@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

body{font-family:'Inter',system-ui,sans-serif;background:#0f0f13;color:#e4e4e7;line-height:1.6;min-height:100vh}

.container{max-width:900px;margin:0 auto;padding:0 1.25rem}

/* Header */
.site-header{border-bottom:1px solid rgba(255,255,255,0.06);padding:1rem 0}
.site-header .container{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:0.5rem;text-decoration:none;color:#e4e4e7;font-weight:700;font-size:1.15rem}
.logo-icon{font-size:1.4rem;background:linear-gradient(135deg,#34d399,#10b981,#059669);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:800}
.site-header nav{display:flex;gap:1.5rem}
.site-header nav a{color:#a1a1aa;text-decoration:none;font-size:0.9rem;font-weight:500;transition:color 0.2s}
.site-header nav a:hover{color:#e4e4e7}

/* Hero */
.hero{text-align:center;padding:3rem 1.25rem 1.5rem}
.hero h1{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,#34d399,#10b981,#059669);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:0.5rem}
.hero p{color:#a1a1aa;font-size:1.05rem;max-width:550px;margin:0 auto}

/* Card */
.card{background:#1a1a2e;border:1px solid rgba(255,255,255,0.06);border-radius:1.25rem;padding:1.75rem;margin-bottom:1.5rem}

/* Tabs */
.tab-group{display:flex;gap:0.35rem;flex-wrap:wrap;margin-bottom:1.25rem}
.tab-btn{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.08);color:#a1a1aa;padding:0.5rem 1rem;border-radius:0.65rem;font-size:0.85rem;cursor:pointer;font-family:'Inter',sans-serif;font-weight:600;transition:all 0.2s}
.tab-btn.active{background:rgba(16,185,129,0.15);border-color:rgba(16,185,129,0.35);color:#34d399}
.tab-btn:hover{background:rgba(255,255,255,0.1)}

/* Input panels */
.input-panel{display:none}
.input-panel.active{display:block}
.input-panel label{display:block;font-weight:600;font-size:0.9rem;margin-bottom:0.35rem;color:#d4d4d8}
.input-panel input,.input-panel select,.input-panel textarea{width:100%;background:#0f0f13;border:1px solid rgba(255,255,255,0.1);border-radius:0.75rem;padding:0.75rem 1rem;color:#e4e4e7;font-family:'Inter',sans-serif;font-size:0.9rem;margin-bottom:0.75rem;transition:border-color 0.2s}
.input-panel input:focus,.input-panel select:focus,.input-panel textarea:focus{outline:none;border-color:#10b981}
.input-panel select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a1a1aa'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1rem center}

/* QR Preview */
.qr-preview{display:flex;flex-direction:column;align-items:center;gap:1rem;margin-top:1.5rem;padding:1.5rem;background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.06);border-radius:1rem}
.qr-preview img{border-radius:0.5rem;background:#fff;padding:8px}
.qr-placeholder{width:200px;height:200px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,0.04);border:2px dashed rgba(255,255,255,0.1);border-radius:0.75rem;color:#71717a;font-size:0.9rem;text-align:center}

/* Controls row */
.controls-row{display:flex;gap:0.75rem;align-items:center;flex-wrap:wrap;margin-top:1rem}
.controls-row label{font-weight:600;font-size:0.85rem;color:#a1a1aa}
.controls-row select{background:#0f0f13;border:1px solid rgba(255,255,255,0.1);border-radius:0.6rem;padding:0.45rem 0.75rem;color:#e4e4e7;font-family:'Inter',sans-serif;font-size:0.85rem;cursor:pointer}

/* Buttons */
.btn-primary{background:linear-gradient(135deg,#10b981,#059669);color:#fff;border:none;padding:0.7rem 1.5rem;border-radius:0.75rem;font-weight:600;font-size:0.9rem;cursor:pointer;transition:opacity 0.2s;font-family:'Inter',sans-serif}
.btn-primary:hover{opacity:0.9}
.btn-secondary{background:rgba(255,255,255,0.06);color:#e4e4e7;border:1px solid rgba(255,255,255,0.1);padding:0.7rem 1.25rem;border-radius:0.75rem;font-weight:500;font-size:0.9rem;cursor:pointer;transition:all 0.2s;font-family:'Inter',sans-serif}
.btn-secondary:hover{background:rgba(255,255,255,0.1);border-color:rgba(255,255,255,0.15)}
.btn-download{background:rgba(16,185,129,0.1);border:1px solid rgba(16,185,129,0.25);color:#34d399;padding:0.55rem 1.25rem;border-radius:0.65rem;font-weight:600;font-size:0.85rem;cursor:pointer;transition:all 0.2s;font-family:'Inter',sans-serif}
.btn-download:hover{background:rgba(16,185,129,0.2)}

/* Content sections */
.content-section h2{font-size:1.5rem;font-weight:700;margin-bottom:1rem;color:#f4f4f5}
.content-section h3{font-size:1.1rem;font-weight:600;margin:1.25rem 0 0.5rem;color:#d4d4d8}
.content-section p{color:#a1a1aa;margin-bottom:0.75rem;font-size:0.95rem}
.content-section ul{list-style:disc;padding-left:1.5rem;color:#a1a1aa;margin-bottom:1rem}
.content-section ul li{margin-bottom:0.35rem;font-size:0.95rem}
.content-section details{background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.06);border-radius:0.75rem;padding:1rem;margin-bottom:0.5rem}
.content-section summary{font-weight:600;cursor:pointer;color:#d4d4d8}
.content-section details p{margin-top:0.5rem;margin-bottom:0}

/* Ad slots */
.ad-slot{min-height:90px;margin:1.5rem auto;text-align:center;max-width:728px}

/* Footer */
.site-footer{border-top:1px solid rgba(255,255,255,0.06);padding:2rem 0;margin-top:3rem}
.site-footer .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.site-footer p{color:#71717a;font-size:0.85rem}
.site-footer nav{display:flex;gap:1.5rem}
.site-footer nav a{color:#71717a;text-decoration:none;font-size:0.85rem;transition:color 0.2s}
.site-footer nav a:hover{color:#a1a1aa}

.hidden{display:none !important}

@media(max-width:640px){
    .hero h1{font-size:1.75rem}
    .site-header nav{display:none}
    .card{padding:1.25rem}
    .tab-group{gap:0.25rem}
    .tab-btn{padding:0.4rem 0.7rem;font-size:0.8rem}
    .site-footer .container{flex-direction:column;text-align:center}
}