:root{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-sidebar: #0f172a;--text-primary: #1e293b;--text-secondary: #64748b;--text-inverted: #f1f5f9;--accent-color: #3b82f6;--accent-hover: #2563eb;--success-color: #10b981;--danger-color: #ef4444;--warning-color: #f59e0b;--border-color: #e2e8f0;--radius: 8px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--font-sans: "Inter", system-ui, -apple-system, sans-serif}body{margin:0;font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{margin:0;font-weight:600;letter-spacing:-.025em}button{cursor:pointer;font-family:inherit}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.5rem 1rem;border-radius:var(--radius);font-weight:500;border:1px solid transparent;transition:all .2s}.btn-primary{background-color:var(--bg-sidebar);color:#fff}.btn-primary:hover{background-color:#1e293b}.btn-accent{background-color:var(--accent-color);color:#fff}.btn-accent:hover{background-color:var(--accent-hover)}.btn-outline{background-color:transparent;border-color:var(--border-color);color:var(--text-primary)}.btn-outline:hover{background-color:var(--bg-primary)}.card{background:var(--bg-secondary);border-radius:var(--radius);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);padding:1.5rem}.input-group{display:flex;flex-direction:column;gap:.5rem;margin-bottom:1rem}label{font-size:.875rem;color:var(--text-secondary);font-weight:500}input,select{padding:.5rem;border:1px solid var(--border-color);border-radius:var(--radius);font-size:1rem;outline:none;transition:border-color .2s}input:focus,select:focus{border-color:var(--accent-color);box-shadow:0 0 0 2px #3b82f61a}.layout{display:flex;min-height:100vh}.sidebar{width:250px;background-color:var(--bg-sidebar);color:var(--text-inverted);display:flex;flex-direction:column;padding:1.5rem}.main-content{flex:1;padding:2rem;overflow-y:auto}.sidebar-link{display:flex;align-items:center;gap:.75rem;padding:.75rem;color:#94a3b8;text-decoration:none;border-radius:var(--radius);margin-bottom:.5rem;transition:color .2s}.sidebar-link:hover,.sidebar-link.active{background-color:#ffffff1a;color:#fff}.alert{padding:1rem;border-radius:var(--radius);margin-bottom:1rem;font-weight:500}.alert-error{background-color:#fef2f2;color:var(--danger-color);border:1px solid #fecaca}