:root{--bg:#0a0a0a;--bg-card:#141414;--bg-hover:#1a1a1a;--border:#262626;--text:#e5e5e5;--text-dim:#a3a3a3;--primary:#f97316;--primary-hover:#fb923c;--primary-bg:rgba(249,115,22,.1);--radius:12px;--shadow:0 2px 8px rgba(0,0,0,.3)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column}
a{color:var(--primary);text-decoration:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.header{border-bottom:1px solid var(--border);padding:16px 0;background:var(--bg)}
.header .container{display:flex;justify-content:space-between;align-items:center}
.logo{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:700;color:var(--text)}
.nav{display:flex;gap:16px}
.nav-link{color:var(--text-dim);font-size:.9rem;transition:color .2s}
.nav-link:hover{color:var(--primary)}
.main{flex:1;padding:40px 0}
.hero{text-align:center;margin-bottom:48px}
.hero h1{font-size:2.5rem;margin-bottom:12px;background:linear-gradient(135deg,var(--primary),var(--primary-hover));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{color:var(--text-dim);font-size:1.1rem;max-width:600px;margin:0 auto}
.category{margin-bottom:40px}
.category h2{font-size:1.4rem;margin-bottom:4px;color:var(--text)}
.category-desc{color:var(--text-dim);font-size:.9rem;margin-bottom:20px}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.tool-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:all .2s;display:block;color:var(--text)}
.tool-card:hover{border-color:var(--primary);background:var(--bg-hover);transform:translateY(-2px);box-shadow:var(--shadow)}
.tool-icon{width:44px;height:44px;background:var(--primary-bg);border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:12px;color:var(--primary)}
.tool-card h3{font-size:1rem;margin-bottom:6px}
.tool-card p{color:var(--text-dim);font-size:.85rem;line-height:1.4}
.tool-header{margin-bottom:24px}
.back-link{color:var(--text-dim);font-size:.9rem;display:inline-block;margin-bottom:12px;transition:color .2s}
.back-link:hover{color:var(--primary)}
.tool-header h1{font-size:1.8rem;margin-bottom:8px}
.tool-header p{color:var(--text-dim)}
.tool-container{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.tool-content{padding:24px}
.qr-tool-panel{max-width:600px;margin:0 auto}
.input-section{margin-bottom:16px}
.input-section .form-group{margin-bottom:14px}
.input-section label{display:block;font-size:.85rem;color:var(--text-dim);margin-bottom:6px;font-weight:500}
.input-section input,.input-section select,.input-section textarea{width:100%;padding:10px 14px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:.9rem;outline:none;transition:border-color .2s}
.input-section textarea{min-height:100px;resize:vertical;font-family:inherit}
.input-section input:focus,.input-section select:focus,.input-section textarea:focus{border-color:var(--primary)}
.input-row{display:flex;gap:12px}
.input-row .form-group{flex:1}
.action-bar{display:flex;justify-content:center;padding:16px;gap:10px}
.btn{padding:8px 16px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text);cursor:pointer;font-size:.85rem;transition:all .2s;display:inline-flex;align-items:center;gap:6px}
.btn:hover{border-color:var(--primary);color:var(--primary)}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:600}
.btn-primary:hover{background:var(--primary-hover);border-color:var(--primary-hover)}
.btn-sm{padding:5px 10px;font-size:.8rem}
.btn-lg{padding:12px 28px;font-size:1rem}
.output-section{text-align:center;padding:20px;min-height:100px}
.output-section canvas{max-width:100%;border-radius:8px;background:#fff;padding:16px}
.download-bar{display:flex;justify-content:center;gap:10px;padding:12px}
.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:40px;text-align:center;cursor:pointer;transition:all .2s}
.upload-zone:hover,.upload-zone.drag-over{border-color:var(--primary);background:var(--primary-bg)}
.upload-zone p{color:var(--text-dim);margin-top:8px}
.result-text{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-top:12px;font-family:monospace;font-size:.9rem;word-break:break-all}
.bulk-input{width:100%;min-height:120px;padding:14px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-family:monospace;font-size:.9rem;resize:vertical;outline:none}
.bulk-input:focus{border-color:var(--primary)}
.bulk-results{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px;margin-top:16px}
.bulk-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:12px;text-align:center}
.bulk-item canvas{max-width:100%;background:#fff;border-radius:4px;padding:8px}
.bulk-item p{font-size:.75rem;color:var(--text-dim);margin-top:6px;word-break:break-all}
.customize-panel{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.customize-preview{display:flex;flex-direction:column;align-items:center;gap:12px}
.color-input{display:flex;align-items:center;gap:8px}
.color-input input[type="color"]{width:40px;height:40px;border:none;border-radius:8px;cursor:pointer;background:none}
.color-input input[type="text"]{flex:1}
.toast{position:fixed;bottom:24px;right:24px;background:var(--primary);color:#fff;padding:12px 20px;border-radius:8px;font-weight:600;font-size:.9rem;opacity:0;transform:translateY(12px);transition:all .3s;z-index:100;pointer-events:none}
.toast.show{opacity:1;transform:translateY(0)}
.footer{border-top:1px solid var(--border);padding:20px 0;text-align:center;color:var(--text-dim);font-size:.85rem}
.footer-info{margin-bottom:12px;line-height:1.8}
.footer-info strong{color:var(--text)}
.footer-info a{color:var(--primary)}
.footer-social{margin-bottom:10px}
.footer-social a{color:var(--text-dim);margin:0 6px;transition:color .2s}
.footer-social a:hover{color:var(--primary)}
.footer-tech{font-size:.75rem;color:#475569;margin-bottom:10px}
.footer-links{margin-top:8px;font-size:.8rem}
.footer-links a{color:var(--text-dim);margin:0 6px}
.footer-links a:hover{color:var(--primary)}
@media(max-width:768px){
.hero h1{font-size:1.8rem}
.tools-grid{grid-template-columns:1fr}
.nav{gap:8px}.nav-link{font-size:.8rem}
.header .container{flex-wrap:wrap;gap:10px}
.input-row{flex-direction:column}
.customize-panel{grid-template-columns:1fr}
.bulk-results{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
}