:root{--primary: #667eea;--primary-dark: #5a67d8;--secondary: #764ba2;--accent: #ffc107;--success: #28a745;--danger: #dc3545;--background: #f0f2f5;--surface: #ffffff;--text: #333333;--text-secondary: #666666;--border: #e0e0e0;--radius: 12px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--background);color:var(--text);line-height:1.5}button{cursor:pointer;border:none;font-family:inherit}.app-container{display:flex;min-height:100vh}.sidebar{width:250px;background:#fff;border-right:1px solid var(--border);padding:20px;display:flex;flex-direction:column;position:fixed;height:100vh;z-index:100}.main-content{flex:1;margin-left:250px;padding:30px;max-width:1600px}.nav-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius);color:var(--text-secondary);text-decoration:none;transition:all .2s;margin-bottom:8px;font-weight:500}.nav-item:hover{background-color:#f8f9fa;color:var(--primary)}.nav-item.active{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);color:#fff;box-shadow:0 4px 12px #667eea4d}.card{background:var(--surface);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:20px}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.card-title{font-size:1.25rem;font-weight:600;color:var(--text)}.grid-cols-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.grid-cols-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.grid-cols-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.grid-cols-5{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}@media(max-width:1024px){.grid-cols-4,.grid-cols-5{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.sidebar{transform:translate(-100%);transition:transform .3s}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.grid-cols-2,.grid-cols-3,.grid-cols-4,.grid-cols-5{grid-template-columns:1fr}}