html,body{color:#333;background-color:#f5f5f5;height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6}#app{height:100%}h1,h2,h3,h4,h5,h6{color:#2c3e50;margin-bottom:1rem;font-weight:600}h1{font-size:2.5rem}h2{border-bottom:2px solid #eaeaea;margin-top:2rem;padding-bottom:.5rem;font-size:2rem}h3{margin-top:1.5rem;font-size:1.5rem}h4{margin-top:1.25rem;font-size:1.25rem}p{margin-bottom:1rem}input,textarea,select{border:1px solid #ddd;border-radius:4px;width:100%;padding:.75rem;font-size:1rem;transition:border-color .3s}input:focus,textarea:focus,select:focus{border-color:#667eea;outline:none;box-shadow:0 0 0 2px #667eea33}textarea{resize:vertical;min-height:100px}button{cursor:pointer;border:none;border-radius:4px;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;transition:all .3s}button:hover{transform:translateY(-1px);box-shadow:0 2px 4px #0000001a}button:active{transform:translateY(0)}.card{background:#fff;border-radius:8px;margin-bottom:1.5rem;padding:1.5rem;box-shadow:0 2px 4px #0000001a}@media (width<=768px){h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1.1rem}.card{padding:1rem}}*{box-sizing:border-box;margin:0;padding:0}body{color:#333;background-color:#f5f5f5;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6}.app{flex-direction:column;min-height:100vh;display:flex}.header{color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);padding:2rem;box-shadow:0 2px 4px #0000001a}.header-content{justify-content:space-between;align-items:center;width:100%;max-width:1200px;margin:0 auto;display:flex}.header-text{flex:1}.header h1{margin-bottom:.5rem;font-size:2.5rem;font-weight:700}.header p{opacity:.9;font-size:1.2rem}.header-actions{align-items:center;display:flex}:global(.dark) .header{background:linear-gradient(135deg,#2d3748 0%,#4a5568 100%)}:global(.dark) .nav{background:#1a202c;box-shadow:0 2px 4px #0000004d}:global(.dark) .nav li{color:#e2e8f0}:global(.dark) .nav li:hover{background:#2d3748}:global(.dark) .nav li.active{background:#2d3748;border-bottom-color:#667eea}:global(.dark) body{color:#e2e8f0;background-color:#1a202c}:global(.dark) .main{background-color:#1a202c}:global(.dark) .data-management{background:#2d3748;box-shadow:0 -2px 4px #0000004d}:global(.dark) .footer{background:#1a202c;box-shadow:0 -2px 4px #0000004d}.nav{z-index:100;background:#fff;position:sticky;top:0;box-shadow:0 2px 4px #0000001a}.nav ul{justify-content:center;max-width:1000px;margin:0 auto;list-style:none;display:flex}.nav li{text-align:center;cursor:pointer;border-bottom:3px solid #0000;flex:1;padding:1rem;transition:all .3s}.nav li:hover{background:#f8f9fa}.nav li.active{background:#f8f9fa;border-bottom-color:#667eea;font-weight:600}.nav-icon{margin-bottom:.5rem;font-size:1.5rem;display:block}.nav-text{font-size:.9rem;display:block}.main{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:2rem}.data-management{background:#fff;flex-wrap:wrap;justify-content:center;gap:1rem;margin-top:2rem;padding:1.5rem;display:flex;box-shadow:0 -2px 4px #0000001a}.data-btn{cursor:pointer;border:none;border-radius:4px;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;transition:all .3s}.export-btn{color:#fff;background:#4caf50}.import-btn{color:#fff;background:#2196f3}.data-btn:hover{transform:translateY(-1px);box-shadow:0 2px 4px #0000001a}.footer{color:#fff;text-align:center;background:#333;margin-top:0;padding:1.5rem 0}.footer p{opacity:.8;font-size:.9rem}.mobile-menu-btn{cursor:pointer;background:0 0;border:none;margin-left:1rem;padding:.5rem;display:none}.menu-icon{background:#fff;width:24px;height:2px;transition:all .3s;display:block;position:relative}.menu-icon:before,.menu-icon:after{content:"";background:#fff;width:24px;height:2px;transition:all .3s;position:absolute}.menu-icon:before{top:-8px}.menu-icon:after{bottom:-8px}.mobile-menu{z-index:99;background:#fff;max-height:80vh;position:fixed;top:120px;left:0;right:0;overflow-y:auto;box-shadow:0 2px 4px #0000001a}.mobile-menu ul{flex-direction:column}.mobile-menu li{text-align:left;border-bottom:1px solid #f0f0f0;padding:1rem}.mobile-menu .nav-icon{margin-bottom:0;margin-right:.5rem;display:inline-block}.mobile-menu .nav-text{display:inline-block}:global(.dark) .mobile-menu{background:#1a202c;box-shadow:0 2px 4px #0000004d}:global(.dark) .mobile-menu li{color:#e2e8f0;border-bottom-color:#2d3748}:global(.dark) .mobile-menu li:hover{background:#2d3748}:global(.dark) .mobile-menu li.active{background:#2d3748;border-bottom-color:#667eea}@media (width<=768px){.mobile-menu-btn{display:block}.header-content{text-align:center;flex-direction:column;gap:1rem}.header h1{font-size:2rem}.header p{font-size:1rem}.main{padding:1rem}.data-management{flex-direction:column;align-items:stretch}.data-btn{text-align:center;width:100%}}@media (width>=769px){.mobile-menu{display:none}}