/* ===========================================================
   NULLPOINT — Design tokens
   Display: Space Grotesk · Body: Inter · Mono: JetBrains Mono
   Palette: deep space navy + violet/cyan dual accent
=========================================================== */

:root{
  --bg:#0B0E17;
  --bg-elev:#121628;
  --bg-elev-2:#171c34;
  --text:#F1F2F6;
  --muted:#9096AD;
  --border:rgba(241,242,246,0.09);
  --violet:#7C5CFC;
  --violet-soft:rgba(124,92,252,0.14);
  --cyan:#3ED8C3;
  --cyan-soft:rgba(62,216,195,0.14);
  --amber:#FFB86B;
  --danger:#FF6B7A;
  --radius:18px;
  --radius-sm:10px;
  --shadow-glow:0 0 0 1px var(--border), 0 20px 60px -20px rgba(124,92,252,0.35);
  --font-display:'Space Grotesk', sans-serif;
  --font-body:'Inter', sans-serif;
  --font-mono:'JetBrains Mono', monospace;
}

[data-theme="light"]{
  --bg:#F5F6FB;
  --bg-elev:#FFFFFF;
  --bg-elev-2:#EEF0F9;
  --text:#12142A;
  --muted:#5B6079;
  --border:rgba(18,20,42,0.09);
  --violet-soft:rgba(124,92,252,0.10);
  --cyan-soft:rgba(62,216,195,0.12);
  --shadow-glow:0 0 0 1px var(--border), 0 20px 60px -20px rgba(124,92,252,0.18);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth; overflow-x:hidden;}
body{
  margin:0;
  overflow-x:hidden;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  -webkit-font-smoothing:antialiased;
  transition:background .2s ease, color .2s ease;
}
body::before{
  content:"";
  position:fixed; inset:0; z-index:-1; pointer-events:none;
  background:
    radial-gradient(600px 400px at 85% -5%, var(--violet-soft), transparent 60%),
    radial-gradient(500px 350px at 5% 10%, var(--cyan-soft), transparent 60%);
}
h1,h2,h3,h4{font-family:var(--font-display); margin:0; letter-spacing:-0.02em;}
p{margin:0; color:var(--muted); line-height:1.6;}
a{color:inherit; text-decoration:none;}
code, pre, .mono{font-family:var(--font-mono);}
button{font-family:inherit; cursor:pointer;}
::selection{background:var(--violet); color:#fff;}

.wrap{max-width:1180px; margin:0 auto; padding:0 24px;}

/* ---------- Glass surfaces ---------- */
.glass{
  background:linear-gradient(180deg, var(--bg-elev), var(--bg-elev-2));
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow-glow);
  backdrop-filter:blur(20px);
}

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
/* Backdrop blur is the most expensive paint op on mid/low-end phones — it forces a
   full repaint of everything behind the element on every scroll/animation frame.
   Desktop GPUs handle it fine; on small screens swap to a flat surface so scrolling
   and typing stay smooth. */
@media (max-width:768px){
  .glass{ backdrop-filter:none; background:var(--bg-elev-2); }
  .site-header{ backdrop-filter:none; background:var(--bg); }
}
.site-header .wrap{display:flex; align-items:center; justify-content:space-between; height:68px;}
.brand{display:flex; align-items:center; gap:10px; font-family:var(--font-display); font-weight:700; font-size:19px;}
.brand-mark{width:30px; height:30px; border-radius:9px; background:linear-gradient(135deg,var(--violet),var(--cyan)); position:relative; flex-shrink:0;}
.brand-mark::after{content:""; position:absolute; inset:8px; border-radius:4px; background:var(--bg);}
.nav-actions{display:flex; align-items:center; gap:10px;}
.theme-toggle{
  width:40px; height:40px; border-radius:50%; border:1px solid var(--border);
  background:var(--bg-elev); color:var(--text); display:flex; align-items:center; justify-content:center;
  font-size:16px; transition:transform .2s ease, border-color .2s ease;
}
.theme-toggle:hover{border-color:var(--violet); transform:rotate(15deg);}

.btn{
  display:inline-flex; align-items:center; gap:8px; justify-content:center;
  padding:11px 20px; border-radius:999px; font-weight:600; font-size:14px;
  border:1px solid var(--border); background:var(--bg-elev); color:var(--text);
  transition:transform .15s ease, border-color .15s ease, background .15s ease;
}
.btn:hover{transform:translateY(-1px); border-color:var(--violet);}
.btn-primary{
  background:linear-gradient(135deg,var(--violet),#5a3fe0); border:none; color:#fff;
  box-shadow:0 10px 30px -10px rgba(124,92,252,0.7);
}
.btn-primary:hover{filter:brightness(1.08);}
.btn-ghost{background:transparent;}
.btn-sm{padding:8px 14px; font-size:13px;}
.btn-block{width:100%;}
.btn:disabled{opacity:.5; cursor:not-allowed; transform:none;}

/* ---------- Hero ---------- */
.hero{padding:64px 0 40px;}
.hero-grid{display:grid; grid-template-columns:1.05fr 0.95fr; gap:48px; align-items:center;}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px; font-size:12px; font-weight:700;
  letter-spacing:.08em; text-transform:uppercase; color:var(--cyan);
  background:var(--cyan-soft); padding:7px 14px; border-radius:999px; margin-bottom:20px;
}
.hero h1{font-size:52px; line-height:1.06; margin-bottom:18px;}
.hero h1 em{font-style:normal; background:linear-gradient(135deg,var(--violet),var(--cyan)); -webkit-background-clip:text; background-clip:text; color:transparent;}
.hero p.lead{font-size:17px; max-width:520px; margin-bottom:28px;}
.hero-cta{display:flex; gap:12px; flex-wrap:wrap;}
.hero-stats{display:flex; gap:28px; margin-top:36px;}
.hero-stats div b{display:block; font-family:var(--font-display); font-size:22px;}
.hero-stats div span{font-size:12px; color:var(--muted);}

/* Live QR demo card — signature element */
.demo-card{padding:26px;}
.demo-card .demo-head{display:flex; justify-content:space-between; align-items:center; margin-bottom:16px;}
.demo-card .demo-head span{font-size:12px; color:var(--muted); text-transform:uppercase; letter-spacing:.08em;}
.demo-body{display:grid; grid-template-columns:1fr auto; gap:20px; align-items:center;}
.demo-input input{
  width:100%; padding:12px 14px; border-radius:var(--radius-sm); border:1px solid var(--border);
  background:var(--bg); color:var(--text); font-family:var(--font-mono); font-size:13px; margin-bottom:10px;
}
.demo-swatches{display:flex; gap:8px; margin-bottom:14px;}
.swatch{width:22px; height:22px; border-radius:50%; border:2px solid transparent; cursor:pointer;}
.swatch.active{border-color:var(--text);}
.qr-canvas-wrap{
  background:#fff; padding:14px; border-radius:14px; display:flex; align-items:center; justify-content:center;
  box-shadow:0 20px 40px -14px rgba(0,0,0,.5);
}
.qr-canvas-wrap canvas, .qr-canvas-wrap img{display:block; width:150px; height:150px;}

/* ---------- Section headers ---------- */
.section{padding:56px 0;}
.section-head{display:flex; justify-content:space-between; align-items:flex-end; margin-bottom:28px; gap:20px; flex-wrap:wrap;}
.section-head h2{font-size:30px;}
.section-head p{max-width:460px;}
.pill-row{display:flex; gap:8px; flex-wrap:wrap; margin-bottom:26px;}
.pill{
  padding:8px 16px; border-radius:999px; border:1px solid var(--border); font-size:13px; font-weight:600;
  color:var(--muted); background:var(--bg-elev);
}
.pill.active{color:#fff; background:var(--violet); border-color:var(--violet);}

/* ---------- Tool grid ---------- */
.tool-grid{display:grid; grid-template-columns:repeat(auto-fill, minmax(230px,1fr)); gap:16px;}
.tool-card{
  padding:20px; cursor:pointer; transition:transform .18s ease, border-color .18s ease;
  display:flex; flex-direction:column; gap:12px; min-height:150px;
}
.tool-card:hover{transform:translateY(-4px); border-color:var(--violet);}
.tool-icon{
  width:38px; height:38px; border-radius:10px; display:flex; align-items:center; justify-content:center;
  background:var(--violet-soft); color:var(--violet); font-size:18px;
}
.tool-card h4{font-size:16px;}
.tool-card p{font-size:13px;}
.tool-card .cat-tag{font-size:11px; color:var(--cyan); text-transform:uppercase; letter-spacing:.06em; font-weight:700;}

/* ---------- Tool workspace (full tool view) ---------- */
.tool-view{padding:40px 0 80px;}
.tool-header{display:flex; justify-content:space-between; align-items:center; margin-bottom:24px; gap:16px; flex-wrap:wrap;}
.back-link{display:inline-flex; align-items:center; gap:6px; color:var(--muted); font-size:14px; font-weight:600;}
.back-link:hover{color:var(--text);}
.tool-title h2{font-size:26px; display:flex; align-items:center; gap:10px;}
.tool-title p{margin-top:4px;}
.tool-layout{display:grid; grid-template-columns:1.1fr 0.9fr; gap:24px; align-items:start;}
.panel{padding:24px;}
.panel + .panel{margin-top:16px;}
.field{margin-bottom:16px;}
.field label{display:block; font-size:13px; font-weight:600; margin-bottom:7px; color:var(--muted);}
.field input[type=text], .field input[type=number], .field input[type=email], .field input[type=tel],
.field input[type=password], .field select, .field textarea{
  width:100%; padding:11px 13px; border-radius:var(--radius-sm); border:1px solid var(--border);
  background:var(--bg); color:var(--text); font-family:var(--font-body); font-size:14px;
}
.field textarea{font-family:var(--font-mono); resize:vertical; min-height:120px;}
.field input[type=color]{width:48px; height:38px; border:1px solid var(--border); border-radius:8px; background:var(--bg); padding:2px;}
.field input[type=file]{
  width:100%; padding:10px; border-radius:var(--radius-sm); border:1px solid var(--border);
  background:var(--bg); color:var(--muted); font-size:13px;
}
.field input[type=file]::file-selector-button{
  padding:8px 14px; margin-right:12px; border:none; border-radius:8px; font-weight:600; font-size:13px;
  background:var(--violet); color:#fff; cursor:pointer;
}
.field input[type=file]::file-selector-button:hover{ filter:brightness(1.1); }
.field select{
  appearance:none; -webkit-appearance:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239096AD' stroke-width='2'><path d='M6 9l6 6 6-6'/></svg>");
  background-repeat:no-repeat; background-position:right 12px center; background-size:16px; padding-right:36px;
}
.row{display:flex; gap:12px;}
.row > *{flex:1;}
.grid-2{display:grid; grid-template-columns:1fr 1fr; gap:12px;}
.tabs{display:flex; gap:6px; margin-bottom:18px; flex-wrap:wrap;}
.tab{padding:8px 14px; border-radius:999px; font-size:13px; font-weight:600; border:1px solid var(--border); color:var(--muted); background:var(--bg-elev);}
.tab.active{color:#fff; background:var(--violet); border-color:var(--violet);}
.output-box{
  background:var(--bg); border:1px solid var(--border); border-radius:var(--radius-sm);
  padding:14px; font-family:var(--font-mono); font-size:13px; white-space:pre-wrap; word-break:break-all;
  max-height:340px; overflow:auto;
}
.stat-row{display:flex; gap:18px; margin-top:10px; flex-wrap:wrap;}
.stat-row div{text-align:center;}
.stat-row b{display:block; font-family:var(--font-display); font-size:20px;}
.stat-row span{font-size:11px; color:var(--muted); text-transform:uppercase;}
.hint{font-size:12px; color:var(--muted); margin-top:8px;}
.badge{display:inline-block; padding:3px 9px; border-radius:6px; font-size:11px; font-weight:700; background:var(--violet-soft); color:var(--violet);}
.badge.soon{background:var(--cyan-soft); color:var(--cyan);}
.dropzone{
  border:1.5px dashed var(--border); border-radius:var(--radius-sm); padding:32px; text-align:center;
  color:var(--muted); font-size:14px; cursor:pointer; transition:border-color .2s ease;
}
.dropzone:hover, .dropzone.drag{border-color:var(--violet); color:var(--text);}
.file-preview{display:flex; align-items:center; gap:10px; font-size:13px; margin-top:10px;}
.file-preview img{width:44px; height:44px; object-fit:cover; border-radius:8px;}
.color-preview{width:100%; height:56px; border-radius:var(--radius-sm); border:1px solid var(--border); margin-bottom:10px;}
.palette-row{display:flex; border-radius:var(--radius-sm); overflow:hidden; height:64px; margin-bottom:8px;}
.palette-row div{flex:1; display:flex; align-items:flex-end; padding:6px; font-size:10px; font-family:var(--font-mono); color:rgba(255,255,255,.85);}
.list-item{display:flex; align-items:center; justify-content:space-between; padding:10px 12px; border:1px solid var(--border); border-radius:var(--radius-sm); margin-bottom:8px; font-size:13px;}
.icon-btn{background:none; border:none; color:var(--muted); font-size:15px;}
.icon-btn:hover{color:var(--danger);}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--border); padding:44px 0 30px; margin-top:60px;}
.footer-grid{display:grid; grid-template-columns:1.4fr repeat(3,1fr); gap:24px;}
.footer-grid h5{font-size:13px; margin-bottom:12px; color:var(--muted); text-transform:uppercase; letter-spacing:.06em;}
.footer-grid a{display:block; font-size:14px; color:var(--muted); padding:5px 0;}
.footer-grid a:hover{color:var(--text);}
.footer-bottom{margin-top:30px; padding-top:20px; border-top:1px solid var(--border); display:flex; justify-content:space-between; font-size:13px; color:var(--muted); flex-wrap:wrap; gap:10px;}

/* ---------- Toast ---------- */
#toast{
  position:fixed; bottom:24px; left:50%; transform:translateX(-50%) translateY(20px);
  background:var(--text); color:var(--bg); padding:12px 22px; border-radius:999px; font-size:13px; font-weight:600;
  opacity:0; pointer-events:none; transition:opacity .2s ease, transform .2s ease; z-index:200;
  max-width:88vw; text-align:center; box-shadow:0 12px 30px -8px rgba(0,0,0,.5);
}
#toast.show{opacity:1; transform:translateX(-50%) translateY(0);}
#toast.toast-download{background:linear-gradient(135deg,var(--violet),var(--cyan)); color:#fff;}

/* ---------- Responsive ---------- */

/* Tablet */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr; gap:32px;}
  .tool-layout{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr; gap:28px 20px;}
  .hero h1{font-size:38px;}
  .hero{padding:44px 0 32px;}
  .section{padding:44px 0;}
  .grid-2{grid-template-columns:1fr;}
}

/* Phone */
@media (max-width:640px){
  .wrap{padding:0 16px;}
  .footer-grid{grid-template-columns:1fr;}
  .demo-body{grid-template-columns:1fr; justify-items:center; text-align:center;}
  .demo-input{width:100%;}
  .demo-swatches{justify-content:center;}
  .hero h1{font-size:28px; line-height:1.15;}
  .hero p.lead{font-size:15px; margin-left:auto; margin-right:auto;}
  .eyebrow{font-size:11px;}
  .hero-cta{justify-content:center;}
  .hero-stats{justify-content:center; gap:20px; flex-wrap:wrap;}
  .section-head{flex-direction:column; align-items:flex-start;}
  .section-head h2{font-size:24px;}
  .tool-grid{grid-template-columns:repeat(auto-fill, minmax(150px,1fr)); gap:12px;}
  .tool-card{padding:16px; min-height:130px;}
  .tool-header{flex-direction:column; align-items:flex-start; gap:10px;}
  .tool-title h2{font-size:21px; flex-wrap:wrap;}
  .panel{padding:18px;}
  .row{flex-wrap:wrap;}
  .row > *{flex:1 1 100%;}
  .stat-row{gap:14px; justify-content:center;}
  .qr-canvas-wrap canvas, .qr-canvas-wrap img{width:120px; height:120px;}
  .site-header .wrap{height:60px;}
  .brand{font-size:16px;}
  .btn{padding:12px 18px;} /* keep touch targets >=44px tall */
  .nav-actions .btn-sm{padding:10px 14px; font-size:13px;}
}

/* Touch-friendly minimum target sizes on any touch device */
@media (pointer:coarse){
  .btn, .tab, .pill, .theme-toggle, .icon-btn{ min-height:40px; }
  .swatch{ width:26px; height:26px; }
}

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