:root{
  --ink:#0D0F14;
  --ink-soft:#161922;
  --paper:#F5F3EE;
  --muted:#8B8F98;
  --line: rgba(245,243,238,0.10);
  --accent-1:#7C5CFC;
  --accent-2:#34D8B8;
  --accent-3:#FF6B5E;
  --radius: 10px;
}
*{box-sizing:border-box; margin:0; padding:0;}
html,body{background:var(--ink); color:var(--paper); font-family:'Inter',sans-serif; -webkit-font-smoothing:antialiased;}
body{padding-bottom:80px;}
::selection{background:var(--accent-1); color:#fff;}
.mono{font-family:'JetBrains Mono',monospace;}
.display{font-family:'Space Grotesk',sans-serif;}
a{color:inherit;}

.spectrum-bar{
  position:sticky; top:0; z-index:50; height:4px; width:100%;
  background: linear-gradient(90deg, var(--accent-3), var(--accent-1), var(--accent-2), var(--accent-1), var(--accent-3));
  background-size: 200% 100%;
  animation: driftSpectrum 12s linear infinite;
}
@keyframes driftSpectrum{ from{background-position:0% 0;} to{background-position:200% 0;} }

header{display:flex; align-items:center; justify-content:space-between; padding:24px 48px; border-bottom:1px solid var(--line);}
.logo{display:flex; align-items:center; gap:10px; font-family:'Space Grotesk'; font-weight:700; font-size:19px; letter-spacing:-0.02em; text-decoration:none;}
.logo .dot{width:9px; height:9px; border-radius:50%; background:linear-gradient(135deg, var(--accent-1), var(--accent-2)); flex-shrink:0;}
nav{display:flex; gap:32px; font-size:14px; color:var(--muted); align-items:center;}
nav a{color:var(--muted); text-decoration:none; transition:color .15s;}
nav a:hover, nav a.active{color:var(--paper);}

main{max-width:1180px; margin:0 auto; padding:0 48px;}

.btn{background:var(--paper); color:var(--ink); border:none; padding:12px 22px; border-radius:var(--radius); font-family:'Inter'; font-weight:600; font-size:14px; cursor:pointer; transition:transform .12s, opacity .12s;}
.btn:hover{transform:translateY(-1px); opacity:.9;}
.btn-ghost{background:transparent; border:1px solid var(--line); color:var(--paper);}
.btn:disabled{opacity:.5; cursor:not-allowed; transform:none;}

.eyebrow{font-family:'JetBrains Mono'; font-size:12px; color:var(--accent-2); letter-spacing:.08em; text-transform:uppercase; margin-bottom:14px; display:block;}
h1{font-family:'Space Grotesk'; font-weight:700; font-size:clamp(32px,4.5vw,52px); line-height:1.05; letter-spacing:-0.03em;}
h1 span{background:linear-gradient(120deg, var(--accent-1), var(--accent-2)); -webkit-background-clip:text; background-clip:text; color:transparent;}
.sub{color:var(--muted); font-size:16px; max-width:560px; margin-top:16px; line-height:1.55;}

section{padding:44px 0; border-bottom:1px solid var(--line);}
.section-head{display:flex; align-items:baseline; justify-content:space-between; margin-bottom:22px; flex-wrap:wrap; gap:8px;}
.section-head h2{font-family:'Space Grotesk'; font-size:21px; font-weight:600; letter-spacing:-0.01em;}
.note{color:var(--muted); font-size:13px; font-family:'JetBrains Mono';}

.shade-strip{display:flex; border-radius:14px; overflow:hidden; border:1px solid var(--line);}
.shade{flex:1; min-height:96px; display:flex; flex-direction:column; justify-content:flex-end; padding:10px 12px; cursor:pointer; position:relative; transition:flex .2s;}
.shade:hover{flex:1.4;}
.shade .step{font-family:'JetBrains Mono'; font-size:11px; font-weight:500; opacity:.85;}
.shade .hex{font-family:'JetBrains Mono'; font-size:10.5px; opacity:.7; margin-top:2px;}
.shade .badge{position:absolute; top:8px; right:8px; font-family:'JetBrains Mono'; font-size:9px; padding:2px 6px; border-radius:20px; background:rgba(0,0,0,0.18);}

.toast{position:fixed; bottom:28px; left:50%; transform:translateX(-50%) translateY(20px); background:var(--paper); color:var(--ink); padding:10px 18px; border-radius:30px; font-family:'JetBrains Mono'; font-size:12px; opacity:0; transition:all .25s; pointer-events:none; z-index:100;}
.toast.show{opacity:1; transform:translateX(-50%) translateY(0);}

.gallery-grid{display:grid; grid-template-columns:repeat(auto-fill, minmax(240px,1fr)); gap:16px;}
.gallery-card{border:1px solid var(--line); border-radius:14px; overflow:hidden; text-decoration:none; background:var(--ink-soft); display:block; transition:transform .15s, border-color .15s;}
.gallery-card:hover{transform:translateY(-3px); border-color:var(--accent-1);}
.gallery-swatch{display:flex; height:64px;}
.gallery-swatch div{flex:1;}
.gallery-meta{padding:14px 16px;}
.gallery-meta .name{font-family:'Space Grotesk'; font-size:14px; font-weight:600;}
.gallery-meta .stats{font-family:'JetBrains Mono'; font-size:11px; color:var(--muted); margin-top:4px;}

.modal-overlay{position:fixed; inset:0; background:rgba(0,0,0,0.6); display:flex; align-items:center; justify-content:center; z-index:200;}
.modal{background:var(--ink-soft); border:1px solid var(--line); border-radius:16px; padding:32px; width:340px;}
.modal h3{font-family:'Space Grotesk'; margin-bottom:18px;}
.modal input{width:100%; background:var(--ink); border:1px solid var(--line); color:var(--paper); padding:11px 14px; border-radius:8px; margin-bottom:12px; font-family:'Inter'; font-size:14px; outline:none;}
.modal input:focus{border-color:var(--accent-1);}
.modal-actions{display:flex; gap:10px; margin-top:6px;}
.modal-error{color:var(--accent-3); font-size:12px; margin-bottom:10px; font-family:'JetBrains Mono';}
.modal-switch{margin-top:14px; font-size:12px; color:var(--muted); text-align:center; cursor:pointer;}

footer{padding:36px 48px; text-align:center; color:var(--muted); font-size:13px; font-family:'JetBrains Mono';}

@media(max-width:820px){
  header{padding:18px 20px;} main{padding:0 20px;}
  nav{gap:18px;}
}