*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Inter,Segoe UI,sans-serif;color:#111827;background:#f9fafb;line-height:1.6;-webkit-font-smoothing:antialiased}header{background:#fff;border-bottom:1px solid #e5e7eb;padding:16px 0}.nav{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center}.logo{font-weight:700;font-size:18px;color:#1d4ed8;text-decoration:none}.logo:before{content:"🛡 "}.nav-links a{color:#4b5563;text-decoration:none;margin-left:24px;font-size:14px;font-weight:500}.nav-links a:hover{color:#1d4ed8}.container{max-width:1200px;margin:0 auto;padding:32px 24px}.container-narrow{max-width:480px;margin:0 auto;padding:64px 24px}h1{font-size:36px;font-weight:800;line-height:1.1;margin-bottom:16px}h2{font-size:24px;font-weight:700;margin:32px 0 12px}h3{font-size:18px;font-weight:600;margin-bottom:8px}.btn{display:inline-block;padding:10px 20px;border-radius:8px;font-weight:600;font-size:14px;text-decoration:none;border:none;cursor:pointer;transition:all .15s}.btn-primary{background:#1d4ed8;color:#fff}.btn-primary:hover:not(:disabled){background:#1e40af}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:#fff;color:#1d4ed8;border:1px solid #1d4ed8}.grid{display:grid;gap:16px;margin:16px 0}.grid-3{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.card{background:#fff;padding:20px;border-radius:12px;box-shadow:0 1px 3px #0000000d;border:1px solid #e5e7eb}input[type=text],input[type=email],input[type=password],input[type=file]{width:100%;padding:10px 12px;border:1px solid #d1d5db;border-radius:8px;font-size:14px;font-family:inherit}input:focus{outline:2px solid #1d4ed8;border-color:#1d4ed8}label{display:block;font-weight:600;margin-bottom:6px;font-size:14px}.alert{padding:10px 14px;border-radius:8px;background:#fefce8;border-left:4px solid #ca8a04;margin:12px 0;font-size:14px}details summary{-webkit-user-select:none;user-select:none}