:root{
  --bg:#0b0b0b;
  --muted:#9aa0a6;
  --accent:#ffffff;
  --container:1100px;
  --gap:12px;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;
  color-scheme: dark;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--accent);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.4;
}

.container{max-width:var(--container);margin:0 auto;padding:24px}

.site-header{background:#0f1112;border-bottom:1px solid rgba(255,255,255,0.03)}
.header-inner{display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:600;color:var(--accent);text-decoration:none}
.top-nav a{color:var(--muted);text-decoration:none;margin-left:16px;font-size:14px}

.hero{padding:36px 0}
.lede{color:var(--muted);max-width:60ch}

.tool{margin-top:20px}
.controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.presets{display:flex;gap:8px;flex-wrap:wrap}
.preset{width:44px;height:36px;border-radius:6px;border:1px solid rgba(255,255,255,0.06);cursor:pointer}
.color-picker-label{display:flex;align-items:center;gap:8px;color:var(--muted)}
.color-picker-label input[type="color"]{width:44px;height:36px;border:0;padding:0;background:none;cursor:pointer}
.color-picker-label input[type="text"]{width:90px;padding:6px;border-radius:6px;border:1px solid rgba(255,255,255,0.06);background:#0b0b0b;color:var(--accent)}

.actions{display:flex;gap:8px;flex-wrap:wrap;margin-left:auto}
button{background:transparent;color:var(--accent);border:1px solid rgba(255,255,255,0.06);padding:8px 12px;border-radius:8px;cursor:pointer}
button.primary{background:#fff;color:#000;border:0}
button.secondary{background:rgba(255,255,255,0.03)}

.faq{margin-top:36px}
.faq dt{font-weight:600;margin-top:12px}
.faq dd{margin:6px 0 12px;color:var(--muted)}

.site-footer{border-top:1px solid rgba(255,255,255,0.03);padding:18px 0;margin-top:36px;color:var(--muted);font-size:13px}

/* Fullscreen overlay */
.overlay{
  position:fixed;inset:0;display:none;align-items:center;justify-content:center;
  transition:background-color 300ms linear;
}
.overlay[aria-hidden="false"]{display:flex}
.overlay-exit{
  position:fixed;top:12px;right:12px;z-index:1001;padding:8px 10px;border-radius:8px;border:0;background:rgba(0,0,0,0.35);color:#fff;backdrop-filter:blur(4px)
}
.overlay-message{position:fixed;top:12px;left:12px;color:rgba(0,0,0,0.6);background:rgba(255,255,255,0.85);padding:8px 12px;border-radius:8px;font-weight:600;display:none}
.overlay-message.show{display:block}

/* Responsive */
@media (max-width:720px){
  .header-inner{flex-direction:column;align-items:flex-start;gap:8px}
  .actions{width:100%;justify-content:flex-start}
}