono); font-size:0.75rem; letter-spacing:0.06em; text-transform:uppercase;
    cursor:pointer; font-weight:600; transition:background .2s ease;
  }
  .signup-form button:hover{ background:var(--copper-bright); }
  .form-note{ margin-top:16px; font-family:var(--mono); font-size:0.72rem; color:var(--stone); }

  /* ---------- FOOTER ---------- */
  footer{ background:var(--bg-panel); border-top:1px solid var(--line); padding:80px 0 30px; }
  .footer-grid{
    display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; padding-bottom:60px;
  }
  @media (max-width:760px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
  .footer-brand .logo{ margin-bottom:18px; }
  .footer-brand p{ color:var(--stone); font-size:0.88rem; max-width:32ch; }
  .footer-col h4{
    font-family:var(--mono); font-size:0.7rem; letter-spacing:0.1em; text-transform:uppercase;
    color:var(--stone); margin-bottom:18px;
  }
  .footer-col ul li{ margin-bottom:12px; }
  .footer-col ul li a{ font-size:0.9rem; color:var(--paper); opacity:0.82; transition:opacity .2s ease, color .2s ease; }
  .footer-col ul li a:hover{ opacity:1; color:var(--copper); }
  .footer-bottom{
    display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:14px;
    padding-top:26px; border-top:1px solid var(--line);
    font-family:var(--mono); font-size:0.72rem; color:var(--stone); letter-spacing:0.03em;
  }
  .footer-bottom a{ color:var(--stone); }
  .footer-bottom a:hover{ color:var(--copper); }

  /* focus visibility */
  a:focus-visible, button:focus-visible, input:focus-visible{
    outline:2px solid var(--verdigris); outline-offset:2px;
  }

  @media (prefers-reduced-motion: reduce){
    *{ animation:none !important; transition:none !important; }
  }

@keyframes spin{ to{ transform:rotate(360deg); } }