*{margin:0;padding:0;box-sizing:border-box}main{flex:1;padding:20px}main.container{display:block;max-width:1400px;width:100%;margin:0 auto;padding:40px 20px;background-color:var(--primary-bg-color);border-radius:12px;box-shadow:0 8px 25px rgba(0,0,0,0.1)}main h1{color:var(--primary-text-color);font-size:2.5rem;margin-bottom:10px;text-align:center}main .subtitle{color:var(--secondary-text-color);text-align:center;margin-bottom:30px;font-size:1.1rem}main h3{color:var(--primary-text-color);font-size:1.1rem;margin-bottom:15px}.tool-layout{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-bottom:30px}.input-section,.preview-section{background:var(--input-bg-color);padding:25px;border-radius:12px;box-shadow:0 10px 40px rgba(0,0,0,0.1);border:1px solid var(--input-border-color)}.form-group{margin-bottom:20px}.form-group label{display:block;color:var(--primary-text-color);font-weight:600;margin-bottom:8px;font-size:0.95rem}.form-group input[type="text"],.form-group input[type="url"],.form-group input[type="email"],.form-group input[type="tel"],.form-group textarea,.form-group select{width:100%;padding:10px;border:1px solid var(--input-border-color);border-radius:6px;background:var(--input-bg-color);color:var(--input-text-color);font-size:0.9rem}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--button-bg-color)}.form-group textarea{resize:vertical;font-family:inherit}.form-group small{color:var(--secondary-text-color);font-size:0.85rem}.qr-type-buttons{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.type-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:15px 10px;background:var(--input-bg-color);color:var(--primary-text-color);border:2px solid var(--input-border-color);border-radius:8px;cursor:pointer;transition:all 0.2s;font-size:0.85rem;font-weight:500}.type-btn:hover{border-color:var(--button-bg-color);background:var(--button-hover-bg-color)}.type-btn.active{background:var(--button-bg-color);color:var(--button-text-color);border-color:var(--button-bg-color)}.type-btn svg{stroke:currentColor}.input-container{display:none}.input-container:not(.hidden){display:block}.hidden{display:none!important}.customization-section{background:var(--header-bg-color);padding:15px;border-radius:8px;margin-bottom:20px;border:1px solid var(--input-border-color)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:15px}.color-input-group{display:flex;gap:10px;align-items:center}.color-input-group input[type="color"]{width:50px;height:35px;border:1px solid var(--input-border-color);border-radius:6px;cursor:pointer}.color-input-group input[type="text"]{flex:1}.form-group input[type="range"]{width:100%;cursor:pointer}.checkbox-label{display:flex;align-items:center;gap:8px;cursor:pointer;color:var(--primary-text-color);font-size:0.9rem}.checkbox-label input[type="checkbox"]{width:18px;height:18px;cursor:pointer}.generate-btn,.download-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;background:var(--button-bg-color);color:var(--button-text-color);border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all 0.2s}.generate-btn:hover,.download-btn:hover{background:var(--button-hover-bg-color);transform:translateY(-2px)}.download-btn.secondary{background:var(--input-bg-color);color:var(--primary-text-color);border:1px solid var(--input-border-color)}.download-btn.secondary:hover{background:var(--button-hover-bg-color)}.qr-preview{min-height:300px;background:var(--header-bg-color);border:2px dashed var(--input-border-color);border-radius:8px;display:flex;align-items:center;justify-content:center;padding:20px;margin-bottom:20px}.qr-preview canvas{max-width:100%;height:auto}.placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:15px;color:var(--secondary-text-color);text-align:center}.placeholder svg{stroke:var(--secondary-text-color);opacity:0.5}.download-section{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}.info-box{display:flex;gap:12px;padding:16px;background:var(--input-bg-color);border-radius:12px;font-size:0.9rem;color:var(--primary-text-color);box-shadow:0 4px 15px rgba(0,0,0,0.1);border:1px solid var(--input-border-color)}.info-box svg{flex-shrink:0;stroke:var(--button-bg-color)}.info-box strong{color:var(--button-bg-color)}@media (max-width:1024px){.tool-layout{grid-template-columns:1fr}.qr-type-buttons{grid-template-columns:repeat(2,1fr)}}@media (max-width:600px){main h1{font-size:2rem}main .subtitle{font-size:1rem}.qr-type-buttons{grid-template-columns:1fr 1fr}.form-row{grid-template-columns:1fr}}