*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:#f3f4f6;color:#1f2937;line-height:1.5}.container{max-width:1200px;margin:0 auto;padding:0 20px}.btn{display:inline-block;padding:10px 20px;border:none;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;transition:background-color .2s,transform .1s}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn-primary{background-color:#2563eb;color:#fff}.btn-primary:hover{background-color:#1d4ed8}.btn-danger{background-color:#dc2626;color:#fff}.btn-danger:hover{background-color:#b91c1c}.btn-secondary{background-color:#6b7280;color:#fff}.btn-secondary:hover{background-color:#4b5563}.card{background:#fff;border-radius:8px;box-shadow:0 1px 3px #0000001a;padding:24px}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:6px;font-weight:500;color:#374151}.form-group input{width:100%;padding:10px 12px;border:1px solid #d1d5db;border-radius:6px;font-size:14px}.form-group input:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 3px #2563eb1a}.error-message{background-color:#fef2f2;border:1px solid #fecaca;color:#dc2626;padding:12px;border-radius:6px;margin-bottom:16px}.success-message{background-color:#f0fdf4;border:1px solid #bbf7d0;color:#16a34a;padding:12px;border-radius:6px;margin-bottom:16px}header{background:#fff;box-shadow:0 1px 3px #0000001a;padding:16px 0;margin-bottom:32px}header .container{display:flex;justify-content:space-between;align-items:center}header h1{font-size:20px;color:#1f2937}header nav{display:flex;gap:16px;align-items:center}header nav a{color:#4b5563;text-decoration:none;font-weight:500}header nav a:hover{color:#2563eb}.user-info{display:flex;align-items:center;gap:12px}.user-name{color:#6b7280}@media(max-width:768px){header .container{flex-direction:column;gap:16px}}