:root {
    --bg: #030508;
    --bg2: #080c14;
    --bg3: #0d1220;
    --bg4: #131a2e;
    --text: #f1f5f9;
    --text2: #94a3b8;
    --text3: #64748b;
    --a1: #6366f1;
    --a2: #8b5cf6;
    --a3: #a855f7;
    --grad: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
    --brd: rgba(255,255,255,0.06);
    --brd2: rgba(255,255,255,0.1);
    --r: 12px;
    --rl: 16px;
    --rxl: 24px;
    --rf: 9999px;
    --tr: all 0.35s cubic-bezier(0.4,0,0.2,1);
    --font: 'Inter', -apple-system, sans-serif;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
::selection{background:var(--a1);color:#fff}
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg2)}
::-webkit-scrollbar-thumb{background:var(--grad);border-radius:4px}
a{text-decoration:none;color:inherit;transition:var(--tr)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.gt{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-weight:600;border-radius:var(--r);cursor:pointer;transition:var(--tr);border:none;font-size:0.95rem;font-family:var(--font);position:relative;overflow:hidden}
.bp{background:var(--grad);color:#fff;padding:14px 30px;box-shadow:0 4px 24px rgba(99,102,241,0.35)}
.bp:hover{transform:translateY(-2px);box-shadow:0 8px 40px rgba(99,102,241,0.5)}
.bo{background:transparent;color:var(--text);padding:14px 30px;border:1px solid var(--brd)}
.bo:hover{background:rgba(255,255,255,0.04);border-color:var(--a1);color:var(--a1)}
.bl{padding:16px 36px;font-size:1.05rem}

/* Header */
.hdr{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(3,5,8,0.95);border-bottom:1px solid var(--brd);padding:16px 0;transition:var(--tr)}
.hdr.sc{padding:10px 0;box-shadow:0 4px 30px rgba(0,0,0,0.4)}
.nav{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:1.4rem}
.logo-svg{width:38px;height:38px}
.la{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* Hero */
.hero{position:relative;overflow:hidden}
.hero canvas{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-content{position:relative;z-index:1}
.hbadge{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;background:rgba(99,102,241,0.08);border:1px solid rgba(99,102,241,0.2);border-radius:var(--rf);font-size:0.88rem;font-weight:500;color:#a5b4fc;margin-bottom:24px}
.bdot{width:6px;height:6px;background:#22c55e;border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.4}}
.htitle{font-size:3.5rem;line-height:1.05;font-weight:900;margin-bottom:24px;letter-spacing:-2px}
.hdesc{font-size:1.15rem;color:var(--text2);line-height:1.7;max-width:600px;margin:0 auto}

/* QR App */
.qr-app{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start;position:relative;z-index:1}
.qr-controls{background:var(--bg3);border:1px solid var(--brd);border-radius:var(--rxl);padding:32px;display:flex;flex-direction:column;gap:24px}
.qr-field label{display:block;font-size:0.85rem;font-weight:600;margin-bottom:8px;color:var(--text2)}
.qr-field textarea{width:100%;padding:14px 16px;background:var(--bg4);border:1px solid var(--brd);border-radius:var(--r);color:var(--text);font-size:0.95rem;font-family:var(--font);transition:var(--tr);outline:none;resize:vertical;min-height:80px}
.qr-field textarea:focus{border-color:var(--a1);box-shadow:0 0 0 3px rgba(99,102,241,0.15)}
.qr-field input[type=range]{width:100%;accent-color:var(--a1);cursor:pointer}
.qr-field span{font-size:0.85rem;color:var(--text3);margin-top:4px;display:block}
.qr-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.color-wrap{display:flex;align-items:center;gap:12px}
.color-wrap input[type=color]{width:48px;height:40px;border:1px solid var(--brd);border-radius:var(--r);cursor:pointer;background:transparent;padding:2px}
.color-wrap span{font-size:0.85rem;color:var(--text3);font-family:monospace}
.qr-presets label{display:block;font-size:0.85rem;font-weight:600;margin-bottom:10px;color:var(--text2)}
.preset-row{display:flex;gap:8px;flex-wrap:wrap}
.preset-btn{width:36px;height:36px;border-radius:var(--r);border:2px solid var(--brd);cursor:pointer;transition:var(--tr)}
.preset-btn:hover{transform:scale(1.1);border-color:var(--a1)}
.qr-actions{display:flex;gap:12px;flex-wrap:wrap}

/* QR Preview */
.qr-preview{position:sticky;top:100px}
.qr-preview-inner{background:var(--bg3);border:1px solid var(--brd);border-radius:var(--rxl);padding:40px;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;position:relative;overflow:hidden}
.qr-preview-inner::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at center,rgba(99,102,241,0.05) 0%,transparent 70%);pointer-events:none}
#qrCanvas{max-width:100%;border-radius:var(--r);display:none}
.qr-placeholder{color:var(--text3);font-size:1rem;text-align:center}

/* Features */
.features-sec{padding:80px 0;background:var(--bg2)}
.sh{text-align:center;margin-bottom:48px}
.stag{display:inline-block;padding:6px 16px;background:rgba(99,102,241,0.08);border:1px solid rgba(99,102,241,0.2);border-radius:var(--rf);font-size:0.82rem;font-weight:700;color:var(--a2);margin-bottom:18px;text-transform:uppercase;letter-spacing:1.5px}
.stitle{font-size:2.5rem;font-weight:900;letter-spacing:-1px}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.feat-card{background:var(--bg3);border:1px solid var(--brd);border-radius:var(--rl);padding:28px;text-align:center;transition:var(--tr)}
.feat-card:hover{transform:translateY(-4px);border-color:var(--brd2)}
.feat-icon{font-size:2.5rem;margin-bottom:16px}
.feat-card h3{font-size:1.1rem;margin-bottom:8px}
.feat-card p{color:var(--text2);font-size:0.9rem}

/* Footer */
.ftr{background:var(--bg2);padding:40px 0 24px;border-top:1px solid var(--brd)}
.ftr-bottom{text-align:center;color:var(--text3);font-size:0.88rem}

/* Animations */
.fu{opacity:0;transform:translateY(30px);transition:opacity 0.7s ease,transform 0.7s ease}
.fu.vis{opacity:1;transform:translateY(0)}

/* Responsive */
@media(max-width:900px){
    .qr-app{grid-template-columns:1fr}
    .qr-preview{position:static}
    .feat-grid{grid-template-columns:1fr 1fr}
    .htitle{font-size:2.5rem}
    .qr-row{grid-template-columns:1fr}
}
@media(max-width:480px){
    .feat-grid{grid-template-columns:1fr}
    .htitle{font-size:2rem}
    .qr-actions{flex-direction:column}
}