:root{--color-primary:#0a2540;--color-accent:#3ec5ff;--color-bg:#f7f9fc;--color-bg-white:#fff;--color-text-primary:#1f2937;--color-text-secondary:#6b7280;--color-border:#e5e7eb;--color-success:#10b981;--color-danger:#ef4444;--sidebar-width:250px;--header-height:64px;--spacing-xs:.5rem;--spacing-sm:1rem;--spacing-md:1.5rem;--spacing-lg:2rem;--spacing-xl:3rem;--radius-sm:6px;--radius-md:8px;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a;--transition:all .2s ease-in-out}*{box-sizing:border-box;margin:0;padding:0}body{color:var(--color-text-primary);background-color:var(--color-bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}h1,h2,h3,h4,h5,h6{margin-bottom:var(--spacing-sm);color:var(--color-primary);font-weight:600;line-height:1.2}.btn{text-align:center;border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);border:none;padding:.75rem 1.5rem;font-size:1rem;font-weight:500;text-decoration:none;display:inline-block}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover{background-color:#0d3558}.btn-danger{background-color:var(--color-danger);color:#fff}.btn-danger:hover{background-color:#dc2626}.btn-block{width:100%;display:block}.card{border-radius:var(--radius-md);padding:var(--spacing-lg);box-shadow:var(--shadow-md);background:#fff}input[type=text],input[type=email],input[type=password],textarea,select{border:2px solid var(--color-border);border-radius:var(--radius-sm);width:100%;transition:var(--transition);padding:.75rem 1rem;font-size:1rem}input:focus,textarea:focus,select:focus{border-color:var(--color-accent);outline:none}label{margin-bottom:var(--spacing-xs);color:var(--color-text-primary);font-weight:500;display:block}.form-group{margin-bottom:var(--spacing-md)}.text-center{text-align:center}.text-secondary{color:var(--color-text-secondary)}.mb-sm{margin-bottom:var(--spacing-sm)}.mb-md{margin-bottom:var(--spacing-md)}.mb-lg{margin-bottom:var(--spacing-lg)}.mt-sm{margin-top:var(--spacing-sm)}.mt-md{margin-top:var(--spacing-md)}.mt-lg{margin-top:var(--spacing-lg)}