.header{background-color:var(--surface-color);border-bottom:1px solid var(--border-color);padding:1rem 0}.header-content{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 2rem}.logo{display:flex;align-items:center;gap:.5rem}.logo-icon{color:var(--primary-color)}.logo h1{font-size:1.5rem;font-weight:600;color:var(--text-primary)}.nav{display:flex;gap:1rem}.nav-item{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;text-decoration:none;color:var(--text-secondary);border-radius:4px;transition:all .2s}.nav-item:hover{background-color:var(--background-color);color:var(--text-primary)}.nav-item.active{background-color:var(--primary-color);color:#fff}@media (max-width: 768px){.header-content{padding:0 1rem}.nav-item{padding:.5rem}.nav-item span{display:none}}.app{min-height:100vh;display:flex;flex-direction:column}.main{flex:1;padding:2rem}@media (max-width: 768px){.main{padding:1rem}}:root{--primary-color: #2563eb;--secondary-color: #64748b;--accent-color: #f59e0b;--danger-color: #ef4444;--success-color: #10b981;--background-color: #f8fafc;--surface-color: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--border-color: #e2e8f0}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--background-color);color:var(--text-primary)}.container{max-width:1200px;margin:0 auto;padding:2rem}.card{background:var(--surface-color);border-radius:8px;box-shadow:0 1px 3px #0000001a;padding:1.5rem;margin-bottom:1rem}.btn{padding:.5rem 1rem;border:none;border-radius:4px;font-size:.875rem;cursor:pointer;transition:all .2s}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:#1d4ed8}.btn-secondary{background-color:var(--secondary-color);color:#fff}.btn-success{background-color:var(--success-color);color:#fff}.btn-danger{background-color:var(--danger-color);color:#fff}.form-group{margin-bottom:1rem}.form-label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-primary)}.form-input{width:100%;padding:.5rem;border:1px solid var(--border-color);border-radius:4px;font-size:.875rem}.form-select{width:100%;padding:.5rem;border:1px solid var(--border-color);border-radius:4px;font-size:.875rem;background-color:var(--surface-color)}.grid{display:grid;gap:1rem}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}@media (max-width: 768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}