:root{
  --bg:#07111d;--bg2:#0b1725;--panel:#0d1d2d;--panel2:#102438;
  --text:#edf5ff;--muted:#8ea2b8;--line:rgba(232,244,255,.12);
  --blue:#2b82ff;--teal:#25b8ad;--gold:#d4ad63;--cream:#f8f1df;
}
*{box-sizing:border-box}
html{background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}



/* Lightweight interactive signature starfield */
body::before{display:none!important}
.signature-starfield-canvas,.signature-starfield-interactive{position:fixed;inset:0;width:100vw;height:100vh;pointer-events:none}
.signature-starfield-canvas{z-index:0;opacity:.78}
.signature-starfield-interactive{z-index:1}
body>*{position:relative;z-index:2}

body{margin:0;min-height:100vh;background:
radial-gradient(800px 500px at 78% -10%,rgba(43,130,255,.12),transparent 60%),
radial-gradient(700px 450px at 8% 20%,rgba(37,184,173,.08),transparent 60%),
linear-gradient(180deg,#06101a 0%,#081421 50%,#07111d 100%);overflow-x:hidden}
button,a,input{font:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid #79bfff;outline-offset:3px}
.topbar{position:sticky;top:0;z-index:30;border-bottom:1px solid var(--line);background:rgba(6,16,26,.96)}
.nav{width:min(1320px,94vw);min-height:72px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;border:0;background:transparent;color:var(--text);padding:0;text-align:left}
.brand-mark{width:40px;height:40px;flex:none}
.brand-copy{display:flex;flex-direction:column;line-height:1}
.brand-name{font-size:13px;font-weight:800;letter-spacing:.18em}
.brand-tag{margin-top:5px;font-size:9px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.nav-actions{display:flex;gap:8px}
.nav-btn{border:1px solid transparent;background:transparent;color:var(--muted);padding:10px 13px;font-size:10px;letter-spacing:.1em;text-transform:uppercase}
.nav-btn:hover,.nav-btn.active{color:var(--text);border-color:var(--line);background:rgba(255,255,255,.035)}
.shell{width:min(1320px,94vw);margin:auto;padding:34px 0 72px}
.hero{display:grid;grid-template-columns:1.08fr .92fr;gap:34px;align-items:stretch}
.hero-copy{padding:52px 4px 28px}
.eyebrow{font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--gold);font-weight:700}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;font-weight:400}
h1{font-size:clamp(68px,8.5vw,132px);line-height:.82;letter-spacing:-.07em;margin:24px 0}
.hero-sub{max-width:600px;margin:0;color:#b8c7d8;font-size:16px;line-height:1.72}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.primary,.secondary{border:1px solid var(--line);padding:13px 18px;font-size:10px;letter-spacing:.13em;text-transform:uppercase}
.primary{background:#e7f3ff;color:#08111c;border-color:#e7f3ff}
.secondary{background:rgba(255,255,255,.035);color:var(--text)}
.primary:hover{background:#fff}.secondary:hover{background:rgba(255,255,255,.07)}
.hero-stage{min-height:520px;display:grid;place-items:center;border:1px solid var(--line);position:relative;overflow:hidden;background:
radial-gradient(circle at 50% 40%,rgba(43,130,255,.15),transparent 34%),
linear-gradient(180deg,rgba(14,29,45,.86),rgba(7,17,29,.98));}
.cosmic-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.024) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.024) 1px,transparent 1px);background-size:42px 42px;opacity:.9}
.feather-orbit{position:relative;width:min(70%,390px);aspect-ratio:1;display:grid;place-items:center}
.feather-halo{position:absolute;inset:9%;border:1px solid rgba(212,173,99,.22);border-radius:50%}
.hero-feather{width:42%;height:42%;object-fit:contain;transform:rotate(0deg)}
.section{margin-top:54px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:20px}
.section-title{font-size:44px;letter-spacing:-.05em;margin:0}
.section-copy{max-width:480px;color:var(--muted);font-size:13px;line-height:1.7;margin:0}
.library{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.card{padding:22px;border:1px solid var(--line);background:linear-gradient(160deg,rgba(16,36,56,.74),rgba(9,23,37,.96));min-height:190px;transition:transform .16s ease,border-color .16s ease}
.card:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.22)}
.card-kicker{font-size:9px;letter-spacing:.18em;text-transform:uppercase;color:var(--teal)}
.card h3{font-size:29px;letter-spacing:-.04em;margin:16px 0 8px}
.card p{margin:0;color:var(--muted);font-size:12px;line-height:1.6}
.card-actions{display:flex;justify-content:space-between;align-items:center;margin-top:18px}
.launch{border:0;background:transparent;color:var(--gold);padding:0;font-size:10px;letter-spacing:.13em;text-transform:uppercase}
.pill{font-size:9px;letter-spacing:.12em;text-transform:uppercase;color:#aec1d5;border:1px solid var(--line);padding:5px 7px}

.footer{margin-top:56px;padding:18px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;color:#7890a7;font-size:10px;letter-spacing:.08em;text-transform:uppercase}
.page-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}
.back-link{display:inline-flex;align-items:center;gap:8px;color:var(--muted);font-size:10px;letter-spacing:.12em;text-transform:uppercase}
.back-link:hover{color:var(--text)}
.library-page{padding-top:20px}
.library-intro{max-width:700px;color:var(--muted);font-size:14px;line-height:1.7}
.category{margin-top:34px}
.category h3{font-size:26px;margin:0 0 14px}
.library-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.sim-tile{border:1px solid var(--line);background:rgba(255,255,255,.02);padding:18px;min-height:150px}
.sim-tile:hover{border-color:rgba(255,255,255,.22)}
.sim-tile h4{font-family:Georgia,"Times New Roman",serif;font-size:24px;font-weight:400;margin:10px 0 7px}
.sim-tile p{font-size:11px;line-height:1.6;color:var(--muted);margin:0 0 14px}
.lab-wrap{padding-top:14px}
.lab-grid{display:grid;grid-template-columns:310px 1fr;gap:14px}
.controls,.readout,.canvas-wrap{border:1px solid var(--line);background:linear-gradient(160deg,rgba(16,36,56,.72),rgba(8,19,31,.98))}
.controls{padding:18px}
.controls h3,.readout h3{font-size:22px;margin:0 0 15px}
.control-group{padding:14px 0;border-top:1px solid var(--line)}
.control-row{display:flex;justify-content:space-between;gap:12px;margin-bottom:8px}
.control-row label{font-size:11px;color:#cad7e4}
.control-value{font-size:11px;color:var(--gold)}
input[type=range]{width:100%;accent-color:#5ca8ff}
.small-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}
.small-btn{border:1px solid var(--line);background:rgba(255,255,255,.035);color:var(--text);padding:10px;font-size:10px;letter-spacing:.1em;text-transform:uppercase}
.small-btn.primary-dark{background:#14365a}
.hint{margin-top:12px;color:var(--muted);font-size:10px;line-height:1.55}
.lab-main{display:grid;grid-template-columns:1fr 245px;gap:14px}
.canvas-wrap{position:relative;min-height:590px;overflow:hidden}
#simCanvas{display:block;width:100%;height:100%;touch-action:none}
.hud{position:absolute;left:16px;top:14px;display:flex;gap:8px}
.hud-item{padding:7px 9px;border:1px solid rgba(255,255,255,.1);background:rgba(5,13,22,.62);font-size:9px;letter-spacing:.1em;text-transform:uppercase;color:#b7c6d7}
.readout{padding:18px}
.metrics{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px}
.metric{border:1px solid var(--line);padding:10px;background:rgba(255,255,255,.02)}
.metric label{display:block;font-size:8px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:5px}
.metric strong{font-size:14px;font-weight:600}
.formula{margin-top:15px;padding:12px;border-left:2px solid var(--gold);background:rgba(212,173,99,.05);font:18px Georgia,serif;color:#f1e5c7}
.readout-note{margin-top:12px;font-size:10px;line-height:1.6;color:var(--muted)}
.top-actions{display:flex;gap:10px;align-items:center}
.status{font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}



/* Paddle donations */
.donate-btn{border-color:rgba(212,173,99,.3);color:#e8d29f}
.donate-btn:hover{border-color:var(--gold);background:rgba(212,173,99,.09);color:#f7e7bd}
.donate-modal-backdrop{position:fixed;inset:0;z-index:1000;display:grid;place-items:center;padding:20px;background:rgba(4,10,17,.54);backdrop-filter:blur(4px);opacity:0;transition:opacity .15s ease}
.donate-modal-backdrop[hidden]{display:none}
.donate-modal-backdrop.is-open{opacity:1}
.donate-modal{width:min(460px,92vw);border:1px solid rgba(18,30,43,.14);background:#fff;color:#132131;box-shadow:0 24px 70px rgba(0,0,0,.28);padding:28px;position:relative;transform:translateY(8px) scale(.985);transition:transform .15s ease}
.donate-modal-backdrop.is-open .donate-modal{transform:translateY(0) scale(1)}
.donate-close{position:absolute;top:10px;right:12px;border:0;background:transparent;color:#64748b;font-size:25px;line-height:1;padding:3px 6px}
.donate-close:hover{color:#172033}
.donate-eyebrow{font-size:9px;letter-spacing:.18em;text-transform:uppercase;color:#8b6a22;font-weight:800}
.donate-modal h2{font-size:36px;line-height:1;letter-spacing:-.045em;margin:11px 34px 10px 0;color:#102033}
.donate-modal p{margin:0;color:#5b6a7b;font-size:12px;line-height:1.65}
.donate-options{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:20px}
.donate-options button{border:1px solid #d8dee6;background:#f7f9fb;color:#182536;padding:14px 8px;font-size:12px;font-weight:750;transition:border-color .14s ease,background .14s ease,transform .14s ease}
.donate-options button:hover{border-color:#b9984e;background:#fffdf7;transform:translateY(-1px)}
.donate-note{margin-top:16px;padding-top:14px;border-top:1px solid #e4e8ed;color:#758395;font-size:9px;letter-spacing:.1em;text-transform:uppercase}
.donate-status{min-height:16px;margin-top:10px!important;color:#9a3d2f!important;font-size:10px!important}
.donate-modal-open{overflow:hidden}


@media(max-width:680px){
  .signature-starfield-canvas{opacity:.58}
  .signature-starfield-interactive{display:none}
  .donate-modal-backdrop{backdrop-filter:none}
}

@media(max-width:680px){.nav-actions{flex-wrap:wrap}.donate-options{grid-template-columns:repeat(2,1fr)}.donate-modal{padding:22px}.donate-modal h2{font-size:31px}}

@media(max-width:1050px){
  .hero{grid-template-columns:1fr}.hero-stage{min-height:430px}
  .library,.library-grid{grid-template-columns:repeat(2,1fr)}
  .lab-grid{grid-template-columns:1fr}.lab-main{grid-template-columns:1fr}
  .canvas-wrap{min-height:520px}
}
@media(max-width:680px){
  .nav{padding:12px 0;min-height:auto}.nav-actions{gap:0}.nav-btn{padding:9px}
  .shell{padding-top:20px}.hero-copy{padding-top:18px}h1{font-size:22vw}
  .hero-stage{min-height:350px}.library,.library-grid{grid-template-columns:1fr}
  .section-head,.page-head{display:block}.section-copy{margin-top:14px}
  .footer{flex-direction:column}.lab-main{grid-template-columns:1fr}.canvas-wrap{min-height:390px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .card:hover{transform:none}
}