:root{--primary-color:#007bff;--secondary-color:#6c757d;--success-color:#28a745;--danger-color:#dc3545;--warning-color:#ffc107;--info-color:#17a2b8;--light-color:#f8f9fa;--dark-color:#343a40;--border-radius:0.375rem;--box-shadow:0 0.125rem 0.25rem rgba(0,0,0,0.075);--transition:all 0.15s ease-in-out;--font-family-base:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-size-base:1rem;--line-height-base:1.5;}*{box-sizing:border-box;}body{font-family:var(--font-family-base);font-size:var(--font-size-base);line-height:var(--line-height-base);color:var(--dark-color);background-color:#fff;margin:0;padding:0;}a:focus,button:focus,input:focus,textarea:focus,select:focus{outline:2px solid var(--primary-color);outline-offset:2px;}.tool-container{background:#fff;border-radius:var(--border-radius);box-shadow:var(--box-shadow);padding:2rem;margin-bottom:2rem;border:1px solid #dee2e6;}.tool-title{color:var(--primary-color);font-weight:600;margin-bottom:1rem;font-size:1.75rem;}.form-control{border-radius:var(--border-radius);border:1px solid #ced4da;transition:var(--transition);}.form-control:focus{border-color:var(--primary-color);box-shadow:0 0 0 0.2rem rgba(0,123,255,0.25);}.btn{border-radius:var(--border-radius);font-weight:500;transition:var(--transition);border:none;padding:0.5rem 1rem;font-size:0.875rem;}.btn-primary{background-color:var(--primary-color);color:#fff;}.btn-primary:hover{background-color:#0056b3;transform:translateY(-1px);}.btn-secondary{background-color:var(--secondary-color);color:#fff;}.btn-secondary:hover{background-color:#545b62;}.copy-btn{background:var(--primary-color);color:#fff;border:none;border-radius:var(--border-radius);padding:0.25rem 0.5rem;font-size:0.75rem;cursor:pointer;transition:var(--transition);}.copy-btn:hover{background:#0056b3;transform:scale(1.05);}.result-container{background:var(--light-color);border-radius:var(--border-radius);padding:1.5rem;border:1px solid #dee2e6;}pre{background:#f8f9fa;border:1px solid #e9ecef;border-radius:var(--border-radius);padding:1rem;overflow-x:auto;font-family:'Monaco','Menlo','Ubuntu Mono',monospace;font-size:0.875rem;line-height:1.4;}code{background:#f8f9fa;padding:0.125rem 0.25rem;border-radius:0.25rem;font-family:'Monaco','Menlo','Ubuntu Mono',monospace;font-size:0.875em;}.navbar{box-shadow:0 2px 4px rgba(0,0,0,0.1);background:#fff !important;}.navbar-brand{font-weight:700;color:var(--primary-color) !important;font-size:1.25rem;}.nav-link{color:var(--dark-color) !important;font-weight:500;transition:var(--transition);}.nav-link:hover{color:var(--primary-color) !important;}.nav-link.active{color:var(--primary-color) !important;font-weight:600;}.dropdown-menu{border-radius:var(--border-radius);box-shadow:0 0.5rem 1rem rgba(0,0,0,0.15);border:1px solid rgba(0,0,0,0.15);}.dropdown-item{transition:var(--transition);}.dropdown-item:hover{background-color:var(--light-color);color:var(--primary-color);}.card{border-radius:var(--border-radius);box-shadow:var(--box-shadow);border:1px solid #dee2e6;transition:var(--transition);}.card:hover{transform:translateY(-2px);box-shadow:0 0.5rem 1rem rgba(0,0,0,0.15);}.card-title{color:var(--primary-color);font-weight:600;}.footer{background-color:var(--dark-color);color:#fff;padding:2rem 0;margin-top:3rem;}.footer a{color:#adb5bd;text-decoration:none;transition:var(--transition);}.footer a:hover{color:#fff;}@media (max-width:768px){.tool-container{padding:1rem;margin:1rem 0;}.tool-title{font-size:1.5rem;}.container{padding-left:1rem;padding-right:1rem;}}@media (max-width:576px){.tool-container{padding:0.75rem;}.btn{font-size:0.8rem;padding:0.4rem 0.8rem;}}.loading{display:inline-block;width:20px;height:20px;border:3px solid rgba(0,123,255,0.3);border-radius:50%;border-top-color:var(--primary-color);animation:spin 1s ease-in-out infinite;}@keyframes spin{to{transform:rotate(360deg);}}.tooltip{font-size:0.75rem;}.table{border-radius:var(--border-radius);overflow:hidden;}.table th{background-color:var(--light-color);font-weight:600;border-top:none;}.progress{border-radius:var(--border-radius);height:0.5rem;}.progress-bar{transition:width 0.3s ease;}.alert{border-radius:var(--border-radius);border:none;font-weight:500;}.alert-success{background-color:rgba(40,167,69,0.1);color:var(--success-color);}.alert-danger{background-color:rgba(220,53,69,0.1);color:var(--danger-color);}.alert-warning{background-color:rgba(255,193,7,0.1);color:#856404;}.alert-info{background-color:rgba(23,162,184,0.1);color:var(--info-color);}.will-change{will-change:transform;}@media print{.navbar,.footer,.btn,.copy-btn{display:none !important;}.tool-container{box-shadow:none;border:1px solid #000;}}