:root{--primary:#667eea;--secondary:#764ba2;--bg-color:#f3f4f6;--surface:#fff;--text-main:#1f2937;--text-muted:#6b7280;--border-color:#e5e7eb;--danger:#ef4444;--success:#10b981;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--shadow-hover:0 20px 25px -5px #0000001a, 0 10px 10px -5px #0000000a}@media (prefers-color-scheme:dark){:root{--bg-color:#111827;--surface:#1f2937;--text-main:#f9fafb;--text-muted:#9ca3af;--border-color:#374151}}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);-webkit-font-smoothing:antialiased;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}.app-container{min-height:100vh;display:flex}.sidebar{background:var(--surface);border-right:1px solid var(--border-color);flex-direction:column;width:260px;display:flex}.sidebar-header{background:linear-gradient(135deg, var(--primary), var(--secondary));-webkit-text-fill-color:transparent;border-bottom:1px solid var(--border-color);-webkit-background-clip:text;align-items:center;gap:.5rem;padding:1.5rem;font-size:1.25rem;font-weight:800;display:flex}.sidebar-nav{flex-direction:column;flex:1;gap:.5rem;padding:1.5rem 1rem;display:flex}.nav-link{color:var(--text-muted);border-radius:.5rem;align-items:center;gap:.75rem;padding:.75rem 1rem;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-link:hover{background:var(--bg-color);color:var(--text-main)}.nav-link.active{color:var(--primary);background:linear-gradient(135deg,#667eea1a,#764ba21a);font-weight:600}.main-content{flex-direction:column;flex:1;display:flex;overflow:hidden}.header{background:var(--surface);border-bottom:1px solid var(--border-color);height:64px;color:var(--text-main);align-items:center;padding:0 2rem;font-weight:600;display:flex}.page-container{flex:1;padding:2rem;overflow-y:auto}.card{background:var(--surface);box-shadow:var(--shadow-sm);border:1px solid var(--border-color);border-radius:1rem;overflow:hidden}.card-header{border-bottom:1px solid var(--border-color);padding:1.25rem 1.5rem;font-size:1.1rem;font-weight:600}.card-body{padding:1.5rem}.btn{cursor:pointer;border:none;border-radius:.5rem;justify-content:center;align-items:center;gap:.5rem;padding:.625rem 1.25rem;font-size:.95rem;font-weight:500;transition:all .2s;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;box-shadow:0 4px 6px #667eea40}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 12px #667eea66}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#dc2626}.btn-outline{border:1px solid var(--border-color);color:var(--text-main);background:0 0}.btn-outline:hover{background:var(--bg-color)}.input{border:1px solid var(--border-color);background:var(--bg-color);width:100%;color:var(--text-main);border-radius:.5rem;outline:none;padding:.625rem 1rem;font-size:.95rem;transition:border-color .2s}.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #667eea1a}.grid-3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;display:grid}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.4s forwards fadeIn}.modal-overlay{z-index:50;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#00000080;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal{background:var(--surface);width:90%;max-width:500px;box-shadow:var(--shadow-lg);border-radius:1rem;flex-direction:column;display:flex}.modal-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:1.25rem 1.5rem;font-weight:600;display:flex}.modal-close{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:.25rem;padding:.25rem}.modal-close:hover{background:var(--bg-color);color:var(--text-main)}.modal-body{padding:1.5rem}.modal-footer{border-top:1px solid var(--border-color);justify-content:flex-end;gap:1rem;padding:1.25rem 1.5rem;display:flex}