:root{--bg-color: #ffffff;--text-color: #1a1a1a;--input-bg: #f5f7fa;--button-primary: #4f46e5;--button-primary-hover: #4338ca;--button-success: #059669;--button-success-hover: #047857;--button-danger: #dc2626;--button-danger-hover: #b91c1c;--button-neutral: #4b5563;--button-neutral-hover: #374151;--focus-outline: 2px solid #4f46e5;--focus-outline-offset: 2px;--border-color: #e5e7eb;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1)}[data-theme=dark]{--bg-color: #111827;--text-color: #f3f4f6;--input-bg: #1f2937;--button-primary: #6366f1;--button-primary-hover: #4f46e5;--button-success: #10b981;--button-success-hover: #059669;--button-danger: #ef4444;--button-danger-hover: #dc2626;--button-neutral: #6b7280;--button-neutral-hover: #4b5563;--focus-outline: 2px solid #6366f1;--border-color: #374151;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .3);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .3), 0 2px 4px -2px rgb(0 0 0 / 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24px;border-radius:8px;color:#fff;font-size:14px;font-weight:500;margin-bottom:8px;opacity:0;transition:all .3s ease-in-out;box-shadow:var(--shadow-md);border:none;visibility:hidden;display:flex;align-items:flex-start;gap:8px;max-width:300px;word-break:break-word;text-align:left}.toast-icon{font-size:18px;flex-shrink:0;margin-top:2px}.toast-message{flex-grow:1}.toast.show{opacity:1;visibility:visible}.toast.success{background-color:#28a745}.toast.info{background-color:#17a2b8}.toast.error{background-color:#dc3545}[data-theme=dark] .toast{box-shadow:0 4px 6px rgba(0,0,0,.4);border:1px solid rgba(255,255,255,.2)}.input-group{display:flex;flex-direction:column;align-items:center;gap:10px;margin-bottom:20px;width:100%;max-width:600px;margin-left:auto;margin-right:auto}@media (max-width: 768px){.input-group{gap:8px;margin-bottom:15px}input[type=url]{width:100%;padding:10px 15px;font-size:15px}button{padding:10px 20px;font-size:14px}}@media (max-width: 480px){.input-group{gap:6px;margin-bottom:10px}input[type=url]{padding:8px 12px;font-size:14px}button{padding:8px 16px;font-size:13px;min-height:40px}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.download-controls{display:flex;align-items:center;gap:8px;width:100%;max-width:300px;margin:0 auto;height:44px}.container{margin-top:80px;padding:0 15px}.qr-container{display:flex;flex-direction:column;align-items:center;margin-top:40px;margin-bottom:40px;position:relative;gap:25px;padding:20px}@media (max-width: 768px){.qr-container{margin-top:30px;margin-bottom:30px;gap:20px;padding:15px}}@media (max-width: 480px){.qr-container{margin-top:20px;margin-bottom:20px;gap:15px;padding:10px}}@keyframes qrCodeAppear{0%{opacity:0;transform:scale(.95);filter:brightness(1)}50%{opacity:1;transform:scale(1.05);filter:brightness(1.2)}to{opacity:1;transform:scale(1);filter:brightness(1)}}#qrcode{display:flex;justify-content:center;align-items:center;margin:20px 0;background-color:#fff;border-radius:12px;box-shadow:var(--shadow-sm);animation:qrCodeAppear .8s cubic-bezier(.4,0,.2,1) forwards;padding:10px}#qrcode img{display:block;max-width:100%;height:auto}[data-theme=dark] #qrcode{background-color:#fff;box-shadow:var(--shadow-md)}.url-display{font-size:14px;color:#555;word-break:break-all;max-width:256px;text-align:center;margin-bottom:15px;font-family:monospace;line-height:1.4;text-decoration:none;cursor:pointer;transition:color .2s 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reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.download-btn{height:44px;display:flex;align-items:center;justify-content:center}.encoding-warning{background-color:#fff3cd;border:1px solid #ffeeba;color:#856404;padding:1rem;border-radius:6px;margin-bottom:1.5rem;font-weight:500}[data-theme=dark] .encoding-warning{background-color:#382f00;border-color:#665c00;color:#fff3cd}.encoding-info{margin-top:2.5rem;padding:2rem;border-radius:12px;background-color:var(--input-bg);border:1px solid var(--border-color);box-shadow:var(--shadow-md);max-width:800px;margin-left:auto;margin-right:auto;text-align:left}.encoding-info.hidden{display:none}.encoding-details h3{margin:0 0 1rem;color:var(--text-color);font-size:1.25rem;border-bottom:2px solid var(--button-primary);padding-bottom:.5rem;display:inline-block}.encoding-details p{margin-bottom:1.5rem;color:var(--text-color);line-height:1.6;font-size:.95rem}.url-comparison{display:flex;flex-direction:column;gap:1.25rem;background-color:var(--bg-color);padding:1.25rem;border-radius:8px;border:1px solid var(--border-color)}.url-item{display:flex;flex-direction:column;gap:.5rem}.url-item strong{color:var(--text-color);font-size:.9rem;text-transform:uppercase;letter-spacing:.5px}.url-text{padding:.75rem;background-color:var(--input-bg);border:1px solid var(--border-color);border-radius:6px;word-break:break-all;font-family:monospace;font-size:.9em;line-height:1.4}.url-item small{color:var(--button-neutral);font-style:italic;font-size:.8rem;margin-top:.25rem}.url-item a.url-text{color:var(--button-primary);text-decoration:none;transition:all .2s ease}.url-item a.url-text:hover{text-decoration:none;border-color:var(--button-primary);box-shadow:var(--shadow-sm)}.changes-list{margin:1.5rem 0;padding:1rem;background-color:var(--bg-color);border-radius:6px;border:1px solid var(--border-color)}.changes-list p{margin-bottom:.75rem!important;color:var(--text-color)}.changes-list ul{margin:0;padding-left:1.5rem;list-style-type:none}.changes-list li{position:relative;padding:.25rem 0;color:var(--text-color);line-height:1.5}.changes-list li:before{content:"•";position:absolute;left:-1rem;color:var(--button-primary)}.encoding-confirm{margin-top:2rem;padding:2rem;border-radius:12px;background-color:var(--surface-color);border:2px solid var(--button-primary);box-shadow:var(--shadow-md);max-width:800px;margin-left:auto;margin-right:auto;text-align:left}.encoding-confirm .encoding-warning{background-color:#fff3cd;border:1px solid #ffeeba;color:#856404;padding:1rem;border-radius:6px;margin-bottom:1.5rem;font-weight:500}[data-theme=dark] .encoding-confirm .encoding-warning{background-color:#382f00;border-color:#665c00;color:#fff3cd}.encoding-confirm .changes-list{margin:1.5rem 0;padding:1rem;background-color:var(--background-color);border-radius:6px;border:1px solid var(--border-color)}.encoding-confirm .changes-list p{margin-bottom:.75rem!important;color:var(--text-color)}.encoding-confirm .changes-list ul{margin:0;padding-left:1.5rem;list-style-type:none}.encoding-confirm .changes-list li{position:relative;padding:.25rem 0;color:var(--text-color);line-height:1.5}.encoding-confirm .changes-list li:before{content:"•";position:absolute;left:-1rem;color:var(--button-primary)}.encoding-confirm .url-comparison{display:flex;flex-direction:column;gap:1.25rem;background-color:var(--background-color);padding:1.25rem;border-radius:8px;border:1px solid var(--border-color)}.encoding-confirm .url-item{display:flex;flex-direction:column;gap:.5rem}.encoding-confirm .url-text{padding:.75rem;background-color:var(--input-bg);border:1px solid var(--border-color);border-radius:6px;word-break:break-all;font-family:monospace;font-size:.9em;line-height:1.4}.encoding-confirm .url-item a.url-text{color:var(--button-primary);text-decoration:none;transition:all .2s 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h2{margin:0;color:var(--text-color)}.close-modal{background:none;border:none;font-size:24px;cursor:pointer;color:var(--text-color);padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:4px}.close-modal:hover{background-color:var(--input-bg)}.modal-body{padding:24px;max-height:70vh;overflow-y:auto}.history-table-container{overflow-x:auto;max-height:60vh;overflow-y:auto}.history-table{width:100%;border-collapse:collapse;margin-top:16px}.history-table th,.history-table td{padding:12px;text-align:left;border-bottom:1px solid var(--border-color)}.history-table th{background-color:var(--input-bg);font-weight:600}.history-table tbody tr:nth-child(2n){background-color:var(--input-bg)}.history-table tbody tr:hover{background-color:var(--button-primary);color:#fff}.history-table a{color:var(--button-primary);text-decoration:none;word-break:break-all}.history-table a:hover{text-decoration:underline}.history-table tr:hover a{color:#fff}.history-table 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