*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;margin:0;padding:0}.btn-primary{background:linear-gradient(135deg,#3b82f6,#1d4ed8);color:#fff;border:none;border-radius:8px;padding:12px 20px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:8px}.btn-primary:hover{background:linear-gradient(135deg,#2563eb,#1e40af);transform:translateY(-1px);box-shadow:0 4px 12px #3b82f666}