:root{--primary-color: #6366f1;--primary-hover: #4f46e5;--secondary-color: #10b981;--bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);--card-bg: rgba(255, 255, 255, .8);--glass-border: 1px solid rgba(255, 255, 255, .3);--text-color: #1f2937;--text-muted: #6b7280;--radius: 16px;--shadow: 0 8px 32px 0 rgba(31, 38, 135, .15);--backdrop-blur: blur(8px)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background:linear-gradient(-45deg,#ee7752,#e73c7e,#23a6d5,#23d5ab);background-size:400% 400%;animation:gradient 15s ease infinite;color:var(--text-color);line-height:1.5;min-height:100vh}@keyframes gradient{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.tabs{display:flex;gap:.5rem;margin-bottom:1.5rem;overflow-x:auto;padding-bottom:.5rem}.tab-btn{padding:.5rem 1rem;border:none;background:#0000000d;border-radius:20px;cursor:pointer;font-weight:500;color:var(--text-muted);transition:all .2s;white-space:nowrap}.tab-btn.active{background:var(--primary-color);color:#fff;box-shadow:0 4px 6px -1px #4f46e54d}textarea{width:100%;padding:.75rem;border:1px solid var(--border-color);border:var(--glass-border);border-radius:8px;font-family:inherit;resize:vertical;min-height:80px;margin-bottom:.5rem}select{width:100%;padding:.75rem;border:var(--glass-border);border-radius:8px;background:#fff}.hidden{display:none}.customization-section{margin-top:2rem;padding-top:2rem;border-top:1px solid rgba(0,0,0,.1)}.customization-section h3{margin-bottom:1rem;font-size:1.1rem}.presets{margin-top:1rem}.presets label{display:block;margin-bottom:.5rem;font-size:.875rem;font-weight:500}.preset-colors{display:flex;gap:.5rem}.preset-btn{width:32px;height:32px;border-radius:50%;border:2px solid white;cursor:pointer;box-shadow:0 2px 4px #0000001a;transition:transform .2s}.preset-btn:hover{transform:scale(1.1)}.container{max-width:1200px;margin:0 auto;padding:0 1rem;width:100%}.footer{text-align:center;padding:2rem 0;color:#fff;font-size:.875rem;margin-top:auto;width:100%}#toast-container{position:fixed;bottom:2rem;right:2rem;display:flex;flex-direction:column;gap:1rem;z-index:1000}.toast{background:#ffffffe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:1rem 1.5rem;border-radius:8px;box-shadow:0 4px 12px #00000026;display:flex;align-items:center;gap:.5rem;animation:slideIn .3s ease-out;min-width:250px;border-left:4px solid var(--primary-color)}.toast.error{border-left-color:#dc2626}.toast.success{border-left-color:#10b981}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes fadeOut{0%{opacity:1}to{opacity:0}}.header{background-color:var(--card-bg);box-shadow:0 1px 3px #0000001a;padding:1rem 0;margin-bottom:2rem}.logo h1{font-size:1.5rem;font-weight:700;color:var(--text-color)}.highlight{color:var(--primary-color)}.ad-container{display:flex;justify-content:center;align-items:center;margin:2rem 0;background-color:#e5e7eb;border:1px dashed #9ca3af;color:#6b7280;font-size:.875rem}.ad-banner{height:90px;width:100%;max-width:728px;margin:2rem auto}.ad-sidebar{height:250px;width:100%;max-width:300px;margin:0 auto}.main-content{display:grid;grid-template-columns:1fr;gap:2rem}@media(min-width:768px){.main-content{grid-template-columns:2fr 1fr}}.card{background:var(--card-bg);backdrop-filter:var(--backdrop-blur);-webkit-backdrop-filter:var(--backdrop-blur);border:var(--glass-border);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow);margin-bottom:2rem}.card h2{margin-bottom:1.5rem;font-size:1.25rem;font-weight:600}.input-group{margin-bottom:1.5rem}.input-group label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-color)}.input-group input[type=text]{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:8px;font-size:1rem;transition:border-color .2s}.input-group input[type=text]:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #4f46e51a}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.input-group input[type=color]{width:100%;height:48px;padding:.25rem;border:1px solid var(--border-color);border-radius:8px;cursor:pointer}.btn{display:inline-flex;justify-content:center;align-items:center;padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:1rem;font-weight:500;cursor:pointer;transition:background-color .2s,transform .1s;width:100%}.btn:active{transform:translateY(1px)}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-secondary{background-color:var(--secondary-color);color:#fff}.btn-secondary:disabled{background-color:#9ca3af;cursor:not-allowed}.preview-section{display:flex;flex-direction:column;align-items:center;justify-content:center}#qr-canvas-container{margin-bottom:1.5rem;padding:1rem;background:#fff;border:1px solid var(--border-color);border-radius:8px}.btn-outline{background-color:transparent;border:2px solid var(--primary-color);color:var(--primary-color)}.btn-outline:hover{background-color:var(--primary-color);color:#fff}.btn-outline:disabled{border-color:#9ca3af;color:#9ca3af;cursor:not-allowed;background-color:transparent}.actions{display:flex;gap:.5rem;width:100%;margin-top:1rem}.history-card h3{margin-bottom:1rem;font-size:1.1rem;font-weight:600}#history-list{list-style:none}#history-list li{padding:.75rem;border-bottom:1px solid rgba(0,0,0,.05);cursor:pointer;transition:background-color .2s;border-radius:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#history-list li:hover{background-color:#00000008}#history-list li.empty-history{color:var(--text-muted);font-style:italic;cursor:default}